Laser-TIG (Tungsten Inert Gas) arc rangefinder hybrid welding method and device with addition of high frequency magnetic field

Abstract

The invention relates to a laser-TIG (Tungsten Inert Gas) arc rangefinder hybrid welding method with the addition of a high frequency magnetic field. The method comprises the steps of: 1) first, respectively connecting anode and cathode of a TIG welding machine to a workpiece and a welding gun, and then, connecting an exciting power supply output end to an exciting coil, and clamping the welding gun on a welding gun clamping mechanism of a hybrid welding head to determine a welding travel path; 2) opening an exciting power supply to supply power to the exciting coil; and 3) opening a protective gas to weld and observing formation of weld. Compared with the prior art, the laser-TIG arc rangefinder hybrid welding method with the addition of the high frequency magnetic field provided by the invention has the beneficial effects that as the high frequency magnetic field is added, the pneumatic pressure and the electric current density of arc are effectively improved, so that the arc heat is distributed more centralized and the arc radius is reduced, therefore, the arc energy density and arc deflection are further improved. Improvement of the arc energy density and reduction of radius of an arc column of the arc are very beneficial for enhancing the stable combustion capacity and impacting penetration capacity of the arc during laser-TIG arc rangefinder hybrid welding.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a laser-TIG arc paraxial composite welding method and device with an external high-frequency magnetic field. Background technique [0002] Domestic and foreign studies have shown that the organic combination of laser and arc heat sources can significantly improve welding efficiency and welding quality, and overcome the shortcomings of single heat source welding. However, in the process of high-power laser-arc hybrid welding, the laser generated On the one hand, the photoplasma will shield the laser. On the other hand, due to the existence of the photoisosterism, the anode spot of the welding arc will drift, and the ability of the arc to burn stably will decrease. [0003] Patent document: A laser TIG arc composite welding method and equipment assisted by electromagnetic current coupling field, patent application number: 201010171331.3, in the way of external magnetic ...

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Problems solved by technology

[0002] Domestic and foreign studies have shown that the organic combination of laser and arc heat sources can significantly improve welding efficiency and welding quality, and overcome the shortcomings of single heat source welding. However, in the process of high-power laser-arc hybrid welding, the laser generated Photoplasma, on the one hand, will shield the laser, on the other hand, due to the existence of this photoisosteric, the anode spot of the welding arc will drift, and the ability of the arc to burn stably will decrease

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