Bachelor of Engineering, Kyoto Institute of Technology, Mar. 2011

Master of Engineering, Kyoto Institute of Technology, Mar. 2013

Doctor of Engineering, Kyoto Institute of Technology, Sep. 2015

Wood

Metal

Materials processing

Nanotechnology/Materials, Material fabrication and microstructure control

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Manufacturing and production engineering

Oct. 2020 - Present
The University of Electro-Communications, Department of Mechanical and Intelligent Systems Engineering, Graduate School of Informatics and Engineering, Associate professor, Japan

Apr. 2016 - Sep. 2020
The University of Electro-Communications, Department of Mechanical and Intelligent Systems Engineering, Graduate School of Informatics and Engineering, Assistant professor, Japan

Oct. 2015 - Mar. 2016
The University of Electro-Communications, Department of Mechanical Engineering and Intelligent Systems, Graduate School of Informatics and Engineering, Assistant professor, Japan

Apr. 2014 - Sep. 2015
Japan Society for the Promotion of Science, Research Fellowship for Young Scientist (DC2), Japan

Apr. 2013 - Sep. 2015
Kyoto Institute of Technology, Graduate School of Science and Technology, Engineering Design, Japan

Apr. 2011 - Mar. 2013
Kyoto Institute of Technology, Graduate School of Science and Technology, Mechanical and System Engineering, Japan

Apr. 2007 - Mar. 2011
Kyoto Institute of Technology, Graduate School of Science and Technology, Mechanical and System Engineering, Japan

Apr. 2004 - Mar. 2007
Hyogo Prefecutural Hyogo High School, Japan

Jun. 2024 - Present
庶務幹事, 日本塑性加工学会 チューブフォーミング分科会, Society

Apr. 2024 - Present
委員, 日本塑性加工学会 会報誌編集委員会

Apr. 2024 - Present
日本機械学会 機械材料・材料加工部門, 広報委員会 委員長

Jun. 2023 - Present
会計幹事, 日本塑性加工学会 伸線技術分科会, Society

Mar. 2023 - Present
幹事, 日本鉄鋼協会 創形創質工学部会 管工学フォーラム, Society

Apr. 2021 - Present
商議員, 日本塑性加工学会 東京・南関東支部, Society

Jul. 2019 - Present
幹事, 日本鉄鋼協会 創形創質工学部会 若手フォーラム, Society

Jun. 2021 - May 2024
講演会運営委員会委員, 日本塑性加工学会, Society

Apr. 2023 - Mar. 2024
広報委員会 副委員長, 日本機械学会 機械材料・材料加工部門, Society

Apr. 2022 - Mar. 2024
座長, 日本鉄鋼協会 創形創質工学部会 若手フォーラム, Society

01 Apr. 2020 - 31 Mar. 2021
新進部会担当幹事, 日本塑性加工学会 東京・南関東支部

01 Apr. 2019 - 31 Mar. 2021
広報委員会委員, 日本塑性加工学会

01 Apr. 2017 - 31 Mar. 2021
会報誌編集委員会委員, 日本塑性加工学会, Society

01 Apr. 2019 - 31 Mar. 2020
新進部会担当幹事・副, 日本塑性加工学会 東京・南関東支部

Dec. 2023
The Japan Society for Technology of Plasticity, 塑性加工学会は、塑性加工に関する研究発表、研究の連絡協力および促進を図り、もって塑性加工に関する学術上の進歩向上に寄与することを目的に研究発表会、講演会、講習会などを行っている。
本賞は、講演会への若手会員の積極的な参加と講演会の活性化を促進することを目的としている。対象は、講演発表時に満35歳以下の正会員および学生会員であり、今回は119件の応募があり、その中から13名に対して授与された。
Application of material-properties prediction method based on area reduction in drawing to spinner-straightening analysis
Best Paper Presentation Award in 74th Japanese Joint Conference for the Technology of Plasticity, Tetsuya Komatsu;Shohei Kajikawa;Shinsuke Inoue;Hiromichi Matsumura;Hikaru Seimiya;Takashi Kuboki
Japan society, Japan

Dec. 2023
The Japan Society for Technology of Plasticity, 塑性加工学会は、塑性加工に関する研究発表、研究の連絡協力および促進を図り、もって塑性加工に関する学術上の進歩向上に寄与することを目的に研究発表会、講演会、講習会などを行っている。
本賞は、講演会への若手会員の積極的な参加と講演会の活性化を促進することを目的としている。対象は、講演発表時に満35歳以下の正会員および学生会員であり、今回は119件の応募があり、その中から13名に対して授与された。
Fabrication of Containers by Forging with High-Density Wood
Best Paper Presentation Award in 74th Japanese Joint Conference for the Technology of Plasticity, Hinako Uejima;Takashi Kuboki;Shohei Kajikawa
Japan society, Japan

Jun. 2023
The Japan Society for Technology of Plasticity, 日本塑性加工学会は、塑性加工に関する研究発表、研究の連絡協力および促進を図り、もって塑性加工に関する学術上の進歩向上に寄与することを目的としている。
本賞は、塑性加工分野における学問または技術に関して発展性に富み、将来に活躍が期待される新進気鋭の個人に対して贈られる賞で、2023年は６名に対して授与された。
Development of high-pressure forming technology for wood-based materials inspired by metal forming
JSTP Young Researchers Award, Shohei Kajikawa
Japan

Jun. 2023
The Japan Society for Technology of Plasticity, 塑性加工学会は、塑性加工に関する研究発表、研究の連絡協力および促進を図り、もって塑性加工に関する学術上の進歩向上に寄与することを目的としている。
本賞は、日本塑性加工学会誌「塑性と加工」の第62巻第729号（2021年10月）から第64巻第752号（2023年９月）、およびMaterials TransactionsのVol.62, No.10（2021年10月）からVol.64, No.9（2023年９月）までに、本会の校閲を経て掲載された優れた論文に対して与えられる賞で、今回は３件に対し授与された。
Effect of Inclusions on Internal Fracture in Skew Rolling
JSTP Best Paper Award, Koji Yamane;Kazuhiro Shimoda;Koichi Kuroda;Shohei Kajikawa;Takashi Kuboki
Japan

Jan. 2023
The Japan Society for Technology of Plasticity, 日本塑性加工学会は，塑性加工に関する研究発表，研究の連絡協力および促進を図り，もって塑性加工に関する学術上の進歩向上に寄与することを目的に研究発表会，講演会，講習会などを行っている．
本賞は、セッションの座長を含む３名の審査委員が，内容、質疑応答およびプレゼンテーションなどの観点に基づいて審査し，講演発表時に35歳以下の者を対象としている．講演総数206件のうち129件が審査対象となり，12件が受賞となった．
Effect of contact angle on deformation behavior in rotary tube flaring with relieved punch
Best Paper Presentation Award in 73rd Japanese Joint Conference for the Technology of Plasticity, Shohei Kajikawa;Kazumasa Iizuka;Kiwamu Uchida;Takashi Kuboki

Apr. 2022
Tokyo-Minami Kanto Branch of JSTP, 塑性加工分野における技術に関して着実な進歩が見られ、将来に活躍が期待される新進気鋭の支部の正会員または賛助会員に所属する個人に与えられる賞。
Thermal flow molding of wood-based materials using only natural resources
Encouragement Award, Shohei Kajikawa
Japan society, Japan

Mar. 2021
The Japan Wood Research Society, 本学会は、学会誌や年次大会・研究会などを通して、木材に関する基礎および応用研究の推進と研究成果の社会への普及を行っている。今大会では、257件の口頭発表（内：学生優秀口頭発表賞の対象144件）があり、後藤さんは19件の入選のうちの1件となり、受賞となった。
Effect of heating temperature and time on flowability of wood powder combined with sucrose and citric acid
Best Presentation Award for Student in the 71st Annual Meeting of Japan Wood Research Society, Megumi Goto;Shohei Kajikawa;Takashi Kuboki
Japan society

Mar. 2020
JSTP Tube Forming Committee
Experimental Investigation of Tube Drawing Process with Diameter Expansion
Best Paper Presentation Award for Young Researchers in TUBEHYDRO2019, Shohei Kajikawa

May 2018
The Society of Materials Science, Japan
Development of forming technology by flow and self-adhesion for wood-based materials
Academic Encouragement Award, Shohei Kajikawa

Jan. 2018
JSMS Committee on Wood and Wood-Based Materials
Development of forming technology by flow and self-adhesion for wood-based materials
Achievement Award, Shohei Kajikawa

Jun. 2013
The Japan Society for Technology of Plasticity
Development of fundamental technology for forming complex shaped product from wood
JSTP Students Award, Shohei Kajikawa

Mar. 2013
The Japan Society of Mechanical Engineers
Miura Award, Shohei Kajikawa

Influence of mechanical properties of tube on forming limits and deformation characteristics in expansion drawing process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Last, Journal of Manufacturing Science and Engineering, ASME International, 146, 7, 071005, 25 Apr. 2024, Peer-reviwed, True, 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, English

