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How To Accurately Adjust The Focus Of The Laser Cutting Machine?

- Jan 08, 2019 -

       The application of laser cutting machine in the metal industry is becoming more and more popular. Today, I would like to give you a little suggestion: high precision, high accuracy is the survival of metal laser cutting, laser cutting machine, if the cutting precision of the metal laser cutting machine cannot reach present, the problems of domestic metal laser cutting machines are basically reflected in the focus of the problem, so what is the good way to improve the cutting precision of the laser cutting machine and accurately adjust the focus of the metal laser cutting machine?

       The first is the oblique plate method of adjusting the focus of the metal laser cutting machine, that is, the plastic plate obliquely placed at an angle with the vertical axis is horizontally pulled, and the minimum point of the laser beam of the metal laser cutting machine is focused. Next is the printing method of adjusting the focus of the metal laser cutting machine, that is, the cutting head of the metal laser cutting machine is moved from top to bottom, and the laser beam is printed on the plastic plate, and the minimum diameter of the printing is the focus.

        Secondly, it is more troublesome. The metal laser cutting machine adjusts the focus of the parallel light pipe method. Although it is troublesome, it is also a common method, that is, adding a parallel light pipe to the output end of the metal laser cutting machine for beam expansion processing, after beam expansion As the beam diameter becomes larger, the divergence angle becomes smaller, making the beam size close to the near end and the far end in the cutting working range. A lower axis of a separate moving lens is added to the cutting head. The metal laser cutting machine has two separate parts from the Z-axis that controls the distance from the nozzle to the surface of the material. When the machine table moves or the optical axis moves, the beam also moves from the proximal end to the distal F axis, so that the spot diameter remains the same throughout the processing area after the beam is focused.

        Finally, the blue spark method of the metal laser cutting machine to adjust the focus, remove the nozzle of the metal laser cutting machine cutting head, blow the air, and hit the laser on the stainless steel plate, so that the cutting head moves from top to bottom until the blue spark is at the maximum. For the focus, this can be used to calculate the focus. In the subsequent cutting process, the corresponding focusing is taken according to the different plate thickness of the plate.

       For the cutting machine of the flying light path, the optical path length is different when the proximal end and the distal end are cut due to the beam divergence angle. There is a difference in beam size before focusing. The larger the diameter of the incident beam, the smaller the diameter of the focal spot. Adjusting the focus of the metal laser cutting machine is equivalent to improving the working efficiency of the metal laser cutting machine, and further improving the production efficiency of the entire enterprise.