PLASMA ARC TORCH

摘要

A plasma torch comprises a tubular nozzle having an end wall and an electrod e in the nozzle having a nose end facing the end wall. The nose end and end wall provide a p lasma gas chamber, and the end wall has a gas chamber outlet opening extending axially therethr ough. The gas chamber has an entrance radially outwardly of the outlet opening and the end wall ha s a plurality of arcuate ribs thereon circumferentially spaced apart about said outlet opening and pr oviding a plurality of arcuate gas directing channels for radially guiding the flow of plasma gas i n a swirling flow pattern from the entrance to the outlet opening. The nozzle and nozzle mounting comp onents provide an improved arrangement for cooling the torch tip and producing a gas shield ab out the plasma jet.