takashi kuboki
| Department of Mechanical and Intelligent Systems Engineering | Professor |
| Cluster III (Fundamental Science and Engineering) | Professor |
Researcher Information
Field Of Study
Career
Educational Background
Member History
- Apr. 2022 - Present
庶務理事（国際交流，産学連携）, 日本塑性加工学会 - Apr. 2022 - Present
創形創質部会 副部会長, 日本鉄鋼協会 - Apr. 2018 - Present
チューブフォーミング分科会 主査, 日本塑性加工学会 - Apr. 2005 - Present
プログラム編集委員, 日本鉄鋼協会 - Nov. 2021 - Nov. 2022
Chair of TUBEHYDRO2022 (国際会議TUBEHYDRO 2022), TUBEHYDRO2022 - Apr. 2018 - Mar. 2022
研究振興助成審査委員, 日本鉄鋼協会 - Apr. 2016 - Mar. 2018
チューブフォーミング分科会 庶務幹事, 日本塑性加工学会 - Apr. 2003 - Mar. 2017
伸線技術分科会 会計幹事（2004年10月-2006年3月を除く）, 日本塑性加工学会 - Apr. 2005 - Mar. 2016
ロールフォーミング分科会 運営委員, 日本塑性加工学会 - Apr. 2003 - Mar. 2016
チューブフォーミング分科会 運営委員, 日本塑性加工学会 - Apr. 2012 - Mar. 2014
庶務理事（国際交流）, 日本塑性加工学会 - Apr. 2005 - Mar. 2014
企画委員, 軽金属学会 - Apr. 2009 - Mar. 2013
50周年実行委員, 日本塑性加工学会 - Apr. 2008
Corresponding Member, Interviewer, 英国機械技術者協会, Society - Apr. 2003 - Mar. 2005
ふぇらむ会報委員会委員, 日本鉄鋼協会, Society - Apr. 2004
チューブフォーミング分科会 委員, 日本塑性加工学会, Society - May 2003
伸線技術分科会運営委員, 日本塑性加工学会, Society - Apr. 1998 - Mar. 1999
棒鋼・線材圧延３次元ＦＥＭ解析システムのﾌｫﾛｰｱｯﾌﾟ委員会委員, 日本鉄鋼協会, Society - Apr. 1996 - Mar. 1998
棒鋼・線材圧延３次元ＦＥＭ解析システムの開発研究会委員, 日本鉄鋼協会, Society
Research Activity Information
Award
- May 2025
日本塑性加工学会
日本塑性加工学会 フェロー - Aug. 2023
THE INTERNATIONAL ACADEMY FOR PRODUCTION ENGINEERING
Fellow of CIRP, Takashi Kuboki - Jun. 2023
The Japan Society for Technology of Plasticity
Effect of Inclusions on Internal Fracture in Skew Rolling
Paper award, Koji YAMANE;Kazuhiro SHIMODA;Koichi KURODA;Shohei KAJIKAWA;Takashi KUBOKI - Jun. 2017
Japan society of technology for plasticity
レーザ切断材の曲げ加工時に発生する長手そり抑制技術の開発
日本塑性加工学会賞 技術開発賞（一般）, Yingjun Jin;Takahiro Shibata;Nobuto Miyashita;Hitoshi Omata;He Huang
Japan society, Japan - May 2016
公益財団法人 天田財団
傾き自在な工具を用いた薄板・箔のマイクロ逐次打点成形
天田財団 第14回助成研究成果発表会 優秀賞, 久保木 孝
Publisher - Apr. 2016
日本塑性加工学会 東京・南関東支部
レーザ切断材の曲げ加工時に発生する長そり抑制技術の開発
日本塑性加工学会 東京・南関東支部 技術開発賞, 金 英俊;柴田 隆浩;宮下 信人;小俣 均;黄 河;久保木 孝
Japan society, Japan - May 2004
日本塑性加工学会論文賞「冷間据込み時の割れ発生予測」 - May 2003
United States of America
The Silver Certificate Award from Wire Association International
United States - May 2002
Japan
日本塑性加工学会論文賞｢ダイレスＵベンド法の理論解析｣
Japan - May 2001
Japan
日本塑性加工学会新進賞
Japan - Feb. 2001
Japan
線材製品協会懸賞論文１等賞｢抽伸加工材の残留応力低減技術に関する研究｣
Japan - Oct. 1991
Japan
Medal for Outstanding Paper from JSME:"Estimation of transmission error of cylindrical involute gears by tooth contact pattern"
Japan
Paper
- Injection compression molding of wood powder mixed with natural binder [Authors_in_jpn] none
Ryo Kawase; Takashi Kuboki; Shohei Kajikawa
Materials Research Proceedings, 54, 2503-2508, May 2025, Peer-reviwed
International conference proceedings - Simulation of lateral compressive deformation of wood by finite element analysis with lattice model
Shohei Kajikawa; Keitaro Oda; Takashi Kuboki; Soichi Tanaka; Masahiro Kondo; Mitsuru Abe; Masako Seki; Tsunehisa Miki
Materials Research Proceedings, 54, 1882-1890, May 2025, Peer-reviwed
International conference proceedings, English - Rotary tube flaring using a conical punch with grooves for high forming limit and productivity
Shohei Kajikawa; Kiwamu Uchida; Takashi Kuboki
CIRP Annals, Elsevier BV, Apr. 2025
Scientific journal - Effect of plug geometry on forming accuracy in tube expansion drawing process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
The International Journal of Advanced Manufacturing Technology, Springer Science and Business Media LLC, 08 Mar. 2025, Peer-reviwed
Scientific journal - Fin Formation on Tube Outer Surface by Inner Ball Spin Forming
Soma Oguri; Shohei Kajikawa; Takashi Kuboki
Last, 92-95, Mar. 2025, Peer-reviwed
International conference proceedings, English - Effect of mechanical properties of worked material and roller axial position in twist rolling
Yutaro Ogura; Kazuyuki Shiobara; Shohei Kajikawa; Takahiro Makiyama; Takashi Kuboki
Last, 88-91, Mar. 2025, Peer-reviwed
International conference proceedings, English - Deep container fabrication by forging wood powder compact
Haruna Suzuki; Takashi Kuboki; Shohei Kajikawa
International Conference on Materials Processing Technology 2025, 84-87, Mar. 2025, Peer-reviwed
International conference proceedings, English - Effect of plug shape on forming square tube by expansion drawing
Yusuke Kato; Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
The International Journal of Advanced Manufacturing Technology, Springer Science and Business Media LLC, 20 Jan. 2025, Peer-reviwed, Abstract
This study clarifies the plug shape for forming a square tube with high dimensional accuracy from a circular tube using expansion drawing, with the effects of plug parameters — width, corner angle, and corner radius of the plug — on the thickness distribution and dimensional accuracy of the drawn tube (aluminum alloy 1070) evaluated using finite element analysis and experiments. When the plug width was large, local thinning occurred at the corners of the drawn tube; when the plug width was small, a gap appeared between the plug and the drawn tube. Local thinning and gaps can be suppressed by decreasing the half-angle. In addition, the local thinning at the corner of the drawn tube increased when the corner radius was small. The experimental results were consistent with the analysis results. An evaluation based on Japanese industrial standards showed that both the experimental and analytical results of the drawn tubes met these standards.
Scientific journal - Spin Forming of Thin-walled Copper Tubes with High Reduction Ratio Using Torus-shaped Tool
Taizan KANEKO; Shohei KAJIKAWA; Takashi KUBOKI
Last, Journal of the Japan Society for Technology of Plasticity, The Japan Society for Technology and Plasticity, 2025, Peer-reviwed
Scientific journal, Japanese - Spinner Straightening Process for Stainless Steel Tube with Thickness-to-diameter Ratio of 20%
Kazuki Nagasawa; Shohei Kajikawa; Takashi Kuboki
Last, Tubehydro 2024, 27-33, Nov. 2024
International conference proceedings, English - Diameter Reduction of Thin-Walled Copper Tubes by Torus-Shaped Tools
Taizan Kaneko; Shohei Kajikawa; Takashi Kuboki
Last, Tubehydro 2024, 27-33, Nov. 2024
International conference proceedings, English - Effect of feed pitch on formability in tube expansion using ball spin forming
Soma Oguri; Shohei Kajikawa; Takashi Kuboki
Last, Materials Research Proceedings, 44, 656-662, Sep. 2024, Peer-reviwed
International conference proceedings, English - Effect of counter punch on formability in two-step compression forming for producing extremely deep cup
Shohei Kajikawa; Yutaro Umehara; Takashi Kuboki; Takashi Iizuka
Materials Research Proceedings, 44, 616-624, Sep. 2024, Peer-reviwed
International conference proceedings, English - Influence of particle size on thermal flow behavior of wood powder with sucrose and citric acid
Shohei Kajikawa; Megumi Goto; Takashi Kuboki
30-38, Jun. 2024, Peer-reviwed
International conference proceedings, English - Influence of mechanical properties of tube on forming limits and deformation characteristics in expansion drawing process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Journal of Manufacturing Science and Engineering, ASME International, 1-36, 25 Apr. 2024, Peer-reviwed, Abstract
This paper describes an efficient method of manufacturing thin-walled metal tubes. The proposed method is an expansion drawing and it consists of two stages, flaring and drawing, during which high thickness reduction is achieved because the tube being processed is subjected to tensile stress in both the circumferential and axial directions. The optimal plug half-angle for various materials is investigated using a finite element analysis and experiments, revealing the plug shape with the highest expansion limit and the highest thickness reduction ratio. To investigate the deformation characteristics of different materials during the expansion drawing process, the strain in tubes formed using different materials was measured experimentally using a square grid on the outer surface of the tubes. In addition, a finite element analysis using hypothetical material properties revealed that the work-hardening exponent and friction coefficient affect tube deformation. The results of this work explain the influences of material properties on experimentally observed phenomena. Materials with a large work-hardening exponent are less prone to thinning during forming and have a greater forming limit. On the other hand, the larger the friction coefficient between the plug and the mother tube, the larger the deformation in the axial direction was, and then the thickness reduction increased due to biaxial tension.
Scientific journal - Deep Container Fabrication by Forging with High- and Low-Density Wood
Hinako Uejima; Takashi Kuboki; Soichi Tanaka; Shohei Kajikawa
Journal of Manufacturing and Materials Processing, MDPI AG, 8, 1, 30-30, 06 Feb. 2024, This paper presents a method for applying forging to high-density wood. A cylindrical container was formed using a closed die, and the appropriate conditions for temperature and punch length were evaluated. Ulin, which is a high-density wood, and Japanese cedar, which is a low-density wood and widely used in Japan, were used as test materials. The pressing directions were longitudinal and radial based on wood fiber orientation, and the shape and density of the resulting containers were evaluated. In the case of ulin, cracks decreased by increasing the temperature, while temperature had little effect on Japanese cedar. Containers without cracks were successfully formed by using a punch of appropriate length. The density of the containers was uniform in the punch length l = 20 and 40 mm in the L-directional pressing and l = 20 mm in the R-directional pressing when using ulin, with an average density of 1.34 g/cm3. This result indicates the forging ability of ulin is high compared to that of commonly used low-density woods. In summary, this paper investigated the appropriate parameters for forging with ulin. As a result, products of more uniform density than products made by cutting were obtained.
Scientific journal, English - Effect of Initial Cross-Sectional Shape on Bent Shape in “Bending and Compression Method” for Forming In-Plane Bent Sheet Metal
Tsuyoshi Muraoka; Yusuke Okude; Shohei Kajikawa; Takashi Kuboki
Corresponding, Lecture Notes in Mechanical Engineering, Springer Nature Switzerland, 307-316, 20 Sep. 2023, Peer-reviwed
International conference proceedings, English - Effect of Plug Angle on Formability in Tube Drawing with Diameter Expansion
Shohei KAJIKAWA; Masato ARAKI; Masato WATANABE; Hisatoshi TSUEOKA; Akinori TSUCHIYA; Takashi KUBOKI
Last, Journal of the Japan Society for Technology of Plasticity, The Japan Society for Technology and Plasticity, 64, 750, 123-128, Jul. 2023, Peer-reviwed
Scientific journal, Japanese - Parallel parametric analysis approach based on an s-version FEM for fracture mechanics analysis in designing hole positions
Hiroki SUWA; Yasunori YUSA; Takashi KUBOKI
Mechanical Engineering Journal, Japan Society of Mechanical Engineers, 10, 3, 22-00462-00462, Jun. 2023, Peer-reviwed
Scientific journal, English - Effect of Roller Axial Position and Thickness on a Twisted Angle in the Twist Rolling of Aluminum Alloy 1050 Sheet Metal
Avanish Kumar; Shohei Kajikawa; Takahiro Makiyama; Takashi Kuboki
Corresponding, Metals, MDPI AG, 13, 2, 383-383, 13 Feb. 2023, Peer-reviwed, This paper proposes a new rolling method called “twist rolling” that can continuously form a twisted shape by using taper rollers. The twisted shape of metal sheets is widely used in industrial products such as turbine blades and propellers. Such a shape is normally formed by casting or machining, but there are problems with low efficiency regarding the productivity and yield ratio. Forging processes have also been proposed, but they have problems with the surface property. The present study focuses on rolling to efficiently form a continuously twisted shape. The effect of the axial position of the taper rollers and skew angle on the average specific twisted angle were investigated by experiments and finite element analysis. The relationship between the thickness of sheet metal and the average specific twisted angle was also investigated. The average specific twisted angle decreased as the axial position increased. When the skew angle was smaller and the sheet metal thicker, the average specific twisted angle increased more. Twist rolling can form various twist angles by changing such parameters.
Scientific journal - Effects of Plug Angle on Formability in Tube Drawing with Diameter Expansion
ShiLiang ZHANG; Hikaru KAWAGUCHI; Takashi KUBOKI; Isamu AKASAKA; Yuzo TERASHITA; Masayoshi AKIYAMA; Shohei KAJIKAWA
Journal of the Japan Society for Technology of Plasticity, The Japan Society for Technology and Plasticity, 63, 743, 174-179, Dec. 2022, Peer-reviwed
Scientific journal - Circular tube fabrication by extrusion of wood powder with natural binder using cooled die
Megumi Goto; Yuya Suzumoto; Shohei Kajikawa; Takashi Kuboki
Tubehydro 2022, 66-73, 16 Nov. 2022, Peer-reviwed
International conference proceedings, English - Cylindrical Tube Fabrication by Wood Forging
Hinako Uejima; Takashi Kuboki; Shohei Kajikawa
Tubehydro 2022, 74-81, 16 Nov. 2022, Peer-reviwed
International conference proceedings, English - Feasibility study on application of spinner straightening to thick-walled tube
Tetsuya Komatsu; Shohei Kajikawa; Shinsuke Inoue; Matsumura Hiromichi; Hikaru Seimiya; Takashi Kuboki
Corresponding, Tubehydro 2022, 270-277, 16 Nov. 2022, Peer-reviwed
International conference proceedings, English - Effects of Fin Shape and Tube Thickness on Forming Accuracy and Forming Limit in Rotational Drawing and Bending of Finned Copper Tubing
Riku Yanada; Shohei Kajikawa; Tsuneo Haba; Yasuhiro Ueno; Takashi Kuboki
Corresponding, Tubehydro 2022, 176-184, 15 Nov. 2022, Peer-reviwed
International conference proceedings, English - Development of Flexible Bending Process with Controllable Bending Radius and High Cross-sectional Circularity
Kazuhito Takahashi; Shohei Kajikawa; Riku Usui; Riku Yanada; Takashi Kuboki
Corresponding, Tubehydro 2022, 185-193, 15 Nov. 2022, Peer-reviwed
International conference proceedings, English - Effect of Strain Rate and Punch Shape on Formability in Flaring Process for Tube Diameter Expansion in the Finite Element Analysis
Tsuyoshi Muraoka; Yusuke Okude; Shohei Kajikawa; Takashi Kuboki
Corresponding, Tubehydro 2022, 201-210, 15 Nov. 2022, Peer-reviwed
International conference proceedings, English - Optimization of Contact Angle in Rotary Tube Flaring with Relieved Punch for Realizing High Forming Limit
Shohei Kajikawa; Kazumasa Iizuka; Takashi Kuboki
Tubehydro 2022, 211-216, 15 Nov. 2022, Peer-reviwed
International conference proceedings, English - The influence of mechanical properties of parent tube on formability in the expansion drawing process
Shiliang Zhang; Takashi Kubo; Masayoshi Akiyamaki; Shohei Kajikawa
Tubehydro 2022, 253-260, 15 Nov. 2022, Peer-reviwed
International conference proceedings, English - Circular Tube Forming by Using Extrusion of Wood Powder Combined with Sucrose and Citric Acid
Yuya Suzumoto; Shohei Kajikawa; Takashi Kuboki
Journal of the Society of Materials Science, Japan, 70, 12, 912-917, 01 Dec. 2021, Peer-reviwed
Scientific journal, Japanese - Effect of Contact Area on Formability in Rotary Flaring Using Conical Punch with Groove
Kazumasa Iizuka; Shohei Kajikawa; Takashi Kuboki
COMPLAS XVI, Paper No. 592 (Abstractのみ), 09 Sep. 2021
Scientific journal, English - Finite Element Analysis of Multi-stage Deep Drawing for Forming deep Rectangular Case with High Aspect Ratio
Shohei Kajikawa; Tomoya Takasan; Takashi Kuboki; Kenji Tamaoki; Katsuyuki Onishi; Akira Gunji; Akira Yamauchi
COMPLAS XVI, Paper No. 556 (Full paper), 09 Sep. 2021
International conference proceedings, English - Fabrication of a Ring Groove on Inner Surface of tube by Ironing from Outer Surface Using Displacement Control of Tube Bottom End
Junki Ishino; Shohei Kajikawa; Akira Yamauchi; Akira Gunji; Katsuyuki Onishi; Takashi Kuboki
Corresponding, COMPLAS XVI, Paper No. 552 (Full paper), 09 Sep. 2021
International conference proceedings, English - Development of Twisting Method of Sheet Metal Using Taper Roller
Avanish Kumar; Takahiro Makiyama; Shohei Kajikawa; Takashi Kuboki
Corresponding, COMPLAS XVI, Paper No. 541 (Full paper), 09 Sep. 2021
International conference proceedings, English - A New Ductile Fracture Criterion for Skew Rolling And Its Application to Evaluate the Effect of Number of Rolls
Koji Yamane; Kazuhiro Shimoda; Koichi Kuroda; Shohei Kajikawa; Takashi Kuboki
Corresponding, COMPLAS XVI, 291, 5, Paper No. 677 (Abstractのみ), 09 Sep. 2021
International conference proceedings, English - Asymmetric sheet-metal V-bending applying separate dies with different velocities for diversified bending shapes and operability
Takashi Kuboki; Takahiro Hadano; Wataru Oba; Shohei Kajikawa; Yingjun Jin
Lead, CIRP Annals, Elsevier Ltd., 70, 1, 219-222, 10 Aug. 2021, Peer-reviwed
Scientific journal, English - Fluidity of Wood Composite Combined with Natural Binder on Injection Molding
Shohei Kajikawa; Masaya Horikoshi; Takashi Kuboki; Soichi Tanaka; Kenji Umemura; Kozo Kanayama
Proc. 13th Int. Conf. Techn. Plast. (ICTP2021), Springer International Publishing, 2031-2040, 26 Jul. 2021, Peer-reviwed
Scientific journal, English - Effect of Bending Intensity on Straightness in Spinner Straightener
Keiichiro Kawasaki; Shohei Kajikawa; Hiromichi Matumura; Tetushi Ono; Hikaru Seimiya; Takashi Kuboki
Corresponding, Proc. 13th Int. Conf. Techn. Plast. (ICTP2021), 2055-2065, 26 Jul. 2021, Peer-reviwed
Scientific journal, English - Effect of Expansion Ratio on Formability in Tube Drawing with Diameter Expansion
Hikaru Kawaguchi; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama; Shohei Kajikawa
Proc. 13th Int. Conf. Techn. Plast. (ICTP2021), 1043-1053, 26 Jul. 2021, Peer-reviwed
Scientific journal, English - Tube forming and fabricating technologies for contributing society by tackling problems of Environment and Aging Population [Title_in_jpn] none
Takashi Kuboki; Atsushi Shirayori; Masaaki Mizumura; Noah Utsumi; Yeong-Maw Hwang
Lead, Proc. 13th Int. Conf. Techn. Plast. (ICTP2021), Springer International Publishing, 2883-2897, 26 Jul. 2021, Peer-reviwed
International conference proceedings, English - Flange compression using stepped punch for forming extremely deep cup with flange from aluminum alloy sheet
Shohei Kajikawa; Takashi Kuboki; Takashi Iizuka
Journal of Materials Processing Technology, 2, 288, 01 Feb. 2021, Peer-reviwed
Scientific journal, English - 傾斜圧延において介在物が内部割れに及ぼす影響
Koji YAMANE; Kazuhiro SHIMODA; Koichi KURODA; Shohei KAJIKAWA; Takashi KUBOKI
Corresponding, J. Jpn. Soc. Technol. Plast., 62, 720, 1-7, 25 Jan. 2021, Peer-reviwed
Scientific journal, Japanese - Tube Drawing Process with Diameter Expansion for Effectively Reducing Thickness
Shohei Kajikawa; Hikaru Kawaguchi; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama
Metals, 12, 10, Article Number 1642, 06 Dec. 2020, Peer-reviwed
Scientific journal, English - Ball Spin Forming for Flexible and Partial Diameter Reduction in Tubes
Shota Hirama; Takayuki Ikeda; Shiori Gondo; Shohei Kajikawa; Takashi Kuboki
Corresponding, Metals, MDPI AG, 10, 12, Article number 1627-1627, 04 Dec. 2020, Peer-reviwed, This paper proposed a new ball spin forming equipment, which can form a reduced diameter section on the halfway point of a tube. The effects of forming process parameters on the surface integrity and deformation characteristics of the product were investigated. The proposed method can reduce the diameter in the middle portion of the tube, and the maximum diameter reduction ratio was over 10% in one pass. When the feed pitch of the ball die was more than 2.0 mm/rev, spiral marks remained on the surface of tube. Torsional deformation, axial elongation and an increase in thickness appeared in the tube during the forming process. All of them were affected by the feed pitch and feed direction of the ball die, while they were not affected by the rotation speed of the tube. By sending the ball die towards the fixed part of the tube or by increasing the feed pitch, torsional deformation and elongation decreased, and the amount of thickening increased. When the tube was pressed perpendicularly to the axis without axial feed, a diameter reduction ratio of 21.1% was achieved without defects using a ball diameter of 15.9 mm. The polygonization of the tube was suppressed by reducing the pushing pitch. The ball spin forming has a high advantage in flexible diameter reduction processing on the halfway point of the tube for producing different diameter tubes.
