GRINDING WHEEL LOCKING STRUCTURE TO ROTARY MAIN SPINDLE

摘要

PROBLEM TO BE SOLVED: To prevent a core member of a grinding wheel from being deformed by bolt clamping force when the grinding wheel is locked to one end of a main spindle. SOLUTION: In a grinding wheel locking structure where the grinding wheel 31 is locked to the end face of a main spindle 21 by means of bolts 52 in a state where a bore of a core member 32 of a grinding wheel 31 is fitted on a cylindrical boss 41 of the main spindle 21, a liner 45 is integrally fitted in the bore of the core member 32 to prevent the deformation of the core member due to clamping of the bolts 52. A thermal expansion compensating member 51 or 50 is put at least on one side of the grinding wheel 31 to compensate for the difference in thermal expansion of the bolts 52 and the core material 32, and to prevent stress-strain caused by the difference in thermal expansion from acting on the core material 32.