Laser spot welding of overlapping aluminum workpieces
US10946479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2016 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Jan 27, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of laser welding a workpiece stack-up (10) that includes at least two overlapping aluminum workpieces comprises advancing a laser beam (24) relative to a plane of a top surface (20) of the workpiece stack-up (10) and along a beam travel pattern (74) that lies within an annular weld area (82) defined by an inner diameter boundary (86) and an outer diameter boundary (84) on the plane of the top surface (20). The beam travel pattern (74) of the laser beam (24) surrounds a center area encircled by the annular weld area (82) on the plane of the top surface (20) so as to force entrained porosity inwards into a region of the weld joint (72) beneath the center area on the plane of the top surface (20) of the workpiece stack-up (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.