Method of and device for plasma MIG welding

Details Method of and device for plasma MIG welding Method of and device for plasma MIG welding

1977-10-25

1980-09-02

Reynolds, B. A.

Electric heating

Metal heating

By arc

219 7616, 219 75, 219137R, B23K 916

Patent

active

042208440

ABSTRACT:
A plasma-MIG welding system includes establishing a plasma arc between a primary non-consumable electrode and an auxiliary non-consumable nozzle electrode to provide a plasma flow downstream of the primary non-consumable electrode and out through such nozzle electrode. A consumable electrode is fed through the plasma flow out through the nozzle electrode, a MIG-arc being established between the consumable electrode and a workpiece. A gas stream consisting of an inert gas and an oxidizing gas is flowed past the consumable electrode in a manner to completely envelope the same and into admixture with the plasma flow without coming into contact with the non-consumable electrode. A separate gas stream provides a sheath for the resulting plasma flow after its passage through the nozzle electrode.

REFERENCES:
patent: 2862099 (1958-11-01), Gage
patent: 3612807 (1971-10-01), Liefkens et al.
patent: 3770935 (1973-11-01), Tutero et al.
patent: 3830997 (1974-08-01), Esses et al.
patent: 3969603 (1976-07-01), Boughton
Welding Processes and Power Source-by Pierre Scientif Library-chapter 17-pp. 281-285, Power Publications.
Plasma MIG Welding-by Essers et al., Philips Tech. Rev. 33, 21-24, 1973, #1.

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