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Studies on the Shape Optimization of Connecting Element for Hydro-Embedding

하이드로 임베딩시 체결용 연결요소의 형상 최적화 연구

  • 김봉준 (부산대학교 정밀기계공학과) ;
  • 김동규 (부산대학교 정밀기계공학과) ;
  • 김동진 (POSCO 자동차강재가공연구센터) ;
  • 문영훈 (부산대학교 정밀기계공학과/정밀정형 및 금형가공 연구소)
  • Published : 2005.12.01

Abstract

The applicability and productivity of hydroforming process can be increased by combining pre- and post-forming processes such as the bending, piercing and embedding process. For the fabrication of automotive parts, the hollow bodies with connecting nuts are widely used to connect parts together. Hollow body with connecting nuts has been conventionally fabricated by welding nuts or screwing in autobody screws. It requires multiple steps and devices fur the welding and/or screwing Therefore in this study, hydro-embedding process that combines the hydraulic embedding of connecting element(nut) with hydroforming process is investigated. Studies on the hydro-embedding technology have been performed to optimize the shape of the connecting element by analyzing the deformed mode of the embedded tube The effects of the shape of the screw tip, screw thread and shape of thread on the connection force between the tube and the connecting element have been investigated to optimize the shape of connecting element. Finite element analysis has also been performed to provide deformation behaviors of the tube surrounding a hole produced by hydro-embedding.

Keywords

References

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