Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Study on the Optimum Design of the Insert Ring and Shrunk Ring of the Cold Forging Die for an Automotive Wheel Nut

자동차 휠 너트용 냉간단조 금형에서 인서트링과 보강링의 최적 설계에 관한 연구

  • Received : 2018.02.02
  • Accepted : 2018.03.28
  • Published : 2018.06.01
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Abstract

In order to increase the lifetimes of cold forging dies, insert rings are generally used. In this study, an insert ring and shrunk ring of the flange upsetting die were designed for the cold forging of an automotive wheel nut. The Stress distribution occurring in the die during forging was simulated using a commercial finite element analyzing program. The effects of the fitting interference and inclined angle of the insert ring on the compressive stress of the die inside were also investigated. The simulated data were compared with the real lifetimes of the forging dies. The maximum compressive stress acting on the edge of a forging die should have the most influence on die lifetime, an idea which could help develop the die design with the longest lifetime. The design of the most optimal forging die with the longest lifetime is made possible by analyzing the maximum inner pressure and principal stress between the shrunk ring and insert ring.

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References

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