Resistance spot welding steel and aluminum workpieces using electrode weld face cover
US10052710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2014 |
| Grant date | Aug 21, 2018 |
| Priority date | — |
| Expiry date | Dec 28, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of resistance spot welding a steel workpiece and an aluminum or aluminum alloy (“aluminum”) workpiece together includes several steps. One step involves providing a workpiece stack-up with a steel workpiece and an aluminum workpiece. Another step involves attaching a cover over a weld face of a welding electrode. The cover is made of a metal material with an electrical resistivity that is greater than an electrical resistivity of a material of the welding electrode. Yet another step involves performing multiple individual resistance spot welds to the workpiece stack-up. The cover abuts the aluminum workpiece while the individual resistance spot welds are performed. And another step involves removing the cover from the welding electrode after the individual spot welds are performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.