TIG (DC) Inverter Welders
click text or image to select a welding inverter
TIG/MMA - Pulse - 300A@20% - 400V +/-15%
TIG 300P-Pulse Digital Inverter Welder
Water-Cooled
TIG/MMA - Pulse - 300A@20% - 400V +/-15%
TIG Welding Process
What is the TIG Welding Process?
A number of terms are used for the process such as:
TIG Tungsten Inert Gas
GTAW Gas Tungsten Arc Welding
The TIG welding process consists of an electric arc to provide heat created between a non consumable electrode and the work piece to be welded. The molten pool created by this arc is shielded by a gas which is used to exclude the surrounding atmosphere from the weld area.
The most common gases used are inert such as helium or argon as they have no reaction with the weld pool and being transparent provide the welder with good visibility of the arc. Sometimes a reactive gas can be added such as hydrogen which can increase the heat of the arc and speed of welding.
The TIG welding process produces very high temperatures of up to 19000°C. The TIG arc only produces a source of heat and if additional material is required to complete a weld then this is added either manually or automatically in the form of a consumable TIG filler wire.
The TIG welding inverter power source can be either single or three
phase input and have either TIG DC or TIG AC/DC output.
The DC TIG welding inverters are used in the welding of materials such as stainless steel, steel, copper etc whereas an AC welding inverter will be used to weld materials such as aluminium which have are refractory oxide coating.
The welding inverter will generally have an output open circuit voltage of between 60 and 90V. The TIG welder will provide a constant current type output and the current varies little with arc length changes although the longer the TIG arc is, the wider it becomes and is harder to control. The TIG Inverter will normally contain all the process controls, power supply unit, arc starting unit, gas valves and optional controls for additional cooling.
