Valve apparatus
AssigneeHydac Fluidtechnik GmbH
InventorsAxel Grigoleit, Bernhard Steinmann
Life of this patent
Estimating the term…
Abstract
A valve apparatus for setting and monitoring the clamping pressure of a clamping device (9) for workpieces to be clamped, in particular in lathes, has at least one pressure control valve (1A, 1B) for setting the clamping pressure, and has at least one pressure sensor (6A, 6B) detecting the clamping pressure. The clamping pressure is adjusted in relation to a predefinable setpoint clamping pressure. The valve apparatus can set the clamping pressure for safety and monitor it to maintain or reduce it during the machining.
Claims22
A valve apparatus for setting and monitoring a clamping pressure of a clamping device for workpieces being clamped in the clamping device, comprising:
- a clamping device connection;
- a first pressure reducing valve for adjusting fluid pressure conveyed to said clamping device connection and having a mechanical self-locking device including self-locking gearing of a positioning motor triggered by a control;
- a first pressure sensor detecting pressure of the fluid pressure conveyed to said clamping device connection for adjustment to a definable setpoint clamping pressure;
- and
- first and second directional control valves switchable independently of one another, said first directional control valve being connected in a hydraulic supply circuit between said first pressure reducing valve and said clamping device connection.
A valve apparatus for setting and monitoring a clamping pressure of a clamping device for workpieces being clamped in the clamping device, comprising:
- a clamping device connection;
- a first pressure reducing valve for adjusting fluid pressure conveyed to said clamping device connection and having a mechanical self-locking device;
- a first pressure sensor detecting pressure of the fluid pressure conveyed to said clamping device connection for adjustment to a definable setpoint clamping pressure;
- and
- first and second directional control valves switchable independently of one another, said first directional control valve being connected in a hydraulic supply circuit between said first pressure reducing valve and said clamping device connection, each of said first and second directional control valves being at least a 4/2 directional control valve and supplying fluid pressure to said clamping device connection.
A valve apparatus for setting and monitoring a clamping pressure of a clamping device for workpieces being clamped in the clamping device, comprising:
- a clamping device connection;
- a first pressure reducing valve for adjusting fluid pressure conveyed to said clamping device connection and having a mechanical self-locking device;
- a first pressure sensor detecting pressure of the fluid pressure conveyed to said clamping device connection for adjustment to a definable setpoint clamping pressure;
- first and second directional control valves switchable independently of one another, said first directional control valve being connected in a hydraulic supply circuit between said first pressure reducing valve and said clamping device connection;
- and
- a second pressure reducing valve for adjusting fluid pressure conveyed to said clamping device connection being connected in a hydraulic circuit such that said second directional control valve is between said second pressure reducing valve and said clamping device connection, said first and second pressure reducing valves being switchable independently.
A clamping apparatus for setting and monitoring a clamping pressure on workpieces, comprising:
- a clamping device;
- a first pressure reducing valve for adjusting fluid pressure conveyed to said clamping device and having a mechanical self-locking device including self-locking gearing of a positioning motor triggered by a control;
- a first pressure sensor detecting pressure of the fluid pressure conveyed to said clamping device for adjustment to a definable setpoint clamping pressure;
- and
- first and second directional control valves switchable independently of one another, said first directional control valve being connected in a hydraulic supply circuit between said first pressure reducing valve and said clamping device.
A clamping apparatus for setting and monitoring a clamping pressure on workpieces, comprising:
- a clamping device;
- a first pressure reducing valve for adjusting fluid pressure conveyed to said clamping device and having a mechanical self-locking device;
- a first pressure sensor detecting pressure of the fluid pressure conveyed to said clamping device for adjustment to a definable setpoint clamping pressure;
- and
- first and second directional control valves switchable independently of one another, said first directional control valve being connected in a hydraulic supply circuit between said first pressure reducing valve and said clamping device, each of said first and second directional control valves being at least a 4/2 directional control valve and supplying fluid pressure to said clamping device.
A clamping apparatus for setting and monitoring a clamping pressure on workpieces, comprising:
- a clamping device;
- a first pressure reducing valve for adjusting fluid pressure conveyed to said clamping device and having a mechanical self-locking device;
- a first pressure sensor detecting pressure of the fluid pressure conveyed to said clamping device for adjustment to a definable setpoint clamping pressure;
- first and second directional control valves switchable independently of one another, said first directional control valve being connected in a hydraulic supply circuit between said first pressure reducing valve and said clamping device;
- and
- a second pressure reducing valve for adjusting fluid pressure conveyed to said clamping device being connected in a hydraulic circuit such that said second directional control valve is between said second pressure reducing valve and said clamping device, said first and second pressure reducing valves being switchable independently.
Dependencies are inferred from the claim text.