Patent ID: 9278404
Filing Date: 2016-03-08
CPC Classification: B23K

Claim Text:
1. 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; 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; and a switch that is electrically disposed between ground terminals of the at least one leading power supply and the at least one trailing power supply and at least two ground points on a work piece, wherein said switch is controlled to change direction of a ground current path to the at least one leading power supply and the at least one trailing power supply based at least on a selected ground point from the at least two ground points on the work piece during an open arc welding process; 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.