Deep Container Fabrication by Forging with High- and Low-Density Wood
Hinako Uejima; Takashi Kuboki; Soichi Tanaka; Shohei Kajikawa
Last, Journal of Manufacturing and Materials Processing, MDPI, 8, 1, 30, 06 Feb. 2024, Peer-reviwed, True, 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
Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity, Lecture Notes in Mechanical Engineering, Springer Nature Switzerland, 307-316, 20 Sep. 2023, Peer-reviwed, True
In book

Stress Relief for Crack Prevention by Adding Holes to V-Bending Die
Ryunosuke Yakuno; Hiroki Suwa; Kazuhito Takahashi; Shohei Kajikawa; Yasunori Yusa; Takashi Kuboki
Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity, Lecture Notes in Mechanical Engineering, Springer Nature Switzerland, 348-358, 20 Sep. 2023, Peer-reviwed, True
In book

Square Tube Fabrication by Expansion Drawing of Circular Tube
Shohei Kajikawa; Yusuke Kato; Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama
Lead, Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity, Lecture Notes in Mechanical Engineering, Springer Nature Switzerland, 612-621, 23 Aug. 2023, Peer-reviwed, True
In book

Effect of Material on Strain Direction in Tube Expansion Drawing Process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Last, Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity, Lecture Notes in Mechanical Engineering, Springer Nature Switzerland, 594-602, 23 Aug. 2023, Peer-reviwed, True
In book

Effect of Tool Shape in Rotary Draw Bending of Thin-Walled Copper Tubes
Shohei KAJIKAWA; Masato ARAKI; Masato WATANABE; Hisatoshi TSUEOKA; Akinori TSUCHIYA; Takashi KUBOKI
Lead, 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

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
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, English

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
Last, Journal of the Japan Society for Technology of Plasticity, The Japan Society for Technology and Plasticity, 63, 743, 174-179, 25 Dec. 2022, Peer-reviwed
Scientific journal, Japanese

Feasibility study on application of spinner straightening to thick-walled tube
Tetsuya Komatsu; Shohei Kajikawa; Shinsuke Inoue; Matsumura Hiromichi; Hikaru Seimiya; Takashi Kuboki
Tubehydro 2022, 270-278, 16 Nov. 2022, Peer-reviwed
International conference proceedings, English

Cylindrical Tube Fabrication by Wood Forging
Hinako Uejima; Takashi Kuboki; Shohei Kajikawa
Last, Tubehydro 2022, 74-81, 16 Nov. 2022, Peer-reviwed
International conference proceedings, English

Circular tube fabrication by extrusion of wood powder with natural binder using cooled die
Megumi Goto; Yuya Suzumoto; Takashi Kuboki; Shohei Kajikawa
Last, Tubehydro 2022, 66-73, 16 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
Lead, 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 Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Last, Tubehydro 2022, 253-260, 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
Tubehydro 2022, 201-210, 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
Tubehydro 2022, 185-193, 15 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
Tubehydro 2022, 176-184, 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
Corresponding, Journal of the Society of Materials Science, Japan, The Society of Material Science Japan, 70, 12, 912-917, 15 Dec. 2021, Peer-reviwed
Scientific journal, Japanese

Development of Twisting Method of Sheet Metal using Taper Roll
Avanish Kumar; Takahiro Makiyama; Shohei Kajikawa; Takashi Kuboki
COMPLAS XVI, 541, 07 Sep. 2021
International conference proceedings, English

Fabrication of a ring groove on tube-inner surface by ironing from outer surface using displacement control of tube bottom end
Junki Ishino; Shohei Kajikawa; Akira Yamauchi; Akira Gunji; Katsuyuki Onishi; Takashi Kuboki
COMPLAS XVI, 552, 07 Sep. 2021
International conference proceedings, 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
Lead, COMPLAS XVI, 556, 07 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
CIRP Annals - Manufacturing Technology, Elsevier, 70, 1, 219-222, Aug. 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
Last, ICTP 2021, Minerals, Metals and Materials Series, 1043-1053, 25 Jul. 2021, Peer-reviwed
International conference proceedings, English

Fluidity of Wood Composite Combined with Natural Binder on Injection Molding
Shohei Kajikawa; Masaya Horikoshi; Takashi Kuboki; Soichi Tanaka; Kenji Umemura; Kozo Kanayama
Lead, ICTP 2021, Springer International Publishing, 2031-2040, 25 Jul. 2021, Peer-reviwed
International conference proceedings, English

Effect of Bending Intensity on Straightness in Spinner Straightener
Keiichiro Kawasaki; Shohei Kajikawa; Hiromichi Matumura; Tetushi Ono; Hikaru Seimiya; Takashi Kuboki
ICTP 2021, 2055-2065, 25 Jul. 2021, Peer-reviwed
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
Journal of Materials Processing Technology, Elsevier, 291, 116989, May 2021, Peer-reviwed
Scientific journal, English

Flange compression using stepped punch for forming extremely deep cup with flange from aluminum alloy sheet
Shohei Kajikawa; Takashi Kuboki; Takashi Iizuka
Lead, Journal of Materials Processing Technology, Elsevier, 288, 116835, Feb. 2021, Peer-reviwed, This paper presents a method of flange compression using a stepped punch and die for effective production of an extremely deep cup with a flange from sheet metal. The proposed method was composed of initial stretching and flange compression, and fracture was prevented during the flange compression as the blank elongates by only compressive force. Optimum forming parameters, which are stepped lengths of the punch and clearance between the punch and the die, were investigated by finite element analyses and experiments. It was possible to produce a deep cup with uniform side wall thickness, which length-to-diameter ratio was 2.00, by the optimization of the forming parameters. In addition, two-step forming, which uses two punches, was proposed for producing an extremely deep cup with a thinner side wall. As a result, the deep cup, which length-to-diameter ratio was 9.23, was obtained.
Scientific journal, English

Effect of Inclusions on Internal Fracture in Skew Rolling
Koji YAMANE; Kazuhiro SHIMODA; Koichi KURODA; Shohei KAJIKAWA; Takashi KUBOKI
Journal of Japan Society of Technology for Plasticity, 日本塑性加工学会, 62, 720, 1-7, 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
Lead, Metals, MDPI, 10, 12, 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
Metals, MDPI, 10, 12, 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
Lead, Journal of the Society of Materials Science, Japan, 日本材料学会, 69, 6, 15 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,
Shohei Kajikawa; Masaya Horikoshi; Takashi Kuboki; Soichi Tanaka; Kenji Umemura; Kozo Kanayama
Lead, 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
Tubehydro 2019, 138-144, 20 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
Lead, Tubehydro 2019, 67-74, 19 Nov. 2019, Peer-reviwed
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
Tubehydro 2019, 59-66, 19 Nov. 2019, Peer-reviwed
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
Lead, COMPLAS XV, 48-58, 03 Sep. 2019
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
COMPLAS XV, 21-30, 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
Takashi Kuboki; Daisuke Kusuda; Shohei Kajikawa; Takahiro Noguchi; Kazuaki Adachi
CIRP Annals - Manufacturing Technology, 68/1, 1, 301-304, 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

MECHANICAL PROPERTY AND FLAME RETARDANCY OF COMPOSITE MATERIAL PRODUCED FROM ALUMINUM HYDROXIDE SLUDGE AND POLYETHYLENE
Shohei Kajikawa; Takashi Iizuka; Toshio Takahata; Tsuneo Maki
Lead, IN-TECH 2018, 109-112, 05 Sep. 2018
International conference proceedings, English

Prevention of defects 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
Lead, 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
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
CIRP Annals, Elsevier USA, 67, 1, 305-308, 2018, Peer-reviwed, This paper presents a new extrusion method for fabrication of a tube with spiral inner fins. The spiral fins are formed by utilizing the generation of spiral outer fins or grooves, which drive the metal to circumferentially move with twist deformation. The effect of the outer fins/grooves is examined for realizing the circumferential metal flow. The position of the mandrel has an ability to flexibly control the spiral angle. This method would drastically enhance the productivity and reduce the manufacturing cost, as the tube would be manufactured directly from a billet through only one process.
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
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, SPRINGER LONDON LTD, 91, 5-8, 2635-2643, Jul. 2017, Peer-reviwed, This paper presents a new forming method of a coiled spring which is used as a forceps manipulator of a surgical robot. Joint parts of forceps manipulator are required to be "easy to bend and strong to twist". This demand is fulfilled by using coiled springs with high rectangular ratio in winding wire cross section. However, the coiled springs are conventionally expensive as they are fabricated by machining. This study proposed a new and inexpensive forming method for fabrication of the coiled spring with high rectangular ratio in the wire cross section. In this method, the coiled spring with circular shape in the winding wire cross section is compressed in the coil axial direction by upsetting, and then the rectangle ratio of the wire becomes high. The coiled spring with a high rectangular ratio of 3 was obtained by the proposed method. In addition, a numerical analysis and an experiment were conducted for evaluation of the formed coiled springs in terms of tensile, torsional, and bending characteristics. The formed coiled springs were easy to bend and strong to twist from results. Moreover, the elastic limit of the formed coiled springs improved due to work hardening by upsetting.
Scientific journal, 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
CIRP ANNALS-MANUFACTURING TECHNOLOGY, ELSEVIER SCIENCE BV, 66, 1, 277-280, 2017, Peer-reviwed, This paper presents a new method for fabrication of a ring/coil of in-plane bent sheet metal using a wire/tube as a raw material. The method conducts upset of a wire/tube bent by a coiling process. The coiling process bends a circular wire/tube into a ring/coil, and the upset process compresses it into a ring/coil with extremely flattened cross-section and small bending radius, which was difficult to obtain by conventional processes. The breadth-to-thickness ratio reached 6.0 and the outer radius-to-breadth ratio decreased to 1.7. When the method is applied for coils, the fabricated coils would be used as joints in a surgical manipulator. (C) 2017 Published by Elsevier Ltd on behalf of CIRP.
Scientific journal, English

