EP0692327B1 - Entraínement pour presses hydrauliques à grand nombre de cycles - Google Patents

Entraínement pour presses hydrauliques à grand nombre de cycles Download PDF

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Publication number
EP0692327B1
EP0692327B1 EP95110272A EP95110272A EP0692327B1 EP 0692327 B1 EP0692327 B1 EP 0692327B1 EP 95110272 A EP95110272 A EP 95110272A EP 95110272 A EP95110272 A EP 95110272A EP 0692327 B1 EP0692327 B1 EP 0692327B1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
pump
motor
hydraulic motor
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.)
Expired - Lifetime
Application number
EP95110272A
Other languages
German (de)
English (en)
Other versions
EP0692327A1 (fr
Inventor
Günther Schaich
Joachim Beyer
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.)
Mueller Weingarten AG
Original Assignee
Maschinenfabrik Mueller Weingarten AG
Mueller Weingarten AG
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 Maschinenfabrik Mueller Weingarten AG, Mueller Weingarten AG filed Critical Maschinenfabrik Mueller Weingarten AG
Publication of EP0692327A1 publication Critical patent/EP0692327A1/fr
Application granted granted Critical
Publication of EP0692327B1 publication Critical patent/EP0692327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
    • 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
    • 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
    • B30B15/163—Control arrangements for fluid-driven presses for accumulator-driven presses

