1. Different processing methods for grinding and polishing
Grinding treatment refers to the precision machining of the machined surface using abrasive particles coated or embedded on a grinding tool, through the relative motion between the grinding tool and the workpiece under a certain pressure.
Polishing refers to a machining method that uses mechanical, chemical, or electrochemical processes to reduce the surface roughness of a workpiece, in order to obtain a bright and smooth surface. It is a modification process of the surface of a workpiece using polishing tools and abrasive particles or other polishing media.
2. The processing accuracy of grinding and polishing is different
Grinding can be used to process various metal and non-metal materials, with surface shapes including flat, inner and outer cylindrical and conical surfaces, convex and concave spherical surfaces, threads, tooth surfaces, and other profiles. The processing accuracy can reach IT5-01, and the surface roughness can reach Ra0.63-0.01 microns.
Polishing cannot improve the dimensional or geometric accuracy of the workpiece, but is aimed at obtaining a smooth surface or mirror gloss, and sometimes used to eliminate gloss (extinction). Usually, polishing wheels are used as polishing tools. Polishing wheels are generally made of multiple layers of canvas, felt, or leather, clamped on both sides with metal circular plates, and coated with a polishing agent uniformly mixed with micro abrasive powder and grease on the rim.