How much influence does the choice of laser cutting nozzle diameter have on the cutting quality?

How much influence does the choice of laser cutting nozzle diameter have on the cutting quality?

       A good laser equipment is not only good for lasers and galvanometers. Many other small accessories are also related to the quality of processed products. The nozzle in the laser cutting machine looks like a small thing, but it has an impact on the quality of cutting. It is very huge. When the center of the nozzle and the center of the laser are not on the same axis, the impact on the cutting quality is as follows:

1. When the cutting gas is sprayed out, it will produce uneven gas volume, which will cause melting stains on the cutting surface. It is good for plates below 3mm, and the other side of the cutting will not have much impact, but the impact on plates above 3mm will be very important. Large, it will cause the sheet to be unable to cut through.

2. When cutting workpieces with sharp or small angles, local overmelting will occur, and thick plates will not be able to be cut.

3. In addition, the stability is poor during perforation, and the fluctuation range during use is also large. If the plate is thick enough, the material will have overmelting, and the thin plate is relatively good.

Also, when choosing a laser nozzle, the aperture must be selected correctly, otherwise the cut products will vary greatly, and the desired effect will not be achieved. There are several types of nozzle aperture: φ1.0mm, φ1.5mm, φ2.0mm, φ2.5mm, φ3.0mm, etc. At present, the commonly used ones on the market are φ1.5mm and φ2.0mm, so what is the difference between these two?

1. Use a φ1.5mm nozzle for cutting plates below 3mm, so that the cut product will be thinner. If a φ2.0mm cutting nozzle is used, the cutting surface will be rougher, and there will be stains at the corners.

2. If a nozzle of φ1.5mm is used for cutting the plate of more than 3mm, the gas diffusion area is small, so it is not stable when used, but it can also be used. If φ2.0mm is used, the gas diffusion area is large and the gas flow speed will be slower, so the stability during cutting will be higher.

3. Nozzles of φ2.5mm and φ3.0mm are generally used when cutting plates above 10mm. From the above points, it can be seen that the size of the nozzle has a serious impact on the quality of cutting and perforation. At present, laser cutting nozzles with two apertures of φ1.5mm and φ2mm are commonly used in the market.

      Note: When the nozzle is deformed or there are melting stains on the nozzle, its impact on the cutting quality is the same as described above. Therefore, the nozzle should be placed carefully and not bumped to avoid deformation; the melting stains on the nozzle should be cleaned up in time . The quality of the nozzle has higher precision requirements during manufacturing, and the correct method is required during installation. If various conditions need to be changed during cutting due to the poor quality of the nozzle, the nozzle should be replaced in time.

      Therefore, when choosing the nozzle diameter, you must choose according to your own product. The larger the aperture of the laser cutting nozzle, the worse the protection of the focusing lens, because a lot of debris will be splashed during the cutting process, which will bounce upward. It will have a great impact on the service life of the lens. Another factor that can cause unqualified cutting quality is the misalignment between the center of the nozzle and the laser. This is especially obvious when cutting thick plates. Therefore, if you want to get a good cutting effect, you must adjust the center of the nozzle and the laser. Concentricity to obtain a better cutting section.