Laser tungsten inert gas (TIG) arc coaxial hybrid welding method with additional high frequency magnetic field and device

Abstract

The invention relates to a laser TIG arc coaxial hybrid welding method with an additional high frequency magnetic field and a device. The method includes firstly connecting positive and negative poles of a TIG welding machine to a workpiece and a tungsten electrode respectively, then connecting an exciting power output end to a field coil, connecting the field coil with a laser TIG composite welding head through a composite welding head connecting device, and determining a welding running path; and opening an exciting power supply to supply power for the field coil; opening shielding gas for welding and observing the weld seam formation condition. The method and the device have the advantages that the arc pneumatic pressure and the arc current density are effectively improved, so that the arc heat distribution is concentrated, the arc radius is compressed, the arc energy density and the arc stiffness are further improved, the stability of the welding arc in a laser arc composite welding process is improved, the coaxial composite degree of the laser and the arc during laser TIG arc composite coaxial welding is quite facilitated, and wide markets and application prospects are provided.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a laser TIG arc coaxial composite welding method and device with an external high-frequency magnetic field. Background technique [0002] In laser-TIG arc hybrid welding, because the arc and laser have good coaxiality, there is no relative position problem between the two, and high-level welding requirements such as laser-TIG arc hybrid welding three-dimensional welding can be successfully realized. However, In the process of high-power laser arc coaxial hybrid welding, the photoinduced plasma not only shields the laser and affects the laser utilization rate, but also causes the anode spot drift of the welding arc, which affects the laser-TIG arc coaxial hybrid welding. The coaxiality of the two arcs affects the welding quality. [0003] Patent document: A laser TIG arc composite welding method and equipment assisted by electromagnetic current coupling field, patent ...

AI Technical Summary

Problems solved by technology

[0002] In the laser-TIG arc hybrid welding, because the arc and the laser have good coaxiality, there is no relative position problem between the two, and the high-level welding requirements such as laser-TIG arc hybrid welding three-dimensional welding can be successfully realized. However, , in the process of high-power laser arc coaxial hybrid welding, on the one hand, the photoinduced plasma shields the laser and affects the laser utilization rate, and also causes the anode spot drift of the welding arc, which affects the laser-TIG arc coaxial hybrid welding. The coaxiality of the two arcs affects the welding quality

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