Definitions

  • the invention relates to a control of the drive Hydraulic press according to the preamble of claim 1.
  • the press ram has a or several piston-cylinder units connected.
  • Essentials Characteristics of the hydraulic drive are the pressure and represents the flow rate of the pressure medium Pumps and control devices (power, pressure and Stroke controller) can both parameters on the respective Work process to be adjusted.
  • the High pressure pump can be used as a variable displacement pump or adjustable Hydraulic pump can be designed for continuous adjustment the flow rate and thus the ram speed guarantee.
  • a disadvantage of Direct drive is also that the position energy of the ram as well as the downward moving masses of the system stay as that from the ring cylinder during the downward movement pressure medium flowing out of the piston only via a Directional control valve is drained into a tank or oil tank.
  • Another form of drive for hydraulic presses is Combination of the pump drive with a storage drive according to DE 2747548. Used to reduce the energy requirement the excess retraction force that occurs when the Drive piston charges a storage system.
  • a double-acting drive piston is used here. This arrangement offers the possibility of one Working cycle the rapid traverse initially only by loading of the drive piston in a first cylinder-piston system to raise and later at a desired increase in pressing force a second cylinder-piston unit to pressurize.
  • the invention has for its object a novel Process of driving a hydraulic press to propose the one to those described above Systems addressed disadvantages can be avoided.
  • a press drive using a Hydraulic accumulator can be proposed, the high Efficiency with optimal mode of operation enabled.
  • the invention is based on the idea using Hydraulic energy is stored in a hydraulic motor Convert drive power or torque.
  • Secondary control Using the so-called “secondary control", a consistently high pressure level from a storage system a control pump or a controllable hydraulic motor supplied.
  • torque is a function of Hydraulic motor swivel angle that regulates the oil volume flow.
  • the working cylinder is lifted by the pump drive high speed and low pressure.
  • Figures 1 to 3 show schematically the plunger one Press with 2 cylinders and different drive systems.
  • the press ram 1 moves up and down via two hydraulic cylinders or Piston-cylinder units (2, 3), which act as lifting and Working cylinder to carry out the forming process or Serve punching operation on the workpiece.
  • the hydraulic cylinder 2 consists of one cylinder 4, a piston 5 and a piston rod 6, which with the Press ram 1 is connected.
  • the effective circular upper pressure surface A 1 on the working piston 5 is consequently determined by the diameter d 1 of the working piston 5.
  • the effective lower annular pressure surface A 2 is formed by the area difference with respect to the diameter d 1 of the working piston 5 minus the diameter d 2 of the piston rod 6.
  • the upper cylinder space 7 is with the lower cylinder space 8 connected via a hydraulic line 9, 9 '.
  • the press valve 10 is interposed.
  • a volume flow controllable is via line 11 Hydraulic pump 12 and a pump 13, which also functions as a hydraulic motor can be operated, connected to the press valve 10.
  • At 14 is also a pump or hydraulic motor operable hydraulic device referred to this Facility has a controllability of the Volume flow. There is a on the electric motor 15 Power Consumers 16.
  • a clutch 27 connects the pump / motor 13 to the pump / motor 14.
  • Pump / motor 14 is connected via line 17 and storage valve 18 connected to the storage system 19.
  • Line 20 connects the identical drive system 21 for the Hydraulic cylinder 3 with the common storage unit 19, however, there is also a separate storage unit for everyone Hydraulic cylinders 2, 3 possible.
  • the upper cylinder space 7 of the piston-cylinder unit 2 is included an additional prefilling device 22 provided for Compensation for the different filling volume of the two Cylinder rooms 7, 8 during the movement of the working piston 5 serves. Since there is no piston rod 6 in the upper cylinder space 7 is present, there is a volume difference in the two cylinder chambers 7, 8 displaced hydraulic medium.
  • the prefilling device 22 has a controllable one Check valve 23 and a hydraulic line 24 to one Oil container 25 on.
  • the arrow 26 shows one Flow direction of the check valve 23.
  • Fig. 2 can also use the drive for the hydraulic press a direct connection of the controllable pump / hydraulic motor 14 via the coupling 27 to the volume-adjustable hydraulic pump 12 be equipped, that is, the hydraulic motor 14 drives the Pump 12 directly on.
  • the hydraulic motor 14 drives the Pump 12 directly on.
  • 2 are hydraulic pumps 12 and Hydraulic pump or hydraulic motor 14 consequently directly on one Shaft connected to the electric motor 15 via couplings.
  • item 14 can be used both as a pump and as can also be operated as a motor.
  • FIG. 3 is the Pump / hydraulic motor arrangement 13 according to FIG. 1 with a Volume flow control equipped.
  • the drive system 21 is in the alternative solutions according to FIG. 2 and 3, as previously described, are identical.
  • the press drive according to the invention works as follows:
  • Coupling 27 can pump 12 and pump / motor 13 during uncouple this phase or 12, 13 is in a so-called "closed circuit” driven.
  • the pump / motor unit 14 is in the so-called zero position and runs without funding or works as a pump and delivers from container 25 'via line 17 and charging valve 18 in the storage system 19th
  • the second phase of work concerns the actual one Forming process or cutting process on the workpiece, d. H. the Actual working stroke, in which a high pressing force is required.
  • the press ram 1 with a greatly reduced working speed moved down, being used to perform the forming process an additional pressurization in the cylinder space 7 above the working piston 5 is required.
  • phase 1 the electric motor 15 was used to cover the base load.
  • an increase in the power requirement is measured by the power sensor 16 and a control signal is sent to the pump / motor device 14.
  • This causes a volume control on the hydraulic motor 14, which is now regulated from the zero position to a position precisely defined by the size of the adjustable swivel angle.
  • the storage valve 18 is opened and the storage pressure, in conjunction with the regulated volume flow, generates the required torque on the hydraulic motor 14. This torque is added to the torque of the drive motor 15 to form a total drive torque for the pumps 12 and 13.
  • the pumps 12 and 13 are thus in a position for the Forming process required pressure in the cylinder chamber 7 produce.
  • the workpiece Force profile is also the required pressure profile in the Cylinder chamber 7 process controllable.
  • the check valve 23 is opened and the pressure medium can be fed via line 24 into the oil container 25 flow.
  • the pump / hydraulic motor 14 is in the zero position switched and thus ineffective.
  • the drive of the pumps 12, 13 takes place only by the electric motor 15.
  • the Tappet After reaching the upper turning point, the Tappet initially in the rest position. In this phase the finished Workpiece removed and a new board to be machined fed.
  • the device 14 is operated as a pump and by the Electric motor 15 driven. From container 25 'then conveys the pump 14 via line 17 into the storage system 19. This Charging is finished until the desired one Has set pressure level in the storage system 19.
  • the press can then start a working cycle again.
  • the parallelism of the ram position and the synchronism of the Cylinder can be reached by a position measuring system 28 which gives control signals to the control pump 12, which for the Cruise control is decisive.
  • the invention is not based on that shown and described Embodiment limited. Rather, it includes everyone professional training within the scope of Property rights claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Control Of Presses (AREA)

Claims (10)

