EP1500442B1 - Bending device for the rolls of a multi-roll stand - Google Patents

Bending device for the rolls of a multi-roll stand Download PDF

Info

Publication number
EP1500442B1
EP1500442B1 EP04009765A EP04009765A EP1500442B1 EP 1500442 B1 EP1500442 B1 EP 1500442B1 EP 04009765 A EP04009765 A EP 04009765A EP 04009765 A EP04009765 A EP 04009765A EP 1500442 B1 EP1500442 B1 EP 1500442B1
Authority
EP
European Patent Office
Prior art keywords
adjusting sleeve
sleeves
outer adjusting
annular chamber
bending
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP04009765A
Other languages
German (de)
French (fr)
Other versions
EP1500442A1 (en
Inventor
Axel Barten Dipl.-Ing. Eth
Eberhard Ing. Hambloch
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.)
Achenbach Buschhetten GmbH and Co KG
Original Assignee
Achenbach Buschhetten GmbH and Co KG
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 Achenbach Buschhetten GmbH and Co KG filed Critical Achenbach Buschhetten GmbH and Co KG
Publication of EP1500442A1 publication Critical patent/EP1500442A1/en
Application granted granted Critical
Publication of EP1500442B1 publication Critical patent/EP1500442B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B29/00Counter-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 bending device for the rolls, in particular the work rolls of a multi-roll stand with in the stator windows blockwise arranged actuators, the on the roll chocks bending forces to the positive and Negative bending of the rollers exercise.
  • DE 196 20 704 C1 describes a Sextowalzgerüst with an upper and a lower support roller, an upper and a lower work roll and an upper and a lower Intermediate roller, a device for balancing the Back-up rolls, a bending device of the generic type for Work rolls and intermediate rolls, facilities for mutual axial displacement of the work and / or Intermediate rolls as well as with facilities for a horizontal Parallel displacement of the work rolls or intermediate rolls.
  • From DE 199 38 217 C2 is a bending device for the Work rolls of a rolling stand known with in lateral Roller stands provided guide blocks for two vertically adjustable pressure transferring body to which the work rolls supported by chocks, and with two each between the Pressure transmission bodies arranged bending cylinders, the one on a pressure transmitting body attacking piston rod and one formed by the other pressure transmitting body Have cylinder.
  • the hot rolling mill described in EP 1 181 114 B1 is equipped with blocks arranged in the pedestal windows, provided as bending devices hydraulic Piston-cylinder units have over linearly displaceable Guide pieces on the work roll chocks bending forces transfer.
  • Each block is a double-acting hydraulic Cylinder unit provided, whose both ends with the Guide pieces are connected, and embrace the guide pieces with guide grooves on both sides of the free ends of noses Work roll chocks, wherein the guide grooves of Guide pieces an axial displacement of the work rolls allow.
  • Roll benders for rolling stands according to the state
  • the technique requires a relatively large amount of space.
  • the hydraulic adjusting cylinder units for applying the Bending forces on the work roll chocks are technical consuming, and the installation of the rolling stands required as a result of needed numerous hydraulic connections a large Time required, which in turn leads to a corresponding increase in Installation costs leads.
  • the invention is based on the object Roll bending device, in particular a Stripper bending device for multi-roll stands with one minimal space requirement and simple hydraulic actuators with a high reliability for applying the To develop bending forces on the roll chocks.
  • the roll bending device according to the invention is characterized by the following advantages:
  • pressurized oil with each other nested adjusting sleeves as actuators for transmitting the by the pressure oil generated bending forces on the Roll chocks, in particular the work roll chocks for a positive and a negative bending of the work rolls allows a compact design of the bending device and a large guide length of the adjusting sleeves during the bending process, the one optimal support of the used as actuators Adjusting sleeves and the work roll chocks causes.
  • the Quartowalzgerüst 1 after the Fign. 1 to 3 is with a upper and a lower work roll 2, 3 equipped in Work roll chocks 4, 5 are stored, as well as with a upper of a lower support roller 6, 7, in Support roll chocks 8, 9 store.
  • the adjusting sleeve units 13 have a parallel to vertical roll axis plane 14-14 built-in guide column 15th on, which consists of an upper and a lower fixed piston 16, 17, the holders 18, 19 of the roll stand 10, 11 are fixed and the piston rods 20, 21st are screwed together.
  • Each adjusting sleeve unit 13 further comprises an upper and a lower inner adjusting sleeve 22, 23 with a gripping nose 26th having square top plate 24, 25, a cylindrical Middle part 27, 28 and a cylindrical shaft 29, 30.
  • Die inner adjusting sleeves 22, 23 have stepped, cylindrical Bores 31a, 31b; 32a, 32b for vertical displacement on the upper and lower pistons 16, 17 and their piston rods 20, 21st
  • the upper piston 16, the piston rod 20 and the upper inner adjusting sleeve 22 form an upper annular chamber 33
  • the lower piston 17, the piston rod 21 and the lower inner Adjusting sleeve 23 form a lower annular chamber 34.
  • the over channels 35, 36 in the piston rods 20, 21 interconnected Ring chambers 33, 34 of the adjusting sleeve units 13 are pressurized oil for execution in the direction of arrow a, b to the inside directed adjusting movement of the noses 26 to the Outer surfaces 39 of support lugs 37, 38 of the Work roll chocks 4, 5 engaging inner control sleeves 22, 23 for a negative bending of the work rolls 2, 3 acted upon.
  • Each adjusting sleeve unit 13 is further provided with two others coaxial with the two inner adjusting sleeves 22, 23 between the Head plates 24, 25 arranged outer adjusting sleeves 40, 41 with a quadrangular outer contour 42 equipped, both Adjusting sleeves 40, 41 an inwardly directed, cylindrical Approach 43, 44, the lower outer adjusting sleeve 41 with their approach 44 and a sealing ring 45 in an annular space 46 of immersed upper outer adjusting sleeve 40 and with this one closed annular chamber 47 forms, the upper outer adjusting sleeve 40 with its stepped bore wall 48a, 48b on the Middle part 27 and the shaft 29 of the upper inner adjusting sleeve 22nd and with the cylindrical projection 43 on the shaft 30 of the lower inner adjusting sleeve 23 and the lower outer adjusting sleeve 41 with its cylindrical projection 44 on the central part 28 of the lower inner adjusting sleeve 23, the cylindrical projection 43 of the upper outer adjusting sleeve 40 and in the annular space 46 thereof is vertically displaceable
  • the one from the two outside Adjusting sleeves 40, 41 formed annular chamber 47 is with pressure oil to Execution of a directed in the direction of arrow c, d adjusting movement by means of stop edges 49, 50 on the inner surfaces 51 of Support lugs 37, 38 of the work roll chocks 4, 5 engaging outer adjusting sleeves 40, 41 for a positive Bending of the work rolls 2, 3 acted upon.
  • the work roll bender is equipped with a device for releasing the gripping lugs 26 of the inner adjusting sleeves 22, 23 and the stop edges 49, 50 of the outer adjusting sleeves 40, 41 of Stellhülsenhowen 13 of the support lugs 37, 38 of Work roll chocks 4, 5 when removing the work rolls 2, 3 equipped.
  • the device for releasing the work roll chocks 4, 5 has one of the upper inner Adjusting sleeve 22 and the upper outer adjusting sleeve 40 formed Ring chamber 52 and one in the annular space 46 of the upper outer Adjusting sleeve 40 with the cylindrical projection 44 of the lower outer adjusting sleeve 41 formed annular chamber 53 which through the Sealing ring 45 on the cylindrical extension 44 of the lower outer Adjustment sleeve 41 against the annular chamber 47 for the positive bend the work rolls 2, 3 and by a further sealing frame 54th is sealed at the upper outer adjusting sleeve 40 to the outside.
  • the two annular chambers 52, 53 are connected by a channel 55 in the upper outer adjusting sleeve 40 connected to each other and with Pressurized oil acted upon.
  • the pressurized in the axial direction Ring surfaces 52a, 52b of the upper inner adjusting sleeve 22nd and the upper outer adjusting sleeve 40 formed annular chamber 52nd are larger than those pressurized in the axial direction Ring surfaces 53 a, 53 b of the cylindrical projection 44 of the lower outer adjusting sleeve 41 and the upper outer adjusting sleeve 40 formed annular chamber 53, such that on the upper inner adjusting sleeve 22 and the upper outer adjusting sleeve 40 acting Actuating force greater than that on the lower outer adjusting sleeve 41st acting force is.
  • This power ratio causes in that when the two annular chambers 52, 53 are pressurized with oil for a work roll change the upper inner adjusting sleeve 22 in Arrow direction c up against the fixed upper piston 16 and the two outer adjusting sleeves 40, 41 together with the lower inner adjusting sleeve 23 against the fixed lower Pistons 17 are moved in the direction of arrow d down, so that the gripping lugs 26 of the upper and the lower inner Adjusting sleeve 22, 23 and the upper outer adjusting sleeve 40 with the Stop edge 49 of the support lugs 37, 38 of the upper and lower work roll chock 4, 5 solve and then the lower outer adjusting sleeve 41 by acting on this, by the pressure in the annular chamber 53 generated force and the Upper outer adjusting sleeve 40 against the acting on this, by the pressure in the annular chamber 52 generated force around a small stroke of a few millimeters in the direction of the arrow c are lifted up and the lower outer Adjusting sleeve 41 with its
  • the annular chambers 52,53 are for or during the entire Walzenchincicvorgangs pressurized to the off or Installation position of the adjusting sleeves 22, 23; 40, 41 to fix and sufficient clearance to the support lugs 37, 38 of the Work roll chocks 4, 5 to ensure.
  • the inner adjusting sleeves 22, 23 and the outer adjusting sleeves 40, 41 of the adjusting cylinder units 13 of the bending device are with wear plates 56-59 on guides 60 in the windows 12 the roll stand 10, 11 of the four-high stand 1 slidably arranged (Fig. 3).
  • the outer adjusting sleeves 40, 41 with their quadrangular Outer contour 42 have contact and guide surfaces 61, 62 for the Work roll chocks 4, 5, wherein the investment and Guide surfaces 61, 62 of the adjusting sleeves 40, 41 in addition as serve rotation for the adjusting sleeve unit 13.
  • the lugs 26 of the lower inner adjusting sleeves 23 of the Adjusting sleeve units 13 for the negative work roll bending form rail sections of the inner rails for off and Retracting the work rolls 2, 3 with the double wheels equipped work roll chocks 4, 5 at Work roll change. Gaps and edge breaks on the Inner rails are characterized by the double wheels of the Work roll chocks overcome.
  • the of the guide column 15, the two inner adjusting sleeves 22, 23 and the upper outer adjusting sleeve 40 formed chamber 63rd as well as the lower inner adjusting sleeve 23 and the two outer adjusting sleeves 40, 41 formed chamber 64 of the Stellhülseniseren 13 are via channels 65, 66 in the Guide post 15 and in the lower inner adjusting sleeve 23rd vented (Fig. 1).
  • the work roll bending device with in pairs in the guide columns 15 of the adjusting sleeve units 13 in the windows 12 of the two roll stands 10, 11 of the Quarto roll stand 1 built-in hydraulic prestressing cylinders 67, 68 are equipped, the cylinder chambers 69, 70 via not shown channels in the guide columns 15 with each other are connected and their adjusting piston 71, 72 on the chocks 8, 9 of the upper and lower support rollers 6, 7 act.
  • the Biasing cylinders 67, 68 are provided with return springs 73 for a Return of the actuating piston 71, 72 when removing the support rollers 6, 7 equipped.
  • the biasing cylinders 67, 68 are used for Preloading the Quartowalzgerüstes 1, to balance the upper support roller 6 and for lifting the upper support roller 6 at Removal and installation of the work rolls 2, 3.

