Experimental and Numerical Study of Cold Ironing as a Post-Process of Net-Shape Manufacture of Gears

기어 정밀정형 성형을 위한 후 공정으로서의 냉간 아이어닝 공정에 대한 연구

  • 장유철 (부산대학교 대학원 항공우주공학과) ;
  • 박철성 (부산대학교 대학원 항공우주공학과) ;
  • 김병민 (부산대학교 기계공학부) ;
  • ;
  • 강범수 (부산대학교 항공우주공학과)
  • Published : 2002.10.01


Cold ironing, as a post-forging operation of warm forged gears, needs a clear understanding of form errors due to die-elasticity and springback of component. In order to simplify the analysis of cold ironing, a single tooth instead of a whole gear component was investigated. The influence of initial surface roughness, die design, and die/workpiece interference has been examined experimentally and numerically. As a result the changes in geometrical profile, dimensions, and surface finish in a single tooth were observed. This study demonstrates that predicted dimensions can be achieved and surface finish also can be greatly improved.


Cold Ironing;Net-Shape;Springback


  1. Wang Z., Dohda K. and Jeong Y., 2001, 'FEM Simulation of Surface Smoothing in the Ironing Process,' Journal of Material Processing Technology, Vol. 113, pp. 705-709
  2. Ou H. and Balendra R., 1998, 'Die-Elasticity for Precision Forging of Aerofoil Sections using Finite Element Simulation,' Journal of Materials Processing Technology, Vol. 76, pp. 56-61
  3. Amini N., Rosen B. G. and Westberg H., 1998, 'Optimization of Gear Tooth Surface,' Int. J. Mach. Tools Manuf., Vol. 38, pp. 425-435
  4. Sun C., Li S. and Wang B., 2000, 'Analysis of the Ironing of a BJ-Type Constant Velocity Joint Outer Race with the Upper Bound Element Method,' Journal of Materials Processing Techonology, Vol. 100, pp. 209-213
  5. Narasimhan N. and Lovell M., 1999, 'Predicting Springback in Sheet Metal Forming: an Explicit to Implicit Sequential Solution Procedure,' Finite Elements in Analysis and Design, Vol. 31, pp. 29-42
  6. Schunemann M., Ahmetoglu M. A. and Altan T., 1996, 'Prediction of Process Conditions in Drawing and Ironing of Cans,' Journal of Materials Processing Technology, Vol. 59, pp. 1-9
  7. Dohmann F. and Meier T., 1995, 'Production Sequence Forming-Hardening-Hard Finishing for the Manufacture of Ready-to-Install Gearing,' Proc. Of the 9th Int. Cold Forging Congress, pp. 85-93
  8. Eyercioglu O. and Dean T. A., 1995, 'Developments and Performance Analyses of Precision Forged Spur Gear,' PhD. Thesis, School of Manufacturing and Mechanical Engineering, The University of Birmingham
  9. Dean T. A., 2000, 'The Net-Shape Forming of Gears,' Materials and Design, Vol. 21, pp. 271-278