Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지

A COLD FORGING OF HELICAL GEAR FOR STEERING PINION

  • Kim M.E. (DAERIM Metal Technology Industry Co. Ltd.) ;
  • Kim Y.G. (DAERIM Metal Technology Industry Co. Ltd.) ;
  • Choi S. (Korea Institute of Industrial Technology) ;
  • Na K.H. (Korea Institute of Industrial Technology) ;
  • Lee Y.S. (Korea Institute of Machinery and Materials) ;
  • Lee J.H. (Korea Institute of Machinery and Materials)
  • Published : 2003.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The precision cold forging of helical gear for steering pinion has been studied. Because of the large helix angle, there are many difficult problems to control the material flow and part dimension. The die shape was proposed to improve the flow of workpiece. In order to improve the dimensional accuracy of forged part, a FE analysis was performed. The proposed die shape drives to flow amicably workpiece. The applied load was reduced up to 10 percent, compared to the conventional-shaped-die. The elastic deformation of die has been investigated quantitatively by the 3-dimensional FE analysis. The die-land has been expanded up to $10{\mu}m$ on loading stage, based on the FEM results. Therefore, the elastic deformation amounts should be taken into consideration to improve the dimensional accuracy of forged helical gear.

Keywords