Abstract

A deflection unit for rollers of a multi-roller frame has actuators in a block arrangement in a stand frame. These exert bending forces on the roller insert sections. The forces cause positive or negative flexure of the roller, especially the working roller.

Description

Die Erfindung betrifft eine Biegevorrichtung für die Walzen, insbesondere die Arbeitswalzen eines Mehrwalzengerüstes mit in den Ständerfenstern blockweise angeordneten Stellgliedern, die auf die Walzeneinbaustücke Biegekräfte zum positiven und negativen Biegen der Walzen ausüben.The invention relates to a bending device for the rolls, in particular the work rolls of a multi-roll stand with in the stator windows blockwise arranged actuators, the on the roll chocks bending forces to the positive and Negative bending of the rollers exercise.

Die DE 196 20 704 C1 beschreibt ein Sextowalzgerüst mit einer oberen und einer unteren Stützwalze, einer oberen und einer unteren Arbeitswalze und einer oberen und einer unteren Zwischenwalze, einer Einrichtung zum Ausbalancieren der Stützwalzen, einer Biegevorrichtung der gattungsgemäßen Art für die Arbeitswalzen und die Zwischenwalzen, Einrichtungen zur gegenseitigen axialen Verschiebung der Arbeits- und/oder Zwischenwalzen sowie mit Einrichtungen für eine horizontale Parallelverschiebung der Arbeitswalzen oder Zwischenwalzen. In die Fenster der beiden Walzenständer des Sextowalzgerüstes sind Funktionseinheiten mit je vier symmetrisch und parallel zur Walzenachsenebene angeordneten, hydraulischen Stellzylindereinheiten integriert, wobei jede Stellzylindereinheit aus einem oberen Stellzylinder mit einem oberen, auf das Einbaustück der oberen Stützwalze wirkenden Stellkolben und einem unteren Stellzylinder mit einem unteren, auf das Einbaustück der unteren Stützwalze wirkenden Stellkolben zum Ausbalancieren der oberen Stützwalze besteht. Die beiden Stellzylinder jeder Stellzylindereinheit sind koaxial in einem gemeinsamen Zylindergehäuse eingebaut, das durch einen Boden in zwei Zylinderkammern aufgeteilt ist. Auf den Stellzylindern der Stellzylindereinheiten sind hydraulisch verschiebbare, doppeltwirkende, eine Biegung der Zwischenwalzen und der Arbeitswalzen bewirkende Stellhülsen angeordnet, die mittels Nasen an den Einbaustücken der Zwischenwalzen und der Arbeitswalzen angreifen.DE 196 20 704 C1 describes a Sextowalzgerüst with an upper and a lower support roller, an upper and a lower work roll and an upper and a lower Intermediate roller, a device for balancing the Back-up rolls, a bending device of the generic type for Work rolls and intermediate rolls, facilities for mutual axial displacement of the work and / or Intermediate rolls as well as with facilities for a horizontal Parallel displacement of the work rolls or intermediate rolls. In the windows of the two roll stand of the Sextowalzgerüstes are Functional units with four symmetrical and parallel to each Roll axis plane arranged, hydraulic Stellzylindereinheiten integrated, with each Stellzylindereinheit from an upper actuating cylinder with a upper, acting on the chock of the upper support roller Actuating piston and a lower actuating cylinder with a lower, on the chock of the lower support roller acting actuator piston to balance the upper support roller. The two Stellzylinder each Stellzylindereinheit are coaxial in one common cylinder housing fitted through a floor in split two cylinder chambers. On the adjusting cylinders of the Stellzylindereinheiten are hydraulically displaceable, double acting, a bend of intermediate rolls and the Work rolls causing adjusting sleeves arranged by means of Noses on the chocks of the intermediate rolls and the Attack work rolls.

