EP0970803A1 - Hydraulic press - Google Patents

Hydraulic press Download PDF

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Publication number
EP0970803A1
EP0970803A1 EP99890215A EP99890215A EP0970803A1 EP 0970803 A1 EP0970803 A1 EP 0970803A1 EP 99890215 A EP99890215 A EP 99890215A EP 99890215 A EP99890215 A EP 99890215A EP 0970803 A1 EP0970803 A1 EP 0970803A1
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EP
European Patent Office
Prior art keywords
cylinder
lines
hydraulic
control
press
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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.)
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Application number
EP99890215A
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German (de)
French (fr)
Inventor
Norbert Poth
Bernd Walter
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Hoerbiger Hydraulik GmbH
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Hoerbiger Hydraulik GmbH
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Publication of EP0970803A1 publication Critical patent/EP0970803A1/en
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    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure

Definitions

  • the invention relates to a hydraulic press, in particular a press brake, with a lower tool, one through the at least one working cylinder, especially its piston rod, essentially vertically movable Upper beam and control devices, at least part of the hydraulic Control devices in the cylinder bottom and / or the cylinder tube is integrated.
  • the lines are on these cylinders for the hydraulic medium connected by hydraulic control devices, especially the control valves for the workrooms of the Cylinder, going out.
  • a similar construction is also shown in the US PS 4,890,475. With such presses, however, there is a risk that in the case of defective ones Seals or sealing points, especially on the annulus side of the cylinder, a unintentional closing movement by lowering the upper cheek of the press and the workpiece or tool is damaged and the operating personnel at risk.
  • Knitting machines known, among other things one from the piston of the knitting cylinder too actuating control valve, but not the valves controlling the movement, in the knitting cylinder and a pressure oil line in the wall of this cylinder is integrated. Passively regulating the oil flow and the pressure conditions in the system Valves and lines are also on the hold-down device Deep drawing press according to DE 29 35 814 A provided, but not actively Motion control valves. About the exact execution and structure of the hydraulic cylinders themselves are not in the publications mentioned Notes available.
  • the object of the present invention was therefore a hydraulic one Press with increased security level, especially for high forces and for that necessary high pressures in the hydraulic system, at which the risk of injury of people working on the press and damage to the tool and of the workpiece is reduced.
  • This object is achieved in that at least the Housing for the control valves and the lines for the hydraulic medium from and to the working spaces of the working cylinder in the cylinder bottom and / or which are integrated in one piece with this cylinder tube.
  • the number of sealing points and seals is reduced, so that the risk of leaks and thus the escape of hydraulic medium, thus also uncontrollable Movement states are at least largely reduced.
  • the manufacturing and assembly costs are reduced, problems with the transmission of force between the cylinder tube and cylinder base avoided and can advantageously also be sealing points in the sense of the task Avoid between these parts of the working cylinder.
  • control block including Control valves and control lines coming from the external connections is integrated in the cylinder base, which increases the number of Lets reduce areas where leaks can occur. Leaks or breaks in the control lines are also essential Part prevented.
  • Preventing leaks or breaks in the lines for the Hydraulic medium are also the advantage for the further feature of the invention, that the lines for the hydraulic medium from and to the workrooms of the Working cylinders are integrated in the cylinder base and the cylinder barrel.
  • control lines and / or Lines for the hydraulic medium directly from the cylinder bottom or Cylinder tube worked out.
  • the housing for the control valves and / or the control lines and / or the lines for the hydraulic medium at least partially connecting and merge seamlessly into each other are the length of the hydraulic lines and the number of joints to be sealed Minimum reduced and the security of the press against leaks and resulting uncontrolled movements, especially the sinking the upper cheek, optimized.
  • the drawing figure shows a longitudinal section, partly schematically, of Working cylinder A of a hydraulic press, in particular a press brake, on an upper frame section (not shown) of the press is attached and the piston 1 or piston rod the upper cheek of the press (not shown) towards or under the tool moved up.
  • the piston 1 is replaced by a preferably liquid Pressure medium such as hydraulic oil in the housing 2 of the working cylinder A shifted.
  • the housing 2 is preferably designed such that the cylinder bottom and the cylinder tube are made in one piece.
  • the hydraulic oil enters the housing via a pressure connection 2 integrated line 3 and through this line 3 to a schematic illustrated directional valve 4, which for changing direction or for stopping the Piston 1 and thus the upper cheek of the press.
  • a schematic illustrated directional valve 4 which for changing direction or for stopping the Piston 1 and thus the upper cheek of the press.
  • It can be digital or proportional switching directional valve designed and preferably also in the housing 2 integrated switching lines can be supplied.
  • Directional control valve 4 in the drawing as advantageously integrated into the housing 2 is shown, it could also be placed on the outside of the working cylinder his. In the position shown, the directional control valve 4 blocks the inflow of Hydraulic oil in the line 5, which further to the attached to the housing 2 Switching valve 6 leads, which switching valve 6 acts on the annular space 7 around the piston 1 or the piston rod via the preferably in the Cylinder pipe integrated line 8 controls with hydraulic oil.
  • a suction valve 16 is provided, which again to the Cylinder base attached or advantageously in the cylinder housing 2 can be integrated. This suction valve promotes rapid downward movement the upper cheek of the press hydraulic oil from the oil tank 13 to the top of the piston 9 after.
  • the suction valve 16 is preferably by a hydraulic Signal triggered.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

