Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Development of Prediction Model for Sidewall Curl in Sheet Meta1 Forming(II)-Experimental Validation

박판성형시 컬 예측모델 개발(II)-실험적 검증

  • 주병돈 (부산대학교 정밀기계공학과) ;
  • 박현규 (부산대학교 정밀기계공학과) ;
  • 김동우 (부산대학교 정밀기계공학과) ;
  • 문영훈 (부산대학교 정밀기계공학과/정밀정형 및 금형가공)
  • Published : 2007.10.01
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Abstract

Sidewall curl is the curvature that results from non-uniform through-thickness strain present in the sheet stamping process which involves material flow over a die radius. In order to understand and control curl for tight fit-up tolerances, an analytical model that can provide a reliable measure for the amount of curl would be very helpful. In this study, a model is developed based on the moment-curvature relationship during bending-under-tension operations. For the verification of analytical model, sidewall curl is experimentally measured after deformation of a strip using a bending-under-tension test system. The results show a consistent relationship between the theoretically predicted value and the experimentally obtained one, especially in regions of high curl.

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References

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