EP0492134B1 - Device for balancing and vertically bending working rolls of a four-high stand - Google Patents

Device for balancing and vertically bending working rolls of a four-high stand Download PDF

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Publication number
EP0492134B1
EP0492134B1 EP91119799A EP91119799A EP0492134B1 EP 0492134 B1 EP0492134 B1 EP 0492134B1 EP 91119799 A EP91119799 A EP 91119799A EP 91119799 A EP91119799 A EP 91119799A EP 0492134 B1 EP0492134 B1 EP 0492134B1
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EP
European Patent Office
Prior art keywords
piston rod
chock
shaft
chocks
roll
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP91119799A
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German (de)
French (fr)
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EP0492134A1 (en
Inventor
Axel Barten
Werner Moritz
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Achenbach Buschhetten GmbH and Co KG
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Achenbach Buschhetten GmbH and Co KG
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Publication of EP0492134A1 publication Critical patent/EP0492134A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/203—Balancing 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 balancing and vertical bending of the work rolls of a four-high rolling mill, each with two double-acting hydraulic actuating cylinders installed in the lower work roll chocks of a roll stand, symmetrically to the roll axis plane, with an actuating piston for vertical adjustment of a piston rod, which, in rolling operation, has a coupling device with the upper one Work roll chock is firmly connected.
  • the piston rod of the actuating cylinder is designed to be continuous. This leads to the fact that the piston rod both in the extended operating position, in which the piston rod is locked to the upper roller chock via a hammer head, and in the retracted rest position, in which the hammer head of the piston rod is unlocked from the upper roller chock, into the upper one Installation piece protrudes.
  • the work rolls can only be removed together from the roll stand, and only after the removal can the rolls be separated, for example, for replacement as part of repair and maintenance work.
  • the invention has for its object to improve the generic device for balancing and vertical bending of the work rolls of a four-high mill with regard to the running properties of the actuating cylinders by eliminating transverse forces and a faster separate expansion of the work rolls.
  • the subclaims relate to expedient developments of the balancing and bending device.
  • the balancing and bending device is characterized by the following advantages:
  • the actuating forces required for the vertical bending of the work rolls by the hydraulic actuating cylinders are carried out exclusively in the direction of the cylinder axis, so that the running properties of the actuating pistons in the cylinders are not impaired by surface pressures occurring between the piston and the cylinder wall due to transverse forces.
  • the four-high rolling mill 1 is equipped with a device for balancing and vertical bending of the two work rolls 6, 7, which works with two double-acting hydraulic actuating cylinders 13 installed in the lower work roll chock 4 of the two roll stands 2 symmetrically to the roll axis plane 12-12.
  • the actuating cylinder 13 take an actuating piston 14 to extend a piston rod 15 in the rest position 15 'from the lower work roll chock 4 and retract the free end 15a of the piston rod 15 into the upper work roll chock 5 during rolling operation and to retract the piston rod 15 from the operating position 15 ⁇ in the rest position 15 'in the lower chock 4 for separate removal of the work rolls 6, 7 when a roll change is required.
  • the free end 15a thereof is fixedly connected to the upper chock 5 by means of a coupling device 16.
  • the interior of the actuating cylinders 13 is divided by the actuating piston 14 into an upper 13a and a lower cylinder chamber 13b, and the upper cylinder chamber 13a is connected to an inlet and outlet 18 for pressure oil leading into the cylinder cover 17, and the lower cylinder chamber 13b is connected to an am Cylinder base 19 attached supply and discharge line 20 connected for pressure oil.
  • the actuating piston 14 is guided against rotation on a pin 21 provided with two flattened portions, which sits centrally in the cylinder base 19.
  • the piston rod 15 engages with a conical centering pin 15b arranged centrally at its free end 15a in a corresponding conical recess 22b in the lower end 22a of a shaft which is articulated in the upper chock 5 and is secured against axial displacement under tensile and compressive stress 22.
  • the inner shell 23a of the spherical bearing 23 is fastened by means of a nut 24 on the upper end 22c of the shaft 22 provided with a threaded pin 22d and the outer shell 23b of the bearing 23 is fastened in the upper work roll chock 5 with a spacer sleeve 25 and a screw-in piece 26.
  • a leaf spring 28 is installed as an elastic anti-rotation device for the shaft 22.
  • the groove 27 in the upper shaft end 22c is of slightly spherical design, so that the leaf spring 28 can be adjusted somewhat, thereby ensuring an exact engagement of the coupling device 16 (FIG. 3).
  • the bayonet-type coupling device 16 for connecting the piston rod 15 extended from the lower chock 4 into the operating position 15 ⁇ with the shaft 22 in the upper chock 5 has ring segments 29 with an external thread 30 arranged on the free end 15a of the piston rod 15 with a certain pitch.
  • the coupling device 16 consists of an axially fixed coupling sleeve 31, which is rotatably mounted on the lower end 22a of the elastically rotationally secured shaft 22 and is opposite the free end 15a of the piston rod 15, and projects on the inside with the same pitch as the ring segments 29 the piston rod 15 arranged ring segments 32 with an internal thread 33 corresponding to the external thread 30 of the ring segments 29 and a rotary drive for the coupling sleeve 31 for engaging and loosening the threads 30, 33 of the ring segments 29, 32 of the piston rod 15 and the shaft 22 (FIGS. 4 and 5).
  • the rotary drive of the coupling sleeve 31 is designed as a rack and pinion drive, one by one Hydraulic cylinder 34 has actuated rack 35 which is in engagement with a ring gear 36 which is fixedly seated on the coupling sleeve 31, which is arranged on the lower end 22a of the shaft 22 so as to be rotatable in the axial direction (FIG. 4).
  • the engaged clutch device 16 for the fixed connection of the piston rod 15 extended from the lower chock 4 into the operating position 15 ⁇ during rolling operation with the shaft 22 articulated in the upper chock 5 is locked by the hydraulic cylinder 34.
  • pressure oil is introduced via the supply line 18 into the upper cylinder chamber 13a and the lower cylinder chamber 13b is discharged via the discharge line 20
  • the actuating cylinders 13 in the lower work roll chocks 4 of the two roll stands 2 of the four-high mill stand 1 cause the two work roll chocks 4, 5 in the roll stands 2 moved towards each other so that the work rolls 6, 7 are subject to a concave deflection in the vertical direction with respect to the roll gap 37.

