EP1526930B1 - Main cylinder or press cylinder of an extrusion/ tube extrusion press - Google Patents

Main cylinder or press cylinder of an extrusion/ tube extrusion press Download PDF

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Publication number
EP1526930B1
EP1526930B1 EP03778235A EP03778235A EP1526930B1 EP 1526930 B1 EP1526930 B1 EP 1526930B1 EP 03778235 A EP03778235 A EP 03778235A EP 03778235 A EP03778235 A EP 03778235A EP 1526930 B1 EP1526930 B1 EP 1526930B1
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EP
European Patent Office
Prior art keywords
cylinder
rod
plunger
tube
press
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EP03778235A
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German (de)
French (fr)
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EP1526930A1 (en
Inventor
Uwe Muschalik
Karl Hermann Claasen
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SMS Group GmbH
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SMS Eumuco GmbH
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    • 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
    • B30B1/323—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 using low pressure long stroke opening and closing means, and high pressure short stroke cylinder means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/21—Presses specially adapted for extruding metal
    • B21C23/211—Press driving devices

Definitions

  • the invention relates to a tube and extruder with a main or pressing cylinder, which is arranged in a cylinder spar and has in its cylinder housing a connected to a projecting rod of the cylinder housing plunger.
  • a tube and extruder, designed as a frameless metal extruder, in which the rods of the plunger are designed as piston rods, which take the place of the tie rods or columns in the usual frame design, by being connected to the counter-spar, with two such Haupt- or pressing cylinder is through the DE 198 35 717 A1 known.
  • the master cylinder are therefore formed with approximately equal displacement on both sides of the Hauptpreßkolben and switchable connections of the two-sided cylinder subspaces.
  • the plunger of the cylinder held by the hollow cylinder press cylinder are subjected, for which extend the piston rods of the plunger into the barrel spar and are connected thereto.
  • the plungers with their piston rods are hollow drilled over part of their length to cylinder bores, plunge into the plunger, which are supported on the cylinder-closing lids.
  • the plungers can be returned to the starting position with them via the piston rods of the strut.
  • more piston-cylinder units are also supported in order to move the spar in idle / rapid traverse can.
  • the counter-spar are preceded by numerous components, in particular the protruding master cylinder with its piston rods as a connection to the strut. This limits the working range of a metal extrusion press, especially if no straight extruded profiles, but those with curvatures or radii in different directions to be produced (see. EP 0 706 843 B1 ).
  • the invention is therefore an object of the invention to provide a main or pressure cylinder of the type mentioned, while allowing a short circuit technology for rapid movement in a simpler manner, a rapid transition of the pressure oil from one to another room, while reducing the construction costs and in particular allows a press construction, which provides a sufficiently large space in front of the counter-spar in order to produce strand products with radii or bends unhindered can.
  • the filling space of the surge tank is also connected to a tank line, and that further preferably in the leading from the filling chamber to the cylinder chamber behind the plunger, formed in the cylinder housing bottom connecting lines switchable check valves are arranged.
  • open check valves four of which are available, designed as two-way cartridge valves, which are also known as logic or cartridge valves, from which from the filling of the Equalizing tank supplied oil is lapped.
  • a cylinder spar 2 is shown attached to it with its cylinder housing 3 main or press cylinder 4.
  • the cylinder spar 2 is in the direction of drawing to the left seen with a tool (pressure plate, die holder and die) stocked counter-spar - not shown - opposite.
  • a plunger 5 is arranged, which is provided at its front end in the pressing direction 6 immediately with a ram 7, which presses upon loading of the plunger 5 a previously loaded in a pickup block by the tool of the counterstay (not shown).
  • the rod 9 is formed with an integrated forward and retraction cylinder 12.
  • a sabot 15 and a concentrically enclosing this enclosing an annular gap 16 shell housing 17 is fixed, the latter in turn with the inner wall of the hollow bore 13 defines a pressure chamber 18.
  • the immersed in the axial hollow bore 13 of the rod 9 ends of the jacket housing 17 and the sword tube 15 are designed as sealed against the inner wall of the hollow bore 13 radial collar 19 and the annular gap 16 sealing head thickening 20.
  • a pressure chamber 18 sealing pack 21 which slides on lifting motions of the plunger 5 on the jacket housing 17, screwed to the rod 9.
  • holes 22 are incorporated into the radial collar 19 of the shell.
  • the hydraulic connection block 14 has an opening into the sear tube 15 and an opening into the annular gap 16 line connection 23 and 24, which are connected via lines 25 and 26 to a not shown oil supply and conventional hydraulic unit.
  • a pressure oil line 27 from an oil supply oil in the cylinder chamber 28 behind the plunger 5 and at the same time via the line 25 and the port 23 in the rapier tube 15, so that this additional amount of oil in a before the radial collar 19 and the head thickening 20 lying pressure chamber 29 of the hollow bore 13 of the rod 9 passes and supports the forward stroke.
  • the oil supply is blocked via the line 25 to the rapier tube 15 and the working pressure applied only via the pressure oil line 27.
  • the embodiment of the drawing also shows that the trained with the integrated forward and retraction cylinder 12 rod 9 is further combined with a bolted to the cylinder housing bottom 8 reservoir 30. This is closed at its rear end by a fixed to the rod 9 slide 31, the lateral surface sealed slides during strokes on the container inner wall.
  • the hydraulic connection block 14 for the integrated forward and retraction cylinder 12 of the rod 9 is screwed here with a bell 32, which in turn is screwed to the end face of the surge tank 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
  • Extrusion Of Metal (AREA)
  • Electric Cable Installation (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The cylinder has a press piston with projecting rod. The rod (9) has an integrated advance and retraction cylinder (12). It has an axial hollow bore (13), which forms a pressure chamber (18) and contains a tube (15). The tube is concentrically enclosed by a jacket housing (17), so that a ring gap (16) is formed, which is in flow connection with the pressure chamber. A tube end projecting from the housing is together with the housing, fastened to a hydraulics connection block (14). This has a pipe connection (23,24) opening into the tube and the ring gap.

