CNC fiber laser cutting machine can be divided into fiber laser metal plate cutting machines and fiber laser tube cutting machines according to the shape of the processed metal. No matter what shape of metal fiber laser cuts, its cutting process parameters are unchanged. The following Jinan REBOUND CNC machine co.,ltd takes the CNC fiber laser cutting machine of 2000w Raycus laser generator as an example, to talk about how to determine the CNC fiber laser cutting process parameters. 2000w CNC fiber laser cutting machine equipment is mainly composed of laser, light guide system, CNC motion system, automatic height adjustment cutting head, working platform and blowing high-pressure gas and other systems.

beam pattern

Fundamental mode, also known as Gaussian mode, is the most ideal mode for CNC fiber laser cutting, mainly in low-power lasers with power less than 1kW. The low-order mode, which is relatively close to the fundamental mode, mainly occurs in medium-power lasers of 1 to 2 kW. Multimode, a mixture of higher-order modes, occurs in high-power lasers with power greater than 3kW.

Under the same power, the focus of multi-mode is poor, and the cutting ability is low. The cutting ability and cutting quality of single-mode laser are better than multi-mode.

Laser power

The laser power required for laser cutting mainly depends on the cutting material, material thickness and cutting speed requirements. The laser power has a great influence on the cutting thickness, cutting speed and incision width of the CNC fiber laser cutting machine. Generally, as the laser power increases, the thickness of the material that can be cut increases, the cutting speed increases, and the incision width also increases.

focus position

The focus position has a great influence on the incision width. Generally, the focus is located at about 1/3 of the thickness of the material below the surface of the material, the cutting depth is the largest, and the mouth width is the smallest.

focal moment

When cutting thicker steel plates, a beam with a longer focal length should be used to obtain a cutting surface with good verticality. The larger the depth of focus, the larger the spot diameter, the smaller the power density, and the lower the cutting speed. To maintain a certain cutting speed, it is necessary to increase the laser power. It is advisable to use a light beam with a small focal length for cutting thin plates, so that the diameter of the light spot is small, the power density is large, and the cutting speed is fast.

auxiliary gas

Oxygen is often used as the cutting gas for cutting low carbon steel, in order to use the iron-oxygen combustion reaction heat to promote the cutting process, and the cutting speed is fast, the incision quality is good, and the incision without slag can be obtained. The pressure increases, the kinetic energy increases, and the slag discharge capacity increases; the size of the cutting air pressure is determined according to the factors of material, plate thickness, cutting speed and cutting surface quality. In addition, the purity of oxygen has a certain influence on the cutting speed. For example, if the oxygen purity is reduced by 2%, the cutting speed of the CNC fiber laser cutting machine will be reduced by 50%.

Nozzle structure

The structure and shape of the nozzle and the size of the light outlet also affect the quality and efficiency of laser cutting. Different cutting requires different nozzles. Commonly used nozzle shapes are: cylindrical, conical, square and other shapes. The laser cutting of CNC fiber laser cutting machine generally adopts coaxial (airflow and optical axis concentric) blowing method. In order to ensure the stability of the cutting process, it is usually necessary to control the distance between the nozzle end face and the workpiece surface, generally 0.5 to 2.0 mm, so that the cutting can be carried out smoothly.

The above is the introduction of Jinan REBOUND CNC machine company on how to determine the process parameters of CNC fiber laser cutting. Thanks for watching. If your company needs CNC plasma cutting machine and CNC fiber cutting machine (fiber laser metal plate cutting machine and fiber laser tube cutting machine), please contact us in time.