Experiments on rotary truing of vitreous bond diamond grinding wheels were
conducted to investigate the effects of truing speed ratio, type of diamond
in the metal bond truing disks (synthetic versus natural), and diamond gri
t size in the grinding wheel on the wear of truing disk and on the cylindri
cal grinding of zirconia. Similar to G-ratio, a new parameter called D-rati
o is defined to quantify the wear rate of the diamond truing disks. Experim
ental results show that, under the same truing condition, the truing disk w
ith blocky, low friability synthetic diamond has a higher D-ratio than the
truing disk with natural diamond. Diamond wheels trued by the disk with syn
thetic diamond also generate lower grinding force and rougher surface finis
h. High truing disk surface speed, 1.8 times higher than the surface speed
of the grinding wheel, was tested and did not show any improvement in D-rat
io. This study indicates that mu m-scale precision form truing of the vitre
ous bond diamond wheel is difficult due to excess wear of the metal bond di
amond truing disk.