Plasma-arc cutting method

Details Plasma-arc cutting method Plasma-arc cutting method

1979-09-19

1981-10-13

Envall, Jr., Roy N.

Electric heating

Metal heating

By arc

219137R, 219121PP, 219 75, 219121PR, B23K 916

Patent

active

042950309

ABSTRACT:
A method for cutting by a plasma arc in which the nozzle is directly contacted with the base metal to be cut and is at the same electrical potential, and wherein the electrode is first approached near to the base metal to strike the arc and then withdrawn from it to an appropriate cutting distance, and which permits a thinner cutting line to be made and thinner materials to be cut.

REFERENCES:
patent: 2617913 (1952-11-01), Oestreicher
patent: 2922023 (1960-01-01), Hackman et al.
patent: 3715561 (1973-02-01), Hammarlind
patent: 3832513 (1974-08-01), Klasson
patent: 4019017 (1977-04-01), Sitek et al.

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