In a TIG welding process, a high-intensity arc is delivered between tungsten anode (electrode) and the workpiece. In this welding for the most part workpiece is associated with the positive terminal and anode electrode is associated with a negative terminal. This arc produces heat energy which is additionally used to join metal plate by fusion/combination welding. A protecting gas is likewise utilized which shield the weld surface from oxidation.
The principal unit of this welding hardware is a power source. A high current power source required for TIG welding. It utilizes both AC and DC power source. Generally, DC is utilized for hardened steel, Mild Steel, Copper, Titanium, Nickel composite, and so on and AC is utilized for aluminum, aluminum combination and magnesium. The power source comprises a transformer, a rectifier and electronic controls.
It is the most significant part of TIG welding. This torch equipment has three principal parts, tungsten electrodes, collets and nozzle. This torch equipment is either water-cooled or air-cooled. In this torch equipment, the collet is utilized to hold the tungsten terminal. These are accessible in diameter adjustment according to the diameters of tungsten terminal. The nozzle enables the bend and protected gases to stream into the welding zone. The nozzle cross-segment is small which gives high extraordinary arc. There are passes of protected gases at the nozzle. The nozzle of TIG needs to replace periodically due to regular use.
Shielding Gas Supply:
Inert gases like argon are used as shielding gas. The primary reason for protected gas to shield the weld from oxidation. Protected gas does not permit coming oxygen or other air into the welded zone. The choice of inactive gas relies on metal to be welded. There is a framework which directs the progression of shielded gas into the welded zone.
Generally, no filler materials are used for welding thin sheets. But in thick welding, a filler material is used frequently. The filler material is utilized in the type of rods which are directly fed into the weld zone.
Initial, a low voltage high current supply provided by the power source to the welding terminal or tungsten cathode. For the most part, the cathode is associated with the negative terminal of intensity source and workpiece to the positive terminal.
This currently provided structure with a flashed spark between tungsten terminal and workpiece. Tungsten is a nonconsumable electrode, which gives an intense arc. This arc delivered heat which melts the base metals to shape welding joint.
The protected gases like argon, helium is provided through an external or internal valve and controlling valve to the welding torch plate. These gases structure a shield which does not permit any oxygen and other responsive gases into the weld zone. These gases additionally make plasma which expands heat limit of electric arc subsequently builds welding capacity.
For welding thin material no filler metal is required yet for making thick joint some filler material used in the type of poles which is fed manually by the welder into welding zone.