EP0337145A2 - Device for hydrostatically supporting rolls of a rolling mill - Google Patents

Device for hydrostatically supporting rolls of a rolling mill Download PDF

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Publication number
EP0337145A2
EP0337145A2 EP89104651A EP89104651A EP0337145A2 EP 0337145 A2 EP0337145 A2 EP 0337145A2 EP 89104651 A EP89104651 A EP 89104651A EP 89104651 A EP89104651 A EP 89104651A EP 0337145 A2 EP0337145 A2 EP 0337145A2
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EP
European Patent Office
Prior art keywords
roller
support element
pressure medium
shaped recess
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89104651A
Other languages
German (de)
French (fr)
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EP0337145B1 (en
EP0337145A3 (en
Inventor
Erich Stoy
Hans Römmen
Dieter Rumpf
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag 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 SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to AT89104651T priority Critical patent/ATE82880T1/en
Publication of EP0337145A2 publication Critical patent/EP0337145A2/en
Publication of EP0337145A3 publication Critical patent/EP0337145A3/en
Application granted granted Critical
Publication of EP0337145B1 publication Critical patent/EP0337145B1/en
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
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends

Definitions

  • the invention relates to a device for hydrostatic support of rolls of a rolling mill, in particular for direct support of the work rolls of a rolling mill, consisting of support elements arranged in the roll stand, which have shell-shaped recesses on their side facing the roll and which are connected to pressure medium lines.
  • the flow rate of the pressure medium is also dependent on the pressure loads emanating from the work rolls during operation of the rolling mill, which make special variable pump control necessary.
  • the height of the pressure medium flow which is always changed as a function of the work rolls, also has a disadvantageous effect on the cooling of the rolls.
  • special control valves with mechanical buttons placed at both ends of the roller and reducing the roller support surface are required in order to keep the roller in its predetermined target position.
  • the object of the invention is to provide a hydrostatic roller support device which, while avoiding the known disadvantages, in particular enables the available support surface to be used optimally in a simple and particularly economical manner.
  • the cross section of the recess of the support element which is elliptical in cross-section, on the one hand very advantageously enables a pressure medium cushion to be built up between the roller surface and the support element, which, with favorable pressure conditions, ensures the maintenance of sufficiently large gap widths between the roller surface and allows the outer edges of the support element for the outlet of the pressure medium, so that hydraulic centering measures can be dispensed with, and on the other hand allows the elliptical recess of the support element di e Adaptation of the support element to rolls with different roll diameters.
  • each pressure chamber is subjected to different pressure per se and thus the support device can be optimally adapted to the different pressure loads occurring on the work rolls during operation of the rolling mill.
  • hydrostatic support is required the rolls of a rolling mill according to the invention, neither auxiliary supports nor pump control devices are required, since the pressure medium flow can always be kept constant.
  • An intensive, high cooling effect of the rollers is also always achieved by the configuration and arrangement of the support element according to the invention.
  • the locking webs consist of a crescent-shaped elastic material, in particular of plastic.
  • plastics are understood to mean all non-metallic, modern material combinations, in particular also fiber-reinforced plastics, which can be used particularly advantageously in this environment.
  • the locking webs according to the invention are provided with openings for the supply of lubricants in the area between the roller surface and the locking webs. In this way, the service life of the barriers becomes complete significantly increased, and the lubricant can also serve very advantageously as a pressure and barrier medium
  • the locking web is connected to a compression spring. With the help of this compression spring, the locking web is pressed close to the roller surface and held in position so that no pressure medium can get from one pressure chamber into the adjacent pressure chamber between the locking web and the roller surface.
  • the locking webs are arranged in the cup-shaped recess of the support element at an angle of approximately 45 degrees obliquely to the roller axis and to the pressure medium lines several channels arranged in the support element are connected with nozzles which open into the chambers.
  • This inclined arrangement of the locking webs and the nozzles in the support element is advantageously characterized by a particularly good pressure medium distribution in the chambers and protection of the roller surface.
  • three channels with nozzles are arranged in one plane in the support element, the central channel being directed perpendicularly to the roller surface and the two outer channels being directed obliquely outwards to the periphery of the roller surface.
  • the device for the hydrostatic support of rolls of a rolling mill consists of a support element (1) which, according to the invention, extends over the entire length of the roll (2).
  • This support element (1) is firmly clamped in a roll stand, not shown in the drawing.
  • the support element (1) is provided on the inside with a shell-shaped recess (3) which is elliptical in cross section.
  • the support element (1) shown in FIG. 1, which engages the roller (2), makes it very advantageous to use almost 100 percent of the support surface of the support element (1) to support the work roll or any other roll that is used, for example, to support the work rolls , achieved, so that in comparison to known support devices under otherwise identical working conditions of the rolling mill, it is possible to work with up to about 70% less pressure and energy.
  • the pressure medium is fed into the pressure chambers (6) very advantageously via valve-controlled pressure medium supply lines (7), so that the contact pressure in the individual pressure chambers (6) varies and the pressure in each area of the roller can thus be optimally adapted to the requirements. This is particularly important when supporting relatively long work rolls with small diameters (200 mm and less).
  • the locking webs (12) in the bowl-shaped recess of the support element (13) can also very advantageously be arranged at an angle of approximately 45 degrees to the roller axis (14), in such a way that the circumferential direction Seen roller (15), the upper and lower ends of the locking webs (12) overlap.
  • the entire surface of the roller (15) is brought into contact with the pressure medium in the support region of the support element (13), which pressure medium, channels (16) and the nozzles (17) in accordance with the locking webs (12) in the support element (13) are arranged accordingly obliquely.
  • the lubricant is fed into the area between the locking webs (12) and the roller surface in the same way as in the support element (1) shown in FIG. 1, namely through corresponding openings (19) in the support element (13).
  • FIG. 3 shows in cross section and on an enlarged scale
  • three channels (16) with their nozzles (17) for the pressure medium supply into the chamber (18) are each arranged in one plane such that the support element (13) pressure medium supplied from the outside in the direction of the arrow (20) via the nozzles (1) both into the central region and into the edge regions of the crescent-shaped pressure chamber (18).
  • a gap width (21) of between approximately 0.5 and 1.5 mm is expediently maintained between the support element (13) and the roller body (15), as a result of which any inaccuracies are covered or compensated for and hydraulic centering measures can be dispensed with.
  • the support element (13) is firmly clamped to the frame of the roll stand with the help of wedges or the like, so that it is used if necessary can be easily installed and removed or replaced at any time
  • the three channels (16) located in the support element (13) in one plane with the nozzles (17) can be arranged very advantageously and also in such a way that the central channel (16), as in Fig. 3, perpendicular to the Roll surface is directed, whereas, however, the outer channels (16) with their nozzles (17) are directed obliquely outwards to the periphery of the roller surface.
  • a high dynamic centering ability is achieved, in particular due to the inclined position of the nozzles (17), which can very advantageously be designed as flat jet nozzles.
  • the lubricant is introduced via a line (not shown in the drawing) in the direction of the arrow (24) into the channels (25) arranged in the support element (13) under high pressure, from where it passes through the openings (19) into the pocket-shaped facing the roller surface Recess (26) arrives in the barrier web (12).
  • the locking webs (12) according to the invention consist of an elastic material, in particular plastic, and the lubricant is introduced under high pressure between the roller surface and the locking web, sliding friction in the area of the barrier webs is reduced to a minimum.
  • the service life of the barrier webs (12), which can also be easily replaced and renewed at any time, is therefore very long.
  • the measures according to the invention are not limited to the exemplary embodiments shown in the drawing figures.
  • the locking webs within the support element can be in any angular arrangement and can be shaped in any manner, in particular also lie one above the other.
  • the respective structural design is left to the person skilled in the art to adapt to the later use of the device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Crushing And Grinding (AREA)
  • Metal Rolling (AREA)
  • Paper (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

