TIG welding gun and welding method

Abstract

The invention relates to a TIG welding gun and a welding method. The TIG welding gun comprises a gun body and a tungsten electrode placed in the gun body. The end, opposite to a workpiece, of the tungsten electrode is an arc starting end. Two through holes are formed in the tungsten electrode in a penetrating mode and communicate at the arc starting end of the tungsten electrode. A wire feeding pipe and a laser transmission pipe are arranged in the two through holes respectively. A traditional solid tungsten electrode is improved to be the two-hole solid tungsten electrode, namely, the two holes are formed in the solid tungsten electrode in a penetrating mode, one of the holes is a laser beam hole coaxial with a tungsten pipe, and the other hole is a side shaft wire feeding hole formed beside the laser beam hole. The coaxality of laser beams are guaranteed, the stability and melting efficiency of electric arcs are improved, contamination of laser head protection glass is reduced, besides, the good preheating effect of side shaft heat wire TIG welding is combined, oxidation of a heating welding wire is avoided, the welding speed is increased, and the welding quality is improved.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to a TIG welding torch and a welding method. Background technique [0002] Existing TIG welding has outstanding process advantages such as stable arc, excellent welding quality, easy control of heat input, adaptability to active non-ferrous metals, stainless steel and various alloys, etc., especially suitable for thin plate and ultra-thin plate material welding, and can be used in various positions It is also an ideal method to realize single-sided welding and double-sided forming. However, TIG welding also has obvious process shortcomings: 1) shallow penetration, low deposition speed, and low productivity; 2) the ability of the tungsten electrode to carry current is poor, and excessive current will cause the tungsten electrode to melt and evaporate, and its particles have It may enter the molten pool and cause slag pollution (tungsten inclusion). In order to improve the efficienc...

AI Technical Summary

Problems solved by technology

However, TIG welding also has obvious process shortcomings: 1) shallow penetration, low deposition speed, and low productivity; 2) the ability of the tungsten electrode to carry current is poor, and excessive current will cause the tungsten electrode to melt and evaporate, and its particles have May enter the molten pool, slag pollution (tungsten inclusion)

In order to improve the welding deposition efficiency, the heating wire is used, which has a significant improvement, but due to the addition of the heating wire device, the equipment cost is significantly increased, which is not conducive to the robot system integration

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