As a fundamental fabrication process, welding is used to permanently join two different components together - most commonly those made of either metal or plastic. Welding works by heating the surfaces of the parts to melting point and then fusing them together.
The most commonly used welding techniques include MIG welding, TIG welding, ARC welding and coded welding. MIG (metal inert gas) welding relies on the use of a wire electrode to weld components together. The wire electrode is continuously fed through the torch, along with shield gases to avoid contamination and any resulting defects. From here, they enter the weld pool and join the parts as needed. TIG welding also relies on the use of an electrode, although this is non-consumable and instead heats a filler metal to achieve the weld. ARC welding employs electricity to heat the base material, whilst coded welding refers to the use of - and adherence to - welding codes that address a general or specific configuration.