Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study on the Elimination of Surface Defect and Increase in Tool Life of the Warm Forged Spider

온간 스파이더 표면결함 개선과 금형수명 향상에 관한 연구

  • Kang, Jong-Hun (School of Aero-Mechanical Engineering, Jungwon UNIV.)
  • 강종훈 (중원대학교 항공기계공학과)
  • Received : 2020.01.28
  • Accepted : 2020.04.05
  • Published : 2020.05.31
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Abstract

Due to the complicated shape of the spider, the production method was changed from cold to warm forging. Finite element analysis was performed to predict the forging load and shape using the enclosed hydraulic die set. As the forging load increases due to the spider die volume, die stress analyses were performed to optimize the die design in order to reduce the die stress in various conditions. Large deformation while producing the complicated forging parts induces high forging load, which is one of the main parameters of the forging surface defects. The forging process was analyzed to find out the root cause of the surface defects generated during the spider production for various parameters, thereby revealing that the radius of die in the defect zone influenced the air trap depth, being the root cause of the surface defect. It was verified that die life was increased and the surface defect was eliminated by changing the die design during the mass production test.

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References

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