EFFECT OF TOOL DESIGN ON FORMABILITY IN DEEP DRAWING BY APPLYING COMPRESSIVE FORCE ON FLANGE
Shohei Kajikawa; Takashi Kuboki; Takashi Iizuka
Lead, COMPUTATIONAL PLASTICITY XIV: FUNDAMENTALS AND APPLICATIONS, INT CENTER NUMERICAL METHODS ENGINEERING, 54-62, 2017, This paper presents a new deep drawing process which applies compressive force on a flange for forming a deep cup effectively. This method uses a punch with a convex and a die, and optimum tool design was investigated using the finite element method (FEM) in order to prevent the formation of defects. First, the effect of the punch configuration was investigated. As a result, a cup with a uniform side wall thickness was obtained under the condition that the punch convex length was greater than the blank thickness and the punch top corner radius was appropriate. It was possible to obtain the deep cups by decreasing the clearance between the punch convex and the die. However, dimensional accuracy decreased with the decrease in the clearance. Based on these results, two-steps process using a backward punch was proposed, and deep cups having high dimensional accuracy was formed successfully by this method.
International conference proceedings, English

EXAMINATION OF WORKING CONDITION FOR REDUCING THICKNESS VARIATION IN TUBE DRAWING WITH PLUG
Takashi Kuboki; Shunsuke Tasaka; Shohei Kajikawa
COMPUTATIONAL PLASTICITY XIV: FUNDAMENTALS AND APPLICATIONS, INT CENTER NUMERICAL METHODS ENGINEERING, 63-71, 2017, The present research carried out a series of analyses using the finite element method (FEM). The analyses investigated the effect of working condition on thickness variation after drawing a tube with initial thickness distribution. As a result, it was notably revealed that application of dies with small half angle below 5 degrees was prominently effective for levelling the thickness variation. This effect was strengthen by employing tubes with thicker walls and larger diameters. Moreover, the mechanism of levelling the thickness variation was also examined. The small die angle affects the contact length at die approach, and the contact length at thinnest side becomes longer than that at the thickest side. The difference of the contact lengths equalizes the thicknesses of the thinnest and thickest sides. The analyses also predicted the thickness variation should almost be zero under an optimum condition.
International conference proceedings, English

Molding of wood powder with a natural binder
Shohei Kajikawa; Masaya Horikoshi; Soichi Tanaka; Kenji Umemura; Kozo Kanayama
Lead, Procedia Engineering, 207, 113-118, 2017, Peer-reviwed, © 2017 The Authors. Published by Elsevier Ltd. This paper describes the molding of wood powder using sucrose as a natural binder, as a means of fabricating products based on natural resources. The conditions, such as the temperature and binder content of the wood powder, were optimized in order to produce compacts successfully in the molding process. In experiments, the plasticization temperature of sucrose was initially investigated by thermogravimetric/differential thermal analysis for the prediction of the thermal flow temperature of the wood powder combined with sucrose. In addition, flow behavior of the mixture was evaluated for the temperature and the binder content by capillary flow tests. Based on these data, molding test of wood powder with sucrose was conducted to evaluate the injection moldabilty. As a result, the plasticization point of sucrose was found to be approximately 176 °C, with a mass reduction onset at 200 °C due to decomposition to volatile products. Wood powder mixed with sucrose flowed at temperatures above 180 °C, although flow was restricted above 220 °C due to the effect of gases evolved from the sucrose. The minimum sucrose content required for flow was 30 wt% within the temperature range of 180 to 200 °C. The mixture was found to fill a mold under optimized conditions, forming compacts with good surface texture at a sucrose content of 30 wt% and 200 °C. This method allows the fabrication of products from naturally occurring materials with minimal environmental impact.
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
Procedia Engineering, Elsevier BV, 207, 1743-1748, 2017, Peer-reviwed
Scientific journal

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
Procedia Engineering, Elsevier BV, 207, 2364-2369, 2017, Peer-reviwed
Scientific journal

Fabrication of Deep Cup with Flange by In-Plane Stretch Forming Applying Compressive Force in Thickness Direction
Shohei Kajikawa; Takashi Iizuka; Takashi Kuboki
Lead, Key Engineering Materials, Trans Tech Publications, Ltd., 716, 897-906, Oct. 2016, This paper presents a new stretch forming method that applies compressive force for forming a deep cup with a flange. In this method, a punch and a die having a hole are used, and the main parameters are the depth of the die hole, d_dh, and the clearance between the punch and the die, c. The effect of d_dh and c was investigated by using an aluminum blank of thickness 2 mm in an experiment and a finite element analysis (FEA). When d_dh was too small, the material flow could not be controlled appropriately, and when d_dh was too large, a local thinning occurred during initial stretching into the die hole. When c was set at large, the side wall thickness of the formed cup was uneven, but a deep cup could be obtained by setting c below a half of the blank thickness. As a result, a deep cup of height 8.3 mm and with a flange was formed successfully under the condition that d_dh was 1.5 mm and c was 0.5 mm.
Scientific journal

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
Key Engineering Materials, Trans Tech Publications, Ltd., 716, 931-940, Oct. 2016, Peer-reviwed, This paper focuses upon zigzag-shape bending for suppression of defects, including dent and springback. A series of finite element analyses was carried out in order to optimize the bending condition for suppression of these defects. As a result, it was clarified that a diagonal movement of the upper die was effective for suppression of dents while a rather vertical movement of the upper die was effective for suppression of springback. In order to suppress dent and springback at the same time, this paper proposes another method of bending method, whereby the upper die with special shape moves in a diagonal way. Moreover, the stability of the method against variation of tool dead position, which would be caused by elastic deformation of supporting members, was studied by FEM, followed by experimental verification.
Scientific journal

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
The 9th Pacific Rim International Conference on Advanced Materials and Processing, 38-41, Aug. 2016
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
CIRP ANNALS-MANUFACTURING TECHNOLOGY, ELSEVIER SCIENCE BV, 65, 1, 277-280, 2016, Peer-reviwed, This paper presents an innovative rotary reduction method of elongated fine solid wires and hollow tubes, the diameters of which could be reduced to 0.02 times of diameter of rolls as the tool. A pair of concave rolls is positioned at a skew angle to the material axis, and the rolls compress the material. The material travels between the rolls in a spiral movement with tension applied on its ends. The method is applicable for a very wide range of diameters using the same tools. Diversified shapes would be fabricated as the method reduces the diameter at arbitrary axial positions. (C) 2016 CIRP.
Scientific journal, English

Effect of molding temperature on fluidity and injection moldability of oven-dry steam-treated bamboo powder
Shohei Kajikawa; Takahi Iizuka
Lead, JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, ELSEVIER SCIENCE SA, 225, 433-438, Nov. 2015, Peer-reviwed, The thermal fluidity and injection moldability of oven-dry steam-treated bamboo powder were investigated with control of the temperature. Thermal analysis, such as differential thermal analysis and thermogravimetry, indicated that the steamed powder underwent degradation at lower temperatures, and the weight loss of the steamed powder was larger than that for the untreated powder. Thermal flow tests of the steamed powder at several temperatures revealed the flow rate was high at 180 and 200 degrees C. Injection molding was attempted while controlling the temperature of the injection part and metal mold. It was possible to obtain products with a surface similar to plastic via injection molding and the range of metal mold temperature that resulted in a successfully molded product increased with the injection temperature. The four-point bending strength and Rockwell superficial hardness of the product increased with the mold temperature at each injection temperature. Both characteristics were high when the injection temperature was 180 degrees C, and the highest values obtained were 36 MPa and HR15w 78. Observation of the fracture part of the molded product confirmed that the fiber strength of the product molded at an injection temperature of 180 degrees C was maintained, while that molded at an injection temperature of 200 degrees C was not. (C) 2015 Elsevier B.V. All rights reserved.
Scientific journal, English