Aus der DE 199 38 217 C2 ist eine Biegevorrichtung für die Arbeitswalzen eines Walzgerüstes bekannt mit in seitlichen Walzenständern vorgesehenen Führungsblöcken für je zwei vertikal verstellbare Druckübertragungskörper, an denen die Arbeitswalzen über Einbaustücke abgestützt sind, und mit je zwei zwischen den Druckübertragungskörpern angeordneten Biegezylindern, die eine an einem Druckübertragungskörper angreifende Kolbenstange und einen vom jeweils anderen Druckübertragungskörper gebildeten Zylinder aufweisen.From DE 199 38 217 C2 is a bending device for the Work rolls of a rolling stand known with in lateral Roller stands provided guide blocks for two vertically adjustable pressure transferring body to which the work rolls supported by chocks, and with two each between the Pressure transmission bodies arranged bending cylinders, the one on a pressure transmitting body attacking piston rod and one formed by the other pressure transmitting body Have cylinder.

Das in der EP 1 181 114 B1 beschriebene Warmwalzgerüst ist mit in den Ständerfenstern angeordneten Blöcken ausgestattet, die als Biegevorrichtungen vorgesehene hydraulische Kolbenzylindereinheiten aufweisen, die über linear verschiebbare Führungsstücke auf die Arbeitswalzeneinbaustücke Biegekräfte übertragen. Je Block ist eine doppeltwirkende hydraulische Zylindereinheit vorgesehen, deren beide Enden mit den Führungsstücken verbunden sind, und die Führungsstücke umgreifen mit Führungsnuten beidseitig die freien Enden von Nasen der Arbeitswalzeneinbaustücke, wobei die Führungsnuten der Führungsstücke eine axiale Verschiebung der Arbeitswalzen zulassen.The hot rolling mill described in EP 1 181 114 B1 is equipped with blocks arranged in the pedestal windows, provided as bending devices hydraulic Piston-cylinder units have over linearly displaceable Guide pieces on the work roll chocks bending forces transfer. Each block is a double-acting hydraulic Cylinder unit provided, whose both ends with the Guide pieces are connected, and embrace the guide pieces with guide grooves on both sides of the free ends of noses Work roll chocks, wherein the guide grooves of Guide pieces an axial displacement of the work rolls allow.

Die Walzenbiegevorrichtungen für Walzgerüste nach dem Stand der Technik erfordern einen verhältnismäßig großen Platzbedarf. Die hydraulischen Stellzylindereinheiten zum Aufbringen der Biegekräfte auf die Arbeitswalzeneinbaustücke sind technisch aufwendig, und die Montage der Walzgerüste erfordert infolge der benötigten zahlreichen Hydraulikanschlüsse einen großen Zeitbedarf, was wiederum zu einem entsprechenden Anstieg der Montagekosten führt.Roll benders for rolling stands according to the state The technique requires a relatively large amount of space. The hydraulic adjusting cylinder units for applying the Bending forces on the work roll chocks are technical consuming, and the installation of the rolling stands required as a result of needed numerous hydraulic connections a large Time required, which in turn leads to a corresponding increase in Installation costs leads.

Der Erfindung liegt die Aufgabe zugrunde, eine Walzenbiegevorrichtung, insbesondere eine Arbeitswalzenbiegevorrichtung für Mehrwalzengerüste mit einem minimalen Platzbedarf und einfachen hydraulischen Stellgliedern mit einer hohen Betriebssicherheit zum Aufbringen der Biegekräfte auf die Walzeneinbaustücke zu entwickeln.The invention is based on the object Roll bending device, in particular a Stripper bending device for multi-roll stands with one minimal space requirement and simple hydraulic actuators with a high reliability for applying the To develop bending forces on the roll chocks.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Biegevorrichtung für die Walzen, insbesondere Arbeitswalzen eines Mehrwalzengerüstes mit den Merkmalen des Patentanspruches 1.This object is achieved by a Bending device for the rollers, in particular work rolls a multi-roll stand with the features of claim 1.

Die Unteransprüche beinhalten zweckmäßige und vorteilhafte Weiterbildungen der Erfindung.The subclaims include expedient and advantageous Further developments of the invention.

Die erfindungsgemäße Walzenbiegevorrichtung zeichnet sich durch folgende Vorteile aus:The roll bending device according to the invention is characterized by the following advantages:

