Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Finite Element Springback Analysis of Vertically-Walled Auto-Body Part

수직벽을 가진 자동차 부품 성형공정의 스프링백 유한요소 해석

  • 이두환 (현대/기아 연구개발본부 금속재료연구팀) ;
  • 윤치상 (현대/기아 연구개발본부 금속재료연구팀) ;
  • 신철수 (현대/기아 연구개발본부 금속재료연구팀) ;
  • 조원석 (현대/기아 연구개발본부 금속재료연구팀) ;
  • 구본영 (한양대학교 대학원) ;
  • 금영탁 (한양대학교 CPRC)
  • Published : 2000.11.01
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Abstract

A vertically-walled auto-body part is one of the most difficult stamping parts because of angle change, wall curl, and twisting of the blank after springback as well as fracture and wrinkle. In this study, computational simulations of the vertically-walled auto-body part are carried out focusing on angle change, wall curl, and twisting after springback. Binderwrap blank shape is used in forming analysis for precise initial contacts between punch and blank. An adaptive mesh method is used in springback analysis for precise calculation of bending moments. In springback analysis, the differences of 2 and 3 dimensional analysis are compared and the effects of blank holdig force and friction coefficient are evaluated. In order to verify the validity of simulation results, they are compared with measured ones. The predicted thickness distribution and formed shape are agreed well with those of the measurement. The Predicted springback amount is less than that of the measurement.

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References

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