Patent ID: 6936119
Filing Date: 2005-08-30
Classification: B21D,B23P,F01L,F16H,Y10S

Abstract:
1. A method for producing non-rotationally symmetric metal cam rings with a constant wall thickness along their circumference, said method comprising: providing a hot-rolled pipe of roller bearing steel; severing ring blanks of equal width from said hot-rolled pipe; mechanically machining said ring blanks on all sides to produced machined ring blanks, cold forming said machined ring blanks to produce cam rings, wherein said cold forming is performed with a forming die having first and second forming blocks, the forming die having an inner contour approximating the finished contour of the cam rings, the first forming block having an inner contour which corresponds to a half circle, the second forming block having an inner contour which roughly corresponds to a trapezoid having a height which is greater than the radius of the half circle of the first forming block;