Claims
- 1. A method of arc welding, which comprises flowing a thermally ionizable gas past and within the region of two non-consumable electrodes horizontally spaced from each other and terminating in a horizontal plane establishing a secondary (plasma) arc solely between said two horizontally spaced non-consumable electrodes to initiate and sustain a plasma flow, feeding a consumable electrode between said two horizontally spaced electrodes and through said plasma flow toward a workpiece, and separately and independently establishing a primary (MIG) arc solely between said consumable electrode and the workpiece.
- 2. A method according to claim 1, in which the plasma flow concentrically surrounds the end portion of the consumable electrode.
- 3. Apparatus for arc welding, which comprises a welding torch provided with two non-consumable electrodes horizontally spaced from each other and terminating in a horizontal plane, means for flowing a thermally ionizable gas past and within the region of said two horizontally spaced non-consumable electrodes, a first circuit means including said two horizontally spaced non-consumable electrodes and a first power supply for establishing a secondary (plasma) arc solely between said two horizontally spaced non-consumable electrodes to initiate and sustain a plasma flow, means for feeding a consumable electrode between said two horizontally spaced electrodes and through said plasma flow toward a workpiece, and second circuit means including said consumable electrode, a second power supply, and said workpiece for separately and independently establishing a primary (MIG) arc solely between said consumable electrode and said workpiece.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7304888 |
Apr 1973 |
NLX |
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Parent Case Info
This is a continuation of application Ser. No. 635,988, filed Nov. 28, 1975, now abandoned, which is a continuation of Ser. No. 455,393, filed Mar. 27, 1974, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1901349 |
Jul 1970 |
DEX |
Non-Patent Literature Citations (1)
Entry |
"Plasma Mig Welding", sheet 46 by Essers Welding and Metal Fabrication, 12-1974. |
Continuations (2)
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Number |
Date |
Country |
Parent |
635988 |
Nov 1975 |
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Parent |
455393 |
Mar 1974 |
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