Views: 33 Author: Site Editor Publish Time: 2021-10-01 Origin: Site
fiber laser cutting machines are often the keystone of the whole production line inside a factory. When the focal point of the fiber laser cutting machine is in the right position, the best cutting effect can be obtained with the smallest gap and the highest efficiency. Generally, different laser focus positions correspond to different cutting surface roughness. According to the needs of cutting focus and the types of cutting material, operators can determine the adjustment of the focus position of the fiber laser cutting machine to optimize the cutting quality. So, how to adjust the focal length of fiber laser cutting machines exactly? Please let me introduce them to you in the following contents.
l Here is the content list:
l How to adjust the focal length according to the needs?
How to adjust the focal length according to the needs?
Generally, based on different needs and different kinds of material of the workpieces. The best focal lengths of fiber laser cutting machines are different. Generally, three types of focal length are used quite often:
1. Negative focal length
Negative focal length is mainly used when cutting thick metal plates (the cutting focus is on the cutting material). The negative focal length cutting of thick plates requires a larger cutting width. Insufficient oxygen will cause the nozzle to lower the cutting temperature, and the cutting surface is relatively rough, so it is not suitable for high-precision precision cutting.
2. Internal negative focal length
The internal negative focal length (the cutting focus is inside the cutting material) is usually used in fiber laser cutting machines for cutting aluminum, aluminum alloy, and stainless steel. Cut the surface according to the focusing principle. The cutting width on the surface of the workpiece is greater than the cutting point. In this mode, the airflow of the fiber laser cutting machine is large, the temperature is high, and the time to cut the hole is long. Therefore, this cutting method is mainly used for cutting hard materials such as aluminum or stainless steel.
3.0 focal length
0 Focal length (the cutting focus is on the surface of the cutting material) is usually a focus positioning method suitable for cutting SS41, SPH, SPC, and other materials. The focus of 0-focus cutting is close to the surface of the workpiece. Because the smoothness of the cut surface is not the same, the upper surface of the cut is relatively smooth, while the lower surface is relatively rough. The positioning method of this cutting focus needs to be determined according to the actual process requirements of the upper and lower surfaces. According to the actual situation, it is very important to determine the focus position of the fiber laser cutting machine. A reasonable focus position can maximize the use of laser energy and make the fiber laser cutting machine work more efficiently.
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