Description

Die Erfindung betrifft eine Vorrichtung zum Ausbalancieren und vertikalen Biegen der Arbeitswalzen eines Quartowalzgerüstes, mit je zwei in den unteren Arbeitswalzeneinbaustücken eines Walzenständers symmetrisch zur Walzenachsenebene eingebauten, doppeltwirkenden hydraulischen Stellzylindern mit einem Stellkolben zum vertikalen Verstellen einer Kolbenstange, die bei Walzbetrieb über eine Kupplungsvorrichtung mit dem oberen Arbeitswalzeneinbaustück fest verbindbar ist.The invention relates to a device for balancing and vertical bending of the work rolls of a four-high rolling mill, each with two double-acting hydraulic actuating cylinders installed in the lower work roll chocks of a roll stand, symmetrically to the roll axis plane, with an actuating piston for vertical adjustment of a piston rod, which, in rolling operation, has a coupling device with the upper one Work roll chock is firmly connected.

Bei einer derartigen aus JP-A-57-181704 bekannten Walzenbiegevorrichtung ist die Kolbenstange der Stellzylinder durchgehend ausgebildet. Dies führt dazu, daß die Kolbenstange sowohl in der ausgefahrenen Betriebesstellung, in der die Kolbenstange über einen Hammerkopf mit dem oberen Walzeneinbaustück verriegelt ist, als auch in der eingefahrenen Ruhestellung, in der der Hammerkopf der Kolbenstange von dem oberen Walzeneinbaustück entriegelt ist, in das obere Einbaustück hineinragt. Infolgedessen können die Arbeitswalzen nur zusammen aus dem Walzgerüst ausgebaut werden, und erst nach dem Ausbau können die Walzen beispielsweise zum Austausch im Rahmen von Reparatur- und Wartungsarbeiten getrennt werden.In such a roll bending device known from JP-A-57-181704, the piston rod of the actuating cylinder is designed to be continuous. This leads to the fact that the piston rod both in the extended operating position, in which the piston rod is locked to the upper roller chock via a hammer head, and in the retracted rest position, in which the hammer head of the piston rod is unlocked from the upper roller chock, into the upper one Installation piece protrudes. As a result, the work rolls can only be removed together from the roll stand, and only after the removal can the rolls be separated, for example, for replacement as part of repair and maintenance work.

