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:
Nov. 04, 2014
Filed:
Jul. 28, 2008
Pei-chung Wang, Troy, MI (US);
Zongqing Lin, Shanghai, CN;
Xinmin Lai, Shanghai, CN;
Yansong Zhang, Shanghai, CN;
Guanlong Chen, Shanghai, CN;
Pei-Chung Wang, Troy, MI (US);
Zongqing Lin, Shanghai, CN;
Xinmin Lai, Shanghai, CN;
Yansong Zhang, Shanghai, CN;
Guanlong Chen, Shanghai, CN;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method and apparatus inspect a quality of an adhesive material used for joining a pair of work surfaces during a weld-bonding process. A pair of work pieces are at least partially bonded by a layer of the adhesive material, and the dynamic displacement of one or both electrodes is measured through a duration of the resistance welding process to determine relative moisture content of the adhesive. A control action is executed when the dynamic displacement exceeds a stored threshold value. The apparatus includes a welding device having a pair of electrodes for providing a clamping force and an electrical current necessary for forming the welded joint, a sensor for measuring a dynamic displacement of at least one of the pair of electrodes and/or another portion of the welding device during formation of the welded joint. A controller has an algorithm for determining a relative moisture using the dynamic displacement.