Mig Welders and Mig Welding Equipment
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MIG(Metal Inert Gas) Welding is similar in basic principle to arc welding; using a high current to melt a filler metal onto the work – the difference lies in the feed of the filler metal and the method used to combat oxidation. Instead of a filler rod being used to add metal to the work, a continuous wire feed is run through a hand held "gun" from a roll inside the welder.
During the wire feed, inert argon gas is expelled from the nozzle of the gun around the area of the weld, preventing oxidation of the hot metal.
The feed of the gas and wire are controlled by a trigger mechanism on the gun, which when depressed initiates the feed.
The speed of the wire feed and current being put through it can be adjusted and preset on the welder itself. This form of welding is perhaps easier than arc welding, as (if the machine is set up correctly) the user can concentrate on the path of the weld as opposed to the feed of the filler metal, as the welder controls the feed.
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