Description

Die Erfindung betrifft eine Rohr- und Strangpresse mit einem Haupt- bzw. Presszylinder, der in einem Zylinderholm angeordnet ist und in seinem Zylindergehäuse einen mit einer aus dem Zylindergehäuse vorkragenden Stange verbundenen Preßkolben aufweist.The invention relates to a tube and extruder with a main or pressing cylinder, which is arranged in a cylinder spar and has in its cylinder housing a connected to a projecting rod of the cylinder housing plunger.

Eine Rohr- und Strangpresse, ausgeführt als rahmenlose Metallstrangpresse, bei der die Stangen des Preßkolbens als Kolbenstangen ausgebildet sind, die an die Stelle der Zuganker bzw. Säulen bei der üblichen Rahmenbauart treten, indem sie mit dem Gegenholm verbunden sind, mit zwei solcher Haupt- bzw. Preßzylinder ist durch die DE 198 35 717 A1 bekanntgeworden. Um einen hohen Nutzungsgrad zu erreichen und die Nebenzeiten zu minimieren, werden Leerlauf und Rückzug mit möglichst großer Geschwindigkeit gefahren, wobei große Volumenströme bewältigt werden müssen. Die Hauptzylinder sind deshalb mit etwa gleich großen Hubvolumen zu beiden Seiten der Hauptpreßkolben und schaltbaren Verbindungen der beidseitigen Zylinder-Teilräume ausgebildet.A tube and extruder, designed as a frameless metal extruder, in which the rods of the plunger are designed as piston rods, which take the place of the tie rods or columns in the usual frame design, by being connected to the counter-spar, with two such Haupt- or pressing cylinder is through the DE 198 35 717 A1 known. In order to achieve a high degree of utilization and to minimize idle times, idling and retreat are driven at the highest possible speed, whereby large volume flows have to be mastered. The master cylinder are therefore formed with approximately equal displacement on both sides of the Hauptpreßkolben and switchable connections of the two-sided cylinder subspaces.

