Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Drawing Strain Distribution Model for the Two-Pass Drawing Process

2단 튜브인발 공정시 인발변형률 배분모델 재발

  • 이동활 (부산대학교 정밀기계공학과) ;
  • 정우창 (부산대학교 고장분석 및 신뢰성연구센터) ;
  • 문영훈 (부산대학교 정밀기계공학과)
  • Published : 2004.12.01
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Abstract

For the large reduction in tube cross section, the tube drawing process is usually performed by two successive passes, so called first drawing and second drawing. In multi-pass drawing process, the reduction balance is important to prevent drawing cracks. Therefore in this study, the model for uniform reduction distribution in two-pass drawing process has been developed on the basis of cross sectional variation of drawn tube. For the given product geometry the model provides optimal diameter and thickness that can evenly distribute drawing reductions. The capability of model is well confirmed by finite element analysis of tube drawing process. Criteria curves at various limit strains to determine whether the drawn tube would fail during drawing process are also proposed by using newly developed model.

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References

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