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:
Jan. 05, 2016
Filed:
Sep. 15, 2011
Eisaku Hasegawa, Tochigi, JP;
Mitsugu Kaneko, Tochigi, JP;
Takafumi Ikeda, Tochigi, JP;
Haruhiko Kobayashi, Tochigi, JP;
Eisaku Hasegawa, Tochigi, JP;
Mitsugu Kaneko, Tochigi, JP;
Takafumi Ikeda, Tochigi, JP;
Haruhiko Kobayashi, Tochigi, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
It is an object of the present invention to provide a seam welding warpage prevention method and apparatus capable of preventing warpage caused by cooling contraction after welding, in a case where workpieces are different from one another in material and thickness, and thus not uniform in thermal contraction. In the seam welding warpage prevention method for welding a plurality of workpieces Wand Wthat are not uniform in thermal contraction with respect to an energizing direction, the workpieces Wand Ware clamped with a pair of roller electrodesandwhile applying current. The welding is performed in a state where the roller electrodethat abuts on the workpiece Whaving higher thermal contraction is offset in an advancing direction ahead of the roller electrodethat abuts on the workpiece Whaving lower thermal contraction.