Scientific journal, English - Effect of Particle Size on Thermal Flow of Japanese Cedar Powder Combined with Sucrose and Citric Acid
Shohei Kajikawa; Kiu Cho; Takashi Kuboki; Soichi Tanaka; Kenji Umemura; Kozo Kanayama
Journal of the Society of Materials Science, Japan, 69, 6, 440-450, 01 Jun. 2020, Peer-reviwed
Scientific journal, Japanese - Fabrication of Naturally Derived Wood Products by Thermal Flow Molding of Wood Powder with Sucrose and Citric Acid,
Kajikawa Shohei; Horikoshi Masaya; Kuboki Takashi; Tanaka Soichi; Umemura Kenji; Kanayama Kozo
BioResources, 15, 1, 1702-1715, Jan. 2020, Peer-reviwed
Scientific journal, English - Flexible Diameter Reduction of Tubes with Planetary Balls
Takayuki Ikeda; Shohei Kajikawa; Takashi Kuboki
Corresponding, Tubehydro 2019, 138-144, 20 Nov. 2019, Peer-reviwed
International conference proceedings, English - Recent trends and perspectives in tube forming
Takashi Kuboki
Tubehydro 2019, 1-10, 19 Nov. 2019, Peer-reviwed, Invited
International conference proceedings, English - Improvement of dimensional precision in two-step shear bending method using mandrels
Takashi Kuboki; Daisuke Kusuda; Shohei Kajikawa; Takahiro Noguchi; Kazuaki Adachi
Lead, Tubehydro 2019, 59-66, 19 Nov. 2019, Peer-reviwed
International conference proceedings, English - Experimental investigation of new tube drawing process with diameter expansion
Shohei Kajikawa; Hikaru Kawaguchi; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama
Tubehydro 2019, 67-74, 19 Nov. 2019, Peer-reviwed
International conference proceedings, English - Analysis of spinner straightening utilizing the finite element method
Takashi Kuboki; Keiichiro Kawasaki; Shohei Kajikawa; Hiromichi Matsumura; Tetsushi Ono; Hikaru Seimiya
Lead, XV International Conference on Computational Plasticity (COMPLAS XV), 21-30, 03 Sep. 2019
International conference proceedings, English - Finite element analysis of tube drawing process with diameter expansion
Shohei Kajikawa; Hikaru Kawaguchi; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama
XV International Conference on Computational Plasticity (COMPLAS XV), 48-58, 03 Sep. 2019
International conference proceedings, English - Two-step shear bending of tube with small bending radius for satisfying both space conservation and inner gas/liquid fluidity
TakashiKuboki; DaisukeKusuda; ShoheiKajikawa; Takahiro Noguchi; Kazuaki Adachi
Lead, CIRP Annals, 68, 1, 301-304, Aug. 2019, Peer-reviwed
Scientific journal, English - Two-step forming for improvement of forming limit in rotary nosing with relieved die for fabrication of axisymmetric and eccentric nosed tubes
Wataru Oba; Yusuke Imaizumi; Shohei Kajikawa; Takashi Kuboki
Journal of Materials Processing Technology, 262, 350-358, 01 Dec. 2018, Peer-reviwed
Scientific journal, English - Prevention of defect by optimizing mandrel position and shape in rotary draw bending of copper tube with thin wall
Shohei Kajikawa; Guanghui Wang; Takashi Kuboki; Masato Watanabe; Akinori Tsuchiya
Procedia Manufacturing, 15, 828-835, 31 Aug. 2018, Peer-reviwed
Scientific journal, English - Fabrication of ring groove on inner surface of cylindrical blank by ironing from outer surface
Tatsunori Ozawa; Takashi Kuboki; Shohei Kajikawa; Akira Yamauchi; Akira Gunji; Katsuyuki Onishi
Corresponding, Procedia Manufacturing, 15, 899-906, 31 Aug. 2018, Peer-reviwed
Scientific journal, English - An extrusion method of tube with spiral inner fins by utilizing generation of spiral outer fins/grooves
Takashi Kuboki; Michiaki Ishikawa; Shohei Kajikawa; Makoto Murata
Lead, CIRP Annals, Elsevier USA, 67/1, 305-308, Aug. 2018, Peer-reviwed
Scientific journal, English - Flexibility in metal forming
D. Y. Yang; M. Bambach; J. Cao; J. R. Duflou; P. Groche; T. Kuboki; A. Sterzing; A. E. Tekkaya; C. W. Lee
CIRP Annals, Elsevier USA, 64, 2, 743-765, Aug. 2018, Peer-reviwed
Scientific journal, English - EXAMINATION OF WORKING CONDITION FOR REDUCING THICKNESS VARIATION IN TUBE DRAWING WITH PLUG
Takashi Kuboki; Shunsuke Tasaka; Shohei Kajikawa
Lead, COMPUTATIONAL PLASTICITY XIV: FUNDAMENTALS AND APPLICATIONS, 63-71, Sep. 2017
International conference proceedings, English - EFFECT OF TOOL DESIGN ON FORMABILITY IN DEEP DRAWING BY APPLYING COMPRESSIVE FORCE ON FLANGE
Shohei Kajikawa; Takashi Kuboki; Takashi Iizuka
COMPUTATIONAL PLASTICITY XIV: FUNDAMENTALS AND APPLICATIONS, 54-62, Sep. 2017
International conference proceedings, English - Proposal of a numerical model using the finite element analysis of pilger rolling for improvement of computation precision and efficiency
Tsuyoshi Muraoka; Takashi Kuboki; Shohei Kajikawa; Daisaku Yanaga; Kouichi Kuroda
Corresponding, Procedia Engineering, Elsevier Ltd, 207, 2364-2369, Sep. 2017, Peer-reviwed
International conference proceedings, English - Two-step forming for improvement of forming limit in rotary nosing with relieved die for reduction of tube tip
Wataru Oba; Yusuke Imaizumi; Shohei Kajikawa; Takashi Kuboki
Corresponding, Procedia Engineering, Elsevier Ltd, 207, 1743-1748, Sep. 2017, Peer-reviwed
International conference proceedings, English - Upset of bent wire/tube for fabrication of in-plane bent sheet metals with extremely large breadth and small bending radius
Takashi Kuboki; Tsuyoshi Muraoka; Tsubasa Tsubouchi; Shohei Kajikawa
Lead, CIRP ANNALS, 66, 1, 277-280, Aug. 2017, Peer-reviwed
Scientific journal, English - Forming method and characteristics of coiled spring in small coil diameter and with high rectangular ratio in winding wire cross section
T. Muraoka; T. Tsubouchi; K. Takahashi; T. Kuboki; S. Kajikawa
Corresponding, INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 91, 5-8, 2635-2643, Jul. 2017, Peer-reviwed
Scientific journal, English - Effect of groove shape and dimension of die on formability in tube extrusion with spiral inner projections
Michiaki Ishikawa; Taro Yagita; Takashi Kuboki; Shohei Kajikawa; Makoto Murata
Corresponding, The 9th Pacific Rim International Conference on Advanced Materials and Processing (PRICM9), 38-41, 02 Aug. 2016, Peer-reviwed
International conference proceedings, English - A rotary reduction of fine wires/tubes of a wide range of diameters using a pair of concave rolls
Takashi Kuboki; Shohei Kajikawa
Lead, CIRP ANNALS, 65, 1, 277-280, Aug. 2016, Peer-reviwed
Scientific journal, English - Closed-loop control of product properties in metal forming
J. M. Allwood; S. R. Duncan; J. Cao; P. Groche; G. Hirt; B. Kinsey; T. Kuboki; M. Liewald; A. Sterzing; A. E. Tekkaya
CIRP ANNALS, 65, 2, 573-596, 2016, Peer-reviwed
Scientific journal, English - Fabrication of deep cup with flange by in-plane stretch forming applying compressive force in thickness direction
Shohei Kajikawa; Takashi Iizuka; Takashi Kuboki
Key Engineering Materials, Trans Tech Publications Ltd, 716, 897-906, 2016, Peer-reviwed
International conference proceedings, English - Stability of a suppression method of dent and spring-back in zigzag bending of sheet metal/plate
Takashi Kuboki; Takuma Yamada; Shohei Kajikawa; Hiroyuki Abe
Lead, Key Engineering Materials, Trans Tech Publications Ltd, 716, 931-940, 2016, Peer-reviwed
International conference proceedings, English - Light press of sheet metal edge for reducing residual stress generated by laser cutting considering mechanical properties and intensity of residual stress
Atsushi Maeda; Yingjun Jin; Takashi Kuboki
Corresponding, JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 225, 178-184, Nov. 2015, Peer-reviwed
Scientific journal, English - Effect of mandrel position in draw bending of copper tube with thin wall and small diameter
Guanghui Wang; Takashi Kuboki; Masato Watanabe; Akinori Tsuchiya
Corresponding, Tubehydro 2015, 273-280, 10 Sep. 2015, Peer-reviwed
Scientific journal, English - A METHOD FOR SUPPRESSION OF DEFECTS IN ZIGZAG BENDING OF SHEET METAL
Takashi Kuboki; Shota Tanabe; Takahiro Mochizuki; Hiroyuki Abe
Lead, COMPUTATIONAL PLASTICITY XIII: FUNDAMENTALS AND APPLICATIONS, 46-54, Sep. 2015
International conference proceedings, English - Flexible rotary reduction of tube tips by dies with relief surfaces for attaining high forming limit and productivity
Takashi Kuboki; Mitsumasa Abe; Yohei Yamada; Makoto Murata
Lead, CIRP Annals, 64, 1, 269-272, Aug. 2015
Scientific journal - Die design for deep drawing with high-pressured water jet utilizing computer fluid dynamics based on Reynolds' equation
Y. Horikoshi; T. Kuboki; M. Murata; K. Matsui; M. Tsubokura
Corresponding, JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 218, 218, 99-106, Apr. 2015, Peer-reviwed
Scientific journal, English - CNC tube forming method for manufacturing flexibly and 3-dimensionally bent tubes
Makoto Murata; Takashi Kuboki
60 Excellent Inventions in Metal Forming, Springer Berlin Heidelberg, 363-368, 01 Jan. 2015, Peer-reviwed
In book, English - EFFECT OF INITIAL THICKNESS DEVIATION AND REDUCTION ON LONGITUDINAL AND CROSS-SECTIONAL PRECISION AFTER TUBE DRAWING USING PLUG
Shunsuke Tasaka; Takashi Kuboki; Kouichi Kuroda; Tatsuya Okui
COMPUTATIONAL PLASTICITY XIII: FUNDAMENTALS AND APPLICATIONS, 55-64, 2015, Peer-reviwed
International conference proceedings, English - Method of reducing residual stress generated by laser cutting by light indentation
Yingjun Jin; Takahiro Shibata; Atsushi Maeda; Takashi Kuboki
Corresponding, 塑性と加工, The Japan Society for Technology of Plasticity, 55, 646, 1003-1007, 25 Nov. 2014, Peer-reviwed, The aim of the present research is to propose a new method for the reduction of the residual stress which was generated by laser cutting. Laser cutting has been expected to be used as an effective and potent method for cutting out blanks from rolled sheet metals because of its high flexibility of the cutting line and high productivity. However, residual stresses, which are inevitably generated by laser cutting, have been the greatest obstacle to the prevalence of laser cutting. One of the problems is the warping that occurs in the sheet metal subjected to bending processes following laser cutting. The authors present a new method for reducing residual stress generated by laser cutting. The method involves applying is to give light indentation on the sheet metal edge. The FEM analyses were carried out to study the feasibility of this method, to determine the method of applying indentation, and to optimize the conditions. Experiments were conducted for verification. As a result, the warp generated by the residual stress was significantly reduced to one-tenth of that without the new treatment, and the magnitude was satisfactorily small for industrial usage.
Scientific journal, Japanese - Method of reducing residual stress generated by laser cutting by light indentation of sheet metal edge
Atsushi Maeda; Yingjun Jin; Takashi Kuboki
Corresponding, 11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014, 81, 413-418, Oct. 2014, Peer-reviwed
International conference proceedings, English - Deep drawing with high-pressured water jet using ditch-engraved die
Yuki Horikoshi; Takashi Kuboki; Makoto Murata; Kazumi Matsui; Makoto Tsubokura
Corresponding, 11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014, 81, 893-898, Oct. 2014, Peer-reviwed
International conference proceedings, English - Development of coiled springs with high rectangular ratio in cross-section
Tsubasa Tsubouchi; Kazuhito Takahashi; Takashi Kuboki
Corresponding, 11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014, 81, 574-579, Oct. 2014, Peer-reviwed
International conference proceedings, English - Formability improvement by die-bearing grooves in tube extrusion with spiral inner projections
Taro Yagita; Takashi Kuboki; Makoto Murata
11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014, 81, 641-646, Oct. 2014, Peer-reviwed
International conference proceedings, English - A new incremental in-plane bending of thin sheet metals for micro machine components by using a tiltable punch
Takashi Kuboki; Armad Azrie; Yingjun Jin
Lead, CIRP Annals, 63, 1, 249-252, Aug. 2014, Peer-reviwed
Scientific journal, English - 押出し加工による内面壁にねじられた突起を付けた円管の突起数の影響
村田 眞; 久保木 孝
塑性と加工, 日本塑性加工学会, 55, 637, 127-131, 25 Feb. 2014, Peer-reviwed, Extrusion components are used in many industrial systems, such as railroad vehicles and heat exchangers. The demand for components whose section and tube are not uniform is increasing, and there are several studies of nonuniform tubes. A typical extrusion study involves a tube with spiral projections on the inside wall. When the tubes are exchangers, such as in room air conditioners, they raise the heat exchange performance. If the exchanger tube are made of extruded aluminum, spiral projections formed on the inside wall can extend the limit of the exchanger. The exchanger tubes will become inexpensive and the productivity will be improved. We propose a new extrusion method for tubes with spiral projections on the inside wall in this study. The new extrusion method is suitable for mass production, and the setup spiral angle of projections is 30 degrees. The material flow of a billet is changed by the mandrel slots and the tubes with spiral projections on the inside wall are made. The extrusion conditions were experimentally discussed regarding the shape of circular tubes with spiral projections. We experimentally clarified the limit and characteristics of the extrusion of circular tubes with spiral projections on the inside wall in this study.
Scientific journal, Japanese - Characteristics of micro incremental in-plane bending of sheet metal using tiltable punch
Ahmad Azrie; Takashi Kuboki
Corresponding, COMPLAS XII, 63-74, Sep. 2013
International conference proceedings, English - A new schedule-free mandrel-less bending method for straight/pre-shaped long tubes
Takashi Kuboki; Kazuhito Takahashi; Kazuhiko Ono; Kozo Yano
Lead, CIRP ANNALS, 62, 1, 303-306, Aug. 2013, Peer-reviwed
Scientific journal, English - Extrusion of 1050 aluminum circular tube with many spiral projections on inside wall
Makoto Murata; Takashi Kuboki; Hiroyuki Yamazaki
Keikinzoku/Journal of Japan Institute of Light Metals, 63, 4, 135-140, 2013, Peer-reviwed
Scientific journal, Japanese - THE EFFECT OF DIE HALF ANGLE IN TUBE NOSING WITH RELIEVED DIE
Mitsumasa Abe; Takashi Kuboki
Lead, COMPUTATIONAL PLASTICITY XII: FUNDAMENTALS AND APPLICATIONS, 75-85, 2013
International conference proceedings, English - EVALUATION OF WATER FILM BY REYNOLDS EQUATION IN DEEP DRAWING USING HIGH-PRESSURED WATER JET
Takashi Kuboki; Yuki Horikoshi; Makoto Murata; Kazumi Matsui; Makoto Tsubokura
Lead, COMPUTATIONAL PLASTICITY XII: FUNDAMENTALS AND APPLICATIONS, 86-95, 2013
International conference proceedings, English - 内面に多数のねじられた突起を持つ円管の押出し加工
村田眞; 久保木孝; 小林雅志; 山崎弘之(LIXIL
日本塑性加工学会 学会誌「塑性と加工」, 53, 622, 48-52, Nov. 2012, Peer-reviwed
Scientific journal, Japanese - 凹型ロールを用いたフリーサイズ伸線加工
久保木 孝; 仙崎 泰慎
Lead, 塑性と加工, 53, 622, 1008-1012, Nov. 2012, Peer-reviwed
Scientific journal, Japanese - 内面に多数のねじられた突起を持つ円管の押出し加工
村田 眞; 久保木 孝; 小林 雅志; 山崎 弘之
塑性と加工, The Japan Society for Technology of Plasticity, 53, 622, 998-1002, Nov. 2012, Peer-reviwed, Circular tube of copper with spiral projections on the inside wall is used for the improvement of the heat exchange efficiency of the heat exchanger. The copper tube is made by swaging. The copper price is expensive and the swaging manufacture speed is late. If the tube is conventionally manufactured by extrusion and made of aluminum, not only the price of tube becomes cheap but also manufacture speed gets faster. And the projection of spiral shape for heat effective exchanger can be made. We modified the traditional extrusion machine and successfully extruded the trial extruded circular tube with many spiral projections on the inside wall. The billet material is lead. We discussed experimentally the influence of shape and the size on the trial extruded circular tube about processing conditions. The established number of projection is 20 and lead angle is 30 degree with the spiral projection on the inside wall of the circular tube. It was possible to extrude established circular tubes with many spiral projections on the inside wall under appropriated processing conditions.
