Optima Spanntechnik Gmbh

Firma Optima-Spanntechnik Gmbh

Bernhard Stahl

Horst Bohm

A clamping device which is arranged to clamp a workpiece to a table or stand, and which does not obstruct the clamping region of the table or stand, has a fluid pressure-loaded clamping piston slidably mounted in a main housing with toggle levers on either side thereof bearing against oppositely situated saddle bearings at the sides of the housing. The toggle levers are moved by the clamping piston between an inclined position and an extended position and load a clamping or pulling anchor which is mounted on the housing. The clamping or pulling anchor is pivotally mounted on a clamping lever so that it can swing through a maximum of 180.degree. from a clamping position into a release position in which it is well clear of the workpiece. The anchor is fitted onto a bearing pin, which is disposed in an end, which projects from the housing, of the clamping lever which is pivotally mounted in the housing. The opposite end of the clamping lever rests against one of the saddle bearings of the toggle levers and is guided slidably in the housing.

Clamping device

A quick-acting clamping device for clamping tools or workpieces in machine tools comprises a piston which is slidable transversely to the clamping direction and which acts on a toggle mechanism which in turn moves a clamping piece. A pressure plate upon which the toggle mechanism acts is displaceable in the clamping direction in a housing which contains the transverse piston. The fluid under pressure which acts on the transverse piston to activate the toggle mechanism also acts directly on the pressure plate to assist in clamping. Because of the assisting force produced by the pressure plate it is possible for the transverse piston to move the members of the toggle mechanism from starting positions in which they lie at large angles to the clamping direction, that is with a big angular displacement from their dead-center position, in which they initially exert only a small force on the clamping piece. Because of this large angular displacement of the members of the toggle mechanism, the toggle mechanism by itself can produce a large linear movement of the clamping piece.

Quick-acting clamping devices

A bracing device for machine tools which is formed with a compensation unit having a housing with threaded pins arranged in the housing rotatably displaceable relative thereto with a hydraulic rotary drive being provided for actuating the threaded pins.

Growing community of inventors

Neunkirchen, Germany

Bernhard Stahl