The press as a bottom appliance and a vertically movable top cheek movable by at least one operating cylinder (A), especially its piston rod. At least part of the hydraulic controls (3-6,10-12,14-16) is integrated in the cylinder base and or cylinder pipe (2). At least the housings for the control valves (4,6,15) and the pipes (3,5,8,10-12,14) for the hydraulic medium from and to the operating chambers (7,9) of the operating cylinder are integrated in the cylinder base and or the cylinder pipe.

Description

Die Erfindung betrifft eine hydraulische Presse, insbesondere Abkantpresse, mit einem unteren Werkzeug, einer durch den zumindest einen Arbeitszylinder, insbesondere dessen Kolbenstange, im wesentlichen vertikal bewegbare Oberwange und Steuereinrichtungen, wobei zumindest ein Teil der hydraulischen Steuereinrichtungen in den Zylinderboden und/oder das Zylinderrohr integriert ist.The invention relates to a hydraulic press, in particular a press brake, with a lower tool, one through the at least one working cylinder, especially its piston rod, essentially vertically movable Upper beam and control devices, at least part of the hydraulic Control devices in the cylinder bottom and / or the cylinder tube is integrated.

Eine Presse mit durch Arbeitszylinder bewegbarem Oberwerkzeug ist beispielsweise aus der US-PS 2,484,908 bekannt, wobei die Kolben hier in zwei Zylindern bewegbar aufgenommen sind, welche Zylinder vorzugsweise einstückig mit dem Pressenhaupt ausgeführt sind. An diese Zylinder sind die Leitungen für das Hydraulikmedium angeschlossen, welche von hydraulischen Steuereinrichtungen, insbesonders den Ansteuerventilen für die Arbeitsräume der Zylinder, ausgehen. Eine ähnliche Konstruktion zeigt auch die US-PS 4,890,475. Bei derartigen Pressen besteht aber die Gefahr, daß bei defekten Dichtungen bzw. Dichtstellen, speziell zur Ringraumseite des Zylinders, eine unbeabsichtigte Schließbewegung durch Absinken der Oberwange der Presse erfolgt und das Werkstück oder das Werkzeug beschädigt sowie das Bedienungspersonal gefährdet.A press with an upper die that can be moved by a working cylinder known for example from US-PS 2,484,908, the pistons here in two Cylinders are movably received, which cylinders are preferably made in one piece with the press head. The lines are on these cylinders for the hydraulic medium connected by hydraulic control devices, especially the control valves for the workrooms of the Cylinder, going out. A similar construction is also shown in the US PS 4,890,475. With such presses, however, there is a risk that in the case of defective ones Seals or sealing points, especially on the annulus side of the cylinder, a unintentional closing movement by lowering the upper cheek of the press and the workpiece or tool is damaged and the operating personnel at risk.

