What is MIG Welding?

What is MIG welding MIG stands for metal  inert gas welding the American Welding  Society calls this process gas metal arc  welding or gmaw you might also hear it  called wire welding and MIG welding a  thin wire acts as the electrode this  wire is fed from a spool mounted on a  gun or inside the welding machine  through a flexible tube and out of the  nozzle on the welding gun or torch.

The  wire is fed continuously when the  trigger on the welding gun is pulled  when this trigger is pulled it also  switches on the welding current and a  shielding gas an electric arc forms  between this wire electrode and the work  piece and heats both metals above their  melting point.

These metals mix together  or coalesce and solidify to join the  work pieces into a single piece the  metal in these parts to be joined is  called the base metal and the metal that  comes from the melting wire electrode is  called filler metal mig welding always  adds filler metal to the joint because  the wire electrode melts as it's being  used make is called a consumable  electrode..

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