Welding gun of high-energy tungsten electrode inert gas welding and process thereof

Abstract

The invention discloses a welding gun of high-energy tungsten electrode inert gas welding. The welding gun comprises an outer insulation pipe, a tungsten electrode base in threaded connection with one end of the outer insulation pipe, and a ceramic nozzle in threaded connection with the tungsten electrode base, wherein a tungsten electrode is arranged in the ceramic nozzle, and is mounted on the tungsten electrode base; the other end of the outer insulation pipe is connected with a joint end; the welding gun further comprises a water cooling system; the water cooling system comprises a water way; one end of the water way is a water inlet end of the joint end, and the other end of the water way is a water outlet end of the joint end; and a sealing valve for controlling a water flow of cooling water is arranged between the water way and the tungsten electrode. According to the invention, the indirect cooling of the tungsten electrode in a traditional welding gun is changed to direct water cooling of the tungsten electrode, and the current density on the section of the tungsten electrode is increased through the change of cooling modes, so that the strong and concentrated electric arc force field and temperature field can be obtained through the self-magnetic shrinkage effect generated by electric arc, and the melting capacity of the electric arc is largely improved finally.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a tungsten inert gas shielded welding torch which generates high-energy-density arcs by improving the cooling mode of welding electrodes, and a new welding process performed by the welding torch. Background technique [0002] Tungsten inert gas shielded welding is a welding method that uses the arc heat between the tungsten electrode and the workpiece to melt the base metal and filler wire under the protection of inert gas. During welding, the shielding gas is continuously ejected from the nozzle of the welding torch and forms a The gas shield is used to isolate the air and prevent harmful effects on the tungsten electrode, molten pool and adjacent heat-affected zone, so as to obtain high-quality welds. [0003] Application No. 201010575078.8 discloses a water-cooled welding gun. The welding gun includes a gun body and a gun head connected to the front end of the gun body. The gun...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantage of low energy density in the prior art when the arc is in a free combustion state, and to provide a tungsten electrode that performs forced water cooling on a large cross-section electrode so that it can generate a strong and concentrated arc force field and temperature field. The gas-shielded welding torch adopts the technical solution: a high-energy tungsten inert gas shielded welding torch, including an outer insulating tube, a tungsten pole seat threaded with one end of the outer insulating tube and a ceramic nozzle threaded with the tungsten pole seat, There is a tungsten pole in the ceramic nozzle, the tungsten pole is installed on the tungsten pole seat, and the other end of the outer insulating tube is connected to the joint end. It is characterized in that: the welding torch also has a cooling water system, and the cooling water system includes a water channel , one end of the water channel is the water inlet end of the joint end, the other end of the water channel is the water outlet end of the joint end, and a sealing valve is provided between the water channel and the tungsten electrode to prevent the leakage of cooling water

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