Method and apparatus for GMAW welding
US5155330A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Aug 2, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/1735
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus of welding along a pass line on a steel workpiece, which method and apparatus comprises simultaneously feeding two welding wires in generally parallel relationship toward a workpiece with extended welding wires generally intersecting the workpiece at individual points spaced from each other a distance in the range about 3/16 inch to about 3/8 inch; then creating a separate arc between each of the wires and the workpiece; passing a single protective envelope of shielding gas axially along two welding wires simultaneously and around said two separate arcs extending between welding wires and the workpiece; and, causing relative movement between the two gas shielded welding wires and the workpiece in the direction corresponding to the desired pass line on the workpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.