Die Verwendung von druckölbetätigten, miteinander verschachtelten Stellhülsen als Stellglieder zum Übertragen der durch das Drucköl erzeugten Biegekräfte auf die Walzeneinbaustücke, insbesondere die Arbeitswalzeneinbaustücke für eine positive und eine negative Biegung der Arbeitswalzen ermöglicht eine kompakte Bauweise der Biegevorrichtung und eine große Führungslänge der Stellhülsen beim Biegevorgang, die eine optimale Abstützung der als Stellglieder eingesetzten Stellhülsen und der Arbeitswalzeneinbaustücke bewirkt. Durch eine hydraulische Verbindung der durch die Stellhülsen gebildeten Druckkammern für eine positive und eine negative Arbeitswalzenbiegung sowie der von den Stellhülsen gebildeten Druckkammern zum Lösen der Nasen und Anschlagkanten der an Stützansätzen der Arbeitswalzeneinbaustücke angreifenden Stellhülsen beim Arbeitswalzenwechsel wird eine erhebliche bauliche Vereinfachung der Arbeitswalzenbiegevorrichtung erreicht, die zu einer vereinfachten, schnelleren Montage und somit zu einer Minimierung der Montagekosten der Walzgerüste führt. Schließlich können die durch Drucköl in Axialrichtung beaufschlagten Ringflächen der Druckkammern der Stellhülsen zum vertikalen Verschieben derselben derart dimensioniert werden, daß die Walzenbiegevorrichtung mit Niederdruck betrieben werden kann. Dies hat den Vorteil, daß als Druckmedium für den Betrieb der Walzenbiegevorrichtung Walzöl verwendet werden kann. Durch die Verwendung von Walzöl wird wiederum ausgeschlossen, daß bei in der Walzenbiegevorrichtung gegebenenfalls auftretenden Leckagen eine unerwünschte Vermischung des für den Walzbetrieb erforderlichen Walzöls mit einem Fremdöl erfolgt, wie dies bei Walzwerken der Fall ist, bei denen für den Betrieb der Walzenbiegevorrichtungen ein besonderes Hydrauliköl zum Einsatz kommt.The use of pressurized oil, with each other nested adjusting sleeves as actuators for transmitting the by the pressure oil generated bending forces on the Roll chocks, in particular the work roll chocks for a positive and a negative bending of the work rolls allows a compact design of the bending device and a large guide length of the adjusting sleeves during the bending process, the one optimal support of the used as actuators Adjusting sleeves and the work roll chocks causes. By a hydraulic connection through the adjusting sleeves formed pressure chambers for a positive and a negative Work roll bending as well as that formed by the adjusting sleeves Pressure chambers for releasing the noses and stop edges of the Supporting lugs of the work roll chocks engaging Stellhülsen the work roll change is a significant Structural simplification of the work roll bending device achieved, resulting in a simplified, faster assembly and thus minimizing the assembly costs of the rolling stands leads. Finally, the pressure oil in the axial direction acted upon annular surfaces of the pressure chambers of the adjusting sleeves for vertical displacement of the same be dimensioned so that the roll bending device are operated at low pressure can. This has the advantage that as a printing medium for the operation the roll bending device rolling oil can be used. By the use of rolling oil is again excluded that at possibly occurring in the roll bending device Leaks an undesirable mixing of the for the rolling operation required rolling oil with a foreign oil, as with Rolling mills is the case in which to operate the Roll benders a special hydraulic oil used comes.

Die Erfindung ist nachstehend anhand der Arbeitswalzenbiegevorrichtung eines Quartowalzgerüstes erläutert. Die Beschreibung nimmt Bezug auf schematische Zeichnungsfiguren, die folgendes darstellen:

Fign. 1 bis 3
Vertikalschnitte einer Stellhülseneinheit der in das Fenster eines Walzenständers eines Quartowalzgerüstes eingebauten Arbeitswalzenbiegevorrichtung mit den Betriebsstellungen neuer Walzen sowie abgeschliffener Walzen und mit der Ausbaustellung der Walzen,
Fig. 4
einen Horizontalschnitt der Stellhülseneinheit nach Linie IV-IV der Fig. 1,
Fig. 5
einen Horizontalschnitt der Stellhülseneinheit nach Linie V-V der Fig. 1 und
Fig. 6
einen der Fig. 1 entsprechenden Vertikalschnitt einer mit Vorspannzylindern ausgerüsteten Stellhülseneinheit der Arbeitswalzenbiegevorrichtung.
The invention is explained below with reference to the work roll bending device of a four-high rolling stand. The description refers to schematic drawings, which show:
FIGS. 1 to 3
Vertical sections of an adjusting sleeve unit of the work roll bending device installed in the window of a roll stand of a four-high rolling stand with the operating positions of new rolls and ground rolls and with the configuration of the rolls,
Fig. 4
1 a horizontal section of the adjusting sleeve unit according to line IV-IV of FIG. 1,
Fig. 5
a horizontal section of the adjusting sleeve unit according to line VV of Fig. 1 and
Fig. 6
1 corresponding vertical section of an equipped with pretensioning cylinders adjusting sleeve unit of the work roll bending device.

Das Quartowalzgerüst 1 nach den Fign. 1 bis 3 ist mit einer oberen und einer unteren Arbeitswalze 2, 3 ausgerüstet, die in Arbeitswalzeneinbaustücken 4, 5 gelagert sind, sowie mit einer oberen einer unteren Stützwalze 6, 7, die in Stützwalzeneinbaustücken 8, 9 lagern.The Quartowalzgerüst 1 after the Fign. 1 to 3 is with a upper and a lower work roll 2, 3 equipped in Work roll chocks 4, 5 are stored, as well as with a upper of a lower support roller 6, 7, in Support roll chocks 8, 9 store.

In die Fenster 12 der beiden Walzenständer 10, 11 des Quartowalzgerüstes 1 sind jeweils zwei Stellhülseneinheiten 13, 13 einer Arbeitswalzenbiegevorrichtung integriert.In the window 12 of the two roll stand 10, 11 of the Quarto roll stand 1 are each two adjusting sleeve units 13, 13 integrated a work roll bending device.

Die Stellhülseneinheiten 13 weisen eine parallel zur vertikalen Walzenachsenebene 14-14 eingebaute Führungssäule 15 auf, die aus einem oberen und einem unteren feststehenden Kolben 16, 17 besteht, die an Halterungen 18, 19 der Walzenständer 10, 11 befestigt sind und deren Kolbenstangen 20, 21 zusammengeschraubt sind.The adjusting sleeve units 13 have a parallel to vertical roll axis plane 14-14 built-in guide column 15th on, which consists of an upper and a lower fixed piston 16, 17, the holders 18, 19 of the roll stand 10, 11 are fixed and the piston rods 20, 21st are screwed together.

Jede Stellhülseneinheit 13 umfaßt ferner eine obere und eine untere innere Stellhülse 22, 23 mit einer eine Greifnase 26 aufweisenden viereckigen Kopfplatte 24, 25, einem zylindrischen Mittelteil 27, 28 und einem zylindrischen Schaft 29, 30. Die inneren Stellhülsen 22, 23 besitzen abgestufte, zylindrische Bohrungen 31a, 31b; 32a, 32b zum vertikalen Verschieben auf dem oberen und dem unteren Kolben 16, 17 und deren Kolbenstangen 20, 21.Each adjusting sleeve unit 13 further comprises an upper and a lower inner adjusting sleeve 22, 23 with a gripping nose 26th having square top plate 24, 25, a cylindrical Middle part 27, 28 and a cylindrical shaft 29, 30. Die inner adjusting sleeves 22, 23 have stepped, cylindrical Bores 31a, 31b; 32a, 32b for vertical displacement on the upper and lower pistons 16, 17 and their piston rods 20, 21st

Der obere Kolben 16, dessen Kolbenstange 20 und die obere innere Stellhülse 22 bilden eine obere Ringkammer 33, und der untere Kolben 17, dessen Kolbenstange 21 und die untere innere Stellhülse 23 bilden eine untere Ringkammer 34. Die über Kanäle 35, 36 in den Kolbenstangen 20, 21 miteinander verbundenen Ringkammern 33, 34 der Stellhülseneinheiten 13 sind mit Drucköl zur Ausführung einer in Pfeilrichtung a, b nach innen gerichteten Stellbewegung der mittels der Nasen 26 an den Außenflächen 39 von Stützansätzen 37, 38 der Arbeitswalzeneinbaustücke 4, 5 angreifenden inneren Stellhülsen 22, 23 für eine negative Biegung der Arbeitswalzen 2, 3 beaufschlagbar.The upper piston 16, the piston rod 20 and the upper inner adjusting sleeve 22 form an upper annular chamber 33, and the lower piston 17, the piston rod 21 and the lower inner Adjusting sleeve 23 form a lower annular chamber 34. The over channels 35, 36 in the piston rods 20, 21 interconnected Ring chambers 33, 34 of the adjusting sleeve units 13 are pressurized oil for execution in the direction of arrow a, b to the inside directed adjusting movement of the noses 26 to the Outer surfaces 39 of support lugs 37, 38 of the Work roll chocks 4, 5 engaging inner control sleeves 22, 23 for a negative bending of the work rolls 2, 3 acted upon.

