INFLUENCE OF POLISHING MODES FOR THE RO UGHNESS OF DIAMOND COA TED PARTS
The results of experimental studies of the process of mechanochemical polishing of a polycrystalline diamond PVD coating ofparts such as bodies of revolution are considered. A new polishing method and a device for polishing a polycrystalline diamond coating ofparts such as bodies of revolution with a tool in the form of a metal brush are proposed. Cup metal brush rotates around its axis, and the workpiece rotates and moves along the axis of rotation. Under the impact of the bristles of the brush, the most protruding microroughnesses of the polycrystalline diamond surface are chipped off, and then the tops of small microroughnesses are subjected to the thermochemical process of graphitization. As a result, a roughness corresponding to a polished surface is achieved in a short time. The results of experimental studies are presented, mathematical and graphical dependencies are constructed that describe the influence ofprocess factors on the efficiency of the polishing process. It is shown that the most significant influence on the surface roughness is exerted by the rotation speed and the transverse feed of the tool, while the workpiece rotation speed has a lesser effect. The results of the experimental studies performed can be used in the tool production of diamond-coated cutting tools, as well as in the production of microelectronic elements, power optics of lasers with high radiation power, parts of fuel equipment for internal combustion engines, surgical scalpels, razors, bearings, various tools and many other products. operating under conditions of increased friction and wear.