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

1977-01-19

1979-03-27

Truhe, J. V.

Electric heating

Metal heating

By arc

219 75, 219137R, B23K 900

Patent

active

041467728

ABSTRACT:
Plasma-MIG welding in which a thermally ionizable inert gas is flowed past a starter non-consumable electrode through a nozzle non-consumable electrode toward a workpiece, firstly a plasma arc is established between such starter non-consumable electrode and such workpiece to initiate and sustain a plasma flow, a consumable electrode is fed through such plasma flow toward the workpiece, secondly a MIG-arc is separately established between such consumable electrode and the workpiece, and finally the nozzle non-consumable electrode is electrically connected to the starter non-consumable electrode so that the plasma arc is taken over by the nozzle non-consumable electrode and extends solely from the nozzle non-consumable electrode to the workpiece.

REFERENCES:
patent: 2847555 (1958-08-01), Yenni
patent: 3246115 (1966-04-01), Johnson
patent: 3575568 (1971-04-01), Tateno
patent: 3818175 (1974-06-01), Essers et al.
patent: 4016397 (1977-04-01), Essers et al.
B. E. Pinfold et al., "Plasma-MIG Welding", Welding & Metal Fabrication, Dec. 1974, pp. 417-419.

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