In the hydrostatic support of the rolls of a rolling mill, the utilisation of the supporting surface available is of particular importance both for centring and for expenditure in terms of energy and costs. However, the hitherto known supporting devices for rolls permit only a relatively low utilisation of the supporting surface available and are therefore afflicted by a correspondingly high expenditure in terms of energy and costs. According to the invention, very high, almost 100% utilisation of the supporting surface of the supporting element is achieved by the fact that each roll (2) is provided with only one supporting element (1), which extends over the entire length of the roll (2) and the shell-shaped recess (3) of which is preferably of elliptical cross-section and that, arranged in the shell-shaped recess of the supporting element (1), are mutually spaced blocking webs (5) which extend transversely to the said element and divide the shell-shaped recess (3) into a plurality of pressure chambers (6) to which the pressure-medium lines (7) are connected. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur hydrostatischen Abstützung von Walzen eines Walzwerkes, insbesondere zur direkten Abstützung der Arbeitswalzen eines Walzwerkes, bestehend aus im Walzgerüst angeordneten Stützelementen, die an ihrer der Walze zugekehrten Seite schalenförmige Ausnehmungen aufweisen und die an Druckmittelleitungen angeschlossen sind.The invention relates to a device for hydrostatic support of rolls of a rolling mill, in particular for direct support of the work rolls of a rolling mill, consisting of support elements arranged in the roll stand, which have shell-shaped recesses on their side facing the roll and which are connected to pressure medium lines.

Aus der deutschen Patentschrift 26 51 028 ist eine Walzenstützvorrichtung zum Abstützen von Walzen quer zu ihrer Druckrichtung bekannt, die mehrere, über die Länge der Walze verteilte Stützelemente aufweist, welche auf ihrer, der Oberfläche der gestützen Walze zugewandten Fläche mit schalenförmigen Lagertaschen zur hydrostatischen Lagerung versehen und an eine Druckmittelzuführungsleitung angeschlossen sind. Das über die Druckmittelzuführungsleitung den Lagertaschen der Stützelemente zugeführte Druckmittel wird hierbei über Steuerventile mit mechanischen Tastern geführt, die an beiden Enden der jeweils gestützen Walze angeordnet sind und die die Lage der Enden der Walze abtasten. Sobald sich die Walze in der einen oder anderen Richtung aus ihrer vorgegebenen Sollage entfernt, wird durch die Steuerventile der Druck des Druckmittels in der Druckmittelzuführungsleitung vermindert oder erhöht und dadurch die Walze in ihre Sollage zurückgebracht Bei dieser bekannten Walzenstützvorrichtung ist jedoch von Nachteil, daß die mit Abstand nebeneinander angeordneten Stützelemente nur eine sehr geringe Ausnutzung der zur Verfügung stehenden Stützfläche ermöglichen. Der Walzenabstützungswirkungsgrad ist daher auch entsprechend gering und kann nur durch stark überhöhten Pumpendruck den jeweiligen Anforderungen angepaßt werden. Dies ist wiederum mit einem erhöhten Energie- und Kostenaufwand verbunden.From German patent specification 26 51 028 a roll support device for supporting rolls transverse to their printing direction is known, which has several support elements distributed over the length of the roll, which on its surface facing the surface of the supported roll are provided with shell-shaped bearing pockets for hydrostatic storage and are connected to a pressure medium supply line. The pressure medium supplied to the bearing pockets of the support elements via the pressure medium supply line is guided here via control valves with mechanical buttons which are arranged at both ends of the respective supported roller and which sense the position of the ends of the roller. As soon as the roller moves in one direction or the other from its predetermined target position, the pressure of the pressure medium in the pressure medium supply line is reduced or increased by the control valves and thereby the roller in its Desired position brought back With this known roller support device, however, it is disadvantageous that the support elements arranged next to one another at a distance permit only very little utilization of the available support surface. The roller support efficiency is therefore also correspondingly low and can only be adapted to the respective requirements by means of greatly increased pump pressure. This in turn is associated with increased energy and cost expenditure.

