Title:
LASER SPOT WELDING OF OVERLAPPING ALUMINUM WORKPIECES
Document Type and Number:
WIPO Patent Application WO/2017/075808
Kind Code:
A1
Abstract:
A method of laser welding a workpiece stack-up (10) that includes at least two overlapping aluminum workpieces (12, 14) comprises advancing a laser beam (24) relative to a plane of a top surface (20) of the workpiece stack-up (10) and along a spot weld travel pattern (74) that includes one or more nonlinear inner weld paths and an outer peripheral weld path that surrounds the one or more nonlinear inner weld paths. Such advancement of the laser beam (24) along the spot weld travel pattern (74) translates a keyhole (78) and a surrounding molten aluminum weld pool (76) along a corresponding route relative to the top surface (20) of the workpiece stack-up (10). Advancing the laser beam (24) along the spot weld travel pattern (74) forms a weld joint (72), which includes resolidified composite aluminum workpiece material derived from each of the aluminum workpieces (12, 14) penetrated by the surrounding molten aluminum weld pool (76), that fusion welds the aluminum workpieces (12, 14) together.
Inventors:
YANG DAVID S (CN)
TAO WU (CN)
ZHANG JING (CN)
WOLSKER JUSTIN A (US)
TAO WU (CN)
ZHANG JING (CN)
WOLSKER JUSTIN A (US)
Application Number:
PCT/CN2015/094003
Publication Date:
May 11, 2017
Filing Date:
November 06, 2015
Export Citation:
Assignee:
GM GLOBAL TECH OPERATIONS LLC (US)
YANG DAVID S (CN)
YANG DAVID S (CN)
International Classes:
B23K26/22; B23K26/32
Foreign References:
| EP0327320A1 | 1989-08-09 | |||
| CN103100795A | 2013-05-15 | |||
| CN103480966A | 2014-01-01 | |||
| CN102091871A | 2011-06-15 | |||
| CN102126084A | 2011-07-20 | |||
| JPH06126476A | 1994-05-10 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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