Patent ID: 8172489

Claim:
A machine tool for machining workpieces, said machine tool comprising: a workpiece support for mounting the workpiece, a tool holder, which is adapted to be moved at least along one axis, for holding a tool for machining the workpiece, and workpiece holding units for fixing and centering the workpiece during the machining, wherein the workpiece holding units are arranged outside the workpiece support surface of the workpiece support, which is, in the mounted state, covered by the workpiece, wherein each workpiece holding unit comprises a holding element for fixing and centering the workpiece, wherein the holding elements are adapted to be moved, substantially parallel to the workpiece support surface, in the direction of the workpiece, in particular in the direction of a central workpiece axis, which runs perpendicular to the workpiece support surface, and wherein the holding elements comprise a clamping surface that is arranged obliquely in relation to the workpiece support surface and that is, in the mounted state, pressed against the workpiece for fixing and centering the workpiece to be machined, thereby exerting a pressure both in the direction of the workpiece support surface and in the direction of the central workpiece axis.