Grinding method

The flexible abrasive polishing tools and polishing media particles or other modification of the surface of the workpiece processing. Polishing can not improve the dimensional accuracy of the workpiece or geometric shape accuracy, but to obtain a smooth surface or specular gloss for the purpose, sometimes to eliminate gloss (extinction).
Usually buff as a polishing tool. Buff general use multi canvas, felt or leather crafted stacked on both sides with a metal circular plate clamped its rim coated abrasives and grease, etc. from the powder mixture evenly polish. Polishing, buff rotating speed (peripheral speed of 20 m / sec or more) is pressed against the workpiece, the abrasive surface of the workpiece and trace rolling cutting, machining to obtain a shiny surface, generally up to the surface roughness Ra0.63 to 0.01 micron; When using non-greasy matting polishing agent, shiny surfaces can to improve the appearance of extinction.
Mass production of steel ball bearings, often using barreling approach. Rough polishing will be a lot of balls, lime and abrasives on pot-shaped drum tilted, the drum rotates, the ball and abrasive in the barrel rolling crash at random convex front surface to achieve the removal of the surface roughness is reduced purpose, can remove a margin of about 0.01 mm.
Fine polishing ball when loaded in barrels and fur pieces, available hours continuous rotation dazzling bright surface. Polishing precision line scale is machined surface immersed in, carried abrasive powder, polishing powder, polishing powder particle size W5 ~ W0.5 by the alumina powder and cerium oxide powder combined together. Uniform fine polishing using material degreased thin wood or a special felts, its trajectory uniform dense mesh, the surface roughness after polishing is less than Ra0.01 microns, the enlarged 40 times under the microscope than any surface defects. There are also other methods electrolytic polishing.