A workholder with a sleeve carried by a body and providing at least in part a circumferentially continuous fluid chamber between them and at least two circumferentially spaced apart locators carried by the body axially over the sleeve and projecting radially of the sleeve. A pressurized fluid in the chamber can change the diameter of the sleeve to move the locators generally radially relative to the body into firm engagement with a workpiece so that it is carried by the workholder. The locators may be received in part in a collar received at least in part axially over the sleeve with a portion of each locator projecting radially of the collar.

The disclosure relates to a clamping apparatus for fixing in a recess of a component and for holding a workpiece carrier against the component. The clamping apparatus includes a housing for attachment to the workpiece carrier and a clamping sleeve for insertion into the recess. A clamping mandrel is at least partially disposed inside the clamping sleeve. The clamping mandrel is movable relative to the clamping sleeve between a release position and a clamp position. When the clamping sleeve is inserted into the recess and the clamping mandrel is in the clamp position, the clamping sleeve is braced within the recess by a holding force so as to be in a clamped position. When the clamping sleeve is in the clamped position, the housing is movable relative to the clamping mandrel, which permits the housing to move the workpiece carrier into contact with the component and apply a bearing force thereagainst.

A pneumatic-type precision annular workpiece inner positioning surface clamping device, wherein a rod portion of a piston assembly (5) is inserted into a central hole of the wedge-shaped block (12), and the piston portion of the piston assembly (5) is located in a closed chamber of a cylinder body (15); a disc spring (3) is sleeved on the piston assembly (5); an air intake hole (1-1) is provided in the lower plate (1), an air vent hole (15-1) is provided at the upper portion of the cylinder body (15); and an elastic hinge block (6) is sleeved outside the wedge-shaped block (12). The pneumatic-type precision annular workpiece inner positioning surface clamping device has a simple structure, high reliability and strong adaptability.

The invention discloses an improved wheel alignment device which comprises a rack, a cylinder, a servo motor, a hollow shaft and the like. When the improved wheel alignment device is used, a stopper on a roller table centers a wheel, air enters at the lower end of a large piston and causes a long cylinder rod, a flange end cover, an expanding sleeve and the like to rise; the flange end cover is in contact with a wheel flange plate, and after the expanding sleeve is in contact with a central hole, air enters at the upper end of a small piston of a small cylinder, a short cylinder rod pulls an expanding core downwards, and the expanding sleeve clamps the central hole of the wheel; the servo motor causes the hollow shaft and the wheel to rotate by a belt pulley I and a belt pulley II, and the hollow shaft and the wheel stop rotating after a sensor finds the position of a valve hole of the wheel; at the moment, lifting cylinders cause a supporting plate to rise to a certain height through guide pillars, and a large cylinder causes the wheel to descend and the lower end surface of the wheel to fall above the supporting plate. The improved wheel alignment device can realize the alignment function before the automatic machining of wheel finish turning in use, and when the wheels with different wheel widths and different offset distances are automatically produced, programs do not need to be switched.

A truing device includes a housing and a truing mandrel (1) with a shaft (10) used to mount a circular tool having a concentric opening, in particular a grinding disc (3), and with a first bearing (11) fixed on the housing (4) and located in a first end region of the truing mandrel (1) The shaft (10) includes a hydraulic clamping device (20) having a chamber (21) containing hydraulic medium, to which a pre-clamping pressure can be applied with a preclamping element (23) The hydraulic clamping device is formed from a clamping section (22) lying above the chamber (21) in the radial direction and held in the shaft on both sides. The outer surface of the clamping section forms the clamping surface and which, when the hydraulic pressure in the chamber (21) increases, can be reversibly moved or bent outwards in the radial direction such that a radial clamping force can be exerted on the inner surface of the concentric opening of the circular tool penetrated by the clamping section (22). A method provides for mounting and removing a circular tool on the truing mandrel of a truing device of this kind.

An internal clamping arrangement having a base with a clamping mandrel that extends in a main extent direction and has a guide face and at least two clamping sleeves. The clamping sleeves are displaceable in the main extent direction and are pushed onto the guide face of the clamping mandrel from the direction of a distal end of the clamping mandrel. The clamping sleeves have a clamping portion which can be expanded by displacement, and the outside of which has a clamping face for a respective one of the workpieces. The internal clamping arrangement has at least three piston chambers which act between the base and the at least two clamping sleeves and between the clamping sleeves.

A handling unit comprises: a collet integrally having a reference part, a plurality of elastic deformation parts connected to the tip side of the reference part, finger parts respectively connected to the tip sides of the elastic deformation parts, and a driven part that receives a driving force; a housing having a cylinder structure formed on the base end side or the outer circumferential side of the collet and provided with a fluid supply port and having a collet locking part that locks the collet at a locking position; and an operation body having a driving part that imparts a driving force to the driven part, a pressure reception part that receives the pressure of a fluid supplied from the fluid supply port, and a cylinder slide contact part that makes slide contact with the internal surface of the cylinder structure.

A clamping device for clamping a workpiece to a machine spindle includes at least one clamping bush which extends around a central axis and has at least one clamping surface for the workpiece and at least one clamping body. The clamping bush on a side remote from the clamping surface at least one support surface which extends about the central axis along a helical line. On a side facing, the clamping bush comprises at least one support surface which extends about the central axis along a helical line with a predefined pitch and is inclined at an angle of inclination to a direction axial to the central axis. The clamping body includes a hydraulic chamber in the interior of the clamping body. The clamping device also includes a displacement element, and at least one pressure generator. A clamping force is generatable between the clamping bush and workpiece.

A handling unit comprises: a collet integrally having a reference part, a plurality of elastic deformation parts connected to the tip side of the reference part, finger parts respectively connected to the tip sides of the elastic deformation parts, and a driven part that receives a driving force; a housing having a cylinder structure formed on the base end side or the outer circumferential side of the collet and provided with a fluid supply port and having a collet locking part that locks the collet at a locking position; and an operation body having a driving part that imparts a driving force to the driven part, a pressure reception part that receives the pressure of a fluid supplied from the fluid supply port, and a cylinder slide contact part that makes slide contact with the internal surface of the cylinder structure.

A workholder with a sleeve carried by a body and providing at least in part a circumferentially continuous fluid chamber between them and at least two circumferentially spaced apart locators carried by the body axially over the sleeve and projecting radially of the sleeve. A pressurized fluid in the chamber can change the diameter of the sleeve to move the locators generally radially relative to the body into firm engagement with a workpiece so that it is carried by the workholder. The locators may be received in part in a collar received at least in part axially over the sleeve with a portion of each locator projecting radially of the collar.