Research Subjects

Novel Forming Processes with Controlling Forming Ram Motion

• R. Matsumoto, S. Sawa, H. Utsunomiya and K. Osakada: Prevention of Galling in Forming of Deep Hole with Retreat and Advance Pulse Ram Motion on Servo Press, CIRP Annals - Manufacturing Technology, 60/1(2011), pp. 315-318. [DOI:10.1016/j.cirp.2011.03.147]
  
• R. Matsumoto, T. Chida and H. Utsunomiya: Improvement of Bonding Strength of Bar and Plate in Indentation Plastic Joining with Bar Oscillation Using Servo Press, Steel Research International, 82(2011), Special Edition, pp. 634-638. (Proceedings of the 10th International Conference on Technology of Plasticity (ICTP 2011)) [ISBN:978-3-514-00784-0]
  
• R. Matsumoto, Y. Osumi and H. Utsunomiya: Selective Die Quenching of Hot Forged Steel Product Using High and Low Thermal Conductivity Tools on a Servo Press, Steel Research International, (2012), Special Edition, pp. 207-210. (Proceedings of the 14th International Conference on Metal Forming (Metal Forming 2012)) [ISBN:978-3-514-00797-0] [Link]
  
• R. Matsumoto, T. Kubo and K. Osakada: Cold Piercing of Magnesium Alloy Billet with High Aspect Ratio, International Journal of Machine Tools & Manufacture, 46-5(2006), pp. 459-466. [DOI:10.1016/j.ijmachtools.2005.07.039]
  
• K. Osakada, R. Matsumoto, M. Otsu and S. Hanami: Precision Extrusion Methods with Double Axis Servo-Press Using Counter Pressure, CIRP Annals - Manufacturing Technology, 54/1(2005), pp. 245-248. [DOI:10.1016/S0007-8506(07)60094-8]
  
• R. Matsumoto, T. Kagechika and H. Utsunomiya: Finite Element Analysis of Shape Accuracy of Billet Cold-Forged with Stepwise Ram Motion, Mechanical Engineering Journal, 6-3(2019), 18-00523. (12 pages) [DOI:10.1299/mej.18-00523]
  

Plastic Flow Joining

• R. Matsumoto, S. Hanami, A. Ogura, H. Yoshimura and K. Osakada: New Plastic Joining Method Using Indentation of Cold Bar to Hot Forged Part, CIRP Annals - Manufacturing Technology, 57/1(2008), pp. 279-282. [DOI:10.1016/j.cirp.2008.03.126]
• 松本　良, 花見眞司, 小坂田宏造, 吉村豹治: 鋼材−アルミニウム材の異種金属の植込み接合（フランジ付軸部品の植込み接合法の開発　第2報）, 塑性と加工, 50-581(2009), 550-554. [DOI:10.9773/sosei.50.550] [CiNii] (in Japanese)
  
• R. Matsumoto: Indentation Plastic Joining of Steel Rod and Polycarbonate Plate, Journal of Materials Processing Technology, 283(2020), 116719. (8 pages) [DOI:10.1016/j.jmatprotec.2020.116719]
  
• R. Matsumoto, H. Sakaguchi, M. Otsu and H. Utsunomiya: Plastic Joining of Open-Cell Nickel Foam and Polymethyl Methacrylate (PMMA) by Friction Stir Incremental Forming, Journal of Materials Processing Technology, 282(2020), 116691. (10 pages) [DOI:10.1016/j.jmatprotec.2020.116691]
  
  
• R. Matsumoto, K. Hashimoto and H. Utsunomiya: Improvement in Bonding Strength by Applying Circumferential Sliding in Cold Copper/Aluminum Forge-Bonding, Journal of Materials Processing Technology, 307(2022), 117685. (9 pages) [DOI:10.1016/j.jmatprotec.2022.117685]
  

Forging with Torsion

Reduction in axial load

• R. Matsumoto, J. Kou and H. Utsunomiya: Reduction in Axial Forging Load by Low-Frequency Torsional Oscillation in Cold Upsetting, International Journal of Advanced Manufacturing Technology, 93-1-4(2017), pp. 933-943. [DOI:10.1007/s00170-017-0553-1]
• 松本　良, ��塚誠司, 宇都宮 裕: 冷間後方カップ押出し鍛造におけるねじり振動付加による軸方向押出し荷重の低減（ねじりモーション付加鍛造加工法の開発　第1報）, 塑性と加工, 60-703(2019), 235-240. [DOI:10.9773/sosei.60.235] [CiNii] (JSTP Best Paper Award)

Change in direction of plastic flow

• R. Matsumoto, S. Tanaka and H. Utsunomiya: Enhancement of Plastic Flow in Lateral Direction by Torsional Oscillation in Upsetting and Lateral Extrusion, Journal of Materials Processing Technology, 299(2022), 117369. (11 pages) [DOI:10.1016/j.jmatprotec.2021.117369]

