How many kinds are polished?
Mechanical polishing, mechanical polishing by cutting material surface plastic deformation was removed after polishing and convex smooth surface polishing method, the general use of oilstone, wool wheel, sand paper, mainly manual, special parts such as rotary table surface, can use auxiliary tools such as high surface quality can be used the method of ultra precision polishing. Ultra precision polishing is the use of special tools, containing abrasive polishing liquid, pressed on the workpiece to be machined surface, high speed rotary motion. The surface using this technology can reach Ra0.008 m roughness, is the highest in the polishing method of optical lens mold. This method is often applied.
Chemical polishing chemical polishing is to make materials in chemical medium surface micro protruding part of a concave part so as to obtain preferential dissolution, smooth surface. The main advantage of this method is no need of complex equipment, polishing can be complex, can be polished workpiece, high efficiency. The core problem is the preparation of chemical polishing slurry the surface chemical polishing. The roughness of the general number 10 m.
The basic principle of electropolishing, electropolishing and electropolishing is the same as that of chemical polishing. That is, the surface of the material is easy to be polished by selective dissolution of the surface of the material. The effect of the cathode reaction can be eliminated by comparing with the chemical polishing, and the effect is betterElectrochemical polishing process is divided into two steps: (1) macro leveling, dissolution products to the electrolyte diffusion, the surface roughness of the material decreased, Ra > 1 m. (2), micro smooth, anodic polarization, surface brightness increased, Ra < 1 m.
