Fiber laser cutting machine focus position analysis
You can see the fiber laser cutting machine focus position analysis:
1. The focus is on the surface of the board
This method also becomes a focal length of 0. When use, the focus of the cutting machine select to be close to the surface of the workpiece. And in this mode, the smoothness of the upper and lower surfaces of the workpiece is different. Generally, the cutting surface close to the focus is relatively smooth, and away from the cutting focus. The lower surface appears rough. This mode should base on the process requirements of the upper and lower surfaces in the actual application.
2. The focus is inside the plate
This method also becomes a positive focal length. When you need to cut a workpiece that is stainless steel or aluminum steel, the pattern of cutting points inside the workpiece often use. However, one disadvantage of this method is that the cutting surface is larger than the cutting point on the surface of the workpiece due to the focus principle. At the same time, the cutting airflow required in this mode is large, the temperature is sufficient. And the cutting perforation time is slightly longer. Therefore, when the material of the workpiece you choose is mainly stainless steel or aluminum material, the hardness of the material select.
3. The focus is on the top of the board
In this way we also become a negative focal length because the cutting point not locat on the surface of the cutting material nor inside the cutting material. But rather above the cutting material. This method mainly uses materials with high cutting thickness. And the reason why this method position above the cutting material is mainly because the slits required for the thick plates are large. Otherwise the oxygen delivered by the nozzles is extremely likely to cause insufficient defects and the cutting temperature lower. However, one of the disadvantages of this method is that the cutting surface is rough and not practical for high precision cutting.
In short, the focus position should vary depending on the material being cut.