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US 9,283,635 B2Granted
Synchronized hybrid gas metal arc welding with TIG/plasma welding
AssigneeLincoln Global, Inc.
InventorSteven R Peters
Life of this patent
Estimating the term…
Abstract
A system and method is provided in which each of a GMAW power supply and a TIG/plasma power supply are utilized in a common weld joint, where the waveforms from each of the power supplies are pulsed waveform which are pulsed out of phase which each other. Such a system minimizes arc interference and arc blow while at the same time increasing travel speed and throughput of a welding operation.
Claims20
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.
5 more elements
A welding system, comprising:
- a welding power supply which outputs a pulsed welding waveform to melt an electrode into a 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 which outputs a pulsed heating signal to melt at least a portion of 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 pulse welding waveform such that at least a portion of each of said peak current portions of said pulsed heating signal does not occur during said peak current portions of said pulsed welding waveform,
- 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.
3 more elements
A method of welding, comprising:
- providing first and second welding torches, where said first welding torch has a consumable electrode and said second welding torch has a non-consumable electrode;
- providing a pulsed welding waveform to said consumable electrode to melt said consumable electrode into a weld joint and generate a first arc between said consumable electrode and said welding joint, where said pulsed welding waveform has a plurality of peak current portions and a plurality of background current portions;
- providing 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;
- and
- controlling at least one of said pulsed heating signal and 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, detecting a short circuit between said electrode and said weld joint, and wherein upon detection of said short circuit creating a short circuit clearing pulse in said pulsed heating signal having a peak current to clear said short circuit;
- and initiating a short circuit clearing pulse in said pulsed welding waveform upon detection of said short circuit and wherein said peak current of said short circuit clearing pulse of said pulsed heating signal ends prior to an end of said short circuit clearing pulse in said pulsed welding waveform.
5 more elements
A method of welding, comprising:
- providing a pulsed welding waveform to an electrode to melt said electrode into a weld joint, where said pulsed welding waveform has a plurality of peak current portions and a plurality of background current portions;
- providing a pulsed heating signal to melt at least a portion of said weld joint, where said pulsed heating signal has a plurality of peak current portions;
- controlling at least one of said pulsed heating signal and said pulsed welding waveform such that at least a portion of each of said peak current portions of said pulsed heating signal does not occur during said peak current portions of said pulsed welding waveform;
- detecting a short circuit between said electrode and said weld joint, and wherein upon detection of said short circuit creating a short circuit clearing pulse in said pulsed heating signal having a peak current to clear said short circuit;
- and
- initiating a short circuit clearing pulse in said pulsed welding waveform upon detection of said short circuit and wherein said peak current of said short circuit clearing pulse of said pulsed heating signal ends prior to an end of said short circuit clearing pulse in said pulsed welding waveform.
3 more elements
Dependencies are inferred from the claim text.