Effect of water-soluble components mass on the fluidity of the steam-treated bamboo powder caused by heating and compression
Shohei Kajikawa; Takashi Iizuka
Lead, Zairyo/Journal of the Society of Materials Science, Japan, Society of Materials Science Japan, 64, 5, 381-386, 01 May 2015, Peer-reviwed, In this study, the effect of water-soluble components on the thermal fluidity of steam-treated bamboo powder was investigated. Bamboo powders were steam-treated at 180 or 200 °C for various steam treatment times. The bamboo powders were then treated with hot water to extract the water-soluble components. The flow rates of steam-treated bamboo powders that were either treated with hot water or not treated were measured using a capillary rheometer. In addition, thermogravimetry (TG) was also used to examine the differences in the thermal characteristics of bamboo powder treated by hot water extraction. The experimental results indicated that the quantity of hot water extract varied with the steam treatment temperature and time. Flow tests showed that bamboo powders not treated with hot water flowed, whereas those treated with hot water did not flow. The flow behavior and flow rate of the untreated powder became stable and high with an increase in the steam treatment time for steam treatment at 180 °C. For steam treatment at 200 °C, the flow behavior was more stable, and the flow rate became the highest by short time steam treatment. TG measurement of the powders suggested that water-soluble contains many volatile components, and the amount of volatile components changed along with the denaturation of the water soluble components. From these results, it was confirmed that not only the quantity of the water-soluble components but also denaturation of the water soluble component affects the thermal fluidity of the steam-treated bamboo powder.
Scientific journal, Japanese

Effect of surface state of die on flow rate of steamed bamboo powder in thermal flow test using capillary rheometer
Shohei Kajikawa; Riku Sakagami; Takashi Iizuka
Lead, Key Engineering Materials, Trans Tech Publications Ltd, 651-653, 830-835, 2015, Peer-reviwed, Thermal flow tests were performed on steamed bamboo powder using capillaries that were processed under different conditions in order to investigate the effect of the die surface state on the fluidity of the woody powder. The capillaries were processed by wire-cut electric discharge machining, reaming or drilling, and the arithmetic average roughness (Ra) varied from 0.5 to 2.5 μm. The bamboo powder was first steamed at 200°C for 20 min, and its particle size was then controlled using different mesh screens. The thermal flow temperature was set at 200°C. The results indicated that the flow behavior improved with increasing particle size. For the capillaries processed by WEDM, the flow rate for samples with particle sizes of 75∼150 and 150∼300 μm decreased with increasing Ra. On the other hand, when reaming or drilling was used to process the capillaries, the flow rate was almost independent of Ra, regardless of the particle size.
International conference proceedings, English

Effect of Heating at Oven-Dry State on Steam Treated Bamboo Powder Thermal Fluidity
Shohei Kajikawa; Takashi Iizuka
Lead, Advances in Materials Science and Engineering, Hindawi Limited, 2015, 1-7, 2015, Peer-reviwed, In hot molding processes of woody material, it is important to understand the effect of oven-dry heating on the property of woody biomass material, such as thermal fluidity. In this study, thermal flow tests of untreated and steam treated bamboo powder were conducted to investigate the effects of heating at an oven-dry state on thermal fluidity. The test temperature was set to 200°C. Before the thermal flow test, powder was dry-heated in a capillary rheometer at 200°C with a variable heating time. Thermogravimetry was conducted to understand the thermal changes of the powder during an increasing temperature and constant temperature. Fluidity of untreated powder was improved with a short dry-heating but decreased with a long dry-heating. In contrast, steam treated powder fluidity was high compared to untreated one, but its fluidity did not improve from dry-heating. From these thermogravimetry results, the chemical changes associated with component volatilization relate with the thermal fluidity. Therefore, the decrease in fluidity from dry-heating occurred because fluidity related components escape from the powder through volatilization.
Scientific journal

Flowability of the steamed bamboo powder -Influence of steaming temperature and time on the flowability-
Shohei Kajikawa; Takashi Iizuka
Proceeding of ACMFMS2014 (Asian Conference on Mechanics of Functional Materials and Structures), Osaka Institute of Technology, 1, 61-64, 10 Oct. 2014
International conference proceedings, English

130℃の蒸煮処理を施した木質系粉末の圧密成形体の硬さ特性
Shohei Kajikawa; Takashi Iizuka
Lead, Journal of the Japan Society for Technology of Plasticity, 日本塑性加工学会, 55, 644, 853-857, 25 Sep. 2014, Peer-reviwed, New wood forming methods for improving the workability of wood, such as compaction molding or wood forging, have been developed in order to use wood biomass effectively. However, the improvement of the formability and mechanical properties of materials is desired for the practical realization of those wood forming methods. To improve the formability and mechanical properties of materials, it has been reported that steaming is effective. However, the effect of steaming at temperatures lower than 150-160 ℃ has not yet been investigated. In this study, we investigated the hardness of compacted products of woody powder steamed at 130 ℃. Cedar, beech, bamboo and kenaf cores were used as materials, and these materials were steamed for various times. Next, the compaction molding of materials was attempted, and the Vickers hardness and density of the products were measured. The results show that the hardness was increased by steaming when beech, bamboo and kenaf cores were used. In addition, the hardness is proportionally changed with the density for most of the products. On the other hand, in the case of bamboo and kenaf cores, the hardness of products formed from air-dried materials changed, but density remained unchanged. Thus, it was considered that the effect of steaming was greater than that of the density for bamboo and kenaf cores.
Scientific journal, Japanese

Hot Press Moldability of Bamboo Powder without Additives
Shohei Kajikawa; Takashi Iizuka
Lead, Key Engineering Materials, Trans Tech Publications, Ltd., 611-612, 852-858, May 2014, Peer-reviwed, The hot press moldability of bamboo powder without additives was investigated in this study. Bamboo powder was hot pressed into self-bonded cylindrical moldings at temperatures of 160 to 200 oC and pressing times of 1 to 20 min at a punch surface pressure of 200 MPa. After pressing, the color, density and bending properties of the moldings were evaluated. The bending strength, bending elastic modulus and density were found to increase with an increase in temperature, and moldings having good mechanical properties were obtained at a temperature of 200 oC. With respect to the influence of hot pressing time on moldability, a maximum bending strength of 34 MPa was achieved for a time of 10 min at a temperature of 200 oC. In addition, we removed moldings from the mold after cooling to 100 oC or less in order to improve the surface texture and density of the moldings. The results showed a cooled molding had a good surface texture (resembling plastic) and a bending strength of 53 MPa.
Scientific journal

Injection Molding Using Only 200°C Steamed Bamboo Powder by Controlling Metal Mold Temperature
Shohei Kajikawa; Takashi Iizuka
Lead, Procedia Engineering, Elsevier BV, 81, 1186-1191, 2014, Peer-reviwed
Scientific journal

Influence of Steaming and Boiling at 180 °C Plus on the Injectability of Bamboo Powder
Shohei Kajikawa; Takashi Iizuka
Lead, Key Engineering Materials, Trans Tech Publications, Ltd., 554-557, 1856-1863, Jun. 2013, Peer-reviwed, In this study, we investigated changes in the injectability of bamboo powder and the Vickers hardness of compacted products resulting from differences in heat-treatment conditions such as steaming and boiling. We conducted injection tests and test fabrications of compacted products using bamboo powder treated under various conditions. From the injection tests of heat-treated bamboo powder, we found that injectability was improved by heat treatment. While bamboo powder steamed at 200 °C showed good injectability, boiling at 200 °C yielded better injectability. Vickers hardness tests conducted on compacted products showed that hardness was increased by heat treatment under appropriate conditions. In addition, we found that the heat-treatment condition required to increase the hardness of product was different from that needed to improve injectability.
Scientific journal

Displacement Behavior of Wood in Boss Forming Using Open-Die Wood Forging
Shohei Kajikawa; Takashi Iizuka; Keisuke Yamaishi
Lead, Key Engineering Materials, Trans Tech Publications, Ltd., 504-506, 1261-1266, Feb. 2012, Peer-reviwed, Biomass materials such as wood are attracting renewed attention as alternative fuels in order to help resolve environmental resources caused by the use of fossil fuels. In this study, the possibility of products being processed from wood bulk was investigated by means of boss forming using open-die forging. Additionally, the difference in formability and deformation behavior during forging was investigated by changing the experimental conditions, such as the moisture content of the wood billets used, the forming pressure, and the forming temperature. The experimental results showed that wood had enough liquidity to be forged, and that two sudden and large increases in displacement occur during forging. Finally, the conditions governing these displacements were summarized from these results
Scientific journal

Small Container Fabrication Using Closed Die Wood Forging
Shohei Kajikawa; Takashi Iizuka; Keisuke Yamaishi; Nobuo Hatanaka; Norio Takakura; Kozo Kanayama
Lead, Steel Research International, Verlag Stahleisen GmbH, Special Edition, ICTP 201, 229-234, 25 Sep. 2011, Peer-reviwed
Scientific journal, English