Andererseits ist aus der DE 42 08 256 A ein hydraulische Steuereinrichtung für an gänzlich andere Anforderungen angepaßte Messerstern-Teigteil- und Wirkmaschinen bekannt, bei der u.a. ein vom Kolben des Wirkzylinders zu betätigendes Steuerventil, nicht jedoch die die Bewegung steuernden Ventile, in den Wirkzylinder und eine Druckölleitung in die Wandung dieses Zylinders integriert ist. Den Ölfluß und die Druckverhältnisse im System passiv regelnde Ventile und Leitungen sind auch bei der Niederhaltevorrichtung an einer Tiefziehpresse gemäß der DE 29 35 814 A vorgesehen, nicht jedoch aktiv deren Bewegung steuernde Ventile. Über die genaue Ausführung und den Aufbau der hydraulischen Zylinder selbst sind in den genannten Veröffentlichungen keine Hinweise vorhanden. On the other hand, from DE 42 08 256 A is a hydraulic control device for knife star dough pieces and completely adapted to other requirements Knitting machines known, among other things one from the piston of the knitting cylinder too actuating control valve, but not the valves controlling the movement, in the knitting cylinder and a pressure oil line in the wall of this cylinder is integrated. Passively regulating the oil flow and the pressure conditions in the system Valves and lines are also on the hold-down device Deep drawing press according to DE 29 35 814 A provided, but not actively Motion control valves. About the exact execution and structure of the hydraulic cylinders themselves are not in the publications mentioned Notes available.

Die Aufgabe der vorliegenden Erfindung war daher eine hydraulische Presse mit erhöhter Sicherheitsstufe, insbesondere für hohe Kräfte und dafür notwendige hohe Drücke im Hydrauliksystem, bei der die Gefahr der Verletzung der an der Presse arbeitenden Menschen und der Beschädigung des Werkzeugs und des Werkstücks vermindert ist.The object of the present invention was therefore a hydraulic one Press with increased security level, especially for high forces and for that necessary high pressures in the hydraulic system, at which the risk of injury of people working on the press and damage to the tool and of the workpiece is reduced.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zumindest die Gehäuse für die Steuerventile und die Leitungen für das Hydraulikmedium von und zu den Arbeitsräumen des Arbeitszylinders in den Zylinderboden und/oder das einstückig mit diesem ausgeführte Zylinderrohr integriert sind. Damit wird die Anzahl der Dichtstellen und Dichtungen vermindert, so daß die Gefahr von Leckagen und damit des Austretens von Hydraulikmedium, somit auch unkontrollierbare Bewegungszustände, zumindest weitestgehend reduziert sind. Aufgrund des einstückig mit dem Zylinderrohr ausgebilden Zylinderbodens ist einerseits der Fertigungs- und Montageaufwand verringert, sind Probleme mit der Kraftübertragung zwischen Zylinderrohr und Zylinderboden vermieden und läßt ist in vorteilhafterweise im Sinne der Aufgabenstellung auch Dichtstellen zwischen diese Teilen des Arbeitszylinders vermeiden.This object is achieved in that at least the Housing for the control valves and the lines for the hydraulic medium from and to the working spaces of the working cylinder in the cylinder bottom and / or which are integrated in one piece with this cylinder tube. In order to the number of sealing points and seals is reduced, so that the risk of leaks and thus the escape of hydraulic medium, thus also uncontrollable Movement states are at least largely reduced. Because of the cylinder bottom formed in one piece with the cylinder tube on the one hand, the manufacturing and assembly costs are reduced, problems with the transmission of force between the cylinder tube and cylinder base avoided and can advantageously also be sealing points in the sense of the task Avoid between these parts of the working cylinder.

