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1. (WO2018077318) METHOD FOR MACHINING A RACK AND RACK MACHINED ACCORDING TO SAID METHOD

Pub. No.:    WO/2018/077318    International Application No.:    PCT/DE2017/000316
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Sun Sep 24 01:59:59 CEST 2017
IPC: C21D 9/32
C21D 7/06
Applicants: MVO GMBH METALLVERARBEITUNG OSTALB
Inventors: VIEWEG, Niels
Title: METHOD FOR MACHINING A RACK AND RACK MACHINED ACCORDING TO SAID METHOD
Abstract:
The invention relates to a method for machining a rack and to a rack (1) machined according to said method, for example a steering rack. In said method, the stress pattern that is present after hardening and/or straightening the rack and that has a chaotic internal stress distribution of tensile and compressive stresses is converted into a stress pattern that optimizes the strength and the use of the material and also the diameter of the rack, such that, without altering the structure, at least the region of the gear teeth (2) is pre-stressed, in a functionally combined series of steps of a machining pass, with a deliberately introduced internal compressive stress without tensile stress and with a predominantly uniform stress distribution or stress plane.