EP2452080A1 - Elektrohydraulische steuerung - Google Patents
Elektrohydraulische steuerungInfo
- Publication number
- EP2452080A1 EP2452080A1 EP10732281A EP10732281A EP2452080A1 EP 2452080 A1 EP2452080 A1 EP 2452080A1 EP 10732281 A EP10732281 A EP 10732281A EP 10732281 A EP10732281 A EP 10732281A EP 2452080 A1 EP2452080 A1 EP 2452080A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- valve
- pressure medium
- pressure
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 20
- 238000004891 communication Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/27—Directional control by means of the pressure source
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
Definitions
- the invention relates to an electro-hydraulic control for a safe electro-hydraulic axis.
- electro-hydraulic controls are used for example in presses or in injection molding machines, as well as in many other applications of industrial automation.
- Conventional presses are often valve-controlled. Via a proportional valve, a speed or a pressing force of a press cylinder are set.
- Safety requirements with regard to safety at work can be implemented, for example, by switching valves which block a hydraulic connection to the press cylinder in an unactuated position. The switching valves are also monitored by a switch which detects the switching position.
- the DIN EN 12622: 2001 shows in Annex C an example of a hydraulic press control circuit, are implemented in the safety requirements or occupational safety requirements.
- DE 103 29 067 A1 discloses an electro-hydraulic control for a press with a driven by a variable-speed drive hydraulic pump is disclosed.
- a cylinder space of a press cylinder over which a piston of the press cylinder in a press tion with a pump pressure of the hydraulic pump can be acted upon, is in direct pressure fluid connection with the hydraulic pump.
- An annular space of the press cylinder for pressurizing the piston against the pressing direction is connected to a hydraulic accumulator, which is charged via the hydraulic pump.
- a pressure relief valve is provided to limit the pressure of the pump pressure.
- Press cylinder in the pressing direction for example in an emergency situation, can be done only by stopping the hydraulic pump.
- the object of the present invention is to provide a reliable and as simple as possible or cost-effective implementation of occupational safety requirements in an electro-hydraulic control, which has a variable speed driven hydraulic machine. This object is achieved by an electro-hydraulic control according to claim 1.
- an electrohydraulic control for a safe electrohydraulic axle which comprises at least one hydraulic consumer.
- the control is used in particular for a press, an upper piston press or a press brake.
- the controller has a valve block with a first working port and a second working port for the hydraulic consumer.
- the valve block has two supply ports for a pressure medium supply and a pressure medium discharge. Fluidic paths are provided between at least one of the working ports and at least one of the supply ports.
- a hydraulic machine is connected between the two supply connections. This is coupled to an electric drive having an actuator for adjusting its speed.
- On the valve block further monitored switching valves are arranged, which is assigned to monitor their switching position in each case a monitoring device.
- two monitored switching valves are arranged one behind the other.
- at least two independent mutually effective security means present, which limit a supply of pressure medium in the second working port in a predetermined state.
- the valves which are flown through in the normal operating cycle - also all the monitored valves - are designed as switching valves, as a result of which throttle losses which occur with proportional valves are reduced.
- the safety means comprise at least one monitored switching valve arranged in a bypass path from the second working port to a tank. Due to the arrangement in the bypass path, the switching valve is flowed through only in emergency operation of pressure medium and thus causes in normal operation substantially no flow resistance.
- the safety means in each path which allows a pressure fluid supply to the second working port, comprise at least one monitored switching valve.
- the security means in each path which allows a pressure medium supply to the second working port, two monitored switching valves, whereby a high reliability is ensured.
- the safety means comprise a safety device on the electric drive of the hydraulic machine. This safety device forces a shutdown or an operating state with reduced power of the electric drive as a function of a release signal supplied to it.
- the safety means comprise a monitored switching valve, which fluidly connects the two supply ports in an unactuated position, whereby the supply of the hydraulic consumer is stopped with pressure medium.
- FIG. 1 in a hydraulic circuit diagram, an electro-hydraulic control according to an embodiment
- Figure 3 is a hydraulic circuit diagram of the electro-hydraulic control according to the embodiment.
- FIG. 4 in a hydraulic circuit diagram, the electro-hydraulic control according to the embodiment; and FIG. 5 shows in a hydraulic circuit diagram the electro-hydraulic control according to the exemplary embodiment.
- FIG. 1 shows a circuit diagram of a hydraulic press brake 1 is shown, which is constructed as a so-called upper piston press. This means that an upper pressing tool is moved up and down by a hydraulic cylinder 2 during a machine cycle.
