Electric arc welding
US5643479A · kind A · utility
27Cited by
8References
19Claims
0Family size
Inventors
Key dates
| Filing date | Nov 14, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Nov 14, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/092
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus for the electric arc welding of metal workpieces utilize a current comprised of squared waveform high-amplitude current pulse groups alternated with squared waveform low-amplitude current pulse groups, the current pulse groups being developed or developed and algorithmically varied in response to detected welding arc voltage/current condition changes and with respect to pulse group periods, pulse group peak current amplitudes, pulse group repetition frequencies, and pulse group current rise/fall rates for particular applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.