Scientific journal, Japanese - Application of Rotary Nosing with Relieved Die to Thin Tube with Thickness Ratio of 0.83 %
Takashi Kuboki; Atsushi Kominami
Lead, Metal forming, 547-550, Sep. 2012, Peer-reviwed
International conference proceedings, English - Effect of Rolling Reduction on Mechanical Properties of Copper Plate
Takashi Kuboki; Toru Matsumoto; Yingjun Jin; Kenjiro Terada
Lead, Metal forming, 99-102, Sep. 2012
International conference proceedings, English - Influence of Billet Material of Extruded Circular Tube with Spiral Projections on Inside Wall
Makoto Murata; Takashi Kuboki; Masashi Kobayashi; Hiroyuki Yamazaki
Metal forming, 463-466, Sep. 2012, Peer-reviwed
International conference proceedings, English - Lubrication Characteristics of Deep Drawing with High-pressured Water Jet
Takashi Kuboki; Hiroshi Saito; Yuta Tanaka; Makoto Murata; Kazumi Matsui; Makoto Tsubokura
Lead, Metal forming, 355-358, Sep. 2012, Peer-reviwed
International conference proceedings, English - Prediction of Stress-strain Diagram from Forming Load in Stretch Forming
Takashi Kuboki; Yingjun Jin; Makoto Murata
Lead, International Journal of Mechanical Sciences, 60, 46-53, Jun. 2012, Peer-reviwed
Scientific journal, English - Development of a Tube-Spinning Machine for Thin Tubes with a Large Diameter
Takashi Kuboki; Kazuhito Takahashi; Kazuhiko Sanda; Susumu Moriya; Keisuke Ishida
Lead, MATERIALS TRANSACTIONS, 53, 5, 853-861, May 2012, Peer-reviwed
Scientific journal, English - A5083厚板の曲げ加工におけるスプリングバックに及ぼす曲げ型形状の影響
ハムタ・ナランバータル; 村田眞; 久保木孝; 柴田隆浩; アマダ; 金英俊; 株)アマダ
日本塑性加工学会論文誌/塑性と加工, 第53, 615, 74-78, Apr. 2012, Peer-reviwed
Scientific journal, Japanese - Effects of Punch and Die Parameter on Spring-back at Bending Process of Thick Sheet A5083
Naranbaatar Khamt; Makoto Murata; Takashi Kuboki; Takahiro Shibata; Yingjun Jin
Journal of Japan Society of Technology for Plasticity, 53, 615, 362-366, Apr. 2012, Peer-reviwed
Scientific journal, Japanese - High-Accuracy Bending with Force Control
柴田 隆浩; 金 英俊; 小山 純一; 久保木 孝; 村田 眞
Journal of Japan Society of Technology for Plasticity, 53, 612, 64-68, Jan. 2012, Peer-reviwed
Scientific journal, Japanese - Control of Bending Radius in Incremental Beinding Process of Very Thin Sheet metals
S.Hama; T.Kuboki; M.Murata
Corresponding, Proc.10th INt.Cnf.Techn.Plast,ICTP2011, 1132-1135, Sep. 2011, Peer-reviwed
International conference proceedings, English - Development of a Tube-spinning Machine for Thin Tubes with a Large Diameter
Takashi Kuboki; Makoto Murata; Kazuhito Takahashi; Kazuhiko Sanda; Susumu Moriya; Keisuke Ishida
Lead, Tubehydro 2011, 191-194, Jul. 2011, Peer-reviwed
International conference proceedings, English - Suppression of Flatness in Circular Tube-draw Bending by Applying Side Compression
Kazuhito Takahashi; Takashi Kuboki; Makoto Murata
Corresponding, Tubehydro 2011, 125-128, Jul. 2011, Peer-reviwed
International conference proceedings, English - Effect of Feeding Velocity on Formability in a New Micro-Drawing Process Using a Pair of Concave Rolls
Takashi Kuboki; Yasunori Senzaki; Makoto Murata
Lead, ICOMM 2011, 279-284, Mar. 2011, Peer-reviwed
International conference proceedings, English - Effect of clearance on cut surface in slitting of metallic thin film
T. Kuboki; M. Matsudaira; T. Matsui; M. Murata
Proceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011, 601-606, 2011
International conference proceedings, English - SPRING-BACK PREDICTION BY COMBINATION OF THE FINITE ELEMENT ANALYSIS AND BENT-BEAM THEORY CONSIDERING BAUSCHINGER EFFECT
Toru Matsumoto; Shinntarou Gotoh; Takashi Kuboki; Makoto Murata; Yingjun Jin
Corresponding, COMPUTATIONAL PLASTICITY XI: FUNDAMENTALS AND APPLICATIONS, 126-134, 2011
International conference proceedings, English - Application of Homogenization Method Considering Crystal Plasticity for Prediction of Mechanical Properties for Copper and Low Carbon Steel
Takuya Sueoka; Takashi Kuboki; Makoto Murata; Kouichi Kuroda; Kenjiro Terada
Corresponding, COMPUTATIONAL PLASTICITY XI: FUNDAMENTALS AND APPLICATIONS, 603-609, 2011
International conference proceedings, English - EFFECT OF TEMPERATURE IN FORMABILITY OF COMPOSITE COMPOSED OF OVERLAPPED FIBRE BUNDLE, THERMOPLASTIC RESIN AND METAL
Takashi Kuboki; Shun-Ichi Uematsu; Makoto Murata
Corresponding, COMPUTATIONAL PLASTICITY XI: FUNDAMENTALS AND APPLICATIONS, 80-90, 2011
International conference proceedings, English - Comparison of cutting forces and cut surfaces between new shearing method with horizontal tool movement and conventional shearing
Datao Lu; Makoto Murata; Takashi Kuboki; Yingjun Jin
Keikinzoku/Journal of Japan Institute of Light Metals, 61, 3, 100-106, 2011, Peer-reviwed
Scientific journal, Japanese - Effect of clearance on new shearing method with horizontal tool movement of 1100 aluminum sheet
Datao Lu; Makoto Murata; Takashi Kuboki; Yingjun Jin
International Journal of Advanced Manufacturing Technology, Springer London, 57, 5-8, 647-653, 2011, Peer-reviwed
Scientific journal, English - An analytical method of metal forming considering ageing in the microstructure for carbon steel
Takashi Kuboki; Makoto Murata; D. R. J. Owen
Lead, COMPUTERS & STRUCTURES, 88, 19-20, 1162-1178, Oct. 2010, Peer-reviwed
Scientific journal, English - Deformaiton by V-bending of Thick Plate Matal 5083
Naranbaatar Khamt; Makoto Murata; Takashi Kuboki
Proc. of The 12th International Conference on Aluminum Alloys, 619-624, Sep. 2010, Peer-reviwed
International conference proceedings, English - Influence of Initial Thickness of Circular Tube in Rotary-Draw Bending Adding Axial Pushing Force for Suppression of Flatness
Kazuhito Takahashi; Takashi Kuboki; Makoto Murata; Kouzo Yano
STEEL RESEARCH INTERNATIONAL, 81, 9, 580-583, Sep. 2010, Peer-reviwed
Scientific journal, English - FEM Analysis of Tube Straightener Adopting Implicit Scheme
Takashi Kuboki; He Huang; Makoto Murata; Yohei Yamaguchi; Kouichi Kuroda
STEEL RESEARCH INTERNATIONAL, 81, 9, 584-587, Sep. 2010, Peer-reviwed
Scientific journal, English - Computational Method of Springback in V-bending of Sheet Having Bausching Effect
Kazunari Imai; Jin Yingjun; Hiroki Tsuruta; Junichi Koyama; Takashi Kuboki; Makoto Murata
STEEL RESEARCH INTERNATIONAL, 81, 9, 757-760, Sep. 2010, Peer-reviwed
Scientific journal, English - Effect of Initial Thickness Deviation on Deformed Tube Shape in Tube Spinning
Takashi Kuboki; Naoto Takahashi; Kazuhito Takahashi; Kazuhiko Sanda; Susumu Moriya; Keisuke Ishida; Makoto Murata
STEEL RESEARCH INTERNATIONAL, 81, 9, 978-981, Sep. 2010, Peer-reviwed
Scientific journal, English - Mechanical properties of wire drawn by a new drawing process using a pair of concave rolls
Takashi Kuboki; Kazumichi Aoki; Yasunori Senzaki; Makoto Murata
In-Tech 2010, 133-136, Sep. 2010, Peer-reviwed
International conference proceedings, English - Effect of Tool Angle on New Shearing Method of 1100 Aluminium Sheet
Datao Lu; Makoto Murata; Takashi Kuboki; Yingjun Jin
Proceedings of the 12th International Conference on Aluminium Alloys, 548-553, Sep. 2010, Peer-reviwed
International conference proceedings, English - Deformation Behavior of Joining Tube and Holed Rib by Extrusion
Tsutomu Moroi; Takashi Kuboki; Makoto Murata
Proceedings of the 12th International Conference on Aluminium Alloys, 589-594, Sep. 2010, Peer-reviwed
International conference proceedings, English - Processing Limit in V-bending
Takahiro Shibata; Yingjun Jin; Junichi Koyama; Takashi Kuboki; Makoto Murata
Proceedings of the 12th International Conference on Aluminium Alloys, 613-618, Sep. 2010, Peer-reviwed
International conference proceedings, English - Naranbaatar Khamt, Makoto Murata, Takashi Kuboki, Takahiro Shibata, Yingjun Jin
Deformation by; V-bending of Thick Plate Met
Proceedings of the 12th International Conference on Aluminium Alloys, 619-624, Sep. 2010, Peer-reviwed
International conference proceedings, English - Composite structure composed of overlapped fibre bundles, thermoplastic resin
Takashi Kuboki; Shun-ichi Uematsu; Makoto Murata
Composites Science and Technology, 70, 9, 1338-1345, Jun. 2010, Peer-reviwed
Scientific journal, English - Deformation in V-bending of aluminum alloy 5083 plate
Khamt Naranbaatar; Makoto Murata; Takashi Kuboki; Takahiro Shibata; J. I N Yingjun
Keikinzoku/Journal of Japan Institute of Light Metals, 60, 6, 264-268, Jun. 2010, Peer-reviwed
Scientific journal, Japanese - 板材のL曲げ加工におけるパンチの軌跡半径の影響
小山純一; 金英俊; 今井一成; 久保木孝; 村田眞
日本塑性加工学学会誌「塑性と加工, 50, 586, 57-61, Nov. 2009, Peer-reviwed
Scientific journal, Japanese - Effect of Punch Track Radius on Mechanism of L-bending of Sheet Metal
unichi Koyama; Yingjun Jin; Kazunari Imai; Takashi Kuboki; Makoto Murata
J. of Japan Society of Technology for Plasticity, 50, 586, 1029-1033, Nov. 2009, Peer-reviwed
Scientific journal, Japanese - Feasibility Study by Finite Element Analysis on Free Size Drawing Using a Pair of Concave Rolls
Takashi Kuboki; Yasunori Senzaki; Makoto Murata
COMPLAS X, 447-450, Sep. 2009, Peer-reviwed
International conference proceedings, English - Analysis of Residual Stress in Carbon Steel after Localized Heating
Takashi Ito; Makoto Murata; Takashi Kuboki; Yingjun Jin
COMPLAS X, 505-508, Sep. 2009, Peer-reviwed
International conference proceedings, English - Effect of Pre-strain history on mechanical characteristics in Aluminium 1070
Jun-ichi Oguri; Takashi Kuboki; Makoto Murata; Kenjiro Terada
COMPLAS X, 509-512, Sep. 2009, Peer-reviwed
International conference proceedings, English - Finite Element Analysis and Experimental Investigation on Circular Tube-Pure Bending
Kazuhito Takahashi; Takashi Kuboki; Makoto Murata
Tubehydro 2009, 188-193, Sep. 2009
International conference proceedings, English - Effect of tube wall thickness in Joining of Aluminum Tube and Holed Rib by Extrusion
Tsutomu Moroi; Takashi Kuboki; Makoto Murata
Key Engineering Materials, 424, 121-128, Sep. 2009, Peer-reviwed
Scientific journal, English - 凹型ロールを用いた伸線加工におけるクラッシュと張力が減率に及ぼす影響
久保木孝; 仙崎泰慎; 村田眞; 中村友彦
日本塑性加工学学会誌「塑性と加工」, 第50, 582, 60-64, Jul. 2009, Peer-reviwed
Scientific journal, Japanese - 凹型ロールを用いた伸線加工におけるクラッシュと張力が減径率に及ぼす影響
久保木孝; 仙崎泰慎; 村田眞; 中村友彦
塑性と加工, The Japan Society for Technology of Plasticity, 7, 50, 650-654, Jul. 2009, Peer-reviwed, In recent years, forming processes of ultrafine and precise products have been playing a key role in the enhancement of the performance and functions of machines and equipment. In particular, ultrathin wire is expected to be used as a material with versatile functions. Wire drawing using hole dies has conventionally been used in the manufacture of thin and ultrathin wires. In thin conventional drawing, dozens of dies with specified hole diameter corresponding to each target diameter of wires are needed. Moreover, in the recent trend of miniaturizing dimensions, the die itself would be difficult to manufacture. In this research, a new wire-drawing method without a die is proposed. The proposed method has a similar machine composition to two roll straighter, i.e. wire is deformed between two skewed rolls. A series of finite element analysis was carried out to examine the suitable roll profile and the effect of crash and tension on the reduction in wire diameter. On the basis of the analysis, a prototype machine was designed and used to verify the efficiency of the new method. Results showed that an 11% reduction in diameter was achieved under optimum condition.
Scientific journal, Japanese - EFFECT OF SHAPE OF DIE ON FORMING LIMIT IN ROTARY NOS-ING WITH RELIEVED DIE
Takashi Kuboki; Atsushi Kominami; Yusuke Ohde; Makoto Murata
The 4th India-Japan Joint Seminar, 109-116, Mar. 2009
International conference proceedings, English - 回転引曲げ加工における円管の軸押し力によるへん平抑制
高橋和仁; 渡邊峻士; 久保木孝; 村田眞; 小野数彦; 矢野巧造
日本塑性加工学学会誌「塑性と加工」, 49, 572, 66-72, Sep. 2008, Peer-reviwed
Scientific journal, Japanese - New Cutting Method for Sheet Metal
Akinori Tanaka; Makoto Murata; Takashi Kuboki; Jin Yingjun
Proceedings of 12th International Conference on Metal Forming，METAL FORMING 2008, 1, 112-118, Sep. 2008
International conference proceedings, English - Formability of A1050 Aluminum Tubes with Different Thickness in Shear Bending Process
Mohammad Goodarzi; Takashi Kuboki; Makoto Murata
Proceedings of 12th International Conference on Metal Forming，METAL FORMING 2008, 79, 233-240, Sep. 2008, Peer-reviwed
International conference proceedings, English - Effect of Temperature on Tube Extrusion and Joining Holed Rib
Tsutomu Moroi; Takashi Kuboki; Makoto Murata
Proceedings of 12th International Conference on Metal Forming，METAL FORMING 2008, 79, 677-684, Sep. 2008, Peer-reviwed
International conference proceedings, English - Effect of Shape of Die on Forming Limit in Rotary Nosing with Relieved Die
Takashi Kuboki; Atsushi Kominami; Yusuke Ohde; Makoto Murata
Proceedings of 12th International Conference on Metal Forming，METAL FORMING 2008, 79, 137-144, Sep. 2008, Peer-reviwed
International conference proceedings, English - Reduction in Flatness Using Axial Compressive Force in Rotary Draw Bending of Circular Tube
Kazuhito Takahashi; Takashi Watanabe; Takashi Kuboki; Makoto Murata; Kazuhiko Ono; Kouzou Yano
J. of Japan Society of Technology for Plasticity, 49, 572, 896-900, Sep. 2008, Peer-reviwed
Scientific journal, Japanese - Joining of 1050 aluminum circular tube and holed rib by extrusion
Tsutomu Moroi; Takashi Kuboki; Yasunori Senzaki; Makoto Murata
Keikinzoku/Journal of Japan Institute of Light Metals, 58, 6, 246-250, Jun. 2008, Peer-reviwed
Scientific journal, Japanese - Effect of plug on levelling of residual stress in tube drawing
Takashi Kuboki; Keigo Nishida; Tomohiro Sakaki; Makoto Murata
Journal of materials processing technology, 204, 1, 162–168-168, Jun. 2008, Peer-reviwed
Scientific journal, English - 平板の面内逐次打点曲げにおける打撃角度の影響
金英俊; 小山純一; 久保木孝; 村田眞
塑性と加工, 49, 569, 579-583, Jun. 2008, Peer-reviwed
Scientific journal, Japanese - Effect of hardening exponent on tube bending
M. Murata; T. Kuboki; K. Takahashi; M. Goodarzi; Y. Jin
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 201, 1-3, 189-192, May 2008, Peer-reviwed
Scientific journal, English - Improvement of forming limit by rotary nosing with a relieved die
T. Kuboki; Y. Ohde; M. Murata
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, 222, 2, 245-253, Feb. 2008, Peer-reviwed
Scientific journal, English - NEW CUTTING METHOD FOR SHEET METAL
Akinori Tanaka; Makoto Murata; Takashi Kuboki; Jin Yingjun
STEEL RESEARCH INTERNATIONAL, 79, 112-118, 2008, Peer-reviwed
Scientific journal, English - EFFECT OF SHAPE OF DIE ON FORMING LIMIT IN ROTARY NOSING WITH RELIEVED DIE
Takashi Kuboki; Atsushi Kominami; Yusuke Ohde; Makoto Murata
STEEL RESEARCH INTERNATIONAL, 79, 137-144, 2008
Scientific journal, English - COMPUTATIONAL METHOD FOR CALCULATION OF FLANGE DIMENSION IN V-BENDING
Kazunari Imai; Junichi Koyama; Jin Yingjun; Makoto Murata; Takashi Kuboki
STEEL RESEARCH INTERNATIONAL, 79, 194-200, 2008, Peer-reviwed
Scientific journal, English - INFLUENCE OF PAD TIP RADIUS ON L BENDING OF SHEET METAL
Junichi Koyama; Yingjun Jin; Kazunari Imai; Makoto Murata; Takashi Kuboki
STEEL RESEARCH INTERNATIONAL, 79, 209-216, 2008, Peer-reviwed
Scientific journal, English - FORMABILITY OF A1050 ALUMINUM TUBES WITH DIFFERENT THICKNESS IN SHEAR BENDING PROCESS
Mohammad Goodarzi; Takashi Kuboki; Makoto Murata
STEEL RESEARCH INTERNATIONAL, 79, 233-240, 2008, Peer-reviwed
Scientific journal, English - SUPPRESSION OF FLATNESS IN TUBE-DRAW BENDING BY APPLYING SUITABLE AXIAL COMPRESSIVE FORCE ACCORDING TO BEND RADII
Kazuhito Takahashi; Takashi Kuboki; Makoto Murata; Kazuhiko Ono; Kouzou Yano
STEEL RESEARCH INTERNATIONAL, 79, 241-248, 2008, Peer-reviwed
Scientific journal, English - EFFECT OF TEMPERATURE ON TUBE EXTRUSION AND JOINING HOLED RIB
Tsutomu Moroi; Takashi Kuboki; Makoto Murata
STEEL RESEARCH INTERNATIONAL, 79, 677-682, 2008, Peer-reviwed
Scientific journal, English - A new extrusion method joining tube and sheet with holed rib
Tstomu Moroi; Takashi Kuboki; Makoto Murata
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, 21, 10, 1548-1552, Oct. 2007, Peer-reviwed
Scientific journal, English - Effect of die corner radius on the formability and dimensional accuracy of tube shear bending
Mohammad Goodarzi; Takashi Kuboki; Makoto Murata
International Journal of Advanced Manufacturing Technology, 35, 35, 66–74-74, Oct. 2007, Peer-reviwed
Scientific journal, English - Thickness Optimization of Axisymmetric Tube Extruded by a New Method Using Tapered Mandrel
Takashi Kuboki; Takahiro Makiyama; Makoto Murata
Computational Plasticity / COMPLAS 9th, 370-373, Sep. 2007, Peer-reviwed
International conference proceedings, English - Precise Control of Thickness in New Tube-Extrusion Method with Tapered Mandrel
Takashi Kuboki; Takahiro Makiyama; Makoto Murata
2nd International Conference on New Forming Technology, 145-155, Sep. 2007, Peer-reviwed
International conference proceedings, English - Characteristics of Tube Bending by MOS Bending Machine
Makoto Murata; Takashi Kuboki; Kazuhito Takahashi
2nd International Conference on New Forming Technology, 135-144, Sep. 2007, Peer-reviwed
International conference proceedings, English - Effect of initial thickness on shear bending process of circular tubes
M. Goodarzi; T. Kuboki; M. Murata
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 191, 1-3, 136-140, Aug. 2007, Peer-reviwed
Scientific journal, English - Forming behavior of shear bending with mandrel as substitution method of hydroforming
Takashi Kuboki; Mohammad Goodarzi; Makoto Murata
Tube Hydro2007, 115-120, Jun. 2007, Peer-reviwed
International conference proceedings, English - リブに穴を有する管の押出し接合加工
諸井努; 久保木孝; 高岡大和; 村田眞
日本塑性加工学会誌「塑性と加工」, 第48, 554, 62-66, Mar. 2007, Peer-reviwed
Scientific journal, Japanese - リブに穴を有する管の押出し接合加工
諸井努; 久保木孝; 高岡大和; 村田眞
塑性と加工, The Japan Society for Technology of Plasticity, 48, 554, 234-238, Mar. 2007, Peer-reviwed, Tubes with an internal rib have a high strength in comparison with those without a rib. These tubes can be used, for example, as structural parts, heat sinks, and impact absorbers. The existence of some holes at the rib enhances the function and value of the tubes. The appropriate positioning of holes at the rib reduces the weight of structural parts while preserving strength. In the case of heat sinks, holes change the fluid flow and realize effective heat transfer. In this research, a new extrusion method is proposed for manufacturing tubes with a holed rib. The method involves the use of a unique mandrel that has a slit along its axis and two guides at the slit exit. A holed plate is fed through the slit and made into a holed rib of the tube. The flow of the billet is investigated. In particular, the effect of the guide height is clarified in this study.