Darüber hinaus ist hierbei auch der Förderstrom des Druckmittels abhängig von den im Betrieb des Walzwerkes von den Arbeitswalzen ausgehenden Druckbelastungen, die eine besondere variable Pumpenregelung erforderlich machen. Der in Abhängigkeit von den Arbeitswalzen ausgehenden Druckbelastungen in seiner Höhe stets veränderte Druckmittelförderstrom wirkt sich im übrigen auch nachteilig auf die Kühlung der Walzen aus. Schließlich sind bei dieser bekannten Walzenstützvorrichtung besondere, an beiden Enden der Walze plazierte, die Walzenstützfläche vermindernde Steuerventile mit mechanischen Tastern erforderlich, um die Walze in ihrer vorgegebenen Sollage zu halten.In addition, the flow rate of the pressure medium is also dependent on the pressure loads emanating from the work rolls during operation of the rolling mill, which make special variable pump control necessary. The height of the pressure medium flow, which is always changed as a function of the work rolls, also has a disadvantageous effect on the cooling of the rolls. Finally, in this known roller support device, special control valves with mechanical buttons placed at both ends of the roller and reducing the roller support surface are required in order to keep the roller in its predetermined target position.

Die Aufgabe der Erfindung besteht darin, eine hydrostatische Walzenabstützvorrichtung zu schaffen, die unter Vermeidung der bekannten Nachteile, insbesondere eine optimale Nutzung der zur Verfügung stehenden Stützfläche in einfacher und besonders wirtschaftlicher Weise ermöglicht.The object of the invention is to provide a hydrostatic roller support device which, while avoiding the known disadvantages, in particular enables the available support surface to be used optimally in a simple and particularly economical manner.

Diese Aufgabe wird dadurch gelöst, daß für jede Walze jeweils nur ein Stützelement vorgesehen ist, das sich über die ganze Länge der Walze erstreckt und dessen schalenförmige Ausnehmung vorzugsweise im Querschnitt ellipsenförmig ausgebildet ist, und daß in der schalenförmigen Ausnehmung des Stützelementes quer dazu verlaufende Sperrstege mit Abstand voneinander angeordnet sind, die die schalenförmige Ausnehmung in mehrere Druckkammern unterteilen, an die die Druckmittelleitungen angeschlossen sind. Dadurch, daß gemäß der Erfindung für jede Walze jeweils nur ein Stützelement vorgesehen ist, das sich über die ganze Länge der Walze erstreckt, kann sehr vorteilhaft nahezu die gesamte Fläche des Stützelementes genutzt und dadurch mit verhältnismäßig geringem Pumpendruck und Energieaufwand und bei konstantem Druckmittelförderstrom ein über die ganze Länge der Walze ausreichend hoher hydrostatischer Anpreßdruck erzeugt und aufrecht erhalten werden Die im Querschnitt ellipsenförmige Ausnehmung des Stützelementes ermöglicht einerseits sehr vorteilhaft den Aufbau eines Druckmittelpolsters zwischen der Walzenoberfläche und dem Stützelement, was bei günstigen Druckverhältnissen die Aufrechterhaltung von genügend großen Spaltweiten zwischen der Walzenoberfläche und den äußeren Rändern des Stützelementes für den Austritt des Druckmittels ermöglicht, so daß auf hydraulische Zentriermaßnahmen verzichtet werden kann, und andererseits ermöglicht die ellipsenförmige Ausnehmung des Stützelementes die Anpassung des Stützelementes an Walzen mit unterschiedlichen Walzendurchmessern. Ferner kann durch die erfindungsgemäße Unterteilung der ellipsenförmigen Ausnehmung des Stützelementes durch Sperrstege in einzelne Kammern, an die die Druckmittelleitungen angeschlossen sind, jede Druckkammer für sich mit unterschiedlichem Druck beaufschlagt und dadurch die Abstützvorrichtung optimal an die im Betrieb des Walzwerkes an den Arbeitswalzen auftretenden unterschiedlichen Druckbelastungen angepaßt werden Im übrigen sind zur hydrostatischen Abstützung der Walzen eines Walzwerkes gemäß der Erfindung weder Hilfsstützen noch Pumpenregeleinrichtungen erforderlich, da der Druckmittelförderstrom stets konstant gehalten werden kann. Auch wird durch die erfindungsgemäße Ausgestaltung und Anordnung des Stützelementes stets eine intensive, hohe Kühlwirkung der Walzen erzielt.This object is achieved in that only one support element is provided for each roller, which extends over the entire length of the roller and whose shell-shaped recess is preferably elliptical in cross section, and that in the shell-shaped recess of the support element transverse locking webs with Are arranged at a distance from one another, which subdivide the shell-shaped recess into a plurality of pressure chambers to which the pressure medium lines are connected. The fact that, according to the invention, only one support element is provided for each roller, which extends over the entire length of the roller, can be used very advantageously almost the entire surface of the support element and thus with a relatively low pump pressure and energy consumption and a constant pressure medium flow rate over the entire length of the roller is generated and maintained at a sufficiently high hydrostatic contact pressure. The cross section of the recess of the support element, which is elliptical in cross-section, on the one hand very advantageously enables a pressure medium cushion to be built up between the roller surface and the support element, which, with favorable pressure conditions, ensures the maintenance of sufficiently large gap widths between the roller surface and allows the outer edges of the support element for the outlet of the pressure medium, so that hydraulic centering measures can be dispensed with, and on the other hand allows the elliptical recess of the support element di e Adaptation of the support element to rolls with different roll diameters. Furthermore, the division of the invention elliptical recess of the support element by means of barrier webs in individual chambers to which the pressure medium lines are connected, each pressure chamber is subjected to different pressure per se and thus the support device can be optimally adapted to the different pressure loads occurring on the work rolls during operation of the rolling mill. Otherwise, hydrostatic support is required the rolls of a rolling mill according to the invention, neither auxiliary supports nor pump control devices are required, since the pressure medium flow can always be kept constant. An intensive, high cooling effect of the rollers is also always achieved by the configuration and arrangement of the support element according to the invention.

