Characteristics of laser cutting

Compared with other thermal cutting methods, laser cutting is characterized by fast cutting speed and high quality. It can be summarized as follows.

(1) Good cutting quality

Due to the small laser spot, high energy density and fast cutting speed, laser cutting can obtain better cutting quality.

① The laser cutting incision is thin and narrow, both sides of the cutting seam are parallel and perpendicular to the surface, and the dimensional accuracy of the cutting parts can reach ± 0.05mm.

② The 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 machining, and the parts can be used directly.

③ After the material is cut by laser, the width of the heat affected zone is very small, and the performance of the material near the cutting seam is hardly affected. In addition, the workpiece deformation is small, the cutting precision is high, the geometry of the cutting seam is good, and the cross-section shape of the cutting seam presents a regular rectangle. The comparison of laser cutting, oxyacetylene cutting and plasma cutting methods is shown in Table 1. The cutting material is 6.2mm thick low carbon steel plate.

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(2) High cutting efficiency

Due to the transmission characteristics of laser, the laser cutting machine is generally equipped with multiple NC worktables, and the whole cutting process can be numerically controlled. During operation, only changing the NC program can be applicable to the cutting of parts with different shapes, which can not only carry out two-dimensional cutting, but also realize three-dimensional cutting.

(3) Fast cutting speed

Cutting 2mm thick low carbon steel plate with 1200W laser, and the cutting speed can reach 600cm / min; Cut 5mm thick polypropylene resin board, and the cutting speed can reach 1200cm / min. The material does not need to be clamped and fixed during laser cutting, which can not only save the tooling and fixture, but also save the auxiliary time of loading and unloading.

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