WAYS OF REDUCING THE TEMPERATURE OF THE DIAMOND CUTTING WHEEL WHEN CUTING STONE BUILDING MATERIALS

Abstract

During the repair and restoration of buildings, ceramic tiles and blocks of Al₂O₃ and ZrO₂ are often cut. At present diamond abrasive disks are widely used for these purposes. The cutting process is accompanied by considerable heat release and heating of the diamond disk. At a temperature of about 600º, the tensile strength of a disc is reduced by a factor of 2 and graphitization of diamond grains occurs. Thus, when cutting stone and building materials with a diamond circle, the disk heating temperature should not exceed 600 ° C. In the work, mathematical modeling of the heating of a diamond cutting disk on a metal base was performed while cutting ceramic materials to determine the time of continuous operation to a critical temperature of 600 ° C. The simulation results presented in the graphs showed the dependence of the heating temperature of the disk on the diameter of the latter, the speed of rotation, the minute feed, the grain size and the thickness of the disk . It is shown that by selecting appropriate process characteristics the time of continuous operation can be of the order of 10 - 12 min without the use of forced cooling.