EP1564414A1 - Dispositif de commande hydraulique - Google Patents

Dispositif de commande hydraulique Download PDF

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Publication number
EP1564414A1
EP1564414A1 EP04029899A EP04029899A EP1564414A1 EP 1564414 A1 EP1564414 A1 EP 1564414A1 EP 04029899 A EP04029899 A EP 04029899A EP 04029899 A EP04029899 A EP 04029899A EP 1564414 A1 EP1564414 A1 EP 1564414A1
Authority
EP
European Patent Office
Prior art keywords
pressure
pump
pumps
line
cylinder
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
Application number
EP04029899A
Other languages
German (de)
English (en)
Other versions
EP1564414B1 (fr
Inventor
Michael Bökmann
Norbert Gwozdz
Manfred Mitze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bosch Rexroth AG
MAE Maschinen und Apparatebau Goetzen GmbH
Original Assignee
Bosch Rexroth AG
MAE Maschinen und Apparatebau Goetzen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bosch Rexroth AG, MAE Maschinen und Apparatebau Goetzen GmbH filed Critical Bosch Rexroth AG
Priority claimed from EP20030015768 external-priority patent/EP1387090B1/fr
Publication of EP1564414A1 publication Critical patent/EP1564414A1/fr
Application granted granted Critical
Publication of EP1564414B1 publication Critical patent/EP1564414B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • 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
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/20569—Type of pump capable of working as pump and 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • F15B2211/41536—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an output member
    • 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
    • F15B2211/40—Flow control
    • F15B2211/47—Flow control in one direction only
    • F15B2211/473—Flow control in one direction only without restriction in the reverse direction
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Definitions

