Eumuco Aktiengesellschaft Fur Maschinenbau

Werner Schiller

Otto Herndl

Janos Szakacsi

Manfred Benedix

A multi-ram forging assembly has a piston-cylinder unit for driving each ram carrying a forging tool wherein at least two diametrically opposed forging unit simultaneously act on a workpiece. Each piston-cylinder unit comprises a pressurized inlet chamber for containing a hydraulic pressure fluid at a predetermined pressure behind a piston movably disposed in the cylinder. The piston includes a front-end ram carrying a forging tool. A valve including a valve seat member is disposed on the piston at a rear side opposite to the front-end ram. A valve cone cooperates with the valve seat member to provide a closed position and an open position for the valve. An actuator is connected to move the valve cone between the closed and open positions. The piston includes a passage bore extending from the valve seat member to a pressure fluid discharge chamber connected to a hydraulic pressure fluid reservoir container providing a pressureless discharge of the pressure fluid medium. A piston return pressure chamber is located within the cylinder to cause the return of the piston under the action of a pressure fluid having a preselected predetermined pressure maintained within the piston return pressure chamber.

Multi-ram forging assembly

The invention is a shifting mechanism for a screw press. The screw press includes a shifting coupling for the press spindle, a drive mechanism for continuously rotating a flywheel, a coupling mechanism operatively located between the flywheel and the shifting mechanism which is dependent upon angular deceleration and is controlled for the purpose of actuating the coupling mechanism. The shifting mechanism comprises a hydraulically actuatable shifting coupling. A hydraulically prestressed valve is located between the reaction mass and a rotating coupling portion that is connected to the flywheel. The coupling mechanism is controlled through the use of a hydraulic line and the prestressed valve is affected by the hydraulic pressure medium in that line acting upon the coupling mechanism.

Growing community of inventors

Bergisch-Gladbach, Germany

Werner Schiller