When many people buy laser cutting machines, they first consider how many w laser cutting machines can meet their needs, but in fact, after you have a deep understanding of laser cutting, you can give yourself an answer.
Today, Xiaobian will tell you the principle of laser cutting, cutting technology and thickness.
01 laser cutting principle
The basic principle of laser cutting is to focus the laser on the material, locally heat the material until it exceeds the melting point, and then blow the molten metal away with coaxial high-pressure gas or the generated metal vapor pressure. With the relative linear movement of the light beam and the material, the hole is continuously formed into a very narrow slit.
02 servo system
In the large format laser cutting machine, the processing height in different places is slightly different, which causes the surface of the material to deviate from the focal length. In this way, the size of the concentrated spot in different places is different, and the power density is also different. The laser cutting quality at different cutting positions is very inconsistent, which can not meet the quality requirements of laser cutting. The following system of the cutting head can ensure that the height of the cutting head and the cutting material is consistent, thus ensuring the cutting effect.
03 auxiliary gas
Auxiliary gas suitable for the material to be cut must be added during cutting. In addition to blowing away the slag in the slit, the coaxial gas can also cool the surface of the processed object, reduce the heat affected zone, cool the focusing lens, and prevent dust from entering the lens holder to pollute the lens and cause the lens to overheat. The selection of gas pressure and type has great influence on cutting. Common gases are air, oxygen and nitrogen.
04 cutting process
The cutting process is related to the following factors: laser mode, laser power, focus position, nozzle height, nozzle diameter, auxiliary gas, auxiliary gas purity, auxiliary gas flow, auxiliary gas pressure, cutting speed, plate speed, and plate surface quality.
It should be recognized that the accuracy of the laser cutting machine is not only related to the equipment itself, but also related to external factors. When we use the laser cutting machine, we should set and adjust the relevant parameters of the equipment according to the specific processing materials and the quality requirements of users, such as power, focus position, cutting speed, auxiliary gas, etc., in order to meet the product precision requirements of users.
