Wear performance of diamond tools during sawing with reciprocating swing frame saw

The kinematics analysis of the reciprocating swing frame sawing machine was carried out, and the theoretical cutting depth and scratching mechanics models of diamond grain were established. Furthermore, sawing test and cutting force test were fulfilled on a reciprocating swing frame saw prototype to verify the interaction characteristics between segment and stone and explore the wear characteristics of diamond tools. It was indicated from the results that the segments in the synchronous contact region initially participated in sawing once at a reversal point in 1 cycle, and then scratched and removed the accumulated stone debris before cutting into the stone and after separating from the stone. The macroscopic crushed and pull-out diamond grains on segment surface in the synchronous contact region were relatively common, while the ratio of the failed diamonds in the sequential contact region decreased significantly and changed positively with the theoretical sawing depth. The diamond exposure in the synchronous contact region was associated with the scratching length of the diamond at the corresponding side, while the diamond exposure in the sequential contact region was relevant to its theoretical sawing depth in the corresponding stroke. Trailing tails shaped like those generated in circular sawing were developed on the side of diamond grain with less wear on the matrix bond in sawing process with reciprocating swing frame saw. The radial residual height of the segments in the synchronous contact region was significantly lower than that in the sequential contact region.