Zum Verpressen eines Blockes werden die Preßkolben der von dem Zylinderholm gehaltenen Preßzylinder beaufschlagt, wozu die Kolbenstangen der Preßkolben bis in den Laufholm reichen und mit diesem verbunden sind. Die Preßkolben mit ihren Kolbenstangen sind über einen Teil ihrer Länge hohl gebohrt zu Zylinderbohrungen, in die Plungerkolben eintauchen, die sich an die Zylinder abschließenden Deckeln abstützen. Bei Beaufschlagung der Plungerkolben lassen sich die Preßkolben und mit ihnen über die Kolbenstangen der Laufholm in die Ausgangsstellung zurückfahren. Am Grundrahmen dieser Presse sind außerdem weitere Kolben-Zylinder-Einheiten abgestützt, um den Laufholm im Leerhub/Eilgang verfahren zu können.For pressing a block, the plunger of the cylinder held by the hollow cylinder press cylinder are subjected, for which extend the piston rods of the plunger into the barrel spar and are connected thereto. The plungers with their piston rods are hollow drilled over part of their length to cylinder bores, plunge into the plunger, which are supported on the cylinder-closing lids. When the plunger is acted upon, the plungers can be returned to the starting position with them via the piston rods of the strut. On the base frame of this press, more piston-cylinder units are also supported in order to move the spar in idle / rapid traverse can.

Abgesehen davon, daß diese Metallstrangpresse einen gewissen Aufwand erfordert, sind dem Gegenholm zahlreiche Bauteile vorgelagert, insbesondere die vorstehenden Hauptzylinder mit ihren Kolbenstangen als Verbindung zum Laufholm. Das schränkt den Arbeitsbereich einer Metallstrangpresse vor allem dann ein, wenn keine geraden Strangpreßprofile, sondern solche mit Krümmungen bzw. Radien in verschiedenen Richtungen hergestellt werden sollen (vgl. EP 0 706 843 B1 ).Apart from the fact that this metal extruder requires a certain effort, the counter-spar are preceded by numerous components, in particular the protruding master cylinder with its piston rods as a connection to the strut. This limits the working range of a metal extrusion press, especially if no straight extruded profiles, but those with curvatures or radii in different directions to be produced (see. EP 0 706 843 B1 ).

Der Erfindung liegt daher die Aufgabe zugrunde, einen Haupt- bzw. Preßzylinder der eingangs genannten Art zu schaffen, der unter Beibehaltung einer Kurzschlußleitungstechnik zur Eilbewegung in einfacherer Weise einen schnellen Übergang des Drucköls von einen in einen anderen Raum ermöglicht, dabei gleichzeitig den Bauaufwand verringert und insbesondere eine Pressenbauweise erlaubt, die vor dem Gegenholm einen ausreichend großen Freiraum bietet, um auch Strangprodukte mit Radien bzw. Krümmungen ungehindert herstellen zu können.The invention is therefore an object of the invention to provide a main or pressure cylinder of the type mentioned, while allowing a short circuit technology for rapid movement in a simpler manner, a rapid transition of the pressure oil from one to another room, while reducing the construction costs and in particular allows a press construction, which provides a sufficiently large space in front of the counter-spar in order to produce strand products with radii or bends unhindered can.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das frei vorkragende Ende der Stange von einem am Hauptzylindergehäuse befestigten Ausgleichsbehälter umschlossen ist, in dem bei Druckbeaufschlagung des Preßkolbens ein gegen die Behälterinnenwandung abgedichteter, auf dem vom Hauptzylindergehäuse entfernten Stangenende angeordneter Schieber gleitet, wobei der zwischen der Stange und dem Ausgleichsbehälter ausgebildete, von dem Schieber endseitig abgeschlossene Füllraum über Verbindungsleitungen an den hinter dem Preßkolben liegenden Zylinderraum des Hauptzylindergehäuses angeschlossen ist, in den auch eine Druckölleitung mündet.This object is achieved in that the freely projecting end of the rod is enclosed by a mounted on the master cylinder housing expansion tank in which when pressurized the plunger against the container inner wall sealed slide on the remote from the master cylinder housing rod end slide, wherein the between the rod and the expansion tank formed, closed by the slide end filling space is connected via connecting lines to the cylinder located behind the plunger cylinder space of the master cylinder housing into which also opens a pressure oil line.

