EP0972631A1 - Hydraulischer Antrieb für eine Presse - Google Patents
Hydraulischer Antrieb für eine Presse Download PDFInfo
- Publication number
- EP0972631A1 EP0972631A1 EP99111751A EP99111751A EP0972631A1 EP 0972631 A1 EP0972631 A1 EP 0972631A1 EP 99111751 A EP99111751 A EP 99111751A EP 99111751 A EP99111751 A EP 99111751A EP 0972631 A1 EP0972631 A1 EP 0972631A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- pump
- press
- cylinder
- motor
- 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
Images
Classifications
-
- 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
- B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
-
- 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
- B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high 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
- B30B15/163—Control arrangements for fluid-driven presses for accumulator-driven presses
Definitions
- the invention relates to a hydraulic drive for a Press according to the preamble of claim 1.
- step The workpiece is transfer-pressed over several Work operations made.
- the shape of Upper tool and lower tool in the respective stage determines the progress of the machining process.
- GT presses large-part step presses
- All ram movements take place synchronized from a central main drive via a Press gear located in the head of the press.
- the longitudinal and / or Cross movements as well as possible lifting movements of the Transport device for the workpiece transport from Main drive derived and are thus with the plunger movement synchronized.
- Step or transfer presses or GT presses related to the Forming path within the stage and related to the Transport process between the steps is geometrically defined.
- Such presses are e.g. B. as eccentric and crank presses designed.
- the kinematics of the thrust crank gear determines the movement of the working ram, the respective Crank angle determines the forming force.
- the ram speed is also in the direct connection to the crank angle and it results thus a rigid process flow.
- Have mechanical presses high efficiency and can with high stroke rate are operated because the flywheel only uses so much energy is taken as this is the press movement and the Operation required.
- Hydraulically operated presses work according to the hydrostatic principle with a uniform Pressure spread in a liquid, the pressure on a piston surface of a cylinder-piston system one for pressure proportional force generated. This allows a hydraulic driven ram at every point of the ram stroke and thus a force up to Unfold the nominal force of the press. Hydraulic presses are therefore preferred in those fields of metal forming technology where the force along the ram travel is constant or must be controllable depending on the process and also where a large forming path is required.
- a hydraulic press Storage drive Different from such a direct pump drive is the drive of a hydraulic press Storage drive.
- the pump acts on the direct drive with every work process directly on the Cylinder-piston system, so promotes the pressure accumulator drive the pump first into a high-pressure accumulator, from which then the working cylinder via a proportional valve or Servo valve is fed with nominal pressure. Therefore, when direct pump drive the pump and the drive motor to the greatest current press power requirements be designed.
- the delivery rate of the High pressure pump is usually the ram speed infinitely adjustable.
- the speed of the ram in the accumulator drive only indirectly from the Pump performance is affected, so that the pump performance designed an average energy requirement and thus smaller can be dimensioned.
- Working ability at Storage drive is then on in the high pressure storage stored energy limited.
- A is then used to retract and optimize these tools hydraulic press used on the individual Forming stages of the GT press can be simulated.
- the tool press can be used after the tool change Production without any significant interruption continue.
- the invention is based, the Field of application of such hydraulic simulation presses to expand.
- a hydraulic Simulation press also for pilot series or small series be suitable.
- the efficiency should be essential be improved.
- the invention is based on the main idea that a conventional hydraulic simulation press in terms of construction is expanded by the fact that a certain production plant for the production of pilot series or small series also with this press is possible. This is done by supplementing the conventional hydraulic press through a kind "hydraulic transformer", by means of which the Operating mode from a simulation operation into one without any problems Production operations can be changed.
- the so-called “hydraulic transformer” by an arrangement of several hydraulic devices adjustable by swivel angle formed in principle as so-called. Hydro engines and Hydro pumps are known.
- Hydro engines and Hydro pumps are known.
- a corresponding arrangement of swivel angle adjustable Hydraulic devices for driving a Cylinder-piston unit is shown.
- a hydraulic press can be used by any facility Simulation operation in a production facility changed become.
- the so-called. hydraulic transformer switched off when Production operation is switched on.
- the Ram speed can be reduced to z. B. 30 - 60 mm / sec. depending on the size of the transformer with 4 - 6 strokes / min. a higher output of Allows sharing.
- By connecting the hydraulic Transformer efficiency will be 60 - 75% increased, whereby working strokes of approx. 150 mm at one Total stroke of approx. 700 mm can be easily adjusted.
