| 摘要 |
A precision machining apparatus and a precision machining method capable of carrying out grinding with accuracy by performing switching control, for example, on a device for rotating a grinding wheel according to grinding stages through the amount of movement and constant pressure changed stepwise. To a second pedestal 3 supporting a rotary device 6 b for rotating a grinding wheel b, an actuator 5 and a feed screw mechanism 4 constituted by at least a feed screw 41 and a nut 42 are attached. In a rough grinding stage, the movement of the rotary device 6 b and the second pedestal 3 is adjusted through a predetermined amount of movement of the nut 42 . In a super-precision grinding stage, the movement of the rotary device 6 b and the second pedestal 3 is adjusted by pressure control using stepwise a plurality of pneumatic actuators 5 a, 5 b differing in pressure performance. An attitude control device 7 is interposed between a first pedestal 2 and a rotary device 6 a for rotating an object a to be ground.
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