Double-beam laser wire filling welding method and device

Abstract

The invention provides a double-beam laser wire filling welding method and device. The double-beam laser wire filling welding method comprises the following steps that a welding wire is preset at a welding seam; double-beam lasers are distributed on the two sides of the longitudinal center line of the welding seam at equal intervals; the center line of the welding wire and the center line of the double-beam lasers are adjusted to be in the same plane; and according to the light wire centering offset, the position of the welding wire is adjusted in real time, and the welding wire is controlled to be subjected to wire filling welding in the welding direction. Double beams are arranged in parallel to improve the molten droplet transfer behavior, the molten droplet transfer period is shortened, the molten droplet transfer size and the molten droplet oscillation amplitude are reduced, and the purpose of improving the surface quality of the welding seam is achieved; and the stability of a molten pool is improved by improving the flowing mode of the molten pool through the double beams, and the purposes of improving welding seam forming and welding seam internal quality are achieved.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a double-beam laser wire-filling welding method. Background technique [0002] As a laser welding process, laser wire welding has been widely used. [0003] At present, some laser welding in industrial production adopts the method of laser filling wire welding to improve the adaptability of the laser welding gap, reduce the assembly precision requirements, improve the weld composition and structure, thereby improving the process adaptability and weld quality. However, the addition of welding wire will increase the difficulty of process control, resulting in high requirements for wire feeding accuracy and difficult control of fuse stability. In order to obtain a good weld quality, the melting transition behavior of the welding wire must be strictly controlled, and the transition should be made in the form of a liquid bridge as much as possible to ensure better weld formatio...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a double-beam laser wire-filling welding method, which is used to solve the problem of weld failure caused by unstable welding wire melting transition process due to the influence of factors such as laser spot size limitation, wire feeding process fluctuations, and difficulty in completely ensuring assembly accuracy. seam quality problem

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