Abstract
In order to investigate the grinding actions of the pored type diamond wheel with vitrified bond, the tangential grinding force was theoretically analysed in connecting with the constant-load grinding of Zr02-Y203. The influences of structure of wheel to the force were numerically presented by the three loading rates which directly relate to the constituent ratios of diamond abrasive grain, filler grain and bond. The force is deeply referred to the ploughing action of tiny tips on the ground surface. Filler grains in wheel decrease the cutting action of diamond abrasive grains and increase the frictional action between abrasive grains and workpiece. The calculated values of force are large on the grinding of Zr02-Y203 sintercd at higher temperature. The smallest values of force are on the grinding of Zr02-Y203 doped 3 mol% Y203, but the calculated values abruptly increase for the grinding of Zr02 doped 4 and 6 mol% Y203 due to their small plastic yield pressures.
