Patent ID: 9283635
Filing Date: 2016-03-15
CPC Classification: B23K

Claim Text:
1. A welding system, comprising: a first welding torch having a consumable electrode; a second welding torch having a non-consumable electrode; a welding power supply connected to said first welding torch which outputs a pulsed welding waveform to melt said consumable electrode into a weld joint and generate a first arc between said consumable electrode and said weld joint, where said pulsed welding waveform has a plurality of peak current portions and a plurality of background current portions; and a heat generation power supply connected to said second welding torch which outputs a pulsed heating signal to melt at least a portion of said weld joint and generate a second arc between said non-consumable electrode and said weld joint, where said pulsed heating signal has a plurality of peak current portions; wherein at least one of said welding power supply and said heat generation power supply are controlled such that said pulsed heating signal is out-of-phase with said pulsed welding waveform such that no portion of each of said peak current portions of said pulsed heating signal occurs during said peak current portions of said pulsed welding waveform; and wherein at least one of said pulsed welding waveform and said pulsed heating signal is an AC signal, and wherein at least one of said welding power supply and said heat generation power supply detects a short circuit between said electrode and said weld joint, and wherein upon detection of said short circuit said heat generation power supply controls said pulsed heating signal to create a short circuit clearing pulse having a peak current to clear said short circuit, and wherein said peak current of said short circuit clearing pulse ends prior to an end of a short circuit clearing pulse initiated by said welding power supply upon detection of said short circuit.