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. 08, 2008
Filed:
Jun. 09, 2004
Katsuya Nishiguchi, Hiroshima, JP;
Yukihiro Sugimoto, Hiroshima, JP;
Motoyasu Asakawa, Hiroshima, JP;
Tomoyuki Iwashita, Hiroshima, JP;
Kotoyoshi Murakami, Hiroshima, JP;
Toshiyuki Gendou, Hiroshima, JP;
Katsuya Nishiguchi, Hiroshima, JP;
Yukihiro Sugimoto, Hiroshima, JP;
Motoyasu Asakawa, Hiroshima, JP;
Tomoyuki Iwashita, Hiroshima, JP;
Kotoyoshi Murakami, Hiroshima, JP;
Toshiyuki Gendou, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An aluminum plate and a steel plate are lapped. A rotating tool is placed on the aluminum plate, and then a pressing force and a rotational force around a pressing axis of the rotating tool are applied to the aluminum plate and the steel plate. A zinc plating layer having oxidation-prevention function is formed on the surface of the steel plate in advance. When joining the both plates, an oxidation film formed on the aluminum plate is destroyed and the zinc plating layer is pushed out outward from a joining portion, by applying the above pressing force and frictional heat and plastic flow due to the rotation of the rotating tool. Thereby, respective new uncovered surfaces of the both plates are directly contacted.