MIG welding is a curve welding process in which a persistent strong wire electrode is fed through a welding firearm/gun and into the weld pool, joining the two base materials together. A protecting gas is additionally sent through the welding firearm and shields the weld pool from defilement. Truth be told, MIG represents metal inert gas.
MIG welding is a flexible method reasonable for both thin as well as thick workpiece. An arc is generated between the arrangement of the electrode and the workpiece. Due to this arc, the meatal get soften and forms a molten weld pool. The wire fills in as both warmth source by means of the arc at the wire tip and filler metal for the joint. The wire is encouraged through a copper contact tube (contact tip) which behaviours welding current into the wire. The weld pool is shielded from the atmosphere by a protecting gas nourished through a nozzle. Protecting gas choice depends upon the material being welded and the application. The wire is fed to the weld by an engine drive, and the welder moves the welding light along the joint line. Wires might be strong enough to carry out the weld, or core. Consumables are commonly cost consumable and those for different procedures. The procedure offers high profitability, as the wire is nourished frequently.
Another type of MIG welding is manual MIG Welding frequently referred as a semi-automatic process, as the wire feed rate and arc length are adjusted by the power source, yet the electrode speed and wire position are under manual control. The procedure can likewise be mechanised when all the procedure parameters are not constrained by a welder, yet may even now require manual alteration during welding. At the point when no manual intercession is required during welding, the procedure can be said as automatic/programmed.
The procedure, as a rule, works with the wire charged and associated with a power source conveying a steady voltage. Determination of wire measurement and wire feed speed decide the welding current, as they consume off the rate of the wire will frame a harmony with the feed speed.
Working
- Initially, a high voltage current is changed into DC current supply with a high current at low voltage. This parameter will pass through weld electrode.
- A wire is utilized as an electrode. The electrode is associated with the negative terminal and workpiece from the positive terminal.
- An intense arc will produce among terminal and workpiece because of intensity supply. This arc used to deliver heat which melts the electrode wire and the base metal. For the most part, electrodes are made by the base metal for making a uniform joint.
- This arc is all around protected by protecting gases. These gases secure the weld structure other receptive gases which can harm the quality of welding joint.
- This electrode moves consistently on the welding region for making appropriate weld joint. The angle of travel ought to be kept between 10-15 degree. For filet joints, the angle will be 45 degrees.