Tungsten inert gas welding (TIG) welding torch and welding device for manufacturing multi-wire common molten pool electric wire additives, and additive manufacturing method

Abstract

The invention relates to a tungsten inert gas welding (TIG) welding torch and welding device for manufacturing multi-wire common molten pool electric wire additives, and an additive manufacturing method. The TIG welding torch for manufacturing the multi-wire common molten pool electric wire additives comprises a torch body, and a ceramic nozzle is arranged at the front end of the torch body. The TIG welding torch is characterized in that a cavity is formed inside the torch body, a hollow tungsten electrode is inserted in the cavity in a penetrating mode, the front end of the hollow tungsten electrode extends out from the port of the ceramic nozzle, and a shielding gas cavity is formed between the inner wall of the torch body and the hollow tungsten electrode; one or more wire feeding channels are arranged in the hollow tungsten electrode in the axial direction; and the end, away from the ceramic nozzle, of the torch body is provided with an air intake hole communicating with a shielding gas supply, and the shielding gas supply further communicates with the wire feeding channels. Due to the fact that the number of the wire feeding channels is one or more, one or more welding wires participate in the welding operation, the deposition capacity is increased on the basis of high deposition efficiency, and as for additive manufacturing and forming, the machining efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of arc additive manufacturing, in particular to a multi-wire eutectic pool arc additive manufacturing TIG welding torch, a welding device and an additive manufacturing method. Background technique [0002] TIG welding (Tungsten Inert Gas Welding), also known as non-melting inert gas tungsten shielded welding. Due to the protection of argon, it can isolate the oxidation of molten metal by air. Therefore, TIG welding is widely used for welding non-ferrous metals such as aluminum, magnesium and their alloys, stainless steel, high-temperature alloys, titanium and titanium alloys that are easily oxidized, and Refractory active metals (such as molybdenum, niobium, zirconium, etc.), and ordinary materials such as carbon steel and low alloy steel, generally do not use TIG welding except for occasions that require high welding quality. However, due to the limited current-carrying capacity of the electrodes in tradit...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-wire eutectic pool arc additive manufacturing TIG torch and welding device and additive manufacturing method to solve the problem of long residence time, low deposition efficiency and low deposition efficiency of traditional TIG welding in arc additive manufacturing. It is especially suitable for additive manufacturing of active metals such as copper, aluminum and their alloys, especially for problems such as excessive stress and cracking in parts, and is specifically realized by the following technical solutions:

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