Transactions of the Korean Society of Machine Tool Engineers (한국공작기계학회논문집)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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A Study on the Characteristics for the Blanking of Lead Frame with the nickel alloy Alloy42

니켈합금 Alloy42를 사용하는 리드프레임의 블랭킹 특성에 관한 기초연구

  • 반갑수 (상주대학교 자동차학과) ;
  • 서의권 (상주대학교 자동차공학과) ;
  • 이광호 (상주대학교 자동차공학과) ;
  • 모창기 (상주대학교 자동차공학과)
  • Published : 2004.12.01
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Abstract

An experimental is carried out to investigate the characteristics of blanking for nickel alloy Alloy42 (t=0.203mm), a kind of IC lead frame material. By varying clearance between die and punch the shapes of shear profile are examined. Finite element analysis with element deletion algorithm for ductile fracture mode is also carried out to study the effect of clearance theoretically and to compare with experimental results. The rectangular shape specimen with four different comer radius is used to study the characteristics of blanking for straight side and comer region simultaneously. As the result the ratios measured k(m experiment of roll over, burnish and fracture zone based on initial blank thickness are compared with those of FE analysis. Both experiment and FE analysis show that the amount of mil over and fracture is increased as the clearance increases. When the radius of comer is less than thickness of blank it has been found that larger clearance is required than that of straight region in order to maintain same quality of shear profile at the comer region.

Keywords

References

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