In weiterer Ausgestaltung der Erfindung bestehen die Sperrstege aus einem mondsichelförmig ausgebildeten elastischen Material, insbesondere aus Kunststoff. Derartige Materialien zeichnen sich durch ihren geringen Reibungswiderstand und gute Dichtwirkung aus. Dabei werden unter dem Begriff "Kunststoffe" alle nichtmetallischen, modernen Werkstoffkombinationen verstanden, insbesondere auch faserverstärkte Kunststoffe, die in diesem Umfeld besonders vorteilhaft eingesetzt werden können.In a further embodiment of the invention, the locking webs consist of a crescent-shaped elastic material, in particular of plastic. Such materials are characterized by their low frictional resistance and good sealing effect. The term "plastics" is understood to mean all non-metallic, modern material combinations, in particular also fiber-reinforced plastics, which can be used particularly advantageously in this environment.

Um die Gleitreibung zwischen der Walzenoberfläche und den Sperrstegen möglichst gering zu halten, sind die Sperrstege gemäß der Erfindung mit Öffnungen für die Zuführung von Schmiermitteln in den Bereich zwischen der Walzenoberfläche und den Sperrstegen versehen. Die Standzeit der Sperrstege wird auf diese Weise ganz wesentlich erhöht, und das Schmiermittel kann hierbei auch gleichzeitig sehr vorteilhaft als Drück- und Sperrmedium dienenIn order to keep the sliding friction between the roller surface and the locking webs as low as possible, the locking webs according to the invention are provided with openings for the supply of lubricants in the area between the roller surface and the locking webs. In this way, the service life of the barriers becomes complete significantly increased, and the lubricant can also serve very advantageously as a pressure and barrier medium

Gemäß einer weiteren Ausgestaltung der Erfindung steht der Sperrsteg mit einer Druckfeder in Verbindung. Mit Hilfe dieser Druckfeder wird der Sperrsteg dicht an die Walzenoberfläche gedrückt und in seiner Lage gehalten, so daß zwischen dem Sperrsteg und der Walzenoberfläche kein Druckmedium von einer Druckkammer in die benachbarte Druckkammer gelangen kann.According to a further embodiment of the invention, the locking web is connected to a compression spring. With the help of this compression spring, the locking web is pressed close to the roller surface and held in position so that no pressure medium can get from one pressure chamber into the adjacent pressure chamber between the locking web and the roller surface.

In einer besonders bevorzugten Ausführungsform der Erfindung sind die Sperrstege in der schalenförmigen Ausnehmung des Stützelementes in einem Winkel von etwa 45 Grad schräg zur Walzenachse verlaufend angeordnet und an die Druckmittelleitungen sind mehrere, im Stützelement angeordnete Kanäle mit Düsen angeschlossen, die in die Kammern münden. Diese Schräganordnung der Sperrstege und der Düsen im Stützelement zeichnet sich vorteilhaft durch eine besonders gute Druckmittelverteilung in den Kammern und Schonung der Walzenoberfläche aus.In a particularly preferred embodiment of the invention, the locking webs are arranged in the cup-shaped recess of the support element at an angle of approximately 45 degrees obliquely to the roller axis and to the pressure medium lines several channels arranged in the support element are connected with nozzles which open into the chambers. This inclined arrangement of the locking webs and the nozzles in the support element is advantageously characterized by a particularly good pressure medium distribution in the chambers and protection of the roller surface.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung sind im Stützelement jeweils drei Kanäle mit Düsen in einer Ebene angeordnet, wobei der mittlere Kanal senkrecht auf die Walzenoberfläche gerichtet ist, und die beiden äußeren Kanäle schräg nach außen zur Peripherie auf die Walzenoberfläche gerichtet sind. Hierdurch kann sehr vorteilhaft ein im Bereich des Stützelementes gleichmäßig auf die Walzenoberfläche verteilt wirkender, wie auch zentrierender hydraulischer Preßdruck erreicht und aufrechterhalten werden.According to a further advantageous embodiment of the invention, three channels with nozzles are arranged in one plane in the support element, the central channel being directed perpendicularly to the roller surface and the two outer channels being directed obliquely outwards to the periphery of the roller surface. This can be very advantageous in the area of the support element evenly on the The roller surface distributing acting as well as centering hydraulic pressure can be achieved and maintained.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung werden nachfolgend anhand von in den Zeichnungsfiguren schematisch dargestellten Ausführungsbeispielen näher erläutert.Further details, features and advantages of the invention are explained in more detail below on the basis of exemplary embodiments shown schematically in the drawing figures.

