The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 2016
Filed:
Oct. 25, 2012
Aktiebolaget Skf, Göteborg, SE;
Juergen Gegner, Forchheim, DE;
Udo Krug, Theres, DE;
Armin Olschewski, Schweinfurt, DE;
Arno Stubenrauch, Aidhausen, DE;
AKTIEBOLAGET SKF, Gothenburg, SE;
Abstract
A method for manufacturing a raceway element of a bearing assembly includes hardening a raceway element having a raceway surface by at least partially heating the raceway element, deep rolling the raceway surface using a first rolling element, and then deep rolling the raceway surface using a second rolling element. The first rolling element has at least one different dimension than the second rolling element. In the resulting raceway element, compressive residual stresses of at least 400 MPa are present at a depth from the raceway surface of 200 μm or less, and between the raceway surface and a depth of 100 μm from the raceway surface, the amount of the compressive residual stresses changes by 500 MPa or less.