Small-bore TIG (tungsten inert gas) surfacing torch

Abstract

The invention relates to a small-bore TIG (tungsten inert gas) surfacing torch comprising a gun body and a gun head. The gun body comprises a water-cooled casing, a pipe assembly and an insulating bushing, wherein the pipe assembly is coaxially arranged inside the water-cooled casing; the insulating bushing is spaced between the water-cooled casing and the pipe assembly; the pipe assembly is mutually insulated from the water-cooled casing through the insulating bushing; the pipe assembly comprises a wire feeding pipe, a protective gas path, a conductor, a water inlet pipe and a water return pipe; the gun head comprises a fixed seat, a tungsten electrode clip, a tungsten electrode and a protective gas guiding assembly; the tungsten electrode clip is arranged on the upper end of the fixed seat; the tungsten electrode is clamped on the tungsten electrode clip; the protective gas guiding assembly is used for importing protective gas into the tungsten electrode and a workpiece welding areaat least; the protective gas guiding assembly is communicated with the protective gas path in a gas mode; the tungsten electrode is electrically connected with the conductor; and an included angle of60 degrees to 90 degrees is formed between the center line of the gun head and the axis line of the gun body. The structure design that the included angle of 60 degrees to 90 degrees is formed between the center line of the gun head and the axis line of the gun body solves the technical difficulty of small-bore TIG surfacing welding with a deep-bore inner wall and can realize effective surfacing welding on the inner wall of a workpiece with an internal diameter not less than 50mm and a length not larger than 1000mm after surfacing welding.

Description

technical field [0001] The invention relates to a small hole TIG surfacing gun. Background technique [0002] At present, whether it is manual welding or automatic welding of 0.5-4.0mm thick stainless steel, TIG welding is the most commonly used; while TIG welding is also used for welding the root bead of thicker sections, and the main weld is surfacing. Referring to the Chinese patent whose application number is 200710147087.5, a kind of TIG welding torch and welding cooling method are disclosed in this patent technology. Fixing seat; the gun body includes an insulating bush coaxially sleeved from the outside to the inside, a cooling tube body, a tungsten pole clamp and a compression adjustment rod connected to the rear end of the tungsten pole clamp, and the outer wall of the gun body It is provided with a circuit pipe, a protective gas inlet, an outer pipe water inlet pipe and a water return pipe. The fixed seat includes a fixed seat body, a front end and a connecting p...

AI Technical Summary

Problems solved by technology

In the process of manufacturing industrial equipment, it is often necessary to surfacing welding the inner wall of a small hole with an inner diameter of tens of millimeters, but the existing TIG welding torches with the above-mentioned structure obviously cannot complete the work, thus affecting the manufacturing of the equipment

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