Do you know how to focus a laser cutter?
2021-07-13
As we all know, Laser cutting machine has incomparable advantages in cutting metal plate, it is not only high accuracy and smooth section without Burr, whether it is cutting thick plate or thin plate can achieve good results. However, these effects are the focus of the Laser Cutting Machine control is related. So, what is focus control? laser cutting machine in cutting different materials and different thickness of the plate, in order to achieve a better cutting effect, the focus of the laser beam will be set in different places, this is what we call focusing. At the beginning of the application of laser cutting, the main method of focusing is done by hand. Now, with the development of laser technology, this method of manual focusing has been gradually eliminated, and the auto-focusing function has been gradually realized, for example, the full range of high-energy laser cutting machine are equipped with a fully automatic focusing function. Well, some people will say that the light path is integrated in the cutting head, by changing the height of the cutting head is not to achieve the focusing function? When the cutting head is raised, the focus position is high, and when the cutting head is lowered, the focus position is low. It turns out, however, that it's not as simple as everyone thinks. The bottom of the cutting head is a nozzle. During the cutting process, the distance (the height of the nozzle) between the nozzle and the workpiece is about 0.5 ~ 1.5 mm, so can not through the lifting cutting head to focus (otherwise can not complete the cutting process) . The focal length of the focusing lens can not be changed, so you can not expect to change the focal length to focus. If you change the position of the focusing Lens, you can change the focus position: If the focusing lens goes down, the focus will go down, if the focusing lens goes up, the focus will go up. This is really a way of focusing. The auto-focusing can be realized by using a Motor to Drive the Focusing mirror to move up and down. Another auto-focusing method is: Before the beam into the focusing mirror, a variable curvature mirror (or adjustable mirror) , by changing the curvature of the Mirror, change the divergence angle of the reflected beam, thus changing the focus position. With the auto-focusing function, the machine can automatically adjust the focus to the most suitable position when processing the workpiece with different material and thickness. This can significantly improve the processing efficiency of laser cutting machine, heavy plate perforation time will be greatly reduced. Therefore, for the laser cutting machine, auto-focusing function is an important and indispensable function.