Jede Stellhülseneinheit 13 ist ferner mit zwei weiteren koaxial zu den beiden inneren Stellhülsen 22, 23 zwischen deren Kopfplatten 24, 25 angeordneten äußeren Stellhülsen 40, 41 mit einer viereckigen Außenkontur 42 ausgerüstet, wobei beide Stellhülsen 40, 41 einen nach innen gerichteten, zylindrischen Ansatz 43, 44 aufweisen, die untere äußere Stellhülse 41 mit ihrem Ansatz 44 und einem Dichtring 45 in einen Ringraum 46 der oberen äußeren Stellhülse 40 eintaucht und mit diesem eine geschlossene Ringkammer 47 bildet, die obere äußere Stellhülse 40 mit ihrer abgestuften Bohrungswand 48a, 48b auf dem Mittelteil 27 und dem Schaft 29 der oberen inneren Stellhülse 22 und mit dem zylindrischen Ansatz 43 auf dem Schaft 30 der unteren inneren Stellhülse 23 und die untere äußere Stellhülse 41 mit ihrem zylindrischen Ansatz 44 auf dem Mittelteil 28 der unteren inneren Stellhülse 23, dem zylindrischen Ansatz 43 der oberen äußeren Stellhülse 40 und in dem Ringraum 46 derselben vertikal verschiebbar ist. Die von den beiden äußeren Stellhülsen 40, 41 gebildete Ringkammer 47 ist mit Drucköl zur Ausführung einer in Pfeilrichtung c, d gerichteten Stellbewegung der mittels Anschlagkanten 49, 50 an den Innenflächen 51 der Stützansätze 37, 38 der Arbeitswalzeneinbaustücke 4, 5 angreifenden äußeren Stellhülsen 40, 41 für eine positive Biegung der Arbeitswalzen 2, 3 beaufschlagbar.Each adjusting sleeve unit 13 is further provided with two others coaxial with the two inner adjusting sleeves 22, 23 between the Head plates 24, 25 arranged outer adjusting sleeves 40, 41 with a quadrangular outer contour 42 equipped, both Adjusting sleeves 40, 41 an inwardly directed, cylindrical Approach 43, 44, the lower outer adjusting sleeve 41 with their approach 44 and a sealing ring 45 in an annular space 46 of immersed upper outer adjusting sleeve 40 and with this one closed annular chamber 47 forms, the upper outer adjusting sleeve 40 with its stepped bore wall 48a, 48b on the Middle part 27 and the shaft 29 of the upper inner adjusting sleeve 22nd and with the cylindrical projection 43 on the shaft 30 of the lower inner adjusting sleeve 23 and the lower outer adjusting sleeve 41 with its cylindrical projection 44 on the central part 28 of the lower inner adjusting sleeve 23, the cylindrical projection 43 of the upper outer adjusting sleeve 40 and in the annular space 46 thereof is vertically displaceable. The one from the two outside Adjusting sleeves 40, 41 formed annular chamber 47 is with pressure oil to Execution of a directed in the direction of arrow c, d adjusting movement by means of stop edges 49, 50 on the inner surfaces 51 of Support lugs 37, 38 of the work roll chocks 4, 5 engaging outer adjusting sleeves 40, 41 for a positive Bending of the work rolls 2, 3 acted upon.

Die Arbeitswalzenbiegevorrichtung ist mit einer Einrichtung zum Lösen der Greifnasen 26 der inneren Stellhülsen 22, 23 und der Anschlagkanten 49, 50 der äußeren Stellhülsen 40, 41 der Stellhülseneinheiten 13 von den Stützansätzen 37, 38 der Arbeitswalzeneinbaustücke 4, 5 beim Ausbau der Arbeitswalzen 2, 3 ausgestattet. Die Einrichtung zur-Freigabe der-Arbeitswalzeneinbaustücke 4, 5 weist eine von der oberen inneren Stellhülse 22 und der oberen äußeren Stellhülse 40 gebildete Ringkammer 52 und eine in dem Ringraum 46 der oberen äußeren Stellhülse 40 mit dem zylindrischen Ansatz 44 der unteren äußeren Stellhülse 41 gebildete Ringkammer 53 auf, die durch den Dichtring 45 am zylindrischen Ansatz 44 der unteren äußeren Stellhülse 41 gegen die Ringkammer 47 für die positive Biegung der Arbeitswalzen 2, 3 und durch einen weiteren Dichtrahmen 54 an der oberen äußeren Stellhülse 40 nach außen abgedichtet ist. The work roll bender is equipped with a device for releasing the gripping lugs 26 of the inner adjusting sleeves 22, 23 and the stop edges 49, 50 of the outer adjusting sleeves 40, 41 of Stellhülseneinheiten 13 of the support lugs 37, 38 of Work roll chocks 4, 5 when removing the work rolls 2, 3 equipped. The device for releasing the work roll chocks 4, 5 has one of the upper inner Adjusting sleeve 22 and the upper outer adjusting sleeve 40 formed Ring chamber 52 and one in the annular space 46 of the upper outer Adjusting sleeve 40 with the cylindrical projection 44 of the lower outer adjusting sleeve 41 formed annular chamber 53 which through the Sealing ring 45 on the cylindrical extension 44 of the lower outer Adjustment sleeve 41 against the annular chamber 47 for the positive bend the work rolls 2, 3 and by a further sealing frame 54th is sealed at the upper outer adjusting sleeve 40 to the outside.

