To stably hold a grinding wheel even when grinding wheel peripheral speed becomes high speed by constituting a device to directly install the grinding wheel on a grinding wheel spindle after correcting dynamic unbalance in a state of integrally connecting at least more than two pieces of the grinding wheels to each other by making them adjacent to each other.
A grinding wheel layer 16 is fastened in an outer periphery of a grinding wheel core 15 on a grinding wheel 14. A grinding wheel layer 12 is fastened in an outer periphery of a grinding wheel core 11 even on a grinding wheel 10. The grinding wheel 10 and the grinding wheel 14 are arranged so that a left side surface of an interval adjusting part 13 and a right side surface of the grinding wheel 14 make contact with each other, and they are integrally connected to each other by a plural number of bolts 17 provided on the same circumference. Before installing these connected grinding wheels 10, 14 on a grinding wheel spindle 20, an unbalanced point is detected as an angle from a standard point and unbalance quantity by a balance measuring device, and dynamic balance is corrected by chipping a part of the grinding wheel cores 15, 11. Thereafter, an inner peripheral hole 18 is installed on a small diametrical part 22 of the grinding wheel spindle 20. At this time, it is installed at the same phase as at the time of dynamic balance correction.
IDO MASAHIRO
HAYASHI HIROSHI
FUKUDA EIJI
NAGANO HIDEKI
YAMAGUCHI TOMOHITO
