튜브 하이드로 피어싱시 롤 오버의 실험적 분석

Analysis on Roll Over in the Tube Hydro-Piercing Process

  • 최성기 (부산대학교 대학원 정밀기계공학과/정밀금형 및 금형가공 연구센터) ;
  • 안익태 (부산대학교 대학원 정밀기계공학과/정밀금형 및 금형가공 연구센) ;
  • 문영훈 (부산대학교 정밀기계공학과)
  • 발행 : 2004.07.01


During the tube hydropiercing, the region adjacent to the pierced hole will be deformed and will be drawn away from the die block as the punch advances through the wall of the tube. The deformation in the region may range from a substantially flat form to a countersunk form, so called rollover. In this study, the effects of material properties, shape of piercing punches, roundness of tube surface and internal pressure within the tube during piercing on the rollover have been investigated experimentally. The results provide the quantitative variation of rollover at given hydropiercing parameters, and a relationship between the deformed radius and the rollover caused by the deformation has been established.


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