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:
Jun. 23, 2020
Filed:
Jun. 02, 2015
GM Global Technology Operations Llc, Detroit, MI (US);
David S. Yang, Shanghai, CN;
Justin Allen Wolsker, Shelby Township, MI (US);
Jing Zhang, Shanghai, CN;
Wu Tao, Shanghai, CN;
Dalong Gao, Rochester, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A method of laser welding a workpiece stack-up () that includes at least two overlapping steel workpieces () comprises directing a laser beam () at a top surface () of the workpiece stack-up to form a keyhole () surrounded by a molten steel weld pool (). The laser beam is conveyed along a predefined weld pattern that includes one or more nonlinear inner weld paths () and an enclosed outer peripheral weld path () surrounding the one or more nonlinear inner weld paths. During conveyance of the laser beam along the one or more nonlinear inner weld paths, the keyhole fully penetrates through the workpiece stack-up from the top surface of the stack-up to the bottom surface () of the stack-up. The method produces weld joints between the steel workpieces that do not have an intentionally imposed gap formed between their faying surfaces.