عملیات گوجینگ،Arc Gouging،برشکاری با الکترود گرافیت
Air carbon arc cutting
Air
carbon arc cutting previously known as air arc cutting,is an arc
cutting process where metal is cut and melted by the heat of a carbon
arc. Molten metal is then removed by a blast of air. It employs a
consumable carbon or graphite electrode to melt the material, which is
then blown away by an air jet.
This
process is useful for cutting a variety of materials, but it is most
often used for cutting, and #gouging aluminum, copper, iron, magnesium,
and carbon and stainless steels. Because the metal is blown away by the
air jet, it does not need to be oxidized. This process differs from
plasma cutting operations because in air carbon cutting, an open, or
un-constricted, arc is used, and the arc operates separately from the
air jet.
Air
pressures for the jet usually vary from 60 to 100 psig. The carbon
electrode can be worn away by oxidation from heat buildup. This can be
reduced by coating the carbon electrodes with copper.
The
sharpened carbon electrode is drawn along the metal, an arc forms and
melts the metal. The air jet is then used to blow away molten material.
This can be dangerous as the molten material can be blown substantial
distances. The process is also very noisy.
