| 摘要 |
PROBLEM TO BE SOLVED: To prevent the generation of excessive normal grinding force per unit grinding width in moving a grinding wheel backward by using a grinding wheel trued up so as to be inclined in a direction for separating from a work at the time of moving the grinding wheel backward in the oscillation of the grinding wheel for oscillation grinding. SOLUTION: In an inner surface grinder 15, a grinding wheel table 7 is oscillated in the axial direction of a grinding wheel, and a grinding wheel spindle device 5 has a grinding wheel 1, of which peripheral surface is inclined like a taper in relation to the axis of the grinding wheel, at a tip thereof, and a cross slide table 12 is moved in a direction at a right angle against the axial direction of the grinding wheel. Traverse truing is performed to the peripheral surface of the grinding wheel by a grinding wheel truing device 20, and a work support device 13 supports a work 2 freely to be inclined in the moving direction of the grinding wheel table so that the work inner diameter surface contacts with the peripheral surface of the grinding wheel. A control device 17 controls the forward and backward operation of the grinding wheel table 7 and the feeding operation of the cross slide table 12 so that the inner peripheral surface of the grinding wheel is tapered in the moving direction of the grinding wheel table 7.
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