Over View Of 3 Phase MIG Welders
MIG/MAG welding is one of the most popular welding methods. But how exactly does it work? Everything you need to know about 3 Phase MIG Welders is covered in our blog article, from selecting the correct shielding gases and filler metals to understanding the different arc types.
MIG/MAG Welding: Two Types of Gas-Shielded Arc Welding
MIG/MAG welding, commonly known as gas-shielded metal arc welding (GMAW), is a type of welding that employs a protective gas shield. This also includes all arc welding procedures that use shielding gases to keep the weld pool from coming into touch with the oxygen in the surrounding air.
MIG and MAG welding are two distinct welding methods. MIG welding stands for metal inert gas welding. This method employs inert – that is, non-reactive – shielding gases such as argon, helium, or a combination of the two. Metal active gas welding is abbreviated as MAG welding. Active shielding gases such as carbon dioxide (CO2) or oxygen (O2) are introduced to the carrier gas argon during this operation.
Where is the Method Used?
MIG/MAG welding methods are extremely adaptable and can be employed in a variety of industries, including metalworking, shipbuilding, steel and container construction, and automotive. MIG/MAG techniques can be employed with components of various thicknesses and geometries manufactured from various materials. MIG welding is best suited to nonferrous metals such as aluminum, magnesium, copper, and titanium. Unalloyed, low-alloy, and high-alloy steels are commonly welded by MAG welding.
How MIG/MAG Welding Works?
MIG/MAG welding uses direct current. The arc burns between the workpiece and a consumable wire electrode, which also serves as a source of filler material and is effectively infinite. It is provided on a spool or in a drum, and the driving unit guides it to the contact tip. Because the free wire end is relatively short, a high amperage can be employed despite the tiny wire electrodes.
Depending on the requirements, solid wires or “flux core” wires can also be employed as filler metals. For MIG/MAG welding, solid wires are most commonly utilized. These wires are made by pulling a rolled wire to the specified nominal diameter. The powdery filler is introduced into a U-shaped strip at one of the production stations to create flux core wires. The strip is then folded or welded to seal it. Varied fillings have different effects on the welding process. The shielding gas is emitted by a gas nozzle located around the electrode. It shields the arc and weld pool from contact with ambient oxygen.
Types of Arcs
Arc welding is a fundamental prerequisite for MIG/MAG welding. It is produced by shortening the circuit between the electrode and the workpiece. The polarity of the wire electrode is usually always positive. During the arc phase, the material is dynamically transferred from the consumable electrode to the workpiece. This process, and hence the type of arc, is determined by the voltage and wire speed. The droplet volume grows as the voltage and wire speed increase, and the material transfer becomes short-circuit-free.
Arc forms are grouped into four categories in general, however, the boundaries between these categories are variable. A spray arc or a pulsed arc is typically employed during MIG welding.
