Electric heating – Metal heating – By arc
Patent
1988-09-26
1990-02-20
Paschall, M. H.
Electric heating
Metal heating
By arc
21912152, 21912151, 219 75, B23K 900
Patent
active
049028715
ABSTRACT:
In a plasma arc torch, an electrode is movable axially into and out of electrical connection with an anode, typically a nozzle secured to one end of a torch body. A flow of pressurized plasma gas is directed to a plasma chamber between the electrode and the nozzle, preferably through a replaceable swirl ring that closely surrounds and guides the electrode at a larger diameter shoulder portion of the electrode. A gas flow passage, preferably a spiral passage machined on the outer side surface of the shoulder portion, diverts a portion of the gas flow from the plasma chamber to a region above the electrode where it is vented to atmosphere. The passage is sufficiently constricted that a substantial pressure drop appears along the path, while at the same time allowing a sufficient flow to produce the desired cooling. The revolutions of the spiral are preferably closely spaced to enhance the surface area of the electrode in a heat transfer relationship with the cooling gas flow.
REFERENCES:
patent: 2784294 (1957-03-01), Gravert
patent: 2898441 (1959-08-01), Reed et al.
patent: 2923809 (1960-02-01), Clews et al.
patent: 3004189 (1961-10-01), Giannini
patent: 3082314 (1963-03-01), Arata et al.
patent: 3131288 (1964-04-01), Browning
patent: 3242305 (1966-03-01), Kure et al.
patent: 3534388 (1970-10-01), Ito et al.
patent: 3619549 (1971-11-01), Hogan et al.
patent: 3641308 (1972-02-01), Couch, Jr. et al.
patent: 3787247 (1974-01-01), Couch, Jr.
patent: 3833787 (1974-09-01), Couch, Jr.
patent: 4203022 (1980-05-01), Couch, Jr. et al.
patent: 4463245 (1984-07-01), McNeil
patent: 4567346 (1986-01-01), Marhic
patent: 4625094 (1986-11-01), Marhic et al.
patent: 4649257 (1987-03-01), Yakovlevitch et al.
patent: 4701590 (1987-10-01), Hatch
patent: 4748312 (1988-05-01), Hatch et al.
patent: 4777343 (1988-10-01), Goodwin
Silvano Dallavalle et al., Toria Di Saldatura O Talio Al Plasma Con Arco Non Trasferito, Feb., 1986.
Couch, Jr. Richard W.
Sanders Nicholas A.
Hypertherm, Inc.
Paschall M. H.
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