Scientific journal, Japanese - Deep drawing of 1050 aluminum sheets using high pressure jet water as lubricant
村田眞; 久保木 孝
軽金属学会論文誌, 56, 9, 469-473, Sep. 2006
Scientific journal, Japanese - Effect of Tube Thickness on Shear Bending Process of Circular Tubes
Mohammad Goodarzi; Takashi Kuboki; Murata Murata
Proceedings of Advances in Materials and Processing and Technologies, 327, Aug. 2006, Peer-reviwed
International conference proceedings, English - Ironing on Aluminum Circular Tube to Reduce Weight
M. Murata; T. Kuboki
Proceedings of Advances in Materials and Processing and Technologies, 334, Jul. 2006, Peer-reviwed
International conference proceedings, English - Effect of Plug on Leveling of Residual Stress in Tube Drawing
Takashi Kuboki; Keigo Nishida; Tomohiro Sakaki; Makoto Murata
Proceedings of Advances in Materials and Processing and Technologies, P1052, Jul. 2006, Peer-reviwed
International conference proceedings, English - Thickness optimization of axisymmetric tube by three-dimensional finite-element analysis for high-flexural rigidity
T Kuboki; T Makiyama; M Murata
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 220, 4, 473-482, Apr. 2006, Peer-reviwed
Scientific journal, English - 逐次打点曲げ加工における平板の面内曲げ挙動に及ぼす打撃パンチの影響
金英俊; 村田眞; 久保木孝
軽金属学会 学会誌「軽金属」, 56巻, 3, 145-149, Mar. 2006, Peer-reviwed
Scientific journal, Japanese - 逐次打点加工曲げにおける面内曲げ挙動に及ぼす打撃ピッチの影響
金英俊; 久保木孝; 村田眞
塑性と加工, The Japan Institute of Light Metals, 56, 3, 145-149, Mar. 2006, Peer-reviwed, Indentation of punch, beating angle and beating pitch are dominant factors for incremental in-plane bending process. In this paper, the effects of beating pitch on beating force, bending radius and strains in the three directions are clarified by finite element analysis and experiment. The results show that the beating pitch has no effect on bending radius when the actual indentation is same. On the other hand, when the setting indentation is fixed, the beating pitch has an effect on bending radius due to the elastic deformation of punch and the support part. These forming properties of in-plane bending obtained by analysis and experiment had an agreement.
Scientific journal, Japanese - The Effect of Pushing Force on the Shear Bending Process of Circular Tubes
Mohammad Goodarzi; Takashi Kuboki; Makoto Murata
7th International Conference on Technology for Plasticity, 79-80, Oct. 2005
International conference proceedings, English - Simulation for Flat Hemming of Aluminum Sheet Metal
Murata Makoto; Takashi Kuboki
7th International Conference on Technology for Plasticity, 77-78, Oct. 2005
International conference proceedings, English - Tool Design for Suppressing Fracture at the Tip of Tube after Nosing with Die
Takashi Kuboki; Yasuhiko Kimura; Makoto Murata; Takeshi Shimoda
Computational Plasticity / COMPLAS 8th, 599-602, Sep. 2005
International conference proceedings, English - Evaluation Method of Microstructure for Prediction of Ageing Progress in Hypo-eutectoid Carbon Steel
Takashi Kuboki; Akio Miyake; Makoto Murata; Roger Owen
Computational Plasticity / COMPLAS 8th, 978-983, Sep. 2005
International conference proceedings, English - Prediction of static strain hardening progress from cementite morphology in hypo-eutectoid carbon steel
T Kuboki; M Takada; M Murata
MATERIALS SCIENCE AND TECHNOLOGY, 21, 7, 803-812, Jul. 2005, Peer-reviwed
Scientific journal, English - テーパマンドレルを用いた変肉押出し加工の有限要素シミュレーション
牧山高大; 久保木孝; 村田眞
日本塑性加工学会，平成17年度 塑性加工春季講演会講演論文集, 87-88, May 2005
Scientific journal, Japanese - Deformation analysis for the shear bending process of circular tubes
M Goodarzi; T Kuboki; M Murata
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 162, 492-497, May 2005, Peer-reviwed
Scientific journal, English - Influence of strip materials on behavior of incremental in-plane bending
YJ Jin; T Kuboki; M Murata
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 162, 190-195, May 2005
Scientific journal, English - Compression spinning of circular magnesium tube using heated roller tool
M Murata; T Kuboki; T Murai
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 162, 540-545, May 2005, Peer-reviwed
Scientific journal, English - Changing Inside Diameter of Circular Tube Using New Extrusion Method
M.Murata; T.Kuboki; T.Makiyama
Advanced Manufacturing Systems,Proceeding of The 8th India-Japan Joint Seminar, 15-20, Feb. 2005, Peer-reviwed
International conference proceedings, English - Design method of die geometry and pass schedule by void index in multi-pass drawing
T Kuboki; M Abe; Y Neishi; M Akiyama
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME, 127, 1, 173-181, Feb. 2005, Peer-reviwed
Scientific journal, English - 2226 Compression of Magnesium Tube Using Spinning
Murata Makoto; Kuboki Takashi
The proceedings of the JSME annual meeting, The Japan Society of Mechanical Engineers, 2005, 615-616, 2005, Magnesium and its alloys are lightest metal in the many actual metal materials. They are taken notice of the material as the structural metal for energy saving. It is very difficult to form the magnesium alloy. But, it is easy to form the alloys over the recrystallization temperature. The many magnesium products are manufactured by casting and are not manufactured by metal forming. The tube has high bending and torsional rigidity as compared with its weight Tubular products are effective industrial parts to reduce their weight. The spinning can form the tubes to various shapes and is an effective metal forming. Authors have invented new CNC spinning machine which has roller tools with heaters. The forming limits, mechanical properties and accuracy are examined.
Japanese - 2225 Nosing Process with Asymmetrical Conical Dies
KUBOKI Takashi; MURATA Makoto; KIMURA Yasuhiko
The proceedings of the JSME annual meeting, The Japan Society of Mechanical Engineers, 2005, 613-614, 2005, In this paper, new die which improves the process limited is proposed for nosing process of the circular tube. The usual dies are the symmetrical axis and cone. The asymmetrical conical dies which possess the relief in circumferential direction were devised. It did experiment of 3 sorts. As the first method, it did the press forming by the usual die. As the second method, while turning the circular tube to the usual die, it did press forming. As the last method, while turning the circular tube, it did the press forming by the new die. As a result, the load was reduced with the die which this paper proposed, and it was confirmed that a processing limit was improved.
Japanese - 2228 Shear Bending Process of Circular Tubes
グダラズィ モハマド; 久保木 孝; 村田 眞
The proceedings of the JSME annual meeting, The Japan Society of Mechanical Engineers, 2005, 619-620, 2005, In order to minimize the space of bent tubular parts, a bending technology with small bending radii is requested. Tube shear bending is a suitable technology to realize a considerable small bending radius, which is very difficult to be manufactured with common cold-bending methods. It can be applied as an effective means when space limitation is a main design factor. Utilizing the shear bending process, production of compact and unified elbow tubular parts is feasible. In this paper, the procedure of tube shear bending has been introduced. Also, an elasto-plastic 3D simulation analysis for shear bending process of circular tubes was undertaken. As the result, the deformation behavior of tube as well as the effect of pushing force have been clarified.
Japanese - 2238 Two roll straightening process of line materials
KUBOKI Takashi; MURATA Makoto; SASAKI Tetsuya
The proceedings of the JSME annual meeting, The Japan Society of Mechanical Engineers, 2005, 639-640, 2005, The straightening is a process of the final step of the steel bar and the wire rod. This paper describes, more popular straightening process, 2roll-straightening technique, and its experimental results. Geometrical and static analysis of concave and a convex roll were done by using three dimensions FEM. The result was that the change in 2-roll angles were equal to amount of bend under straightening process. We produced the straightening experiment machine from the result. And the optimum angle between the roll and roll pressure for 2-roll straightening process was clarified in this paper.
Japanese - 2237 Method of controlling residual stress in drawing process of tube
SAKAKI Tomohiro; KUBOKI Takashi; MURATA Makoto
The proceedings of the JSME annual meeting, The Japan Society of Mechanical Engineers, 2005, 637-638, 2005, This paper describes two methods of controlling residual stress in drawing process. The methods are residual stress controls by (1) "skin-pass" and (2) core-bar drawing that puts mandrel internally in tube. Finite element analyses are conducted in order to investigate the effect of reduction of area and tool geometries on the residual stresses. It is numerically clarified that the "skin-pass" is effective to suppress the residual stress for thick-wall tubes. On the other hand, "core-bar drawing" is effective for thin-wall tubes. These analytical results are verified by the experiments.
Japanese - Suppression of Bending after Steel Bar Drawing by Heavy-Reduction Pass
Takashi Kuboki; Haruhiro Furuta; Masayoshi Akiyama
IMechE Journal of Engineering Manufacture, 216, 12, 1461-1470, Dec. 2004
Scientific journal, English - Numerical re-examination of the micro-scale mechanism of the Bauschinger effect in carbon steels
K Terada; K Matsui; M Akiyama; T Kuboki
COMPUTATIONAL MATERIALS SCIENCE, 31, 1-2, 67-83, Sep. 2004, Peer-reviwed
Scientific journal, English - テーパマンドレルを用いた変肉厚押出し加工におけるテーパ角の影響
牧山高大; 村田眞; 久保木孝
塑性と加工, 45, 524, 737-741, Sep. 2004, Peer-reviwed
Scientific journal, Japanese - 平板の面内逐次打点曲げにおける押込み量の影響
金英俊; 久保木孝; 村田眞
軽金属, 54, 7, 287-292, Jul. 2004, Peer-reviwed
Scientific journal, Japanese - Die-less Bending Method for Precision U-bent Tube and Optimization of the Bending Conditions
Takashi Kuboki; Munekatsu Furugen; Shin-ichiro Osaka; Toshihide Ono
Proceedings of the 7th Japan-India Joint Seminar, 77-85, Feb. 2004
International conference proceedings, English - Development of Prototype CNC Extrusion Machine For Changing Wall Thickness of Tube with Tapered mandrel
Takahiro Makiyama; Takashi Kuboki; Makoto Murata
Asia Youth Forum on Advanced Manufacturing, AYFAM-paper(6), Feb. 2004
International conference proceedings, English - Effect of indentation in in-plane bending of sheet metal by incremental beating
Yingjun Jin; Takashi Kuboki; Makoto Murata
Keikinzoku/Journal of Japan Institute of Light Metals, Japan Institute of Light Metals, 54, 7, 287-292, 2004, Peer-reviwed
Scientific journal, Japanese - Comparison of Tubes with Variable Wall Thickness Produced by New Extrusion Method and Conventional Drawing Method
Takashi Kuboki; Takahiro Makiyama; Makoto Murata
Asia Pacific Tube 2003 in Thailand, 125-135, Sep. 2003
International conference proceedings, English - New Extrusion Process for Variable Wall Thickness Tubes
Takahiro Makiyama; Takashi Kuboki; Makoto Murata
Third International Conference and Exhibition on Design and Production of Dies and Molds, Bursa, Turkey, 177-180, Jun. 2003
International conference proceedings, English - Levelling Effect of Residual Stress by an Ultra-light Reduction at the Final Stage of Bar Drawing Process
Takashi Kuboki; Masayoshi Akiyama; Yutaka Neishi; Kouichi Kuroda
Asia Youth Forum on Advanced Manufacturing in Japan, 1-8, Mar. 2003
International conference proceedings, English - Method for Suppressing the Surface Cracking in Cold Forging
Satoru Watanabe; Yoshifumi Haruhata; Takashi Kuboki; Yutaka Neishi
Wire Journal International, 36, 1, 68-76, Jan. 2003, Peer-reviwed
Scientific journal, English - Influence of carbon content and carbide morphology of carbon steels on the stress-strain curve in the vicinity of yield point
Masayoshi Akiyama; Takashi Kuboki; Kenji Oikawa; Kazumi Matsui; Kenjiro Terada
J. of Materials Science and Technology (IOM), 18, 11, 1272-1278, Dec. 2002, Peer-reviwed
Scientific journal, English - マルチスケールモデリングによるBauschinger効果の発現メカニズムの解明
松井和己; 寺田賢二郎; 秋山雅義; 久保木孝; 及川兼司
日本機械学会, 68, 675, 71-78, Nov. 2002, Peer-reviwed
Scientific journal, Japanese - Influence of Carbon Content and Carbide Morphology on the Stress-Strain Curve and Bauschinger Effect
Takashi Kuboki; Masayoshi Akiyama; Kazumi Matsui; Kenjiro Terada
7th International Conference on Technology for Plasticity, 1201-1206, Oct. 2002
International conference proceedings, English - Reduction in Residual Stress After Cold Bar Drawing
Masayoshi Akiyama; Takashi Kuboki
7th International Conference on Technology for Plasticity, 361-366, Oct. 2002
International conference proceedings, English - Criterion of Crack Initiation in Cold Forging of Steels
Yutaka Neishi; Satoru Watanabe; Yoshifumi Haruhata; Takashi Kuboki; Kouichi Kuroda
7th International Conference on Technology for Plasticity, 715-720, Oct. 2002
International conference proceedings, English - 炭素鋼の微視構造が巨視的な降伏･加工硬化特性に与える影響
松井和己; 寺田賢二郎; 秋山雅義; 久保木孝; 日下桂一; 及川兼司
土木学会 応用力学論文集, 土木学会, 5, 8, 175-183, Aug. 2002, Peer-reviwed
Scientific journal, Japanese - Satoru Watanabe, Yoshifumi Haruhata, Takashi Kuboki, Yutaka Neishi
Satoru Watanabe; Yoshifumi Haruhata; Takashi Kuboki; Yutaka Neishi
Conference Proceedings Wire and Technical Symposium 72nd Annual Convention, 59-69, Jun. 2002
International conference proceedings, English - 冷間据込み時の割れ発生に及ぼす予ひずみの影響
根石豊; 渡部了; 春畑美文; 久保木孝; 黒田浩一
塑性と加工, 43, 496, 401-405, May 2002, Peer-reviwed
Scientific journal, Japanese - A Criterion to Predict the Surface Cracking in Cold Forging
Satoru Watanabe; Yoshifumi Haruhata; Yutaka Neishi; Takashi Kuboki
EAISI 2002 Japan Conference and Exhibition, 1, Paper 2, Apr. 2002
International conference proceedings, English - 冷間据込み時の割れ発生予測
根石豊; 渡部了; 春畑美文; 久保木孝; 黒田浩一
塑性と加工, 日本塑性加工学会, 43, 439, 140-144, Feb. 2002, Peer-reviwed
Scientific journal, Japanese - Mechanism of the Bauschinger effect by the multi-scale modeling
Kazumi Matsui; Kenjiro Terada; Masayoshi Akiyama; Takashi Kuboki; Kenji Oikawa
Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A, Japan Society of Mechanical Engineers, 68, 11, 1559-1566, 2002
Scientific journal, Japanese - Influences of Microstructural Morphology in Carbon Steels on the Initial Yielding Behaviour and the Bauschinger's Effect
AKIYAMA Masayoshi; KUBOKI Takashi; NEISHI Yutaka; MATSUI Kazumi; TERADA Kenjiro
Proceedings of the 1992 Annual Meeting of JSME/MMD, The Japan Society of Mechanical Engineers, 2002, 127-128, 2002, Calculated results by the homogenization methods were compared with the observed results by TEM to validate that morphology of carbide in the microstructure affects the mechanical properties of high carbon steel in the vicinity of initial yield point. The material was 0.80Cmass% carbon steel, and behaviours of two steels prepared by different thermal treatment were compared; (1) perfectly pearlitic structure, and (2) spheroidized carbide structure. It was also shown that similar mechanism occurring in the microstructure in the vicinity of initial yield point also applies to the mechanism dominating the Bauschinger's effect of these two steels.
