L. Schuler Gmbh

Wolfram Buchler

Franz Schneider

Eugen Waller

Burkhard Schumann

Heinz Weber

Rolf Kellenbenz

A drive arrangement for a mechanically driven press with the press including at least one drive shaft mounted in a press frame and at least one eccentric or crank arranged on the drive shaft with a clutch being operatively connected to the drive shaft for permitting a press stroke operation upon engagement of the clutch. At least two hydraulic brakes are provided for braking the press between press strokes and a two system hydraulic circuit is provided for controlling the operation of the clutch and the at least two brakes.

Mechanical press drive arrangement

A press having mechanical drive elements acting on the ram through at least one pressure cushion serving as a hydraulic overload safety device, at least one cylinder-piston unit operating under the effect of a compressed fluid for counterbalancing the weight of the ram associated with an upper die of the press, and a control system for adjusting fluid pressure in the cylinder-piston unit to a value for counterbalancing the weight. The control system includes a pressure relief valve and a pressure meter associated with the pressure cushion wherein the meter detects the pressure in the pressure cushion in a measuring range including a predetermined value. An actuating member serves for initiating a counterbalancing operation which includes operation of the pressure relief valve and control of supply and discharge valves for supplying and discharging fluid to and/or from the cylinder-piston unit.

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Donzdorf, Germany

Wolfram Buchler