Electric heating – Metal heating – By arc
Patent
1980-02-08
1982-03-09
Albritton, C. L.
Electric heating
Metal heating
By arc
219121L, 219121LM, 219121LY, B23K 2700
Patent
active
043191207
ABSTRACT:
In order to remove the plasma cushion and loose metal material created by the action of the laser on a metal workpiece, a shielding gas jet is directed from a nozzle across the workpiece surface through the zone of action of the laser beam.
The shielding gas rather than being allowed to go to waste is collected, purified of the metal material contained therein and fed back to the nozzle. This recirculation of the shielding gas is effected in ducting which incorporates in succession between the gas-collecting input end and the nozzle, a diffuser to slow the gas, a cooling chamber, a separator for removing metal particles condensed out of the stream, a pump, a filter and further cooling means.
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Albritton C. L.
Fiat Auto S.p.A
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