Abstract
The high-speed camera was used to collect the droplet transfer pattern and arc pattern of the laser-arc hybrid welding process. Using the methods of image processing and mathematical statistics, the effects of different laser and arc power conditions on the welding stability were studied. The results show that the melting width depends on the welding current, the depth of penetration depends on the laser power, the droplet transition pattern, the actual filament spacing and the arc length determine the welding stability of the laser arc hybrid welding.
Highlights
Laser-arc hybrid welding is a new welding mode consisting of a laser heat source and an arc heat source
The laser power does not have a significant effect on the width of the weld as the welding current increases
The laser energy enters the molten pool in the form of heat conduction,and is absorbed and reflected.As the laser power gradually increases, the arc plasma reversibly toughens to absorption, and a keyhole is formed on the surface of the workpiece to form a deep fusion welding mode
Summary
Laser-arc hybrid welding is a new welding mode consisting of a laser heat source and an arc heat source. It combines the advantages of laser welding and arc welding to avoid the disadvantages of both. T. Sibillano et al [4,5] studied the correlation between plasma electron temperature and penetration depth during continuous CO2 laser and pulsed Nd:YAG laser welding. The literature [6-8] studied the droplet transition frequency of laser-MAG/MIG hybrid welding, and pointed out that the large number of metallic plasmas generated by the laser action on the thermal radiation of the droplets promoted the droplet transfer. This article provides reference data and theory for the practical application of laser-arc hybrid welding
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