Fundamental Formability of SPC/A1100 Hybrid Sheet Weleded by Butt Laser Welding
Takashi Iizuka; Shohei Kajikawa; Nobuo Hatanaka; Norio Takakura
Steel Research International, Verlag Stahleisen GmbH, Special Edition, ICTP 2011, 651-656, 25 Sep. 2011, Peer-reviwed, We investigated the fundamental formability of a steel/aluminium sheet butt welded using a CO2 laser. Tensile tests, punch stretching tests and deep drawing tests were conducted and their respective formabilities were evaluated. Deformation and fracture of the welded sheet during tests were also investigated. These experiments revealed that it was important for the welded sheet to have a high joint strength to sufficiently resist high biaxial tension and perpendicular tension to the weld bead. On the other hand, the ductility of the welded bead was found to affectt the parallel tension In the weld bead and flat punch stretching. A welded sheet is expected to have a maximum drawing ratio of at least about 1.7. Deformation of the flange material during deep drawing was considered to depend on the direction and the balance of the drawing resistances of the base materials. The variation in the number of ears generated in the drawn cup could be explained. © 2011 Wiley-VCH Verlag GmbH & Co. KGaA. Weinheim.
Scientific journal, English

Fabrication of deep aluminum container with flange by press forming of sheet metal
Shohei Kajikawa
Lead, 日刊工業新聞社, 01 Aug. 2024, Press Working, 62, 9, 30-36, Japanese, Invited, Introduction commerce magazine

Molding of Wood Based Powder
Shohei Kajikawa
Lead, 29 Jan. 2024, PLASTOS, 7, 73, 19-24, Japanese, Invited, Introduction scientific journal, 1882-0166, 154649354, 85184900305

Research and Development on Various Material Forming
Shohei Kajikawa
Lead, 05 Jan. 2024, Bulletin of The Iron and Steel Institute of Japan, 29, 1, 24-28, Japanese, Invited, Introduction scientific journal

Development of High-Pressure Forming Technology for Wood-Based Materials Inspired by Metal Forming
Shohei Kajikawa
Lead, 25 Dec. 2023, PLASTOS, 6, 72, 767-768, Japanese, Invited, Introduction scientific journal, 1882-0166, 154649368, 85182635760

Injection molding and extrusion of wood powder combined with sucrose and citric acid
Shohei Kajikawa
Lead, 12 Mar. 2023, BIO INDUSTRY, 40, 3, 35-41, Japanese, Invited, Introduction commerce magazine

Development of Tube Drawing Technology
Shohei Kajikawa
Lead, 25 Jul. 2022, PLASTOS, 5, 55, 453-457, Japanese, Invited, Introduction scientific journal

Implementation report on student research meeting of JSTP young research members at three kanto branches
Shohei Kajikawa
Lead, 日本塑性加工学会, May 2021, PLASTOS, 4, 41, 322-323, Japanese, Invited, Meeting report

Tube Forming
Shohei Kajikawa; Noah Utsumi; Takahiro Makiyama
Lead, Sep. 2020, PLASTOS, 3, 33, 527-531, English, Invited, Introduction scientific journal

Tube Forming
Atsushi Shirayori; Osamu Hasegawa; Shohei Kajikawa
Sep. 2019, PLASTOS, 2, 21, 548-553, English, Invited, Introduction scientific journal

木質系材料のみを用いた流動・自己接着による成形加工技術
梶川翔平
Lead, 日本工業出版, 10 Oct. 2017, プラスチックス, 68, 10, 33-36, Japanese, Invited, Introduction scientific journal, 0555-7887, 40021342802, AN00220092

木質材料の効率的な複雑形状部品成形のための基盤技術の開発
梶川翔平
Lead, 日本塑性加工学会, 25 Dec. 2013, 塑性と加工, 54, 635, 1090-1091, Japanese, Invited, Report scientific journal

Wood Resource Utilization Technologies and Markets
Hiroshi Nonaka; Takehiro Ishihara; Junji Nemoto; Hideko Sakai; Hitoshi Miyake; Shohei Kajikawa; Tsunehisa Miki; Koji Adachi
Contributor, 第5章 スクロースおよびクエン酸混合木粉の射出成形および押出し成形, CMC Publishing Co., Ltd., 08 Nov. 2023, 9784781317656

Drawing - Drawing Technologies for Bar, Wire and Tube -
Motoo Asakawa; Ken-ichi Saitoh; Kazunari Yoshida; Takashi Aizawa; Kiyoshi Uwai; Takashi Iwamoto; Tomokazu Masuda; Masanao Mimura; Tatsuya Okui; Naoki Takasugi; Akinori Tsuchiya; Takashi Kuboki; Shohei Kajikawa
Textbook, Japanese, Joint work, Chapter 11, Corona Publishing, 26 May 2017, 9784339043723

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, The Proc. of the 2024 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Tokyo, Japan, Domestic conference
17 May 2024

Forming of polygonal-shaped tube by expansion drawing
Shohei Kajikawa; Yusuke Kato; Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama
Oral presentation, Japanese, The Proc. of the 2024 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Tokyo, Japan, Domestic conference
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, Japanese, The Proc. of the 2024 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Tokyo, Japan, Domestic conference
17 May 2024

Straightening of drawing bar by using guide
Sho Matsumoto; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2024 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Tokyo, Japan, Domestic conference
17 May 2024

Injection and Compression Molding of Wood Powder with Natural Binder
Ryo Kawase; Hinako Uejima; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 2024 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Tokyo, Japan, Domestic conference
16 May 2024

Proposal for Diameter Reduction of Thin-Walled Copper Tubes by Using Torus-shaped Tools
Taizan Kaneko; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2024 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Tokyo, Japan, Domestic conference
15 May 2024

管材の拡管型抽伸加工法の開発
梶川 翔平; 久保木 孝
Nominated symposium, Japanese, 第91回伸線技術分科会研究集会, Invited, ⽇本塑性加⼯学会伸線技術分科会, 東京, Japan
22 Mar. 2024

Forming of polygonal-shaped tube by expansion drawing
Shohei Kajikawa
Nominated symposium, Japanese, 第163回チューブフォーミング分科会研究例会, Invited, ⽇本塑性加⼯学会チューブフォーミング分科会, 調布, Japan, Domestic conference
08 Mar. 2024
08 Mar. 2024- 08 Mar. 2024

Flow Forming of High-Density Wood for Forming Products with High Strength
Shohei Kajikawa; Takashi Kuboki; Soichi Tanaka
Poster presentation, Japanese, 515th Syimposium on Sustainable Humanosphere, Invited, Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Kyoto, Japan, Domestic conference
28 Feb. 2024
28 Feb. 2024- 29 Feb. 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

Square Tube Fabrication by Expansion Drawing of Circular Tube
Shohei Kajikawa; Yusuke Kato; Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama
Keynote oral presentation, English, 14th International Conference on the Technology of Plasticity, French Riviera, Peer-reviewed, France, International conference
25 Sep. 2023
24 Sep. 2023- 29 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
Oral presentation, English, XVI International Conference on Computational Plasticity, Internatinal Centre for Numerical Methods in Engneering (CIMNE), Barcelona, International conference
06 Sep. 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, English, XVI International Conference on Computational Plasticity, Internatinal Centre for Numerical Methods in Engneering (CIMNE), Barcelona, International conference
06 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, XVI International Conference on Computational Plasticity, Internatinal Centre for Numerical Methods in Engneering (CIMNE), Barcelona, International conference
05 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, XVI International Conference on Computational Plasticity, Internatinal Centre for Numerical Methods in Engneering (CIMNE), Barcelona, International conference
05 Sep. 2023

Effect of Moving Path on Bending Behavior in Dieless Flexible Roll Bending
Riku Usui; Shohei Kajikawa; Kazuhito Takahashi; Riku Yanada; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2023 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Nagoya, Japan, Domestic conference
10 Jun. 2023
09 Jun. 2023- 11 Jun. 2023

Simulation of Deformation in Wood Compression by Finite Element Analysis
Keitaro Oda; Takashi Kuboki; Soichi Tanaka; Tsunehisa Miki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 2023 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Nagoya, Japan, Domestic conference
11 Jun. 2023

Effect of plug shape on formability in forming square tube by expansion drawing
Yusuke Kato; Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 2023 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Nagoya, Japan, Domestic conference
10 Jun. 2023

Effect of Number of Contact Faces on Formability Rotary Flaring Using Conical Punch with Groove
Kiwamu Uchida; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 2023 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Nagoya, Japan, Domestic conference
10 Jun. 2023

Effect of Plug Half Angle and Feed Pitch on Formability in Tube Expansion Using Ball Spin Forming
Soma Oguri; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2023 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Nagoya, Japan, Domestic conference
10 Jun. 2023

管の成形・製造における加工限界・精度向上を実現する新しい工具形状の開発
梶川 翔平
Invited oral presentation, Japanese, 日本塑性加工学会 東関東支部 第68回技術懇談会, Invited
24 Apr. 2023
24 Apr. 2023- 24 Apr. 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, The Japan Wood Research Society, Fukuoka, Japan, Domestic conference
14 Mar. 2023
14 Mar. 2023- 16 Mar. 2023

Effect of heating condition on flowability and physical properties of the flowed sample
Megumi Goto; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The 73rd Annual Meeting of Japan Wood Research Society, The Japan Wood Research Society, Fukuoka, Japan, Domestic conference
14 Mar. 2023
14 Mar. 2023- 16 Mar. 2023

Influence of parent tube material on deformation characteristics in the expansion drawing process
Shiliang Zhang; Takashi Kuboki; Masayoshi Akiyama; Shohei Kajikawa
Oral presentation, Japanese, The Proceedings of the 73rd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Sendai, Domestic conference
18 Nov. 2022