- the Cycle times are on the order of ⁇ 10 seconds. According to this data, zero series or Small series can be driven economically, so that a such a hydraulic press significantly expanded Intended use received. This leads to a significant increased area of application of such special presses. She can be used as a simulation press for adjustment work e.g. B. a GT press as well as a production press for Small series can be used.
- the figure shows a basic representation of the structure and Plant schemes of the invention.
- a press ram 1 is shown for a hydraulic press, not shown, which receives an upper tool, not shown, on its underside.
- the up and down movement of the press ram 1 takes place hydraulically via at least one cylinder-piston unit 2 acting on the press ram 1, which serves as a lifting and working cylinder for carrying out the forming process on the workpiece.
- the cylinder-piston unit 2 has a working cylinder 3, inside which a working piston 4 is moved up and down.
- the working piston 4 has on its lower side a piston rod 5 which is connected to the press ram 1.
- the effective circular cylindrical upper pressure surface F 1 on the working piston 4 is consequently determined by the diameter d 1 of the working piston 4.
- the effective lower circular pressure surface F 2 is formed by the difference in area of the diameter d 1 of the working piston 4 minus the diameter d 2 of the piston rod 5.
- the press according to the invention has two operating states. First, the first operating state is called “Simulation mode” explained.
- Analogous to a conventional hydraulic simulation press is the by means of an accumulator drive Cylinder-piston unit 2 actuated.
- a High-pressure accumulator 8 by means of a pump arrangement 9 on the maximum pressure required, being a Control block 10, the line sections 11, 12 between Pump arrangement 9 and high pressure accumulator 8 connects.
- the pump assembly 9 for a storage drive usually consists of a Constant pump, zero stroke pump or a variable displacement pump.
- a drive motor 13 for one Feed pump 14 shown, the hydraulic medium from a Oil tank or tank 15 promotes.
- the funding direction of the Constant pump 14 shown is with arrow 16 represented symbolically.
- the Control block 10 To operate the cylinder-piston unit, the Control block 10 a proportional valve arrangement, so that the hydraulic medium from the high pressure accumulator 8 with Nominal pressure over a arranged in the control block 10 Proportional valve arrangement or servo valve (continuous valve) and via the supply line 17 with the supplementary line 18 to the upper circular cylindrical cylinder space 6 of the cylinder-piston unit to be led. At the same time it will Hydraulic medium from the annular cylinder space 7 via a Supplementary line 19 and via line 20 to the control block 10 performed, wherein the pressure relief of the print medium the cylinder space 7 to a not shown Oil tank is done. As a result, the press ram 1 in Downward direction actuated.
- the conventional hydraulic described above Simulation press is inventively by a so-called hydraulic transformer 27 complements, as in the Figure representation with a dashed line is drawn.
- This is a first Hydraulic device 28, which is adjustable as the swivel angle Motor pump assembly 29 is formed.
- This arrangement is used in particular as a hydraulic motor in the direction of arrow 30 specified flow direction operated, the by the Arrow 31 shown adjustability of this hydraulic motor changed swallowing volume and thus a changed Flow allowed.
- the speed of the hydraulic motor is determined by a speed controller 32 detects.
- the drive for the Hydro motor 29 takes place via the high-pressure accumulator 8 and the supply line 33.
- An oil tank 34 is used to hold the hydraulic medium flowing through the hydraulic motor 29.
- the hydraulic device 29 acting as a hydraulic motor is a second via a mechanical coupling device 35 Associated hydraulic device 36.
- This Hydraulic device 36 is also as Pump motor device 37 that can be swiveled through an angle the upper and lower double arrows 38, 39 the operation of this device as a pump or motor in occupy two flow directions.
- the only upper double arrow 40 in the hydraulic device 29 indicates that this arrangement as a hydraulic motor or as Pump in only one, opposite flow direction can be actuated.
- pressure medium drives the hydraulic motor 29 in turn by means of a targeted and controllable Setting via the clutch assembly 35 as Hydraulic pump acting device 37 drives.
- This too Pump arrangement is in accordance with arrow 41 adjustable swivel angle so that the absorption volume of the pump and thus the through flow through the hydraulic pump is infinitely variable.
- the hydraulic pump 37 are a first in the entrance area Shut-off valve 42 and another in the exit area Shut-off valve 43 assigned, which the flow of Feeds pressure medium through the hydraulic transformer or prevents or closes the hydraulic transformer switches off. In the illustration shown is the passage drawn blocked by these valves.
- shut-off valve 44 is a so-called hydraulic connector between the high pressure accumulator 8 and of the first hydraulic device 28.