Ein weiterer Nachteil der bekannten Walzenbiegevorrichtung besteht darin, daß Relativbewegungen zwischen dem oberen und unteren Arbeitswalzeneinbaustück durch die Kolbenstange, die durch den Stellkolben des Stellzylinders nur in axialer Richtung verschiebbar ist, nicht ausgeglichen werden können. Dies hat zur Folge, daß bei der Übertragung der Stellkräfte auf die Walzeneinbaustücke aufgrund der an den Kolbenstangen der Stellkolben angreifenden großen Biegekräfte in den Stellzylindern zwischen dem Außenmantel der Stellkolben und dem Innenmantel der Stellzylinder hohe Flächenpressungen auftreten, die die Laufeigenschaften der Stellkolben ungünstig beeinflussen und zu Betriebsstörungen führen können.Another disadvantage of the known roll bending device is that relative movements between the upper and lower work roll chock by the piston rod, which can only be displaced in the axial direction by the actuating piston of the actuating cylinder, cannot be compensated for. The result of this is that when the actuating forces are transmitted to the roller chocks due to the on the piston rods large bending forces acting on the actuating piston occur in the actuating cylinders between the outer jacket of the actuating piston and the inner jacket of the actuating cylinder, high surface pressures which adversely affect the running properties of the actuating piston and can lead to malfunctions.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Vorrichtung zum Ausbalancieren und vertikalen Biegen der Arbeitswalzen eines Quartowalzgerüstes im Hinblick auf die Laufeigenschaften der Stellzylinder durch die Eliminierung von Querkräften und einen schnelleren getrennten Ausbau der Arbeitswalzen zu verbessern.The invention has for its object to improve the generic device for balancing and vertical bending of the work rolls of a four-high mill with regard to the running properties of the actuating cylinders by eliminating transverse forces and a faster separate expansion of the work rolls.

Diese Aufgabe ist erfindungsgemäß gelöst durch die Ausbalancier- und Biegevorrichtung mit den Merkmalen des Patentanspruches 1.This object is achieved according to the invention by the balancing and bending device with the features of claim 1.

Die Unteransprüche betreffen zweckmäßige Weiterbildungen der Ausbalancier- und Biegevorrichtung.The subclaims relate to expedient developments of the balancing and bending device.

Die erfindungsgemäße Ausbalancier- und Biegevorrichtung zeichnet sich durch folgende Vorteile aus:
Die Ausübung der für die vertikale Biegung der Arbeitswalzen erforderlichen Stellkräfte durch die hydraulischen Stellzylinder erfolgt ausschließlich in Richtung der Zylinderachse, so daß die Laufeigenschaften der Stellkolben in den Zylindern nicht durch auftretende Flächenpressungen zwischen Kolben und Zylinderwand aufgrund von Querkräften beeinträchtigt werden. Die Möglichkeit, die Kolbenstangen der Stellzylinder vollkommen in eine Ruhestellung in die unteren Arbeitswalzenstücke einfahren zu können, sowie die lösbare Verbindung zwischen den Kolbenstangen der in den unteren Arbeitswalzeneinbaustücken eingebauten Stellzylinder und den oberen Arbeitswalzeneinbaustücken mittels einer bajonettverschlußartigen Kupplungsvorrichtung ermöglicht den schnellen getrennten Ausbau der Arbeitswalzen.The balancing and bending device according to the invention is characterized by the following advantages:
The actuating forces required for the vertical bending of the work rolls by the hydraulic actuating cylinders are carried out exclusively in the direction of the cylinder axis, so that the running properties of the actuating pistons in the cylinders are not impaired by surface pressures occurring between the piston and the cylinder wall due to transverse forces. The possibility of being able to completely retract the piston rods of the actuating cylinders into a rest position in the lower work roll pieces, as well as the detachable connection between the piston rods of the actuating cylinders built into the lower work roll chocks and the upper work roll chocks by means of a bayonet-type coupling device, enables the work rolls to be removed separately quickly.

