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Flow behavior dependence of rod shearing phenomena of various materials in automatic multi-stage cold forging

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Abstract

Strain hardening, elongation, and shearing speed effects of flow behaviors on coil-rod shearing during automatic multi-stage cold forging (AMSCF) are experimentally investigated. AMSCF machines and an experimental apparatus with a universal testing machine are utilized. Various coil materials are tested, including A6061-T6, SWCH10A, SCM435, and SCM415. The former is used to investigate the elongation and shearing speed effects on the sheared surface features. The latter is used to reveal the dependence of shearing phenomena on strain hardening and elongation. The new findings show the strong dependence of coil-rod shearing phenomena and surface features on flow behaviors and shearing speed. They will lead the engineers to the optimized shearing process design.

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Acknowledgments

This work was partly supported by Industrial Strategic Technology Development Program (Development and application of die lifetime early warning system for smart and intelligent process of cold forging, 1415178141, 20003950, Ministry of Trade, Industry & Energy) and Korea Institute of Energy Technology Evaluation and Planning (KETEP) (Human Resource Development Project in Circular Remanufacturing Industry, 2021400 0000520) grant funded by the Korea government (MOTIE).

Author information

Authors and Affiliations

  1. Sungjin Foma Co., Ltd, Daegu, 42709, Korea

    Kwang Min Kim

  2. Graduate School of Mechanical and Aerospace Engineering, Gyeongsang National University, Jinju, 52828, Korea

    Su Min Ji

  3. Gyeongnam Technopark, Changwon, Gyeongnam, 51395, Korea

    Seong Won Lee

  4. Department of Automotive and Mechanical Engineering, Kongju National University, Cheonan, 31080, Korea

    Seok Moo Hong

  5. ERI, School of Mechanical and Aerospace Engineering, Gyeongsang National University (GNU), Gyeongnam, Jinju, 52828, Korea

    Man Soo Joun

Authors
  1. Kwang Min Kim
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  2. Su Min Ji
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Corresponding author

Correspondence to Man Soo Joun.

Additional information

Kwang Min Kim is working for Sungjin Foma, Daegu, Korea. He is also a graduate student of the Department of Material Processing Engineering of Gyeongsang National University, Jinju, Korea. He received his M.S. degree from the same department. His major research interest is the optimized process and die designs in automatic multi-stage cold forging using metal forming simulation technologies.

Su Min Ji is a graduate student of the School of Mechanical and Aerospace Engineering of Gyeongsang National University. He studied mechanical engineering in the Department of Mechanical Engineering at Gyeongsang National University for his B.S. degree. His research interests include high-cycle fatigue fracture, titanium forging, incremental forming, and material modelling.

Seong Won Lee is a researcher at Gyeongnam Technopark, Changwon, Korea. He received his Ph.D. in the Department of Mechanical Engineering from Gyeongsang National University. His major research interests involve metal forming simulation, experiments, and practical applications.

Seok Moo Hong is currently a Professor in the Department of Automotive and Mechanical Engineering, Kongju National University, South Korea. He received his B.S. and M.S. degrees from the Department of Mechanical Engineering, Sogang University, Seoul, South Korea, in 1999 and 2001, respectively. He then went on to receive his Ph.D. (Dr.-Ing.) from the Technical University of Munich, Munich, Germany. Dr. Hong has worked for the Global Technology Research Center for Samsung Electronics in South Korea as a Principal Engineer. Dr. Hong’s research interests include metal forming plasticity, computer-aided process analysis, artificial intelligence, machine learning, and optimal design.

Man Soo Joun is a Professor at the School of Mechanical and Aerospace Engineering of Gyeongsang National University, Jinju, Korea. He received his Ph.D. from the Department of Mechanical Engineering of Pohang University of Science and Technology (POSTECH), Pohang, Korea. His major interests lie in metal forming simulation technologies with an emphasis on their industrial applications, specifically including flow analysis, heat transfer analysis, metallurgical analysis, process modelling and design optimization, and flow and metallurgical modellings.

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Kim, K.M., Ji, S.M., Lee, S.W. et al. Flow behavior dependence of rod shearing phenomena of various materials in automatic multi-stage cold forging. J Mech Sci Technol 37, 139–148 (2023). https://doi.org/10.1007/s12206-022-1214-3

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  • DOI: https://doi.org/10.1007/s12206-022-1214-3

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