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. 13, 2018
Filed:
Dec. 17, 2013
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
NSK LTD., Tokyo, JP;
Abstract
Provided is a grinding method capable of preventing variation in the outer diameter of a processed objectat the completion of grinding regardless of change in the amount of elastic deformation of the processed objectbased on the change in the cutting ability of a grindstone. The outer diameter D of the processed objectduring grinding is measured by gauge headsin process. Plural target values Dthat differ from each other are set for the outer diameter D of the processed object, and first threshold values are set for the rate of change of the outer diameter D of the processed object for each of these target values D. Spark out is started when the outer diameter D of the processed objectbecomes equal to a target value Dand the absolute value of the rate of change v is greater than a first threshold value that corresponds to the target value D.