Laser cutting is the use of focused high-power density laser to rapidly melt, vaporize, ablate or reach the ignition point of the irradiated material on the workpiece, while using high-speed airflow coaxial with the beam to blow away the molten material, thereby achieving the cutting of the workpiece. Laser cutting is one of the thermal cutting methods Compared with other thermal cutting methods, the specific advantages of laser cutting can be summarized as follows:
Good cutting quality: Due to the small laser spot, high energy density, and fast cutting speed, laser cutting can achieve good cutting quality. ① The laser cutting incision is narrow and fine, with both sides parallel and perpendicular to the surface, and the dimensional accuracy of the cutting part can reach ± 0.05mm. ② The cutting surface is smooth and beautiful, with a surface roughness of only a few tens of microns. Even laser cutting can be used as the last process without the need for mechanical parts.
③ After laser cutting, the width of the heat affected zone of the material is very small, and the properties of the material near the cutting seam are almost unaffected. The workpiece deformation is small, the cutting accuracy is high, the geometric shape of the cutting seam is good, and the cross-sectional shape of the cutting seam presents a relatively regular rectangular shape.
High cutting efficiency: Due to the transmission characteristics of lasers, laser cutting machines are generally equipped with multiple CNC workbenches, and the entire cutting process can be fully CNC controlled. When operating, simply changing the CNC program can be applied to cutting parts of different shapes, allowing for both two-dimensional and three-dimensional cutting.
Fast cutting speed: Using a 1200W laser to cut 2m thick low-carbon steel plates, the cutting speed can reach 15000px/min; Cutting 5mm thick polypropylene resin board with a cutting speed of up to 30000px/min. The material does not need to be clamped and fixed during laser cutting, which can save tooling fixtures and auxiliary time for loading and unloading.
Non contact cutting: During laser cutting, there is no contact between the cutting torch and the workpiece, and there is no tool wear. Processing parts of different shapes does not require changing the "cutting tool", only changing the output parameters of the laser. The laser cutting process has low noise, minimal vibration, and no pollution.
There are many types of cutting materials: Compared with oxyacetylene cutting and plasma cutting, laser cutting has a wide range of materials, including metal, non-metal, metal based and non-metal based composite materials, leather, wood, and fibers. However, for different materials, due to their varying thermal and physical properties as well as their absorption rates towards lasers, they exhibit different laser cutting adaptability.
In summary, from the perspective of market conditions, the laser processing market is steadily growing. Against the backdrop of macroeconomic and industrial demand, laser processing equipment has maintained steady growth in industry scale due to its business needs in the processing market. In the technical field, laser processing has multiple technological advantages compared to traditional machine tool cutting and other thermal processing, which are in line with the requirements of high-precision, low loss, and high efficiency in the processing market