Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Investigation on the Flow Control in Forward-Backward Extrusion of Piston-Pin for Automobile

자동차용 피스톤 핀의 전.후방압출에서 유동제어에 관한 실험적 연구

  • 박종남 (부산대학교 일반대학원 정밀기계공학과) ;
  • 박태준 (부산대학교 일반대학원 정밀기계공학과) ;
  • 김동환 (부산대학교 정밀정형 및 금형가공연구센터) ;
  • 김병민 (부산대학교 기계공학부)
  • Published : 2002.07.01
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Abstract

In cold forging of piston-pin for automobile parts, the flow defect appears by the dead metal zone. This appearance evidently happens in products with a thin piercing thickness for the dimension accuracy and the decrease of material loss. The best method that can prevent flow defect is removing dead metal zone. The purpose of this study is to investigate the material flow behavior of forward-backward extruded piston-pin through the relative velocity ratio and the stroke control of upper moving punch & container using the flow control forming technique. The finite element simulations are applied to analyse the flow defect, then the results are compared with the plasticine model material experiments. The model experiment results are in good agreement with the FE simulation ones.

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References

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