FEM study on Effect of Drawing Direction, Die Half Angle and
Sho Matsumoto; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proceedings of the 73rd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Sendai, Domestic conference
18 Nov. 2022

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 Proceedings of the 73rd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Sendai, Domestic conference
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, Japanese, The Proceedings of the 73rd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Sendai, Domestic conference
18 Nov. 2022

Development of forming technology of wood-based materials using only natural resources
Shohei Kajikawa
Invited oral presentation, Japanese, 環境科学会2022年会, Invited, Society of Environmental Science, Japan, Online, Domestic conference
09 Sep. 2022

木質系粉末の押出し加工による円管成形
Shohei Kajikawa
Invited oral presentation, Japanese, 令和4年度研究成果報告会(第22回), Invited, (公財)金型技術振興財団, Chiba, Domestic conference
05 Aug. 2022

Effect of punch shape on formability in deep drawing of square cup with high aspect ratio
Yutaro Umehara; Shohei Kajikawa; Takashi Kuboki; Kenji Tamaoki; Katsuyuki Onishi; Akira Gunji; Akira Yamauchi
Oral presentation, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
05 Jun. 2022

Die-shape optimization for crack prevention and die-life longevity
Ryunosuke Yakuno; Takashi Kuboki; Shohei Kajikawa; Kazuhito Takahashi
Oral presentation, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
05 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 Kubok
Oral presentation, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
05 Jun. 2022

Effect of punch shape on formability in wood forging
Hinako Uejima; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
05 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, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
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, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
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, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
04 Jun. 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, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
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, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
04 Jun. 2022

Reproduction of Compression Properties of Wood by Multiscale Finite Element Analysis
Shota Oda; Shohei Kajikawa; Takashi Kuboki; Mitsuru Abe; Masako Seki; Tsunehisa Miki; Eduardo De; Souza Neto
Oral presentation, Japanese, The Proceedings of the 2022 Japanese Spring Conference for the Technology of Plasticity, The Society of Materials Science, Japan, Osaka/Online, Domestic conference, with international co-author(s)
31 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, The Japan Wood Research Society, Nagoya-Gifu/Online, Domestic conference
15 Mar. 2022

効果的な薄肉管製造を目的とした新しい拡管加工法の開発
梶川 翔平
Invited oral presentation, Japanese, 日本鉄鋼協会創形創質工学部会若手フォーラム・日本塑性加工学会東京南関東支部・共催 オンライン交流発表会, Invited, 日本鉄鋼協会創形創質工学部会若手フォーラム, オンライン
03 Feb. 2022

Rotary flaring with relieved plug -Effect of plug feed rate on tube formability-
Kazumasa Iizuka; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proceedings of the 72nd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
30 Oct. 2021

Effect of plug half angle on tube formability in expansion drawing process
Zhang Shiliang; Hikaru Kawaguchi; Shohei Kajikawa; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama
Oral presentation, Japanese, The Proceedings of the 72nd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
30 Oct. 2021

Effects of Steel Ball Diameter and Pushing Rate on Flexible Ball Spin Forming
Shota Hirama; Toshiyuki Ikeda; Shiori Gondo; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proceedings of the 72nd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
30 Oct. 2021

Fabrication of a ring groove on tube inner-surface by ironing from outer surface using upward force control of tube bottom end
Junki Ishino; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proceedings of the 72nd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
30 Oct. 2021

Investigation on tool shape for forming square tube by expansion drawing
Shohei Kajikawa; Zhang Shiliang; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama
Oral presentation, English, The Proceedings of the 72nd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
30 Oct. 2021

Tube Production by Extrusion of Wood Powder Combining Natural Binder with Cooling Die
Yuya Suzumoto; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proceedings of the 72nd Japanese Joint Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
29 Oct. 2021

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
Oral presentation, English, XVI International Conference on Computational Plasticity, Barcelona/Online, International conference
09 Sep. 2021

Effect of Contact Area on Formability in Rotary Flaring Using Conical Punch with Groove
Kazumasa Iizuka; Shohei Kajikawa; Takashi Kuboki
Oral presentation, English, XVI International Conference on Computational Plasticity, Barcelona/Online, International conference
09 Sep. 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, The Proceedings of the 2021 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
04 Jun. 2021

Development of Twisting Method for Sheet Metal using Taper Roll
Avanish Kumar; Shohei Kajikawa; Takashi Kuboki; Takahiro Makiyama
Oral presentation, Japanese, The Proceedings of the 2021 Japanese Spring Conference for the Technology of Plasticity, The Japan Society for Technology of Plasticity, Online, Domestic conference
04 Jun. 2021

ffect of heating temperature and time on flowability of wood powder combined with sucrose and citric acid
Megumi Goto; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The 71st Annual Meeting of Japan Wood Research Society, The Japan Wood Research Society, Online, Domestic conference
19 Mar. 2021

天然系バインダを混合した木粉の押出し加工による円管製造の試み
Yuya Suzumoto; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 71th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Online, 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 the Technology of Plasticity, 日本塑性加工学会, Online, 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, Online, 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; Kenko 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, Online, Domestic conference
14 Nov. 2020

Flexible Diameter Reduction of Tubes with Planetary Balls
Takayuki Ikeda; Takashi Kuboki; Shohei Kajikawa
Oral presentation, Japanese, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
Oct. 2019

Development of tube expansion drawing (Second report) -Effect of expansion ratio on formability-
Hikaru Kawaguchi; Shohei Kajikawa; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masayoshi Akiyama
Oral presentation, Japanese, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
Oct. 2019

Finite element analysis of spinner straightening
Keiichiro Kawasaki; Takashi Kuboki; Shohei Kajikawa; Hiromichi Matumura; Tetushi Ono; Hikaru Seimiya
Oral presentation, Japanese, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
Oct. 2019

Effect of particle size on flow behavior and moldability of wood powder combining natutal binder
Kiu Cho; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
Oct. 2019

Unbalance bending of sheet metal for the reduction of machining space in V-bending
Takahiro Hadano; Takashi Kuboki; Shohei Kajikawa; Yingjun Jin; Hitoshi Omata; He Huang; Keita Kimura
Oral presentation, Japanese, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
Oct. 2019

Investigation of internal fracture factor in form rolling process
Waka Matsumura; Shohei Kajikawa; Takashi Kuboki; Koji Yamane
Oral presentation, Japanese, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
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, The Proc. of the 70th Japanese Joint Conference for the Technology of Plasticity, 日本塑性加工学会, Narashino, Domestic conference
Oct. 2019

Injection molding of wood powder with sucrose and citric acid
Shohei Kajikawa; Masaya Horikoshi; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2019 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Kyotanabe, Domestic conference
08 Jun. 2019

1D bending process with shear bending
Daisuke Kusuda; Takashi Kuboki; Shohei Kajikawa; Naoyuki Morimoto; Takahiro Noguchi; Kazuaki Adachi
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, Domestic conference
27 Oct. 2018

Development of forming process of coil spring with uniform rectangular shaped cross section
Waka Matsumura; Kohei Okada; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, Domestic conference
27 Oct. 2018

Stability of a suppression method of dent and spring-back in zigzag bending of sheet metal/plate
Takahiro Hadano; Takashi Kuboki; Shohei Kajikawa; Takuma Yamada; Hiroyuki Abe
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, Domestic conference
27 Oct. 2018

The influence of tube outer surface shape on lead angle during extrusion of inner spiral grooved tube
Yoichiro Hara; Michiaki ishikawa; Shohei Kajikawa; Takashi Kuboki; Makoto Murata
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, Domestic conference
27 Oct. 2018

Finite Element Analysis of Spinner Straightener by Dynamic Explicit Scheme
Keiichiro Kawasaki; Daisuke Kusuda; Takashi Kuboki; Shohei Kajikawa; Hiromichi Matsumura; Tetsushi Ono; Hikaru Seimiya
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, Domestic conference
27 Oct. 2018

Development of expansion drawing -Study on flaring limit for circular tube-
Hikaru Kawaguchi; Shohei Kajikawa; Takashi Kuboki; Isamu Akasaka; Yuzo Terashita; Masami Ikeda; Masayoshi Akiyama
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, Domestic conference
27 Oct. 2018

Research on fabricating limit for 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
Oral presentation, Japanese, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Kumamoto, 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, Tokyo, Domestic conference
02 Jun. 2018

Effect of particle size on moldability of wood powder combining natural binder
Kiu Cho; Shohei Kajikawa; Takashi Kuboki
Oral presentation, Japanese, The Proc. of the 2018 Japanese Spring Conference for the Technology of Plasticity, 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, Tokyo, Domestic conference
02 Jun. 2018

回転自在なパンチを用いた逐次面内曲げ加工
久保木 孝; 梶川 翔平; 金 英俊; Armad Azrie
Oral presentation, Japanese, 日本機械学会関東支部第24期総会・講演会, Domestic conference
17 Mar. 2018

