Rotary double focus laser-MIG electric arc composite welding head

Abstract

The composite rotary double focus laser-MIG electric arc welding head includes mainly two parts, the rotary double focus laser welding head and the MIG electric arc welding wire feeding welding gun, connected via a connecting plate. It has welding wire feeder fixed on the connecting plate, welding wire feeding hose connected to the feeder, conducting nozzle and goose neck for welding wire to pass through; protecting nozzle in the end of the goose neck; and rotating table with reflecting cavity, regulating frame, reflector, connecting barrel and welding laser head. The present invention combines the rotary double focus laser welding and the MIG electric arc welding, and has greatly raised welding performance and lowered assembling precision requirement for even wide application.

Description

technical field [0001] The invention relates to a rotating dual-focus laser-MIG arc compound welding joint. Background technique [0002] The existing laser-arc recombination mainly includes laser and TIG, Plasma and GMA. Through the interaction between the laser and the arc, the shortcomings of the single method can be overcome, and then a good compound effect can be produced. During combined processing, the plasma generated by the laser is conducive to the stability of the arc and improves the processing efficiency. [0003] At present, the laser focus in the hybrid welding process is fixed. The problems encountered in the process are mainly due to the very thin diameter of the laser beam, the small focus diameter, and the poor bridging ability of the weld seam. The groove assembly gap is required to be less than 0.5mm. The tracking accuracy is high, and at the same time, the thermal efficiency is very low before the molten pool is formed, and the weld bridging ability i...

AI Technical Summary

Problems solved by technology

[0003] At present, the laser focus in the hybrid welding process is fixed. The problems encountered in the process are mainly due to the very thin diameter of the laser beam, the small focus diameter, and the poor bridging ability of the weld seam. The groove assembly gap is required to be less than 0.5mm. High tracking accuracy is required, and at the same time, the thermal efficiency is very low when the molten pool has not been formed, and the weld bridging ability is very poor

At the same time, since the fixed focus has no stirring effect on the arc, the arc between the arc tip of the melting electrode and the workpiece is unstable and prone to defects

The relative position requirements of the arc center of the melting electrode and the laser focus are relatively strict, which is difficult to guarantee in engineering

In laser welding with fixed focus, the laser is very sensitive to adding wire welding, so it is not conducive to the stability of the welding process

Due to the high reflectivity of metals to laser light, the utilization rate of laser light is low, and further improvement of processing efficiency is limited

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