Control arrangement for regulating the speed of a pressure cylinder
AssigneeL. Schuler GmbH
InventorSiegfried Baur
Life of this patent
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Abstract
A control arrangement for regulating the speed of a pressure cylinder increases the controllable flow volume through a proportional-action (control) valve, while avoiding a larger valve or two valves of the same type that must be connected in parallel. A control valve is used which has at least two flow paths connected in parallel. At least one controllable valve is connected in series with a first of the flow paths for the blocking or release of the delivery pipe. The connected first flow path and the controllable valve are connected in parallel to the second flow path.
Claims3
A control arrangement for regulating the speed of a pressure cylinder in a drawing apparatus of a drawing stage of a press, comprising:
- a control valve in a delivery pipe leading to the pressure cylinder, the control valve being adjustable in its flow cross section, the control valve having at least first and second flow paths connected in parallel;
- at least one controllable valve connected in series to the first flow path, for blocking or releasing of the first flow path, the thus controllable first flow path and the at least one controllable valve being connected in parallel to the second flow path.
Dependencies are inferred from the claim text.