Japanese - Optimisation of method for reducing residual stresses after cold bar drawing
M. Akiyama; T. Kuboki
Ironmaking and Steelmaking, IOM Communications Ltd., 29, 2, 101-106, 2002, Peer-reviwed
Scientific journal, English - Die design by a void index in multi-pass drawing
T Kuboki; H Furuta; H Yoshikawa; Y Neishi; M Akiyama
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 216, 11, 1043-1049, 2002, Peer-reviwed
Scientific journal, English - ダイレスＵベンド法の曲げ条件の最適化 －管材のダイレスＵベンド法の開発Ⅱ－
久保木孝; 古堅宗勝
塑性と加工, 42, 491, 1243-1247, Oct. 2001, Peer-reviwed
Scientific journal, Japanese - Influence of Mechanical Properties of Metallic Material on the Reducing Effect of Axial Residual Stress after Cold Drawing by a Double-taper Die
Takashi Kuboki; Yutaka Neishi; Kouichi Kuroda; Masayoshi Akiyama
J. of Japan Society of Technology for Plasticity, 日本塑性加工学会, 42, 486, 705-709, Jul. 2001, Peer-reviwed
Scientific journal, English - A study on the direct applicability of a set of grooves of multi-roll wire mills for different materials
K Kuroda; T Kuboki; M Akiyama; C Hayashi
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME, 123, 2, 272-278, May 2001, Peer-reviwed
Scientific journal, English - Method for Suppressing Bending after Asymmetric Cutting of Cold-Drawn Bar
Satoru Watanabe; Masaaki Abe; Takashi Kuboki
Material Science Research International, 379-384, May 2001
International conference proceedings, English - A study on the influence of mechanical properties on the distribution of axial residual stress after cold drawing of metallic bars
T Kuboki; Kawakami, I; Y Neishi; K Kuroda; M AKiyama
MATERIALS SCIENCE RESEARCH INTERNATIONAL, 7, 1, 41-46, Mar. 2001, Peer-reviwed
Scientific journal, English - 抽伸加工材の残留応力低減技術に関する研究
秋山雅義; 阿部正昭; 久保木孝
線材とその製品, 39, 3, 10-21, Mar. 2001, Peer-reviwed
Scientific journal, Japanese - 534 A study on the macroscopic elastic-plastic mechanical behavior of steel affected by its micro-structure
MATSUI Kazumi; OIKAWA Kenji; TERADA Kenjiro; AKIYAMA Masayoshi; KUBOKI Takashi
Proceedings of the 1992 Annual Meeting of JSME/MMD, The Japan Society of Mechanical Engineers, 2001, 549-550, 2001
Japanese - Effect of die geometry on residual stress level present after bar drawing
T Kuboki; M Akiyama; Y Neishi; K Kuroda
IRONMAKING & STEELMAKING, 28, 1, 65-71, 2001, Peer-reviwed
Scientific journal, English - Influence of back-tension on effect of skin pass in minimising residual stress levels after cold rod drawing
T Kuboki; H Yoshikawa; Y Neishi; K Kuroda; M Akiyama
IRONMAKING & STEELMAKING, 28, 2, 117-121, 2001, Peer-reviwed
Scientific journal, English - Design evaluation of multiroll mills for small-diameter wire rolling
K Kuroda; T Kuboki; Y Imamura; C Hayashi
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 215, 1, 77-86, 2001, Peer-reviwed
Scientific journal, English - 引抜き材の非軸対称切削加工時の曲がり抑制に関する検討
渡部了; 阿部正昭; 久保木孝
塑性と加工, 日本塑性加工学会, 41, 476, 896-900, Sep. 2000, Peer-reviwed
Scientific journal, Japanese - 単スタンド解析用剛塑性FEMをベースとしたタンデム圧延解析用アルゴリズムの開発
久保木孝; 黒田浩一; 古田治弘; 村上真司
J. of the Japan Society for Technology of Plasticity, 41, 474, 701-705, Jul. 2000, Peer-reviwed
Scientific journal, Japanese - Levelling Effect of Residual Stress by an Ultra Light Reduction at the Final Stage of Bar Drawing Process
Takashi Kuboki; Masayoshi Akiyama; Yutaka Neishi; Kouichi Kuroda
The 6th International Conference on Residual Stresses, 109-104, Jul. 2000
International conference proceedings, English - ダイレスＵベンド法の理論解析 －管材のダイレスＵベンド法の開発Ⅰ－
久保木孝; 古堅宗勝; 逢阪慎一郎; 小野秀敏
J. of the Japan Society for Technology of Plasticity, 日本塑性加工学会, 41, 473, 617-621, Jun. 2000, Peer-reviwed
Scientific journal, Japanese - 細径線圧延における工具接触状態に及ぼすミル形式の影響
黒田浩一; 秋山雅義; 久保木孝; 林千博
塑性と加工, 日本塑性加工学会, 41, 472, 487-491, May 2000
Scientific journal, Japanese - Effect of final drawing with light reduction on the levelling of residual stress distribution in cold bar drawing
T Kuboki; M Akiyama; Y Neishi; K Kuroda
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 214, 11, 1389-1400, 2000, Peer-reviwed
Scientific journal, English - Development of Die-less Bending Process for Precision U-bent Tube
Takashi Kuboki; Munekatsu Furugen; Shin-ichiro Osaka; Toshihide Ono
The 7th International Conference on Steel Rolling, 318-323, Nov. 1998
International conference proceedings, English - Development of wire-sawing technology for manufacturing compact heat sinks for VLSI packages
M Kojima; T Kuboki; M Tasaka; C Hayashi; T Aihara
INTERNATIONAL JOURNAL OF THE JAPAN SOCIETY FOR PRECISION ENGINEERING, 32, 2, 90-97, Jun. 1998, Peer-reviwed
Scientific journal, English - 歯当たりによる歯車の伝達誤差の推定法
久保愛三; 久保木孝; 野中鉄也
The Japan Society of Mechanical Engineers, The Japan Society of Mechanical Engineers, 56, 529, 2503-2509, Sep. 1990, Peer-reviwed, The correlation between transmission error of gears and some factors which are usually considered to express characteristics of tooth contactt pattern, such as areal percentage and total length of simultaneous contact lines, is examined, but very poor correlation is found. A new method of estimating the transmission error from a tooth contact pattern is introduced. This is a method of supposing a triangular shape for composite error on actual contact line which results in the ridge figure of the composite error surface as a function of tooth contact pattern. The transmission error is derived as a function of this ridge figure. The results estimated by this method showed fairly good correlation with the actual transmission error, especially for low transmitting load. Based on this method, an index value for the magnitude of transmission error is also introduced.
Scientific journal, Japanese
MISC
- Micro incremental forming of sheet metal/foil by tiltable punch
久保木 孝
10 Mar. 2016, From Tech Review ( The Amada Foundation ), 25, 61-66, Japanese, Invited, Introduction commerce magazine - 金属円管の冷間曲げ加工と数値解析の精度向上への展望
久保木孝; 高橋和仁
Sep. 2008, 塑性と加工, 49, 572, 872-877, Japanese, Introduction other - チューブフォーミング
久保木 孝
Aug. 2008, 塑性と加工, 49, 571, 720-724, Japanese, Introduction other - Spinning of Aluminum Tube Using Conical Die with Escape
MURATA Makoto; KUBOKI Takahasi; TAKAHASHI Kazuhito; OHDE Yusuke
10 Oct. 2007, 大会講演概要, 113, 173-174, Japanese, 10022565597, AN10268641 - L bending of sheet metal
JIN Yingjun; KOYAMA Junichi; IMAI Kazunari; KUBOKI Takashi
10 Oct. 2007, 大会講演概要, 113, 171-172, Japanese, 10022565594, AN10268641 - 「TUBEHYDRO 2007」国際会議を中国塑性加工学会と共催
久保木 孝; 吉田 佳典
Sep. 2007, 塑性と加工, 48, 560, 816-818, Japanese, Peer-reviwed, Introduction other - Stretch Bending for Rectangular Tube
TAKAHASHI Kazuhito; KUBOKI Takashi; MURATA Makoto
11 Apr. 2007, 大会講演概要, 112, 101-102, Japanese, 10022564871, AN10268641 - Conical Nosing of Tube using Non-Circular Tapered Die
OHDE Yusuke; MURATA Makoto; KUBOKI Takashi
11 Apr. 2007, 大会講演概要, 112, 103-104, Japanese, 10022564876, AN10268641 - Incremental bending of shaped beams
金 英俊; 山田 拓央; 石上 圭介; 久保木 孝; 村田 眞
11 Apr. 2007, 大会講演概要, 112, 99-100, Japanese, 10022564868, AN10268641 - Evaluation of Strain Distribution in Tube shear Bending Using Numerical Simulation
GOODARZI Mohammad; KUBOKI Takashi; MURATA Makoto
01 Nov. 2004, 大会講演概要, 107, 309-310, English, 10022562195, AN10268641 - Effect of rolling direction on incremental in-plane bending of sheet metal
JIN Yingjun; KUBOKI Takashi; MURATA Makoto
01 Nov. 2004, 大会講演概要, 107, 307-308, Japanese, 10022562191, AN10268641 - Characteristics of Circular Tube Bending by MOS Method
MURATA Makoto
01 Sep. 2004, 材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 17, 5, 1052-1052, Japanese, 0914-6628, 10013506828, AN10056461 - Compression Spinning of Magnesium Tube
MURATA Makoto; KUBOKI Takashi
18 May 2004, 大会講演概要, 106, 163-164, Japanese, 10022561367, AN10268641 - Compression spinning of square tube
ARO Hitomi; KUBOKI Takashi; MURATA Makoto
18 May 2004, 大会講演概要, 106, 285-286, Japanese, 10022561562, AN10268641 - Effect of punch angle on incremental in-plane bending of sheet metal
JIN Y.; KUBOKI T.; MURATA M.
18 May 2004, 大会講演概要, 106, 279-280, Japanese, 10022561551, AN10268641 - 110 The influence of microstructure for the macroscopic elastic-plastic behavior of steel
MATSUI Kazumi; OIKAWA Kenji; TERADA Kenjiro; AKIYAMA Masayoshi; KUBOKI Takashi
The Japan Society of Mechanical Engineers, 27 Nov. 2001, The Computational Mechanics Conference, 2001, 14, 19-20, Japanese, 1348-026X, 110002486161, AA1190257X - A study on the macroscopic elastic-plastic material behavior of steel induced by its microstructures
OIKAWA Kenji; MATSUI Kazumi; TERADA Kenjiro; AKIYAMA Masayosi; KUBOKI Takashi
30 May 2001, 計算工学講演会論文集, 6, 2, 453-454, Japanese, 1342-145X, 10015778979, AN10581224
Books and other publications
- チューブフォーミング - 軽量化と高機能化の管材二次加工 -
栗山 幸久; 水越 秀雄; 内海 能亜; 加藤 和明; 奥出 裕亮; 長谷川 収; 水村 正昭; 淵澤 定克; 福村 卓巳; 白寄 篤; 久保木 孝; 陣内 雄士; 北澤 君義; 寺前 俊哉; 山内 浩行; 山藤 博文; 村上 碩哉; 吉原 正一郎; 古島 剛
Scholarly book, Japanese, Joint work, 第５章 管端加工, コロナ社, 22 Jul. 2019 - 引抜き -棒線から管までのすべて-
浅川基男; 齋藤賢一; 吉田一也; 相沢 隆; 上井 清史; 岩本 隆; 増田智一; 三村正直; 奥井達也; 高杉直樹; 土屋昭則; 久保木 孝; 中野 元裕; 梶川翔平
Scholarly book, Japanese, Joint work, 10.1, 10.3～10.8節(主執筆), コロナ社, 26 May 2017 - 60 Excellent Inventions in Metal Forming
著者数十人の一人
Scholarly book, English, Joint work, pp. 363-368, Springer, 01 Jun. 2015 - Metal forming
Uday S. Dixit; R. Ganesh Narayana; Arbin; Kumar Singh; R. K; Uyyuru Shinjith; Satish V. Kailas; Santosh Kumar; Jay S. Gunaksekara; Arjann Buijk; Gary Huang; Gabriel Barton; Takashi Kuboki; P.P. Date; Ravindra K. Saxena; Prakash M. Dixit; K. Nrashimhan; Vinayak R. Malik; Sumitesh Das
English, Joint work, Chapter 7 Development of New Metal Forming Technologies Utilizing Computational and Experimental Approaches, McGraw Hill Education (India) Private Limited, Jun. 2013 - COMPUTATIONAL METHODS FOR PLASTICITY: THEORY AND APPLICATION
寺田賢二郎; 渡邉育夢; 秋山雅義; 浅井光輝; 石井建樹; 生出佳; 岡澤重信; 久保木孝; 車谷麻緒; 斉木功; 高木知弘; 堤成一郎; 松井和己; 山川優樹
Japanese, Joint translation, 第6章(主担当) 数理塑性理論 第11章(副) 粘塑性 付録A(副) 対称テンソルの等方関数 付録B(副) テンソル指数関数, 森北出版, 2012
Lectures, oral presentations, etc.
- 曲げと圧縮工程を利用した面内曲げ部品の成形
村岡 剛; 奥出 裕亮; 片桐 嵩; 梶川 翔平; 久保木 孝
Oral presentation, Japanese, 2025年度塑性加工春季講演会講演論文集
15 May 2025 - 2ロール矯正における端末太り発生要因推定に向けた解析モデル構築
長澤一輝; 梶川 翔平; 井上晋輔; 斎藤政昭; 清宮光; 久保木 孝
Oral presentation, Japanese, 2025年度塑性加工春季講演会講演論文集
15 May 2025 - 天然系バインダを混合した木材圧粉体の鍛造加工性におよぼす 温度およびバインダ含有率の影響
鈴木 春菜; 久保木 孝; 梶川 翔平
Oral presentation, Japanese, 2025年度塑性加工春季講演会講演論文集
15 May 2025 - プレス加工によるワイヤ - アーク式異種金属積層材の埋め込み
関根 一馬; 永松秀朗; 久保木 孝; 梶川 翔平
Oral presentation, Japanese, 2025年度塑性加工春季講演会講演論文集
14 May 2025 - 2段プレス成形によるフランジ付深底容器の作製
根上 長門; 久保木 孝; 飯塚 高志; 梶川 翔平
Oral presentation, Japanese, 2025年度塑性加工春季講演会講演論文集
14 May 2025 - ひずみ速度とバウシンガー効果を考慮した V 曲げ加工の有限要素解析
村岡 剛; 奥出 裕亮; 梶川 翔平; 久保木 孝
Japanese, 第31回機械材料・材料加工技術講演会
02 Nov. 2024
01 Nov. 2024- 03 Nov. 2024 - 高密度木材の後方押出しにおける変形挙動
梶川 翔平; 植嶋 日奈子; 久保木 孝; 田中 聡一
Oral presentation, Japanese, 第31回機械材料・材料加工技術講演会
02 Nov. 2024
01 Nov. 2024- 03 Nov. 2024 - Proposal for Diameter Reduction of Thin-Walled Copper Tubes by Using Torus-shaped Tools
Taizan Kaneko; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, 2024年度塑性加工春季講演会講演論文集
19 May 2024 - Straightening of drawing bar by using guide
Sho Matsumoto; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, Proc. 2024 Jpn. Spring Conf. Technol. Plast.
17 May 2024 - Application of material-properties prediction method based on crystal plasticity with considering inclusions to spinner-straightening analysis
Kazuki Nagasawa; Tetsuya Komatsu; Shohei Kajikawa; Shinsuke Inoue; Masaaki Saito; Hikaru Seimiya; Takashi Kuboki
Oral presentation, Proc. 2024 Jpn. Spring Conf. Technol. Plast.
17 May 2024 - Forming of polygonal-shaped tube by expansion drawing
Shohei Kajikawa; Yusuke Kato; Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama
Japanese, Proc. 2024 Jpn. Spring Conf. Technol. Plast.
17 May 2024 - The influence of the diameter-to-thickness ratio on formability in expansion drawing process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Oral presentation, Japanese, Proc. 2024 Jpn. Spring Conf. Technol. Plast.
17 May 2024 - Injection and Compression Molding of Wood Powder with Natural Binder
Ryo Kawase; Hinako Uejima; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, Proc. 2024 Jpn. Spring Conf. Technol. Plast.
