Die design for the cold forging spur gears

  • Published : 2002.02.01

Abstract

The near net shape forging of gears offers significant technical and economic advantages ever other forms of manufacture. These potential benefits can however only be realized by careful die design. This paper describes a computer-based methodology fur achieving this. A Visual-BASIC program has been developed on a rule based system that enables optimal design of the dies taking into account the elastic deflections generated in shrink-fitting the die inserts and that caused by the stresses generated in the forging process. The method also enables the profile of the spark erosion electrode to be determined. An example of the application to forging spur gears is given.

Keywords

References

  1. Advanced Technology of Plasticity v.1 Forging die Stress analysis using boundary element mehod S Takahashi
  2. Journal of Engineering Manufacture v.205 Analysis of dimensional accuracy of precision forged axi-symmetric components Sadeghi, T A Dean https://doi.org/10.1243/PIME_PROC_1991_205_066_02
  3. Annals of the CIRP v.41 Tool life and tool quality in bulk metal forming K Lange;L Cser;M Geiger;J A G Kals https://doi.org/10.1016/S0007-8506(07)63253-3
  4. In Proceeding of 5th ICTP Estimation of dimensional differences between cold forgings and tool in a backward cup extrusion of steels Kim, H;Yagi, T.
  5. Journal of Material Processing Technology v.44 A new extrusion process for helical gears: experimental study J C Choi;H Y Cho;H H Kwon https://doi.org/10.1016/0924-0136(94)90036-1
  6. Theory of eleaticity (third edition) P S Timoshenko;J N Goodier
  7. '98 Conference Proceeding of KSMTE Die design on the precision cold forging of spur gear H H Kwon;W M Jin;H S Kim
  8. International Journal of Machine Tools & Manufacture v.38 A study on the forging of external spur gears: upper-bound analysis and experiments J C Choi;Y Choi https://doi.org/10.1016/S0890-6955(98)00009-1
  9. Dies for cold extrusion of steel v.6 no.72 I.C.F.G.
  10. General aspect of tool design and tool materials for cold forging of steel v.4 no.70;82 I.C. F.G.