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Brief on the polishing process
Use of a flexible polishing tool and the abrasive particles or other polishing medium on the workpiece surface modification processing. The polishing can not improve the accuracy of the dimensions of the workpiece or geometrical accuracy, but for the purpose to obtain a smooth surface or specular gloss, also sometimes used to eliminate gloss (extinction). Usually as a polishing tool polishing wheel. Buff Usually stacked multilayer canvas, felt, or leather system, clamping with metal on both sides the circular plate, a uniform mixture of the polishing agent of the rim coated by micronized abrasives and fats, etc..
Polishing, the high-speed rotation of the buff (circumferential speed of 20 m / sec or more) pressure to the workpiece, the abrasive surface of the workpiece to produce rolling and trace cutting, thereby obtaining a bright machined surface, surface roughness, generally up Ra0.63 to 0.01 microns; when using a non-greasy extinction polishing agent to improve the appearance of shiny surfaces extinction. Mass production of the bearing balls, often using barrel polishing method. Rough polishing a large number of steel balls, lime and abrasive on the tilt of tank-like drum, the drum rotates, the ball and abrasive scroll random collisions in the barrel to achieve the removal of surface convex front and reduce the surface roughness The purpose can be removed to a margin of about 0.01 mm. The highly polished cask loaded steel ball and fur pieces, continuous rotation can get a few hours of bright shiny surface.
Precision lineolatus feet polishing machined surface is immersed in the polishing solution, the polishing liquid from a particle size of W5 ~ W0.5 chromia micronized and emulsion mixture. Buff uniform fine material made degreasing treatment of wood or a special thin blankets, its trajectory is the uniform and dense mesh, the surface roughness after polishing of not more than Ra0.01 μm, at 40 times magnification microscope , no surface defects were observed. There are also methods such as electrolytic polishing. The polishing material polishing material for the substance was thrown polishing glass, metal, leather, semiconductor, plastics, precious stones Jade. Polishing stainless steel. Such as glass polishing using red iron oxide, tin dioxide, aluminum oxide, cerium oxide, barium carbonate, chalk, clay, diatomaceous earth, powdered mixture with water into a suspension, etc. with use after. Metal and plastic polishing solid ointment.
There are four commonly used polishing paste.
(1) white polishing paste. Made with lime and stearic acid, fatty acid, paint grease, tallow, suet, Ash etc., for the polishing of nickel, copper, aluminum, and bakelite.
(2) the yellow polishing paste. Feldspar powder and paint lipid, fatty acid, rosin, massicot, lime, soil Pink, etc. with, for the polishing of copper, iron, aluminum, and bakelite.
(3) green polishing paste. Tie fatty acids and Yanghuagelv, made for polishing of stainless steel and chrome.
(4) red polishing paste. Made with fatty acids, ash, iron oxide red, used for metal plating before polishing and polishing gold, silver back light, etc..