System and method for welding with multiple arcs
AssigneeLincoln Global, Inc.
InventorsGeorge D. Blankenship, Elliott K. Stava
Life of this patent
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Abstract
A system and method for welding with a first and second arc between a first and second electrode, respectively, and a common workpiece, where each of the electrodes is driven by a single power source, where there is a first inductor connected in series with the first electrode and a second inductor connected in series with the second electrode and each of the inductors has sufficient inductive reactance to store enough energy to maintain an existing arc associated with one of the electrodes for a selected general time with essentially no current to the one electrode.
Claims86
A system for welding with a first and second arc between a first and second electrode, respectively, and a common workpiece, where each of said electrodes is driven by a single power source, said system comprising:
- a first inductor connected between said power source and said first electrode and a second inductor connected between said power source and said second electrode, where each of said inductors has sufficient inductive reactance to store enough energy to maintain an existing arc associated with one of said electrodes for a selected general time with essentially no current to said one electrode, said inductors being wound on a common core.
A system for welding with a first and second arc between a first and second electrode, respectively, and a common workpiece, where each of said electrodes is driven by a power lead from a single power source, said system comprising:
- an inductor with a core, a center tap, a first end, a second end, a first coil section between said tap and said first end, and a second section between said tap and said second end, said power lead being connected to said tap, a first circuit connecting said first arc in series with said first coil and a second circuit connecting said second arc in series with said second coil.
A system for welding with a first arc and a second arc between a first and second electrode, respectively, and a common workpiece, where said arcs are caused by current flow from a single power source, said system comprising:
- a first current sustaining inductor connected between said power source and said first electrode and a second current sustaining inductor connected between said power source and said second electrode whereby a short circuit of said first arc will not extinguish said second arc for at least a time greater than 1.0 ms said inductors being wound on a common core.
A method for arc welding with at least two separate electrodes forming arcs with a given workpiece, said method comprising:
- (a) moving said electrodes in unison relative to said workpiece in a welding path;
- (b) applying current to said electrodes from a single power source;
- and,
- (c) inserting an inductor between said power source and each of said electrodes to maintain an arc for a given time when reduced current is applied from said source to any one of said electrodes, said inductors being wound on a common core.
Dependencies are inferred from the claim text.