- An electro-hydraulic control of the press brake 1 has an electronic unit 4, a variable-speed controllable electric drive 6, a hydraulic machine 8 with a constant delivery volume and a hydraulic control block 10.
- switching valves 12, 14, 16 and 18 are inter alia arranged. These are each provided with a switch 20 which monitors the unactuated or - the switching valve 16 - the actuated switching position.
- the signals of the switches 20 are supplied to a safety controller which switches off the press brake 1 when a fault occurs or moves to a safe position.
- a first working line 24 is connected, which connects this with a supply terminal X1 of the control block 10.
- a second working connection A2 of the hydraulic machine 8 is connected to a second supply connection X2 of the control block 10.
- the hydraulic machine 8 is driven via the electric drive 6, which can be coupled with it via a coupling 27.
- the switching valve 12 has two pump ports P1 and P2, wherein the pump port P1 is connected via the first supply terminal X1 of the control block 10 with the work 24 and the pump port P2 via the second supply port X2 with the second working line 26. Furthermore, the switching valve 12 has two working ports A, B, with which the hydraulic cylinder 2 is connectable.
- the hydraulic cylinder 2 has a piston 28 which separates a cylinder space 29 from an annular space 30.
- the annular space 30 is penetrated by a piston rod 31, which is connected to the upper pressing tool (not shown).
- the working port A of the switching valve 12 is connected to a pressure line 32, which opens into a working port Y1 of the control block 10, wherein the working port Y1 is connected to a consumer port Z1 of the hydraulic cylinder 2, which in turn is in fluid communication with the cylinder space 29.
- the switching valves 16, 18 are arranged in the pressure medium flow path between the working port B of the switching valve 12 and the annular space 30 of the hydraulic cylinder 2, the switching valves 16, 18 are arranged.
- a valve spool of the switching valve 12 Via a spring 33, a valve spool of the switching valve 12 is biased in a basic position a, in which the working lines 24, 26 of the hydraulic machine 8 connected and the working ports A, B are locked.
- Via an electric actuator 34 the valve spool of the switching valve 12 can be brought into a switching position b, in which the pump port P1 to the working port A and the pump port P2 to the working port B are connected.
- the switching valve 16 has two working ports A, B, a pump port P and a tank port T.
- the working port B of the switching valve 16 is connected to the working port B of the switching valve 12 via a connecting passage 35.
- the lower connection channel 36 is the pressure port A of the switching valve 16 with a working port B of the switching valve 18 in fluid communication.
- the pump connection P of the switching valve 16 is connected via a pump channel 37 to the second supply connection X2 of the control block 10 and thus to the second working line 26 connected to the hydraulic machine 8.
- a tank channel 38 is connected, which leads to a tank port T of the control block 10, which in turn is connected via a tank line 40 to a tank 42 in fluid communication.
- a valve spool of the switching valve 16 is biased by the spring 33 in a basic position a, in which the pump channel 37 is connected to the tank channel 38 and the connecting channels 35, 36 are separated from each other.
- the valve spool in the switching position b can be brought, in which the connecting channels 35, 36 connected to each other and the pump channel 37 is separated from the tank channel 38.
- the switching valve 18 has, in addition to the working port B, a further working port A, which is connected via an annular space channel 44 to a working port Y2 of the control block 10 and via an annular space line 46 connected thereto to the annular space 30 of the hydraulic cylinder 2.
- a valve spool of the switching valve 18 is biased by the spring 33 in the basic position a, in which a pressure medium connection is opened in the pressure fluid flow direction from the connecting channel 36 to the annulus 44 and closed in the reverse pressure fluid flow direction.
- switching position b of the valve spool of the switching valve 18 of the pressure fluid flow path between the connecting channel 35 and the annular space channel 44 can be flowed through in both pressure medium flow directions.
- the switching valves 12, 16, 18 are thus successively in a path from the hydraulic machine 8 to the annular space 30 of the hydraulic cylinder 2. In the unconfirmed basic position a, the switching valves 12, 16 each interrupt this path in both pressure medium flow direction and the switching valve 18 in a pressure medium flow direction.
- the switching valve 14 is arranged in a bypass path to the pressure line 32 and has a working port A, which via a pressure line 48 to a working port A of Shuttle valve 50 is connected. Via this, the pressure line 48 can be connected either to the connecting channel 32 via a first pressure port B1 of the shuttle valve 50 or to the pump channel 37 via a second pressure port B2, the pressure higher pressure port B1, B2 being connected to the working port A of the shuttle valve 50.
