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:
Mar. 16, 2021
Filed:
Apr. 14, 2016
GM Global Technology Operations Llc, Detroit, MI (US);
David Yang, Shanghai, CN;
Wu Tao, Tianmen, CN;
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A method of laser welding a workpiece stack-up () that includes at least two overlapping aluminum workpieces comprises advancing a laser beam () relative to a plane of a top surface () of the workpiece stack-up () and along a beam travel pattern () that lies within an annular weld area () defined by an inner diameter boundary () and an outer diameter boundary () on the plane of the top surface (). The beam travel pattern () of the laser beam () surrounds a center area encircled by the annular weld area () on the plane of the top surface () so as to force entrained porosity inwards into a region of the weld joint () beneath the center area on the plane of the top surface () of the workpiece stack-up ().