Expansion of shear deformation zone

• H. Ohnishi, K. Takamoto, H. Matsumoto and R. Matsumoto: Microstructural Evolution of A Ti-6Al-4V Alloy Produced by Forging Process Combined with Torsional Motion, Journal of Manufacturing Processes, 58(2020), pp. 1161-1170. [DOI:10.1016/j.jmapro.2020.09.019]
• 外村圭資, 松本　良, 李　相民, 宇都宮 裕: α黄銅の冷間据込み鍛造におけるねじりモーション付加によるひずみ分布の変化, 銅と銅合金, 60-1(2021), 176-181. [DOI:10.34562/jic.60.1_176] [CiNii]

Enhancement of surface quality of forging part

• 松本　良, ��塚誠司, 宇都宮 裕: 冷間後方カップ押出し鍛造におけるねじり振動付加による押出し部の表面性状および形状の変化（ねじりモーション付加鍛造加工法の開発　第2報）, 塑性と加工, 60-703(2019), 241-246. [DOI:10.9773/sosei.60.241] [CiNii]

Forging of Magnesiumm Alloys

• R. Matsumoto and K. Osakada: Lubrication and Friction of Magnesium Alloys in Warm Forging, CIRP Annals - Manufacturing Technology, 51/1(2002), pp. 223-226. [DOI:10.1016/S0007-8506(07)61504-2]
• R. Matsumoto and K. Osakada: Development of Warm Forging Method for Magnesium Alloy, Materials Transactions, 45-9(2004), pp. 2838-2844. [DOI:10.2320/matertrans.45.2838] [CiNii]
  
• R. Matsumoto, T. Kubo and K. Osakada: Fracture of Magnesium Alloy in Cold Forging, CIRP Annals - Manufacturing Technology, 56/1(2007), pp. 293-296. [DOI:10.1016/j.cirp.2007.05.068]
  
• R. Matsumoto, M. Yamasaki, M. Otsu and Y. Kawamura: Forgeability and Flow Stress of Mg-Zn-Y Alloys with Long Period Stacking Ordered Structure at Elevated Temperatures, Materials Transactions, 50-4(2009), pp. 841-846. [DOI:10.2320/matertrans.MRA2008255] [CiNii]
• 松本　良: 市販AZ31Bマグネシウム合金の冷間鍛造, 塑性と加工, 50-585(2009), 914-918. [DOI:10.9773/sosei.50.914] [CiNii] (in Japanese)
• 松本　良: マグネシウム合金の塑性加工におけるトライボロジー, トライボロジスト, 55-12(2010), 867-872. [CiNii] [Link] (in Japanese)

Dry and Semi-dry Metal Forming

[PDF file]

• K. Osakada and R. Matsumoto: Fundamental Study of Dry Metal Forming with Coated Tools, CIRP Annals - Manufacturing Technology, 49/1(2000), pp. 161-164. [DOI:10.1016/S0007-8506(07)62919-9]
• R. Matsumoto and K. Osakada: Measurement of Friction in Cold Upsetting with Mist Lubrication, Materials Transactions, 45-9(2004), pp. 2891-2896. [DOI:10.2320/matertrans.45.2891] [CiNii]
• R. Matsumoto, H. Kawashima and K. Osakada: Friction and Adhesion in Dry Warm Forging of Magnesium Alloy with Coated Tools, Journal of Solid Mechanics and Materials Engineering, 1-4(2007), pp. 397-405. [DOI:10.1299/jmmp.1.397] [CiNii]
• R. Matsumoto and K. Osakada: Measurement of Friction of Aluminium Alloys in Cold Forging with Small Quantity Lubrication, Steel Research International, 79(2008), Special Edition, vol. 2, pp. 73-79. (Proceedings of the 12th International Conference on Metal Forming (Metal Forming 2008)) [Abstract]
• 松本　良, 宇都宮 裕: 鍛造加工におけるドライ・セミドライ化, 塑性と加工, 54-626(2013), 210-214. [DOI:10.9773/sosei.54.210] [CiNii] (in Japanese)

Deformation Processes on Porous Metals

• R. Matsumoto, S. Mori, M. Otsu and H. Utsunomiya: Formation of Skin Surface Layer on Aluminum Foam by Friction Stir Powder Incremental Forming, International Journal of Advanced Manufacturing Technology, 99-5-8(2018), pp. 1853-1861. [DOI:10.1007/s00170-018-2633-2]
  
• R. Matsumoto, S. Kanatani and H. Utsunomiya: Filling of Surface Pores of Aluminum Foam with Polyamide by Selective Laser Melting for Improvement in Mechanical Properties, Journal of Materials Processing Technology, 237(2016), pp. 402-408. [DOI:10.1016/j.jmatprotec.2016.06.025]
  
