Hollow tungsten electrode arc coaxial laser composite wire filling welding method

Abstract

The invention provides a hollow tungsten electrode arc coaxial laser composite wire filling welding method. The problems that in the hollow tungsten electrode arc wire filling welding process, the current density, temperature and plasma flow speed on the hollow tungsten electrode arc center axis are obviously reduced, consequently, the welding wire melting capacity is poor, and the deposition efficiency in the welding process is not high are solved. The method comprises the following steps: grinding or cleaning a to-be-welded workpiece, and fixing the ground or cleaned to-be-welded workpiece; and adjusting the relative position of laser and the hollow tungsten electrode axis, and enabling the laser to penetrate through the center of a hollow tungsten electrode. Paraxial wire feeding is adopted, the welding wire feeding angle and position are adjusted, and the laser directly irradiates the surface of a welding wire after penetrating through the hollow tungsten electrode; hollow tungsten electrode arc parameters and laser parameters are set; and a control switch is turned on, a hollow tungsten electrode arc is generated, and the laser is emitted from the center of the hollow tungsten electrode to an arc area and directly acts on the surface of the welding wire. The hollow tungsten electrode arc coaxial laser composite wire filling welding method is used.

Description

technical field [0001] The invention relates to a hollow tungsten electrode arc coaxial laser composite wire filling welding method. Background technique [0002] As one of the traditional arc welding technologies, tungsten inert gas welding (TIG) has the advantages of good arc stability, high reliability, high-quality welding, and excellent weld seams. , marine engineering and many other fields have a wide range of applications. However, because the carrying current of the tungsten electrode is limited, and the arc is easy to diffuse and not concentrated, the power density of TIG welding is restricted, the deposition speed is small, the welding speed is not high, and the production efficiency is low. With the development of modern manufacturing industry, there is an urgent demand for the automation and mechanization of TIG welding and high-quality and efficient arc welding process. [0003] Hollow tungsten arc means that on the basis of traditional tungsten inert gas shie...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current density, temperature, and plasma flow rate on the central axis of the arc are significantly reduced due to the current tungsten axis being the central hole, which leads to poor melting ability of the heat source welding wire and low welding process deposition efficiency when filling the welding wire. To solve the problem, provide a hollow tungsten arc coaxial laser composite wire filling welding method that combines laser-hollow tungsten arc heating to melt the welding wire by directly acting on the surface of the welding wire after the laser passes through the center hole of the tungsten electrode.

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