Many people for the principle of laser cutting machine is not very clear, let small make up now to popularize the basic principle of metal laser cutting machine.
Principle of laser cutting
Laser beam focus into a very small spot (its minimum diameter can be less than 0.1mm), so that the spot at a very high power density, the material under the spot is quickly heated to the gasification temperature, evaporation, the formation of holes, track the speed of light and the relative movement of the material, so that the hole continuous, the formation of a very narrow width of the slit.
Laser cutting features
1. Good cutting quality.Because the laser spot is small and the energy density is high, a laser cutting can obtain better cutting quality.Generally, the laser cut slit is 0.1-0.2mm, the width of heat affected zone is small, the geometric shape of the slit is good, and the cross-section of the slit presents a relatively regular rectangle.The cutting surface of laser cutting has no burr, and the surface roughness R can generally reach more than 12.5um. Laser cutting is even used as the last processing process, and the cutting surface can be directly welded without reprocessing, and parts and components can be directly used.
2.Fast cutting speed.Laser cutting is faster.For example, using 2KV laser power, cutting speed of 8mm thick carbon steel is 1.6m/min, cutting speed of 2mm thick stainless steel is 3.5m/min. When hesitation laser cutting, the workpiece heat affected area is small, deformation is very small, do not need to be fixed, can save the clamping fixture, and save the clamping and other auxiliary time.
3.There are many kinds of cutting materials.Compared with oxy-ethane cutting and plasma cutting, there are many kinds of materials, including metal, nonmetal, metal base and nonmetal base composite materials.Different materials show different laser cutting adaptability due to their different thermal and physical properties and different laser absorption rates.
4.Suitable for processing large products.The manufacturing cost of large products is very high, laser processing does not need any mold, and laser processing completely avoid the formation of material punching and cutting edge, can greatly reduce the production cost of enterprises, improve the level of products.
5.clean, safe and pollution-free.The laser cutting process has the advantages of low noise, small vibration and no pollution, which greatly improves the working environment of operators.
6.Not susceptible to electromagnetic interference.Different from electron beam processing, laser processing is insensitive to electromagnetic field interference and does not need vacuum environment.
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