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:
Nov. 27, 2018
Filed:
Apr. 22, 2014
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
NSK Ltd., Tokyo, JP;
Abstract
Provided is a method for manufacturing a bearing ring member, whereby processing cost can be reduced and a high degree of freedom in design is obtained, by disposing a metal material of a raw material (), the metal material having excellent metal characteristics such as fatigue strength and wear resistance and excellent processing characteristics such as hardenability, in a portion that flows to a portion (raceway surface, etc.) where the characteristics of the metal material are required during use or forging of a bearing ring member. The present invention is configured from a first metal part () in which the raw material () is formed in a cylindrical shape, and a second metal part () formed in a columnar shape by a metal material having more excellent metal characteristics or processing characteristics than the first metal part (). For example, the second metal part () is disposed in a portion on an inside diameter side of the first metal part (), which is a portion of the raw material () that flows to an outer raceway () of an outer ring () during forging.