With the development of laser technology and the continuous improvement of human material level, laser cutting machines have been widely used in all walks of life, especially the requirements of arts and crafts continue to be refined, which is inseparable from the continuous accuracy of laser cutting machines. However, when using laser cutting equipment, do you know how to locate the focus of laser cutting machine? Cutting is to find a good focus. I believe this is a topic that everyone is very concerned about. Let's tell you how to locate the influence of focus on cutting material and effect

1. The focus is positioned on the workpiece surface

In the fiber laser cutting machine, the workpiece surface has different smoothness. Generally speaking, the cutting surface near the focus is relatively smooth, while the lower surface far from the cutting focus appears rough. This mode should be determined according to the process requirements of the upper and lower surfaces in practical applications.

2. The focus is positioned inside the workpiece

This method is also called positive focus. When the workpiece you need to cut is stainless steel or aluminum steel plate, you often use the mode that the cutting point is inside the workpiece. However, one disadvantage of this method is that because the focus is far away from the cutting surface, the cutting amplitude is relatively larger than that of the cutting point on the workpiece surface. At the same time, the cutting airflow required in this mode is larger, the temperature is sufficient, and the cutting and piercing time is slightly longer. So when you choose the material of the workpiece mainly stainless steel or aluminum and other materials with high hardness.

3. Focus on the workpiece

This method is mainly used for cutting materials with high thickness, and the focus is positioned above the cutting material, mainly because the thick plate needs a large cutting range, otherwise the oxygen delivered by the nozzle is very likely to be insufficient, resulting in the reduction of cutting temperature. The disadvantage of this method is that the cutting surface is relatively rough and is not suitable for high-precision cutting.

Methods for locating the focus position in processing and production:

NC positioning dotting method (printing method): make the cutting head move from top to bottom, and carry out laser beam printing on the plastic plate, with the printing diameter as the focus. This is a method that is widely used. For more details, please contact us for information.

In addition, an independent lower axis of the moving lens is added on the cutting head, which is two independent parts from the axis controlling the distance between the nozzle and the material surface. When the machine tool workbench moves or the optical axis moves, the beam moves from the near end to the far end at the same time, so that the diameter of the spot after the beam is focused remains consistent in the whole processing area.