Die erfindungsgemäße Banlancier- und Biegevorrichtung für die Arbeitswalzen eines Quartowalzwerkes ist nachstehebnd anhand schematischer Zeichnungen erläutert. Es zeigt

Fig. 1
eine Seitenansicht eines Walzenständers eines mit der Balancier- und Biegevorrichtung ausgerüsteten Quartowalzgerüstes mit einer Längsschnittdarstellung der Vorrichtung in Außerbetriebsstellung,
Fig. 2
eine vergrößerte Längsschnittdarstellung des unteren und oberen Arbeitswalzeneinbaustücks im Bereich eines Stellzylinders und jeweils in vergrößerter Darstellung
Fig. 3
einen Schnitt nach Linie III-III der Fig. 2,
Fig. 4
einen Schnitt nach Linie IV-IV der Fig. 2 und
Fig. 5
einen Schnitt nach Linie V-V der Fig. 4 durch die eingerückte Kupplungsvorrichtung.
The balancing and bending device according to the invention for the work rolls of a four-high rolling mill is explained below with the aid of schematic drawings. It shows
Fig. 1
2 shows a side view of a roll stand of a four-high rolling mill equipped with the balancing and bending device with a longitudinal sectional view of the device in the non-operating position,
Fig. 2
an enlarged longitudinal sectional view of the lower and upper work roll chock in the region of an actuating cylinder and each in an enlarged view
Fig. 3
3 shows a section along line III-III of FIG. 2,
Fig. 4
a section along line IV-IV of Fig. 2 and
Fig. 5
a section along line VV of Fig. 4 by the engaged clutch device.

Die beiden Walzenständer 2 des Quartowalzgerüstes 1 nach Fig. 1 weisen Fenster 3 zur Aufnahme eines unteren 4 und eines oberen Arbeitswalzeneinbaustücks 5 zur Lagerung der unteren 6 und der oberen Arbeitswalze 7 sowie zur Aufnahme eines unteren 8 und eines oberen Stützwalzeneinbaustücks 9 zur Lagerung der unteren 10 und der oberen Stützwalze 11 auf.1 have windows 3 for receiving a lower 4 and an upper work roll chock 5 for mounting the lower 6 and the upper work roll 7 and for receiving a lower 8 and an upper backup roll chock 9 for storing the lower 10 and the upper backup roller 11.

Das Quartowalzgerüst 1 ist mit einer Vorrichtung zum Ausbalancieren und vertikalen Biegen der beiden Arbeitswalzen 6, 7 ausgestattet, die mit je zwei in dem unteren Arbeitswalzeneinbaustück 4 der beiden Walzenständer 2 symmetrisch zur Walzenachsenebene 12-12 eingebauten, doppeltwirkenden, hydraulischen Stellzylindern 13 arbeitet. Die Stellzylinder 13 nehmen einen Stellkolben 14 auf zum Ausfahren einer in Ruhestellung 15′ befindlichen Kolbenstange 15 aus dem unteren Arbeitswalzeneinbaustück 4 und Einfahren des freien Endes 15a der Kolbenstange 15 in das obere Arbeitswalzeneinbaustück 5 bei Walzbetrieb und zum Einfahren der Kolbenstange 15 aus der Betriebsstellung 15˝ in die Ruhestellung 15′ in das untere Einbaustück 4 zum getrennten Ausbau der Arbeitswalzen 6, 7 bei einem erforderlichen Walzenwechsel. In der Betriebsstellung 15˝ der Kolbenstange 15 wird das freie Ende 15a derselben mittels einer Kupplungsvorrichtung 16 mit dem oberen Einbaustück 5 fest verbunden.The four-high rolling mill 1 is equipped with a device for balancing and vertical bending of the two work rolls 6, 7, which works with two double-acting hydraulic actuating cylinders 13 installed in the lower work roll chock 4 of the two roll stands 2 symmetrically to the roll axis plane 12-12. The actuating cylinder 13 take an actuating piston 14 to extend a piston rod 15 in the rest position 15 'from the lower work roll chock 4 and retract the free end 15a of the piston rod 15 into the upper work roll chock 5 during rolling operation and to retract the piston rod 15 from the operating position 15˝ in the rest position 15 'in the lower chock 4 for separate removal of the work rolls 6, 7 when a roll change is required. In the operating position 15˝ of the piston rod 15, the free end 15a thereof is fixedly connected to the upper chock 5 by means of a coupling device 16.

