Modified series arc welding and improved control of one sided series arc welding
First Claim
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1. A welding system, comprising:
- a first welding power supply having a first positive output terminal and a first negative output terminal, wherein said first positive output terminal is coupled to a first contact tip and said first negative output terminal is coupled to a workpiece; and
a second welding power supply having a second positive output terminal and a second negative output terminal, wherein said second positive output terminal is coupled to said first contact tip and said second negative output terminal is coupled to a second contact tip;
wherein said second negative output terminal is not coupled to said workpiece,wherein each of said first and second contact tips are oriented to direct a first welding electrode and a second welding electrode, respectively, to a common welding are for welding said workpiece, andwherein said common welding arc is between said first welding electrode and said workpiece and between said first welding electrode and said second welding electrode.
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Abstract
An electric arc welding system for depositing weld metal along a groove between two edges of a metal workpiece where the system contains a first power supply and a second power supply, each providing a welding waveform to respective welding electrodes. The positive output terminals of both power supplies are coupled to the same contact tip and the negative output terminal of one of the power supplies is not coupled to the workpiece.
37 Citations
21 Claims
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1. A welding system, comprising:
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a first welding power supply having a first positive output terminal and a first negative output terminal, wherein said first positive output terminal is coupled to a first contact tip and said first negative output terminal is coupled to a workpiece; and a second welding power supply having a second positive output terminal and a second negative output terminal, wherein said second positive output terminal is coupled to said first contact tip and said second negative output terminal is coupled to a second contact tip; wherein said second negative output terminal is not coupled to said workpiece, wherein each of said first and second contact tips are oriented to direct a first welding electrode and a second welding electrode, respectively, to a common welding are for welding said workpiece, and wherein said common welding arc is between said first welding electrode and said workpiece and between said first welding electrode and said second welding electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of welding, comprising:
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coupling a first positive output of a first power supply to a first contact tip and a first negative output of said first power supply to a workpiece to be welded; coupling a second positive output of a second power supply to said first contact tip and a second negative output of said second power supply to a second contact tip such that said second negative output is not coupled to said workpiece during welding; directing a first welding electrode to said workpiece through said first contact tip; directing a second welding electrode to said workpiece through said second contact tip such that said first and second welding electrodes share a common welding are between said first welding electrode and said workpiece and between said first welding electrode and said second welding electrode; providing a first RMS current from said first power supply to said first welding electrode; and providing a second RMS current from said second power supply to said first welding electrode. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification