Low current water injection nozzle and associated method

Details Low current water injection nozzle and associated method Low current water injection nozzle and associated method

B - Operations, Transporting

23

K

B23K 10/00 (2006.01) H05H 1/34 (2006.01)

Patent

CA 2289432

A water injection plasma arc torch having a nozzle assembly positioned adjacent the discharge end of the electrode of the torch, wherein the torch is capable of operating at a current of 200 amperes or less. The nozzle assembly comprises an inner nozzle mounted adjacent an outer nozzle wherein both inner and outer nozzles have concentric bores for passage of the arc and the plasma gas flow to a workpiece. In addition, the inner nozzle is spaced from the outer nozzle to define a water passage therebetween for directing a flow of water to surround the plasma arc. A gas flow velocity of between about 40 times and about 110 times the water flow velocity provides constriction of the plasma arc, without unduly cooling the plasma arc, and produces good quality straight and bevel cuts in thin section workpieces.

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