Plasma arc torch head

Details Plasma arc torch head Plasma arc torch head

H - Electricity

05

H

H05H 1/38 (2006.01) B23K 10/00 (2006.01) H05H 1/34 (2006.01)

Patent

CA 2311867

A method of centering an electrode in the nozzle of a plasma arc torch head is disclosed. The method involves complementing the external wall of the swirl to the internal taper of the nozzle; complementing the internal wall of the swirl to the external taper of the electrode; fitting the hollow tapered swirl so formed in the hollow nozzle to abut the inner taper of the nozzle; and fitting the electrode in the hollow swirl to abut the inner taper of the swirl to center the electrode within the nozzle. Also disclosed is a head for a plasma arc cutting torch which includes a swirl located between the nozzle and the electrode, through which plasma fuel gas is introduced into the nozzle, characterized in that the plasma fuel gas is introduced directly into the plasma formation zone or plenum beyond the junction between the nozzle body and cone end thereby avoiding change in direction within the conical end of the nozzle before the plasma formation zone.

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