  • the invention relates to a hydraulic drive for a consumer, especially for one Hydraulic cylinder according to the preamble of patent claim 1 as well as a suitable pumping arrangement.
  • a problem with the known hydraulic drives is that for quick extension of the cylinder a comparatively large pump is required. at Pressure build-up in the hydraulic cylinder is at this large pump generates a large restoring moment, so that the variable speed drive must be designed so that he can apply the appropriate torque.
  • Such strong electric motors are very expensive and stress a considerable volume of construction. Furthermore, the losses With such strong electric motors relatively large, so that one strives to use the smallest possible engines.
  • the invention is based on the object, a hydraulic Drive for one of a pumping arrangement and a hydraulic accumulator pressurized consumers educate in such a way that in a compact cheaper Construction allows a quick extension movement.
  • the hydraulic drive according to the invention can be particularly advantageous for a bending cylinder a Insert bending press.
  • the single FIGURE shows a circuit diagram of an inventive hydraulic drive for a bending press.
  • a bending press 1 has a double-acting executed Bending cylinder 2, over the one on a machine bed clamped workpiece 4 with the bending required force can be acted upon.
  • the bending cylinder 2 is an open circuit hydraulic drive with a pumping arrangement 6 and a Hydro accumulator 8 assigned.
  • the pumping arrangement 6 can sucked pressure medium from a tank T and over a Pressure line 10 in a bottom-side cylinder chamber 12th of the bending cylinder 2 are promoted.
  • the hydraulic accumulator 8 is via a storage line 14 with a piston rod side Annulus 16 of the bending cylinder 2 connected.
  • the pumping arrangement 6 has a variable-speed drive 18, so that for extending the bending cylinder 2 to the workpiece 4 towards pressure medium from the tank T via the pumping arrangement 6, the pressure line 10 in the cylinder chamber 12th is encouraged.
  • This effective in the extension direction pressure acts corresponding to the pressure in the hydraulic accumulator 8 Pressure in the annular space 16 against.
  • the direction of rotation of the pump assembly 6 via the variable speed drive 18 vice versa, so that Pressure fluid from the cylinder chamber 12 via the pumping arrangement 6 flows to the tank.
  • the pressure in the hydraulic accumulator 8 then acts in the retraction direction, so that the piston of the Bending cylinder 2 is retracted.
  • the pump assembly 6 acts as a motor, so that accordingly the drive 18, for example an asynchronous motor, as Generator acts.
  • the lifting position of the bending cylinder 2 is via a Wegmesssensor 20 detected, so that in dependence on whose signal is the drive of the drive 18 can.
  • Embodiment are the memory line 14 and the Pressure line 10 via a bypass line 22 with each other connected.
  • This bypass line is an adjustable Throttle device 24 is arranged.
  • the bypass line 22 is also a pressure relief valve 26 with connected to the tank T.
  • About the pressure relief valve 26th is the pressure in the hydraulic accumulator 8 to a predetermined, comparatively low limit set.
  • a check valve 28 is provided which is in the direction of Memory line 14 opens. This check valve 28 prevents when retracting the bending cylinder 2 Pressure medium from the annular space 16 and the hydraulic accumulator 8 in the pressure line 10 flows in and thus the hydraulic accumulator 8 is unloaded - in this case, the bending cylinder 2 stop or its return movement slowed down.
  • throttle device 24 may in the Bypass 22 also a flow control valve (not shown), via which the Storage line 14 incoming pressure medium volume flow independent of the pressure difference in the pressure line 10th and in the memory line 14.
  • Another alternative solution may be specific Applications are the throttle device 24 and if necessary, the pressure relief valve 26 by a Pressure reducing valve to replace. Through this valve will the pressure in the storage line 14 (secondary pressure) held constant, the valve with increasing pressure in the memory line increasingly closes and finally only leakage losses in the storage line balances.
  • the hydraulic accumulator 8 a safety valve 30 upstream.
  • Throttle device 22 By suitable adjustment of the opening cross section of Throttle device 22 can also during operation of Bending press a pressure medium flow for charging the Hydro accumulator 8 branched off from the pressure line 10 so that it is ensured that this is always on charged the predetermined limit. Since that Pressure relief valve 26 upon reaching this limit opens and thus a low pressure medium flow over the Bypass line 22 to the tank T out, the must Pump arrangement 6 operated at a slightly higher speed be, as in the inventive solutions without Bypass line is the case. By this speed increase a pressure pulsation of the pump is reduced so that a uniform extension movement of the bending cylinder. 2 is guaranteed.
  • a peculiarity of the one shown in the figure hydraulic drive is that the Pumping arrangement 6 of two coupled pumps exists, which are each designed as a constant pump.
  • the left in the figure pump, in the following small pump 30, is comparatively small Hubvolumen executed while the other, large pump 32 designed with a comparatively large displacement is.
  • Both pumps 30, 32 are coupled together and are driven by the variable speed drive 18.
  • the pressure port of the small pump 30 is over a High-pressure pump line 34 to the pressure line 10th connected.
  • a Pump pressure relief valve 36 arranged at Exceeding a maximum pressure in the High-pressure pump line 34 a connection to the tank T out auf Kunststofft, so that of the small pump 30th supplied pressure is limited to this maximum value.
  • From the high-pressure pump line 34 further branches a Nachsaug effet 38 from, in the direction of the tank T towards closing check valve 40 is arranged.
  • the large pump 32 is via a low pressure pump line 42 and a switching valve 44 with the pressure line 10 connected.
  • This switching valve 44 opens in his spring-biased home position the connection between the low-pressure pump line 42 and the pressure line 10th A counter to the force of a spring 46 acting control surface the switching valve 44 is connected via a control line 48 subjected to the pressure in the pressure line 10.
  • the switching valve 44 is in switched a switching position in which the low-pressure pump line 42 is connected to the tank T - the big one Pump 32 is then switched to non-pressurized circulation.
  • the pressure of the large pump 32 via another pump pressure relief valve 50 limited to a maximum value.
  • the Low pressure pump line 42 branches another Nachsaug effet 52 with check valve 54 from.
  • the Bypass line 22 with the associated valve assembly designed as an independent component.
  • a hydraulic drive for a Consumer preferably for a double-acting Cylinder, one of which pressure chamber via a pumping arrangement with variable speed drive with pressure medium supplyable is, while an effective in the opposite direction pressure chamber with the pressure of a hydraulic accumulator is applied.
  • the Pumping arrangement has two pumps with different Stroke volumes from the common variable speed Drive are driven, with at high pressures on Consumers only the pump with lower displacement is effective, so the drive with comparatively small torque can be designed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP04029899.4A 2002-08-02 2003-07-10 Dispositif de commande hydraulique Expired - Lifetime EP1564414B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10235631 2002-08-02
DE10235631 2002-08-02
DE10329067 2003-06-27
DE10329067A DE10329067A1 (de) 2002-08-02 2003-06-27 Hydraulischer Antrieb
EP20030015768 EP1387090B1 (fr) 2002-08-02 2003-07-10 Dispositif à actionnement hydraulique

