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Key technology of laser cutting machine
Nov 13, 2017

There are two kinds of laser cutting technology: One is pulsed laser suitable for metal material. The second is the application of CW lasers to non-metallic materials, which is an important field of laser cutting technology.

Several key technologies of laser cutting machine are integrated technology of light, machine and electricity integration. In laser cutting machine, the parameters of laser beam, the performance and accuracy of the machine and the numerical control system directly affect the efficiency and quality of laser cutting. Especially for parts with high cutting precision or larger thickness, the following key technologies must be mastered and solved:

Focus Position Control Technology

One of the advantages of laser cutting is that the energy density of the beam is high, generally 10w/cm2. Because the energy density is inversely proportional to the area, the focal spot diameter is as small as possible so as to produce a narrow slit, while the focal spot diameter is also in direct proportion to the focal depth of the lens. The smaller the focal depth of focus lens, the smaller the focal spot diameter. But the cutting has the splash, the lens is too close to the workpiece to be possible to damage the lens, therefore general high-power CO2 laser cutting machine industrial application widely uses 5〃~7.5〃"(127~190mm) focal length. The actual focal spot diameter is between 0.1~0.4mm. For high quality cutting, the effective depth is also related to the lens diameter and the cut material. For example, with 5〃 lens cut carbon steel, focal depth of +2% range, that is around 5mm. Therefore, it is important to control the focus relative to the position of the surface of the cut material. Concern to the cutting quality, cutting speed and other factors, in principle, 6mm of metal materials, focus on the surface; 6mm of carbon steel, focusing on the surface; 6mm stainless steel, focusing on the surface.

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