Plasma welding or cutting system provided with a delay

Details Plasma welding or cutting system provided with a delay Plasma welding or cutting system provided with a delay

1986-02-18

1987-09-08

Paschall, M. H.

Electric heating

Metal heating

By arc

219121PM, 219121PU, 219121PW, B23K 900

Patent

active

046925821

ABSTRACT:
The plasma welding or cutting system comprises in particular a torch (2), a nozzle (3), a gas supply for the torch for supplying the torch with a plasma-producing gas, and an electrical supply for the torch for creating, maintaining or breaking an electric plasma welding or cutting arc. According to the invention, the system further comprises a delay system connected, on one hand, to the electrical supply for the torch, and, on the other hand, to the gas supply for the torch, the delay system being, when the torch is supplied by the gas supply and the electrical supply, responsive to the breaking of the electric arc of the torch and causing the closure of the gas supply after a predetermined period of time following the breaking of the electric arc so as to achieve the cooling of the torch and the maintenance of the nozzle against its seat during said period of time.

REFERENCES:
patent: 3242305 (1966-03-01), Kane et al.
patent: 3433927 (1969-03-01), Miller
patent: 4122327 (1978-10-01), Vogts et al.
patent: 4195216 (1980-03-01), Beauchamp et al.
patent: 4580032 (1986-04-01), Carkhuff

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