Studies on the forming limits for optimization of the tool path in Dieless incremental sheet metal forming

무금형 점진 판재 성형에서 공구경로 최적화를 위한 성형한계에 관한 연구

  • 이승진 (한국기계연구원 소재성형연구센타) ;
  • 김민철 (한국기계연구원 소재성형연구센타) ;
  • 이영선 (한국기계연구원 소재성형연구센타) ;
  • 권용남 (한국기계연구원 소재성형연구센타) ;
  • 이정환 (한국기계연구원 소재성형연구센타)
  • Published : 2005.05.01

Abstract

Recently, as the industrial demand for small quantity batch production of sheet metal components, the application of dieless forming technology to production of these component rise with the advantages of the reduction in manufacturing cost and time. In dieless forming processes, the determination of moving path of tool plays an important role in producing successfully formed parts. In order to obtain the optimized moving path of tool avoiding forming failure, it is necessary to examine the forming limit of sheet material. Therefore, in this study, as the new criterion to evaluate the formability of sheet material in dieless forming processes FDD(feeding depth diagram) with respect to feeding depth and punch diameter is proposed. Thus, the FDD for the sheet materials of STS304 and Ti-grade2 were obtained from a series of FDT(feeding depth test). In addition the possibility of the application of FLD in judging forming severity in dieless forming processes was investigated by comparing the results of FE analyses based on FLD and experimental FDT.

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