公开(公告)号：US10675713B2

公开(公告)日：2020-06-09

申请号：US15659092

申请日：2017-07-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  Wu Tao ,  Paolo A. Novelletto ,  Yu Pan ,  Justin Wolsker

IPC: B23K26/244 ,  B23K26/082 ,  B23K26/322 ,  B23K26/08 ,  B23K101/34 ,  B23K103/16

Abstract: A method of laser welding a workpiece stack-up that includes two or more overlapping metal workpieces is disclosed. The disclosed method includes directing a laser beam at a top surface of the workpiece stack-up to create a molten metal weld pool and, optionally, a keyhole, and further gyrating the laser beam to move a focal point of the laser beam along a helical path having a central helix axis oriented transverse to the top and bottom surfaces of the workpiece stack-up. The gyration of the laser beam may even be practiced to move the focal point of the laser beam along a plurality of helical paths so as to alternately convey the focal point back-and-forth in a first overall axial direction and a second overall axial direction while advancing the laser beam relative to the top surface of the workpiece stack-up along a beam travel pattern.

公开(公告)号：US20190061053A1

公开(公告)日：2019-02-28

申请号：US15685290

申请日：2017-08-24

Applicant: GM Global Technology Operations LLC

Inventor： David Yang ,  Justin Wolsker ,  Blair Carlson ,  Wu Tao

IPC: B23K26/08 ,  B23K26/244 ,  B23K26/10

Abstract: A method of laser brazing a metal workpiece assembly along a joint seam established between a first metal workpiece and a second metal workpiece involves advancing a laser beam along the joint seam while feeding a filler wire into the laser beam to melt a leading end of the filler wire, which is impinged by the laser beam, to produce and dispense molten filler material within and along the joint seam. The dispensed molten filler material solidifies behind the laser beam into a braze joint. Additionally, as part of the method, a position of a focal point of the laser beam relative to the leading end of the filler wire is repeatedly fluctuated during advancement of the laser beam along at least part of the joint seam.

公开(公告)号：US20180043472A1

公开(公告)日：2018-02-15

申请号：US15659092

申请日：2017-07-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  Wu Tao ,  Paolo A. Novelletto ,  Yu Pan ,  Justin Wolsker

IPC: B23K26/244 ,  B23K26/08

Abstract: A method of laser welding a workpiece stack-up that includes two or more overlapping metal workpieces is disclosed. The disclosed method includes directing a laser beam at a top surface of the workpiece stack-up to create a molten metal weld pool and, optionally, a keyhole, and further gyrating the laser beam to move a focal point of the laser beam along a helical path having a central helix axis oriented transverse to the top and bottom surfaces of the workpiece stack-up. The gyration of the laser beam may even be practiced to move the focal point of the laser beam along a plurality of helical paths so as to alternately convey the focal point back-and-forth in a first overall axial direction and a second overall axial direction while advancing the laser beam relative to the top surface of the workpiece stack-up along a beam travel pattern.