Die beiden Ringkammern 52, 53 sind durch einen Kanal 55 in der oberen äußeren Stellhülse 40 miteinander verbunden und mit Drucköl beaufschlagbar. Die in Axialrichtung druckbeaufschlagten Ringflächen 52a, 52b der von der oberen inneren Stellhülse 22 und der oberen äußeren Stellhülse 40 gebildeten Ringkammer 52 sind größer als die in Axialrichtung druckbeaufschlagten Ringflächen 53a, 53b der von dem zylindrischen Ansatz 44 der unteren äußeren Stellhülse 41 und der oberen äußeren Stellhülse 40 gebildeten Ringkammer 53, derart, daß die auf die obere innere Stellhülse 22 und die obere äußere Stellhülse 40 wirkende Stellkraft größer als die auf die untere äußere Stellhülse 41 wirkende Stellkraft ist. Dieses Stellkraftverhältnis bewirkt, daß beim Beaufschlagen der beiden Ringkammern 52, 53 mit Drucköl für einen Arbeitswalzenwechsel die obere innere Stellhülse 22 in Pfeilrichtung c nach oben gegen den feststehenden oberen Kolben 16 und die beiden äußeren Stellhülsen 40, 41 zusammen mit der unteren inneren Stellhülse 23 gegen den feststehenden unteren Kolben 17 in Pfeilrichtung d nach unten verschoben werden, so daß sich die Greifnasen 26 der oberen und der unteren inneren Stellhülse 22, 23 und die obere äußere Stellhülse 40 mit der Anschlagkante 49 von den Stützansätzen 37, 38 des oberen und des unteren Arbeitswalzeneinbaustücks 4, 5 lösen und anschließend die untere äußere Stellhülse 41 durch die auf diese wirkende, durch den Druck in der Ringkammer 53 erzeugte Stellkraft und die obere äußere Stellhülse 40 entgegen der auf diese wirkenden, durch den Druck in der Ringkammer 52 erzeugten Stellkraft um einen kleinen Stellhub von wenigen Millimetern in Pfeilrichtung c nach oben angehoben werden und sich die untere äußere Stellhülse 41 mit ihrer Anschlagkante 50 von dem Stützansatz 38 des unteren Arbeitswalzeneinbaustückes 5 löst (Fig. 3).The two annular chambers 52, 53 are connected by a channel 55 in the upper outer adjusting sleeve 40 connected to each other and with Pressurized oil acted upon. The pressurized in the axial direction Ring surfaces 52a, 52b of the upper inner adjusting sleeve 22nd and the upper outer adjusting sleeve 40 formed annular chamber 52nd are larger than those pressurized in the axial direction Ring surfaces 53 a, 53 b of the cylindrical projection 44 of the lower outer adjusting sleeve 41 and the upper outer adjusting sleeve 40 formed annular chamber 53, such that on the upper inner adjusting sleeve 22 and the upper outer adjusting sleeve 40 acting Actuating force greater than that on the lower outer adjusting sleeve 41st acting force is. This power ratio causes in that when the two annular chambers 52, 53 are pressurized with oil for a work roll change the upper inner adjusting sleeve 22 in Arrow direction c up against the fixed upper piston 16 and the two outer adjusting sleeves 40, 41 together with the lower inner adjusting sleeve 23 against the fixed lower Pistons 17 are moved in the direction of arrow d down, so that the gripping lugs 26 of the upper and the lower inner Adjusting sleeve 22, 23 and the upper outer adjusting sleeve 40 with the Stop edge 49 of the support lugs 37, 38 of the upper and lower work roll chock 4, 5 solve and then the lower outer adjusting sleeve 41 by acting on this, by the pressure in the annular chamber 53 generated force and the Upper outer adjusting sleeve 40 against the acting on this, by the pressure in the annular chamber 52 generated force around a small stroke of a few millimeters in the direction of the arrow c are lifted up and the lower outer Adjusting sleeve 41 with its stop edge 50 of the support extension 38th of the lower work roll chock 5 releases (Figure 3).

Beim Aus- und Einbau der Arbeitswalzen 2, 3 werden sowohl die Ringkammern 33, 34 für die negative Arbeitswalzenbiegung als auch die Ringkammer 47 für die positive Arbeitswalzenbiegung drucklos bzw. in Schwimmstellung geschaltet.When removing and installing the work rolls 2, 3 are both the annular chambers 33, 34 for the negative work roll bending as also the annular chamber 47 for the positive work roll bending depressurized or switched to floating position.

Die Ringkammern 52,53 werden für bzw. während des kompletten Walzenwechselvorgangs unter Druck gesetzt, um die Aus- bzw. Einbaustellung der Stellhülsen 22, 23; 40, 41 zu fixieren und einen ausreichenden Freiraum zu den Stützansätzen 37, 38 der Arbeitswalzeneinbaustücke 4, 5 zu gewährleisten.The annular chambers 52,53 are for or during the entire Walzenwechselvorgangs pressurized to the off or Installation position of the adjusting sleeves 22, 23; 40, 41 to fix and sufficient clearance to the support lugs 37, 38 of the Work roll chocks 4, 5 to ensure.

Die inneren Stellhülsen 22, 23 und die äußeren Stellhülsen 40, 41 der Stellzylindereinheiten 13 der Biegevorrichtung sind mit verschleißplatten 56-59 auf Führungen 60 in den Fenstern 12 der Walzenständer 10, 11 des Quartowalzgerüstes 1 verschiebbar angeordnet (Fig. 3).The inner adjusting sleeves 22, 23 and the outer adjusting sleeves 40, 41 of the adjusting cylinder units 13 of the bending device are with wear plates 56-59 on guides 60 in the windows 12 the roll stand 10, 11 of the four-high stand 1 slidably arranged (Fig. 3).

Die äußeren Stellhülsen 40, 41 mit ihrer viereckigen Außenkontur 42 weisen Anlage- und Führungsflächen 61, 62 für die Arbeitswalzeneinbaustücke 4, 5 auf, wobei die Anlage- und Führungsflächen 61, 62 der Stellhülsen 40, 41 zusätzlich als verdrehsicherung für die Stellhülseneinheit 13 dienen.The outer adjusting sleeves 40, 41 with their quadrangular Outer contour 42 have contact and guide surfaces 61, 62 for the Work roll chocks 4, 5, wherein the investment and Guide surfaces 61, 62 of the adjusting sleeves 40, 41 in addition as serve rotation for the adjusting sleeve unit 13.

Die Nasen 26 der unteren inneren Stellhülsen 23 der Stellhülseneinheiten 13 für die negative Arbeitswalzenbiegung bilden Schienenabschnitte der Innenschienen zum Aus- und Einfahren der Arbeitswalzen 2, 3 mit den mit Doppelrädern ausgestatteten Arbeitswalzeneinbaustücken 4, 5 beim Arbeitswalzenwechsel. Lücken und Kantenbrüche an den Innenschienen werden durch die Doppelräder der Arbeitswalzeneinbaustücke überwunden.The lugs 26 of the lower inner adjusting sleeves 23 of the Adjusting sleeve units 13 for the negative work roll bending form rail sections of the inner rails for off and Retracting the work rolls 2, 3 with the double wheels equipped work roll chocks 4, 5 at Work roll change. Gaps and edge breaks on the Inner rails are characterized by the double wheels of the Work roll chocks overcome.

Die von der Führungssäule 15, den beiden inneren Stellhülsen 22, 23 und der oberen äußeren Stellhülse 40 gebildete Kammer 63 sowie die von der unteren inneren Stellhülse 23 und den beiden äußeren Stellhülsen 40, 41 gebildete Kammer 64 der Stellhülseneinheiten 13 werden über Kanäle 65, 66 in der Führungssäule 15 und in der unteren inneren Stellhülse 23 entlüftet(Fig. 1).The of the guide column 15, the two inner adjusting sleeves 22, 23 and the upper outer adjusting sleeve 40 formed chamber 63rd as well as the lower inner adjusting sleeve 23 and the two outer adjusting sleeves 40, 41 formed chamber 64 of the Stellhülseneinheiten 13 are via channels 65, 66 in the Guide post 15 and in the lower inner adjusting sleeve 23rd vented (Fig. 1).