16 May 2024 - Effect of plug corner radius on forming accuracy in tube expansion drawing process
Shohei Kajikawa; Yusuke Kato; Shiliang Zhang; Takashi Kuboki
Oral presentation, English, The Proceedings of the 74th Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Toyama, Japan, Domestic conference
18 Nov. 2023 - Application of material-properties prediction method based on area reduction in drawing to spinner-straightening analysis
Tetsuya Komatsu; Shohei Kajikawa; Shinsuke Inoue; Hiromichi Matsumura; Hikaru Seimiya; Takashi Kubok
Oral presentation, English, The Proceedings of the 74th Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Toyama, Japan, Domestic conference
18 Nov. 2023 - Fabrication of Containers by Forging with High-Density Wood
Hinako Uejima; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proceedings of the 74th Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Toyama, Japan, Domestic conference
17 Nov. 2023 - Influence of Corner Radius of Plug on Dimensional Accuracy in Expansion Drawing
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Oral presentation, Japanese, The Proceedings of the 74th Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Toyama, Japan, Domestic conference
17 Nov. 2023 - Two-step Press Forming Using Stepped Punch for Producing Deep Aluminum Cup with Flange
Yutaro Umehara; Takashi Kuboki; Takahi Iizuka; Shohei Kajikawa
Oral presentation, Japanese, The Proceedings of the 74th Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Toyama, Japan, Domestic conference
17 Nov. 2023 - Enhancement of Formability in Cold Tube Forming by Unique Tool Shapes and Structures
Takashi Kuboki
Keynote oral presentation, English, 2023 Fall Conference of the Korean Society for Technology of Plasticity and materials processing, Invited
09 Nov. 2023 - Virtual Compression Test by Multi-Scale Approach with Wood Cell Model
Shohei Kajikawa; Shota Oda; Takashi Kuboki; Masahiro Kondo; Mitsuru Abe; Masako Seki; Tsunehisa Miki; Eduardo de; Souza Neto
Oral presentation, COMPLAS XVII
06 Sep. 2023
05 Sep. 2023- 07 Sep. 2023 - Application of Material-properties Prediction Method Based on Area Reduction in Drawing to Spinner-straightening Analysis
Tetsuya Komatsu; Shohei Kajikawa; Shinsuke Inoue; Hiromichi Matsumura; Hikaru Seimiya; Takashi Kuboki
COMPLAS XVII
06 Sep. 2023
05 Sep. 2023- 07 Sep. 2023 - Sheet-Metal Bending Behaviour Considering Strain Rate and Bauschinger Effect in Finite Element Analysis
Tsuyoshi Muraoka; Yusuke Okude; Shohei Kajikawa; Takashi Kuboki
Oral presentation, English, COMPLAS XVII
05 Sep. 2023
05 Sep. 2023- 07 Sep. 2023 - Analytical Study on Effect of Taper Angle And Roller Diameter on Twist Shape in Twist Rolling
Takashi Kuboki; Takahiro Makiyama; Avanish Kumar; Shohei Kajikawa
Oral presentation, English, COMPLAS XVII
05 Sep. 2023
05 Sep. 2023- 07 Sep. 2023 - 有限要素解析による木材の圧縮変形シミュレーション
織田 啓太郎; 久保木 孝; 田中 聡一; 三木 恒久; 梶川 翔平
Japanese, 2023年度塑性加工春季講演会講演論文集
11 Jun. 2023 - ダイレスフレキシブルロール曲げにおける移動経路が曲げ挙動に及ぼす影響
薄井 陸; 梶川 翔平; 高橋 和仁; 梁田 陸; 久保木 孝
Japanese, 2023年度塑性加工春季講演会講演論文集
10 Jun. 2023 - ボールスピンフォーミングを用いた拡管におけるプラグ半角および送りピッチが成形性に及ぼす影響
大栗 宗馬; 梶川 翔平; 久保木 孝
Japanese, 2023年度塑性加工春季講演会講演論文集
10 Jun. 2023 - 拡管型抽伸加工による四角管成形においてプラグ形状が成形性に及ぼす影響
加藤 優亮; 張 世良; 久保木 孝; 秋山雅義; 梶川 翔平
Japanese, 2023年度塑性加工春季講演会講演論文集
10 Jun. 2023 - 逃げ有りパンチを用いた回転口広げ加工においてパンチ接触面数が成形性に及ぼす影響
内田 究; 久保木 孝; 梶川 翔平
Japanese, 2023年度塑性加工春季講演会講演論文集
10 Jun. 2023 - Reproduction of Compression Properties of Conifer by Multiscale Finite Element Analysis with Cell Structure Model
Shota Oda; Takashi Kuboki; Mitsuru Abe; Masahiro Kondo; Masako Seki; Tsunehisa Miki; Shohei Kajikawa
Oral presentation, Japanese, The 73rd Annual Meeting of Japan Wood Research Society
14 Mar. 2023 - Effect of heating condition on flowability and physical properties of the flowed sample of cedar powder mixed with sucrose and citric acid
Megumi Goto; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The 73rd Annual Meeting of Japan Wood Research Society
14 Mar. 2023 - Effect of contact angle on deformation behavior in rotary tube flaring with relieved punch
Shohei Kajikawa; Kazumasa Iizuka; Kiwamu Uchida; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 73th Japanese Joint Conference for the Technology of Plasticity
18 Nov. 2022 - Effect of Steel Ball Travel Path and Travel Speed on Parallel Shrunken Section in Flexible Ball Spin Forming
Taizan Kaneko; Shota Hirama; Shiori Gondo; Shohei Kajikawa; Takashi Kuboki
Oral presentation, The Proc. of the 73th Japanese Joint Conference for the Technology of Plasticity
18 Nov. 2022 - Influence of parent tube material on deformation characteristics in the expansion drawing process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Oral presentation, The Proc. of the 73th Japanese Joint Conference for the Technology of Plasticity
18 Nov. 2022 - FEM study on Effect of Drawing Direction, Die Half Angle and Surface Ratio on Straightness after Drawing
Sho Matsumoto; Shohei Kajikawa; Takashi Kuboki
Oral presentation, The Proc. of the 73th Japanese Joint Conference for the Technology of Plasticity
18 Nov. 2022 - Tool shapes and structures for stress control to achieve high formability and precise forming
Takashi Kuboki
Keynote oral presentation, English, Metal forming 2022, Invited, International conference
12 Sep. 2022 - Human intuition versus numerical method on shape optimization for elongating life of V-bending die
Takashi Kuboki; Shohei Kajikawa; Kazuhito Takahashi
Oral presentation, English, CIRP, General Assembly, STC-F Technical presentation, CIRP, Bilbao, Spain (hybrid), International conference
26 Aug. 2022 - Optimization of the force at tube bottom end in fabrication of a ring groove on tube inner-surface by ironing from outer surface
Junki Ishino; Shohei Kajikawa; Takashi Kuboki
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - Forming of Different Diameter Tubes by Controlling Steel Ball Position in Flexible Ball Spin Forming
Shota Hirama; Shiori Gondo; Shohei Kajikawa; Takashi Kuboki
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - Feasible Study of Dieless Flexible Roll Bending on Forming Limit by Finite Element Analysis
Riku Usui; Shohei Kajikawa; Kazuhito Takahashi; Riku Yanada; Takashi Kuboki
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - Effect of punch shape on formability in wood forging
Hinako Uejima; Shohei Kajikawa; Takashi Kuboki
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - Die-shape optimization for crack prevention and die-life longevity
Ryunosuke Yakuno; Takashi Kuboki; Shohei Kajikawa; Kazuhito Takahashi
Oral presentation
04 Jun. 2022 - Influences of mechanical properties of parent tube on formability in tube expansion drawing
Shiliang Zhang; Shohei Kajikawa; Takashi Kuboki; Masayoshi Akiyama
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - Optimization of working condition in spinner straightening depending on wire-rod diameter and drawing reduction
Tetsuya Komatsu; shohei Kajikawa; Hiromichi Matsumura; Shinsuke Inoue; Hikaru Seimiya; Takashi Kuboki
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - Effect of bending-roll movement on bending limit and dimensional accuracy
Riku Yanada; Shohei Kajikawa; Kazuhito Takahashi; Riku Usui; Takashi Kuboki
Oral presentation, The Proc. of the 2022 Japanese Spring Conference for the Technology of Plasticity
04 Jun. 2022 - マルチスケール有限要素解析による木材の圧縮特性の再現
小田 翔太; 梶川 翔平; 久保木 孝; 阿部 充; 関雅子; 三木 恒久; Eduardo de; Souza Neto
Oral presentation, Japanese, 日本材料学会 第71期学術講演会, 日本材料学会, Domestic conference
29 May 2022 - Densification of Products Injection Molded from Wood Powder Combined with Sucrose and Citric Acid by Optimization of Particle Size
Shohei Kajikawa; Kiu Cho; Takashi Kuboki
Poster presentation, Japanese, The 72nd Annual Meeting of Japan Wood Research Society, Domestic conference
15 Mar. 2022 - 拡管型抽伸加工におけるプラグ半角が成形性に及ぼす影響
張 世良; 川口 光; 梶川 翔平; 久保木 孝; 赤坂 勇; 寺下 雄三; 秋山 雅義
Oral presentation, Japanese, 第72回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
30 Oct. 2021 - 拡管型抽伸加工による角形管成形における工具形状の検討
梶川 翔平; 張 世良; 久保木 孝; 赤坂 勇; 寺下 雄三; 秋山 雅義
Oral presentation, Japanese, 第72回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
30 Oct. 2021 - 逃げ有りプラグを用いた回転口広げ加工 -管の成形性に及ぼすプラグ送り量の影響-
飯塚 和正; 久保木 孝; 梶川 翔平
Oral presentation, Japanese, 第72回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
30 Oct. 2021 - フレキシブルボールスピンフォーミングにおける鋼球径および押込み速度の影響
平間 章太; 池田 峻之; 権藤 詩織; 梶川 翔平; 久保木 孝
Oral presentation, Japanese, 第72回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
30 Oct. 2021 - 外面しごき凹部転写成形における管下端部への軸方向力制御の適用
石野 淳貴; 梶川 翔平; 久保木 孝
Oral presentation, Japanese, 第72回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
30 Oct. 2021 - 冷却ダイを用いた天然系バインダ混合木粉の押出し加工による円管成形
鈴本 雄也; 久保木 孝; 梶川 翔平
Oral presentation, Japanese, 第72回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
29 Oct. 2021 - Tube forming and fabricating technologies for contributing society by tackling problems of Environment and Aging Population
Takashi Kuboki; Atsushi Shirayori; Masaaki Mizumura; Noah Utsumi; Yeong-Maw Hwang
Keynote oral presentation, English, Int. Conf. Techn. Plast. (ICTP2021), Invited, International conference
29 Jul. 2021 - Development of Twisting Method for Sheet Metal using Taper Roll
Avanish Kumar; Shohei Kajikawa; Takashi Kuboki; Takahiro Makiyama
Oral presentation, Japanese, 2021年度塑性加工春季講演会講演論文集, 日本塑性加工学会, Domestic conference
04 Jun. 2021 - Effect of blank shape on deep drawability for forming rectangular cases with high aspect ratio
Tomoya Takasan; Shohei Kajikawa; Takashi Kuboki; Kenji Tamaoki; Katsuyuki Onishi; Akira Gunji; Akira Yamauchi
Oral presentation, Japanese, 2021年度塑性加工春季講演会講演論文集, Domestic conference
04 Jun. 2021 - スクロースおよびクエン酸を混合した木質系粉末の流動性に及ぼす加熱温度および時間の影響
後藤 めぐみ; 梶川 翔平; 久保木 孝
Oral presentation, Japanese, 第71回日本木材学会大会, 日本木材学会, Web講演会, Domestic conference
19 Mar. 2021 - Attempt of tube production by wood powder combining natural binder
Yuya Suzumoto; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, 第71回塑性加工連合講演会講演論文集, 日本塑性加工学会, WEB講演会, Domestic conference
14 Nov. 2020 - Rotary flaring with relieved plug - Effect of contact angle of relieved plug on forming limit and accuracy -
Kazumasa Iizuka; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 71th Japanese Joint Conference for theTechnology of Plasticity, 日本塑性加工学会, Domestic conference
14 Nov. 2020 - Flexible diameter reduction on middle of tube by ball spin forming
Shota Hirama; Takayuki Ikeda; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 71th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, WEB講演会, Domestic conference
14 Nov. 2020 - Fabrication of a ring groove on inner surface of tube by ironing from outer surface using displacement control of tube bottom end
Junki Ishino; Shohei Kajikawa; Takashi Kuboki; Akira Yamauchi; Akira Gunji; Katsuyuki Onishi
Oral presentation, Japanese, The Proc. of the 71th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, WEB講演会, Domestic conference
14 Nov. 2020 - Recent trends and perspectives in tube forming
Takashi Kuboki
Keynote oral presentation, English, TUBEHYDRO 2019, Taiwan Society for Technology of Plasticity, Kaohsiung, Taiwan, International conference
19 Nov. 2019 - V曲げにおける加工空間の縮小を目的とした板材のアンバランス曲げ加工法
羽田野 貴宏; 久保木 孝; 梶川 翔平; 金 英俊; 小俣 均; 黄 河; 木村 圭太
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
13 Oct. 2019 - 銅管断面の肉厚および溝の有無が回転引き曲げ加工における不良現象に及ぼす影響
荒木 聖人; 久保木 孝; 梶川 翔平; 細木 哲郎; 崩岡 久敏; 土屋 昭規
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
13 Oct. 2019 - 天然系バインダを混合した木質系粉末の流動挙動および成形性 に及ぼす粒子サイズの影響
曺 基宇; 梶川 翔平; 久保木 孝
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
12 Oct. 2019 - 転造加工における内部割れ発生要因の検討
松村 和華; 梶川 翔平; 久保木 孝; 山根 康嗣
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
12 Oct. 2019 - 管型抽伸加工法の開発（第2報)－成形性に及ぼす拡管率の影響－
川口 光; 梶川 翔平; 久保木 孝; 赤坂 勇; 寺下 雄三; 秋山 雅義
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
12 Oct. 2019 - スピンナー矯正加工の有限要素法解析
川崎 圭一郎; 久保木 孝; 梶川 翔平; 松村 弘道; 小野 哲士; 清宮 光
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
12 Oct. 2019 - 遊星ボールを用いたフレキシブルな縮径加工
池田 峻之; 久保木 孝; 梶川 翔平
Oral presentation, Japanese, 第70回塑性加工連合講演会講演論文集, 日本塑性加工学会, 習志野市, Domestic conference
12 Oct. 2019 - スクロースおよびクエン酸を混合した木質系粉末の射出成形
梶川 翔平; 堀越 将矢; 久保木 孝
Oral presentation, Japanese, 2019年度塑性加工春季講演会講演論文集, Domestic conference
08 Jun. 2019 - 将来のチューブフォーミング技術
久保木 孝
Oral presentation, Japanese, チューブフォーミング分科会40周年・研究例会第150回記念行事, Domestic conference
11 Mar. 2019 - T. Kuboki, Y. Jin: Light indentation method of sheet-metal edge for suppression of warp in U-shape bending of laser-cut sheets
Takashi Kuboki; Yingjun Jin
Oral presentation, English, CIRP, Winter meeting, STC-F technical presentation, International conference
22 Feb. 2019 - 1D bending process with shear bending
楠田 大介; 久保木 孝; 梶川 翔平; 森本 直之; 野口 敬広; 足立 一晃
Oral presentation, Japanese, 第69回塑性加工連合講演会, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - 断面が均一な矩形のコイルばねの成形法の開発
松村 和華; 岡田 光平; 梶川 翔平; 久保木 孝
Oral presentation, Japanese, 第69回塑性加工連合講演会講演論文集, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - 板金・板材のジグザク曲げ加工における凹凸とスプリングバックの抑制法の安定性
羽田野 貴宏; 久保木 孝; 梶川 翔平; 山田 拓馬; 阿部 浩行
Oral presentation, Japanese, 第69回塑性加工連合講演会講演論文集, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - 内面螺旋溝付管の押出し加工において，管外面形状がリード角に及ぼす影響
原 陽一郎; 石川 道明; 梶川 翔平; 久保木 孝; 村田 眞
Oral presentation, Japanese, 第69回塑性加工連合講演会講演論文集, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - 動的用解法によるスピンナー矯正加工の有限要素法解析
川崎 圭一郎; 楠田 大介; 久保木 孝; 梶川 翔平; 松村 弘道; 小野 哲士; 清宮 光
Oral presentation, Japanese, 第69回塑性加工連合講演会公演論文集, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - 拡管型抽伸加工法の開発－円管材の限界口広げ率に関する検討－
川口光; 梶川翔平; 久保木孝; 赤坂勇; 寺下雄三; 池田正美; 秋山雅義
Oral presentation, Japanese, 第69回塑性加工連合講演会講演論文集, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - 外面しごき加工による円筒内面への凹部転写成形における成形限界の検討
小沢 竜徳; 久保木 孝; 梶川 翔平; 山内 章; 郡司 章; 大西 堅幸
Oral presentation, Japanese, 第69回塑性加工連合講演会講演論文集, 日本塑性加工学会, 熊本市, Domestic conference
27 Oct. 2018 - Effect of mandrel shape on defect phenomena in small-diameter-bending of thin copper tube
Masato Araki; Takashi Kuboki; Shohei Kajikawa; Akinori Tsuchiya; Hisatoshi Tsueoka; Masato Watanabe
Oral presentation, Japanese, The Proc. of the 2018 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Tokyo, Domestic conference
02 Jun. 2018 - Reduction of tube diameter by ball spin forming
Takayuki Ikeda; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 2018 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, 東京, Domestic conference
01 Jun. 2018 - Effect of grain size on formability of wood forming with natural agents
Kiu Cho; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2018 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, 東京, Domestic conference
01 Jun. 2018 - 高圧水を用いた深絞り加工などにおける潤滑剤の流体挙動と塑性変形の準連成解析
久保木 孝
Public discourse, Japanese, 日本塑性加工学会プロセッシング計算力学分科会 第60回セミナー, Invited, 日本塑性加工学会プロセッシング計算力学分科会, Domestic conference
06 Apr. 2018 - Incremental bending of sheet metal using a tiltable punch
