Parameter Investigation of Burr Formation on Sheet Metal Shearing Process

미세박판 전단시의 버 발생 인자에 관한 연구

  • 김헌영 (강원대학교 기계 메카트로닉스공학부) ;
  • 김병희 (강원대학교 기계 메카트로닉스공학부) ;
  • 신용승 (강원대학교 기계 메카트로닉스공학부 대학원) ;
  • 오수익 (서울대학교)
  • Published : 2001.05.01

Abstract

Shearing, including blanking, trimming, piercing, etc, is one of the most frequently used processes in sheet metal manufacturing. In this paper, an individual set of tooling with an in-die sensor was designed and precisely fabricated to carry out the experiment for the shearing process investigation. Through various experiments, it has been examined the influence of process parameters such as clearance, edge material properties and pad configuration. Since the tension between the part and the scrap increases when the clearance increases, the clearance should be selected properly in order to reduce the burr height. Also removal of the lower pad makes the sheared surface worse and the shearing system unstable. The shearing force increases when the clearance decreases and the friction of the tooling material decreases. Dynamic reaction force is also important to obtain the fine sheared surfaces.

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