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Finite Element Analysis of Punch Forming of Superplastic Materials

초소형재료의 펀치성형에 관한 유한요소해석

  • Huh, Hoon (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Ki-Seok (Dept. of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Choi, Yeong-Jun (Agency for Defense Development)
  • 허훈 (한국과학기술원 기계공학과) ;
  • 이기석 (한국과학기술원 기계공학과) ;
  • 최영준 (국방과학연구소)
  • Published : 1996.02.01

Abstract

Superplastic punch forming of sheets is simulated by a finite element method to obtain the optimal punch speed and the related deformed shapes. The punch forming has an advantage of guaranteeing the desired accuracy inside a product and controlling the thichness of a deformed sheet more accurately than blow forming. The finit element code developed is associated with the contact algorithm and the control algorithm of punch speed for the optimum forming. The simulation demonstrates that the variation of the thichness in a blank sheet affects the punch speed and the final distribution of the thichness in a product. The analysis proposes that a ring-typed thichness controller is very effective in controlling the thichness of a deformed sheet appropriately.

Keywords

Superplastic Material;Punch Forming;Optimal Punch Speed Control Method;Thickness Control Ring

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