Takashi Kuboki; Shohei Kajikawa; Yingjun Jin; Armad Azrie
Oral presentation, Japanese, 日本機械学会関東支部 第24期講演会, 日本機械学会関東支部, 東京都，調布市, Domestic conference
17 Mar. 2018 - Effect of tool shape on formability in stretch forming of sheet metal applying compressive force
Shohei Kajikawa; Takashi Kuboki; Takashi Iizuka
Oral presentation, Japanese, 日本機械学会関東支部 第24期講演会, Domestic conference
17 Mar. 2018 - Effect of particle size on moldability of wood powder combining natural additive
Cho Kiu; Masaya Horikoshi; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, 日本機械学会関東学生会第57回学生員卒業研究発表講演会, 日本機械学会関東支部, 東京都，調布市, Domestic conference
16 Mar. 2018 - Effect of Tool Shape on Rotating Pull Bending of Thin Copper Tube
Masato Araki; Takashi Kuboki; Shohei Kajikawa; Akinori Tsuchiya; Hisatoshi Tsueoka; Masato Watanabe
Oral presentation, Japanese, 日本機械学会関東学生会第57回学生員卒業研究発表講演会, 日本機械学会関東支部, 東京都，調布市, Domestic conference
16 Mar. 2018 - Reduction of tube diameter by planetary-ball spin forming
Takayuki Ikeda; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, 日本機械学会関東学生会第57回学生員卒業研究発表講演会, Domestic conference
16 Mar. 2018 - Control of strain history for obtaining FLD in upset forming and dependency of FLD on hardness
T. Kuboki
Oral presentation, English, CIRP, Winter meeting, STC-F Technical presentation, International conference
22 Feb. 2018 - 内外面に螺旋溝を有する円管の押出し加工法
石川 道明; 久保木 孝; 梶川 翔平; 村田 眞
Oral presentation, Japanese, 第68回塑性加工連合講演会講演論文集, Domestic conference
10 Nov. 2017 - 加工空間の縮小を目的とした板材のアンバランス曲げ加工法
大場 渉; 久保木 孝; 梶川 翔平; 金 英俊; 黄 河
Oral presentation, Japanese, 第68回塑性加工連合講演会講演論文集, Domestic conference
10 Nov. 2017 - ピルガ圧延においてマンドレル支持部の弾性変形が圧延挙動に及ぼす影響
村岡 剛; 久保木 孝; 梶川 翔平; 彌永 大作; 黒田 浩一
Oral presentation, Japanese, 第68回塑性加工連合講演会講演論文集, Domestic conference
10 Nov. 2017 - Effect of Die Position on Straightness of Wire Rods in Spinner Straightener
Daisuke Kusuda; Takashi Kuboki; Shohei Kajikawa; Hiromichi Matsumura; Satoshi Ohno; Hikaru Seimiya
Oral presentation, English, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Domestic conference
10 Nov. 2017 - Fabrication of a Ring Groove on Inner Tube Surface by Ironing from Outer Surface
Tatsunori Ozawa; Takashi Kuboki; Shohei Kajikawa; Yamauchi Akira; Gunji Akira; Katsuyuki Onishi
Oral presentation, English, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Domestic conference
10 Nov. 2017 - Fabrication of a ring groove on inner tube surface by ironing from outer surface
Fabrication of; a; rin; roo; urface by ironing; from outer surface
Oral presentation, Japanese, The Proc. of the 2017 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, 岐阜, Domestic conference
09 Jun. 2017 - Effect of die position on straightness of bar in spinner straightener
Daisuke Kusuda; Takashi Kuboki; Shohei Kajikawa; Hiromichi Matsumura; Tetsushi Ono; Hikaru Seimiya
Oral presentation, Japanese, The Proc. of the 2017 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, 岐阜, Domestic conference
09 Jun. 2017 - スピンナー矯正加工において矯正工具の押込み量が線材の真直度に及ぼす影響
楠田 大介; 久保木 孝; 梶川 翔平; 松村 弘道; 小野 哲士; 清宮 光
Oral presentation, Japanese, 日本機械学会関東学生会第56回学生員卒業研究発表講演会, 日本機械学会関東学生会, 東京, Domestic conference
16 Mar. 2017 - 外面しごき加工による円筒内面への凹部転写成形
小沢 竜徳; 久保木 孝; 梶川 翔平; 山内 章; 郡司 章; 大西 堅幸
Oral presentation, Japanese, 日本機械学会関東学生会第56回学生員卒業研究発表講演会, 日本機械学会関東学生会, 東京, Domestic conference
16 Mar. 2017 - An extrusion method of a tube with a pre-worked rib using a functional mandrel with guides
T. Kuboki; T. Moroi; Makoto Murata
Oral presentation, English, CIRP, Winter meeting, STC-F Technical presentation, International conference
16 Feb. 2017 - Forming method of coiled spring with high rectangle ratio cross section and small diameter
Tsuyoshi Muraoka; Tsubouchi Tsubasa; Takashi Kuboki; Shohei kajikawa
Oral presentation, Japanese, The Proc. of the 67th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Saitama, Domestic conference
23 Oct. 2016 - Effect of Pressure Die Shapes on Formability of Thin-walled Copper Tube in Draw Bending with Small Diameter
Kieita Kimura; Takashi Kuboki; Shohei Kajikawa; Masato Watanabe; Hisatoshi Tsueoka
Oral presentation, Japanese, The Proc. of the 67th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Domestic conference
23 Oct. 2016 - Multi-stage forming process for reduction of tube tips by rotary dies with relief surfaces
Wataru Oba; Yusuke Imaizumi; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 67th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Saitama, Domestic conference
21 Oct. 2016 - Effect of shoulder shape of punch and die on formability of sheet metal in combining process of drawing and ironing by compressive force
Shohei Kajikawa; Takashi Kuboki; Takashi Iizuka
Oral presentation, Japanese, The Proc. of the 67th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Domestic conference
21 Oct. 2016 - Flexible forming processes from/to sheet metals
T. Kuboki; S. Kajikawa
Oral presentation, English, CIRP, General Assembly, STC-F Technical presentation, International conference
26 Aug. 2016 - Development of a forming method of spring with high-rectangle-ratio cross section and small spring diameter
Takashi Kuboki; Shohei Kajikawa; Tsuyoshi Muraoka; Tsubasa Tsubouchi
Oral presentation, Japanese, The Proc. of 2016 Spring Lecture Meeting of Japan Society of Spring Engineers, Domestic conference
09 Jun. 2016 - Effect of Tension and Crash on Reduction in Tube Diameter in Tube Drawing using A Pair of Concave Rolls
Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, 京都, Domestic conference
22 May 2016 - Proposal of a FEA model for shortening calculation time
Tsuyoshi Muraoka; Takashi Kuboki; Shohei Kajikawa; Shohei Kajikawa; Daisaku Yanaga; Koichi Kuroda
Oral presentation, Japanese, The Proc. of the 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Kyoto, Domestic conference
22 May 2016 - The effect of mandrel and pressure die shapes in draw bending of thin-walled copper tube
Keita Kimura; Guanghui Wang; Takashi Kuboki; Shohei Kajikawa; Masato Watanabe; Yoshinori Tsuchiya
Oral presentation, Japanese, 平成28年度塑性加工春季講演会講演論文集, Domestic conference
21 May 2016 - Effect of groove shape and angles of tools on formability in tube extrusion with spiral projections
Michiaki Ishikawa; Taro Yagita; Makoto Murata; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, 京都, Domestic conference
21 May 2016 - Die-less Flexible forming processes on tube
T. Kuboki; S. Kajikawa
Oral presentation, English, CIRP, Winter meeting, STC-F Technical presentation, International conference
18 Feb. 2016 - Appropriate tool geometry for estimation of stress-strain based on punch load in stretch forming
Wataru Oba; YingJun Jin; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 66th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Iwaki, Domestic conference
31 Oct. 2015 - Fabrication of coiled springs with high rectangular ratio in cross-section from hollow coil and its evaluation
Tsuyoshi Muraoka; Tsubasa Tsubouchi; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 66th Japanese Joint Conference for the Technology of Plasticity, Iwaki, Domestic conference
29 Oct. 2015 - 管抽伸加工において初期偏肉と肉厚圧下率が成形後の断面および長手方向寸法精度に及ぼす影響
田坂 俊祐; 久保木 孝; 黒田 浩一; 奥井 達也
Oral presentation, Japanese, 平成27年度塑性加工春季講演会講演論文集, 日本塑性加工学会, 横浜市, Domestic conference
31 May 2015 - 引抜き加工における潤滑剤挙動を対象とする有限要素法と数値流体力学の連成解析
久保木 孝; 堀越 祐樹
Oral presentation, Japanese, 平成27年度塑性加工春季講演会講演論文集, 日本塑性加工学会, 横浜市, Domestic conference
31 May 2015 - 薄肉銅管の回転引き曲げ加工においてマンドレル位置が断面形状としわ・割れに及ぼす影響
王 広輝; 久保木 孝; 渡辺 雅人; 土屋 昭則
Oral presentation, Japanese, 平成27年度塑性加工春季講演会講演論文集, 日本塑性加工学会, 横浜市, Domestic conference
30 May 2015 - 内面に突起を有する円管の押出し加工におけるベアリング内面溝数の影響
八木田 太郎; 久保木 孝; 村田 眞
Oral presentation, Japanese, 第65回塑性加工連合講演会講演論文集, 日本塑性加工学会, Domestic conference
13 Oct. 2014 - Method of reducing redisual stress generated by thermal cutting of sheet metal attendat upon material property
Atsushi Maeda; Takashi Kuboki; Yingjun Jin
Oral presentation, English, The Proc. of the 64th Japanese joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, 岡山市, Domestic conference
12 Oct. 2014 - The effect of ditch-engrabed die in deep drawing with high-pressured water jet
Yuki Horikoshi; Takashi. Kuboki; Makoto Murata; Kazumi Matsui; Makoto Tsubokura
Oral presentation, English, The Proc. of the 64th Japanese joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Okayama city, Domestic conference
12 Oct. 2014 - Lubrication behavior of deep drawing with high pressured water
T. Kuboki
Oral presentation, English, CIRP, General Assembly, STC-F Technical presentation, International conference
29 Aug. 2014 - 巻線断面に高矩形比を持つコイルばねの成形および性能
坪内 翼; 久保木 孝
Oral presentation, Japanese, 平成26年度塑性加工春季講演会, 日本塑性加工学会, つくば市, Domestic conference
07 Jun. 2014 - 内面に突起を有する円管の押出し加工
村田 眞; 八木田 太郎; 久保木 孝
Oral presentation, Japanese, 平成26年度塑性加工春季講演会, 日本塑性加工学会, つくば市, Domestic conference
07 Jun. 2014 - 内面に突起を有する円管の押出し加工におけるベアリング長さの影響
八木田 太郎; 久保木 孝; 村田 眞
Oral presentation, Japanese, 平成26年度塑性加工春季講演会, 日本塑性加工学会, つくば市, Domestic conference
07 Jun. 2014 - Introduction and perspectives of closed-loop control in precise sheet-metal bending
T. Kuboki; Y. Jin
Oral presentation, English, CIRP, Winter meeting, STC-F, Technical presentation, International conference
23 Jan. 2014 - 厚板のV曲げ加工において生じる不良現象
ハムタ ナランバータル; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 第64回塑性加工連合講演会, 日本塑性加工学会, 大阪, Domestic conference
01 Nov. 2013 - せん断角度が複合材の切断面性状に及ぼす影響
佐藤 駿; 久保木 孝
Oral presentation, Japanese, 第64回塑性加工連合講演会, 日本塑性加工学会, 大阪, Domestic conference
01 Nov. 2013 - Micro-Incremental In-Plane Bending Utilizing Small Punch Tool
Armad Azrie; Takashi Kuboki
Oral presentation, English, 第64回塑性加工連合講演会, 日本塑性加工学会, 大阪, Domestic conference
01 Nov. 2013 - 時効現象を考慮した棒線材の変形解析手法
久保木 孝
Oral presentation, Japanese, 日本塑性加工学会,平成25年度塑性加工春季講演会, 名古屋市
Jun. 2013 - 逃げ有りダイス口絞り加工におけるダイス半角条件の有限要素法解析による評価
阿部 光将; 久保木 孝
Oral presentation, Japanese, 日本塑性加工学会,平成25年度塑性加工春季講演会
Jun. 2013 - 高圧水深絞り加工法における水膜挙動のReynolds方程式による評価
堀越 祐樹; 久保木 孝; 村田 眞; 坪倉 誠; 松井 和己
Oral presentation, Japanese, 日本塑性加工学会,平成25年度塑性加工春季講演会
Jun. 2013 - 有限要素法を用いたV曲げ加工における曲げ角度の予測精度
KHAMT NARANBAATAR; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,平成25年度塑性加工春季講演会
Jun. 2013 - 厚板のV曲げ加工における精度向上
ハムタ ナランバータル; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,第63回塑性加工連合講演会, 北九州市
Nov. 2012 - 円管内壁に捩じられた突起を有する押出加工における捩じり角の影響
村田 眞; 久保木 孝; 山崎 弘之
Oral presentation, Japanese, 日本塑性加工学会,第63回塑性加工連合講演会
Nov. 2012 - 鋼管ロータリ矯正の３次元解析
黒田 浩一; 大田尾 修治; 奥井 達也; 久保木 孝; 黄 河
Oral presentation, Japanese, 日本塑性加工学会,第63回塑性加工連合講演会
Nov. 2012 - 鋼管ロータリ矯正におけるロールマーク発生メカニズムの検討
大田尾 修治; 黒田 浩一; 山川 富夫; 奥井 達也; 久保木 孝
Oral presentation, Japanese, 日本塑性加工学会,第63回塑性加工連合講演会
Nov. 2012 - 圧延された銅板の機械特性変化の予測
久保木 孝; 松本 亨; 金 英俊; 寺田 賢二郎
Oral presentation, Japanese, 日本塑性加工学会,第63回塑性加工連合講演会
Nov. 2012 - せん断加工条件が複合材の切断面性状に及ぼす影響
佐藤 駿; 久保木 孝
Oral presentation, Japanese, 日本塑性加工学会,第63回塑性加工連合講演会
Nov. 2012 - 高圧水を用いた深絞り加工における潤滑特性の検討
斉藤 弘; 久保木 孝; 村田 眞; 坪倉 誠; 松井 和己
Oral presentation, Japanese, 日本塑性加工学会,平成24年度塑性加工春季講演会
Jun. 2012 - 電縫管の均等曲げにおける変形挙動
髙橋 和仁; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成24年度塑性加工春季講演会
Jun. 2012 - 逃げ有りダイスを用いた口絞り加工におけるダイス半角および接触角度の影響
阿部 光将; 久保木 孝
Oral presentation, Japanese, 日本塑性加工学会,平成24年度塑性加工春季講演会
Jun. 2012 - マイクロ遂次打点曲げ加工におけるパンチ先端角度の影響
Ahmad Azrie; 久保木 孝
Oral presentation, Japanese, 日本塑性加工学会,平成24年度塑性加工春季講演会
Jun. 2012 - 厚板のＶ曲げ加工とＬ曲げ加工における変形形状の比較検討
ハムタ ナランバータル; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,平成24年度塑性加工春季講演会
Jun. 2012 - 押出し加工による内面壁に捻られた突起を付けた円管の突起数の影響
村田 眞; 稲川 雄貴; 久保木 孝; 山崎 弘之
Oral presentation, Japanese, 日本塑性加工学会,平成24年度塑性加工春季講演会
Jun. 2012 - 板材のせん断加工における切断特性の解析および実験的検討
路 大涛; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - 鋼板のレーザ切断における加工変質層および残留応力特性
村上 祐一; 久保木 孝; 伊藤 敬; 金 英俊
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - ダイス曲げ半径に応じた側面圧縮ダイスにおける圧縮量の適正化
髙橋 和仁; 山口 康大; 久保木 孝; 村田 眞
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - 内面にスパイラルの突起を持つ円管の押出加工
村田 眞; 小林 雅志; 稲川 雄貴; 久保木 孝
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - V曲げ加工における厚板の変形形状に及ぼす板幅の影響
ハムタ ナランバータル; 久保木 孝; 村田 眞; 金 英俊
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - Ｌ曲げ加工を用いた板材の高精度曲げ加工
村田 眞; ハムタ ナランバータル; 金 英俊; 久保木 孝
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - 薄板のＬ曲げ加工における曲げ半径の影響
林 洪らん; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - 銅板の機械特性に及ぼす圧延圧下率の影響
松本 亨; 久保木 孝; 金 英俊
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - 極薄板の逐次打点曲げ加工
濱 智史; 久保木 孝
Oral presentation, Japanese, 第62回塑性加工連合講演会講演論文集/日本塑性加工学会,第62回塑性加工連合講演会
Oct. 2011 - 有限要素法を用いたマイクロチューブにおけるプラグ形状の選定
森脇 勇介; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演会講演論文集
Jun. 2011 - 側面圧縮を付与した回転引曲げ加工における5056アルミニウム合金円管のへん平抑制
高橋和仁; 平塚友望; 久保木孝; 村田眞; 矢野功造
Oral presentation, Japanese, 軽金属学会,軽金属学会第119回秋期大会講演概要
Nov. 2010 - 1050板の新しいせん断加工と従来のせん断加工との加工力の比較
路大涛; 村田眞; 久保木孝; 金英俊
Oral presentation, Japanese, 軽金属学会,軽金属学会第119回秋期大会講演概要
Nov. 2010 - 5083アルミニウム合金厚板の突き曲げに関する研究
ハムタ・ナランバータル; 村田眞; 久保木孝; 柴田隆造; 金英俊
Oral presentation, Japanese, 軽金属学会,軽金属学会第119回秋期大会講演概要
Nov. 2010 - 管の矯正加工における断面の変形挙動
黄 河; 久保木 孝; 村田 眞
Oral presentation, Japanese, 第61回塑性加工連合講演会講演論文集/日本塑性加工学会,第61回塑性加工連合講演会/日本塑性加工学会
Oct. 2010 - 凹型ロールを用いた伸線加工における被加工材の機械的特性
青木 一充; 久保木 孝; 村田 眞
Oral presentation, Japanese, 第61回塑性加工連合講演会講演論文集/日本塑性加工学会,第61回塑性加工連合講演会
Oct. 2010 - 穴のあいたリブを有する管の押出し接合における材料流動
諸井 努; 久保木 孝; 村田 眞
Oral presentation, Japanese, 第61回塑性加工連合講演会講演論文集/日本塑性加工学会,第61回塑性加工連合講演会
Oct. 2010 - バウシンガー効果を考慮した板曲げスプリングバック予測に関する研究
後藤 慎太郎; 久保木 孝; 村田 眞; 金 英俊
Oral presentation, Japanese, 第61回塑性加工連合講演会講演論文集/日本塑性加工学会,第61回塑性加工連合講演会
Oct. 2010 - 極薄肉大径長尺管成形用スピニング装置の開発 -第二報 成形品形状に及ぼす成形要因の解析-
石田 啓輔; 守屋 進; 三田 和彦; 松田 清義; 佐久間 優; 村田 眞; 久保木 孝
Oral presentation, Japanese, 第61回塑性加工連合講演会講演論文集/日本塑性加工学会,第61回塑性加工連合講演会
Oct. 2010 - 管とリブの押出し接合における管肉厚とガイド位置が加工後の接合強度と成形品形状に及ぼす影響
諸井 努; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,第41回塑性加工春季講演会
May 2010 - 板材の新しいせん断加工における加工力について
路 大涛; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, English, 本塑性加工学会,日第41回塑性加工春季講演会
May 2010 - 極薄肉大径長尺管成形用スピニング装置の開発（第一報 動特性計測による成形条件の最適化）
三田 和彦; 守屋 進; 石田 啓輔; 佐久間 優; 村田 眞; 久保木 孝; 高橋 奈生人
Oral presentation, Japanese, 日本塑性加工学会,第41回塑性加工春季講演会
May 2010 - 側面圧縮における円管のへん平抑制
高橋 和仁; 久保木 孝; 村田 眞; 矢野 功造
Oral presentation, Japanese, 日本塑性加工学会,第41回塑性加工春季講演会
May 2010 - 加工履歴を有する金属材料の機械特性予測に関する研究
小栗 潤一; 村田 眞; 久保木 孝; 黒田 浩一; 寺田 賢二郎
Oral presentation, Japanese, 日本塑性加工学会,第41回塑性加工春季講演会
May 2010 - V曲げ加工における5083厚板の形状精度に及ぼす曲げ型仕様の影響
ハムタ ナランバータル; 村田 眞; 久保木 孝; 柴田 隆浩; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,第41回塑性加工春季講演会
May 2010 - 1100板の新しいせん断加工におけるクリアランスの影響
路 大涛; 田中彰典; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 軽金属学会,第117回秋期大会
Nov. 2009 - 5083厚板のＶ曲げ加工における変形特性
ハムタ ナランバータル; 村田 眞; 久保木 孝; 柴田 隆浩; 金 英俊
Oral presentation, Japanese, 軽金属学会,第117回秋期大会
Nov. 2009 - 均等曲げにおける6063アルミニウム合金円管の変形挙動
高橋 和仁; 久保木 孝; 村田 眞
Oral presentation, Japanese, 軽金属学会,第117回秋期大会
Nov. 2009 - アルミニウム円管と穴あきリブの押出し接合におけるリブ材質の影響
諸井 努; 久保木 孝; 村田 眞
Oral presentation, Japanese, 軽金属学会,第117回秋期大会
Nov. 2009 - 厚板のＶ曲げ加工における変形形状に及ぼす影響
