Centering device
AssigneeDainichi Kinzoku Kogyo Co., Ltd.
InventorSaburo Ushiro
Life of this patent
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Abstract
A centering device in a machine tool having a chuck for clamping a work includes a clamp device for clamping and centering the work at a different position with respect to the chuck. The clamp device has an actuator driven by a pressure medium and a holder operable by the actuator for clamping the work with a pressure corresponding to the pressure of the pressure medium and for releasing the work. A control device is provided for controlling the pressure of the pressure medium to a value which is appropriate to center the work by the clamp device and which is previously determined according to a diameter of the work to be clamped.
Claims4
A centering device in a machine tool having a chuck for clamping a work, comprising:
- a plurality of clamp devices for clamping and centering the work at different positions with respect to the chuck and with respect to each other in a longitudinal direction of the work, each of said clamp devices including an actuator driven by a pressure medium and a holder operable by said actuator for clamping the work with a pressure corresponding to the pressure of said pressure medium and for releasing the work;
- and
- a control device for controlling the pressure of said pressure medium of each of said clamp devices to a value which is previously determined to appropriately center the work to be clamped according to a diameter of the work and compensated for tolerances including manufacturing tolerance and assembling tolerance of each of said clamp devices.
Dependencies are inferred from the claim text.