Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2008.05a
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- Pages.316-319
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- 2008
Deformation Pattern of the Pyramid-Core Welded Sandwich Sheet Metal in L-Bending
피라미드코어재를 갖는 접합판재의 L-굽힘가공 특성
- Kim, J.H. ;
- Chung, W.J. ;
- Cho, Y.J. ;
- Kim, H.G. ;
- Hong, M.J. ;
- Yooe, J.S. ;
- Seong, D.Y. ;
- Yang, D.Y.
- 김종호 (서울산업대학교 금형설계학과) ;
- 정완진 (서울산업대학교 금형설계학과) ;
- 조용준 (서울산업대학교 금형설계학과) ;
- 김흥근 (서울산업대학교 금형설계학과) ;
- 홍명재 (서울산업대학교 금형설계학과) ;
- 유정수 ((주)성우하이텍 기술연구소) ;
- 성대용 (KAIST 기계공학과) ;
- 양동열 (KAIST 기계공학과)
- Published : 2008.05.08
Abstract
The L-bending of inner-structure bonded sandwich sheet metal is examined by using a bending die attached to the material testing machine. The specimen is composed of top and bottom layers and a middle layer of pyramid-core structure and each layer is bonded by brazing. The variables chosen for experiments were clearance between punch and die, location of bend line on the specimen surface and clamping type of specimen during L-bending. Effects of these variables on deformation of specimen around die-corner radius were investigated. It was shown that the irregular shapes of recess are formed in the inner layer of bended parts and they greatly depend on working conditions.