Arc welding method based on laser high-frequency oscillation molten pool

Abstract

The invention discloses an arc welding method based on a laser high-frequency oscillation molten pool. The method utilizes an arc heat source to provide main energy required for welding and forming and utilizes high-frequency pulse laser energy to oscillate the molten pool to excite the high-frequency oscillation of the molten pool to form a compact and fine-grained fused tissue structure in the fusing process. The method comprises the following steps that 1), the relative positions of an arc welding gun and a laser emitting head are adjusted; 2), a cooperative working mode of the arc currentpulse and the laser pulse is set; 3), a laser beam action mode is set; 4), a laser and an arc power supply are turned on to emit laser beams with specific parameters, and arc ignition is carried out to start the work of the arc and start wire feeding of a metal wire material at the same time; and 5), at the end of the welding process, the laser beam emission is shut down first, then the arc is extinguished, wire feeding is stopped, stopping of shielding gas is delayed, and the whole welding process is ended. By the adoption of the arc welding method, the density of a weld structure can be increased, the heterogeneous nucleation rate in the molten pool is increased, uniform nucleation is promoted, and the grain growth in the solidification process of the molten pool is remarkably refined.

Description

technical field [0001] The invention relates to hybrid welding technology, in particular to an arc welding method based on laser high-frequency oscillation molten pool. Background technique [0002] With the rapid development of science and technology, welding manufacturing has put forward higher and higher requirements for production efficiency, manufacturing precision and manufacturing quality. At the same time, modern manufacturing technology with high efficiency and low energy consumption has become an important development direction in the manufacturing field. Arc welding technology is a mature welding manufacturing technology and the most widely used welding method in industrial production. Its principle is to use the heat generated by arc discharge (commonly known as arc combustion) to melt the welding wire or electrode and the workpiece and condense Welding process that finally forms the weld seam to obtain a strong joint. [0003] Arc welding technology has the ad...

AI Technical Summary

Problems solved by technology

The action point of the laser beam is the lower part of the weld. The laser beam promotes the escape of bubbles by prolonging the time that the molten pool is in the liquid phase. The laser oscillation frequency is set low, and accordingly the additional effect of the laser beam on the oscillation of the entire molten pool is limited.

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