Gemäß Fig. 6 kann die Arbeitswalzenbiegevorrichtung mit paarweise in die Führungssäulen 15 der Stellhülseneinheiten 13 in den Fenstern 12 der beiden Walzenständer 10, 11 des Quartowalzgerüstes 1 eingebauten hydraulischen Vorspannzylindern 67, 68 ausgerüstet werden, deren Zylinderkammern 69, 70 über nicht dargestellte Kanäle in den Führungssäulen 15 miteinander verbunden sind und deren Stellkolben 71, 72 auf die Einbaustücke 8, 9 der oberen und der unteren Stützwalze 6, 7 wirken. Die Vorspannzylinder 67, 68 sind mit Rückstellfedern 73 für eine Rückstellung der Stellkolben 71, 72 beim Ausbau der Stützwalzen 6, 7 ausgestattet. Die Vorspannzylinder 67, 68 dienen zum Vorspannen des Quartowalzgerüstes 1, zum Ausbalancieren der oberen Stützwalze 6 und zum Anheben der oberen Stützwalze 6 beim Aus- und Einbau der Arbeitswalzen 2, 3.According to Fig. 6, the work roll bending device with in pairs in the guide columns 15 of the adjusting sleeve units 13 in the windows 12 of the two roll stands 10, 11 of the Quarto roll stand 1 built-in hydraulic prestressing cylinders 67, 68 are equipped, the cylinder chambers 69, 70 via not shown channels in the guide columns 15 with each other are connected and their adjusting piston 71, 72 on the chocks 8, 9 of the upper and lower support rollers 6, 7 act. The Biasing cylinders 67, 68 are provided with return springs 73 for a Return of the actuating piston 71, 72 when removing the support rollers 6, 7 equipped. The biasing cylinders 67, 68 are used for Preloading the Quartowalzgerüstes 1, to balance the upper support roller 6 and for lifting the upper support roller 6 at Removal and installation of the work rolls 2, 3.

Die vorbeschriebene in ein Quartowalzgerüst eingebaute Walzenbiegevorrichtung ist ferner für Sextowalzgerüste geeignet, wobei dann die Zwischenwalzenbiegevorrichtung mit Vorspannzylindern, deren Stellkräfte auf die Stützwalzeneinbaustücke des Sextowalzgerüstes wirken, ausgerüstet ist, und eine zweite Walzenbiegevorrichtung den Arbeitswalzen zugeordnet wird.The above-described built in a four-high rolling mill Roll bender is also suitable for Sextowalzgerüste, then the intermediate roll bending device with Preload cylinders, whose restoring forces on the Support roll chocks of the Sextowalzgerüstes act, is equipped, and a second roll bending device the Work rolls is assigned.

Claims (9)

  1. Bending device for the rolls, in particular the work rolls, of a multi-roll stand, having actuators which are disposed in blocks in the housing windows and exert bending forces on the roll chocks for positive and negative bending of the rolls, having respectively two adjusting sleeve units (33) integrated into the windows (12) of the two housings (10, 11) of the roll stand (1), having a guide column (15) which is incorporated parallel to the vertical roll axis plane (14-14), said guide column comprising an upper and a lower stationary piston (16, 17), the piston rods (20, 21) of which are connected to each other rigidly, an upper and a lower inner adjusting sleeve (22, 23) with a square head plate (24, 25) which has a gripping lug (26), with a cylindrical central part (27, 28) and with a cylindrical shaft (29, 30), which (22, 23) have stepped, cylindrical borings (31a, 31b; 32a, 32b) for vertical displacement of the adjusting sleeves (22, 23) on the upper and the lower piston (16, 17) and the piston rods (20, 21) thereof, an upper annular chamber (33), which is formed by the upper piston (16), the piston rod (20) thereof and the upper inner adjusting sleeve (22), and a lower annular chamber (34), which is formed by the lower piston (17), the piston rod (21) thereof and the lower inner adjusting sleeve (23), the annular chambers (33, 34), which are connected to each other via channels (35, 36) in the piston rods (20, 21) or external lines, being able to be supplied with a pressure medium in order to perform an inwardly directed adjustment movement (arrow direction a, b) of the inner adjusting sleeves (22, 23), which engage by means of the lugs (26) on the outer faces (39) of support extensions (37, 38) of the work roll chocks (4, 5) for negative bending of the work rolls (2, 3), and also having two further outer adjusting sleeves (40, 41), which are disposed coaxially to the two inner adjusting sleeves (22, 23) between the head plates (24, 25) thereof and have a square outer contour (42), both adjusting sleeves (40, 41) having an inwardly directed, cylindrical extension (43, 44), the lower outer adjusting sleeve (41) with its extension (44) plunging into an annular chamber (46) of the upper outer adjusting sleeve (40) and forming with the latter a closed annular chamber (47), the upper outer adjusting sleeve (40) being vertically displaceable with its stepped boring wall (48a, 48b) on the central part (27) and the shaft (29) of the upper inner adjusting sleeve (22) and with the cylindrical extension (43) on the shaft (30) of the lower inner adjusting sleeve (23), and the lower outer adjusting sleeve (41) being vertically displaceable with its cylindrical extension (44) on the central part (28) of the lower inner adjusting sleeve (23), on the cylindrical extension (43) of the upper outer adjusting sleeve (40) and in the annular chamber (46) of the same, and the annular chamber (47) formed by the two outer adjusting sleeves (40, 41) being able to be supplied with a pressure medium in order to perform an outwardly directed adjustment movement (arrow direction c, d) of the outer adjusting sleeves (40, 41) which engage by means of stop edges (49, 50) on the inner faces (51) of the support extensions (37, 38) of the work roll chocks (4, 5), for positive bending of the work rolls (2, 3).
  2. Bending device according to claim 1, characterised by a mechanism for releasing the gripping lugs (26) of the inner adjusting sleeves (22, 23) and the stop edges (49, 50) of the outer adjusting sleeves (40, 41) of the adjusting sleeve units (13) from the support extensions (37, 38) of the work roll chocks (4, 5) when dismantling the work rolls (2, 3), the mechanism for releasing the work roll chocks (4, 5) having an annular chamber (52), which is formed by the upper inner adjusting sleeve (22) and the upper outer adjusting sleeve (40), and an annular chamber (53), which is formed in the annular space (46) of the upper outer adjusting sleeve (40) with the cylindrical extension (44) of the lower outer adjusting sleeve (41), sealed externally by the sealing ring (45) on the cylindrical extension (44) of the lower outer adjusting sleeve (41) against the annular chamber (47) for positive bending of the work rolls (2, 3) and by a sealing frame (54) on the upper outer adjusting sleeve (40), the two annular chambers (52, 53) being connected to each other by a channel (55) in the upper outer adjusting sleeve (40) and being able to be supplied by a pressure medium and the annular faces (52a, 52b), supplied with pressure in the axial direction, of the annular chamber (52), which is formed by the upper inner adjusting sleeve (22) and the upper outer adjusting sleeve (40), being greater than the annular faces (53a, 53b), supplied with pressure in the axial direction, of the annular chamber (53), which is formed by the cylindrical extension (44) of the lower outer adjusting sleeve (41) and the upper outer adjusting sleeve (40) in such a manner that the adjustment force acting upon the upper inner adjusting sleeve (22) and upon the upper outer adjusting sleeve (40) is greater than the adjustment force acting upon the lower outer adjusting sleeve (41).
  3. Bending device according to claim 1 and 2, characterised by hydraulic pre-tensioning cylinders (67, 68), which are incorporated in pairs in the guide columns (15) of the adjusting sleeve units (13) in the windows (12) of the two housings (10, 11) of a roll stand, the cylinder chambers (69, 70) of said pre-tensioning cylinders being connected to each other via channels in the guide columns (15) or lines and the adjustment pistons (71, 72) of said pre-tensioning cylinders acting on the chocks (8, 9) of the upper and of the lower support roll (6, 7) of a four-high stand (1) or of a six-high stand.
  4. Bending device according to claim 3, characterised in that the pre-tensioning cylinders (67, 68) are equipped with restoring springs (73) for restoration of the adjustment pistons (71, 72) during dismantling of the support rolls (6, 7).
  5. Bending device according to one of the claims 1 to 4, characterised in that the outer adjusting sleeves (40, 41) with their square outer contour (42) have support and guide faces (61, 62) for the work roll chocks (4, 5), the support and guide faces (61, 62) of the adjusting sleeves (40, 41) serving in addition as an anti-rotation device for the adjusting sleeve unit (13).
  6. Bending device according to one of the claims 1 to 5, characterised in that the piston rods (20, 21) of the stationary pistons (16, 17) of the guide columns (15) are screwed together.
  7. Bending device according to one of the claims 1 to 6, characterised in that the lugs (26) of the lower inner adjusting sleeves (23) of the adjusting sleeve units (13) form, for negative work roll bending, rail portions of the inner rails for moving the work rolls (2, 3) inwards and outwards with the work roll chocks (4, 5) equipped with double wheels during work roll exchange.
  8. Bending device according to one of the claims 1 to 7, characterised in that the chamber (63), which is formed by the guide column (15), the two inner adjusting sleeves (22, 23) and the upper outer adjusting sleeve (40), and also the chamber (64) of the adjusting sleeve units (13), which is formed by the lower inner adjusting sleeve (23) and the two outer adjusting sleeves (40, 41), are vented via channels (65, 66) in the guide column (15) and in the lower inner adjusting sleeve (23).
  9. Bending device according to one of the claims 1 to 8, characterised by operation of the same with rolling oil at low operational pressure.
EP04009765A 2003-07-25 2004-04-24 Bending device for the rolls of a multi-roll stand Expired - Fee Related EP1500442B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10333883A DE10333883B3 (en) 2003-07-25 2003-07-25 Flexure control unit for rolling mill, includes actuators in roller stand frame to exert bending forces on roller insert sections, causing positive or negative flexure
DE10333883 2003-07-25