Es ist hierbei vorteilhaft vorgesehen, daß der Füllraum des Ausgleichsbehälters außerdem an eine Tankleitung angeschlossen ist, und daß weiterhin vorzugsweise in den vom Füllraum zu dem Zylinderraum hinter dem Preßkolben führenden, im Zylindergehäuseboden ausgebildeten Verbindungsleitungen schaltbare Sperrventile angeordnet sind. Hiermit läßt sich erreichen, daß zum Vorschub des Preßkolbens in seine Arbeitsposition dieser bei geöffneten Sperrventilen, von denen vier vorhanden sind, ausgeführt als Zwei-Wege-Einbauventile, die auch als Logik- oder Cartridge-Ventile bekannt sind, von dem aus dem Füllraum des Ausgleichsbehälters zugeführten Öl umspült wird. Wenn der Preßkolben, der einen gleichen Durchmesser wie der Ausgleichsbehälter besitzt, seine Arbeitsposition erreicht hat und mit dem Preßvorgang beginnt, werden die Verbindungsleitungen über die Sperrventile geschlossen, so daß der Schieber die in dem Ausgleichsbehälter verbleibende Ölmenge nur noch in den Tank drückt, während die anschließende Beaufschlagung mit Drucköl, das folglich nicht nachgesaugt werden muß, so daß der Tank weit entfernt sein kann, nur noch über die Druckölleitung erfolgt. Hierzu sind keine großen Querschnitte der Ölleitungen mehr erforderlich, wie es ohne den Ausgleichsbehälter der Fall wäre. Bei Beendigung des Preßhubes und der dann bei entsprechender Umsteuerung der Hydraulikeinheit eingeleiteten Rückwärtsbewegung des Preßkolbens in seine Ausgangslage im Zylindergehäuse strömt das Öl dann wieder zurück in den Ausgleichszylinder, d.h. das Öl wird im Betrieb der Rohr- und Strangpresse unter Druck hin und her geschoben.It is advantageously provided that the filling space of the surge tank is also connected to a tank line, and that further preferably in the leading from the filling chamber to the cylinder chamber behind the plunger, formed in the cylinder housing bottom connecting lines switchable check valves are arranged. Hereby can be achieved that for advancing the plunger into its working position with open check valves, four of which are available, designed as two-way cartridge valves, which are also known as logic or cartridge valves, from which from the filling of the Equalizing tank supplied oil is lapped. When the plunger, which has a same diameter as the surge tank, has reached its working position and begins the pressing operation, the connecting lines are closed via the check valves, so that the slide remaining in the surge tank Oil only pushes into the tank, while the subsequent application of pressurized oil, which consequently does not need to be sucked, so that the tank can be far away, takes place only on the pressure oil line. For this purpose, no large cross-sections of the oil lines longer required, as would be the case without the surge tank. Upon completion of the Preßhubes and then initiated with appropriate reversal of the hydraulic unit backward movement of the plunger into its initial position in the cylinder housing, the oil then flows back into the balancing cylinder, ie the oil is pushed under pressure back and forth during operation of the tube and extruder.

Weitere Merkmale und Einzelheiten der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung eines in der einzigen Zeichnungs-Figur in einer Bauweise mit um einer Preßkolbenstange umbauten Ausgleichsbehälter und in der Stange integrierten Vor- und Rückzugzylinder dargestellten Ausführungsbeispiels der Erfindung.Further features and details of the invention will become apparent from the claims and the following description of an embodiment in the single drawing figure in a construction with a Preßkolbenstange converted reservoir and integrated in the rod front and return cylinder embodiment of the invention.

