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:
Jul. 16, 2019
Filed:
Mar. 30, 2016
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Yasunobu Miyazaki, Tokyo, JP;
Fuminori Watanabe, Tokyo, JP;
Chisato Wakabayashi, Tokyo, JP;
Kunio Hayashi, Tokyo, JP;
Hiroyuki Kawata, Tokyo, JP;
Seiji Furusako, Tokyo, JP;
Sho Matsui, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
A spot welding method able to simply prevent liquid metal embrittlement cracks in spot welding of plated steel sheets, comprising, before spot welding, removing the plating at least in a zone including the inside of a circle centered at a scheduled location where the center of the nugget is formed and having an outer circumference of the inside of the outer edge of a weld affected zone or a zone at the mated surfaces of the steel sheets to be welded at the inside of a circle sharing a center of a scheduled location becoming the center of the nugget formed at the mated surfaces of the steel sheets and having an outer circumference of the inside of the outer edge of a weld affected zone.