Kurilovich V. Improving the quality of the machined surfaces of natural stone tool of diamond-polymer fibers

The thesis is devoted to the actual scientific and technical problems to improve the quality of machined surfaces of products from a natural stone finish with diamond-abrasive finish, which is achieved through the development of the tool with diamond-polymer fibers (DPF), which prevents the formation of conglomerates abrasive grains in the working layer and decreases defects treated surfaces. Improving the quality of machined surfaces is ensured through the use of a new design tool working layer, evenly worn during processing. Found that to improve the quality of machined surfaces, Natural stone by eliminating conglomerates diamond grains in the tool necessary elements of its working layer of diamond-shape polymer fiber diameter is defined by the inequality dmax <df <2dmin (dmax and dmin - the largest and the smallest grain size main fraction of diamond powder, respectively). This method of calibration diamond-polymer fiber diameter, which is in the process of pulling the fibers from the melt speed bobbins wound device which linearly decreases. Formation of the components of the layer of diamond-polymer and abrasive polymeric fibers advisable to pressing at a pressure of P = 0,7-0,8 MPa and temperature of heating the mold T = 270-275 °C. The design tool with DPF that provides even wear his character at the finish treatment of stone. Shown that at the finish processing of products made of natural stone designed tool with diamond-polymer fibers of treatment quality exceed those tools analogues: a roughness of Ra parameter is reduced by 0,15-0,17 mkm, and reflecting the ability Ko (%) increases in 0,3-0,4. Based on the results of the tests and their pilot check recommendations on the practical application of the results.