Vorzugsweise ist dabei vorgesehen, daß der komplette Steuerblock einschließlich Steuerventilen und von den externen Anschlüssen kommende Steuerleitungen in den Zylinderboden integriert ist, wodurch sich die Anzahl der Stellen weiter reduzieren läßt, an denen Undichtigkeiten auftreten können. Auch Leckagen oder Brüche in den Steuerleitungen sind dabei zu einem wesentlichen Teil verhindert.It is preferably provided that the complete control block including Control valves and control lines coming from the external connections is integrated in the cylinder base, which increases the number of Lets reduce areas where leaks can occur. Leaks or breaks in the control lines are also essential Part prevented.

Die Verhinderung von Leckagen oder Brüchen in den Leitungen für das Hydraulikmedium sind auch der Vorteil für das weitere Merkmal der Erfindung, daß die Leitungen für das Hydraulikmedium von und zu den Arbeitsräumen des Arbeitszylinders in den Zylinderboden und das Zylinderrohr integriert sind.Preventing leaks or breaks in the lines for the Hydraulic medium are also the advantage for the further feature of the invention, that the lines for the hydraulic medium from and to the workrooms of the Working cylinders are integrated in the cylinder base and the cylinder barrel.

Um die Länge der Leitungen für das Hydraulikmedium so gering als möglich zu halten und damit die Stellen für Undichtigkeiten zu verringern, sind gemäß einem vorteilhaften Ausführungsbeispiel die Steuerleitungen und/oder die Leitungen für das Hydraulikmedium direkt aus dem Zylinderboden bzw. dem Zylinderrohr herausgearbeitet.To keep the length of the lines for the hydraulic medium as small as possible hold and thus reduce the number of leaks are according to an advantageous embodiment, the control lines and / or Lines for the hydraulic medium directly from the cylinder bottom or Cylinder tube worked out.

Wenn die Gehäuse für die Steuerventile und/oder die Steuerleitungen und/oder die Leitungen für das Hydraulikmedium zumindest teilweise verbindungs- und dichtungslos ineinander übergehen, sind die Länge der Hydraulikleitungen und die Anzahl der abzudichtenden Verbindungsstellen auf ein Minimum reduziert und die Sicherheit der Presse gegen Undichtigkeiten und daraus resultierende unkontrollierte Bewegungen, insbesondere das Absinken der Oberwange, optimiert.If the housing for the control valves and / or the control lines and / or the lines for the hydraulic medium at least partially connecting and merge seamlessly into each other are the length of the hydraulic lines and the number of joints to be sealed Minimum reduced and the security of the press against leaks and resulting uncontrolled movements, especially the sinking the upper cheek, optimized.

In der nachfolgenden Beschreibung soll die Erfindung anhand eines auch in der Zeichnungsfigur dargestellten bevorzugten Ausführungsbeispieles eines erfindungsgemäßen Arbeitszylinders für eine hydraulische Presse näher erläutert werden.In the description below, the invention is also intended to be based on one in the drawing figure preferred embodiment of a Working cylinder according to the invention for a hydraulic press explained in more detail become.

Die Zeichnungsfigur zeigt einen Längsschnitt, teilweise schematisch, des Arbeitszylinders A einer hydraulischen Presse, insbesondere einer Abkantpresse, der an einem oberen Rahmenabschnitt (nicht dargestellt) der Presse befestigt ist und dessen Kolben 1 oder Kolbenstange die Oberwange der Presse (nicht dargestellt) auf das unter Werkzeug hin oder von diesem Werkzeug weg nach oben bewegt. Dabei wird der Kolben 1 durch ein vorzugsweise flüssiges Druckmedium wie etwa Hydrauliköl im Gehäuse 2 des Arbeitszylinders A verschoben. Das Gehäuse 2 ist vorzugsweise derart ausgeführt, daß der Zylinderboden und das Zylinderrohr einstückig angefertigt sind.The drawing figure shows a longitudinal section, partly schematically, of Working cylinder A of a hydraulic press, in particular a press brake, on an upper frame section (not shown) of the press is attached and the piston 1 or piston rod the upper cheek of the press (not shown) towards or under the tool moved up. The piston 1 is replaced by a preferably liquid Pressure medium such as hydraulic oil in the housing 2 of the working cylinder A shifted. The housing 2 is preferably designed such that the cylinder bottom and the cylinder tube are made in one piece.

