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Air arc gouging

Gouging operation where an electrode creates an electric arc that melts the workpiece. The melt is continuously pushed away by a directed air jet.

Illustration of Air arc gouging

The process

An electrode [1] of carbon enclosed in a thin layer of copper mounted in the hand-held tool. An electric arc created between the electrode and the workpiece both of which are connected to a power source. The arc creates an intense heat that melts the workpiece and forms a molten pool at the contact point. One of the clamping jaws [2] of the holder has channels that emit high-pressure air jets along the electrode. The air pressure thus continuously removes the molten pool. By moving the tool forward along the workpiece you can thus gouge part of the surface. The electrode is consumed during processing and changed when it has become too short.