Force and segment wear in various granites cutting by diamond frame saw

Abstract

Influences of cutting parameters (feed rate, cutting length, and flywheel rotation speed) and stone properties (such as quartz content, uniaxial compression strength, and bending strength) on forces in various granites cutting by diamond frame saw (diamond gang saw) were studied. Feed rate ranks first in governing cutting force compared with flywheel rotation speed and cutting length. Uniaxial compression strength affects cutting forces most compared with other stone properties. The mathematical models can predict cutting forces for manufacturers and users, as well as provide a theoretical basis for improvement and optimization of stone sawing machines. Matrix tail can form during half-cycle sawing mode, which can improve the holding force of the bond to diamonds. Segments have better sawing conditions, and the main wear mode of diamond grits are whole and microfractured crystal. Slab productivity represents a 13–21 % increase, while geometrical deviation of the slab is less than 1.5 mm/m, thus reducing subsequent processing cost, such as polishing stage.