Das Hydrauliköl gelangt über einen Druckanschluß in eine in das Gehäuse 2 integrierte Leitung 3 und durch diese Leitung 3 zu einem schematisch dargestellten Wegeventil 4, das zur Richtungsänderung bzw. zum Anhalten des Kolbens 1 und damit der Oberwange der Presse dient. Es kann als digital oder proportional schaltendes Wegeventil ausgelegt und vorzugsweise über ebenfalls in das Gehäuse 2 integrierte Schaltleitungen versorgt sein. Obgleich das Wegeventil 4 in der Zeichnung als in das Gehäuse 2 vorteilhafterweise integriert dargestellt ist, könnte es auch auf den Arbeitszylinder außen aufgesetzt sein. In der gezeigten Stellung sperrt das Wegeventil 4 den Zufluß von Hydrauliköl in die Leitung 5, welche weiter zum an das Gehäuse 2 angebaute Schaltventil 6 führt, welches Schaltventil 6 die Beaufschlagung des Ringraumes 7 um den Kolben 1 bzw. die Kolbenstange über die vorzugsweise in das Zylinderrohr integrierte Leitung 8 mit Hydrauliköl steuert. Durch diese interne Führung der Leitung 8 in der Wandung des Zylinderrohres ist die Gefahr des Bruches der Leitung und allfälliger Undichtheiten an Verbindungsstellen der Leitung 8 mit Ventilen oder anderen Anschlüssen und damit auch die Gefahr des ungewollten Ausfahrens des Kolbens und Schließens der Presse mit Gefährdung des Bedienungspersonals verhindert. Beim vorzugsweise als Sitzventil ausgeführten Schaltventil 6 besteht auch die Möglichkeit eine elektrische Stellungsüberwachung für den Schaltkolben vorzusehen.The hydraulic oil enters the housing via a pressure connection 2 integrated line 3 and through this line 3 to a schematic illustrated directional valve 4, which for changing direction or for stopping the Piston 1 and thus the upper cheek of the press. It can be digital or proportional switching directional valve designed and preferably also in the housing 2 integrated switching lines can be supplied. Although that Directional control valve 4 in the drawing as advantageously integrated into the housing 2 is shown, it could also be placed on the outside of the working cylinder his. In the position shown, the directional control valve 4 blocks the inflow of Hydraulic oil in the line 5, which further to the attached to the housing 2 Switching valve 6 leads, which switching valve 6 acts on the annular space 7 around the piston 1 or the piston rod via the preferably in the Cylinder pipe integrated line 8 controls with hydraulic oil. Through this internal guidance of the line 8 in the wall of the cylinder tube is the Danger of line breakage and possible leaks at connection points the line 8 with valves or other connections and thus also the danger of unintentional extension of the piston and closing of the press prevented at risk to the operating personnel. When preferably as Seat valve designed switching valve 6 is also possible electrical position monitoring for the switching piston.

Dagegen kann Hydraulikmedium von der Kolbenoberseite 9 über die Leitung 10, eine vorzugsweise gedrosselte Ventilöffnung im Wegeventil 4 und weiter über eine von der Leitung 10 abzweigende Leitung 11 in den drucklos gehaltenen Sauganschluß 12 und von dort weiter in den Öltank gepreßt werden. Alle besagten Leitungen 10 bis 12 sind vorzugsweise in den Zylinderboden integriert und auch das Schaltventil 6 könnte vorteilhafterweise direkt in den Zylinderboden oder auch das Zylinderrohr eingebaut sein.In contrast, hydraulic medium from the piston top 9 via the line 10, a preferably throttled valve opening in the directional valve 4 and on Via a line 11 branching off from line 10 into the line which is kept depressurized Suction port 12 and from there to be pressed into the oil tank. All said lines 10 to 12 are preferably integrated in the cylinder bottom and the switching valve 6 could advantageously directly in the Cylinder base or the cylinder tube can be installed.

