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:
Apr. 21, 2020
Filed:
Nov. 18, 2015
Jfe Steel Corporation, Chiyoda-ku, Tokyo, JP;
Chikaumi Sawanishi, Tokyo, JP;
Yasuaki Okita, Tokyo, JP;
Hiroshi Matsuda, Tokyo, JP;
Rinsei Ikeda, Tokyo, JP;
JFE STEEL CORPORATION, Chiyoda-ku, Tokyo, JP;
Abstract
The resistance spot welding method includes performing actual welding to squeeze, by a pair of electrodes (), a sheet combination with a sheet thickness ratio of more than 3 in which a thin sheet () is overlapped on at least one face of two or more overlapping thick sheets (), and passing a current while applying an electrode force to join the sheet combination, wherein in the actual welding, a pattern of the current and the electrode force is divided into two or more steps including a first step and a second step to perform welding, and an electrode force Fin the first step and an electrode force Fin the second step satisfy a relationship1>2.