Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Numerical Study on Forming Characteristics of Hot Multi-Point Forming Die

수치해석을 이용한 열간 가변금형 성형특성 평가

  • 이인규 (한국생산기술연구원 극한가공기술그룹) ;
  • 이성윤 (한국생산기술연구원 극한가공기술그룹) ;
  • 정명식 (한국생산기술연구원 극한가공기술그룹) ;
  • 김병민 (부산대학교 기계공학부) ;
  • 이상곤
  • Received : 2018.04.17
  • Accepted : 2018.07.12
  • Published : 2018.08.01
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Abstract

A multi-point forming die (MPFD), which has been used for producing curved plates, is capable of forming various curved plates with just one MPFD. However, in real industries, an MPFD is difficult to be adopted since the structural properties, punch strength, elastic recovery correction and dimensional accuracy become problems. In order to overcome these problems, the hot multi-point forming die (HMPFD) was proposed in this study. This HMPFD commonly provide more less spring-back and forming load than conventional MPFD. Nevertheless, this process is very difficult to form the curved plate, because the final curved shape of the plate depends on many process variables such as the punch/nozzle arrangement (height and distance), the radius of punch, contact conditions between plate and punch. In this study, the forming characteristics of HMPFD and conventional MPFD are compared with each other through the finite element analysis.

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References

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