Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Influence of Frictional Behavior Depending on Contact Pressure on Springback at U Draw Bending

접촉 압력에 의한 마찰 특성 변화가 U 드로우 굽힘에서의 스프링백에 미치는 영향

  • 한수식 (금오공과대학교 기계공학과)
  • Received : 2011.05.19
  • Accepted : 2011.07.15
  • Published : 2011.08.01
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Abstract

Variation of contact pressure causes change of friction coefficient, which in turn changes stress distribution in the sheet being formed and final springback. In the present study, U-draw bending experiments were carried out under constant blank holding force(BHF) and different blank sizes, and finite element analysis was conducted with and without considering contact pressure effect on friction. When the BHF was sufficiently high, the degree of springback was different between constant blank holding pressure condition and that with varying blank holding pressure. Finite element analysis considering the influence of contact pressure effect on friction could explain the occurrence of springback.

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References

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