- the hydraulic transformer 27 therefore enables one Supplement to the press explained for simulation mode Implementation of a production operation, with a targeted Regulation or control of the pressure curve via the two Hydraulic devices 28, 36 is made possible.
- the special one lies in the interaction of the conventional ones hydraulic press arrangement with the loading of the Cylinder-piston unit 2 over the medium of the Pressure fluid storage 8 and the additional use of a so-called hydraulic transformer 27.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
- 1
- Pressenstößel
- 2
- Zylinder-Kolbeneinheit
- 3
- Arbeitszylinder
- 4
- Arbeitskolben
- 5
- Kolbenstange
- 6
- kreiszyl. Zylinderraum
- 7
- ringförmiger Zylinderraum
- 8
- Hochdruckspeicher
- 9
- Pumpenanordnung
- 10
- Steuerblock
- 11
- Leitungsabschnitte
- 12
- Leitungsabschnitte
- 13
- Antriebsmotor
- 14
- Förderpumpe
- 15
- Ölbehälter/Tank
- 16
- Pfeil
- 17
- Zufuhrleitung
- 18
- Ergänzungsleitung
- 19
- Ergänzungsleitung
- 20
- Leitung
- 23
- Vorfülleinrichtung
- 24
- Rückschlagventil
- 25
- Hydroleitung
- 26
- Ölbehälter
- 27
- hydraulischer Transformator
- 28
- 1. schw. Hydraulikeinrichtung
- 29
- Motor-Pumpenanordnung
- 30
- Pfeil
- 31
- Pfeil
- 32
- Drehzahlregler
- 33
- Zufuhrleitung
- 34
- Öltank
- 35
- mech. Kupplungseinrichtung
- 36
- 2. Hydraulikeinrichtung
- 37
- Pumpen-Motoreinrichtung
- 38
- Doppelpfeil
- 39
- Doppelpfeil
- 40
- Doppelpfeil
- 41
- Pfeil
- 42
- Absperrventil
- 43
- Absperrventil
- 44
- Absperrventil (hydr. Stecker)
Claims (8)
- Hydraulischer Antrieb für eine Presse, insbesondere für eine Presse zur Simulation der Betriebsbedingungen von mechanischen Stufen- oder Transferpressen bzw. Großteil-Stufenpressen (GT-Pressen) mit wenigstens einer doppelseitig beaufschlagbaren Zylinder-Kolbeneinheit (2) mit einem Druckspeicherantrieb für einen Pressenstößel (1), wobei ein Hochdruckspeicher (8) mittels einer Motor-Pumpeneinheit (9) auf den maximalen Nenndruck aufgeladen und die Zylinder-Kolbeneinheit (2) über Proportionalventile (10) mittels des Speicherdrucks mit Hydraulikmedium beaufschlagbar ist, dadurch gekennzeichnet, daß zur Umstellung der Presse von einem "Simulationsbetrieb" mit hoher Stößelgeschwindigkeit und niedriger Hubzahl in einen "Produktionsbetrieb" mit niedrigerer Stößelgeschwindigkeit und höherer Hubzahl dem Druckspeicherantrieb für die Zylinder-Kolbeneinheit (2) ein "hydraulischer Transformator" (27) zugeordnet ist, bestehend aus einer 1. Hydraulikeinrichtung (28), die als schwenkwinkelverstellbarer Hydro-Motor (29) ausgebildet ist und einer mechanisch hiermit verbundenen 2. Hydroeinrichtung (36), die als schwenkwinkelverstellbare Hydro-Pumpe ausgebildet ist, wobei der Hydro-Speicher (8) der Pumpenanordnung im Simulationsbetrieb gleichermaßen zum Antrieb der 1. Hydro-Einrichtung (28, 29) dient.
- Antrieb nach Anspruch 1, dadurch gekennzeichnet, daß im Simulationsbetrieb der Hydro-Speicher (8) über einen Steuerblock (10) mittels einer Motor-Pumpenanordnung (9) aufgeladen und über den Steuerblock (10) die Zylinder-Kolbeneinheit (2) betätigbar ist.
- Antrieb nach Anspruch 2, dadurch gekennzeichnet, daß der Steuerblock (10) zur Steuerung bzw. Regelung der Arbeitszustände der Zylinder-Kolbeneinheit (2) im Simulationsbetrieb dient, wobei Geschwindigkeitsbereiche des Pressenstößels (1) bis zu 500 mm/sek. bei 1 - 2 Hüben/min. einstellbar sind.
