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. 19, 2016
Filed:
May. 01, 2015
Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, JP;
Hideki Okada, Kakamigahara, JP;
Hajime Kashiki, Kobe, JP;
Kazumi Fukuhara, Aakashi, JP;
Mitsuo Fujimoto, Kobe, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe-shi, JP;
Abstract
A tool driving section of a friction stir spot welding device is configured to advance and retract each of a pin member and a shoulder member. A tool driving control section is configured to control the tool driving section such that an absolute value of a tool average position Tx is small, wherein Tx is defined by a following equation: Ap·Pp+As·Ps=Tx, where Ap is a cross-section area of a front end surface of the pin member, As is a cross-section area of a front end surface of the shoulder member, Pp is a press-fit depth of the pin member press-fitted from a front surface of an object to be welded, and Ps is a press-fit depth of the shoulder member press-fitted from the front surface of the object to be welded. Thus, especially in a double-acting friction stir spot welding, excellent welding quality can be accurately achieved according to welding conditions, and an internal cavity defect can be prevented or suppressed.