How to distinguish the quality of laser cutting with automatic fiber laser cutting machine

Fully automatic fiber laser cutting machine, how much is a fiber laser cutting machine? A set of adjusted laser cutting is the energy released when the laser beam is shot to the old surface of the workpiece to melt and evaporate the workpiece to achieve cutting and engraving Purpose, with high precision. Fast cutting. Not limited to the limitation of cutting patterns, automatic layout saves materials, smooth cuts, low processing costs, etc. Features: Will gradually improve or replace dry transfer and winding will belong to the cutting process equipment, laser cutting machine system Generally, it is composed of hidden light generator, (external) beam transmission and inspection components, worktable (machine tool), microcomputer numerical control cabinet, cooler and computer (hardware and software). Product brief description Laser cutting machine equipment as a new type of tool is more and more maturely used in various industries, but including Weiguang cutting machine, micro-light bed engraving machine, laser marking machine, light welding machine, etc. Then laser How to use the cutting process, and how to distinguish the quality of laser cutting? First, the energy of the light is concentrated into a high-density beam in the form of light, and the beam is transmitted to the working surface to generate enough heat to make the material long. In addition, the high-pressure gas of the photoelectric mesh shaft directly removes the metal to be cut from the surface to the cutting day, which shows that the cutting process of Vigor is essentially different from the machining of the machine tool.

Fully automatic fiber laser cutting machine uses the laser beam emitted from the laser generator, through the optical system, the laser beam is focused into a high-power density laser beam irradiation conditions, low light The heat is absorbed by the material of the workpiece, and the temperature of the workpiece rises sharply. After reaching the boiling point, the material begins to vaporize and form holes. With the high-pressure airflow, as the beam moves relative to the workpiece, the material will finally form a slit. The process parameters during slitting (Cutting speed, laser power, gas pressure, etc.) and motion trajectory are all controlled by the numerical control system, and the alkene slag at the slit is blown away by a certain pressure of auxiliary gas. Generally speaking, the quality of laser cutting can be measured by the following 6 standard meters. 1. Cutting surface roughness Rz 2. Incision size has different residual pressure values u200bu200bfor different gases. When the nozzle pressure exceeds this value, the air flow is normal. Oblique shock wave, the gas flow rate changes from subsonic speed to over-sonic speed. This threshold is related to Pn, Pa Bieber and the degree of freedom (n) of gas molecules. Wave, the cutting pressure Pc drops, the air flow speed is reduced, and a vortex is formed on the surface of the workpiece, which weakens the effect of the air flow to remove the engraved material group and affects the cutting speed. Therefore, the spraying of the small holes at the end of the tapered hole is used, and the oxygen nozzle pressure is often below 3bar. In order to further increase the cutting speed of the light, according to the principle of aerodynamics, the positive microwave is not generated under the premise of increasing the spray pressure. Design and manufacture a zoom-type nozzle, namely Laval nozzle. For the convenience of manufacturing, the structure shown in Figure 4 can be used. The laser center of Hannover University in Germany uses 500WC02 laser, lens focal length 2.5*, small hole nozzle and Laval The nozzles were tested separately, as shown in Fig. 4. The test results are shown in 5: respectively represent the function relationship between the surface roughness Rz of the notch and the cutting speed Ve under different oxygen pressures for the N02, N04, and N05 nozzles.

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