Von einer als Draufsicht im Schnitt dargestellten Strangpresse 1, ausgeführt in Horizontal-Bauweise, ist in der Figur lediglich ein Zylinderholm 2 mit daran über sein Zylindergehäuse 3 befestigten Haupt- bzw. Preßzylinder 4 gezeigt. Dem Zylinderholm 2 liegt in Zeichnungsrichtung nach links gesehen ein mit einem Werkzeug (Druckplatte, Matrizenhalter und Matrize) bestückter Gegenholm - nicht dargestellt - gegenüber. Im Zylindergehäuse 3 ist ein Preßkolben 5 angeordnet, der an seinem in Preßrichtung 6 vorderen Ende sogleich mit einem Preßstempel 7 versehen ist, der bei Beaufschlagung des Preßkolbens 5 einen zuvor in einen Aufnehmer geladenen Block durch das Werkzeug des Gegenholms verpreßt (nicht dargestellt). Am anderen, rückwärtigen Ende des Preßkolbens 5 ist eine sich durch den Zylindergehäuseboden 8 von dem Zylinderholm 2 nach hinten weg erstreckende Stange 9 angeschraubt. Die aus dem Preßkolben 5 und der Stange 9 bestehende Baueinheit wird bestimmt geführt, nämlich in einer ersten Führung 10 für den Preßkolben 5 am vorderen Ende im Zylindergehäuse 3 und einer zweiten Führung 11 für die Kolbenstange 9 im Zylindergehäuseboden 8.From an extruder 1, shown as a top view in section, executed in horizontal construction, in the figure, only a cylinder spar 2 is shown attached to it with its cylinder housing 3 main or press cylinder 4. The cylinder spar 2 is in the direction of drawing to the left seen with a tool (pressure plate, die holder and die) stocked counter-spar - not shown - opposite. In the cylinder housing 3, a plunger 5 is arranged, which is provided at its front end in the pressing direction 6 immediately with a ram 7, which presses upon loading of the plunger 5 a previously loaded in a pickup block by the tool of the counterstay (not shown). At the other, rear end of the plunger 5 is a through the cylinder housing bottom 8 of the cylinder spar 2 rearwardly extending rod 9 screwed. The consisting of the plunger 5 and the rod 9 assembly is determined guided, namely in a first guide 10 for the plunger 5 at the front end in the cylinder housing 3 and a second guide 11 for the piston rod 9 in the cylinder housing bottom. 8

Die Stange 9 ist mit einem integrierten Vor- und Rückzugzylinder 12 ausgebildet. Hierzu sind in einer axialen Hohlbohrung 13 ein in einem stationären Hydraulik-Anschlußblock 14 ein Degenrohr 15 und ein dieses konzentrisch unter Einschluß eines Ringspaltes 16 umschließendes Mantelgehäuse 17 festgelegt, wobei letzteres wiederum mit der Innenwandung der Hohlbohrung 13 einen Druckraum 18 definiert. Die in die axiale Hohlbohrung 13 der Stange 9 eintauchenden Enden des Mantelgehäuses 17 und des Degenrohres 15 sind als gegen die Innenwandung der Hohlbohrung 13 abgedichteter Radialkragen 19 bzw. den Ringspalt 16 abdichtende Kopfverdickung 20 ausgeführt. Am hinteren, freien Ende ist eine den Druckraum 18 abdichtende Packung 21, die bei Hubbewegungen des Preßkolbens 5 auf dem Mantelgehäuse 17 gleitet, an die Stange 9 angeschraubt. Zur strömungstechnischen Verbindung des Druckraumes 18 mit dem Ringspalt 16 sind in den Radialkragen 19 des Mantelgehäuses 17 Bohrungen 22 eingearbeitet.The rod 9 is formed with an integrated forward and retraction cylinder 12. For this purpose, in a hollow axial bore 13 a in a stationary hydraulic connection block 14, a sabot 15 and a concentrically enclosing this enclosing an annular gap 16 shell housing 17 is fixed, the latter in turn with the inner wall of the hollow bore 13 defines a pressure chamber 18. The immersed in the axial hollow bore 13 of the rod 9 ends of the jacket housing 17 and the sword tube 15 are designed as sealed against the inner wall of the hollow bore 13 radial collar 19 and the annular gap 16 sealing head thickening 20. At the rear, free end is a pressure chamber 18 sealing pack 21, which slides on lifting motions of the plunger 5 on the jacket housing 17, screwed to the rod 9. For fluidic connection of the pressure chamber 18 with the annular gap 16 17 holes 22 are incorporated into the radial collar 19 of the shell.

