An arc welding method based on laser high frequency oscillation molten pool

Abstract

The invention discloses an arc welding method based on laser high-frequency oscillation molten pool. The method utilizes an arc heat source to provide the main energy required for welding and forming, and uses high-frequency pulse laser energy to oscillate the molten pool to excite the high-frequency oscillation of the molten pool to make the molten pool oscillate. The fusion process forms a dense and fine-grained fusion structure, which includes the following steps: 1) Adjust the relative position of the arc welding torch and the laser exit head; 2) Set the cooperative working mode of the arc current pulse and the laser pulse; 3) Set the Determine the laser beam action mode; 4) Turn on the laser and arc power supply, emit a laser beam with specific parameters, and at the same time start the arc to make the arc work and the metal wire starts to feed; 5) At the end of the welding process, first shut down the laser beam output, Then extinguish the arc, stop the wire feeding, delay the stop of the shielding gas, and end the whole welding process. It can improve the density of the weld structure, increase the heterogeneous nucleation rate in the molten pool, promote uniform nucleation, and significantly refine the grain growth during the solidification of the molten pool.

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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