Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)

  • 2005.06a
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  • Pages.1240-1243
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  • 2005
  • /
  • 2005-8446(pISSN)
Korean Society for Precision Engineering (한국정밀공학회)
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A Study on the Behavior of Wrinkles in Cup Drawing with Al alloy by FEM

유한요소법에 의한 합금의 용기 성형시 Al 주름의 거동에 관한 연구

  • Ko D.L. (School of Mech.&Auto. Eng., UOU) ;
  • Jeon C.Y. (School of Mech.&Auto. Eng., UOU) ;
  • Kim J.M. (School of Mech.&Auto. Eng., UOU)
  • 고대림 (울산대 대학원 기계자동차공학부) ;
  • 전치용 (울산대 대학원 기계자동차공학부) ;
  • 김진무 (울산대 기계자동차공학부)
  • Published : 2005.06.01
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Abstract

The wrinkling in the flange and wall of a part is a predominant failure mode in stamping of sheet metal parts. In many cases this wrinkling may be eliminated by appropriate control of the blank holding force(BHF), but BHF affects the draw depth. Gotoh had studied the wrinkles under $20{\mu}$ in height. In general, the height of wrinkles could be limited under $200{\mu}$ practically. Therefore small BHF can be allowed so that the depth of drawing could be increased. This paper represents the variation of the wrinkles of flange in the part of cup drawing by using aluminium alloy A1050 and A5052. This simulation is used by the explicit finite elements code $PAM-STAMP^{TM}$. The computed results are compared with the experimental results to show the validity of the analysis.

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