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Preform design of hybrid-forming process to make sheet metal IT products with a sharp edge

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Abstract

Existing forging processes have limitations in forming products with sharp edges. Therefore, a new hybrid-forming process that combines drawing and forging processes was designed to form a sharp-edged product. First, a corner radius of a preform design was arranged to be smaller than the minimum bent area corner radius formed in general drawing processes. Then, the shape of the preform was planned to have the exact shape of the final product. Given that forming loads are a limiting condition in forging processes, they were set as an evaluation criterion to determine design requirements for final product shapes and the shapes of preforms. The reliability of finite element analysis results was verified by comparing analysis and experiment results, and a multistage preforming process was implemented to satisfy the determined evaluation criterion. This study demonstrates that IT products with sharp edges can be formed.

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Authors and Affiliations

  1. School of Mechanical Engineering, Sogang University, Seoul, 121-742, Korea

    Hyunsoo Jeong, Seunghyeon Cheon & Naksoo Kim

  2. Department of Mold Design Engineering, Kongju National University, Gongju, 314-701, Korea

    Seokmoo Hong

Authors
  1. Hyunsoo Jeong
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  2. Seunghyeon Cheon
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  3. Seokmoo Hong
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  4. Naksoo Kim
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Corresponding author

Correspondence to Naksoo Kim.

Additional information

Recommended by Editor Haedo Jeong

Hyunsoo Jeong received his B.S. degree from the Department of Mechanical Engineering, Sogang University, Seoul, South Korea in 2012. He received his M.S. degree from the Department of Mechanical Engineering, Sogang University, Seoul, South Korea in 2014. His research interests are shape manufacturing and computer-aided process analysis.

Naksoo Kim is currently a professor at the Department of Mechanical Engineering, Sogang University, Seoul, South Korea. He received his B.S. and M.S. degrees from the Department of Mechanical Design, Seoul National University, Seoul, South Korea in 1982 and 1984, respectively. He received his Ph.D. from UC Berkeley, California, USA. Dr. Kim has worked for the Engineering Research Center for Net Shape Manufacturing at Ohio State University as a senior researcher and at Hongik University as an assistant professor. Dr. Kim’s research interests are metal forming plasticity, computer-aided process analysis, and optimal design.

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Jeong, H., Cheon, S., Hong, S. et al. Preform design of hybrid-forming process to make sheet metal IT products with a sharp edge. J Mech Sci Technol 29, 2467–2475 (2015). https://doi.org/10.1007/s12206-015-0541-z

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  • DOI: https://doi.org/10.1007/s12206-015-0541-z

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