- the switching valve 14 Via a tank connection T, the switching valve 14 is in fluid communication with the tank channel 38. To a working port B of the switching valve 14 is a branched off from the connecting channel 32 working line 52 is connected. From a control connection S of the switching valve 14, a control line 54 leads to a pilot-operated check valve 56.
- a valve spool of the switching valve 14 is biased by the spring 33 in a basic position a, in which the pressure line 48 connected to the shuttle valve 50 is connected to the control line 54 and the tank line 38 to the working line 52.
- About the actuator 34 of the valve spool of the switching valve 14 in a switching position b can be brought, in which the pressure line 48 with the working line 52 and the tank line 38 with the control line 54 are in fluid communication.
- the check valve 56 which can be unlocked with a control pressure of the control line 54 is arranged between the tank 42 and the cylinder chamber 29 of the hydraulic cylinder 2.
- a valve body of the check valve 56 is biased by a spring on a valve seat.
- the check valve 56 opens in the pressure medium flow direction from the tank 42 to the cylinder chamber 29.
- the pressure port Z1 of the cylinder chamber 29 is disposed between the check valve 56 and the cylinder chamber 29.
- Another check valve 60 is arranged in the pressure line 48 between the shuttle valve 50 and the switching valve 14, which opens in the pressure fluid flow direction from the shuttle valve 50 to the switching valve 14.
- a check valve 61 in the tank channel 38 By a check valve 61 in the tank channel 38, a flow of pressure medium only in the direction of the tank 42 is possible.
- control line 54 is throttled between the switching valve 14 and the check valve 56.
- a pressure fluid flow path from the annular space 30 of the hydraulic cylinder 2 to the tank 42 is secured by a pressure limiting valve 84 which is set above the maximum nominal pressure of the hydraulic machine 8 and opens at a pressure in the annular space 30 of 350 bars, for example.
- This also has a small nominal size, e.g. NG 4, so that in case of release, the hydraulic cylinder 2 extends only slowly.
- a pressure limiting valve 88 or 90 connected to the tank 42 is likewise arranged.
- the pressure limiting valve 88 opens approximately at a pressure of 315 bar in the first working line 24 and the pressure relief valve 90 approximately at a pressure of 200 bar in the second working line 24.
- each working line 24 and 26 is connected to a suction line 92 and 94, respectively, which are in fluid communication with the tank 42.
- opening check valve 96, 98 is arranged. Due to the suction lines 92, 94 pressure fluid can be sucked out of the tank 42 by the hydraulic machine 8 in the absence of pressure medium.
- the cylinder chamber 29 of the hydraulic cylinder 2 is protected by the switching valve 12 against inadvertent supply of pressure medium.
- the two connections A1, A2 of the hydraulic machine 8 are connected and the consumer connections A, B of the Switching valve 12 locked.
- the switching valve 14 in the unactuated position, a bypass connection from the cylinder chamber 29 of the hydraulic cylinder 2, via the pressure line 32, the working line 52 and the tank channel 38 to the tank 42 ago.
- the electric drive 6 is included in the safety concept.
- Drive 6 has a secure control electronics, which only after the presence of a release signal of the switch 20, the drive 6 in the normal operating state in which the drive 6 converts control signals, switches. If the release signal is not present, the drive 6 is stopped or only with low power, i. operate with low torque or low speed.
- the press brake 1 is at a standstill.
- the switching valves 12 to 18 are in their unactuated currentless home position a.
- the first and the second working line 24, 26 of the hydraulic machine 8 are connected to each other via the switching valve 12 and the second working line 26 is in addition via the pump channel 37, the switching valve 16 and the tank channel 38 to the tank 42 in fluid communication.
- these fluid flow paths have been highlighted with a dashed line having a large line width.
- the pressure medium flow path from the annular chamber 30 of the hydraulic cylinder 2 is also highlighted with a dashed line having a large line width and ends at the switching valve 18 and the pressure limiting valve 84, 86th
- Figure 2 discloses the press brake 1 with the electro-hydraulic control, in which the piston 28 is moved with the piston rod 31 of the hydraulic cylinder 2 in a rapid downward.
- the switching valves 12, 14, 16 and 18 are each connected in the switching position b.
- the pressure medium flow paths between the annulus 30 and the cylinder chamber 29 of the hydraulic cylinder 2 and each of the hydraulic machine 8 are shown with a dashed line having a large line width.
