Patent ID: 6398886
Filing Date: 2002-06-04
Classification: B21K,C21D,F16D,Y10S

Abstract:
A method of finishing outer joint parts for constant velocity joints formed in a non-cutting way, said outer joint parts having a longitudinal axis and an inner recess which extends in the direction of the longitudinal axis and which, in the direction of the longitudinal axis, is substantially undercut-free, with the inner recess being provided with tracks which comprise contact zones for the rolling contact of rolling members, the method comprising the following steps:non-cutting forming the outer joint part; surface-layer-hardening the inner recess at least along the length of the contact zones, for the purpose of producing a hardened surface layer, at least in the region of the contact zones, above an unhardened matrix; and calibrating the contact zones in respect of their radial positions and axial linearity by displacing the hardened surface layer in the region of the contact zones within the unhardened matrix.