Research on automatic draging-polishing of Shoushan stone

Aiming at the problems of low efficiency and poor quality of Shoushan stone surface manual polishing, the parameters of the rock forming minerals, the microhardness, the mineral particle sizes and densities of five kinds of Shoushan stones were analyzed, and the different kinds of abrasives were selected to automatically polish them with dragging-polishing machine. The results show that the dragging-polishing technology can automatically polish Shoushan stone, and the surface quality of the polished Shoushan stone is good. For Shoushan stones with more quartz, higher hardness, and moderate mineral density, which polish with walnut shell and diamond, its surface roughness R_a are 293 nm and 335 nm. For Shoushan stone, which contains a lot of mica, is low in hardness, and has a low mineral density, polished with corncob and alumina, its surface roughness R_a is 521 nm.For Shoushan stones with pure rock-forming minerals, medium hardness and densest minerals, which are polished with corncob and diamond, its surface roughness R_a are 235 and 186 nm.