Disclosed is a workpiece receptacle, in particular for an ultrasonic welding device, that has a receiving element for receiving a workpiece. The receiving element can be moved in relation to a base element. A bearing device is disposed between the receiving element and the base element for this purpose. The bearing device has spherical surfaces lying opposite one another.

A fixture includes a base with a bottom and a rim, a clamp with an exterior in a shape of a portion of a clamp sphere and a component space that is wholly within the clamp sphere, wherein the clamp is positioned such that the clamp exterior is in contact with the rim.

Disclosed is a workpiece receptacle, in particular for an ultrasonic welding device, that has a receiving element for receiving a workpiece. The receiving element can be moved in relation to a base element. A bearing device disposed between the receiving element and the base element for this purpose. The bearing device has spherical surfaces lying opposite one another.

A fixture includes a base with a bottom and a rim, a clamp with an exterior in a shape of a portion of a clamp sphere and a component space that is wholly within the clamp sphere, wherein the clamp is positioned such that the clamp exterior is in contact with the rim.

Provided is a device that prevents a workpiece from sticking to a clamp part and moving with the clamp part to a position deviating from a predetermined position. The device for holding the workpiece includes: a seat on which the workpiece is seated; a clamper that is movable with respect to the seat; a clamp part that is movably supported by the clamper and is configured to hold the workpiece at a clamp position with respect to the clamper in such a manner that the clamp part is pressed against the workpiece by an operation of the clamper so that the workpiece is held between the clamp part and the seat; and a biasing part that is configured to bias the clamp part to move the clamp part from the clamp position when the clamp part is at the clamp position.

Clamping device comprising a first connection body having a locking portion slidably inserted in a guide seat, which is obtained in a second connection body, so that the first and the second connection body are slidably associated to translate one with respect to the other in a plurality of adjustment positions. The locking portion is deformable between an expanded configuration, in which it exerts a pressure against a lateral surface delimiting the guide seat, and an undeformed configuration, in which it does not exert pressure allowing the first connection body to slide. A locking system is provided to act on the locking portion to deform it between the expanded and the undeformed configuration. Said locking system is moved by an actuating piston slidably inserted in a guide chamber obtained in the first connection body.