Laser“Wellder” comes From Raycus, ABP laser filler wire welding application process

01 Introduction to laser filler wire welding technology

Laser filler wire welding is a process that pre-fills a specific welding wire into the weld or feeds the welding wire simultaneously during the laser welding process to form a welded joint. The welding process is shown in Figure 1. It is based on traditional laser welding and is equipped with a servo The wire feeding mechanism can realize laser wire filling welding.

02 Characteristics of laser filler wire welding process

Compared with laser autogenous welding, laser filler wire welding has the advantages of lower assembly accuracy requirements, convenient metallurgical adjustment, and lower power to weld thick plate materials [2], as detailed below [3]:

a) Reduce the accuracy requirements for workpiece assembly. In order to avoid laser leakage, the welding gap needs to be controlled within the spot diameter during laser welding, which greatly increases the processing cost. Moreover, the welding gap affects the stability of the welding process and the joint forming quality. By filling the welding wire, not only can the leakage of the laser be reduced, but also the accuracy requirements during workpiece processing and assembly can be reduced.

b) It can facilitate metallurgical adjustment of the weld. The addition of welding wire can replenish the alloy elements burned in the molten pool. By adjusting the composition of the welding wire, for example, adding anti-cracking alloy elements to the welding wire, the weld can be metallurgically adjusted to achieve specific performance of the joint.

c) Lower power laser equipment can be used to weld thick plates. By beveling thick plates and using multiple laser wire filling methods to connect thick plate materials, the heat input is less than that of laser arc hybrid welding, which is beneficial to reducing workpiece deformation.

03 Raycus ABP laser laser filler wire welding

Raycus Laser's RFL-ABP (Adjustable Beam Profile) beam mode adjustable laser is a welding tool independently developed and produced by Raycus, which can effectively suppress spatter during the welding process and significantly improve welding quality and efficiency. Raycus RFL-ABP laser uses a customized optical fiber combiner developed by Raycus, which achieves different modes such as Gaussian/annular/mixed light spots by independently coupling different optical modules into the center core and ring core of the multi-core fiber. refined output.

This application process case uses Raycus Laser's RFL-2000/2000-ABP-C (50μm+150μm) laser with an oscillating welding head to conduct a laser filler wire welding process optimization test for the V-shaped groove joints of profile aluminum Al5083 and cast aluminum AlSi10Mn. . Figure 2 shows the appearance of Raycus Laser's RFL-2000/2000-ABP-C laser.

The quality of the weld seam was tested after welding to meet the technical requirements. The final welding speed was 1.5m/min, the pulling force was ≥300N/mm, and the maximum size of the internal pores was ≤1mm. Figure 4 shows the cross-sectional morphology of the weld seam.

In the new energy industry, the beam mode adjustable continuous fiber laser is used with an oscillating welding head for laser wire filling welding. The welding quality is stable and there is basically no spatter.

04 Conclusion

This article mainly describes the laser filler wire welding process parameters and welding effects of Raycus Laser's ABP laser under corresponding materials and joint methods. To a certain extent, it provides some example references for the selection and design of laser filler wire welding process solutions. In addition, during the laser filler wire welding process, since the welding wire is passively melted after absorbing the laser heat to fill the weld pool, the endothermic melting process of the welding wire, the convection process in the molten pool, and the cooling and solidification process are The quality of welding seam formation is bound to be affected by the relative position of the welding wire and the beam landing point. Therefore, the position of the light wire needs to be observed and confirmed according to the corresponding process specifications before welding.