Der Hydraulik-Anschlußblock 14 besitzt einen in das Degenrohr 15 und einen in den Ringspalt 16 mündenden Leitungsanschluß 23 bzw. 24, die über Leitungen 25 bzw. 26 an eine nicht gezeigte Ölversorgung und übliche Hydraulikeinheit angeschlossen sind. Zur Eilbewegung des Preßkolbens 5 in seine Arbeitsposition in Preßrichtung 6 strömt über eine Druckölleitung 27 aus einer Ölversorgung Öl in den Zylinderraum 28 hinter den Preßkolben 5 und gleichzeitig über die Leitung 25 und den Anschluß 23 in das Degenrohr 15, so daß diese zusätzliche Ölmenge in einen vor dem Radialkragen 19 und der Kopfverdickung 20 liegenden Druckraum 29 der Hohlbohrung 13 der Stange 9 gelangt und den Vorwärtshub unterstützt. Sobald der Preßkolben 5 seine Preßposition erreicht hat, wird die Ölzuführung über die Leitung 25 zum Degenrohr 15 gesperrt und der Arbeitsdruck nur mehr über die Druckölleitung 27 aufgebracht. Zur Rückwärtsbewegung des Preßkolbens 5 in seine in der Zeichnung dargestellte Ausgangsposition wird von der hydraulischen Steuereinheit das Abfließen der Ölmenge aus dem Zylinderraum 28 und dem Druckraum 29 freigegeben und gleichzeitig über die Leitung 26 und den Anschluß 24 zusätzliches Öl in den Ringspalt 16 geleitet, von wo es sich über die Bohrung 22 in den Druckraum 18 verteilt und zur Rückstellbewegung des Preßkolbens 5 auf die Packung 21 einwirkt.The hydraulic connection block 14 has an opening into the sear tube 15 and an opening into the annular gap 16 line connection 23 and 24, which are connected via lines 25 and 26 to a not shown oil supply and conventional hydraulic unit. For rapid movement of the plunger 5 in its working position in the pressing direction 6 flows via a pressure oil line 27 from an oil supply oil in the cylinder chamber 28 behind the plunger 5 and at the same time via the line 25 and the port 23 in the rapier tube 15, so that this additional amount of oil in a before the radial collar 19 and the head thickening 20 lying pressure chamber 29 of the hollow bore 13 of the rod 9 passes and supports the forward stroke. Once the plunger 5 has reached its pressing position, the oil supply is blocked via the line 25 to the rapier tube 15 and the working pressure applied only via the pressure oil line 27. For the backward movement of the plunger 5 in its starting position shown in the drawing is of the hydraulic Control unit, the discharge of the amount of oil from the cylinder chamber 28 and the pressure chamber 29 released and simultaneously passed through the line 26 and the terminal 24 additional oil in the annular gap 16, from where it is distributed via the bore 22 in the pressure chamber 18 and the return movement of the plunger 5 acts on the pack 21.

Das Ausführungsbeispiel nach der Zeichnung zeigt weiterhin, daß die mit dem integrierten Vor- und Rückzugzylinder 12 ausgebildete Stange 9 weiterhin mit einem am Zylindergehäuseboden 8 angeschraubten Ausgleichsbehälter 30 kombiniert ist. Dieser wird an seinem rückwärtigen Ende von einem an der Stange 9 festgelegten Schieber 31 verschlossen, dessen Mantelfläche abgedichtet bei Hubbewegungen über die Behälterinnenwandung gleitet. Der Hydraulik-Anschlußblock 14 für den integrierten Vor- und Rückzugzylinder 12 der Stange 9 ist hier mit einer Glocke 32 verschraubt, die ihrerseits an die Stirnfläche des Ausgleichsbehälters 30 angeschraubt ist. Der zwischen dem Ausgleichsbehälter 30 und der Stange 9 sowie dem Zylindergehäuseboden 8 und dem Schieber 13 eingeschlossene Füllraum 33 bevorratet Öl, das von dort entweder in den Zylinderraum 28 hinter dem Preßkolben 5 über im Zylindergehäuseboden 8 vorgesehene Anschlußleitungen 35 oder über eine Tankleitung 34 in einen Tank bzw. bei gegenläufiger Beaufschlagung umgekehrt strömen kann und somit hin und her geschoben wird.The embodiment of the drawing also shows that the trained with the integrated forward and retraction cylinder 12 rod 9 is further combined with a bolted to the cylinder housing bottom 8 reservoir 30. This is closed at its rear end by a fixed to the rod 9 slide 31, the lateral surface sealed slides during strokes on the container inner wall. The hydraulic connection block 14 for the integrated forward and retraction cylinder 12 of the rod 9 is screwed here with a bell 32, which in turn is screwed to the end face of the surge tank 30. The enclosed between the surge tank 30 and the rod 9 and the cylinder housing base 8 and the slider 13 filling space 33 stockpiled oil from there either in the cylinder chamber 28 behind the plunger 5 via provided in the cylinder housing bottom 8 leads 35 or via a tank line 34 into a tank or in reverse flow can flow in opposite directions and thus pushed back and forth.

