When many people buy a laser cutting machine, the first consideration is how much laser cutting machine can meet their needs, but in fact, when you have a deep understanding of laser cutting, you can give yourself the answer.

Today, the editor will tell you about the principle of laser cutting and the cutting process and thickness.

       01The principle of laser cutting

       The basic principle of laser cutting is: focus the laser on the material, heat the material locally until it exceeds the melting point, and then blow the molten metal away with coaxial high-pressure gas or the generated metal vapor pressure, as the beam moves relatively linearly with the material, Continue the holes to form very narrow slits.

       02 Follow-up system

      In the large-format laser cutting machine, the processing height of different places is slightly different, which causes the surface of the material to deviate from the focal length, so that the focused spot size and power density are different in different places, and the laser cutting quality of different cutting positions is very inconsistent. , can not meet the quality requirements of laser cutting. The cutting head adopts a follow-up system to ensure that the height of the cutting head and the cutting material is consistent, thereby ensuring the cutting effect.

Some knowledge of laser cutting

      03Auxiliary gas

      The auxiliary gas suitable for the material to be cut must be added during the cutting process. In addition to blowing away the slag in the slit, the coaxial gas can also cool the surface of the machined object, reduce the heat affected zone, cool the focusing lens, and prevent smoke and dust from entering the lens holder and contaminating the lens and causing the lens to overheat. The choice of gas pressure and type has a great influence on cutting. Common gases are: air, oxygen, nitrogen.

      04 Cutting process

      The cutting process is related to the following factors: laser mode, laser power, focus position, nozzle height, nozzle diameter, assist gas, assist gas purity, assist gas flow, assist gas pressure, cutting speed, sheet speed, sheet surface quality.

      One thing to realize is that the accuracy of the laser cutting machine is not only related to the equipment itself, but also to external factors. When we use the laser cutting machine, we need to set and adjust the relevant parameters of the equipment according to the specific processing materials, the quality requirements of the user, etc., such as: power, focus position, cutting speed, auxiliary gas, etc., in order to Meet the product accuracy requirements required by users.