Title:
LASER WELDING OF OVERLAPPING METAL WORKPIECES ASSISTED BY OSCILLATING LASER BEAM FOCAL POSITION
Document Type and Number:
WIPO Patent Application WO/2018/072163
Kind Code:
A1
Abstract:
A method of laser welding a workpiece stack-up (10, 10') that includes at least two overlapping metal workpieces (12, 150, 14) comprises advancing a beam spot (44) of a laser beam (24) relative to a top surface (20) of the workpiece stack-up (10, 10') and along a beam travel pattern (66) to form a laser weld joint (64) that fusion welds the metal workpieces (12, 150, 14) together. While the beam spot (44) is being advanced between a first point (76) and a second point (78) of one or more weld paths (74) of the beam travel pattern (66), the position of a focal point (52) of the laser beam (24) is oscillated relative to the top surface (20) of the workpiece stack-up (10, 10') along a dimension (68) oriented transverse to the top surface (20).
Inventors:
YANG DAVID (CN)
TAO WU (CN)
TAO WU (CN)
Application Number:
PCT/CN2016/102669
Publication Date:
April 26, 2018
Filing Date:
October 20, 2016
Export Citation:
Assignee:
GM GLOBAL TECH OPERATIONS LLC (US)
YANG DAVID (CN)
YANG DAVID (CN)
International Classes:
B23K26/22; B23K26/32
Foreign References:
| EP0327320A1 | 1989-08-09 | |||
| CN102126084A | 2011-07-20 | |||
| CN103100795A | 2013-05-15 | |||
| CN103480966A | 2014-01-01 | |||
| US4642446A | 1987-02-10 | |||
| DE102015001151A1 | 2015-07-02 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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