Bespalova A. Improving the efficiency of cutting technology of stone building materials.

The dissertation is devoted to the solution of an important scientific and technical problem - increased efficiency of technology and technological development of repair materials for repair and restoration work. For the first time, mathematical models of dust formation during the abrasive cutting of solid materials for construction work were developed, the dispersed composition of dust formed, the percentage сomposition of various fractions, and the chemical composition of dust depending on the type of material being cut were determined. The concepts of mathematical modeling of the sedimentation rate of dust particles of different dispersion and the lifetime of the dust cloud were further developed. For the first time, a system has been proposed that allows you to adjust the technological process of cutting materials according to the results of mathematical modeling of the technological process. The aerodynamics of the cutting wheel during its operation were further developed and refined. The problems of the formation of the boundary layer of air during rotation are investigated, the effect of the air boundary layer on the formation of dust suspensions is studied. For the first time, mathematical models have been developed and applied to determine the safe working conditions of metal cutting diamond blades, taking into account heat transfer according to the circle-boundary-layer-environment scheme. The issues of using airborne coolant application for cutting solid building materials, the use of swirling coolant flows, in particular Rank-Hills tubes, were further developed and clarified.