The working principle of Laser Cutter is to use the focused high power density laser beam to illuminate the workpiece, so that the irradiated material melts, evaporates, burns or reaches the ignition point rapidly, and by using the high-speed airflow with the coaxial beam to remove the molten material, the workpiece will be cut off. Laser cutting belongs to one of the hot cutting methods. Laser cutting compared with other thermal cutting methods, the specific advantages can be summarized as follows:
Good cutting quality: Because laser spot is small, energy density is high, cutting speed is fast, so laser cutting can get better cutting quality. ① Laser cutting incision is narrow, parallel to both sides of the slit and perpendicular to the surface, the size precision of the cutting part can reach ±0.05mm. ② cutting surface clean and beautiful, surface roughness of only dozens of microns, or even laser cutting can be used as the last process, no mechanical processing, parts can be used directly. ③ material after laser cutting, the width of the heat affected area is very small, the performance of the material near the slit is hardly affected, and the workpiece deformation is small, cutting precision is high, the geometry shape of the slit is good, and the cross section of the slit has a more regular rectangular shape.
High cutting efficiency: due to the transmission characteristics of laser, Laser Cutter is generally equipped with many CNC workbench, the entire cutting process can be fully realized numerically controlled. Operation, just change the NC program, can be applied to different shape parts of the cutting, can be two-dimensional cutting, but also to achieve three-dimensional cutting.
Cutting speed: With power of 1200W laser cutting 2mm thick low carbon steel plate, cutting speed can reach 15000px/min; cutting 5mm thick polypropylene resin plate, cutting speed can reach 30000px/min. Materials in laser cutting do not need to be clamped, not only to save the fixture, but also to save the upper and lower material auxiliary time.
Non-contact cutting: laser cutting torch and workpiece without contact, there is no tool wear. The processing of different shape of the parts, do not need to replace the "tool", just change the output parameters of the laser. The laser cutting process has low noise, small vibration and no pollution.
Many kinds of cutting materials: compared with oxy-acetylene cutting and plasma cutting, laser cutting materials are various, including metal, nonmetal, metal base and nonmetal matrix composite, leather, wood and fiber. However, for different materials, due to their thermal physical properties and the absorption rate of laser, different laser cutting adaptability is shown.
Laser Cutter in the process of cutting, auxiliary gas is essential! We often have oxygen and nitrogen, of course, the higher the purity of gas, cutting quality will be better. There are many customers want to save the cost of air cutting, but, the cutting process in the protection of the lens is always water mist, cutting quality is poor, this is why?
First of all, let us popularize the role of auxiliary gases:
1. In order to blow away residual residue, to achieve the cutting effect.
2. The use of gas blowing metal slag while protecting the lens, to avoid slag paste attached to the lens, affecting the quality of cutting.
3. Can effectively achieve cutting surface smooth, no burr without hanging slag effect, belong to fine cutting.
4. Can react with the material, increase cutting speed, such as the use of oxygen can achieve the effect of combustion.