Usefulness Verification for Flexible Stretch Forming Process using finite Element Method

유한요소법을 이용한 가변 스트레치 성형공정의 적합성 검증

  • 서영호 (부산대학교 항공우주공학과 대학원) ;
  • 허성찬 (부산대학교 항공우주공학과 대학원) ;
  • 박중원 (부산대학교 항공우주공학과 대학원) ;
  • 송우진 (부산대학교 산학협력단) ;
  • 구태완 (부산대학교 항공우주공학과) ;
  • 김정 (부산대학교 항공우주공학과) ;
  • 강범수 (부산대학교 항공우주공학과)
  • Published : 2009.10.08

Abstract

This paper deals with a usefulness verification of stretch forming process using flexible die. The stretch forming method is widely used in aircraft and high-speed train industries for manufacturing of skin structure, which is made of sheet metal. A great number of solid dies are originally used and developed for specific shapes with respect to different curvature radii of the skin structures. Accordingly, flexible stretch forming process is proposed in this study. It replaces the conventional solid dies with a set of height adjustable discrete punches. A usefulness of the flexible die is verified through extensive numerical simulations of the stretch forming process for simply curved sheet plate. The elastic recovery is considered and formability evaluations are conducted through a comparison of symmetry plane configurations.

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