Patent ID: 6896290
Filing Date: 2005-05-24
Classification: B21C,B21D,B62D

Abstract:
1. A method of manufacturing of a steering gear shaft including at least one crash-deformable section formed as a corrugated tube, at least a portion of a longitudinal extent of which contains at least one of corrugation crests of the corrugated tube, is formed of at least two layers; and at least one universal joint provided at an end of the corrugated tube, the method comprising the steps of: providing at least two tubes for forming the at least two layers of the corrugated tube at least one of which has, in a region in which in a completed condition of the corrugated tube, corrugations are formed, regions of different thicknesses with the thicknesses of the different regions diminishing from the end of the corrugated tube at which the at least one universal joint is to be provided to an opposite end; pushing the two tubes one into the other; and thereafter forming the corrugations, whereby in the completed condition of the corrugated tube, a wall thickness of at least one layer in at least one of the corrugation crests and a respective adjacent corrugation trough diminishes over a region of the at least one of the corrugation crests and the respective adjacent corrugation trough between a side of the corrugation tube adjacent to the universal joint and a side of the corrugation tube remote from the universal joint.