Both CNC fiber laser cutting machine and CNC plasma cutting machine have their own consumables, such as nozzles. If we can reasonably select and use these consumables, we can improve the working efficiency of NC cutting machine and reduce cutting cost. Today, we mainly learn about the consumables of CNC optical fiber metal laser cutting machine: nozzle

Relationship between nozzle and cutting quality:

When the nozzle center is different from the laser center axis, the influence on the cutting quality of NC optical fiber metal laser cutting machine:

1) The cutting section is affected. When the cutting gas is ejected, the air volume is uneven, which makes the cutting section more prone to the phenomenon of melting stains on one side and no on the other side. It has little impact on the cutting of thin plates less than 3mm. When cutting plates more than 3mm, its impact is more serious, and sometimes it can not be cut.

2) It affects the quality of sharp corners. When cutting workpieces with sharp corners or small angles, it is easy to produce local over melting. When cutting thick plates, it may not be able to cut.

3) It affects the perforation. It is unstable during perforation and the time is not easy to control. The penetration of thick plate will cause over melting, and the penetration conditions are not easy to grasp, which has little impact on the perforation of thin plate.

Selection of nozzle aperture:

The diameter of the nozzle is φ 1.0mm、 φ 1.5mm、 φ 2.0mm、 φ 2.5mm、 φ 3.0mm, etc. At present, nozzle aperture is often used φ 1.5mm、 φ 2mm two. The difference between the two is:

1) Sheet less than 3mm: φ 1.5mm, the cutting surface will be fine; use φ 2mm, the cutting surface will be thick, and the corner is prone to melting stains.

2) Thick plates above 3mm: due to the high cutting power of NC optical fiber metal laser cutting machine, the relative heat dissipation time is longer, and the relative cutting time is also increased. use φ 1.5mm, small gas diffusion area, so it is not stable when used, but it is basically available. use φ 2mm, large gas diffusion area and slow gas flow rate, so it is relatively stable during cutting.

3) Diameter φ The hole diameter of 2.5mm can only be used for cutting thick plates above 10mm. To sum up, the size of nozzle aperture has a serious impact on cutting quality and perforation quality. At present, laser cutting is mostly used φ 1.5mm、 φ 2mm diameter nozzle.

Therefore, when the nozzle aperture is selected to be larger, the relative protection of the focusing lens will be worse, because the spark splashing of the melt during cutting has a great chance of bouncing up, which will shorten the service life of the lens.

The concentricity between the center of the nozzle and the laser is one of the important factors causing the cutting quality, especially when the workpiece cut by the NC optical fiber metal laser cutting machine is thicker, its influence is greater. Therefore, the concentricity between the nozzle center and the laser must be adjusted to obtain a better cutting section.

Note: when the nozzle is deformed or there are molten stains on the nozzle, its impact on the cutting quality is the same as that described above. Therefore, the nozzle should be placed carefully without bumping to avoid deformation; The molten stains on the nozzle shall be cleaned in time. The quality of the nozzle requires high precision in manufacturing and correct method in installation. If the conditions of NC optical fiber metal laser cutting machine should be changed due to the poor quality of the nozzle, the nozzle should be replaced in time.

The above is the introduction of Jinan rebound CNC Machine Co., Ltd. to the nozzle of CNC optical fiber laser cutting machine. If you need to buy metal CNC cutting machine (whether plasma cutting machine or optical fiber laser cutting machine), you can contact us without hesitation.