A kind of tig fuse welding device and welding method of low resistivity material

Abstract

A TIG fuse welding device and welding method for low-resistivity materials, including a first TIG power supply, a first TIG welding torch, a second TIG power supply, a second TIG welding torch and a hot wire power supply, the negative pole and the positive pole of the first TIG power supply are respectively It is electrically connected with the first TIG welding torch and the low resistivity material base metal, the negative pole and the positive pole of the second TIG power supply are respectively electrically connected with the second TIG welding torch and the low resistivity material base metal, and the negative pole and the positive pole of the hot wire power supply are respectively connected with the second TIG power supply. The TIG welding gun is electrically connected with the welding wire, and the end of the welding wire is located between the fuse arc and the second TIG arc, so that the liquid metal formed after the welding wire is melted by the fuse arc flows into the molten pool. The invention can form three arcs on the interface of the welding base metal, which not only realizes the early preheating of the base metal with low resistivity by using a small arc current, but also improves the absorption rate of the base metal to the arc energy forming the molten pool, and the welding stability and welding efficiency.

Description

A kind of TIG fuse welding device and welding method of low resistivity material technical field The present invention relates to TIG welding field, specifically a kind of TIG fuse welding device and welding device of low resistivity material. connection method. Background technique Compared with gas metal arc welding, the welding arc of argon tungsten arc welding is extremely stable, and the argon tungsten arc welding is filled with wire. Very little welding spatter occurs during the process, so high-quality welds can be welded. However, the welding speed is low, and the welding Yield is not high. [0003] The hot wire TIG welding method is to preheat the welding wire in advance, and then send it into the molten pool of the TIG arc to realize welding. target The front resistance hot wire method is used in hot wire TIG welding, but this method has the following disadvantages: although the welding wire has been heated before feeding into the molten pool When it re...

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Problems solved by technology

[0005] In order to solve the problems of large heat input to the base metal, large deformation, and poor mechanical properties of the weld caused by increasing the melting filling rate of the welding wire in the prior art, the invention provides a TIG fusion wire welding device for low resistivity materials and welding method, the device forms three arcs on the interface of the welding base metal through the cooperation of two TIG power sources, two TIG welding torches and a hot wire power source with the base metal and welding wire, which not only realizes the use of small arc currents for low The advance preheating of the resistivity base metal also improves the absorption rate of the base metal to the arc energy forming the molten pool, improves welding stability and welding efficiency, and reduces the incidence of weld defects

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