Gas Metal Arc Welding (GMAW), or Metal Inert Gas welding, largely known as MIG welding, is a commonly used high deposition rate welding method.
Metal wire is continuously fed from a spool over the pieces of metal being joined as a high frequency electrical current is fed to it. An electric arc is formed when this electric current passes between the metal wire and the metal to be welded. The resultant heat of the arc melts the metal away and forms a molten pool which subsequently cools, fusing the metals together leaving a strong welded join.
MIG welding is beneficial where minimal post weld cleaning is required, when long welds need to be made without starts and stops or where the weld needs to be applied quickly.
Gas Tungsten Arc Welding (GTAW), commonly known as TIG Welding, is a high-quality precision welding process ideal for many applications that require clean, strong weld joints.
In TIG welding a stable arc is formed between a non-consumable tungsten electrode and the piece of metal to be welded. The initial weld is protected from airborne contaminants by an inert gas shield being blown onto the molten weld pool. Filler wire, if used, is added separately to the weld pool.
TIG welding is extremely versatile and can be applied to ferrous or non ferrous metals to produce superior quality welds, with or without the use of filler metal. TIG welding allows the precise control of welding variables, can be applied to thin materials, is free of spatter and yields low distortion.
A type of resistance welding where the spot welds are made at regular intervals on overlapping sheets of metal. An easily automated resistance welding process, Spot welding is ideal for rapid welding applications on thinner materials.
Spot welding is used when welding two or more metal sheets together without using any filler material by applying pressure and heat to the area to be welded. The spot welding process is used for joining sheet materials and uses shaped copper alloy electrodes to apply pressure and convey the electrical current through the workpieces. Heat is developed mainly at the interface between two sheets, eventually causing the material being welded to melt, forming a molten pool, the weld nugget. The molten pool is contained by the pressure applied by the electrode tip and the surrounding solid metal.
Spot welding offers a number of advantages over other techniques, including high speed, ease of automation and energy efficiency with little pollution, plus it allows multiple sheets and dissimilar metals to be simultaneously welded.
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