Resistance spot welding electrode cap
US11890701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2018 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | Feb 1, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A resistance spot welding electrode cap contains a groove at the center of the welding contact interface. During welding, because of the groove, the area of contact between the electrode cap and a metal workpiece to be soldered is reduced. In the initial stage, the overall heat generation is concentrated on the outer ring of the weld point and heat dissipation becomes slower, helping a weld nugget to form from the outside to the inside. Due to the presence of the groove, the metal workpiece expands toward the groove at the center of the electrode, thereby increasing the size of the weld nugget and reducing splash and deformation. In comparison with conventional electrode caps, the welding current required to form weld points of the same size is lower, saving on electricity costs, and weld points obtained using the same current have higher strength and stability with fewer welding defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.