Resistance spot welding of aluminum to aluminum and steel to steel
US9676065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2012 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Mar 25, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for welding a plurality of aluminum to aluminum welds and a plurality of steel to steel welds using the same welder includes providing a resistance spot welder with a pair of weld electrodes having an electrode face radius of curvature in the range between 20 mm and 40 mm. The series of aluminum to aluminum welds is first made, and then, after completing the aluminum to aluminum welds, the series of steel to steel welds are made. After completing the steel to steel welds the weld electrodes are cleaned by an abrasive to remove any buildup or contamination of aluminum on the electrodes. In the event the electrodes have mushroomed, then dressing of the electrodes is provided and then the abrasive cleaning is performed to restore the surface texture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.