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. 19, 2019
Filed:
Mar. 06, 2014
Jfe Steel Corporation, Tokyo, JP;
Muneo Matsushita, Tokyo, JP;
Rinsei Ikeda, Tokyo, JP;
JFE Steel Corporation, , JP;
Abstract
An oval nugget can reliably be obtained with this indirect spot welding method. In this indirect spot welding method, an electrode end portion of a welding electrode includes a tip of the welding electrode, and as viewed from the tip, the electrode end portion has a two-step dome shape formed by a first curved surface with a curvature radius r(mm) located within a range of a circle of radius R (mm) centering on the tip and a second curved surface with a curvature radius r(mm). 2√t≤R≤6√t (1), 30≤r(2), and 6≤r≤12 (3), where t is the sheet thickness (mm) of a thinner metal sheet.