Features of automatic fiber laser cutting
The lasers used for automatic fiber laser cutting and laser scribing are generally Q-switched lasers and C02 lasers. Controlled fracture is the use of the steep temperature distribution generated during laser engraving of sandalwood, which generates local thermal stress in the brittle material, causing the material to break along the small groove. Characteristics Compared with other thermal cutting methods, laser cutting has the general characteristics of fast cutting speed and high quality. Specifically summarized as the following aspects. (1) Good cutting quality Due to the small laser spot, high energy density and fast cutting speed, laser cutting can obtain better cutting quality. ①The laser cutting incision is narrow, the two sides of the incision seam are parallel and perpendicular to the surface, and the dimensional accuracy of the cut parts can reach ±0.05mm. ②The cutting surface is smooth and beautiful, and the surface roughness is only tens of microns. Even laser cutting can be used as the last process without mechanical processing, and the parts can be used directly. ③After the material is laser cut, the width of the heat-affected zone is very small, and the performance of the material near the slit is almost unaffected, and the workpiece deformation is small, the cutting accuracy is high, the geometric shape of the slit is good, and the cross-sectional shape of the slit is relatively regular. Rectangle.
The comparison of automatic fiber laser cutting, laser cutting, oxyacetylene cutting and plasma cutting methods is shown in Table 1. The cutting material is a 6.2mm thick mild steel plate. (2) High cutting efficiency Due to the transmission characteristics of the laser, the laser cutting machine is generally equipped with multiple numerical control worktables, and the entire cutting process can be fully numerically controlled. During operation, only by changing the numerical control program, it can be applied to the cutting of parts of different shapes, which can be used for two-dimensional cutting and three-dimensional cutting. (3) The cutting speed is fast and the laser with a power of 1200W is used to cut 2mm thick low-carbon steel plates. , The cutting speed can reach 600cm/min; compared with oxyacetylene cutting and plasma cutting, there are many types of laser cutting materials, including metal, non-cutting 5mm thick polypropylene resin board, and the cutting speed can be 1200cm/min. The material does not need to be clamped and fixed during laser cutting, which not only saves tooling and fixtures, but also saves auxiliary time for loading and unloading. (4) Non-contact cutting laser cutting has no contact between the torch and the workpiece, and there is no tool wear . To process parts of different shapes, there is no need to change the 'tool