Water-cooling TIG welding gun with copper-coated tungsten electrode on basis of cathode compression effect

Abstract

The invention relates to an argon tungsten-arc welding gun and discloses a water-cooling TIG welding gun with a copper-coated tungsten electrode on the basis of cathode compression effect. The water-cooling TIG welding gun comprises a center column with the upper part connected to a tail cover and the lower part connected to an electrode base, the lower part of the electrode base is connected to a porous electrode sleeve provided with an electrode tip internal hole chamber, and a tungsten electrode tip is installed at the lower end of the porous electrode sleeve in an embedded mode; a sleeve is arranged outside the center column, and a gap air channel is formed between the sleeve and the center column; the lower part of the sleeve is connected to a shielding gas hood; the tail cover is provided with a water outlet pipe, a water inlet pipe and an air inlet pipe, and a water return hole, a water inlet hole, a ventilation hole and a gas stilling chamber communicating with the gap air channel are correspondingly formed inside the gun body; a water spray nozzle communicating with the water inlet hole is connected to the bottom of the center column; a cooling water channel and a shielding gas channel are separated by an upper sealing ring and a lower sealing ring. According to the water-cooling TIG welding gun, cooling liquid is directly guided into the tungsten electrode for strongly cooling the tungsten electrode, the area of a cathode zone can be compressed, arc columns can be compressed more strongly, the penetrating power of arcs can be improved, and the welding arcs can have better penetrability.

Description

technical field [0001] The invention relates to a tungsten argon arc welding torch, in particular to a TIG welding torch which improves arc performance based on the cathode compression effect, uses a copper-clad tungsten electrode as an electrode, and directly water-cools the electrode to improve welding efficiency. Background technique [0002] Tungsten argon arc welding (TIG) is a high-quality welding process widely used in industrial production, but due to the use of free arc as a heat source, the penetration depth is shallow, the welding speed is small, and the welding efficiency is very low. There is an urgent need to improve and optimize TIG welding, restrict the arc diameter, increase the arc energy density and arc pressure, thereby significantly increasing the penetration depth, and finally greatly improving the welding efficiency. [0003] In plasma arc welding, the direct cooling of the arc column through the water-cooled copper nozzle is an effective measure to co...

AI Technical Summary

Problems solved by technology

However, the manufacturing cost of the plasma arc welding torch is relatively high; the current carrying capacity of the copper nozzle is limited, and it is easy to form double arcs; and the arc blowing force is too large due to direct compression of the arc column, and the stability of the small hole in the process of welding workpieces with a thickness exceeding 6mm is poor.

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