Mig Welding Guide - Unimig VIPER Operating Manual

MIG WELDING GUIDE

MIG (Metal Inert Gas) Welding
Definition of MIG Welding - MIG (metal inert gas) welding also known as GMAW (gas metal arc welding) or MAG (metal active gas welding), is a
semi-automatic or automatic arc welding process in which a continuous and consumable wire electrode and a shielding gas are fed through a welding
gun. A constant voltage, direct current power source is most commonly used with MIG welding. There are four primary methods of metal transfer in
MIG welding, called short circuit (also known as dip transfer) globular transfer, spray transfer and pulsed-spray, each of which has distinct properties
and corresponding advantages and limitations. To perform MIG welding, the basic necessary equipment is a welding gun, a wire feed unit, a welding
power supply, an electrode wire, and a shielding gas supply. Short circuit transfer is the most common used method whereby the wire electrode is fed
continuously down the welding torch through to and exiting the contact tip. The wire touches the work piece and causes a short circuit the wire heats up
and begins to form a molten bead, the bead separates from the end of the wire and forms a droplet that is transferred into the weld pool. This process is
repeated about 100 times per second, making the arc appear constant to the human eye.
MIG Circuit Diagram
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1. 2.
MIG Torch - Work Piece -
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2
3. 4. Wire Feeder - 5. Wire Spool - 6. Gas
Power Source -
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