Bei der Vorwärtsbewegung des Preßkolbens 5 in seine Arbeits- bzw. Preßposition sind in den Verbindungsleitungen 35 angeordnete, schaltbare Sperrventile 36 in Cartridge-Bauweise in ihrer geöffneten Betriebsstellung, so daß das Öl von dem Schieber 31 aus dem Füllraum 33 in den Zylinder- bzw. Plungerraum 28 herausgedrückt. In der Preßposition werden die Sperrventile 36, von denen insgesamt vier vorhanden sind, über ihre an die Hydraulikeinheit angeschlossenen Steuerleitungen 37 geschlossen und das zum Pressen des Stranges benötigte Drucköl nur noch über die Druckölleitung 27 in den Zylinderraum 28 zugeführt. Über die während dieser Betriebsphase gleichzeitig geöffnet geschaltete Tankleitung 34 drückt der Schieber 31 bei seiner sich mit dem Preßhub in Preßrichtung 6 fortsetzenden Bewegung die in dem Füllraum 33 verbliebene Restölmenge in einen Tank. Die beim Preß-Arbeitshub von dem Schieber 31 eingenommene Endlage ist strichpunktiert (vgl. 31') verdeutlicht.In the forward movement of the plunger 5 in its working or pressing position are arranged in the connecting lines 35, switchable shut-off valves 36 in cartridge design in its open operating position, so that the oil from the slide 31 from the filling chamber 33 in the cylinder or Plunger space 28 pushed out. In the pressing position, the check valves 36, of which a total of four are closed by their connected to the hydraulic unit control lines 37 and the pressure oil required for pressing the strand supplied only via the pressure oil line 27 into the cylinder chamber 28. About the simultaneously opened during this phase of operation tank line 34 pushes the slide 31 at its continuing with the pressing stroke in the pressing direction 6 movement remaining in the filling space 33 residual oil amount in one Tank. The end position occupied by the slide 31 during the pressing working stroke is illustrated in phantom (compare 31 ').

Bei der Rückwärtsbewegung des Preßkolbens 5 in die gezeigte Ausgangsposition werden durch Umsteuern die entsprechenden Strömungswege freigegeben, wobei sich der Füllraum 33 des Ausgleichsbehälters 30 wieder mit seiner Ausgangsmenge füllt. Der Eilgang zum Vor- bzw. Rückhub wird hierbei in der weiter oben beschriebenen Weise durch den in der Stange 9 integrierten Vor- und Rückzugzylinder 12 durchgeführt. Für etwaige Leckölmengen ist vor dem Schieber 31 eine zu einem Tank 38 führende Leckölleitung 39 vorgesehen.In the reverse movement of the plunger 5 in the initial position shown, the corresponding flow paths are released by reversing, with the filling chamber 33 of the surge tank 30 fills again with its initial amount. The rapid traverse to the forward or return stroke is in this case carried out in the manner described above by the integrated in the rod 9 feed and retraction cylinder 12. For any amount of leakage oil a leading to a tank 38 leak oil line 39 is provided in front of the slide 31.

Claims (3)

  1. Extruder and pipe extruder (1) having a main or pressing cylinder which is located in a cylinder bar (2) and includes in the cylinder housing (3) thereof a ram (5) that is connected to a rod (9) protruding from the cylinder housing characterised in that the freely protruding end of the rod (9) is surrounded by an expansion tank (30) that is attached to the main cylinder housing (3), and in which a slide (31) that is insulated from the inner wall of the tank and located on the end of the rod farthest from the main cylinder housing (3) slides when pressure is applied by the ram (5), wherein the filling space (33) that is formed between the rod (9) and the expansion tank (30) and delimited at the ends thereof by the slide (31), communicates via connecting lines (35) with the cylinder chamber (28) of the main cylinder (3) located behind the ram (5), into which a pressure oil line (27) also empties.
  2. The extruder and pipe extruder as recited in claim 1,
    characterised in that
    the filling space (33) of the expansion tank (30) is also connected to a tank line (34).
  3. The extruder and pipe extruder as recited in either of claims 1 or 2,
    characterised in that
    switchable check valves (36) are situated in the connecting lines (35) that are conformed in the base of the cylinder housing (8) and lead from the filling space (33) to the cylinder chamber (28) behind the ram (5).
EP03778235A 2002-08-08 2003-08-05 Main cylinder or press cylinder of an extrusion/ tube extrusion press Expired - Lifetime EP1526930B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10236297A DE10236297A1 (en) 2002-08-08 2002-08-08 Main/press cylinder for pipe extruder and extrusion press has projecting rod with integrated advance and retraction cylinder and hollow bore containing a tube
DE10236297 2002-08-08
PCT/DE2003/002621 WO2004018120A1 (en) 2002-08-08 2003-08-05 Main cylinder or press cylinder of an extrusion/ tube extrusion press

