Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

Design of Porcess Parameters in Axisymmetric Multi-step Deep Drawing by a Finite Element Inverse Method

유한요소 역 해석을 이용한 축대칭 다단계 박판성형에서의 공정변수 설계에 관한 연구

  • 조천수 (LG전자) ;
  • 이충호 (한국과학기술원 기계공학과) ;
  • 허훈 (한국과학기술원 기계공학과)
  • Published : 1997.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

A finite element inverse method is introduced for direct prediction of blank shapes, strain distributions, and reliable intermediate shapes from desired final shapes in axisymmetric multi-step deep drawing processes. This mothod enables the determination of process disign. The approach deals with the Hencky's deformation theory. Hill's second order yield criterion, simplified boundary conditions, and minimization of plastic work with constraints. The algorithm developed is applied to motor case forming, and cylindrical cup drawing with the large limit drawing ratio so that it confirms its validity by demonstrating resonably accurate numerical results of each problem. Numerical examples reveal the reason of difficulties in motor case forming with corresponding limit diagrams.

Keywords

References

  1. Trans. ASME. J. Eng. Industry. v.56 Plastic Instability and Fracture in Sheets Stretched over Rigid Punches Keeler, S. P.;Backofen, W. A.
  2. Japan Soc. Tech. for Plasticity v.11 no.116 Deep Drawing Convex Polygon Shell Researches on the Deep Drawing of Sheet metal by the Slip Line Theory Jimma, T.
  3. Int. J. Mech. Sci. v.32 Determination of Blank Shapes for Drawing Process Design Vogel, H.;Lee, D.
  4. Int. J. Mech. Sci. v.28 no.8 Determination of Blank Shapes for Drawing Irregular Cups Using an Electrical Anlogue Method Zhaotao, Z.;Bingwen, L.
  5. Int. J. Mech. Sci. v.28 no.8 Modeling of Flange Deformation of Irregular Drawing Cups Using a Fiuid Analogy Xueshan, L.;Bingwen, L.
  6. Trans. ASME, J. Eng. Industry v.109 Further Development of Sheet Metal Forming Analysis Method Majlessi, S. A.;Lee, D.
  7. Int. J. Numer. Methods Eng v.30 Finite Element procedures for Strain Estimaitons of Sheet Metal Forming Parts Guo, Y. Q.;Batoz, J. L.;Detraux, J. M.;Duroux, P.
  8. 대한기계학회논문집(A) v.20 no.6 박판금속 성형공정에서의 블랭크 설계 및 변형률 예측 이충호;허훈
  9. ASTM STP 647 Formability Topics-Metallic Materials Levy, S.;Shinh, C. F.;Wilkinson, J. P. D.;Stinie, P.;McWilson, R. C.;B. Z. Niemeier;A. K. Schmieder;J .R. Newby
  10. 박판성형기술의 진보 축대칭 프레스가공 제품의 변형률 예측기술과 변형 여유해석에서의 적ㅇ요 박기철;남재복;최원집;양동열(편);허훈(편);김용환(편)
  11. 한국소성가공학회 '94춘계학술대회 논문집 플랜지 달린 원통형 디이프드로잉 공정설계 Expert System에 관한 연구 진인태;최재찬
  12. Proc. R. Soc. London A193 A theory of the yielding and plastic flow of anisotropic metals Hill, R.
  13. J. Mech. Phys. Solids v.1 Plastic instability under plane stress Swift, W.
  14. J. Mech. Phys. Solids v.1 On discontinuous plastic states with special reference to localized necking in thin sheets Hill, R.
  15. 박판금속의 성형 전기찬