Es zeigen :

  • Fig. 1 ein an einer Walze angeordnetes Stütz­element gemäß der Erfindung in perspektivischer Ansicht,
  • Fig. 2 ein an einer Walze angeordnetes Stütz­element gemäß der Erfindung mit darin schräg verlaufenden Sperrstegen und Druckmittelkanälen in Draufsicht,
  • Fig. 3 einen Schnitt nach der Linie A-B in Fig. 2 durch die Druckmittelkanäle, in vergrößertem Maßstab,
  • Fig. 4 eine Anordnung von in einem Stützelement in einer Ebene schräg verlaufenden Druckmittelkanälen gemäß der Erfindung, im Querschnitt und in vergrößertem Maßstab,
  • Fig. 5 einen Schnitt nach der Linie C-D in Fig. 2 durch den Sperrsteg, in vergrößertem Maßstab.
Show it :
  • 1 shows a perspective view of a support element arranged on a roller,
  • 2 is a plan view of a support element arranged on a roller according to the invention, with locking webs running obliquely therein and pressure medium channels,
  • 3 shows a section along the line AB in FIG. 2 through the pressure medium channels, on an enlarged scale,
  • 4 shows an arrangement of pressure medium ducts which run obliquely in one plane in a support element according to the invention, in cross section and on an enlarged scale,
  • Fig. 5 shows a section along the line CD in Fig. 2 by the barrier, on an enlarged scale.

Wie Figur 1 zeigt, besteht die Vorrichtung zur hydrostatischen Abstützung von Walzen eines Walzwerkes aus einem Stützelement (1), das sich gemäß der Erfindung über die ganze Länge der Walze (2) erstreckt. Dieses Stützelement (1) ist in einem, in der Zeichnung nicht näher dargestellten Walzgerüst fest eingespannt. An der der Walze (2) zugekehrten Seite ist das Stützelement (1) innen mit einer schalenförmigen Ausnehmung (3) versehen, die im Querschnitt ellipsenförmig ausgebildet ist. In dieser, in der Zeichnung gestrichelt angedeuteten schalenförmigen Ausnehmung (3), die sich über die ganze Länge des Stützelementes (1) erstreckt und die nur durch seitliche, an die Walze direkt anliegende Stirnwände (4) nach außen zur Seite hin abgeschlossen ist, sind quer zum Stützelement (1) verlaufende Sperrstege (5) angeordnet, die die schalenförmige Ausnehmung (3) in mehrere Druckkammern (6) unterteilen. Am Stützelement (1) sind außen Druckmittelleitungen (7) angeschlossen, durch die über im Stützelement (1) angeordnete Kanäle (8) und Düsen (9) die hydraulischen Druckmedien in die Kammern (6) unter bestimmten Druck eingebracht werden. Ferner sind außen am Stützelement (1) Leitungen (10) angeschlossen und zwar für die Zuführung von Schmiermitteln, wie Öl oder dergleichen, in den Bereich zwischen der Walzenoberfläche und dem Sperrsteg (5). Zum Zweck einer gleichmäßigen Verteilung des Schmiermittels erfolgt die Zuführung des Schmiermittels in den Bereich zwischen der Walzenoberfläche und dem Sperrsteg (5) sehr vorteilhaft über mehrere, im Sperrsteg (5) mit Abstand voneinander angeordnete Öffnungen (11).As FIG. 1 shows, the device for the hydrostatic support of rolls of a rolling mill consists of a support element (1) which, according to the invention, extends over the entire length of the roll (2). This support element (1) is firmly clamped in a roll stand, not shown in the drawing. On the side facing the roller (2), the support element (1) is provided on the inside with a shell-shaped recess (3) which is elliptical in cross section. In this shell-shaped recess (3), indicated by dashed lines in the drawing, which extends over the entire length of the support element (1) and which is only closed off to the side by lateral end walls (4) lying directly against the roller Arranged transverse to the support element (1) are locking webs (5) which divide the bowl-shaped recess (3) into a plurality of pressure chambers (6). Pressure medium lines (7) are connected to the outside of the support element (1), through which channels (8) and nozzles (9) arranged in the support element (1), the hydraulic pressure media are introduced into the chambers (6) under certain pressure. Furthermore, lines (10) are connected to the outside of the support element (1), specifically for the supply of lubricants, such as oil or the like, into the area between the roller surface and the barrier web (5). For the purpose of uniform distribution of the lubricant, the lubricant is very advantageously fed into the area between the roller surface and the locking web (5) via a plurality of openings (11) spaced apart from one another in the locking web (5).

