The laser cutting machine is a metal processing tool integrating optical, mechanical and electrical technologies. It is composed of advanced integrated laser cutting head, laser, operation control system and other components. During the cutting process, the intelligent operating system controls the equipment to run according to the command. The laser gathers the laser energy and outputs it to the laser cutting head. The laser cutting head will focus the energy emitted by the laser beam to form a laser beam to the surface of the workpiece to be cut, so that it can melt or burn. Then, the cutting gas is supplemented to blow away the slag. The cutting head moves on the surface of the workpiece, forming a kerf, and separating the workpiece.
The laser cutting head directly affects the processing performance and quality of the laser cutting machine. Because the laser cutting head is expensive, when using the laser cutting machine for processing, in order to protect the internal optical path and core components of the laser cutting head, especially the expensive components such as collimation and focusing lens, the laser cutting head will be installed with protective lenses to prevent cutting dust and splashes.
If the protective lens is frequently burned out, it is necessary to pay attention to this situation and determine what causes the frequent burning of the protective lens and whether it is a quality problem or a routine maintenance problem of the protective lens. Next, I will introduce some reasons for the frequency burning of the protective mirror under the laser head:
1. The blowing delay is too small, which causes the laser to go out first than the gas. The blowing parameters in the global parameters are delayed, too small, or zero. To solve this problem, it is necessary to modify the first point blowing, air exchange, and gas switching delays. It is recommended to set it to 200-500 milliseconds.
2. No perforation process is set, it is recommended to adjust the perforation process by more than 1mm.
3. It is recommended to clean the gas pipe in time because of the internal pollution of the gas pipe, which leads to cutting pollution.
4. The protective lenses are defective. It is recommended to use the original protective lenses.
5. The internal protective mirror is polluted.
In addition, the cleanliness of the protective lens is also a key factor determining the durable use of the protective lens. Whether the protective lens is clean or not directly affects the processing performance and quality of the output of the laser cutting machine. If the lens is dirty, it will not only affect the cutting effect and efficiency, but also further cause the burning of the internal parts of the cutting head and the laser output head. Therefore, it is necessary to use the protective lens with good material, high transmittance and small thermal expansion coefficient first, When the lens is dirty during processing, it needs to be cleaned or replaced.
