Method of welding two sides of a joint simultaneously
First Claim
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1. A method of arc welding comprising:
- providing a first current with a first welding waveform to a first electrode;
providing a second current with a second welding waveform to a second electrode;
welding a weld joint in an interface between a first base metal and a second base metal, each of the first and second base metals defining a first side and a second side opposite the first side of the base metal, the interface extending from the first side to the second side of at least one of the first and second base metals with the first electrode disposed on the first side of the at least one base metal and simultaneously welding with the second electrode disposed on the second side of the at least one base metal such that the first and second electrodes are disposed across the interface from each other;
transferring the first current from the first electrode to the second electrode, or transferring the second current from the second electrode to the first electrode; and
moving the first and second electrodes along the weld joint in a same direction and at or near a same speed.
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Abstract
A system for arc welding two sides of a joint simultaneously is disclosed. By customizing welding waveforms and the distance between two or more electrodes, weld currents can be designed to transfer current to and through one or more electrodes in addition to the current traditionally passed only to the common node.
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Citations
37 Claims
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1. A method of arc welding comprising:
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providing a first current with a first welding waveform to a first electrode; providing a second current with a second welding waveform to a second electrode; welding a weld joint in an interface between a first base metal and a second base metal, each of the first and second base metals defining a first side and a second side opposite the first side of the base metal, the interface extending from the first side to the second side of at least one of the first and second base metals with the first electrode disposed on the first side of the at least one base metal and simultaneously welding with the second electrode disposed on the second side of the at least one base metal such that the first and second electrodes are disposed across the interface from each other; transferring the first current from the first electrode to the second electrode, or transferring the second current from the second electrode to the first electrode; and moving the first and second electrodes along the weld joint in a same direction and at or near a same speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 21, 22)
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10. A method, comprising:
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disposing a joint between opposing first and second electrodes, the joint being defined by an interface between a first base metal and a second base metal, each of the first and second base metal defining a first side and a second side opposite the first side of the base metal, the joint extending from the first side to the second side of at least one of the first and second base metals; and arc welding a first side of the joint with the first electrode disposed on the first side of the at least one base metal and simultaneously arc welding an opposing second side of the joint with the second electrode disposed on the second side of the at least one base metal, the first electrode receiving a first current provided by a first power source and a second current provided by a second power source, the second current received at the first electrode via the second electrode. - View Dependent Claims (11, 12, 13, 14, 15, 23)
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16. A method, comprising:
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using simultaneous arc welding processes to dispose a first weld pool on a first side of a joint proximate to a second weld pool disposed on an opposing second side of the joint, the joint being defined by an interface between a first base metal and a second base metal, each of the first and second base metal defining a first side and a second side opposite the first side of the base metal, the first side of the joint being disposed on the first side of at least one of the first and second base metals and the second side of the joint being disposed on the second side of the at least one base metal; providing a first electrical energy from a first power source to the first weld pool via a first electrode; and providing a second electrical energy from a second power source to the first weld pool via the second weld pool. - View Dependent Claims (17, 18, 19, 20, 24)
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25. A method of welding two sides of a joint simultaneously comprising:
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disposing a first electrode and a second electrode about a base metal defining a joint such that said base metal extends between said first and said second electrode with said first electrode being across said joint from said second electrode; simultaneously applying a first welding waveform to said first electrode and applying a second welding waveform to said second electrode; proceeding with said first electrode along a weld path defined by said joint; and proceeding with said second electrode along said weld path, wherein a portion of said first welding waveform is transferred from said first electrode to said second electrode and a portion of said second welding waveform is transferred from said second electrode to said first electrode so as to weld two sides of said joint simultaneously. - View Dependent Claims (26, 27, 28, 29)
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30. A method of arc welding, comprising:
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providing a first welding waveform to a first electrode; providing a second welding waveform to a second electrode; welding a weld joint defined by at least two workpieces, at least one workpiece extending between said first and second electrodes, said welding including welding a first side of said at least one workpiece with said first electrode and simultaneously welding a second side of said at least one workpiece opposite said first side with said second electrode; and moving the first and second electrodes along said weld joint, said first and second electrodes being spaced apart along said joint by up to about 18 inches. - View Dependent Claims (31, 32, 33, 34, 37)
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35. A method of arc welding a weld joint defined by a base metal comprising:
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applying a first AC welding waveform to a first welding electrode; simultaneously applying a second AC welding waveform to a second welding electrode such that a current transfers between said first and second electrode to deposit a material in a weld joint defined by a base material extending between said first and second welding electrodes.
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36. A method of arc welding, comprising:
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providing a first AC welding waveform to a first electrode; providing a second AC welding waveform to a second electrode; welding a weld joint in an interface between a first base metal and a second base metal, each of the first and second base metals defining a first side and a second side opposite the first side of the base metal, the interface extending from the first side to the second side of at least one of the first and second base metals, the interface being disposed between said first and said second electrodes such that the first electrode is disposed on the first side of the at least one base metal and the second electrode is disposed on the second side of the at least one electrode; transferring a current flow over one cycle of said first and said second welding waveforms in a direction being at least one of; (a) from said first electrode to said second electrode; (b) from said second electrode to said first electrode; (c) through said base material to a common node to said first and second electrodes; and moving the first and second electrodes along the weld joint in a same direction and at or near a same speed.
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Specification