Von der Leitung 5 zum Schaltventil 6 zweigt vor diesem Schaltventil 6 eine weitere Leitung 14, vorzugsweise mit Drosselstelle, ab und mündet hinter dem Schaltventil 6 wieder in die Leitung 8 zum Ringraum 7, in welcher Leitung ein einstellbares Druckventil 15 vorgesehen ist, durch welches der zum Halten des Kolbens 1 mit der Oberwange notwendige Druck eingestellt werden kann. Das Druckventil 15 ist, ebenso wie das Schaltventil 6, ein in Grundstellung absolut dichtes Ventil, und beide Ventile 6 und 15 halten in Zusammenarbeit den Kolben 1 in der jeweiligen Position. From line 5 to switching valve 6 branches in front of this switching valve 6 a further line 14, preferably with a throttle point, and opens behind the switching valve 6 again in line 8 to the annular space 7, in which line an adjustable pressure valve 15 is provided, through which to hold of the piston 1 with the upper beam necessary pressure can be adjusted. The Pressure valve 15, like the switching valve 6, is in the basic position absolutely tight valve, and both valves 6 and 15 work together the piston 1 in the respective position.

Zwischen dem drucklosen Sauganschluß 12 und der Leitung 10 zur Kolbenoberseite 9 ist noch ein Nachsaugventil 16 vorgesehen, das wieder an den Zylinderboden angebaut oder aber vorteilhafterweise in das Zylindergehäuse 2 integriert sein kann. Dieses Nachsaugventil fördert bei schnellem Abwärtsbewegen der Oberwange der Presse Hydrauliköl aus dem Öltank 13 an die Kolbenoberseite 9 nach. Das Nachsaugventil 16 wird vorzugsweise durch ein hydraulisches Signal angesteuert.Between the unpressurized suction port 12 and the line 10 to the top of the piston 9 is a suction valve 16 is provided, which again to the Cylinder base attached or advantageously in the cylinder housing 2 can be integrated. This suction valve promotes rapid downward movement the upper cheek of the press hydraulic oil from the oil tank 13 to the top of the piston 9 after. The suction valve 16 is preferably by a hydraulic Signal triggered.

Claims (4)