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP03015768.9 Division 2003-07-10
EP20030015768 Division EP1387090B1 (fr) 2002-08-02 2003-07-10 Dispositif à actionnement hydraulique
EP20030015768 Division-Into EP1387090B1 (fr) 2002-08-02 2003-07-10 Dispositif à actionnement hydraulique

Publications (2)

Publication Number Publication Date
EP1564414A1 true EP1564414A1 (fr) 2005-08-17
EP1564414B1 EP1564414B1 (fr) 2017-06-14

Family

ID=30128713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04029899.4A Expired - Lifetime EP1564414B1 (fr) 2002-08-02 2003-07-10 Dispositif de commande hydraulique

Country Status (3)

Country Link
EP (1) EP1564414B1 (fr)
DE (1) DE10329067A1 (fr)
ES (1) ES2640347T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009052531A1 (de) 2009-11-11 2011-05-12 Hoerbiger Automatisierungstechnik Holding Gmbh Maschinenpresse
DE102011015903A1 (de) 2011-04-01 2012-10-04 Robert Bosch Gmbh Pumpenanordnung
CN111425469A (zh) * 2020-03-30 2020-07-17 安徽东海机床制造有限公司 一种弯板随动托料液压系统及其控制方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005043367B4 (de) * 2005-09-12 2016-09-08 Laeis Gmbh Steuervorrichtung und Steuerverfahren für eine Kolben-Zylinder-Anordnung
DE102008039011B4 (de) 2008-08-21 2020-01-16 MAE Maschinen- u. Apparatebau Götzen GmbH Druckspeicherlose hydraulische Antriebsanordnung sowie Verfahren zum druckspeicherlosen hydraulischen Antreiben eines Verbrauchers
DE102009058408A1 (de) 2009-07-09 2011-01-13 Robert Bosch Gmbh Elektrohydraulische Steuerung
DE102011011750A1 (de) 2011-02-18 2012-08-23 MAE Maschinen- u. Apparatebau Götzen GmbH Druckspeicherlose hydraulische Antriebsanordnung für und mit einem Verbraucher, insbesondere für Pressen sowie Verfahren zum Betreiben einer solchen druckspeicherlosen hydraulischen Antriebsanordnung
DE102013000725B4 (de) 2013-01-17 2024-02-08 Robert Bosch Gmbh Elektrohydraulische Steuerung
CN115255097A (zh) * 2022-08-16 2022-11-01 曼弗莱德智能制造(江苏)有限公司 一种冲压模具用的节能型液压机及节能方法

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DE102009052531A1 (de) 2009-11-11 2011-05-12 Hoerbiger Automatisierungstechnik Holding Gmbh Maschinenpresse
WO2011057773A2 (fr) 2009-11-11 2011-05-19 Hoerbiger Automatisierungstechnik Holding Gmbh Presse
US9044913B2 (en) 2009-11-11 2015-06-02 Hoerbiger Automatierungstechnik Holding GmbH Machine press
DE102011015903A1 (de) 2011-04-01 2012-10-04 Robert Bosch Gmbh Pumpenanordnung
DE102011015903B4 (de) 2011-04-01 2021-12-16 Robert Bosch Gmbh Pumpenanordnung
CN111425469A (zh) * 2020-03-30 2020-07-17 安徽东海机床制造有限公司 一种弯板随动托料液压系统及其控制方法
CN111425469B (zh) * 2020-03-30 2022-07-26 安徽东海机床制造有限公司 一种弯板随动托料液压系统及其控制方法

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