Patent ID: 7571669
Filing Date: 2009-08-11
Classification: G05B,Y10T

Abstract:
1. A noncircular shape machining apparatus that controls the movement of a tool tat is synchronized with the rotation of a workpiece to be machined into a noncircular shape, the apparatus comprising: a tool-moving mechanism that causes the tool to move rectilinearly, the tool-moving mechanism being disposed with a movable section that is capable of moving and an immovable section that is incapable of moving; first detecting means that detects displacement of the immovable section in a predetermined vector direction that causes the distance between the workpiece and the tool to change; second detecting means that acquires displacement of the workpiece held by a holding member in a predetermined vector direction that causes the distance between the workpiece and the tool to change; relative displacement calculating means that calculates, from the displacement of the immovable section and the displacement of the workpiece that have been detected, displacement between the immovable section and the workpiece as relative displacement; tool position detecting means that detects movement of the tool resulting from the tool-moving mechanism; and means that calculates the actual position of the tool with respect to the workpiece on the basis of the movement of the tool and the relative displacement.