Method and apparatus for GMAW welding
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United States of America Patent
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Oct 13, 1992
Grant Date -
N/A
app pub date -
Aug 2, 1991
filing date -
Aug 2, 1991
priority date (Note) -
Expired
status (Latency Note)
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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.
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