MIG welding, or Metal Inert Gas welding, is a versatile and efficient technique used to join metals together. It involves using an electric arc between a metal electrode and the workpiece, with a shielding gas protecting the weld from oxidation.
There are two main types of MIG welding machines: inverter welders and transformer welders. The first uses advanced electronics to convert AC power to DC, resulting in a more efficient and portable machine. The second uses a transformer to step down the voltage for welding and is generally heavier and less portable than an inverter welder.
MIG welders consist of several key components, including:
- Welding gun: This handheld tool delivers the electric current and shielding gas to the weld.
- Wire feeder: This device feeds the welding wire into the gun.
- Power source: This unit supplies the electricity for the welding arc.
- Gas cylinder: This container stores the shielding gas.