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:
Aug. 25, 2026
Filed:
Nov. 21, 2023
Jfe Steel Corporation, Tokyo, JP;
Naoaki Munemura, Tokyo, JP;
Koichi Taniguchi, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
An object is to provide a friction element welding method. A friction element welding method performs joining of a sheet assembly including two or more stacked metal sheets by pressing an element provided with a tip angle into the sheet assembly while rotating the element. The method includes an oxide film removal step of bringing the bottom surface of the element into contact with an oxide film on the top surface of the lowermost metal sheet in the sheet assembly, and removing the oxide film. The element used in the oxide film removal step is such that the elevation angle of the tip angle of the element satisfies a predetermined conditional expression depending on the element diameter, the pressurizing force, the rotational speed, and the tensile strength of the lowermost metal sheet.