Der Innenraum der Stellzylinder 13 wird durch den Stellkolben 14 in eine obere 13a und eine untere Zylinderkammer 13b unterteilt, und die obere Zylinderkammer 13a ist an eine in den Zylinderdeckel 17 führende Zu- und Ableitung 18 für Drucköl und die untere Zylinderkammer 13b ist an eine am Zylinderboden 19 angebrachte Zu- und Ableitung 20 für Drucköl angeschlossen. Der Stellkolben 14 ist auf einem mit zwei Abflachungen versehenen Bolzen 21 verdrehsicher geführt, der zentrisch im Zylinderboden 19 sitzt.The interior of the actuating cylinders 13 is divided by the actuating piston 14 into an upper 13a and a lower cylinder chamber 13b, and the upper cylinder chamber 13a is connected to an inlet and outlet 18 for pressure oil leading into the cylinder cover 17, and the lower cylinder chamber 13b is connected to an am Cylinder base 19 attached supply and discharge line 20 connected for pressure oil. The actuating piston 14 is guided against rotation on a pin 21 provided with two flattened portions, which sits centrally in the cylinder base 19.

In der Betriebsstellung 15˝ greift die Kolbenstange 15 mit einem an ihrem freien Ende 15a mittig angeordneten, konischen Zentrierzapfen 15b in eine entsprechende konische Ausnehmung 22b im unteren Ende 22a einer im oberen Einbaustück 5 gelenkig gelagerten, gegen axiale Verschiebung bei Zug- und Druckbeanspruchung gesicherten Welle 22.In the operating position 15˝, the piston rod 15 engages with a conical centering pin 15b arranged centrally at its free end 15a in a corresponding conical recess 22b in the lower end 22a of a shaft which is articulated in the upper chock 5 and is secured against axial displacement under tensile and compressive stress 22.

Die Innenschale 23a des Gelenklagers 23 ist mittels einer Mutter 24 auf dem mit einem Gewindezapfen 22d versehenen oberen Ende 22c der Welle 22 und die Außenschale 23b des Lagers 23 ist mit einer Distanzhülse 25 und einem Einschraubstück 26 im oberen Arbeitswalzeneinbaustück 5 befestigt.The inner shell 23a of the spherical bearing 23 is fastened by means of a nut 24 on the upper end 22c of the shaft 22 provided with a threaded pin 22d and the outer shell 23b of the bearing 23 is fastened in the upper work roll chock 5 with a spacer sleeve 25 and a screw-in piece 26.

In eine Quernut 27 im Gewindezapfen 22d am oberen Wellenende 22c und entsprechende, gegenüberliegend angeordnete Nuten 25a, 25b in der zur Befestigung des Gelenklagers 23 dienenden Distanzhülse 25 ist eine Blattfeder 28 als elastische Verdrehsicherung für die Welle 22 eingebaut. Die Nut 27 im oberen Wellenende 22c ist leicht ballig ausgeführt, so daß sich die Blattfeder 28 etwas verstellen kann und dadurch ein exaktes Einkuppeln der Kupplungsvorrichtung 16 gewährleistet ist ( Fig. 3).In a transverse groove 27 in the threaded pin 22d at the upper shaft end 22c and corresponding, oppositely arranged grooves 25a, 25b in the spacer sleeve 25 used for fastening the spherical bearing 23, a leaf spring 28 is installed as an elastic anti-rotation device for the shaft 22. The groove 27 in the upper shaft end 22c is of slightly spherical design, so that the leaf spring 28 can be adjusted somewhat, thereby ensuring an exact engagement of the coupling device 16 (FIG. 3).

