Development of precise clutch gear for automobile transmission by compound forging process

복합단조공법을 이용한 자동차 트랜스미션용 클러치 기어 개발

  • 이광오 (부산대학교 정밀기계공학과) ;
  • 김정민 (부산대학교 정밀기계공학과) ;
  • 제진순 (경상대학교 수송기계공학부) ;
  • 강성수 (부산대학교 정밀정형 및 금형가공연구센터)
  • Published : 2006.01.01

Abstract

A manufacturing process for a clutch gear which demands high strength and wear resistance, was developed by means of computer simulation. A preform was made by hot forging process and subsequent cold sizing process is applied to complete precise tooth part. Processes to obtain high dimensional accuracy and superior mechanical properties are analyzed and optimal heat treatment cycle to improve cold forgeability is introduced. Prototype was produced and the dimensional accuracy of the prototype was inspected to verify proposed process.

Keywords

References

  1. Dean, T. A., 'The net-shape forming of gears,' Materials and Design, Vol.21, pp. 271-278, 2000 https://doi.org/10.1016/S0261-3069(99)00074-6
  2. Kang, M. S., Jeon, M. S., Kim, J. U., Kang, S. M. and Jeon, B. R., 'Forging Simulation, Pulley-Type Forging, Compound Forging Process, Spring Attached Die, Rigid-Plastic Finite Element, Method,' KSTP, Vol. 14, No. 1, pp. 66-71, 2003
  3. Onodera, S, Sawai, K. 'Modern cold forging applications for the manufacture of complex automotive parts,' J.Mater.Process.Technol, Vol.46, pp. 169-183, 1994 https://doi.org/10.1016/0924-0136(94)90109-0
  4. Onodera, S., Sawai, K., 'Current cold-forging techniques for the manufacture of complex precision near-net-shapes,' J.Mater.Process.Technol, Vol.35, pp. 385-396, 1992 https://doi.org/10.1016/0924-0136(92)90329-Q
  5. Cho, H. Y., Min, G. S., Jo, C. Y. and Kim, M. H., 'Process design of the cold forging of a billet by forward and backward extrusion,' J.Mater.Process.Technol, Vol.135, pp. 375-381, 2003 https://doi.org/10.1016/S0924-0136(02)00870-1
  6. Behrens, B. -A., 'Cold Sizing of Cold- and Hot Formed Gears,' Annals of the CIRP, pp. 239-242, 2004 https://doi.org/10.1016/S0007-8506(07)60688-X
  7. Kim, H. K., Sunami, F. and YAMANAKA, M., 'Computer Simulation and Tool Manufacturing Technology which support Net shape Manufacturing in Forging Industry,' J. Japan Society for Technology of Plasticity, Vol. 41, No. 477, pp. 1014-1020, 2000
  8. Li, G., Jinn, J. T., Wu, W. T. and Oh, S. I., 'Recent development and applications of three-dimensional finite element modeling in bulk forming processes,' J.Mater.Process. Technl., Vol. 113, pp. 40-45, 2001 https://doi.org/10.1016/S0924-0136(01)00590-8
  9. Lee, S. M., Wnag, S. I., Kim, H. R. and Bae, W. B., 'A Study on the Production of a Compressor Piston for an Automobile Air-Conditioner using Aluminum Casting/Forging,' J. of the Korean Society of Precision Engineering, Vol.7, No.8, pp. 53 -59, 2000
  10. ASM HANDBOOK, Vol. 4 Heat Treating