How is plasma arc gouging performed?

Plasma arc gouging is a variant of the plasma arc process. The arc is formed between a refractory (usually tungsten) electrode and the workpiece. Intense plasma is achieved by constricting the arc using a fine bore copper nozzle.

What equipment is needed for arc carbon gouging?

Required equipment includes an air compressor, welding power source, carbon electrode and a gouging torch. The air carbon arc process is shown in figure 10-75.

What is a possible use for plasma gouging?

Applications. Plasma gouging was developed as a tool for weld removal and weld preparation. Backgouging was used to remove metal from the reverse side of arc-welded joints to eliminate defects and improve strength.

What equipment and supplies do I need for the plasma arc cutting system?

The Plasma Arc Cutting Machine The basic equipment setup for these plasma cutting machines includes a plasma power source, arc starting console, torch assembly, gas supply, cooling system, and an electrically conductive workpiece.

What do you need to know about plasma arc gouging?

Plasma arc gouging equipment is similar to plasma arc cutting equipment; it includes a power source, a gas supply, torch leads, a torch, and consumables. Special gouging consumables and accessories are available. A plasma torch with gouging parts has a larger nozzle, 0.098 in. for 100-amp gouging

What kind of Torch is used for plasma gouging?

In plasma gouging, the torch is inclined at an angle to the workpiece, and the arc plows out a groove on the metal surface and blows the molten metal off to the side. A more intense cutting arc causes a groove too deep and narrow for most applications, so the defocused arc is used for gouging.

What’s the difference between a cutting arc and a plasma arc?

The plasma gouging arc is less constricted than the cutting arc. The goal of plasma arc gouging is to maximize the volume of metal removal. For this reason the torch parts used in gouging are designed to produce a wider and softer arc.

How does plasma gouging work on molten metal?

A cutting arc is directed downward through the metal to blow the molten metal down and out through the kerf, forcing the two pieces of metal to separate. In plasma gouging, the torch is inclined at an angle to the workpiece, and the arc plows out a groove on the metal surface and blows the molten metal off to the side.