Tungsten inert gas shielded welding torch capable of compressing electric arc

Abstract

The invention discloses a tungsten inert gas shielded welding torch capable of compressing electric arc, and a water cooling heat dissipation device composed of an electrode handle, an electrode seat,a water inlet pipe, a water outlet pipe, an electrode cap and a sealing gasket. The head part of the electrode handle is a tungsten electrode seat for installing tungsten electrodes, a positioning table is arranged on the middle part of the electrode handle, the tail part of the electrode handle is a heat dissipation cylinder, the tungsten electrodes are in interference fit with the tungsten electrode seat, and the tungsten electrodes and the electrode handle are integrated through hard connection, namely a combined electrode. The electrode handle enables the combined electrode and the electrode seat to be accurately connected through the positioning table and the electrode seat. An air passage is formed between a welding torch shell and the electrode seat, a cooling water cavity is formed between the heat dissipation cylinder and the electrode seat, the water inlet pipe and the water outlet pipe are both connected with the cooling water cavity, the water inlet pipe is arranged in thewater outlet pipe, a plurality of guide holes are formed in the peripheral wall of the heat dissipation cylinder, and an opening of the heat dissipation cylinder is opposite to a nozzle of the waterinlet pipe. The tungsten inert gas shielded welding torch capable of compressing the electric arc has good cooling effect, large welding penetration depth, convenient electrode replacement and no influence on the welding effect after each electrode replacement.

Description

technical field [0001] The invention relates to a welding torch, in particular to a tungsten inert gas shielded welding torch with compressible arc. Background technique [0002] TIG welding is under the protection of inert gas, the arc generated between the tungsten electrode and the workpiece melts the workpiece or welding wire (if filler wire is used) to weld the workpiece together. Since the advent of argon tungsten arc welding, for more than half a century, the most prominent disadvantages are that the arc is in a free combustion state, and the energy density is low, resulting in low welding production efficiency and shallow welding penetration, usually only for 3 -5mm steel plate for welding. Through the analysis of the physical properties of the arc and thermal plasma, it is difficult to achieve high-efficiency welding and deep penetration welding only by increasing the electric power. Moreover, the heat input and heat-affected zone are too large, resulting in large ...

AI Technical Summary

Problems solved by technology

As we all know, the positioning accuracy of ordinary threads is not high, and the threaded connection will cause random deviations between the actual position of the electrode on the welding torch nozzle and the design position

This will result in poor reproducibility of the welding effect due to the different positions of the electrodes each time the electrodes are replaced

Due to the small contact area between the tungsten electrode clamp and the tungsten electrode, the cooling effect is poor, and the welding torch welding penetration is shallow and the effect is poor; when the working current is greater than 180A, there will be a problem of large electrode loss

[0009] In the case where the metal bracket is connected to the tungsten electrode, due to the small diameter of the water inlet pipe or the long distance from the bottom of the electrode, the coolant in the water chamber is laminar, and its cooling effect is not good.

[0010] Due to the high temperature generated by the arc when the welding torch is working, the electrode will be burned

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