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Several ways to achieve Mirror processing for CNC machining parts !

Several ways to achieve Mirror processing for CNC machining parts !

Mirror processing refers to the processing of the surface can reflect the image like a mirror, this level has reached a very good workpiece surface quality, mirror processing can not only create a high "appearance level" for the product, but also reduce the gap effect, prolong the fatigue life of the workpiece;It is of great significance in many assembly and sealing structures.Polishing mirror processing technology is mainly used to reduce the surface roughness of the workpiece. When choosing the polishing process method for the metal workpiece, different methods can be selected according to different needs. The following are several common methods of polishing mirror processing technology.

1, mechanical polishing, mechanical polishing is to rely on cutting, surface plastic deformation after removed by polishing the convex part of the smooth surface polishing method, commonly used article oil stone, wool wheel, abrasive paper, etc., with manual operation is given priority to, special components such as surface of solid of revolution, can use tools such as turntable, high surface quality can be used over lapping method.Super-fine grinding and polishing is made of special abrasive tools. In the grinding and polishing liquid containing abrasive materials, the workpiece is pressed tightly on the machined surface to make high-speed rotating motion.The surface roughness of RA0.008μm can be achieved by using this technique, which is the highest among various polishing methods.This method is often used in optical lens moulds.

2, chemical polishing chemical polishing is to make the material in the chemical medium surface microscopic convex part of the concave part of the priority to dissolve, so as to get a smooth surface.The main advantage of this method is that it does not need complex equipment, can polish the workpiece of complex shape, can polish many workpiece at the same time, high efficiency.The key problem of chemical polishing is the preparation of polishing fluid.The surface roughness obtained by chemical polishing is generally 10μm.

3. Electrolytic polishing The basic principle of electrolytic polishing is the same as that of chemical polishing, which depends on the selective dissolution of the tiny protrusions on the surface of the material to make the surface smooth.Compared with chemical polishing, the effect of cathodic reaction can be eliminated and the effect is better.Electrochemical polishing process is divided into two steps :(1) macro leveling solution diffuses into the electrolyte, and the geometrical roughness of the material surface decreases, RA>1 microns.(2), low light level anode polarization, surface brightness increased,Ra<1 microns.

4, Hawker can mirror processing equipment
As a new polishing technology, it has unique advantages in many kinds of metal parts processing.It can replace the traditional grinding machine, rolling machine, boring machine, honing, polishing machine, sand belt machine and other metal surface finishing equipment and technology;The high finish of the metal workpiece becomes easy to process.Hawker energy can not only be polished, but also bring a lot of additional benefits: it can improve the surface finish of the processed workpiece by more than 3 levels (roughness Ra value can easily reach below 0.2);And the surface microhardness of the workpiece is increased by more than 20%;The surface wear resistance and corrosion resistance of the workpiece are greatly improved.Hawker can be used to deal with a variety of stainless steel and other metal workpiece.

5, ultrasonic polishing workpiece into the abrasive suspension and placed together in the ultrasonic field, relying on the oscillating effect of ultrasonic, abrasive grinding and polishing on the surface of the workpiece.Ultrasonic machining has small macroscopic force and will not cause the deformation of the workpiece, but it is difficult to make and install the tooling.Ultrasonic machining can be combined with chemical or electrochemical methods.On the basis of solution corrosion and electrolysis, ultrasonic vibration is applied to stir the solution, so that the dissolved products on the surface of the workpiece are separated, and the corrosion or electrolyte near the surface is uniform.Ultrasonic cavitation in the liquid can also inhibit the corrosion process, which is conducive to surface lighting.

6, fluid polishing fluid polishing is to rely on the high-speed flow of liquid and the abrasive particles carried by the erosion of the workpiece surface to achieve the purpose of polishing.Commonly used methods are: abrasive jet processing, liquid jet processing, fluid power grinding, etc.Hydrodynamic grinding is driven by hydraulic pressure, which makes the liquid medium carrying abrasive particles flow through the workpiece surface at high speed.The medium is mainly made of special compounds with good fluidity under low pressure (polymer material) and mixed with abrasive, which can be made of silicon carbide powder.

7, mirror polishing mirror polishing, magnetic polishing magnetic grinding polishing is the use of magnetic abrasive under the action of the magnetic field to form an abrasive brush, the workpiece grinding processing.This method has the advantages of high processing efficiency, good quality, easy control of processing conditions and good working conditions.With suitable abrasive, the surface roughness can reach Ra0.1μm.The polishing said in the plastic mold processing and other industries required surface polishing is very different, strictly speaking, the polishing of the mold should be called mirror processing.It has high requirements not only for the polishing itself but also for the surface smoothness, smoothness and geometric accuracy.Surface polishing generally requires only a shiny surface.The standard of mirror processing is divided into four levels :AO= RA0.008μm,A1= RA0.016μm, A3= RA0.032μm,A4= RA0.063μm. Because the methods such as electropolishing and fluid polishing are difficult to accurately control the geometric accuracy of parts, and the surface quality of chemical polishing, ultrasonic polishing, magnetic grinding polishing and other methods can not meet the requirements, so the mirror processing of precision molds is mainly mechanical polishing.

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