Precautions when laser cutting machine cuts sheet metal

When using laser cutting machine equipment, the cutting surface close to the focus is relatively smooth. Do you know how the focus of the laser cutting machine is positioned? The first step of cutting is to find a good focus position, which is a topic that everyone is very concerned about. First, let’s learn together how to locate the focus.

In the fiber laser cutting machine, the surface of the workpiece has different smoothness, and the lower surface away from the cutting focus appears rough. This mode should be determined according to the process requirements of the upper and lower surfaces in actual applications. Position the focus on the top of the cutting material. When the machine tool table moves or the optical axis moves, the spot diameter after the beam is focused remains consistent throughout the processing area. The beam also moves from the proximal end to the distal axis at the same time, mainly because the thick plate requires a large cutting width, otherwise the oxygen delivered by the nozzle is very likely to be insufficient and cause the cutting temperature to drop.

Since the focus is far away from the cutting surface, it and the axis that controls the distance from the nozzle to the material surface are two independent parts. This method is mainly used for cutting high-thickness materials. The disadvantage of this method is that the cutting surface is relatively rough and not practical for high-precision cutting. The cutting width is relatively larger than the cutting point on the surface of the workpiece. 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 is mainly stainless steel or aluminum and other hard materials, choose it.

Post time: Jan-06-2020

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