Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Finite Element Analysis on the Springback in the Forging-Bending of Metal Micro-Wire

금속 마이크로 와이어의 단조-굽힘 성형에서 스프링백에 관한 해석적 연구

  • 강정진 (한국생산기술연구원 정밀금형팀) ;
  • 홍석관 (한국생산기술연구원 정밀금형팀) ;
  • 전병희 (인덕대학 기계설계) ;
  • 표창률 (인덕대학 기계설계)
  • Published : 2008.12.01
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Abstract

Springback is one of factors affecting precision in metal forming. Its effect is particularly prominent in bending process. In this study, bending and forging process are used in order to manufacture a micro spring with two bending region from $60{\mu}m$ diameter wire. Springback in the process lowers the precision of the micro spring. Overbending for springback compensation has wide usage in a general way. However, this method requires repeated modifications of press dies until the tolerance is allowable, which causes that production cost and time increase. In this paper, we analyzed the mechanism of springback in the forming process of the micro spring using finite element method. In addition, a simple method to control springback without modifying dies was proposed by performing numerical analysis with various parameters.

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References

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