- Antrieb nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß die Druckbeaufschlagung bzw. Druckentlastung der Zylinderräume (6, 7) der Zylinder-Kolbeneinheit (2) über Servoventile, Stetigventile bzw. eine Proportionalventilsteuerungen im Steuerblock (10) erfolgt.
- Antrieb nach Anspruch 1, dadurch gekennzeichnet, daß ein Produktionsbetrieb durch ein Hinzuschalten eines hydraulischen Transformators (27) zur Pressenanordnung nach dem Simulationsbetrieb erfolgt, wobei der obere Zylinderraum (6) und der untere Zylinderraum (7) der Zylinder-Kolbeneinheit (2) über wenigstens eine Absperrventilanordnung (42, 43) und einer schwenkwinkelverstellbaren Hydro-Motor/Hydro-Pumpenanordnung (36, 37) verbunden sind.
- Antrieb nach Anspruch 5, dadurch gekennzeichnet, daß die Hydraulikeinrichtung (36) als Pumpen-Motoranordnung ausgebildet ist, wobei die Pumpe oder Motor in je zwei Strömungsrichtungen arbeitet.
- Antrieb nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß die Hydraulikeinrichtung (28) als schwenkwinkelverstellbare Pumpen-Motoranordnung ausgebildet ist, wobei die Pumpe in einer Strömungsrichtung und der Motor in der entgegengesetzten Strömungsrichtung arbeitet.
- Antrieb nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, daß der Hydraulikeinrichtung (28) ein Drehzahlgeber (32) zugeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19831624A DE19831624A1 (de) | 1998-07-15 | 1998-07-15 | Hydraulischer Antrieb für eine Presse |
DE19831624 | 1998-07-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0972631A1 true EP0972631A1 (de) | 2000-01-19 |
EP0972631B1 EP0972631B1 (de) | 2003-03-26 |
Family
ID=7874057
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99111751A Expired - Lifetime EP0972631B1 (de) | 1998-07-15 | 1999-06-18 | Hydraulischer Antrieb für eine Presse |
Country Status (3)
Country | Link |
---|---|
US (1) | US6370873B1 (de) |
EP (1) | EP0972631B1 (de) |
DE (2) | DE19831624A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011021986A1 (en) * | 2009-08-18 | 2011-02-24 | Demirer Teknolojik Sistemler Sanayi Ticaret Limited Sirketi | Energy saving in hydraulic bending presses |
AT516316B1 (de) * | 2014-09-29 | 2017-11-15 | Bosch Gmbh Robert | Verfahren zur Steuerung einer hydraulisch angetriebenen Maschine |
AT515369B1 (de) * | 2014-02-14 | 2018-03-15 | Thomas Dr Loecher | Anordnung zur Regelung eines hydraulischen Antriebselements |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000136806A (ja) * | 1998-11-04 | 2000-05-16 | Komatsu Ltd | 圧油のエネルギー回収装置および圧油のエネルギー回収・再生装置 |
EP1318906B1 (de) * | 2000-09-20 | 2009-09-30 | LAEIS GmbH | Steuervorrichtung für eine hydraulische presse sowie verfahren zu deren betrieb |
DE10250207A1 (de) * | 2002-10-28 | 2004-05-13 | Bosch Rexroth Ag | Dämpfungsvorrichtung |
US6854268B2 (en) * | 2002-12-06 | 2005-02-15 | Caterpillar Inc | Hydraulic control system with energy recovery |
ES2237279B1 (es) * | 2003-04-11 | 2006-11-01 | Onapres, S. Coop. | Prensa hidraulica de pruebas de alta velocidad para emulacion de prensas mecanicas. |
US7409826B2 (en) * | 2005-08-30 | 2008-08-12 | Grigoriy Epshteyn | Compact hydrostatic energy recuperation system and method of operation |
US7775040B2 (en) * | 2006-11-08 | 2010-08-17 | Caterpillar Inc | Bidirectional hydraulic transformer |
US20080155975A1 (en) * | 2006-12-28 | 2008-07-03 | Caterpillar Inc. | Hydraulic system with energy recovery |
US8739950B2 (en) * | 2008-09-25 | 2014-06-03 | Gm Global Technology Operations, Llc | Auxiliary pump system for hybrid powertrains |
GB2472593B (en) * | 2009-08-11 | 2012-10-24 | Mactaggart Scott | Energy converter device |
DE102011000473B4 (de) * | 2011-02-02 | 2017-07-13 | Langenstein & Schemann Gmbh | Pressmaschine und Verfahren zum Pressen von Werkstücken |
