Makushina

The article covers potential ratios of abrasive powder, pores and couplant in the composite material of an abrasive tool. Analytical relations for calculating maximum fillings by a heterogeneous phase were obtained. The optimal composite structure is the structure which has a maximum proportion of the abrasive material in the tool. It is shown that for abrasive grain the size of which is less than 30 microns an optimal size of pores is 0,5 mm. Maximum volume filling of abrasive composites at continuous distribution of particles of heterogeneous phases according to sizes was calculated. It is shown that the maximum content of abrasive in the tool volume accounts for 15-16%. The authors describe an empirically defined criterion of tool formability characterizing the binder’s ability to keep abrasive grains.