Durch das in Figur 1 dargestellte, an der Walze (2) angreifende Stützelement (1) wird sehr vorteilhaft eine nahezu 100 prozentige Nutzung der Stützfläche des Stützelementes (1) zur Abstützung der Arbeitswalze oder einer beliebigen anderen Walze, die beispielsweise zur Abstützung der Arbeitswalzen dient, erreicht, so daß hierdurch im Vergleich zu bekannten Abstützungsvorrichtungen unter sonst gleichen Arbeitsbedingungen des Walzwerkes mit bis zu etwa 70 % geringerem Druck- und Energieaufwand gearbeitet werden kann. Die Zuführung des Druckmediums in die Druckkammern (6) erfolgt sehr vorteilhaft über ventilgesteuerte Druckmedienzuführungsleitungen (7), so daß der Anpreßdruck in den einzelnen Druckkammern (6) variiert und dadurch der Druck optimal in jedem Bereich der Walze den Erfordernissen angepaßt werden kann. Dies ist insbesondere bei der Abstützung von verhältnismäßig lang ausgebildeten Arbeitswalzen mit kleinen Durchmessern (200 mm und weniger) von ganz besonderer Bedeutung.The support element (1) shown in FIG. 1, which engages the roller (2), makes it very advantageous to use almost 100 percent of the support surface of the support element (1) to support the work roll or any other roll that is used, for example, to support the work rolls , achieved, so that in comparison to known support devices under otherwise identical working conditions of the rolling mill, it is possible to work with up to about 70% less pressure and energy. The pressure medium is fed into the pressure chambers (6) very advantageously via valve-controlled pressure medium supply lines (7), so that the contact pressure in the individual pressure chambers (6) varies and the pressure in each area of the roller can thus be optimally adapted to the requirements. This is particularly important when supporting relatively long work rolls with small diameters (200 mm and less).

Wie die Figur 2 zeigt, können die Sperrstege (12) in der schalenförmigen Ausnehmung des Stützelementes (13) auch sehr vorteilhaft in einem Winkel von etwa 45 Grad schräg zur Walzenachse (14) verlaufend angeordnet werden, und zwar derart, daß sich in Umfangsrichtung der Walze (15) gesehen, die oberen und unteren Enden der Sperrstege (12) überlappen. Auf diese Weise wird im Abstützbereich des Stützelementes (13) jeweils die ganze Oberfläche der Walze (15) mit dem Druckmedium in Berührung gebracht, welches in gleicher Weise wie in Fig. 1 über Druckmittelzuleitungen, Kanäle (16) und die Düsen (17) in Übereinstimmung mit den Sperrstegen (12) im Stützelement (13) entsprechend schräg verlaufend angeordnet. Diese Schräganordnung der Sperrstege (12) und der Düsen (17) im Stützelement (13) gemäß Figur 2 zeichnet sich durch ein besonders gute Druckmittelverteilung in den Kammern (18) und Schonung der Walzenoberfläche aus. Im übrigen erfolgt hierbei die Schmiermittelzufuhr in den Bereich zwischen den Sperrstegen (12) und der Walzenoberfläche in gleicher Weise wie bei dem in Figur 1 dargestellten Stützelement (1), und zwar durch entsprechende Öffnungen (19) im Stützelement (13).As Figure 2 shows, the locking webs (12) in the bowl-shaped recess of the support element (13) can also very advantageously be arranged at an angle of approximately 45 degrees to the roller axis (14), in such a way that the circumferential direction Seen roller (15), the upper and lower ends of the locking webs (12) overlap. In this way, the entire surface of the roller (15) is brought into contact with the pressure medium in the support region of the support element (13), which pressure medium, channels (16) and the nozzles (17) in accordance with the locking webs (12) in the support element (13) are arranged accordingly obliquely. This inclined arrangement of the locking webs (12) and the nozzles (17) in the support element (13) according to FIG. 2 is characterized by a particularly good pressure medium distribution in the chambers (18) and protection of the roller surface. For the rest, the lubricant is fed into the area between the locking webs (12) and the roller surface in the same way as in the support element (1) shown in FIG. 1, namely through corresponding openings (19) in the support element (13).

Im Stützelement (13) sind, wie die Figur 3 im Querschnitt und vergrößertem Maßstab zeigt, drei Kanäle (16) mit ihren Düsen (17) für die Druckmittelzuführung in die Kammer (18) jeweils in einer Ebene angeordnet, derart, daß die dem Stützelement (13) von außen in Pfeilrichtung (20) zugeführten Druckmittel über die Düsen (1) sowohl in den mittleren Bereich als auch in die Randbereiche der mondsichelförmig ausgebildeten Druckkammer (18) gelangen. Hierdurch wird sehr vorteilhaft ein über die Oberfläche der Walze (15) gleichmäßig verteilt wirkender Anpreßdruck des Druckmittels erreicht. Zweckmäßig wird zwischen dem Stützelement (13) und dem Walzenkörper (15) eine Spaltweite (21) zwischen etwa 0,5 und 1,5 mm aufrechterhalten, wodurch etwaige Ungenauigketen überdeckt bzw. ausgeglichen werden und auf hydraulische Zentriermaßnahmen verzichtet werden kann. Im übrigen ist das Stützelement (13) mit dem Rahmen des Walzgerüstes mit Hilfe von Keilen oder dergleichen fest verspannt, so daß es im Bedarfsfalle jederzeit sehr leicht ein- und ausgebaut oder ausgewechselt werden kannIn the support element (13), as FIG. 3 shows in cross section and on an enlarged scale, three channels (16) with their nozzles (17) for the pressure medium supply into the chamber (18) are each arranged in one plane such that the support element (13) pressure medium supplied from the outside in the direction of the arrow (20) via the nozzles (1) both into the central region and into the edge regions of the crescent-shaped pressure chamber (18). This very advantageously achieves a contact pressure of the pressure medium which is uniformly distributed over the surface of the roller (15). A gap width (21) of between approximately 0.5 and 1.5 mm is expediently maintained between the support element (13) and the roller body (15), as a result of which any inaccuracies are covered or compensated for and hydraulic centering measures can be dispensed with. For the rest, the support element (13) is firmly clamped to the frame of the roll stand with the help of wedges or the like, so that it is used if necessary can be easily installed and removed or replaced at any time

