Electric heating – Metal heating – By arc
Patent
1979-07-02
1981-08-04
Rubinson, Gene Z.
Electric heating
Metal heating
By arc
219121PR, 219121PQ, 219121PS, 219 75, B23K 900
Patent
active
042824184
ABSTRACT:
A plasma torch for micro-plasma welding which has a hollow cylindrical torch housing, an electrode supported in the housing and insulated therefrom, a plasma nozzle having a cooling chamber and a plasma channel mounted in the housing adjacent the end of the electrode, an inert gas nozzle arranged concentrically around the plasma nozzle and various lines and connections for supplying plasma gas, inert gas and a welded current as well as lines for applying a cooling agent to the cooling chamber of the plasma nozzle characterized by the plasma channel of the plasma nozzle having a raised annular edge facing the electrode, which has a large diameter and terminates in a point and is provided with its own cooling chamber. This structure enables the welding torch to withstand high continuous loadings during series fabrication, reduces wear, and provides increased heat dissipation. Preferably, the torch is also provided with a diffusion-tight plasma gas supply line which improves the life of the torch.
REFERENCES:
patent: 3390292 (1968-06-01), Perugini
patent: 3450926 (1969-06-01), Kiernan
patent: 3571556 (1971-03-01), Wustner
patent: 3585434 (1971-06-01), Kato
patent: 3690567 (1972-09-01), Bornerman
patent: 3830428 (1974-08-01), Dyos
patent: 4140892 (1979-02-01), Muller
patent: 4146654 (1979-03-01), Guyonnet
Paschall Mark H.
Rubinson Gene Z.
Siemens Aktiengesellschaft
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