What determines the thickness of carbon steel cut by CNC fiber laser cutting machine?
Generally speaking, the function of the focusing lens of the laser cutting machine is to focus the beam. These focal points can be adjusted, not fixed, some are automatically focused and some are manually focused. However, each lens has its own focal length, but most of the phase difference range is not very large.
After determining the focal length, first you must grasp the focus and find the focus on the lens, and then adjust the focal length according to the actual quality during processing.
The focal length of the focusing lens of each laser cutting machine is different. The focal length of the focusing lens of a general small laser cutting machine is basically 50.8MM and 63.5MM, which is actually the distance from the focusing lens to the material. We can use a steel ruler to measure the height of the lens.
The thickness of carbon steel cut by CNC laser cutting machine is mainly determined by the laser output power. Taking carbon steel as an example, a 1KW laser cutting machine can cut 9 thick (that is, 9mm), and a 1.5KW can cut 19 thick; for stainless steel, a 2.5KW laser cutting machine can only cut 15 thick. If it is thicker, a high-power laser of more than 3kw is required.
However, for carbon steel plates within 10mm, a fiber laser cutting machine below 1000W can be used for cutting. This is because the cutting width of laser cutting is narrow, generally between 0.1 and 0.5mm; the cutting accuracy is very high, less than 0.05mm, and the distance error of the hole center is between 0.1 and 0.4mm, and the error of the contour size is also between 0.1 and 0.5mm; the cutting section is smooth, and the cut roughness is less than 25μm. After the workpiece is cut, it does not need to be processed again and can be directly welded.
For carbon steel plates above 10mm and below 20mm, a 2000W CO2 laser cutting machine can be selected, because the current domestic fiber laser cutting machines cannot cut steel plates of this thickness. However, compared with wire cutting, CNC plasma cutting and water cutting, metal fiber laser cutting is much more efficient and the cutting cost is much lower.