Publications (2)

Publication Number Publication Date
EP1500442A1 EP1500442A1 (en) 2005-01-26
EP1500442B1 true EP1500442B1 (en) 2005-09-28

Family

ID=32946480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04009765A Expired - Fee Related EP1500442B1 (en) 2003-07-25 2004-04-24 Bending device for the rolls of a multi-roll stand

Country Status (4)

Country Link
EP (1) EP1500442B1 (en)
AT (1) ATE305340T1 (en)
DE (2) DE10333883B3 (en)
ES (1) ES2246050T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1772203A1 (en) 2005-10-10 2007-04-11 VAI Industries (UK) Limited Roll bending device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29603117U1 (en) * 1996-02-23 1996-04-11 Achenbach Buschhuetten Gmbh Multi-roll stand
IT1301734B1 (en) * 1998-06-17 2000-07-07 Demag Italimpianti Spa ROLLER DEFLECTION DEVICE FOR ROLLING CAGES.
AT407124B (en) * 1998-10-19 2000-12-27 Voest Alpine Ind Anlagen BENDING DEVICE FOR TWO WORK ROLLS OF A ROLLING STAND
DE19922373A1 (en) * 1999-05-14 2000-11-16 Sms Demag Ag Ingots used in hot rolling have a double acting hydraulic piston cylinder unit with both ends connected to guide pieces

Also Published As

Publication number Publication date
DE502004000074D1 (en) 2005-11-03
ES2246050T3 (en) 2006-02-01
DE10333883B3 (en) 2004-10-07
ATE305340T1 (en) 2005-10-15
EP1500442A1 (en) 2005-01-26

Similar Documents

Publication Publication Date Title
US8640516B2 (en) Rolling mill stand and related rolling mill for longitudinally rolling rod-shaped bodies
EP2307152B1 (en) Rolling device
EP0340504B1 (en) Device for bending and balancing axial movable rolls of a rolling stand
DE3821571A1 (en) DEVICE FOR THE AXIAL SHIFTING OF ROLLS IN THE FRAME OF A ROLLING MILL
EP1181114B1 (en) Bending device for the working rolls of a hot-rolling frame
DE2842529A1 (en) ROLLING MILL FRAMEWORK FOR COLD ROLLING PIPES
EP1500442B1 (en) Bending device for the rolls of a multi-roll stand
EP2451592B1 (en) 4-roll, 6-roll, 18-hs roll stand having a cassette-type design
DE19816602C1 (en) Roller frame for roll forming materials
DE102011107785B4 (en) Assembly of a rolling stand and method for rolling rod or tubular rolling stock
DE10141180A1 (en) Roll stand for rolling different rolling stock that requires different rolling forces
EP1212153B1 (en) Rolling stand
EP1687104A1 (en) Adjusting roll in rolling frames, among others vertical upset forging frames
DE10116988A1 (en) Rolling mill stand comprises devices for lifting and/or lowering intermediate roller rails and/or working roller rails during roller exchange comprising balancing crosspieces coupled to the roller rails
EP2389258A1 (en) Bending and balancing device for axially shiftable work rolls of a rolling mill
EP0791410B1 (en) Multi-roll rolling stand
WO2010003678A2 (en) Roller arrangement
DE19620704C1 (en) Sexto and quarto roll stands
DE20311456U1 (en) Bending control system for multiple roller rolling mill has compact hydraulic sleeves in a coaxial layout
DE4447382C2 (en) Roll stand for rolling sheets and strips
WO2002002254A1 (en) Roll stand, especially a duo or quarto roll stand, comprising bending and balancing devices for axially displaceable rollers
DE3807628C2 (en) Roll stand with shifting device
EP0794021B1 (en) Device for in situ precision grinding of the rolls of hot strip mills
DE2334442A1 (en) ADJUSTMENT DEVICE FOR ROLLING MILLS WITH CLOSED STANDS
DE2231719C3 (en) Roll stand for tube cold rolling mills

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040513

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

AKX Designation fees paid

Designated state(s): AT DE ES FR GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050928

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 502004000074

Country of ref document: DE

Date of ref document: 20051103

Kind code of ref document: P

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2246050

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20060629

BERE Be: lapsed

Owner name: ACHENBACH BUSCHHUTTEN G.M.B.H.

Effective date: 20060430

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140423

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140625

Year of fee payment: 11

Ref country code: IT

Payment date: 20140428

Year of fee payment: 11

Ref country code: ES

Payment date: 20140417

Year of fee payment: 11

Ref country code: AT

Payment date: 20140417

Year of fee payment: 11

Ref country code: FR

Payment date: 20140416

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502004000074

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 305340

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150424

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150424

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150424

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151103

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20151231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150424

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150430

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20160804

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150425