The main functioning of MIG welding is based on passing a metal wire through a welding torch to fuse it via an electric arc.
The continuous wire welding process is widely used for high production levels and can be applied to automated systems.
MIG welding is an autogenous welding process where the arc strikes between the piece and the fusing wire.
The wire advancing device continually feeds the bath (contrary to the electrode rod which, once complete, must be repositioned with a new rod).
Gaseous protection is provided, directly from its fused bath and from a support gas which can be inert, usually argon or helium.
MIG welding (Metal-arc Inert Gas) or MAG (Metal-arc Active Gas) (the only difference between the two is the gas used to protect the welding bath), are both indicated in AWS terminology as GMAW (Gas Metal Arc Welding).
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