Method of and welding torch for arc welding

Details Method of and welding torch for arc welding Method of and welding torch for arc welding

1978-04-13

1980-11-18

Reynolds, B. A.

Electric heating

Metal heating

By arc

219 7616, 219 75, 219137R, B23K 916

Patent

active

042347785

ABSTRACT:
Plasma-MIG welding in which a thermally ionizable gas stream is flowed through a nozzle non-consumable electrode having a central orifice and a surrounding annular opening toward a workpiece and is thereby split into a central gas column enveloped by an annular gas shield. A consumable electrode is fed through the central gas column toward the workpiece, with the establishment of a MIG-arc therebetween. A plasma arc is then spontaneously established by means of the MIG-arc between the nozzle non-consumable electrode and the workpiece. The central plasma gas column is accelerated by constriction of the annular gas shield downstream of the nozzle non-consumable electrode.

REFERENCES:
patent: 3242305 (1966-03-01), Kare et al.
patent: 3366772 (1968-01-01), Wickham et al.
patent: 3832513 (1974-08-01), Klasson
patent: 4101751 (1978-07-01), Urbanic et al.

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