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. 16, 2010
Filed:
May. 11, 2009
Kinya Aota, Hitachi, JP;
Masahisa Inagaki, Hitachi, JP;
Satoshi Hirano, Hitachi, JP;
Kazutaka Okamoto, Novi, MI (US);
Kinya Aota, Hitachi, JP;
Masahisa Inagaki, Hitachi, JP;
Satoshi Hirano, Hitachi, JP;
Kazutaka Okamoto, Novi, MI (US);
Hitachi, Ltd., Tokyo, JP;
Abstract
A friction stirring-welding method capable of increasing the welding strength of a lap joint. A welding tool () comprises a small diameter projected part () at the tip of a shoulder (). The welding tool is press-fitted to the upper plate () of the lap joint while being rotated. By a friction stirring action, an upper plate side welding boundary surface () plastically flows, a surface oxidation film on a lapped surface is peeled off, and the boundary surface is activated to provide an excellent welding part. Also, since the welding tool is formed in a shape having the small diameter semispherical projected part () at the tip thereof, the thickness () of an upper plate welding part is increased, and a lap joint part with high welding strength can be provided.