ハムタ ナランバータル; 村田 眞; 久保木 孝; 柴田 隆浩; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,第60回塑性加工連合講演会
Oct. 2009 - 板材Ｖ曲げにおけるスプリングバックレス加工
柴田 隆浩; 金 英俊; 小山 純一; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,第60回塑性加工連合講演会
Oct. 2009 - 薄肉管とリブの押出し接合における押出し比の影響
諸井 努; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,第60回塑性加工連合講演会
Oct. 2009 - 板材の新しいせん断加工における切り口面について
路 大涛; 田中彰典; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,第60回塑性加工連合講演会
Oct. 2009 - 軸押力を付与した回転引曲げ加工における円管の肉厚変化が加工精度に与える影響
高橋 和仁; 久保木 孝; 村田 眞; 矢野 巧造
Oral presentation, Japanese, 日本塑性加工学会,第60回塑性加工連合講演会
Oct. 2009 - バウシンガー効果を考慮した板曲げ時のスプリングバック予測
後藤 慎太郎; 村田 眞; 久保木 孝; 石上 圭介; 金 英俊; 小俣 均
Oral presentation, Japanese, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - 内面に溝を有する管材の口絞り加工
天野 達也; 久保木 孝; 村田 眞; 奥井 達也
Oral presentation, Japanese, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - 鋼板の新しいせん断加工における工具クリアランスの影響
田中 彰典; 路 大涛; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - 線材の径が凹ロール伸線加工法に及ぼす影響 －第２報－
仙崎 泰慎; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - アルミニウム1070において前段変形履歴が機械特性に及ぼす影響
小栗 潤一; 村田 眞; 久保木 孝; 鶴田 浩基
Oral presentation, English, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - 局部的な熱影響を受けた炭素鋼の残留応力解析
伊藤 敬; 村田 眞; 久保木 孝; 金 英俊; 李 若涛
Oral presentation, Japanese, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - 薄肉管とリブの押出し接合における接合強度
諸井 努; 久保木 孝; 村田 眞
Oral presentation, English, 日本塑性加工学会,平成21年度塑性加工春季講演会
May 2009 - 5083厚板のＶ曲げにおける変形挙動
N.Khamt; 村田 眞; 久保木孝; 金 英俊; 柴田隆浩
Oral presentation, English, 軽金属学会
May 2009 - アルミニウム円管と穴あきリブの押出し接合において管肉厚が成形品形状に及ぼす影響
諸井 努; 久保木孝; 村田 眞
Oral presentation, English, 軽金属学会,第116回春期大会
May 2009 - 1100板の新しいせん断加工における厚さの影響
路 大涛; 田中彰典; 金 英俊; 久保木孝; 村田 眞
Oral presentation, English, 軽金属学会,第116回春期大会
May 2009 - 曲げ荷重がボトミング加工の曲げ角度精度に及ぼす影響
柴田 隆浩; 金 英俊; 小山 純一; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - L曲げ加工におけるパンチの軌跡の影響（第2報）
金 英俊; 小山 純一; 今井 一成; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - アルミニウム円管と穴あきリブの押出し接合における管肉厚の影響
諸井 努; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 均等曲げによる円管の肉厚が断面変形に与える影響
高橋 和仁; 牟田 良輔; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 管材の肉厚が逃げ有りダイスを用いた口絞り加工に与える影響
小南 敦嗣; 村田 眞; 久保木 孝
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - しごきスピニング加工における極薄肉管の成形特性
高橋 奈生人; 久保木 孝; 村田 眞; 松田 清義; 三田 和彦
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 鋼板の新しいせん断加工における板厚の影響
田中 彰典; 村田 眞; 久保木 孝; 金 英俊
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 据え込み加工における時効硬化の影響
楊 陽; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 張出し加工における荷重線図を用いた応力－ひずみ線図の予測
森川 雄一; 小山 純一; 金 英俊; 尾形 敦; 村田 眞; 久保木 孝
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 引張圧縮試験における圧縮時の座屈対策を施した試験片形状の影響 -第２報-
石上 圭介; 久保木 孝; 村田 眞; 金 英俊; 小俣 均; 山谷 泰司
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 炭酸ガスレーザ切断後の鋼板の特性
李 若涛; 金 英俊; 小山 純一; 石黒 宏明; 村田 真; 久保木 孝
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 加工履歴を有するアルミニウム材の機械特性の予測法
鶴田 浩基; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 線材の径が凹型ロールを用いた伸線加工法に及ぼす影響
仙崎 泰慎; 久保木 孝; 村田 眞
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 管の矯正加工における断面形状の変化
山口 洋平; 天野 達也; 久保木 孝; 村田 眞; 山川 富夫; 黒田 浩一
Oral presentation, Japanese, 塑性加工学会,第59回塑性加工連合講演会
Nov. 2008 - 1100アルミニウム板材の新しいせん断加工における板厚の影響
村田眞; 久保木孝; 田中彰典; 金英俊
Oral presentation, Japanese, 軽金属学会,平成20年度軽金属学会 第115回秋期大会
Nov. 2008 - 塑性加工と強度
久保木 孝
Others, Japanese, 第14期非線形CAE勉強会, 非線形CAE協会
Nov. 2008 - 凹ロールを用いたフリーサイズ伸線加工法の提案
久保木 孝; 中村 友彦; 菅原 弘匡; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
Jun. 2008 - 板材の新しいせん断加工
村田 眞; 久保木 孝; 金 英俊; 田中 彰典
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - 引張圧縮試験における試験片形状の検討
石上 圭介; 久保木 孝; 村田 眞; 金 英俊; 小俣 均; 山谷 泰司
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - 1050アルミニウムのリブ接合押出しにおける温度の影響
諸井 努; 久保木 孝; 仙崎 泰慎; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - 逃げ有りダイスの接触面数がA1050円管の口絞りに与える影響
小南 敦嗣; 大出 佑亮; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - 均等曲げによる管の断面変形に関する研究
田中 彰典; 高橋 和仁; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - 回転引曲げ加工の軸押し力によるへん平化の抑制
高橋 和仁; 紀頭 航; 久保木 孝; 村田 眞; 小野 数彦; 矢野 巧造
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - L曲げ加工におけるパンチの軌跡の影響
金 英俊; 小山 純一; 今井 一成; 久保木 孝; 村田 眞
Oral presentation, Japanese, 日本塑性加工学会,平成20年度(第39回)塑性加工春季講演会
May 2008 - 「NAGOYA TUBE 2007とその研究開発トピックス」
久保木 孝
Oral presentation, Japanese, 塑性加工学会 チューブフォーミング分科会 第117回研究会
Mar. 2008 - 張り出し加工における荷重線図を用いた応力－ひずみ曲線の予測
小山純一; 金英俊; 村田眞; 久保木孝; 森川雄一
Oral presentation, Japanese, 日本塑性加工学会,第５８回塑性加工連合講演会
Oct. 2007 - リブ接合押出しの変形特性の数値解析
諸井努; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,第５８回塑性加工連合講演会
Oct. 2007 - 円管のプレス曲げにおける加工硬化指数の影響
村田眞; 久保木孝; 金英俊; モハマド グダルディ
Oral presentation, Japanese, 日本塑性加工学会,第５８回塑性加工連合講演会
Oct. 2007 - 口絞り成形品の機械特性の予測方法
鶴田浩基; 久保木孝; 村田眞; 永瀬豊; 高部秀樹; 黒田浩一; 秋山雅義
Oral presentation, English, 日本塑性加工学会,第５８塑性加工連合講演会
Oct. 2007 - オーバルダイスの形状が円管の回転口絞り加工における成形形状に及ぼす影響
大出佑亮; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,第５８塑性加工連合講演会
Oct. 2007 - 回転引曲げ加工の軸押し力が曲げ品質に与える影響
高橋和仁; 渡邊峻士; 久保木孝; 村田眞; 小野数彦; 矢野巧造
Oral presentation, Japanese, 日本塑性加工学会,第５８塑性加工連合講演会
Oct. 2007 - リブ接合押出しにおいて，管肉厚がメタルフローに及ぼす影響
諸井努; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,平成19年度塑性加工春季講演会
May 2007 - 円管の回転口絞り加工においてダイス形状が加工限界に及ぼす影響
大出佑亮; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,平成19年度塑性加工春季講演会
May 2007 - スキンパス法による薄肉円管の残留応力低減
久保木孝; 山下弘高; 榊友広; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,平成19年度塑性加工春季講演会
May 2007 - 中炭素鋼のパーライト形態を考慮した時効進行の予測法に関する研究
楊陽; 三宅章生; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,平成19年度塑性加工春季講演会
May 2007 - 打ち抜き加工による応力ひずみ曲線の予測
森川雄一; 金英俊; 小山純一; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,平成19年度塑性加工春季講演会
May 2007 - 非軸対称ダイスによる円管の回転口絞り加工
久保木 孝; 大出 佑亮; 村田 眞
Oral presentation, Japanese, 第114 回チューブフォーミング分科会研究例会
Mar. 2007 - 心金引きにおける残留応力抑制
榊友広; 山下弘高; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会 伸線技術分科会,第62回伸線技術分科会研究会
Nov. 2006 - リブ接合押出し法に置いてマンドレル形状がメタルフローに及ぼす影響
諸井努; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Oct. 2006 - 引張り曲げ加工における断面形状の変化
高橋和仁; 松下陽亮; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Oct. 2006 - ケブラー線とアルミニウムによる複合材料の機械的性質
植松俊一; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Oct. 2006 - 回転口絞り加工において円管とダイスの接触面積が加工限界に及ぼす影響
大出佑亮; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Oct. 2006 - ﾐｸﾛ組織を考慮した中炭素鋼の冷間加工におけるひずみ時効進行を予測する方法の提案
三宅章生; 高田恵美; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会 伸線技術分科会,第61回伸線技術分科会研究集会
Jun. 2006 - Influence of Material Properties on Shear Bending Process of Circular Tubes
グダラズィ モハマド; 久保木孝; 村田眞
Oral presentation, English, 日本塑性加工学会
May 2006 - 非軸対称ダイスを用いた円管の口絞り加工
大出佑亮; 木村康彦; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工学会春季講演会
May 2006 - アルミニウムとステンレス線による複合材料の機械的性質
植松俊一; 村田眞; 久保木孝
Oral presentation, Japanese, 塑性加工学会春季講演会
May 2006 - 逐次打点曲げにおける曲げ半径の算出
金英俊; 山田拓夫; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工学会春季講演会
May 2006 - 可変曲げ半径ダイスを用いた管材の引張曲げの加工特性
高橋和仁; 松下亮介; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工学会春季講演会
May 2006 - 穴のあいたリブを有する円管の製作
諸井努; 高岡大和; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工学会春季講演会
May 2006 - 管のプラグ引きにおける残留応力抑制方法
榊友広; 西田圭吾; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工学会春季講演会
May 2006 - The Effect of Tube Thickness on the Shear Bending Processs of Circular Tubes
グダラズィ モハマド; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2005 - 口絞りにおいて加工条件が加工限界におよぼす影響
久保木孝; 村田眞; 木村康彦
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2005 - 逐次打点法によるアングル材の曲げにおけるウェブ高さの影響
山田拓央; 金英俊; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2005 - 逐次打点法による平板面内曲げに及ぼすパンチの打撃角度の影響
金英俊; 山田拓央; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2005 - 有限要素法による円管のＭＯＳ曲げ加工特性
村田眞; 高橋和仁; 久保木孝; 金英俊
Oral presentation, Japanese, 日本鉄鋼協会,第150回秋季講演大会
Sep. 2005 - 非対称ダイスを用いた円管の口絞り加工
木村康彦; 村田眞; 久保木孝
Oral presentation, Japanese, 日本機械学会,２００５年度年次大会
Sep. 2005 - マグネシウム管のスピニングによる縮管
村田眞; 久保木孝
Oral presentation, English, 日本機械学会,２００５年度年次大会
Sep. 2005 - 円管のせん断曲げ加工
モハマド・グッダルジィ; 久保木孝; 村田眞
Oral presentation, Japanese, 日本機械学会,２００５年度年次大会
Sep. 2005 - 管の引抜き加工における残留応力抑制法
久保木孝; 榊友広; 村田眞
Oral presentation, Japanese, 日本機械学会,２００５年度年次大会
Sep. 2005 - 棒線材の２ロール矯正加工
佐々木哲也; 久保木孝; 村田眞
Oral presentation, Japanese, 日本機械学会,２００５年度年次大会
Sep. 2005 - テーパマンドレルを用いた偏肉厚押出し加工の有限要素シミュレーション
牧山高大; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演会
May 2005 - The Effect of Die Corner Radius on the Shear Bending Process of Circular Tubes
グダラズィ モハマド; 松下陽亮; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演会
May 2005 - アングル材の逐次打点曲げにおける押込み量の影響
金英俊; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演会
May 2005 - 逐次打点法によるアングル材の曲げにおける打撃ピッチの影響
山田拓央; 金英俊; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演会
May 2005 - 面内逐次打点曲げ加工において平板材質が加工特性に及ぼす影響
金英俊; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2004 - テーパマンドレルとチョーク付きダイスを用いた円管の偏肉厚押出し加工
牧山高大; 高岡大和; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2004 - 円管のせん断曲げ加工の数値シミュレーション
グダラジィ モハマド; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2004 - 口絞り加工において加工条件が応力に及ぼす影響
木村康彦; 村田眞; 久保木孝; 下田健
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2004 - 正方形管のスピニング加工における経路の影響
荒生ひとみ; 開俊介; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2004 - ミクロ組織を考慮した中炭素鋼のひずみ時効進行の予測法
三宅章生; 高田恵美; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2004 - 矯正中の押込み量が真直性に及ぼす影響
佐々木哲也; 久保木孝; 村田眞
Oral presentation, Japanese, 塑性加工学会,塑性加工学会伸線技術分科会研究会
Jun. 2004 - 高圧水を用いた鋼鈑の深絞り
Makoto Murata; Takashi Kuboki; Hiroyuki Kudou
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演会
May 2004 - 平板の面内逐次打点曲げに及ぼすピッチの影響
金英俊; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工学会春季講演大会
May 2004 - 正方形管のスピニング加工特性
荒生ひとみ; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演大会
May 2004 - テーパ形状のマンドレルを用いた円管の偏肉厚押出し加工におけるダイス先端形状の影響
牧山高大; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演大会
May 2004 - 小さい曲げ半径での円管のせん断曲げ
グダラジィ モハマド; 久保木孝; 村田眞
Oral presentation, Japanese, 日本塑性加工学会,塑性加工春季講演大会
May 2004 - 平板の面内逐次打点曲げにおける押込み量の影響
金英俊; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,添え以下鋼連合講演会
Nov. 2003 - 連続伸線における低角度ダイス適用によるボイド抑制効果
久保木孝; 根石豊; 秋山雅義
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2003 - テーパ上のマンドレルを用いた円管の偏肉押出し加工におけるダイス形状の影響
牧山高大; 村田眞; 久保木孝
Oral presentation, Japanese, 日本塑性加工学会,塑性加工連合講演会
Nov. 2003 - 高圧水を利用した冷延鋼板による深絞り加工
工藤寛之; 久保木孝; 村田眞
Oral presentation, Japanese, 塑性加工春季講演会論文集
May 2003 - 熱間ローラによるマグネシウム合金管材のスピニングにおける加工限界
横田靖央; 久保木孝; 村田眞
Oral presentation, Japanese, 塑性加工春季講演会論文集
May 2003 - 平板の面内逐次打点曲げにおける打撃角度の影響
金英俊; 久保木孝; 村田眞
Oral presentation, Japanese, 塑性加工春季講演会論文集
May 2003 - Levelling Effect of Residual Stress by an Ultra-light Reduction at the Final Stage of Bar Drawing Process
Takashi Kuboki
Others, English, Asia Youth Forum on Advanced Manufacturing in Japan, Asia Youth Forum on Advanced Manufacturing in Japan
Mar. 2003 - 硬度を指標とする冷間鍛造割れ予測
久保木孝
Invited oral presentation, Japanese, 塑性加工学会鍛造分科会, 塑性加工学会鍛造分科会
Jun. 2002 - 硬度を指標とする冷間鍛造割れ予測
久保木孝
Invited oral presentation, Japanese, 塑性加工学会鍛造分科会
Jun. 2002 - 冷間圧縮加工時の割れ発生予測式
渡部了; 春畑美文; 久保木孝; 根石豊
Oral presentation, Japanese, 第52回塑性加工連合講演会
Nov. 2001 - 矯正条件が材料の真直性に及ぼす影響
久保木孝; 阿部正昭; 秋山雅義
Oral presentation, Japanese, 日本鉄鋼協会第142回秋季講演大会
Oct. 2001 - 入側素材の曲率が引抜き後の材料真直性に及ぼす影響
久保木孝; 古田治弘; 黒田浩一
Oral presentation, Japanese, 日本鉄鋼協会第142回秋季講演大会
Oct. 2001 - 冷間加工時の割れ発生限界に及ぼす予ひずみの影響(冷間鍛造性評価技術-2)
渡部了; 根石豊; 久保木孝
Oral presentation, Japanese, 日本鉄鋼協会第142回秋季講演大会
Oct. 2001 - 冷間押出しにおける内部割れ発生に及ぼす加工条件の影響
黒田浩一; 久保木孝; 古田治弘; 渡部了
Oral presentation, Japanese, 日本鉄鋼協会第142回秋季講演大会
Oct. 2001 - 鋼の微視構造に起因した巨視的力学挙動に関する考察
松井和己; 及川兼司; 寺田賢二郎; 秋山雅義; 久保木孝
Oral presentation, Japanese, 日本機械学会材料力学部門講演会講演論文集
Sep. 2001 - 鋼の微視的構造に起因する巨視的弾塑性特性に関する考察
及川兼司; 松井和己; 寺田賢二郎; 秋山雅義; 久保木孝
Oral presentation, Japanese, 計算工学講演論文集
May 2001 - 入側素材の曲率が引抜き後の材料真直性に及ぼす影響
古田治弘; 吉川肇; 久保木孝
Oral presentation, Japanese, 日本金属学会九州支部・日本鉄鋼協会九州支部共催
Mar. 2001 - 引抜き材の非軸対称切削時の曲がり抑制に関する検討
渡部了; 阿部正昭; 久保木孝
Oral presentation, Japanese, 第51回塑性加工連合講演会
Nov. 2000 - 管材のダイレスＵベンド法の開発
久保木孝
Invited oral presentation, Japanese, 塑性加工学会チューブフォーミング分科会, 塑性加工学会チューブフォーミング分科会
Oct. 1998 - 管材のダイレスＵベンド法の開発
久保木孝
Invited oral presentation, Japanese, 塑性加工学会チューブフォーミング分科会
Oct. 1998 - 管材のダイレスＵベンド法の開発, 塑性加工春季講演会
久保木孝; 古堅宗勝; 逢阪慎一郎; 小野秀敏
Oral presentation, Japanese, 塑性加工春季講演会
May 1998 - 剛塑性ＦＥＭを用いた条鋼のタンデム圧延の数値解析, 塑性加工春季講演会
久保木孝; 黒田浩一; 本田英二
Oral presentation, Japanese, 塑性加工春季講演会
May 1997 - Siのワイヤソー連続切断におけるウエハ厚さ変動とその抑制方法の検討
久保木孝; 小嶋正康
Oral presentation, Japanese, 精密工学会秋季大会学術講演会
Sep. 1994 - 石英のワイヤソー連続切断におけるウエハ厚さ精度
久保木孝; 小嶋正康
Oral presentation, Japanese, 精密工学会秋季大会学術講演会
Sep. 1993 - 石英の一方向マルチワイヤソー切断における切断荷重(第二報)
久保木孝; 小嶋正康
Oral presentation, Japanese, 精密工学会春季大会学術講演会
Mar. 1993 - 石英の一方向マルチワイヤソー切断における切断荷重
久保木孝; 小嶋正康
Oral presentation, Japanese, 精密工学会春季大会学術講演会
Mar. 1992
Courses
- Fundamentals of Mechanical Working
The University of Electro-Communications - 生産加工学基礎
電気通信大学 - Mechanics of Materials,Theory and Practice
The University of Electro-Communications - 材料力学および演習
電気通信大学 - Manufacturing Technology, Theory and Practice
The University of Electro-Communications - 加工学および演習
電気通信大学 - Numerical Analysis
The University of Electro-Communications - 数値解析
電気通信大学
Affiliated academic society
Research Themes
- Development of wood forming method with high hydrostatic pressure that achieves large deformation and high strength
梶川 翔平; 久保木 孝
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), 22K04773
01 Apr. 2022 - 31 Mar. 2025 - Circular Tube with Holed Rib by Extrusion
MURATA Makoto; KUBOKI Takashi
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), 穴付きリブを有する管を製造するための押出し加工機を試作し,押出加工の実験を行った.押出し加工の数値解析を行い,この加工法の特徴を明らかにした. 管材の成形において重要となる管肉厚が,本加工法において成形に与える影響について検討を加えた.部材を鉛とアルミニウムとした.管肉厚が薄くなると押出し比が増加し,接合に適したガイド位置が低くなる.薄肉薄においても加工条件を適正化することで厚肉管と同様に,接合強度の向上が確認できた.さらに,リブと管の接合強度についても実験的に調べ,最適値の検討を行った.管の形状を円形にしているが,ガイド位置等がこの断面形状に及ぼす影響とその理由について検討を行った.数値解析により薄肉化とガイド位置の変化による成形品への影響を調べ,リブの変形量を定量的に示した.このことによって,リブと管の接合強度や加工精度が最適となる加工条件を明らかにした., 19560721
2007 - 2009
Industrial Property Rights
- マニピュレータ
Patent right, 久保木 孝, 高橋 和仁, 坪内 翼, 特願2014-104266, Date applied: 20 May 2014, 特開2015-218849, Date announced: 07 Dec. 2015, 特許第6422148, Date issued: 26 Oct. 2018 - シート状ワークの切断方法及び装置
Patent right, 小山 純一, 金 英俊, 村田 眞, 久保木 孝, 特願2008-118703, Date applied: 30 Apr. 2008, 特開2009-269092, Date announced: 19 Nov. 2009, 特許5224892, Date issued: 22 Mar. 2013 - 管材製造装置、管材製造方法、および、管材
Patent right, 村田 眞, 久保木 孝, 諸井 努, 特願2011-112537, Date applied: 19 May 2011, 特開2012-240084, Date announced: 10 Dec. 2012 - 材料の応力歪関係予測方法、材料の加工方法および材料の応力歪関係予測装置
Patent right, 小山純一, 金 英俊, 久保木 孝, 村田 眞, 特願2007-299217, Date applied: 19 Nov. 2007, 特許5140388, Date issued: 12 Nov. 2012 - 曲げ加工装置および曲げ加工方法
Patent right, 特願2011-065926, Date applied: 24 Mar. 2011, 特開2012-200741, Date announced: 22 Oct. 2012 - 押出加工物の製造方法及び押出加工物
Patent right, 村田 眞, 久保木 孝, 牧山 高大, 特願2004-108602, Date applied: 04 Mar. 2004, 特許4324671, Date issued: 19 Jun. 2009 - 金属円管の口絞り加工方法および口絞り加工用ダイス
Patent right, 久保木 孝, 村田 眞, 木村 康彦, 特願2005-236781, Date applied: 17 Aug. 2005, 特許公開2007-050423, Date announced: 01 Mar. 2007
