CNC can be processed directly high-gloss mirror?
With the advent of high-performance, high-precision CNC machine tools and excellent performance metal cutting tools, CNC high-gloss machining has made a big breakthrough. Milling (car) generation grinding has become a prerequisite and has been pursued by the machining industry purpose. The principle of CNC high-gloss machining is that in the process of setting up and disposing CNC machining, the special special cutting tools and common scientific and scientific cutting parameters are adopted to realize the sparkling machining surface results.
The use of fine CNC machine tools is the premise of high-gloss machining. Machine must have excellent rigidity and accuracy, such as precision CNC engraving machine (as usual speed: 20000 r / min).
Achieve high gloss results thanks to the use of diamond tools. Diamond tooling is a standard set-up deployment for the CNC high gloss processing industry.
A good diamond cutting edge can not see any nicked edges under a high magnification microscope. Cutting edge can play long-term cutting and stabilization. Diamond and non-ferrous metal friction coefficient is very small, the chip is not easy to stick in the blade, buildup Jianjian tumor occurs, so the process is always linked to the blade cutting the workpiece, the brightness can be guaranteed.
High-light milling tool cutting edge wide and accept smaller rake angle is about negative and near zero inclination angle, when the high-speed milling cutting tool on the one hand to carry out high-speed cutting, on the other hand because the tool rake angle is small, Therefore, the cutting edge of the tool forms a scraping and squeezing effect on the surface to be machined, so that the surface of the workpiece is highly smooth and the hardened layer is produced at the same time, thereby improving the surface hardness of the workpiece and the wear resistance of the workpiece.
Except for how many shapes of a tool are related to the shape of the workpiece, it depends mainly on the physical properties of the workpiece material. Machining plastic materials such as copper, aluminum and nickel, the rake angle of the tool is 0o, and the relief angle is usually between 5o and 10o. The tool nose radius is usually 0.5 to 5 mm. The high rigidity of the machine tool can accommodate a large radius so as to reduce the surface roughness of the workpiece. If smaller tool nose radius is accepted, the feed amount should be eliminated to prevent the surface roughness from deteriorating . When processing sparse materials such as silicon, germanium, CaF2 and ZnS, the rake angle of the tool is usually selected between -15o and -45o. The optimum rake angle depends not only on the material itself, but also on the rigidity of the machine tool and clamping system, which is best determined by the production test. High-light milling disc cutter selection, diameter of the cutter diameter of the plane to be milled, even if the selection of larger diameter, with good rigidity and good blade positioning accuracy. The size of the cutter will change the lines and results of the plane being milled, the number of blades can be single or multiple, but the multi-blade is equally difficult and time-consuming to change the blades. The single-cutter milling results are better .
Diamond tools look expensive and costly to invest once, but natural diamond is extremely hard and wear resistant. According to statistics, the life of diamond turning tools is 25 times that of high-speed steel turning tools, each diamond tool can be reground 6 to 15 times. As a result, the tool costs per part are minimal and provide a solid size and high lightness.