Exemplary accessories for use with woodworking supports of woodworking devices may include a first number of locks actuatable by a second number of actuators, the second number being less than the first number. An exemplary actuator is a cam type actuator.

A high-precision tensioning device is provided. The high-precision tensioning device is composed of a stepping motor, an encoder, a harmonic reducer, a rotary table, connecting rods, contacts, force sensors, a rotary table connecting piece, a gasket, a nut, bolts, a set screw, a shell and an end cover. The tensioning device provided by the disclosure can achieve closed-loop control on a tensioning force in order to improve the tensioning precision of the tensioning device; and as long as machining and assembling errors meet design requirements, stable synchronous tensioning of three contacts can be ensured, and the location precision of a hub is improved.

A clamping device for clamping an insertion nipple (7), including a clamping element (11) which can be axially moved, by a drive motor (9) via a screw mechanism (13), between an open position in which the insertion nipple (7) can be introduced into a receiving opening (8) of the clamping device and withdrawn from the same, and a clamping position in which the insertion nipple (7) introduced into the receiving opening (8) is retained in the same. The clamping device has an impulse unit (12) with a rotary part (40) which is mechanically coupled to the rotor (31) of the drive motor (9), and by which, for each revolution, a rotary impulse can be transmitted, at least once, to an impulse-receiving part (41) of the impulse unit (12) via the screw mechanism (13), in order to axially move the clamping element (11).

A pipe end clamping apparatus includes a first pneumatic cylinder, a second pneumatic cylinder and a clamping component. The first pneumatic cylinder includes a first piston in the first cylinder body, first and second air chambers corresponding to the first and second air inlets respectively, and a first plunger rod installed to the first piston. The second pneumatic cylinder includes a second piston in the second cylinder body, third and fourth air chambers corresponding to the third and fourth air inlets respectively, and, a second plunger rod installed to the second piston. The clamping component has a clamping seat and a clamping component in the housing and pumps air into different air inlets of the first or second pneumatic cylinder to control the first or second piston to displace in the first and second cylinder bodies, so as to control clamping the clamping component or loosening the pipe.

A pipe end clamping apparatus includes a first pneumatic cylinder, a second pneumatic cylinder and a clamping component. The first pneumatic cylinder includes a first piston in the first cylinder body, first and second air chambers corresponding to the first and second air inlets respectively, and a first plunger rod installed to the first piston. The second pneumatic cylinder includes a second piston in the second cylinder body, third and fourth air chambers corresponding to the third and fourth air inlets respectively, and, a second plunger rod installed to the second piston. The clamping component has a clamping seat and a clamping component in the housing and pumps air into different air inlets of the first or second pneumatic cylinder to control the first or second piston to displace in the first and second cylinder bodies, so as to control clamping the clamping component or loosening the pipe.

A high-precision tensioning device is provided. The high-precision tensioning device is composed of a stepping motor, an encoder, a harmonic reducer, a rotary table, connecting rods, contacts, force sensors, a rotary table connecting piece, a gasket, a nut, bolts, a set screw, a shell and an end cover. The tensioning device provided by the disclosure can achieve closed-loop control on a tensioning force in order to improve the tensioning precision of the tensioning device; and as long as machining and assembling errors meet design requirements, stable synchronous tensioning of three contacts can be ensured, and the location precision of a hub is improved.

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 present application provides a stationary fixture for machining of an aluminum alloy wheel, includes a machine tool base, first supports, end covers, a first power shaft, bearings, a second end cover, and the like, wherein the first support and a second support are mounted on the machine tool base, the first power shaft is mounted inside a bearing seat, a group of bearings is mounted between the bearing seat and the first power shaft, a nut is mounted at the left end of each bearing to position the inner ring of the bearing, the first end cover is mounted on the left side of the bearing seat at the upper end of the first support by screws, the first sealing ring is mounted between the first end cover and the first power shaft, and the second end cover is fixed to the right side of the bearing seat.

The present application provides a stationary fixture for machining of an aluminum alloy wheel, includes a machine tool base, first supports, end covers, a first power shaft, bearings, a second end cover, and the like, wherein the first support and a second support are mounted on the machine tool base, the first power shaft is mounted inside a bearing seat, a group of bearings is mounted between the bearing seat and the first power shaft, a nut is mounted at the left end of each bearing to position the inner ring of the bearing, the first end cover is mounted on the left side of the bearing seat at the upper end of the first support by screws, the first sealing ring is mounted between the first end cover and the first power shaft, and the second end cover is fixed to the right side of the bearing seat.

Exemplary accessories for use with woodworking supports of woodworking devices may include a first number of locks actuatable by a second number of actuators, the second number being less than the first number. An exemplary actuator is a cam type actuator.