- the hydraulic machine 8 promotes pressure medium from the annular space 30 into the cylinder chamber 29 as a hydraulic pump.
- the pressure medium from the annular space 30 of the hydraulic cylinder 2 is conveyed via the annular space line 46, the annular space channel 44, the switching valve 18, the switching valve 16 and the switching valve 12 via the second Working management 26 to the hydraulic machine 8 and from there via the first working line 24, the switching valve 12, the pressure line 32 to the cylinder chamber 29 of the hydraulic cylinder 2 promoted. With additional demand for pressure medium, this can be sucked through the check valve 56 from the tank 42.
- the switching valves 12, 16, 18 are arranged, which are each monitored by the switch 20.
- the monitoring has the purpose that the hydraulic machine 8 promotes pressure fluid from the annulus 30 into the cylinder chamber 29 of the hydraulic cylinder 2 only when the switching valves 12, 16, 18 are in the switching position b.
- the switches 20 report the switching position b to the electronics 4, which controls the electric drive 6. To stop the rapid traverse, one of the switching valves 12, 16, 18 is simply switched to the initial position b without a current.
- the electric drive 6 instead of the automatic actuation of the electric drive 6 via the electronics 4, with confirmed switching position of the switching valves 12, 16, 18 via the switch 20, an operator, for example, after an optical or acoustic confirmation signal is output, the electric drive 6 start manually.
- the switching valves 12 and 14 serve as a safety means which limit a supply of pressure medium to the cylinder chamber 29 of the hydraulic cylinder 2 in the non-actuated state and thus interrupt a displacement of the piston 28 in the pressing direction.
- the check valve 56 associated with the hydraulic cylinder 2 is opened with the pump pressure, whereby the cylinder space 29 is closed Tank 42 is relieved.
- FIG. 3 the switching positions of the electro-hydraulic control for the press brake 1 for a crawl of the piston 28 of the hydraulic cylinder 2 are shown.
- the switching valves 12, 14 and 16 are actuated and the switching valve 18 is not actuated.
- the non-actuated switching valve 18 is a pressure medium flow path (having large line thickness dashed line in FIG. 3) between the annular space 30 of the hydraulic cylinder 2 and the hydraulic machine 8 only via the pressure limiting valve 86.
- This opens only at a certain annulus pressure in the annular space 30, for example, 90 bar, which causes this annulus pressure counteracts the working pressure in the cylinder chamber 29, whereby the adjustment speed of the piston 28 of the hydraulic cylinder 2 is reduced and this is moved in crawl.
- FIG 4 shows the switching positions of the electro-hydraulic control for a decompression of the hydraulic cylinder 2 of the press brake 1.
- the hydraulic machine 8 promotes hydraulic pump as pressure medium from the cylinder chamber 29 of the hydraulic cylinder 2 to the tank 42.
- This pressure medium from the cylinder chamber 29, via the pressure line 32, the switching valve 12, the first working line 24, the second working line 26, the switching valve 16 to the tank 42 promoted ,
- the press brake 1 is thus relieved, since the working pressure in the cylinder chamber, 29 of the hydraulic cylinder 2 is reduced.
- the piston 28 of the hydraulic cylinder 2 is moved upwards in rapid traverse.
- the switching valves 12 and 16 are actuated. Pressure medium is thus promoted by the cylindrical space 29 of the hydraulic cylinder 2 via the pressure line 32, the switching valve 12, the first working line 24, the second working line 26, the switching valve 12, the switching valve 16, the switching valve 18 and the annular space channel 44 to the annular space 30.
- the check valve 56 is controlled by the pressure in the control line 54, which is connected via the switching valve 14, the shuttle valve 50 and connected to the second working line 26 pump channel 37.
- the following table gives an overview of the sections of the machine cycle described above in FIGS. 1 to 5. It also indicates, by marking the respective table field, which of the switching valves 12, 14, 16, 18 are actuated in the respective cycle section.
- the controller comprises a valve block having a first working port and a second working port for a hydraulic consumer and having two supply ports for a pressure medium supply and a fluid discharge and having fluidic paths between at least one of the working ports and at least one of the supply ports, a hydraulic machine , which is connected between the two supply ports, an electric drive which is coupled to the hydraulic machine and which has an actuator for adjusting its speed, and has arranged on the valve block monitored switching valves, which is assigned to monitor their switching position in each case a monitoring device.
