Hole cutting and perforation technology of automatic fiber laser cutting machine

Fully automatic fiber laser cutting machine, but there are flying hidden during cutting, and the lens shop workpiece is too close to easily damage the mirrors. Therefore, the general high-power C02 laser cutting machine is widely used in industrial applications. 5•*7.5**(127~190mm) The focal length of the lens. The actual focal spot light is between 0.1~0.4mm. For high-quality cutting, the effective focal depth shift is related to the lens diameter and the material to be cut. For example, use a 5* lens to cut the carbon, and the focal depth is within +2% of the focal length, that is, about 5mm. Fourth, it is very important to control the position of the focus relative to the surface of the material to be cut. UMC to cut quality, cutting speed and other factors, in principle, 6ma metal materials, the focus is on the surface; 6mm carbon steel, the focus is above the surface; 6mt stainless steel, the focus is below the surface. Body size is determined by experiment There are three simple methods to determine the focus position in industrial production: (1) Printing method: move the cutting head from top to bottom, and print on the plastic plate with the beam beam, and the smallest diameter of the printing is the focus. (2) Inclined plate Method: Use a plastic plate placed obliquely at an angle to the vertical axis to pull it horizontally to find the smallest point of the microbeam as the focus: (3) Blue spark method: remove the spray and blow the air. Hit the pulse light on the stainless steel plate Up, make the cutting head move from top to bottom until the larger blue spark is the focus. For the cutting machine of the flying light path, due to the divergence angle of the beam, the optical path length of the near and distal ends of the cutting is different, and the focused beam size is as follows: A certain difference. The larger the diameter of the incident beam, the smaller the diameter of the focal spot. In order to reduce the change in the size of the focal spot caused by the beam size change before the gathering, the manufacturers of laser cutting systems at home and abroad have proposed some special devices For users to choose: 1) Collimator. This is a commonly used method, that is, add a collimator to the output end of the C02 laser to expand the beam. The endoscope (2) add a separate lower axis of the moving lens on the cutting head. The distance axis from the control nozzle to the material surface is two independent parts.

When the working table of the machine tool moves or the optical axis moves, the F axis of the beam from the proximal end to the forward end also moves at the same time, so that the beam is focused on the spot diameter Keep the same in the entire processing area. (3) Control the water pressure of the condenser lens (usually a metal reflective fusion system). If the size of the focused beam becomes smaller and the focal spot diameter becomes larger, the water pressure is automatically controlled to change the focus The curvature makes the focal spot diameter smaller. (4) The compensation optical path system in the x and y directions on the flying optical path cutting machine. When the cutting far optical path increases, the compensation optical path shortens: on the contrary, when the cutting near submersible optical path decreases, The supplementary light path is increased to keep the optical path length consistent. Main parameters: cutting perforation cutting perforation technology; any kind of hot-cutting technology, except for a few cases, which can start from the edge of the plate, generally a small hole must be pierced in the plate. Earlier, the punch was punched on the laser stamping compound machine. Make a hole, and then use a laser to start cutting from the small hole. There are two basic perforation methods for the digital laser cutting machine without a punching device: (1) Blasting perforation: The material forms a hole in the center after continuous laser irradiation. The pit is then quickly removed by the oxygen flow coaxial with the laser beam to form a hole. Generally, the size of the hole is related to the thickness of the plate. The average diameter of the hole is half the thickness of the plate, so for thicker plates Blasting perforation hole diameter: large and not round, it is not suitable for sexual use on parts with higher requirements (such as petroleum joint pipe), and can only be used for blasting materials.

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