Early rise in 1.5kw fiber laser cutting machine applications, focusing depends on manual, and now with the development of laser technology, manual focusing will eventually be phased out and will be explored for auto focus ingest functions, such as high-performance high-speed laser cutting machines have high-efficiency fully automatic focusing. So, some people will say, light road is integrated in the cutting head, simple change in the laser height is not good? The cutting head is raised, the focus position is high, the cutting head is lowered, and the focus position is low. However, it has proved to be not as simple as everyone thinks.
The bottom of the cutting head is the nozzle, in the cutting process, the distance between the nozzle and the workpiece (nozzle height) is about 0.5 to 1.5mm, may be regarded as a fixed value, that is, the height of the nozzle is unchanged, so can not be raised by the laser head to focus.
The focal length of the focus mirror is immutable, so it is not realistic to focus by changing the focal length. If you change the position of the focus mirror, the corresponding change of focus position: the focus mirror drops, then the focus is down, the focus mirror is up, the focus is up. -- It's really a way to focus. Auto focus inge is achieved by using a motor-driven focus mirror for up and down motion.
Another way to adjust autofocus is to place a variable curvature mirror (or adjustable mirror) before the beam enters the focus mirror, by changing the curvature of the mirror, changing the divergence angle of the reflector beam, changing the focus position.
With autofocus, the machine relies on CNC to automatically quickly adjust the focus to the right position when machining workpieces of different materials and thicknesses. This can significantly improve the processing efficiency of high-speed 1.5kw fiber laser cutting machine, and the time of thick plate perforation will be greatly reduced.
Therefore, for high-speed 1.5kw fiber laser cutting machine tools, auto focus function is an important and indispensable function.
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