Method for welding a double layer sheet to a jointing sheet
US6369346B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Dec 6, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/163
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for welding a double layer sheet metal (1, 2) having an intermediate layer (5), in particular, a sheet metal with knobs, with a bonding sheet metal (8) by spot or roll seam welding. Before welding of the bonding sheet metal (8) with the two cover sheet metals (1, 2), spaced apart by the intermediate layer (5) of the double layer sheet metal, is carried out, the area (11) about the welding location (12) is burned free of the intermediate layer (5) by the current which is introduced over a large surface area into the cover sheet metals (1, 2) via the welding electrodes (9, 10) placed thereat and guided via a shunt adjacent to the welding location (12). Only thereafter, the sheet metals are brought into conducting contact with one another by a directed local pressure application, and the welding process is carried out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.