Energy-saving argon tungsten-arc welding assembly with adjustable welding torch

Abstract

An energy-saving argon tungsten-arc welding assembly with adjustable welding torch comprises a welding gun and an electrical control device which is connected with the welding gun, wherein the welding gun comprises a tungsten rod clamping component, a motor reducer (6), a cooling jacket, an electric arc nozzle (57), a nozzle retainer ring and a shielding gas nozzle; the tungsten rod clamping component comprises a tungsten rod (63) and an intermediate rod (84) which drives the tungsten rod (63) to lift and descend; the cooling jacket is used for delivering cool air film and shielding argon flow; and an argon arc welding machine is adopted as a welding source, the motor reducer (6) is taken as a drive source, the tungsten rod (63) is lifted and descended through a limit ring (96), a connecting ring (90), an upper nut and a lower nut (87) and the intermediate rod (84), the electrical control device is used for controlling the rotation direction of the motor reducer (6), furthermore, a top nut contact (21) is controlled to be communicated with an upper piece contact (15) or a lower piece contact (22), so the tungsten rod (63) is freely and continuously adjusted in a stepless manner, and is reset when the arc is quenched.

Description

technical field [0001] The invention relates to a tungsten argon arc welding machine, in particular to an energy-saving argon tungsten arc welding adjustable welding torch assembly capable of providing adjustable current density to the argon tungsten arc welding machine. Background technique [0002] The arc generated by the existing argon tungsten arc welding machine is divergent, like an umbrella, with a wide heat-affected zone, small penetration depth, insufficient stability of the arc, and has the disadvantage of drifting, which is easy to produce processing defects. The operating technique is very demanding. People have developed plasma arc welding technology. The plasma welding machine using plasma arc has the advantages of high energy density, good directivity, good stability, large penetration depth, and highly concentrated heating area. However, the structure of the plasma welding machine is complicated, and the cost is several times more expensive than that of the...

AI Technical Summary

Problems solved by technology

However, the structure of the plasma welding machine is complex, and the cost is several times higher than that of the general argon arc welding machine. For some workpieces with large weld gaps or uneven gaps, plasma arc is not suitable

In many practical situations, the seam of the workpiece to be welded cannot be very uniform, and the single use of ordinary argon arc or plasma arc cannot advantageously solve the above problems and contradictions

Therefore, there is a need for an argon arc welding machine in which the operator can change the arc current density at any time according to the size of the gap between the workpieces during the welding process. Unreasonable, the cooling water circulation is not in place or sufficient, the air film protection is uneven and cannot be adjusted, and there is even no reliable insulation on the outside

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