Abstract: A device that estimates a life of a clamping mechanism clamping rotation of a rotary table includes a machine learning device. The machine learning device observes operating state data of the rotary table and operation history data of the rotary table as a state variable indicative of a current state of an environment, and acquires life data indicative of the life of the clamping mechanism as label data. In addition, the device uses the state variable that has been observed and the label data that has been acquired and learns the operating state data and the operation history data and the life data in association with each other.

Abstract: In a method of controlling a rotary table device, a clamp mechanism drive unit is controlled to unclamp a brake disk. Thereafter, a pressure of working fluid supplied to an unclamp fluid chamber is decreased, and a motor drive unit is controlled to rotate a motor. Then, the abrasion quantity of the piston and the clamp member is calculated based on a reference pressure and a pressure when the load torque of a spindle exceeded a reference load torque.

Abstract: A device that estimates a life of a clamping mechanism clamping rotation of a rotary table includes a machine learning device. The machine learning device observes operating state data of the rotary table and operation history data of the rotary table as a state variable indicative of a current state of an environment, and acquires life data indicative of the life of the clamping mechanism as label data. In addition, the device uses the state variable that has been observed and the label data that has been acquired and learns the operating state data and the operation history data and the life data in association with each other.

Abstract: In a method of controlling a rotary table device, a clamp mechanism drive unit is controlled to unclamp a brake disk. Thereafter, a pressure of working fluid supplied to an unclamp fluid chamber is decreased, and a motor drive unit is controlled to rotate a motor. Then, the abrasion quantity of the piston and the clamp member is calculated based on a reference pressure and a pressure when the load torque of a spindle exceeded a reference load torque.

Abstract: A clamping mechanism of rotation table device includes a shaft fixing a workpiece to an end portion thereof, a brake disk fixed to the shaft, and a clamping mechanism clamping or unclamping the brake disk by driving a piston. The clamping mechanism includes a plate spring fixed to a rear plate fixed to a casing and a piston and urging the piston in a clamping direction at all times by an elastic deformation restoring force and the plate spring is fixed to the rear plate or the piston through an annular plate.

Abstract: A clamping mechanism of rotation table device includes a shaft fixing a workpiece to an end portion thereof, a brake disk fixed to the shaft, and a clamping mechanism clamping or unclamping the brake disk by driving a piston. The clamping mechanism includes a plate spring fixed to a rear plate fixed to a casing and a piston and urging the piston in a clamping direction at all times by an elastic deformation restoring force and the plate spring is fixed to the rear plate or the piston through an annular plate.

Abstract: A rotary table, which is provided with a rotating shaft rotatably disposed in a casing and a clamping mechanism configured to disable the rotating shaft from rotating, is designed so that another clamping mechanism, in addition to the first clamping mechanism, can be connected to the rotating shaft, whereby a clamping torque twice that of a rotary table with a single clamping mechanism can be produced.