An actuation unit includes an actuating arm pivotable between an open and closed position; a pneumatic cylinder comprising a stem movable linearly along a cylinder axis and configured to control pivoting of the actuating arm; and a closing device that includes a braking unit configured to brake movement of the actuating arm having a surface portion configured to come into contact with at least one braking assembly. The braking assembly is locked against rotation and axially movable between a non-braking and braking configuration. The surface portion is in a non-orthogonal arrangement with respect to the cylinder axis and the braking assembly includes a plurality of rollers retained in the braking assembly with clearance at least with respect to a radial movement thereof, the rollers being able to assume a first radial configuration not in contact with the surface portion and a second radial configuration in contact with the surface portion.

A power clamp includes a body. A piston assembly is coupled with the body. The piston assembly includes an actuation mechanism and a movable piston rod. A linkage is housed in the body. The linkage is movably coupled with the piston rod. A plunger is movably coupled with the linkage. A clamp hook is coupled with the plunger for clamping a workpiece. The linkage moves the clamp hook between a release and clamping position.

The apparatus (1) for clamping workpieces on machine tools comprises: a basic frame (2) fixable to a machine tool (M) for machining a workpiece (P); a clamping unit (3); a hydraulic actuator (22, 23) comprising a first chamber (26) which can be supplied with a first pressurized hydraulic fluid and is connectable to a first sensing device (27) for sensing the pressure of the first hydraulic fluid; a sensing channel (15) which can be supplied with pressurized air and which is connectable to a sensing sensor (16) for sensing the pressure of the air;
wherein the first sensing device (27) and the sensing sensor (16) are connectable to a control system adapted to authorize the machining of the workpiece (P) when the pressure of the first hydraulic fluid and the pressure of the air are simultaneously higher than their respective threshold values.

A closing device for a mold group with two half-molds extends along a main axis and has a device body mountable to one of the two half-molds, and a closing group having a closing element rotatable about a rotation axis between a closing position, in which the two half-molds are lockable and an opening position, in which the two half-molds are releasable. A movement group housed in the device body and engaged with the closing group to rotationally move the closing element has a stem movable along the main axis and transmission members for transforming linear motion of the stem into rotatory motion of the closing element. A command group has a command plate engaged with one command end of the stem and a metal sealing bellows engaged with the command plate. A position of the metal sealing bellows corresponds to an axial position of the command plate and of the stem.

A clamping device has an actuator that moves linearly and is actuated by a drive. A pivoting clamping element is operatively connected, via a toggle lever mechanism, with the actuator. The toggle lever mechanism includes a drive-side adapter and a hand lever-side adapter. The drive side adapter and hand lever side adapter can be adjusted relative to one another to define an opening angle of the clamping element. One of the adapters has a profiled bar extending in a direction of actuation. The other adapter has an insertion region to accommodate the bar. A fixing element is provided in one of the adaptors to define the location of the adapters relative to one another. The fixing element can be clamped against the profiled bar and also against an insertion region.

An embedded element pulling apparatus, the apparatus comprises a pair of linear guides separated by a width, each linear guide having a length and an inner guide surface, the inner guide surface angled to form a closing ramp at the grasping end. A jaw is paired with each linear guide; each jaw is engaged to follow along the inner guide surface. Each jaw may have an interchangeable grasping tooth. A lock assembly is integrated to lock and unlock the jaws. A carriage cooperatively couples the jaws and the lock assembly. A positioning actuator engages with the carriage to position the jaws along the length of the linear guides and a drive actuator engages with the carriage to close the jaws, pull the embedded element, and open the jaws. A motive device may drive the positioning actuator and drive actuator.

In a clamping device, a detection mechanism detects a state of clamping/unclamping and includes: a detected body that moves together with a piston and a piston rod; a circuit board disposed to face the detected body and capable of detecting the position of the detected body; and an indicator lamp that is connected to the circuit board and is lit/extinguished depending on the state of clamping/unclamping. By pressing a setting button provided on the detection mechanism when the rotation angle of the arm is changed, the second detection position of the circuit board for detecting the unclamped state is changed, making it possible to detect the detected body at a newly set detection position.

A clamping device has a clamping arm mounted pivotable in a housing of the clamping device, a first locking means pivotable corresponding to the pivoting movement of the clamping arm, and a second locking means arranged in the pivot path of the first locking means and mounted in the housing, wherein the two locking means interact in an end position of the clamping arm. The first locking means, in the region of the end remote from the pivot axis of the first locking means, on the side facing the second locking means, has a recess defined at the side by two projections, wherein the second locking means contacts the projections when the clamping arm pivots into the end position thereof and is inserted into the recess in the end position, wherein the first locking means has a first portion which receives the first projection, and a second portion which receives the second projection, wherein the two portions, with the second locking means acting upon the two projections, are movable toward one another against a spring force with the spacing between the projections increasing.

A clamping device has, comprising a drive (1) with a linearly movable actuator (2). A position monitoring device (3) detects the position of the actuator (2). A pivot member (4) is operatively connected to the actuator (2) and is rotatably mounted about an axis of rotation (8). The axis of rotation (8) is stationary with respect to the drive (1). The position monitoring device (3), for detecting the position of the actuator (2), is designed to cooperate with the pivot member (4).

A clamping device (2) includes: a turning-supporting member (26) formed so as to support a housing (3) which turns when a clamping position is set, the housing (3) turning toward a desired turning angle position about an axis of the housing (3) while maintaining the axis at a constant position; and a bolt (46) which fixes the housing (3) to the turning-supporting member (26) at the desired turning angle position.