- two monitored switching valves arranged one behind the other, and there are at least two independently effective safety means which limit a supply of pressure medium in the second working port in a predetermined state.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009032694 | 2009-07-09 | ||
DE102009058408A DE102009058408A1 (de) | 2009-07-09 | 2009-12-15 | Elektrohydraulische Steuerung |
PCT/EP2010/003669 WO2011003506A1 (de) | 2009-07-09 | 2010-06-17 | Elektrohydraulische steuerung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2452080A1 true EP2452080A1 (de) | 2012-05-16 |
EP2452080B1 EP2452080B1 (de) | 2016-06-01 |
Family
ID=43307926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10732281.0A Active EP2452080B1 (de) | 2009-07-09 | 2010-06-17 | Elektrohydraulische steuerung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2452080B1 (de) |
CN (1) | CN102549273B (de) |
DE (1) | DE102009058408A1 (de) |
WO (1) | WO2011003506A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012218903B4 (de) * | 2012-10-17 | 2023-02-16 | Robert Bosch Gmbh | Hydraulische Ventilanordnung und hydraulische Maschinenanordnung mit einer derartigen Ventilanordnung |
CN103847128B (zh) * | 2012-11-30 | 2015-11-18 | 江苏沃得机电集团有限公司 | 液压控制系统 |
DE102013000725B4 (de) | 2013-01-17 | 2024-02-08 | Robert Bosch Gmbh | Elektrohydraulische Steuerung |
CN103925261B (zh) * | 2014-04-10 | 2015-11-18 | 中煤科工集团西安研究院有限公司 | 一种钻机用电液控制防碰装置 |
CN105782173B (zh) * | 2014-07-25 | 2017-10-03 | 泉州丰泽鸿益建材机械有限公司 | 一种自然冷却节能的砌块成型机 |
DE102014218887B3 (de) * | 2014-09-19 | 2016-01-28 | Voith Patent Gmbh | Hydraulischer Antrieb mit Eilhub und Lasthub |
DE102014219734A1 (de) * | 2014-09-30 | 2016-03-31 | Robert Bosch Gmbh | Hydraulische Schaltung zur Druckmittelversorgung eines Differentialzylinders |
DE202015106161U1 (de) | 2015-11-13 | 2015-11-27 | Hoerbiger Automatisierungstechnik Holding Gmbh | Elektrohydraulische Antriebseinheit |
WO2017186712A1 (de) | 2016-04-25 | 2017-11-02 | Robert Bosch Gmbh | Hydraulische achse für eine presse |
DE102016118854A1 (de) | 2016-10-05 | 2018-04-05 | Hoerbiger Automatisierungstechnik Holding Gmbh | Elektrohydraulische Antriebseinheit |
DE102016118853B3 (de) | 2016-10-05 | 2017-10-26 | Hoerbiger Automatisierungstechnik Holding Gmbh | Elektrohydraulische Antriebseinheit |
DE102018120000A1 (de) * | 2018-08-16 | 2020-02-20 | Moog Gmbh | Elektrohydrostatisches Aktuatorsystem mit Nachsaugbehälter |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4330038A1 (de) * | 1993-09-06 | 1995-03-09 | Abb Management Ag | Hydraulische Sicherheitsschaltung |
JP3606390B2 (ja) * | 1994-12-21 | 2005-01-05 | 株式会社小松製作所 | 油圧プレスの金型保護装置 |
DE10329067A1 (de) | 2002-08-02 | 2004-02-12 | Bosch Rexroth Ag | Hydraulischer Antrieb |
CN2617566Y (zh) * | 2002-12-27 | 2004-05-26 | 中国石化齐鲁股份有限公司 | 电液比例控制橡胶压块机 |
AT505724B1 (de) * | 2007-09-12 | 2010-06-15 | Trumpf Maschinen Austria Gmbh | Antriebsvorrichtung für eine biegepresse |
-
2009
- 2009-12-15 DE DE102009058408A patent/DE102009058408A1/de not_active Withdrawn
-
2010
- 2010-06-17 WO PCT/EP2010/003669 patent/WO2011003506A1/de active Application Filing
- 2010-06-17 CN CN201080035124.3A patent/CN102549273B/zh not_active Expired - Fee Related
- 2010-06-17 EP EP10732281.0A patent/EP2452080B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011003506A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102009058408A1 (de) | 2011-01-13 |
CN102549273B (zh) | 2016-03-23 |
WO2011003506A1 (de) | 2011-01-13 |
CN102549273A (zh) | 2012-07-04 |
EP2452080B1 (de) | 2016-06-01 |
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