There are some more or less losses in the long-term use of fiber laser cutting machine, such as slow cutting speed and poor cutting accuracy. Many people think that the laser power has decreased. There are many reasons that affect the power reduction of laser cutting machine, not necessarily the problem of laser. The following is an analysis of the reasons for the power reduction of the fiber laser cutting machine:
First is the focus position, which affects the cutting accuracy, especially the focus spot diameter. The focal spot diameter should be as small as possible to produce a narrow slit; The focal spot diameter is proportional to the focal depth of the focus lens. The smaller the focal depth of the focus lens, the smaller the focal spot diameter.
The second is the distance between the nozzle. The distance between the workpiece and the nozzle also affects the power reduction of the fiber laser cutting machine. Too far away will cause unnecessary waste of kinetic energy, and too close away will affect the dispersion ability of the sputtered cutting products. The appropriate distance is 0.8mm. In addition, the fiber laser cutting machine mainly uses its follow-up adjustment to cut the workpiece with uneven surface. The height of the nozzle and the workpiece should always be consistent during operation.
Thirdly, the cutting speed has a great impact on the power of the fiber laser cutting machine. The cutting speed is proportional to the power of the fiber laser cutting machine. At the same time, the cutting quality is related to the laser beam quality, and also to the characteristics of the laser beam focusing system, that is, the size of the laser beam after focusing has a great impact on the laser cutting quality.
Then is the auxiliary gas. The size of the auxiliary gas and gas pressure also have an impact on the power of the fiber laser cutting machine. It is recommended to use compressed air or inert gas as the auxiliary gas. If the thickness of the processed material increases or the cutting speed is slow, the gas pressure should be properly reduced. Cutting with lower gas pressure can prevent the edge from frosting.
The last is the laser power. If the first four items have been eliminated, the laser power is considered to be decreased. Some parts of any equipment will age after being used for a long time. The laser is the core and important part of the fiber laser cutting machine, and the power will drop after a long time of use. In addition to the above points, the performance, size and thickness of the processed materials will also affect the power reduction of the fiber laser cutting machine.