Water-cooled welding gun for molten gas bath coupling active TIG welding

Abstract

The invention discloses a water-cooled welding gun for molten gas bath coupling active TIG (tungsten inert gas) welding. An inner gas vent is formed at the centre of the upper part of a gun body (4); a cooling water tank (b) is arranged inside the gun body; a gas chamber (f) for inflating outer gas is arranged at the lower part of the gun body; an outer gas inlet (a), a cooling water inlet (e) and a cooling water outlet (c) are formed on the side surface of the gun body; a gun body sealing screw cap (3) for sealing the cooling water tank (b) of the gun body is arranged on the gun body; a tungsten electrode clamp (9) is arranged inside a contact tip (6); an inner nozzle (11) is connected with the lower end of the contact tip (6); the contact tip (6) is connected to the lower part of the gun body (4); the outer nozzle (10) is connected to the outer part of the gun body (4); two gas sifters (7and 8) are sleeved outside the contact tip (6); an outer gas pipe connector (1) is connected to the side surface of the gun body (4); a cooling water pipe connector (2) is installed on the side surface of the gun body (4); and a hydroelectric integrated pipe connector (5) is installed on the side surface of the gun body (4).

Description

technical field [0001] The present invention relates to active welding devices. Background technique [0002] Tungsten argon arc welding, or TIG welding (Tungsten Inert Gas welding), is a welding method widely used in modern industrial manufacturing. It has excellent welding quality, but this method also has obvious limitations, that is, the welding penetration is shallow, The single-pass welding penetration is generally below 3mm, which restricts its application to a certain extent. The proposal of the active welding method represented by A-TIG welding (Activating flux TIG welding) not only fully retains the advantages of argon tungsten arc welding, but also doubles the penetration depth by introducing active elements into the conventional TIG welding process , has aroused widespread attention at home and abroad. In active welding, there are two main mechanisms for the increase of penetration by active elements, namely the arc shrinkage theory and the change theory of the...

AI Technical Summary

Problems solved by technology

Although these three methods can significantly increase the penetration depth, in practical applications, the first method needs to develop different active agents for different base metals, and the active agent is usually applied manually in production, which is both Increased cost reduces production efficiency and process stability

In the second type of method, if the active mixed gas is used to directly protect the molten pool, the content of the active component carbon dioxide or oxygen in the mixed gas needs to be controlled within a very low range of 0.1%-0.3%, which requires high precision gas proportioner, and there is tungsten oxidation, which shortens the life of tungsten

The third type of method requires two arcs, resulting in poor energy saving effect, and may increase equipment investment or lower production efficiency than the second active element introduction method

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