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US 2013/0200054 A1Published application
Tandem buried arc welding
AssigneeLincoln Global, Inc.
InventorsTimothy O'Donnell, Elmar Schwill
Life of this patent
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Abstract
A system and method is provided in which at least two welding power supplies are coupled to respective weld torches where the power supplies each provide a pulse welding waveform to their respective weld torches such that the welding pulses are out of phase with each other such that the respective welding pulses do not overlap during welding. The system also includes a ground current switch which switches the ground current path during welding to minimize arc interference and arc blow.
Claims22
A welding system, comprising:
- at least one leading power supply electrically coupled to a leading electrode, where said leading power supply provides a first welding waveform to said leading electrode to deposit said leading electrode into a weld joint using an open arc welding process, where said first welding waveform comprises a plurality of pulses having a peak current level;
- and
- at least one trailing power supply electrically coupled to a trailing electrode, where said trailing power supply provides a second welding waveform to said trailing electrode to deposit said trailing electrode into said weld joint using an open arc welding process, where said second welding waveform comprises a plurality of pulses having a peak current level;
- wherein at least one of said first and second welding waveforms is controlled such that said peak current levels of said pulses of said first welding waveform are out of phase with said peak current levels of said pulses of said second welding waveform.
1 more element
A method of welding, comprising:
- providing a first welding waveform to a leading electrode to deposit said leading electrode into a weld joint using an open arc welding process, where said first welding waveform comprises a plurality of pulses having a peak current level;
- providing a second welding waveform to said trailing electrode to deposit said trailing electrode into said weld joint using an open arc welding process, where said second welding waveform comprises a plurality of pulses having a peak current level;
- and
- controlling at least one of said first and second welding waveforms such that said peak current levels of said pulses of said first welding waveform are out of phase with said peak current levels of said pulses of said second welding waveform.
1 more element
Dependencies are inferred from the claim text.