![]() Constant voltage can be used with this process. Normally, conventional welding machines with constant current are used. ![]() The circuit diagram for air carbon arc cutting (CAC) or gouging is shown in figure 10-76. Process Diagram for Air Carbon Arc Cutting – figure 10-75 Air Carbon Arc Cutting Video ![]() The process is widely used for back gouging, preparing joints, and removing defective weld metal. The most common metals cut with the process includes cast irons, copper alloys and stainless steel. The process is more flexible than oxyfuel processes since it does not require oxidation in order to cut. The air blast physically removes metal instead of chemically, which is the approach in oxy-fuel cutting processes. Comparison to Other ProcessesĪir carbon arc cutting and metal removal differ from plasma arc cutting in that they employ an open (unconstricted) arc, which is independent of the gas jet. The air carbon arc process is shown in figure 10-75. Required equipment includes an air compressor, welding power source, carbon electrode and a gouging torch. It strikes the molten metal immediately behind the arc. The air jet is external to the consumable carbon-graphite electrode. The molten metal is removed by a high velocity blast of compressed air. Air carbon arc cutting is an arc cutting process in which metals to be cut are melted by the heat of a carbon arc.
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