This video is an introduction to the welding process known as MIG. MIG or (GMAW) is one of the most popular welding processes.MIG welding is an arc welding process that uses a continuous solid wire electrode heated and fed into the weld pool from a welding gun.
The gun feeds a shielding gas alongside the electrode helping protect the weld pool from airborne contaminants.This type of welding uses a shielding gas to protect the molten pool of weld metal from reacting with elements present in the atmosphere. MIG welding requires a DCEP Direct Current Positive Electrode.
The typical GMAW welding gun has a number of key parts—a control switch, a contact tip, a power cable, a gas nozzle, an electrode conduit and liner, and a gas hose. The control switch, or trigger, when pressed by the operator, initiates the wire feed, electric power, and the shielding gas flow, causing an electric arc to be struck.
The gas nozzle directs the shielding gas evenly into the welding zone. Inconsistent flow may not adequately protect the weld area. Larger nozzles provide greater shielding gas flow, which is useful for high current welding operations that develop a larger molten weld pool. A gas hose from the tanks of shielding gas supplies the gas to the nozzle./wikipedia