Die bajonettverschlußartige Kupplungsvorrichtung 16 zur Verbindung der aus dem unteren Einbaustück 4 in die Betriebsstellung 15˝ ausgefahrenen Kolbenstange 15 mit der Welle 22 im oberen Einbaustück 5 weist auf dem freien Ende 15a der Kolbenstange 15 mit einer bestimmten Teilung angeordnete Ringsegmente 29 mit einem Außengewinde 30 auf. Ferner besteht die Kupplungsvorrichtung 16 aus einer auf dem dem freien Ende 15a der Kolbenstange 15 gegenüberliegenden unteren Ende 22a der elastisch drehgesicherten Welle 22 drehbar angebrachten,axial festen,über das Wellenende 22a vorstehenden Kupplungshülse 31 mit auf der Innenseite mit der gleichen Teilung wie die Ringsegmente 29 der Kolbenstange 15 angeordneten Ringsegmenten 32 mit einem dem Außengewinde 30 der Ringsegmente 29 entsprechenden Innengewinde 33 sowie einem Drehantrieb für die Kupplungshülse 31 zum Ineingriffbringen und Lösen der Gewinde 30, 33 der Ringsegmente 29, 32 der Kolbenstange 15 und der Welle 22 (Fign. 4 und 5).The bayonet-type coupling device 16 for connecting the piston rod 15 extended from the lower chock 4 into the operating position 15˝ with the shaft 22 in the upper chock 5 has ring segments 29 with an external thread 30 arranged on the free end 15a of the piston rod 15 with a certain pitch. Furthermore, the coupling device 16 consists of an axially fixed coupling sleeve 31, which is rotatably mounted on the lower end 22a of the elastically rotationally secured shaft 22 and is opposite the free end 15a of the piston rod 15, and projects on the inside with the same pitch as the ring segments 29 the piston rod 15 arranged ring segments 32 with an internal thread 33 corresponding to the external thread 30 of the ring segments 29 and a rotary drive for the coupling sleeve 31 for engaging and loosening the threads 30, 33 of the ring segments 29, 32 of the piston rod 15 and the shaft 22 (FIGS. 4 and 5).

Der Drehantrieb der Kupplungshülse 31 ist als Zahnstangenantrieb ausgebildet, der eine durch einen Hydraulikzylinder 34 betätigte Zahnstange 35 aufweist, die mit einem Zahnkranz 36 in Eingriff steht, der fest auf der auf dem unteren Ende 22a der Welle 22 drehbar angeordneten in axialer Richtung unverschieblichen Kupplungshülse 31 sitzt (Fig. 4).The rotary drive of the coupling sleeve 31 is designed as a rack and pinion drive, one by one Hydraulic cylinder 34 has actuated rack 35 which is in engagement with a ring gear 36 which is fixedly seated on the coupling sleeve 31, which is arranged on the lower end 22a of the shaft 22 so as to be rotatable in the axial direction (FIG. 4).

Durch Drehen der Kupplungshülse 31 mittels des Zahnstangenantriebs 34-36 gelangen die Gewinde 30, 33 der Ringsegmente 29, 32 der Kolbenstange 15 und der Kupplungshülse 31 in Eingriff, so daß die im unteren Arbeitswalzeneinbaustück 4 angeordnete Kolbenstange 15 und die im oberen Arbeitswalzeneinbaustück 5 gelagerte Welle 22 aufgrund der Steigung der Gewinde 30, 33 gegeneinander verspannt werden und damit eine kraft- und formschlüssige Verbindung von Kolbenstange 15 und Welle 22 zur Übertragung von Zug- und Druckkräften gewährleistet ist.By turning the coupling sleeve 31 by means of the rack and pinion drive 34-36, the threads 30, 33 of the ring segments 29, 32 of the piston rod 15 and the coupling sleeve 31 engage, so that the piston rod 15 arranged in the lower work roll chock 4 and the shaft mounted in the upper work roll chock 5 22 are braced against each other due to the pitch of the threads 30, 33, thus ensuring a non-positive and positive connection between the piston rod 15 and shaft 22 for transmitting tensile and compressive forces.

