Metal Inert Gas Welding
Metal Inert Gas Welding
• Metal Inert Gas (MIG) or Gas Metal Arc Welding (GMAW) is the most popular of the arc welding processes.– It is mainly because it is easy to use and
versatile. – With an Inert Gas, such as Argon:
• MIG welding can be used to weld aluminum.
Welding Circuit
Welder
Wire Spool
Welding Gun
Shielding Gas
Wire Feeder
Work CableWork Piece
Welding Power Source
Work Clamp
Welding Gun
Wire Spool
Shielding Gas
Wire FeederRegulator
How It Works
An arc is struck between a continuously fed filler wire and the work.
The arc is protected from oxidation by a shielding gas over the weld pool.
Advantages
• Welds most metals
• Little or no slag
• Easiest to learn
• Greater speed and efficiency
• Fewer Weld Defects
• Welds in most positions
Disadvantages
• Welding outside can be difficult
• Not ideal for thick material or deep penetrating welds