圧縮力を駆動力とした金属薄板の張出し加工において工具形状が成形性に及ぼす影響
梶川 翔平; 松浦 拓也; 久保木 孝; 飯塚 高志
Oral presentation, Japanese, 日本機械学会関東支部第24期総会・講演会, Domestic conference
17 Mar. 2018

薄肉銅円管の回転引き曲げ加工における不整変形の抑制方法
荒木聖人; 久保木孝; 梶川翔平; 土屋昭則; 崩岡久敏; 渡辺雅人
Oral presentation, Japanese, 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

遊星ボールダイスによるパイプの加工
池田峻之; 久保木孝; 梶川翔平
Oral presentation, Japanese, 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

天然系添加剤を混合した木粉の成形性に及ぼす木粉粒度の影響
曺基宇; 堀越将矢; 梶川翔平; 久保木 孝
Oral presentation, Japanese, 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

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 rod in spinner straightening
Daisuke Kusuda; Takashi Kuboki; Shohei Kajikawa; Hiromichi Matsumura; Masashi Ono; 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; Akira Yamauchi; Akira Gunji; Katsuyuki Onishi
Oral presentation, English, The Proc. of the 68th Japanese Joint Conference for the Technology of Plasticity, Domestic conference
10 Nov. 2017

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

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, 平成29年度塑性加工春季講演会講演論文集, 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, 平成29年度塑性加工春季講演会講演論文集
09 Jun. 2017

三次元形状部品の成形加工を目的としたスクロース・クエン酸混合物添加木粉の熱流動特性の評価
堀越将矢; 梶川翔平; 田中聡一; 梅村研二; 金山公三
Oral presentation, Japanese, 第67回日本木材学会大会, Domestic conference
17 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, Domestic conference
16 Mar. 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, Domestic conference
16 Mar. 2017

Forming method of coiled spring with high rectangle ratio
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
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
Oct. 2016

薄肉銅管の回転引き曲げ加工による小径曲げにおいてマンドレル形状が成形性に及ぼす影響
木村 圭太; 久保木 孝; 梶川 翔平; 渡辺 雅人; 崩岡 久敏
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
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, saitama, Domestic conference
Oct. 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, 日本ばね学会, Tokyo
09 Jun. 2016

The effect of mandrel and pressure die shapes in draw bending of thin-walled copper tube
木村圭太; 王広輝; 久保木孝; 梶川翔平; 渡辺雅人; 土屋昭則
Oral presentation, Japanese, The 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Kyoto, Domestic conference
May 2016

Effect of groove shape and angles of tools on formability in tube extrusion with spiral projections
石川道明; 八木田太郎; 村田眞; 久保木孝; 梶川翔平
Oral presentation, Japanese, The 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Kyoto, Domestic conference
May 2016

Effect of Tension and Crash on Reduction in Tube Diameter in Tube Drawing using A Pair of Concave Rolls
梶川翔平; 久保木孝
Oral presentation, Japanese, The 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Kyoto, Domestic conference
May 2016

Proposal of a FEA model for shortening calculation time
村岡剛; 久保木孝; 梶川翔平; 彌永大作; 黒田浩一
Oral presentation, Japanese, The 2016 Japanese Spring Conference for the Technology of Plasticity, 日本塑性加工学会, Kyoto, Domestic conference
May 2016

水酸化アルミニウムスラッジ・ポリエチレン複合材料の圧粉成形性および燃焼特性
梶川翔平; 小林憲人; 飯塚高志; 高畑敏夫; 牧恒雄
Oral presentation, Japanese, 第66回塑性加工連合講演会, Domestic conference
30 Oct. 2015

産業廃棄物の有効利用を目的としたコーヒー粉末およびそば殻の流動固化による固形燃焼作製の試み
梶川翔平; 飯塚高志; 吉川昌男; 平山米男; 貝原束
Oral presentation, Japanese, 日本材料学会 第64期学術講演会, Domestic conference
May 2015

Effect of Surface State of Die on Flow Rate of Steamed Bamboo Powder in Thermal Flow Test Using Capillary Rheometer
Shohei Kajikawa; Riku Sakagami; Takashi Iizuka
Oral presentation, English, 18th ESAFORM Conference/Key Engineering Materials, International conference
Apr. 2015

加工法に依存した金型表面状態の違いが蒸煮処理竹粉の流動難易に及ぼす影響
梶川翔平; 坂上陸; 飯塚高志
Poster presentation, Japanese, 第65回日本木材学会大会, Domestic conference
Mar. 2015

木質系材料の熱流動性に及ぼす金型表面性状の影響
梶川翔平; 坂上陸; 飯塚高志
Oral presentation, Japanese, 第65回塑性加工連合講演会, Domestic conference
Oct. 2014

蒸煮処理タケ粉末の熱流動性評価-蒸煮温度および時間に伴う熱水抽出成分量と熱流動性の関係
梶川翔平; 飯塚高志
Oral presentation, Japanese, 第58回日本学術会議 材料工学連合講演会, Domestic conference
Oct. 2014

Injection molding using only 200 °C steamed bamboo powder by controlling metal mold temperature
Shohei Kajikawa; Takashi Iizuka
Oral presentation, English, 11th International Conference on Technology of Plasticity/Procedia Engineering, International conference
Oct. 2014

Flowability of the steamed bamboo powder -Influence of steaming temperature and time on the flowability-
Shohei Kajikawa; Takashi Iizuka
Oral presentation, English, 4th Asian Conference on Mechanics of Functional Materials and Structures, International conference
Oct. 2014

産業廃棄物の有効利用を目的とした木質系バイオマスの流動固化による固形燃料作製の試み
飯塚高志; 梶川翔平; 吉川昌男; 平山米男; 貝原束
Oral presentation, Japanese, 日本材料学会 第63期学術講演会, Domestic conference
May 2014

蒸煮処理タケ粉末の熱流動性に及ぼす熱水抽出処理の影響
梶川翔平; 飯塚高志
Oral presentation, Japanese, 日本材料学会 第63期 学術講演会, Domestic conference
May 2014

Hot press moldability of bamboo powder without additives
Shohei Kajikawa; Takashi Iizuka
Oral presentation, English, 17th ESAFORM Conference/Key Engineering Materials, International conference
May 2014

200℃の飽和水蒸気処理を施したタケ粉末の射出成形性評価 (金型温度の違いが成形性に及ぼす影響)
梶川翔平; 飯塚高志
Oral presentation, Japanese, 第64回日本木材学会大会, Domestic conference
Mar. 2014

200℃の蒸煮処理を施した竹粉の流動特性-処理時の粉末の水分状態が流動性に及ぼす影響-
梶川翔平; 飯塚高志
Oral presentation, Japanese, 第64回塑性加工連合講演会, Domestic conference
Nov. 2013

分散性向上を目指した水蒸気改質・爆砕処理木竹粉混合WPC射出成形材の力学特性評価
大田智之; 梶川翔平; 飯塚高志; 飯塚徳達; 牧恒雄; 片原伸郎; 高畑敏夫
Oral presentation, Japanese, 日本材料学会 第62期学術講演会, Domestic conference
May 2013

Influence of Steaming and Boiling at 180 °C plus on the Injectability of Bamboo Powder
Shohei Kajikawa; Takashi Iizuka
Oral presentation, English, 16th ESAFORM Conference/Key Engineering Materials, International conference
Apr. 2013

180℃以上の蒸煮・煮沸処理を施した竹粉の流動特性
梶川翔平; 飯塚高志
Oral presentation, Japanese, 第63回日本木材学会大会, Domestic conference
Mar. 2013

130℃蒸煮処理を施したブナ粉末の圧粉成形体の硬さ特性
梶川翔平; 大田智之; 飯塚高志
Oral presentation, Japanese, 第63回塑性加工連合講演会, Domestic conference
Nov. 2012

180℃の蒸煮処理を施した竹粉の射出性に蒸煮時間が及ぼす影響
梶川翔平; 飯塚高志
Oral presentation, Japanese, 第63回塑性加工連合講演会, Domestic conference
Nov. 2012

200℃の煮沸処理が竹粉の射出性に及ぼす影響
梶川翔平; 飯塚高志
Oral presentation, Japanese, 第56回日本学術会議 材料工学連合講演会, Domestic conference
Oct. 2012

180℃の蒸煮処理を施した竹粉の圧粉成形体における硬さ特性
梶川翔平; 飯塚高志
Oral presentation, Japanese, 日本材料学会 第61期学術講演会, Domestic conference
May 2012

Displacement Behavior of Wood in Boss Forming Using Open-Die Wood Forging
Shohei Kajikawa; Takashi Iizuka; Keisuke Yamaishi
Oral presentation, English, 15th ESAFORM Conference/Key Engineering Materials, International conference
Mar. 2012

蒸煮処理を施した竹粉の流動性評価法の検討
梶川翔平; 飯塚高志; 高倉章雄
Oral presentation, Japanese, 第62回塑性加工連合講演会, Domestic conference
Nov. 2011

Small Container Fabrication Using Closed Die Wood Forging
Shohei Kajikawa; Takashi Iizuka; Keisuke Yamaishi; Nobuo Hatanaka; Norio Takakura; Kozo Kanayama
Oral presentation, English, 10th International Conference on Technology of Plasticity/Steel Research International, International conference
Sep. 2011

