The accessory of laser pointer should also be maintained well

The accessory of laser pointer should also be maintained well.
To further improve the laser cutting speed, according to aerodynamic principles, the pressure in the premise of improving the nozzle does not produce normal shock, nozzle design and manufacture of a zoom, that Laval (Laval) nozzle. Figure 4 can be used to facilitate the manufacture of the structure. Laser Centre, University of Hannover, Germany using 500WCO2 laser, lens focal length 2.5 〃, the use of Laval nozzles and nozzle holes were tested, respectively, shown in Figure 4. The results shown in Figure 5: respectively, NO2, NO4, NO5 nozzle at different oxygen pressure, the cut surface roughness Rz and function of cutting speed Vc. NO2 can be seen from Figure hole nozzle in Pn as 400Kpa (or 4bar) when the cutting speed can only reach 2.75m/min (carbon steel plate thickness of 2mm). NO4, NO5 two kinds of Laval nozzle in Pn as 500Kpa to 600Kpa when cutting speed can reach 3.5m/min and 5.5m/min. General use of inert gas fusion cutting, if replaced by oxygen or other reactive gases, materials in the laser beam irradiation is lit, heated with oxygen to produce another chemical reaction heat, melt the cut is called oxidation. Different countries have different stipulations for the import duty of laser pointer .Laser Engraving: mainly in the surface of the object, carved into a bitmap and vector engraving two kinds: bitmap engraving: we first need PHOTOSHOP in our hanging sculpture of graphics processing and converted to monochrome BMP format, Then the laser cutting software dedicated to open the graphic file. According to our processing of materials that we carry out the appropriate parameters set on it, and then click on Run, laser engraving machine graphic files will be generated based on lattice results for carving. Vector Engraving: Using vector software such as Coreldraw, AutoCad, Iluustrator other layout design and export graphics for the PLT, DXF, AI format, marking machine, laser cutting and engraving re-dedicated software to open the graphic file, sent to the laser engraving machine in processing. The list of featured products of laser pointer can be shown to the customer.
Should be noted that cutting the workpiece and the nozzle pressure Pc is a function of distance. As the oblique shock wave reflection at the air border many times, so cutting pressure cyclical changes. The first high-pressure zone near the cutting nozzle, the nozzle exit surface to a distance of about 0.5 ~ 1.5mm, cutting a large and stable pressure Pc, is the cutting lever commonly used in industrial production process parameters. The second area of high pressure cutting nozzle exit of about 3 ~ 3.5mm, cutting pressure Pc is also large, can also achieve good results, and help protect the lens, to improve their life. Curve on the other high-pressure area due to cutting too far away from the nozzle exit, is difficult to match with the focused beam can not be used. In summary, CO2 laser cutting technology is China's industrial production has been more and more applications, research and development abroad is higher cutting speed and cutting thicker steel technology and equipment.