Hydraulische Presse, insbesondere Abkantpresse, mit einem unteren Werkzeug, einer durch den zumindest einen Arbeitszylinder, insbesondere dessen Kolbenstange, im wesentlichen vertikal bewegbare Oberwange und Steuereinrichtungen, wobei zumindest ein Teil der hydraulischen Steuereinrichtungen (3-6, 10-12, 14-16) in den Zylinderboden und/oder das Zylinderrohr (2) integriert ist, dadurch gekennzeichnet, daß zumindest die Gehäuse für die Steuerventile (4, 6, 15) und die Leitungen (3, 5, 8, 10-12, 14) für das Hydraulikmedium von und zu den Arbeitsräumen (7, 9) des Arbeitszylinders (A) in den Zylinderboden und/oder das einstückig mit diesem ausgeführte Zylinderrohr (2) integriert sind.Hydraulic press, in particular press brake, with a lower tool, one through the at least one working cylinder, in particular whose piston rod, essentially vertically movable upper cheek and Control devices, at least part of the hydraulic control devices (3-6, 10-12, 14-16) in the cylinder bottom and / or that Cylinder tube (2) is integrated, characterized in that at least the housings for the control valves (4, 6, 15) and the lines (3, 5, 8, 10-12, 14) for the hydraulic medium from and to the work rooms (7, 9) of the working cylinder (A) in the cylinder bottom and / or in one piece with this cylinder tube (2) are integrated. Presse nach Anspruch 1, dadurch gekennzeichnet, daß der komplette Steuerblock einschließlich Steuerventilen (4, 6, 15) und von den externen Anschlüssen kommende Steuerleitungen in den Zylinderboden (2) integriert ist.Press according to claim 1, characterized in that the complete Control block including control valves (4, 6, 15) and from the external Control cables coming into the cylinder base (2) is integrated. Presse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Steuerleitungen und/oder die Leitungen (3, 5, 8, 10-12, 14) für das Hydraulikmedium direkt aus dem Zylinderboden bzw. dem Zylinderrohr (2) herausgearbeitet sind.Press according to claim 1 or 2, characterized in that the control lines and / or the lines (3, 5, 8, 10-12, 14) for the hydraulic medium worked directly out of the cylinder base or cylinder tube (2) are. Presse nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Gehäuse für die Steuerventile (4, 6, 15) und/oder die Steuerleitungen und/oder die Leitungen (3, 5, 8, 10-12, 14) für das Hydraulikmedium zumindest teilweise verbindungs- und dichtungslos ineinander übergehen.Press according to at least one of the preceding claims, characterized characterized in that the housing for the control valves (4, 6, 15) and / or the control lines and / or the lines (3, 5, 8, 10-12, 14) for the hydraulic medium at least partially without connection and seal merge.
EP99890215A 1998-07-08 1999-06-30 Hydraulic press Withdrawn EP0970803A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT45698U AT3110U1 (en) 1998-07-08 1998-07-08 HYDRAULIC PRESS
AT45698 1998-07-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027507A1 (en) * 2001-08-29 2003-04-03 Bosch Rexroth Ag Hydraulic cylinder comprising valves
DE10152414B4 (en) * 2001-08-29 2013-01-17 Bosch Rexroth Aktiengesellschaft hydraulic cylinders
CN109261381A (en) * 2018-11-20 2019-01-25 中国工程物理研究院总体工程研究所 A kind of pipelining structure applied to high speed geotechnical centrifuge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR911076A (en) * 1944-12-28 1946-06-27 Press and its application as a molding machine, under pressure, of plastics
FR2174731A1 (en) * 1972-03-09 1973-10-19 Foley Ronald
DE2935814A1 (en) * 1979-09-05 1981-03-26 Hermann Etscheid oHG, 53577 Neustadt Hydraulic holding down device for deep drawing press - has spring loaded reducing valve to accommodate changes in viscosity
FR2528503A1 (en) * 1982-06-11 1983-12-16 Gewerk Eisenhuette Westfalia HYDRAULIC CYLINDER
DE4208256A1 (en) * 1992-03-14 1993-09-16 Guenter Richter Dough working appts. - has hydraulic control for automatic operation of dough blade dividing and working appts. with integrated cylinder and control block
DE4304721A1 (en) * 1993-02-17 1994-08-18 Rexroth Mannesmann Gmbh Hydraulically operated machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR911076A (en) * 1944-12-28 1946-06-27 Press and its application as a molding machine, under pressure, of plastics
FR2174731A1 (en) * 1972-03-09 1973-10-19 Foley Ronald
DE2935814A1 (en) * 1979-09-05 1981-03-26 Hermann Etscheid oHG, 53577 Neustadt Hydraulic holding down device for deep drawing press - has spring loaded reducing valve to accommodate changes in viscosity
FR2528503A1 (en) * 1982-06-11 1983-12-16 Gewerk Eisenhuette Westfalia HYDRAULIC CYLINDER
DE4208256A1 (en) * 1992-03-14 1993-09-16 Guenter Richter Dough working appts. - has hydraulic control for automatic operation of dough blade dividing and working appts. with integrated cylinder and control block
DE4304721A1 (en) * 1993-02-17 1994-08-18 Rexroth Mannesmann Gmbh Hydraulically operated machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003027507A1 (en) * 2001-08-29 2003-04-03 Bosch Rexroth Ag Hydraulic cylinder comprising valves
US7156013B2 (en) 2001-08-29 2007-01-02 Bosch Rexroth Ag Hydraulic cylinder comprising valves
DE10152414B4 (en) * 2001-08-29 2013-01-17 Bosch Rexroth Aktiengesellschaft hydraulic cylinders
CN109261381A (en) * 2018-11-20 2019-01-25 中国工程物理研究院总体工程研究所 A kind of pipelining structure applied to high speed geotechnical centrifuge
CN109261381B (en) * 2018-11-20 2024-01-30 中国工程物理研究院总体工程研究所 Pipeline laying structure applied to high-speed geotechnical centrifuge

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