Abstract: A method for the surface finishing of workpieces moves the workpiece, including rotating about at least one axis, relative to a bed of a granular grinding and/or polishing material. The workpiece is accelerated to different speeds of rotation in relation to the bed of the granular grinding/polishing material. The workpiece or a container containing the bed of granular grinding/polishing material to be accelerated in periodic cycles of at most 5 sec between speeds of rotation and a second speed of rotation and/or to be rotated during continual acceleration at continually different speeds of rotation. A device for carrying out the method, such as a drag- or dip-finishing machine, includes a control device to impose speed of rotation profiles of the aforementioned type on a rotary drive workpiece holders, on which the workpieces can be clamped, or on a container containing the bed of granular material during the operation.

Abstract: A method for the surface finishing of workpieces moves the workpiece, including rotating about at least one axis, relative to a bed of a granular grinding and/or polishing material. The workpiece is accelerated to different speeds of rotation in relation to the bed of the granular grinding/polishing material. The workpiece or a container containing the bed of granular grinding/polishing material to be accelerated in periodic cycles of at most 5 sec between speeds of rotation and a second speed of rotation and/or to be rotated during continual acceleration at continually different speeds of rotation. A device for carrying out the method, such as a drag- or dip-finishing machine, includes a control device to impose speed of rotation profiles of the aforementioned type on a rotary drive workpiece holders, on which the workpieces can be clamped, or on a container containing the bed of granular material during the operation.

Abstract: An apparatus for surface finishing workpieces has a workpiece holder, on which a chucking device for releasably fixing the workpieces to be machined is secured, and a container arranged underneath the workpiece holder in order to receive grinding and/or polishing granules, which can be moved relative to the workpiece holder. A chucking device has a chuck, which is designed for at least partially positive holding of the workpiece for conjoint rotation. The chucking device furthermore has a vacuum duct, which can be connected to a vacuum generator and which opens into the chuck in order to hold the workpiece in such a way that it is fixed axially by the application of a vacuum to the vacuum duct. The chuck of the chucking device is arranged on an adapter piece, which can be fixed releasably on a supporting part of the chucking device.

Abstract: In a grinding machine comprising a stationary wall part and a plate part which rotates about an axis of rotation, between which a gap is formed, the gap is limited from above by a ceramic part and from below by an elastic part.