• Title/Summary/Keyword: Preform shape optimization

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A study on the cold forging die geometry optimal design for forging load reduction (성형하중 감소를 위한 냉간단조금형 최적설계에 관한 연구)

  • Hwang, Joon;Lee, Seung-Hyun
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.32 no.6
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    • pp.251-261
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    • 2022
  • This paper describes the finite element analysis and die design change of spring retainer forging process to reduce the cold forging load and plastic forming stress concentration. Plastic deformation analysis was carried out in order to understand the forming process of workpieces and elastic stress analysis of the die set was performed in order to get basic data for the die fatigue life estimation. Cold forging die design was set up to each process with different four types analysis progressing, the upper and lower dies shapes with combination of fillets and chamfers shapes of cold forging dies. This study suggested optimal cold forging die geometry to reduce cold forging load. The design parameters of fillets and chamfers are selected geometry were selected to apply optimization with the DoE (design of experiment) and Taguchi method. DoE and Taguchi method was performed to optimize the workpiece preform shape for spring retainer forging process, it was possible to expect an increase in cold forging die life due to the 20 percentage forging load reduction.