A fixing device for securing a thin-walled component according to an embodiment includes: a support; a pressing portion provided on the support and including: a pressure generator located at a center of the support; and a plurality of pressure transmitters arranged around the pressure generator and extending in a radial direction of the thin-walled component; and a plurality of elastic members connected to the plurality of pressure transmitters, wherein the plurality of pressure transmitters are configured to move the plurality of elastic members in the radial direction.

A machine tool includes: a turret configured to hold a tool through a clamp mechanism; a workpiece main spindle device configured to rotatably hold a workpiece; a switching unit configured to change a clamp state of the clamp mechanism by using rotation torque of the workpiece main spindle device; and an in-machine robot configured to move the switching unit. The clamp mechanism includes a torque input hole to which rotation torque is applied to change the clamp state. The switching unit includes an input shaft coupled with the workpiece main spindle device, an output shaft coupled with the torque input hole of the clamp mechanism and configured to output torque to the torque input hole, and a transmission mechanism configured to transfer, to the output shaft, the rotation torque of the workpiece main spindle device input through the input shaft.

A machine tool includes: a turret configured to hold a tool through a clamp mechanism; a workpiece main spindle device configured to rotatably hold a workpiece; a switching unit configured to change a clamp state of the clamp mechanism by using rotation torque of the workpiece main spindle device; and an in-machine robot configured to move the switching unit. The clamp mechanism includes a torque input hole to which rotation torque is applied to change the clamp state. The switching unit includes an input shaft coupled with the workpiece main spindle device, an output shaft coupled with the torque input hole of the clamp mechanism and configured to output torque to the torque input hole, and a transmission mechanism configured to transfer, to the output shaft, the rotation torque of the workpiece main spindle device input through the input shaft.

A device for clamping a workpiece has a receiving head in a housing connected to a rotary drive with a rigid drive connection between a drive motor and the receiving head, radially adjustable clamping jaws connected to a clamping drive externally clamping the workpiece, and linear drives displacing the clamping jaws and forming the clamping drive driven jointly by a gear transmission with a central gear coaxial to the drive shaft of the receiving head by a separate drive motor. The central gear can be driven synchronously with the receiving head in the clamping position of the clamping jaws, and the rotary drive for the central gear comprises a rigid drive connection between its drive motor and the central gear or a superimposed gear comprising two input shafts drive-connected to the drive motor for the rotary drive of the receiving head and to the drive motor for the central gear.

A method for cutting an inner circumferential surface of a rotating hollow cylindrical workpiece includes: holding the workpiece with a chucking device such that a side surface of the workpiece on a first side in an axial direction of the workpiece is in contact with a contact surface of the chucking device; setting an intersection angle between a rotational center line of the workpiece and an imaginary straight line to an angle smaller than 45 degrees, the straight line being parallel to an axis line of a button tip and intersecting with the rotational center line; and setting a feed direction of the button tip to the inner circumferential surface to a direction from a second side in the axial direction of the workpiece toward the first side in the axial direction thereof, and cutting the inner circumferential surface by use of the button tip rotating about the axis line.

An expanding collet device can selectively clamp a workpiece to a workpiece support and can include an arbor, expandable collet and threaded screw actuator. The threaded screw actuator mechanism can include a support, drawbar, socket and a pair of thrust bearings. The drawbar can be connected to the collet and can extend into the support. An outer circumferential portion of the drawbar can oppose and be spaced away from an inner circumferential portion of the support. The socket can surround the drawbar and can include external threads engaging internal threads on the support such that rotation of the socket relative to the support displaces the socket in the axial direction. The socket, support, and drawbar can be configured such that rotation of the socket relative to the support displaces the drawbar in the axial direction such that the drawbar moves the collet between the released position the clamped position.

The invention discloses a precision fixture for improving the balance precision of a wheel, comprising a chuck, a base, a servo motor, a lower pressure plate, a rubber strip, steel balls, an upper pressure plate, a mounting plate, a connecting shaft, a shaft sleeve, a hydraulic cylinder, a bearing end cover, bearings, a guard, an expanding core, expanding flaps, a flange plate, springs, pins, a flange, a connecting shaft and limiting columns. The fixture can meet the requirement for improving the balance precision of a wheel, at the same time, has the characteristics of simple structure, convenient manufacture, stable performance and precision that can meet the machining requirement, and can meet the requirements of automatic production.

The invention relates to a large-stroke tensioning device in a wheel machining process. The large-stroke tensioning device in the wheel machining process comprises a base (1), a servo motor (2), a mounting plate (3), a connecting plate (4), a shaft sleeve (5), an oil cylinder (6), a gland (7), bearings (8), a connecting shaft (9), a chassis (10), positioning pins (11), a flange plate (12), springs (13), sliding pedals (14), an expanding core (15), a protector (16) and the like. The large-stroke tensioning device can meet requirements of clamping and positioning of a wheel, and meanwhile has the characteristics of simple structure, convenience in manufacturing, stable performance and capability of meeting machining requirements on precision.

A machine tool includes: a turret configured to hold a tool through a clamp mechanism; a workpiece main spindle device configured to rotatably hold a workpiece; a switching unit configured to change a clamp state of the clamp mechanism by using rotation torque of the workpiece main spindle device; and an in-machine robot configured to move the switching unit. The clamp mechanism includes a torque input hole to which rotation torque is applied to change the clamp state. The switching unit includes an input shaft coupled with the workpiece main spindle device, an output shaft coupled with the torque input hole of the clamp mechanism and configured to output torque to the torque input hole, and a transmission mechanism configured to transfer, to the output shaft, the rotation torque of the workpiece main spindle device input through the input shaft.

The invention relates to a compensation device for the flat-compensated clamping of a workpiece, in particular a toothed workpiece or a workpiece to be toothed, carried out via a clamping device defining a clamping axis, said workpiece having an axis of rotation and abutting a contact surface of the compensation device with a flat side, wherein the workpiece axis of rotation is coaxially centered to the clamping axis when the clamping device is actuated, and any deviations arising therefrom of the abutting flat side from an orthogonality to the workpiece axis of rotation are compensated by a deflection movement carried out at the compensation device, wherein the contact surface has at least three contact areas spaced apart from one another and the deflection movement comprises an axial movement of the contact areas.