  1. Procédé pour régler l'entraínement d'une presse hydraulique, en particulier pour façonner et/ou découper des tôles, des matières synthétiques ou analogues, comportant au moins un vérin (2,3) pouvant être alimenté des deux côtés pour l'entraínement d'un coulisseau (1), le piston d'entraínement (5) étant alimenté par un fluide hydraulique dans le sens d'un éloignement du coulisseau (1),
    caractérisé en ce que, dans une première phase de travail de le presse pendant le mouvement de descente du coulisseau (1) non chargé, le cylindre supérieur (7) et le cylindre inférieur (8) du vérin (2,3) sont reliés par l'intermédiaire d'un dispositif à vanne (10), et en ce que, pour la phase de façonnage suivante de la presse, il est prévu un dispositif moteur/pompe (12 à 16) comportant un dispositif moteur hydraulique/pompe (14) de volume réglable, qui est entraíné au moins par l'intermédiaire d'un système de stockage (19) pouvant être chargé et dont le couple réglable peut être amené à un dispositif de pompe réglable (12), qui alimente le cylindre supérieur (7) du vérin (2,3), par l'intermédiaire du dispositif à vanne (10), en fluide hydraulique.
  2. Procédé selon la revendication 1,
    caractérisé en ce que le moteur hydraulique (14) peut être entraíné par un moteur électrique (15) avantageusement avec un récepteur de puissance (16), le moteur hydraulique (14) servant à augmenter le couple d'entraínement du moteur électrique (15) dans la phase de façonnage.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que le moteur hydraulique (14) peut être entraíné par un moteur électrique (15), le moteur hydraulique (14) servant comme pompe pour charger le système de stockage (19).
  4. Procédé selon une des revendications précédentes 1 à 3,
    caractérisé en ce que le dispositif moteur/pompe (12 à 16) comporte un moteur électrique (15) avantageusement avec un récepteur de puissance (16) dont le couple peut être transmis à un dispositif moteur hydraulique/pompe (14) ayant un courant volumique réglable, le dispositif moteur hydraulique/pompe (14) servant, d'une part, à charger un système de stockage (19) constitué d'un récipient de fluide hydraulique (25') et, d'autre part, à transmettre le couple, de façon commandée en volume, au moyen de l'énergie d'entraínement du système de stockage (19) à un autre dispositif moteur hydraulique/pompe (12,13), le cas échéant réglable, disposé en aval du dispositif moteur hydraulique/pompe (14), pour l'entraínement du coulisseau.
  5. Procédé selon la revendication 1 ou 4,
    caractérisé en ce que le dispositif moteur/pompe (12 à 15) comporte un moteur hydraulique (14), qui est relié avantageusement, par l'intermédiaire d'un dispositif de couplage (27), à un premier dispositif moteur hydraulique/pompe (13) le cas échéant réglable qui, de son côté, coopère avec une pompe hydraulique (12) de courant volumique réglable, dont le courant volumique réglable peut être amené d'un réservoir de fluide hydraulique (25'), par l'intermédiaire d'une vanne de presse (10), au cylindre supérieur (7) ou au cylindre inférieur (8) du vérin (2,3).
  6. Procédé selon une des revendications précédentes 1 à 5,
    caractérisé en ce que, pour une compensation de volume entre le cylindre supérieur (7) et le cylindre inférieur (8), le cylindre supérieur (7) du vérin (2,3) peut être alimenté en fluide hydraulique au moyen d'un dispositif de remplissage préalable (22) ayant un clapet de retenue commandable (23), ou le fluide hydraulique peut en être évacué.
  7. Procédé selon une des revendications précédentes 1 à 6,
    caractérisé en ce que, dans une troisième phase de travail après avoir effectué le processus de façonnage sur la pièce, le moteur électrique (15) entraíne, par l'intermédiaire d'une pompe hydraulique (14) se trouvant dans la "position 0", le dispositif moteur hydraulique/pompe (13) agissant comme pompe ou la pompe hydraulique (12) de courant volumique réglable, le fluide hydraulique étant transporté d'un réservoir (25'), par l'intermédiaire d'une vanne de presse (10), dans le cylindre inférieur (8) et un dispositif de remplissage préalable (22) effectuant une compensation de volume entre le cylindre supérieur (7) et le cylindre inférieur (8) du vérin (2,3).
  8. Procédé selon une des revendications précédentes,
    caractérisé en ce que, sur le coulisseau (1), sont prévus deux ou quatre vérins (2,3), qui sont actionnés de façon indépendante l'un de l'autre et de façon réglable par l'intermédiaire d'un système de mesure de déplacement (28) sur le coulisseau (1).
  9. Procédé selon la revendication 1, 4 ou 5,
    caractérisé en ce que le dispositif moteur hydraulique/pompe (14) de courant volumique réglable est relié, par l'intermédiaire d'un dispositif de couplage (27), à un dispositif moteur hydraulique/pompe (12,13) le cas échéant de courant volumique réglable et sert comme moyen d'entraínement.
  10. Procédé selon la revendication 1 ou 9,
    caractérisé en ce que, sur la pompe hydraulique (12) et/ou le dispositif moteur hydraulique/pompe (14), sont prévus des organes de réglage au moyen desquels il est effectué un réglage de volume ou de pression.
EP95110272A 1994-07-01 1995-07-01 Entraínement pour presses hydrauliques à grand nombre de cycles Expired - Lifetime EP0692327B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4423174 1994-07-01
DE4423174 1994-07-01

