Method of manufacturing a steering rack

Details Method of manufacturing a steering rack Method of manufacturing a steering rack

2011-05-31

2011-05-31

Bryant, David P (Department: 3726)

Metal working

Method of mechanical manufacture

Structural member making

C029S893340, C029SDIG018, C072S370130, C072S370190

Reexamination Certificate

active

07950153

ABSTRACT:
A method of manufacturing a steering rack for a vehicle rack and pinion steering system. The rack comprises gear teeth and a shank that has a constant outside diameter and constant wall thickness over the majority of its length. The method comprises performing a forging operation on a tubular member with an elongate member positioned in the bore of a thickened region of the tubular member. The forging operation forms the gear teeth on the thickened region, and the elongate member is retained within the tubular member. The tubular member is made by performing a forming operation on a length of tube stock such that the outside diameter of the thickened region is smaller than the outside diameter of the shank, and the wall thickness of the thickened region is larger than the wall thickness of the shank.

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