Fundamental Formability of SPC/A1100 Hybrid Sheet Weleded by Butt Laser Welding
Takashi Iizuka; Shohei Kajikawa; Nobuo Hatanaka; Norio Takakura
Oral presentation, English, 10th International Conference on Technology of Plasticity/Steel Research International, International conference
Sep. 2011

簡易な密閉型を用いた木材鍛造による容器作製の試み
梶川翔平; 飯塚高志; 山石啓介; 高倉章雄
Oral presentation, Japanese, 日本材料学会 第60期学術講演会, Domestic conference
May 2011

蒸煮処理を施した植物系低含水粉末の圧粉成形体の硬さ試験
梶川翔平; 飯塚高志; 高倉章雄
Oral presentation, Japanese, 日本機械学会 卒業研究発表講演会, Domestic conference
Mar. 2011

生産加工学基礎
Apr. 2021 - Present
電気通信大学

基礎科学実験A
Apr. 2019 - Present
電気通信大学

イノベイティブ総合コミュニケーションデザイン２
Apr. 2018 - Present
電気通信大学

加工学および演習
Apr. 2017 - Present
電気通信大学

メカノデザイン
Oct. 2015 - Present
電気通信大学

インターンシップ（III類）
Apr. 2022 - Mar. 2024
電気通信大学

専門実験B
Apr. 2016 - Mar. 2018
電気通信大学

生産加工概論
Apr. 2017 - Sep. 2017
明星大学

機械工学実験第一
Sep. 2016 - Mar. 2017
首都大学東京

Jul. 2019 - Present
The Iron and Steel Institute of Japan

Nov. 2017 - Present
The Japan Society of Mechanical Engineers

Jan. 2013 - Present
The Japan Wood Research Society

Jun. 2011 - Present
The Japan Society for Technology of Plasticity

Apr. 2011 - Present
The Society of Materials Science, Japan

多様な断面形状の管材製造を可能とする拡管抽伸加工の開発
梶川 翔平
公益財団法人 JKA, 競輪とオートレースの補助事業, 電気通信大学, Principal investigator
Apr. 2024 - Mar. 2025

木材の階層的構造再現モデルを用いた塑性加工シミュレーション
梶川 翔平
公益財団法人 三五ものづくり基金, 研究開発助成, 電気通信大学, Principal investigator
Apr. 2024 - Mar. 2025

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 Grant-in-Aid for Scientific Research (C), The University of Electro-Communications, Grant-in-Aid for Scientific Research (C), Principal investigator, 22K04773
Apr. 2022 - Mar. 2025

Flow Forming of High-Density Wood for Forming Products with High Strength
京都大学生存圏研究所, 2023年度生存圏科学共同研究, 電気通信大学，京都大学生存圏研究所, Principal investigator
Jul. 2023 - Mar. 2024

深底容器形状の成形における省工程化を実現する金属薄板の局所圧縮加工法の開発
梶川 翔平
公益財団法人 三五ものづくり基金, 研究開発助成, 電気通信大学, Principal investigator
Apr. 2023 - Mar. 2024

天然系バインダ混合木粉の成形性に及ぼす熱履歴の影響
梶川 翔平
公益財団法人 ホソカワ粉体工学振興財団, 研究助成, 電気通信大学, Principal investigator
Apr. 2023 - Mar. 2024

Development of new process for forming thin-walled tube with high dimensional accuracy by rotary tube flaring with relieved punch and expansion drawing
梶川 翔平
The Amada Foundation, Grant-in-aid for research, The University of Electro-Communications, Principal investigator
Oct. 2021 - Mar. 2024

Development of Numerical Simulation Method to Reproduce Large Deformation Behavior of Wood Considering Multi-Scale Structure
京都大学生存圏研究所, 2022年度生存圏科学共同研究, 電気通信大学，京都大学生存圏研究所，（国研）産業技術総合研究所, Principal investigator, Domestic joint research
Sep. 2022 - Mar. 2023

Estimation of properties and yield criterion of wood by utilizing multi-scale finite element method
梶川 翔平
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists, The University of Electro-Communications, Grant-in-Aid for Early-Career Scientists, Principal investigator, 2021年度は，木材の圧縮試験に関して，マルチスケールFEM解析および実験結果を比較し，解析結果の妥当性を検証した．また，木材の降伏後の変形挙動を把握するため，木材の鍛造加工実験を行い，変形中の細胞構造の変化を調査した．主な実績は，以下の通りである． (1) スギ材の年輪傾角が横圧縮特性に及ぼす影響を，年輪構造を再現したモデル（年輪モデル）を用いたマルチスケールFEM解析および実験にて調査した．その結果，降伏応力およびヤング率は試験片の年輪傾角によって変化し，解析および実験における傾向が一致した．したがって，降伏に至るまでの微小変形領域においては，細胞構造を模擬したマルチスケールFEM解析によって，木材の圧縮特性を再現できる可能性がある． (2) 早材部および晩材部のみを模擬したモデル（早材モデル，晩材モデル）を用いてマルチスケールFEM解析を行い，年輪モデルと比較した結果，年輪モデルの圧縮特性は，早材および晩材モデルの特性が組み合わさったものになっていることが確認された．また，年輪モデルの材料特性は，モデルを構成する早材および晩材部の比率に支配されていることが明らかになった． (3) 木材の鍛造加工実験を行い，試験片に対する圧縮方向の違いが変形挙動に及ぼす影響を調査した結果，圧縮方向が異なると，変形挙動は大きく変化した．繊維方向にプレスした場合，細胞構造の破壊をともないながら変形する．一方，半径方向に圧縮する場合，空隙部分が押しつぶされるが，細胞構造は破壊されにくい． (4) 鍛造加工にて見られるような木材の大変形挙動をより詳細に検討するため，Discrete Element Method (DEM)を用いた解析モデルを検討した．まずは，単純な粒子の組み合わせによるモデルを作成し，木材の圧縮に関する解析を実施した結果，粒子サイズが加工荷重に及ぼす影響に関して，実験と解析結果における傾向が一致した．, 19K15319
Apr. 2019 - Mar. 2023

木質系粉末の押出し加工による円管成形
梶川 翔平
公益財団法人金型技術振興財団, 研究助成, Principal investigator
Apr. 2021 - Mar. 2022

高成形性および高生産性を実現する逃げ有りパンチを用いた管の口広げ加工
梶川 翔平
公益財団法人スズキ財団, 研究助成
Apr. 2021 - Mar. 2022

圧倒的な高品質・低価格を実現するプレス複合深絞り技術を具現化した汎用プレス機用金型の開発
戦略的基盤技術高度化支援事業（サポイン）, 山内エンジニアリング，電気通信大学，東京都立産業技術研究センター, Coinvestigator
Jul. 2019 - Mar. 2022

Development of joint method of Ulin produced from Indonesia using rubber fixture
京都大学生存圏研究所, 2019年度生存圏ミッション研究, 電気通信大学，京都大学生存圏研究所，（株）林田順平商店, Principal investigator
Jul. 2019 - Mar. 2020

Development of new joint technology of Ulin produced from Indonesia utilizing frictional force
京都大学生存圏研究所, 2018年度生存圏ミッション研究, 電気通信大学，京都大学生存圏研究所，（株）林田順平商店, Principal investigator
Jul. 2018 - Mar. 2019

Development of molding technology for only woody material by activation of material
Shohei Kajikawa
Japan Society for the Promotion of Science, KAKENHI grant, The University of Electro-Communications, Grant-in-Aid for Early-Career Scientists B, Principal investigator, 16K18265
Apr. 2016 - Mar. 2019

Production of high-strength elongated member by development of new joint technology of Ulin produced from Indonesia
京都大学生存圏研究所, 2017年度生存圏ミッション研究, 電気通信大学，京都大学生存圏研究所，（株）林田順平商店, Principal investigator
Jul. 2017 - Mar. 2018

Development of forming method using wood powder with natural adhesive for fabrication of product with three dimensional shape
京都大学生存圏研究所, 2016年度生存圏ミッション研究, 電気通信大学，京都大学生存圏研究所, Principal investigator
Jul. 2016 - Mar. 2017

第263回塑性加工技術セミナー＜Web開催＞ 「チューブフォーミングの基礎と実際」
Presenter, 日本塑性加工学会, Seminar
04 Sep. 2024 - 04 Sep. 2024

第257回塑性加工技術セミナー「チューブフォーミングの基礎と実際」管端加工
Lecturer, 日本塑性加工学会, Seminar
13 Sep. 2023 - 13 Sep. 2023

木の粉末 薬品使わず成型
Other than myself, 日本経済新聞社, 日経産業新聞, Paper
10 Aug. 2017

ICTP 2023 Scientific Committee
Competition etc, Panel chair etc, ICTP 2023, 24 Sep. 2023 - 29 Sep. 2023, French Riviera

COMPLAS 2023 Invited session organizer
Academic society etc, Planning etc, 05 Sep. 2023 - 06 Sep. 2023, True