Gemäß Figur 4 können die im Stützelement (13) in einer Ebene befindlichen drei Kanäle (16) mit den Düsen (17) sehr vorteilhaft und auch so angeordnet werden, daß der mittlere Kanal (16), wie in Fig. 3, senkrecht auf die Walzenoberfläche gerichtet ist, während demgegenüber jedoch die äußeren Kanäle (16) mit ihren Düsen (17) schräg nach außen zur Peripherie auf die Walzenoberfläche gerichtet sind. Hierdurch wird insbesondere auf Grund der Schrägstellung der Düsen (17), die sehr vorteilhaft als Flachstrahldüsen ausgebildet sein können, eine hohe dynamische Zentrierfähigkeit erreicht.According to Figure 4, the three channels (16) located in the support element (13) in one plane with the nozzles (17) can be arranged very advantageously and also in such a way that the central channel (16), as in Fig. 3, perpendicular to the Roll surface is directed, whereas, however, the outer channels (16) with their nozzles (17) are directed obliquely outwards to the periphery of the roller surface. In this way, a high dynamic centering ability is achieved, in particular due to the inclined position of the nozzles (17), which can very advantageously be designed as flat jet nozzles.

Wie ferner ein Schnitt durch den mondsichelförmigen Sperrsteg (12) gemäß Figur 5 im vergrößerten Maßstab zeigt, wird dieser mit Hilfe einer Schraubenfeder (22), die über einen Bolzen (23) mit dem Sperrsteg (12) in Verbindung steht, gegen die Oberfläche der Walze (15) gedrückt und in dieser Lage festgehalten. Das Schmiermittel wird hierbei über eine in der Zeichnung nicht näher dargestellte Leitung in Pfeilrichtung (24) in die im Stützelement (13) angeordneten Kanäle (25) unter hohem Druck eingeführt, von wo es duch die Öffnungen (19) in die der Walzenoberfläche zugekehrte taschenförmige Ausnehmung (26) im Sperrsteg (12) gelangt. Da die Sperrstege (12) gemäß der Erfindung aus einem elastischen Material, insbesondere aus Kunststoff bestehen, und das Schmiermittel unter hohem Druck zwischen der Walzenoberfläche und dem Sperrsteg eingebracht wird, wird die Gleitreibung im Bereich der Sperrstege auf ein Minimum reduziert. Die Standzeit der Sperrstege (12), die gegebenenfalls auch jederzeit sehr leicht ausgewechselt und erneuert werden können, ist daher sehr hoch.As is also shown on a larger scale, a section through the crescent-shaped locking web (12) according to FIG. 5, this is pressed against the surface of the surface by means of a helical spring (22) which is connected to the locking web (12) by a bolt (23) Pressed roller (15) and held in this position. The lubricant is introduced via a line (not shown in the drawing) in the direction of the arrow (24) into the channels (25) arranged in the support element (13) under high pressure, from where it passes through the openings (19) into the pocket-shaped facing the roller surface Recess (26) arrives in the barrier web (12). Since the locking webs (12) according to the invention consist of an elastic material, in particular plastic, and the lubricant is introduced under high pressure between the roller surface and the locking web, sliding friction in the area of the barrier webs is reduced to a minimum. The service life of the barrier webs (12), which can also be easily replaced and renewed at any time, is therefore very long.

Die erfindungsgemäßen Maßnahmen sind nicht auf die in den Zeichnungsfiguren dargestellten Ausführungsbeispiele beschränkt. So können beispielsweise, ohne den Rahmen der Erfindung zu verlassen, die Sperrstege innerhalb des Stützelementes in einer beliebigen winkligen Anordnung stehen und in beliebiger Weise geformt sein, insbesondere auch übereinander liegen. Die jeweilige konstruktive Ausgestaltung ist in Anpassung an die spätere Verwendung der Vorrichtung dem Fachmann anheimgestellt.The measures according to the invention are not limited to the exemplary embodiments shown in the drawing figures. For example, without departing from the scope of the invention, the locking webs within the support element can be in any angular arrangement and can be shaped in any manner, in particular also lie one above the other. The respective structural design is left to the person skilled in the art to adapt to the later use of the device.

