Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Multistage Cold Forging Process Design of Al6082 Considering Forming Limit

Al6082의 가공한계를 고려한 냉간단조 공정설계

  • Ann, Ku-Hee (Department of Mechanical Engineering, Gradute School, Chungbuk University) ;
  • Kang, Jong-Hun (Department of Aeromechanical Engineering, Jungwon university) ;
  • Heo, Su-Jin (Taejung Technical MFG CO.,LTD., Institute of Technology) ;
  • Shin, Tae-soo (Taejung Technical MFG CO.,LTD) ;
  • Cho, Hae-Yong (Department of Mechanical Engineering, Chungbuk University)
  • 안규희 (충북대학교 대학원 기계공학과) ;
  • 강종훈 (중원대학교 항공기계공학과) ;
  • 허수진 ((주)태정기공 기술연구소) ;
  • 신태수 ((주)태정기공) ;
  • 조해용 (충북대학교 기계공학부)
  • Received : 2020.07.22
  • Accepted : 2020.08.22
  • Published : 2020.09.30
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Abstract

Recently, as the weight reduction of vehicles has been actively progressed, parts developed using aluminum 60XX series from existing steel materials are increasing. In this paper, the bushing used for the front frame rail, which is one of the parts for fixing engines and other parts in automobiles, was changed to an aluminum material of the Al60XX series, and it was intended to be produced by applying of cold forging method. The bushing is a part that secures the engine frame, and in order to produce it by cold forging, the molding limit is predicted through process design, and a multi-stage process is designed through finite element analysis. In addition, in order to verify the feasibility of the designed forging process, the limits of the multi-step process were verified based on the Cockcroft Latham theory, and the crack and overlap of the actual forging work were predicted and improved.

Keywords

References

  1. "Toishi.info", Japan Aluminium Association
  2. Murty, S. N., Rao, B. N., & Kashyap, B. P., "Improved ductile fracture criterion for cold forming of spheroidised steel", Joumal of materials Processing Technology, Vol. 147, No. 1, pp. 94-101, 2004. https://doi.org/10.1016/j.jmatprotec.2003.12.002
  3. Rao, A. V., & Ramakrishnan, N., "A comparative evaluation of the theoretical failure criteria for workability in cold forging", Journal of materials Processing Technology, Vol. 142, No. 1, pp. 29-42, 2003. https://doi.org/10.1016/S0924-0136(03)00432-1
  4. Jeysingh, J. J. V., Rao, B. N., & Reddy, A. C., "Development of a ductile fracture criterion in cold forming", Material Scienced Research Journal, Vol. 2, pp. 191-206, 2008.
  5. Joun, M. S., Choi, I. S., Eom, J. G, Lee, M. C., "Finite element analysis of tensile testing with emphasis on necking", Computational Materials Science, Vol. 41, pp. 63-69, 2007. https://doi.org/10.1016/j.commatsci.2007.03.002
  6. Joun, M. S., Eom, J. G, Lee, M. C., "A new method for acquiring true stress-strain curves over a large range of strains using a tensile test and finite element method", Mechanics of Materials Vol. 40, pp. 586-593, 2008. https://doi.org/10.1016/j.mechmat.2007.11.006
  7. Chio, I. S., Eom, J. G., Lee, M. C., Joun, M. S., "Analysis of the Tensile Test by the Rigid-Plastic Finite Element Method", Transactions of Materials processing, pp. 371-377, 2006.
  8. Wyatt, J. E., Berry, J. T., "A new technique for the determination of superficial residual stresses associated with machining and other manufacturing processes", Journal of Materials Processing Technology, Vol. 171, pp. 132-140, 2006. https://doi.org/10.1016/j.jmatprotec.2005.06.067
  9. Kim, H. S., Kim, S. H., Ryu, W. S., "Finite element analysis of the onset of necking and the post-necking behaviour during uniaxial tensile testing", Materials Transactions, Vol. 46, pp. 2159-2163, 2005. https://doi.org/10.2320/matertrans.46.2159
  10. Chu, S. J., "True stress-true strain curves obtained by tensile tests using finite element program", Transactions of the KSME.A, pp. 25-31, 2011.

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