An Overview About MIG Welding Process and Services

11 June 2020

Metal Inert Gas (MIG) welding is a type of gas metal arc welding (GMAW) process that utilises a continuous solid wire electrode which is heated and fed into the weld pool from a welding gun. The two base materials are melted together which causes them to join. The welding gun also feeds an inert shielding gas alongside the wire electrode, which helps protect the process from airborne contaminants. Know more about MIG welding process and services by reading on below.

MIG Welding Origins

Initially, MIG welding was patented in the US for its use in welding aluminium in 1949. They formed the arc and weld pool using a bare wire electrode coated with helium gas. It was around 1952 when it became popular with the use of Argon as the shielding gas and for Carbon steels using Carbon Dioxide (CO2). CO2 and Argon-CO2 mixtures are known as metal active gas (MAG) processes. The MIG welding process became the alternative for MMA with its high deposition and productivity.

MIG Welding Process Characteristics

The MIG welding process is a versatile technique suitable for both thin sheet and thick section components. An arc is struck between the end of a wire electrode and the work piece, melting both of them to form a weld pool. The wire serves as both heat source through the arc at the wire tip and filler metal for the welding joint. The wire is fed through a copper contact tube which conducts welding current into the wire. The weld pool is protected from the surrounding atmosphere by a shielding gas fed through a nozzle surrounding the wire.

The protecting gas identification totally relies upon the material being welded and the application. The wire is taken care of from a reel by an engine drive, and the welder moves the welding light along the joint line. Wires might be strong with basic drawn wires, or cored with composites framed from a metal sheath with a powdered motion or metal filling. Consumables are commonly seriously estimated contrasted and those for different procedures. The procedure offers high profitability, as the wire is constantly taken care of.

Manual MIG Welding

Manual MIG welding is frequently alluded as a self-loader process, as the wire feed rate and curve length are constrained by the force source, yet the movement speed and wire position are under manual control. The procedure can likewise be motorized when all the procedure parameters are not straightforwardly constrained by a welder, however may in any case require manual change during welding. At the point when no manual mediation is required during welding, the procedure can be alluded to as programmed.

The procedure as a rule works with the wire decidedly charged and associated with a force source conveying a consistent voltage. Determination of wire width (as a rule somewhere in the range of 0.6 and 1.6mm) and wire feed speed decide the welding current, as the consume off pace of the wire will frame a balance with the feed speed.

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