The main technology of laser cutting machine

Laser cutting machine actual focal spot diameter in 0. 1 to 0. Between 4 mm. With 5 'of lens cutting carbon steel, for example, the focal length of focal deeply + 2% range, namely around 5 mm. Especially for cutting parts with high precision or large thickness, must grasp the hub and to solve the following techniques: 1, the focus position control technology, laser cutting is one of the strengths of the beam of high energy density, general 10 w/cm2. Because the energy density is proportional to the 4 / PI d2, so the focal spot diameter as small as possible, in order to produce a narrow kerf width; At the same time focus spot diameter and is directly proportional to the depth of focus of the lens. Concern to the cutting quality and cutting speed, in principle, 6 mm of metal materials, focus on the surface; 6 mm carbon steel, focus on the surface; Below the surface of 6 mm stainless steel, the focus is on. But cutting has splash, easy to get too close to the workpiece lens damage, so generally high power CO2 laser cutting machine widely used in industry application of '5 ~ 7. 5 '(' 127~190mm) The focal length. For high quality cutting, the effective depth of focus and is cut and lens diameter and related materials. So control focal point relative to the cut material on the surface of the position is very important. Laser cutting machine in detail size determined by experiment.

in the laser beam parameters in laser cutting machine, laser cutting machine machine and numerical control system function and accuracy are directly affect the efficiency and quality of laser cutting. The smaller the focusing lens focal depth, focal spot diameter. 。