Publications (2)

Publication Number Publication Date
EP0692327A1 EP0692327A1 (fr) 1996-01-17
EP0692327B1 true EP0692327B1 (fr) 1998-01-28

Family

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EP95110272A Expired - Lifetime EP0692327B1 (fr) 1994-07-01 1995-07-01 Entraínement pour presses hydrauliques à grand nombre de cycles

Country Status (3)

Country Link
EP (1) EP0692327B1 (fr)
DE (2) DE59501353D1 (fr)
ES (1) ES2113699T3 (fr)

Cited By (1)

* 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

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19831624A1 (de) * 1998-07-15 2000-01-20 Mueller Weingarten Maschf Hydraulischer Antrieb für eine Presse
ATE444157T1 (de) * 2000-09-20 2009-10-15 Laeis Gmbh Steuervorrichtung für eine hydraulische presse sowie verfahren zu deren betrieb
TR200906352A2 (tr) * 2009-08-18 2010-12-21 Demi̇rer Teknoloji̇k Si̇stemler Sanayi̇ Ti̇caret Li̇mi̇ted Şi̇rketi̇ Hidrolik abkant preslerde enerji tasarrufu sağlayan bir yapılanma.
WO2011105973A1 (fr) * 2010-02-25 2011-09-01 Demirer Teknolojik Sistemler Sanayi̇ Ticaret Limited Sirketi Système hydraulique permettant d'effectuer des économies d'énergie dans des machines de presse à céramique et procédé associé
DE102011053615A1 (de) * 2011-09-14 2013-03-14 Ring Maschinenbau Gmbh & Co.Kg Verfahren zum Betreiben einer Stanze
DE102012102594B4 (de) 2012-03-26 2014-05-08 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Verfahren zum Herstellen von Formteilen aus Kunststoff
DE102012015118B3 (de) * 2012-04-17 2013-10-10 Hoerbiger Automatisierungstechnik Holding Gmbh Maschinenpresse
CN103042147B (zh) * 2012-12-31 2014-07-02 中国重型机械研究院股份公司 一种重型锻压装置高速液压控制方法
CN104439005B (zh) * 2014-10-27 2016-05-04 燕山大学 功率回收匹配型泵控油压机液压控制系统
ES2839073T3 (es) 2015-07-06 2021-07-05 Feintool Int Holding Ag Dispositivo y procedimiento para el control del accionamiento principal de una prensa troqueladora de precisión
CN105235267A (zh) * 2015-11-18 2016-01-13 合肥合锻机床股份有限公司 一种液压机滑块的液压支撑系统
DE102018222425A1 (de) * 2018-12-20 2020-06-25 Robert Bosch Gmbh Hydrostatischer Antrieb, insbesondere für eine Presse oder eine Spritzgießmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712225A1 (de) * 1987-04-10 1988-10-27 Sempell Armaturen Gmbh Hydraulikpumpensystem
DE3715261C1 (en) * 1987-05-08 1988-10-13 Schirmer Plate Und Siempelkamp Open-die forging press

Cited By (2)

* 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
WO2011057773A2 (fr) 2009-11-11 2011-05-19 Hoerbiger Automatisierungstechnik Holding Gmbh Presse

Also Published As

Publication number Publication date
EP0692327A1 (fr) 1996-01-17
DE19524042A1 (de) 1996-03-21
DE59501353D1 (de) 1998-03-05
ES2113699T3 (es) 1998-05-01

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