Tungsten electrode argon arc welding gun

Abstract

The invention relates to the technical field of arc welding equipment, and discloses an argon tungsten-arc welding gun which comprises an upper gun body, a middle insulator and a lower gun body, the upper gun body, the middle insulator and the lower gun body are arranged in an upper-middle-lower mode to form the complete welding gun, and a chuck is fixedly installed in the middle of the lower gun body. The liquid cooling cavity is formed in the chuck, water cooling used for cooling the chuck directly acts on the tungsten electrode bar, compared with original indirect action, the tungsten electrode bar can be more effectively prevented from being ablated, meanwhile, the power control device is arranged in the liquid cooling cavity, two different flowing states of water flow during water supply and water cut-off are used as conditions, and the energy consumption is reduced. And once water cooling is stopped, power supply is stopped immediately, and the tungsten electrode bar does not work any more, so that the situation that the tungsten electrode bar is ablated before the welding gun is closed due to the lack of the cold area effect of water cooling during water supply is effectively prevented, the ablation and damage of the welding gun are avoided, and the replacement cost of the welding gun is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of arc welding equipment, in particular to a tungsten argon arc welding torch. Background technique [0002] TIG welding is a welding method that uses inert gas (argon, helium) as the protective gas, pure tungsten or activated tungsten as the non-melting electrode, and ignites the arc for welding. The most important core component is the welding torch. The middle of the welding torch is the tungsten rod. Since the tungsten rod needs to pass a large amount of current, a copper chuck is provided on the outside of the tungsten rod. The chuck has a large amount of cooling water. Due to the heat generated after the cooling tungsten rod is energized, there is a protective gas on one side of the gun body, the protective gas acts on the outside of the chuck, and the cooling water acts on the outside of the gas, which can reduce the ablation of the tungsten rod. [0003] However, in the process of use, because the c...

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Problems solved by technology

[0004] In view of the deficiencies in the use of the existing argon tungsten arc welding torch proposed in the background technology, the present invention provides a argon tungsten arc welding torch, which has the functions of reducing tungsten rod ablation, avoiding damage to the welding torch, and reducing the need for replacing the welding torch. The advantage of low cost solves the problems in the above-mentioned background technology that the welding torch is damaged and the tungsten rod is ablated when the water cooling fails.

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