| 摘要 |
A grinding apparatus and method in which at least two grinding wheels are coaxially and rotatably supported on a common spindle and are juxtaposed with a worktable for a workpiece. A pulse motor on either the worktable or the spindle displaces the wheels and the workpiece relatively along a Z-axis orthogonal to the spindle axis and another pulse motor effects relative displacement of the wheels and worktable along an X-axis which is normal to the Z-axis and is codirectional with the spindle axis. Yet another motor serves to relatively displace the wheels and worktable along a Y-axis which is normal both to the Z-axis and to the X-axis while a numerical controller applies control-signal pulses to the Z-axis displacement and the X-axis displacement motors.
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