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:
Feb. 23, 2021
Filed:
Oct. 13, 2015
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Assignee:
JFE Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 8/12 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); B32B 15/01 (2006.01); H01F 3/02 (2006.01); H01F 27/245 (2006.01); H02K 15/02 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
C21D 8/1233 (2013.01); B32B 15/011 (2013.01); C21D 8/0236 (2013.01); C21D 8/12 (2013.01); C21D 9/46 (2013.01); H01F 3/02 (2013.01); H01F 27/245 (2013.01); H01F 41/0233 (2013.01); H02K 15/02 (2013.01);
Abstract
A material for laminated iron cores is used as plural steel sheets to be overlapped with one another and punched when a laminated iron core is manufactured. A surface roughness of the steel sheets forming the material for laminated iron cores is at an arithmetic mean roughness Ra of 0.40 [μm] or less, and a sheet thickness deviation in a sheet width direction of at least a portion used as the laminated iron core is 3 [μm] or less per 500 [mm], the portion being of the steel sheets forming the material for laminated iron cores.