EP2742185B1 (de) | 2011-08-12 | 2018-02-21 | Eaton Corporation | System und verfahren zur energierückgewinnung und nivellierung von hydrauliksystemlasten |
WO2013025416A2 (en) | 2011-08-12 | 2013-02-21 | Eaton Corporation | Method and apparatus for recovering inertial energy |
JP5767996B2 (ja) * | 2012-03-29 | 2015-08-26 | カヤバ工業株式会社 | 流体圧駆動ユニット |
JP5934543B2 (ja) * | 2012-03-29 | 2016-06-15 | Kyb株式会社 | 流体圧駆動ユニット |
WO2014099926A1 (en) | 2012-12-19 | 2014-06-26 | Eaton Corporation | Control system for hydraulic system and method for recovering energy and leveling hydraulic system loads |
IT201800007019A1 (it) * | 2018-07-09 | 2020-01-09 | Impianto fluidodinamico per l'azionamento controllato della slitta di una pressa |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4707988A (en) * | 1983-02-03 | 1987-11-24 | Palmers Goeran | Device in hydraulically driven machines |
EP0311779A2 (de) * | 1987-10-10 | 1989-04-19 | Robert Bosch Gmbh | Hydraulische Steuereinrichtung für eine Presse |
DE4429782A1 (de) * | 1993-09-02 | 1995-03-09 | Mueller Weingarten Maschf | Verfahren zur Regelung des Antriebs einer hydraulischen Presse und Vorrichtung zur Durchführung des Verfahrens |
US5460084A (en) * | 1993-03-16 | 1995-10-24 | Maschinenfabrik Mueller-Weingarten Ag | Method for controlling the drive of a hydraulic press |
EP0692327A1 (de) * | 1994-07-01 | 1996-01-17 | Maschinenfabrik Müller-Weingarten Ag | Antrieb für hydraulische Pressen mit hoher Hubzahl |
DE4436666A1 (de) * | 1994-10-13 | 1996-04-18 | Rexroth Mannesmann Gmbh | Hydraulisches Antriebssystem für eine Presse |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL94143B1 (de) * | 1974-11-23 | 1977-07-30 | ||
JP3795112B2 (ja) * | 1995-10-25 | 2006-07-12 | 川崎油工株式会社 | 油圧プレスの金型成形トライアル油圧制御方法 |
-
1998
- 1998-07-15 DE DE19831624A patent/DE19831624A1/de not_active Withdrawn
-
1999
- 1999-06-18 EP EP99111751A patent/EP0972631B1/de not_active Expired - Lifetime
- 1999-06-18 DE DE59904695T patent/DE59904695D1/de not_active Expired - Fee Related
- 1999-07-14 US US09/351,918 patent/US6370873B1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4707988A (en) * | 1983-02-03 | 1987-11-24 | Palmers Goeran | Device in hydraulically driven machines |
EP0311779A2 (de) * | 1987-10-10 | 1989-04-19 | Robert Bosch Gmbh | Hydraulische Steuereinrichtung für eine Presse |
US5460084A (en) * | 1993-03-16 | 1995-10-24 | Maschinenfabrik Mueller-Weingarten Ag | Method for controlling the drive of a hydraulic press |
DE4429782A1 (de) * | 1993-09-02 | 1995-03-09 | Mueller Weingarten Maschf | Verfahren zur Regelung des Antriebs einer hydraulischen Presse und Vorrichtung zur Durchführung des Verfahrens |
EP0692327A1 (de) * | 1994-07-01 | 1996-01-17 | Maschinenfabrik Müller-Weingarten Ag | Antrieb für hydraulische Pressen mit hoher Hubzahl |
DE4436666A1 (de) * | 1994-10-13 | 1996-04-18 | Rexroth Mannesmann Gmbh | Hydraulisches Antriebssystem für eine Presse |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011021986A1 (en) * | 2009-08-18 | 2011-02-24 | Demirer Teknolojik Sistemler Sanayi Ticaret Limited Sirketi | Energy saving in hydraulic bending presses |
AT515369B1 (de) * | 2014-02-14 | 2018-03-15 | Thomas Dr Loecher | Anordnung zur Regelung eines hydraulischen Antriebselements |
AT516316B1 (de) * | 2014-09-29 | 2017-11-15 | Bosch Gmbh Robert | Verfahren zur Steuerung einer hydraulisch angetriebenen Maschine |
Also Published As
Publication number | Publication date |
---|---|
DE19831624A1 (de) | 2000-01-20 |
US6370873B1 (en) | 2002-04-16 |
EP0972631B1 (de) | 2003-03-26 |
DE59904695D1 (de) | 2003-04-30 |
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