• R. Matsumoto, H. Tsuruoka, M. Otsu and H. Utsunomiya: Fabrication of Skin Layer on Aluminum Foam Surface by Friction Stir Incremental Forming and its Mechanical Properties, Journal of Materials Processing Technology, 218(2015), pp. 23-31. [DOI:10.1016/j.jmatprotec.2014.11.030]
  
• R. Matsumoto, S. Kanatani and H. Utsunomiya: Filling of Surface Pores of Aluminum Foam with Polyamide by Selective Laser Melting for Improvement in Mechanical Properties, Journal of Materials Processing Technology, 237(2016), pp. 402-408. [DOI:10.1016/j.jmatprotec.2016.06.025]
  
• M. Shiomi, S. Imagama, K. Osakada and R. Matsumoto: Fabrication of Aluminium Foams from Powder by Hot Extrusion and Foaming, Journal of Materials Processing Technology, 210-9(2010), pp. 1203-1208. [DOI:10.1016/j.jmatprotec.2010.03.006]

Tool Materials for Metal Forming Processes

• 松本　良, 塩見誠規, 能瀬慎也, 河合祐輔, 小坂田宏造: 傾斜機能超硬金型モデルの作製における硬さ分布の制御, 塑性と加工, 52-608(2011), 1017-1021. [DOI:10.9773/sosei.52.1017] [CiNii] (in Japanese)
• J. Kawahara, R. Matsumoto, S. Mori and K. Osakada: Predicting Fatigue Life of Carbide Tool Using Elastic-Plastic FEM, Proceedings of the 44th International Cold Forging Group Plenary Meeting, (2011), pp. 55-59.
• 松本　良, 大住勇太, 宇都宮 裕: 金型材料の熱伝導率が熱間鍛造特性へ及ぼす影響, 塑性と加工, 54-627(2013), 363-367. [DOI:10.9773/sosei.54.363] [CiNii] (in Japanese)
• R. Matsumoto, S. Mori, X. Wang and H. Utsunomiya: Tribological Characteristics of TiCN Composite and Co-Based Alloy Dies with Low Thermal Conductivity in Hot Forging, Proceedings of the 7th International Conference on Tribology in Manufacturing Processes (ICTMP 2016), (2016), pp. 88-94. [ISBN:978-616-92565-0-2]

Influence of Oxide Scale of Metals on Deformation Process

• R. Matsumoto, Y. Osumi and H. Utsunomiya: Reduction of Friction of Steel Covered with Oxide Scale in Hot Forging, Journal of Materials Processing Technology, 214-3(2014), pp. 651-659. [DOI:10.1016/j.jmatprotec.2013.10.011]
  
• H. Utsunomiya, K. Hara, R. Matsumoto and A. Azushima: Formation Mechanism of Surface Scale Defects in Hot Rolling Process, CIRP Annals - Manufacturing Technology, 63/1(2014), pp. 261-264. [DOI:10.1016/j.cirp.2014.03.022]
• R. Matsumoto, S. Harada and H. Utsunomiya: Influence of Oxide Scale Formed on Chrome Steel Surface in Steam Atmosphere on Deformation Behavior of Chrome Steel in Hot Ring Compression, ISIJ International, 55-8(2015), pp. 1711-1720. [DOI:10.2355/isijinternational.ISIJINT-2014-754]

Dieless Wall Thickening of Tube

• 松木則夫, 大谷直美, 小坂田宏造, 松本　良: 局部加熱圧縮曲げによるパイプのダイレス増肉加工, 塑性と加工, 45-519(2004), 249-253. [CiNii] (in Japanese)
  
• 松本　良, 海野陽平, 小坂田宏造, 塩見誠規: レーザ局部加熱による薄肉パイプのダイレス増肉加工, 塑性と加工, 46-530(2005), 239-243. [CiNii] (in Japanese)
  

In Situ Observation of Die-Workpiece Interface during Formning

• R. Matsumoto, Y. Nakamura and H. Utsunomiya: In Situ Observation of Re-lubrication of Die-Workpiece Interface during Forging with Ram Pulsation, Journal of Manufacturing Processes, 101(2023), pp. 675-686. [DOI:10.1016/j.jmapro.2023.06.017]

Finite Element Analysis of Metal Forming Processes

• 松本　良: スライドモーション制御鍛造プロセスの研究・開発における有限要素シミュレーションの活用, ぷらすとす, 4-39(2021), 165-169. [DOI:10.32277/plastos.4.39_165] [CiNii]
  

Machine Learning for Metal Forming Processes

• 松本　良: 機械学習の援用によるねじり付加鍛造接合の接合条件のデータ分析, 日本塑性加工学会第345回塑性加工シンポジウムテキスト, (2022), 45-51.
• 松本　良, 國澤秀介, 中村悠作, 宇都宮 裕: 潤滑膜の撮影画像の機械学習による鍛造中の膜厚の推定, 2023年度塑性加工春季講演会講演論文集, (2023), 101-102.