Claims (6)

1. Vorrichtung zur hydrostatischen Abstützung von Walzen eines Walzwerkes, insbesondere zur direkten Abstützung der Arbeitswalzen eines Walzwerkes, bestehend aus im Walzgerüst angeordneten Stützelementen, die an ihrer der Walze zugekehrten Seite schalenförmige Ausnehmungen aufweisen und die an Druckmittelleitungen angeschlossen sind, dadurch gekennzeichnet, daß für jede Walze (2, 15) jeweils nur ein Stützelement (1, 13) vorgesehen ist, das sich über die ganze Länge der Walze (2, 15) erstreckt und dessen schalenförmige Ausnehmung (3) vorzugsweise im Querschnitt ellipsenförmig ausgebildet ist, und daß in der schalenförmigen Ausnehmung (3) des Stützelementes (1, 13) quer dazu verlaufende Sperrstege (5, 12) mit Abstand voneinander angeordnet sind, die die schalenförmige Ausnehmung in mehrere Druckkammern (6, 18) unterteilen, an die die Druckmittelleitungen (7) angeschlossen sind.1. Device for hydrostatic support of rolls of a rolling mill, in particular for direct support of the work rolls of a rolling mill, consisting of support elements arranged in the roll stand, which have cup-shaped recesses on their side facing the roller and which are connected to pressure medium lines , characterized in that for each Roller (2, 15) only one support element (1, 13) is provided, which extends over the entire length of the roller (2, 15) and whose shell-shaped recess (3) is preferably elliptical in cross section, and in that Shell-shaped recess (3) of the support element (1, 13) transverse locking webs (5, 12) are arranged at a distance from one another, which divide the shell-shaped recess into a plurality of pressure chambers (6, 18) to which the pressure medium lines (7) are connected . 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Sperrstege (5, 12) aus einem mondsichelförmig ausgebildeten elastischen Material, insbesondere aus Kunststoff bestehen.2. Device according to claim 1, characterized in that the locking webs (5, 12) consist of a crescent-shaped elastic material, in particular made of plastic. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Sperrstege (5, 12) mit Öffnungen (11, 19) für die Zuführung von Schmiermittel in den Bereich zwischen der Walzenoberfläche und den Sperrstegen (5, 12) versehen ist.3. Apparatus according to claim 1 or 2, characterized in that the locking webs (5, 12) with openings (11, 19) for the supply of lubricant in the region between the roller surface and the locking webs (5, 12) is provided. 4. Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Sperrsteg (5, 12) mit einer Druckfeder (22) in Verbindung steht.4. The device according to one or more of claims 1 to 3, characterized in that the locking web (5, 12) with a compression spring (22) is connected. 5. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sperrstege (5, 12) in der schalenförmigen Ausnehmung (3) des Stützelementes (1, 13) in einem Winkel von etwa 45 Grad schräg zur Walzenachse (14) verlaufend angeordnet sind, und daß an die Druckmittelleitungen (7) mehrere, im Stützelement (1, 13) angeordnete Kanäle (8, 16) mit Düsen (9, 17) angeschlossen sind, die in die Kammern (6, 18) münden.5. The device according to one or more of the preceding claims 1 to 4, characterized in that the locking webs (5, 12) in the cup-shaped recess (3) of the support element (1, 13) at an angle of approximately 45 degrees to the roller axis ( 14) are arranged running, and that several, in the support element (1, 13) arranged channels (8, 16) with nozzles (9, 17) are connected to the pressure medium lines (7), which open into the chambers (6, 18) . 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß für die Druckmittelzuführung im Stützelement (1, 13) jeweils drei Kanäle (8, 16) mit Düsen (9, 17) in einer Ebene angeordnet sind, wobei der mittlere Kanal senkrecht auf die Walzenoberfläche gerichtet ist, und die beiden äußeren Kanäle schräg nach außen zur Peripherie auf die Walzenoberfläche gerichtet sind.6. The device according to claim 5, characterized in that for the pressure medium supply in the support element (1, 13) three channels (8, 16) with nozzles (9, 17) are arranged in one plane, the central channel perpendicular to the roller surface is directed, and the two outer channels are directed obliquely outwards to the periphery of the roller surface.
EP89104651A 1988-04-11 1989-03-16 Device for hydrostatically supporting rolls of a rolling mill Expired - Lifetime EP0337145B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89104651T ATE82880T1 (en) 1988-04-11 1989-03-16 DEVICE FOR THE HYDROSTATIC SUPPORT OF ROLLERS OF A ROLLING MILL.

Applications Claiming Priority (2)

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DE3811952A DE3811952A1 (en) 1988-04-11 1988-04-11 DEVICE FOR HYDROSTATICALLY SUPPORTING ROLLS OF A ROLLING MILL
DE3811952 1988-04-11

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EP0337145A2 true EP0337145A2 (en) 1989-10-18
EP0337145A3 EP0337145A3 (en) 1990-04-04
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EP (1) EP0337145B1 (en)
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AT (1) ATE82880T1 (en)
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US6959569B2 (en) * 2002-09-26 2005-11-01 Newfrey Llc Re-keyable lock assembly
US7007528B2 (en) * 2004-04-01 2006-03-07 Newfrey Llc Re-keyable lock cylinder
DE102006049161A1 (en) * 2006-10-18 2008-04-24 Sms Demag Ag Roll stand with support and / or work rolls for rolling sheets or strips
CN102615110A (en) * 2012-04-13 2012-08-01 山西百一机械设备制造有限公司 Pressing roller cooling device used for precision strip mill
DE102016122498A1 (en) 2016-11-22 2018-05-24 Sms Group Gmbh Method for the hydrostatic support of work rolls for the cold rolling of high-strength and / or thin strips

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Also Published As

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DE3811952A1 (en) 1989-10-19
JPH0215807A (en) 1990-01-19
EP0337145B1 (en) 1992-12-02
DE58902842D1 (en) 1993-01-14
JP2716517B2 (en) 1998-02-18
US4996858A (en) 1991-03-05
ES2037299T3 (en) 1993-06-16
EP0337145A3 (en) 1990-04-04
ATE82880T1 (en) 1992-12-15

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