Title:
METHOD FOR LASER WELDING LIGHT METAL WORKPIECES THAT INCLUDE A SURFACE OXIDE COATING
Document Type and Number:
WIPO Patent Application WO/2018/145222
Kind Code:
A1
Abstract:
A method of laser welding together two or more overlapping light metal workpieces (12, 14, or 12, 150, 14) involves advancing a laser beam (24) relative to the top surface (20) of the workpiece stack-up (10) multiple times along a closed-curve weld path (72). The conductive heat transfer associated with such advancement of the laser beam (24) grows and develops a larger melt puddle (76) that penetrates into the workpiece stack-up (10) and intersects each faying interface (34 or 160, 162) established within the stack-up (10). Upon halting transmission of the laser beam (24) or otherwise removing the laser beam (24) from the closed-curved weld path (72), the melt puddle (76) solidifies into a laser weld joint (66) comprised of resolidified composite workpiece material (78).
Inventors:
TAO WU (CN)
YANG DAVID (CN)
PAN YU (CN)
YANG DAVID (CN)
PAN YU (CN)
Application Number:
PCT/CN2017/000147
Publication Date:
August 16, 2018
Filing Date:
February 09, 2017
Export Citation:
Assignee:
GM GLOBAL TECH OPERATIONS LLC (US)
TAO WU (CN)
TAO WU (CN)
International Classes:
B23K26/28
Domestic Patent References:
| WO2015129231A1 | 2015-09-03 | |||
| WO2016043278A1 | 2016-03-24 | |||
| WO2015159852A1 | 2015-10-22 | |||
| WO2015119159A1 | 2015-08-13 |
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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