CO2 gas shielded welding gun

Abstract

The invention relates to a CO2 gas shielded welding gun. The gas shielded welding gun comprises a welding gun body, an outer sleeve, a braided wire cable assembly, a gas conveying pipe, a wire feed assembly, a trigger, a controller and a welding nozzle assembly, wherein the braided wire cable assembly, the gas conveying pipe, and the wire feed assembly are sequentially spaced in the outer sleeve along a ring direction; the welding nozzle assembly comprises a distance sensor, a conductive nozzle, a telescopic pole and a first motor; the telescopic pole is in transmission connection with the motor, and the controller is in control connection with the first motor and sends out forward rotation or reverse rotation signals to the first motor; the wire feed assembly comprise a wire feed spring, a solder wire reeling slot and a second motor; solder wires are arranged on the solder wire reeling slot; the solder wire reeling slot is in transmission connection with the second motor; the trigger is connected with the controller and inputs forward rotation or reverse rotation signals of the second motor to the controller. The welding gun has the advantages that the service life of the welding gun is prolonged, the potential safety hazard at a solder wire protruding end can be eliminated after the welding operation is completed, and meanwhile the high-quality welding effect can be obtained when a relatively small gap is welded.

Description

technical field [0001] The invention relates to a welding torch device, in particular to a CO 2 Gas shielded welding torch. Background technique [0002] At present, most of the conductive cables in commonly used CO2 gas shielded welding torches are made of rubber insulated cables that are packaged at one time with insulating sheaths, braided cables, and gas pipes. Due to the limitations of the technology and other factors, the above-mentioned cables generally have defects such as wall thickness and hard hardening of the insulating outer casing. Since the above-mentioned cables carry a large current (usually up to about 300A) during operation, the temperature of the wire will increase due to the effect of the resistivity of the wire, and the resistivity will also increase with the increase of the temperature of the wire, that is It affects the conduction of the current, and further aggravates the temperature rise of the cable, causing the cable to generate higher heat. Be...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the conductive cables in commonly used CO2 gas shielded welding torches are made of rubber insulated cables that are packaged at one time with insulating sheaths, braided cables, and gas pipes. The required working current is conducted. Due to the limitations of the process and other factors, the above-mentioned cables generally have defects such as wall thickness and hard hardening of the insulating outer sleeve.

Since the above-mentioned cables carry a large current (usually up to about 300A) during operation, the temperature of the wire will increase due to the effect of the resistivity of the wire, and the resistivity will also increase with the increase of the temperature of the wire, that is It affects the conduction of the current, and further aggravates the temperature rise of the cable, resulting in higher heat generation in the cable

Because the cable adopts one-time package, and its jacket insulation is thicker, which is not conducive to heat dissipation, the CO2 gas shielded welding torch cannot be used normally, which affects the welding quality and seriously damages the service life of the welding torch

At the same time, due to the long-term operation of the cable at super-normal temperature, the rubber outer sleeve of the cable is aging, cracked, torn, and scrapped, which is a major problem that is difficult to break through in the service life of ordinary welding torches.

In addition, after the operator uses the welding torch to complete the welding operation, the welding end of the welding wire sticks out of the welding torch. This exposed welding wire also has certain potential safety hazards.

[0003] In addition, in the welding process where there is a small groove size for some specific structures, the welding tip of the welding torch in the prior art cannot enter the inside of the groove. In order to achieve a smooth transition at the bottom of the weld during welding, the usual method is to increase the length of the welding wire Welding, due to the attraction of the arc by the side wall of the upper groove, the arc is unstable and the quality of welding is reduced

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