Polishing, high-speed rotation of the polishing wheel (circumferential speed of 20 m / s or more) to the workpiece, the abrasive surface of the workpiece rolling and micro-cutting, resulting in bright machined surface, the surface roughness can generally reach Ra0.63 ~ 0.01 micron; when using a non-greasy matting agent, the matte finish can be exfoliated to improve appearance. High-volume production of steel balls, often using drum polishing method.
Rough throwing will be a large number of steel balls, lime and abrasive on the tilt of the pot-shaped drum, the drum rotation, the ball and the abrasive and so on in the barrel rolling collision to achieve the removal of surface convex front and reduce the surface roughness Purpose, can be removed about 0.01 millimeters margin.
Refined when the barrel filled with steel balls and fur pieces, continuous rotation for hours to get bright and shiny surface. The polishing of the precision line ruler is that the processing surface is immersed in the polishing liquid, and the polishing liquid is made by mixing the chromium oxide powder with the particle size of W5 ~ W0.5 and the emulsion liquid. The polishing wheel is made of wood with finely-grained material or special fine felt, and the movement path is uniform and dense mesh. The surface roughness after polishing is not more than Ra0.01關m, observed under a magnification of 40 times under a microscope Not any surface defects. In addition there are methods such as electrolytic polishing.