Publications (2)

Publication Number Publication Date
EP1526930A1 EP1526930A1 (en) 2005-05-04
EP1526930B1 true EP1526930B1 (en) 2007-07-04

Family

ID=30469564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03778235A Expired - Lifetime EP1526930B1 (en) 2002-08-08 2003-08-05 Main cylinder or press cylinder of an extrusion/ tube extrusion press

Country Status (7)

Country Link
US (1) US7421874B2 (en)
EP (1) EP1526930B1 (en)
JP (1) JP4149995B2 (en)
AT (1) ATE366152T1 (en)
DE (2) DE10236297A1 (en)
ES (1) ES2289343T3 (en)
WO (1) WO2004018120A1 (en)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO2013064250A1 (en) 2011-10-31 2013-05-10 Sms Meer Gmbh Method for producing metal extrusion press products, and extrusion and tube press
WO2013064251A1 (en) 2011-10-31 2013-05-10 Sms Meer Gmbh Extruder and tube extruder or metal extrusion press
DE102014209685B3 (en) * 2014-05-21 2015-10-22 Sms Meer Gmbh Extruder with hydraulic drive

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101985150B (en) * 2010-08-02 2013-06-12 天津市天锻压力机有限公司 Hydropress with compound function of isothermal forging and electrode pressing
CN102729518B (en) * 2011-04-13 2015-12-16 昆山永年先进制造技术有限公司 Hydraulic press, for the cylinder girder construction of hydraulic press and manufacture method thereof
DE102012009182A1 (en) * 2012-05-10 2013-11-14 Sms Meer Gmbh Hydraulic extruder and method for operating a hydraulic extruder
LU92917B1 (en) * 2015-12-17 2017-06-19 Sms Group Gmbh Extrusion and tube press or metal extrusion press

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JPS5215627B1 (en) * 1971-07-10 1977-05-02
FR2154971A5 (en) * 1971-10-01 1973-05-18 Morane Somua Presses Mat Direct method drawing presses - with simplified charging and shortened drive element work path
DE2419709B2 (en) * 1974-04-24 1976-09-02 Schloemann-Siemag AG, 4000 Düsseldorf PRESSING PUNCH HOLDER ON A METAL EXTRUSION PRESS
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013064250A1 (en) 2011-10-31 2013-05-10 Sms Meer Gmbh Method for producing metal extrusion press products, and extrusion and tube press
WO2013064251A1 (en) 2011-10-31 2013-05-10 Sms Meer Gmbh Extruder and tube extruder or metal extrusion press
KR20140027536A (en) * 2011-10-31 2014-03-06 에스엠에스 메르 게엠베하 Method for producing metal extrusion press products, and extrusion and tube press
RU2569008C1 (en) * 2011-10-31 2015-11-20 Смс Меер Гмбх Pipe-and-bar press or shaped articles extruder
KR101584075B1 (en) 2011-10-31 2016-01-11 에스엠에스 메르 게엠베하 Method for producing metal extrusion press products, and extrusion and tube press
DE102014209685B3 (en) * 2014-05-21 2015-10-22 Sms Meer Gmbh Extruder with hydraulic drive

Also Published As

Publication number Publication date
WO2004018120A1 (en) 2004-03-04
US20060101886A1 (en) 2006-05-18
ATE366152T1 (en) 2007-07-15
ES2289343T3 (en) 2008-02-01
DE50307620D1 (en) 2007-08-16
JP2005534501A (en) 2005-11-17
JP4149995B2 (en) 2008-09-17
US7421874B2 (en) 2008-09-09
EP1526930A1 (en) 2005-05-04
DE10236297A1 (en) 2004-02-19

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