High current, low impedance resistance welding device
US6756558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jul 20, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/241
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A resistance welding apparatus characterized by very low output impedance, and providing a substantially constant voltage source to low impedance (e.g., resistances on the order of 1-100 micro-ohms) materials-to-be-joined. The welding apparatus includes one or more primary and secondary winding pairs disposed about a high permeability core with the secondary coil(s) positioned between the primary coil(s) and the core. In a preferred form, the secondary coil(s) are capable of delivering more than 75,000 amperes of welding current. The welding apparatus is lighter, more cost efficient, and more energy efficient than conventional systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.