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스프링 힘에 의한 배압부가 단조 공정의 3차원 유한요소해석

Three-Dimensional Finite Element Analysis of Forging Processes with Back Pressure Exerted by Spring Force

  • 장성민 ((사)경상대학교 수송기계부품기술혁신센터) ;
  • 김민철 (경상대학교 기계공학과 대학원) ;
  • 이민철 (경상대학교) ;
  • 전병윤 (진엔지니어링) ;
  • 전만수 (경상대학교 기계항공공학부/항공기부품기술연구소)
  • 투고 : 2010.03.22
  • 심사 : 2010.06.25
  • 발행 : 2010.08.01

초록

In this paper, back pressure forging processes of which back pressures are exerted by mechanical forces including spring reaction are simulated by three-dimensional finite element method. The basic three-dimensional approach extended from two-dimensional approach is accounted for. An axisymmetric backward and forward extrusion process having a back pressing die, which is exposed to oscillation of forming load due to variation of reduction ratios with stroke and its related frequent variation of major deforming region, is simulated by both two and three dimensional approaches to justify the presented approach by their comparison. A three-dimensional forging process having a back pressing die attached to the punch by a mechanical spring is simulated and the results are investigated to reveal accuracy of the presented approach.

키워드

참고문헌

  1. H. Ando, K. Miyoshi, 2000, Net Shape Forging (Backpressure Forging), Journal of The Society for Technology of Plasticity, Vol. 41, No. 477, pp. 990-994.
  2. S. H. Choi, B. Y. Jun, M. C. Lee, R. H. Park, J. G. Eom, M. S. Joun, 2006, Development of a Double-Action Link-Type Hydraulic Die Set for Enclosed Die Forging, Trans. Mater. Technol. Plast., Vol. 15, No. 5, pp. 373-381.
  3. B. Y. Jun, J. H. Lee, J. G. Eom, J. H. Park and M. S. Joun, 2007, Forging of Long Hollow Shafts of Hardto-Form Material by Hollow Shaft Extrusion after Piercing with Back Pressing, Proc. Kor. Soc. Tech. Plast. conf., pp. 338-343.
  4. M. S. Joun, S. W. Lee, J. H. Chung, 1998, Finite element Analysis of a Multi-stage Axisymmetric forging Process having a Spring-Attached die for Controlling Metal flow lines, Int. J. Mech. Tools and Manu., Vol. 38, No. 7, pp. 843-854. https://doi.org/10.1016/S0890-6955(97)00044-8
  5. http://www.afdex.com