Electrical plasma jet torch and electrode therefor

Details Electrical plasma jet torch and electrode therefor Electrical plasma jet torch and electrode therefor

1976-03-15

1978-11-28

Truhe, J. V.

Electric heating

Metal heating

By arc

219 761, 219 7611, 219 75, B23K 900

Patent

active

041277600

ABSTRACT:
An electrical plasma jet torch has front and back electrodes mounted in a torch body and means for maintaining a high current electric arc between the electrodes. The front electrode is the anode and is formed with a passage that provides a nozzle through which high velocity, high temperature plasma is ejected. The anode includes an improved arrangement of concentric rows of coolant passages extending to the front of the anode. A single annulus formed in the anode provides communication with all passages of the outer row. Passages of both rows are arranged in mutually spaced groups to provide space for a number of powder bores which extend substantially radially through the anode. The powder bores are enlarged to receive a sleeve which is readily replaced when eroded by highly abrasive powders. An annular grooved boss of the front of the anode is received in a groove in a cover plate and sealed thereto by means of O-rings to provide a coolant flow reversing annulus at the front end of the anode. A modified three piece anode has a simple and replaceable arc chamber section.

REFERENCES:
patent: 3304402 (1967-02-01), Thorpe
patent: 3313908 (1967-04-01), Unger et al.
patent: 3387110 (1968-06-01), Wendler et al.
patent: 3567898 (1971-03-01), Fein
patent: 3684911 (1972-08-01), Perugini et al.
patent: 3740522 (1973-06-01), Muehlberger
patent: 3823302 (1974-07-01), Muehlberger
patent: 3830428 (1974-08-01), Dyos
patent: 3839618 (1974-10-01), Muehlberger
patent: 3851140 (1974-11-01), Coucher
patent: 3914573 (1975-10-01), Muelhberger

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