Laser cutting machine cutting sheet metal material how to control the focus

The use of laser cutting machine to cut sheet metal material, the product cut out is not only high precision and smooth section without burr, whether it is cutting thick plate or thin plate can achieve very good results, but these effects are related to the focus control of laser cutting machine, so how to control it

What is focus control?

People who have used laser cutting machine understand that laser cutting machine in cutting different materials and different thickness of the material, in order to achieve a certain cutting effect, the focus of the laser beam will be set in different places, is the so-called focus.

In the early application of laser cutting, the main way of focusing is to rely on manual to complete, now with the development of laser technology, this manual focusing method has been gradually eliminated, automatic focusing function has begun to be slowly realized, such as Hangzhou royal animal automation equipment company laser cutting machine can be equipped with automatic focusing function. Then, some people will say that the optical path is integrated in the cutting head, by changing the height of the cutting head can not achieve the focusing function? When the cutting head is raised, the focus position is high; when the cutting head is lowered, the focus position is low. However, it turns out that it’s not as simple as everyone thought.

The bottom of the cutting head is the nozzle. In the cutting process, the distance between the nozzle and the workpiece is about 0.5 ~ 1.5mm. It may be considered as a fixed value, that is, the height of the nozzle is unchanged, so it can not be focused by lifting the cutting head.

The focal length of the focusing mirror is immutable, so you can’t expect to change the focal length to focus. If you change the position of the focusing mirror, you can change the focus position. If the focusing mirror goes down, the focus goes down. If the focusing mirror goes up, the focus goes up. This is really one way to focus. Automatic focusing can be realized by using a motor to drive the focusing mirror to move up and down.

With the automatic focus function, the machine can automatically adjust the focus to the appropriate position at high speed when processing the workpiece of different materials and thickness. This can significantly improve the laser cutting machine processing efficiency, thick plate perforation time will be greatly reduced. Therefore, for laser cutting machine, auto focus function is an important function.