Apparatus and method of controlling a welding cycle
US5001326A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1990 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Feb 6, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/125
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improvement in a short circuiting arc welding apparatus of the type including a power supply for causing a welding current of different levels to pass through a welding wire extending at variable extension distances from a holder and between the wire and a workpiece at a molten metal pool on the workpiece. This improvement includes control means for maintaining a generally constant wattage in the wire during the plasma boost portion of the arcing condition as the extension distance from the holder changes. Further, the improvement involves controlling the plasma or arcing condition after a plasma boost by a current curve gradually decreasing from the plasma boost portion toward the background current level for the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.