Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Effect of Process Parameters on Forming Characteristics of Flange Hydroforming Process

플랜지 형성 액압성형시 공정변수에 따른 성형 특성

  • 이호진 (부산대학교 기계공학부/정밀정형 및 금형 가공 연구소) ;
  • 주병돈 (부산대학교 기계공학부/정밀정형 및 금형 가공 연구소) ;
  • 최민규 (부산대학교 기계공학부/정밀정형 및 금형 가공 연구소) ;
  • 문영훈 (부산대학교 기계공학부,)
  • Received : 2009.12.04
  • Accepted : 2010.02.23
  • Published : 2010.04.01
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Abstract

Hydroforming is the technology that utilizes hydraulic pressure to form tube or sheet materials into desired shapes inside die cavities. Tube hydroforming provides a number of advantages over the conventional stamping process, including fewer secondary operations, weight reduction, assembly simplification, adaptability to forming of complex structural components and improved structural strength. In many case, hydroformed parts have to be structurally joined at some point. Therefore it is useful if the hydroformed automotive parts can be given a localized attachment flange. In this study for the numerical process design FE analysis was performed with DYNAFORM 5.5. Die parting angle and circumferential expansion ratio was optimized. With optimized condition, bulge and hydroforming experiments to form flange were performed. Forming characteristic at various pressure conditions was analyzed and optimized internal pressure condition was evaluated. The results show that flanged parts can be successfully produced by tube hydroforming process.

Keywords

References

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  1. Analysis of Defect Characterization in a Rectangular Shape Flange Hydroforming Process vol.22, pp.5, 2013, https://doi.org/10.5228/KSTP.2013.22.5.275