Die eingerückte Kupplungsvorrichtung 16 zur festen Verbindung der bei Walzbetrieb aus dem unteren Einbaustück 4 in die Betriebsstellung 15˝ ausgefahrenen Kolbenstange 15 mit der in dem oberen Einbaustück 5 gelenkig gelagerten Welle 22 wird durch den Hydraulikzylinder 34 verriegelt. Bei Einleitung von Drucköl über die Zuleitung 18 in die obere Zylinderkammer 13a und Entlastung der unteren Zylinderkammer 13b über die Ableitung 20 werden durch die Stellzylinder 13 in den unteren Arbeitswalzeneinbaustücken 4 der beiden Walzenständer 2 des Quartowalzgerüstes 1 die beiden Arbeitswalzeneinbaustück 4, 5 in den Walzenständern 2 aufeinander zubewegt, so daß die Arbeitswalzen 6, 7 einer konkaven Durchbiegung in vertikaler Richtung mit Bezug auf den Walzspalt 37 unterliegen. Bei Einleitung von Drucköl über die Zuleitung 20 in die untere Zylinderkammer 13b und Entlastung der oberen Zylinderkammer 13a über die Ableitung 18 werden die beiden Arbeitswalzeneinbaustücke 4, 5 in den Walzenständern 2 durch die Stellzylinder 13 voneinander wegbewegt, so daß eine konvexe Durchbiegung der Arbeitswalzen 6, 7 in vertikaler Richtung mit Bezug auf den Walzspalt 37 erreicht wird. Durch die gelenkige Lagerung der Wellen 22 zur Übertragung der durch die Stellzylinder 13 auf das obere Einbaustück 5 ausgeübten Zug- und Druckkräfte werden die Relativbewegungen zwischen unterem 4 und oberem Einbaustück 5 bei der vertikalen Biegung der Arbeitswalzen 6, 7 ausgeglichen, derart, daß die Stellkolben 14 der Stellzylinder 13 im unteren Einbaustück 4 und die zugehörigen Wellen 22 im oberen Einbaustück 5 bei der Walzenbiegung immer koaxial ausgerichtet sind und der Stellkolben 14 in den Stellzylindern 13 keinen Querkräften unterliegt, nicht verkantet und dadurch störungsfrei läuft.The engaged clutch device 16 for the fixed connection of the piston rod 15 extended from the lower chock 4 into the operating position 15˝ during rolling operation with the shaft 22 articulated in the upper chock 5 is locked by the hydraulic cylinder 34. When pressure oil is introduced via the supply line 18 into the upper cylinder chamber 13a and the lower cylinder chamber 13b is discharged via the discharge line 20, the actuating cylinders 13 in the lower work roll chocks 4 of the two roll stands 2 of the four-high mill stand 1 cause the two work roll chocks 4, 5 in the roll stands 2 moved towards each other so that the work rolls 6, 7 are subject to a concave deflection in the vertical direction with respect to the roll gap 37. When pressure oil is introduced via the feed line 20 into the lower cylinder chamber 13b and the upper cylinder chamber 13a is discharged via the discharge line 18, the two work roll chocks 4, 5 in the roll stands 2 are moved away from one another by the actuating cylinders 13, so that a convex deflection of the Work rolls 6, 7 in the vertical direction with respect to the roll gap 37 is reached. Due to the articulated mounting of the shafts 22 for the transmission of the tensile and compressive forces exerted by the actuating cylinder 13 on the upper chock 5, the relative movements between the lower 4 and the upper chock 5 are compensated for in the vertical bending of the work rolls 6, 7, such that the adjusting pistons 14 of the actuating cylinder 13 in the lower chock 4 and the associated shafts 22 in the upper chock 5 are always coaxially aligned during the roll bending and the actuating piston 14 in the actuating cylinders 13 is not subject to any transverse forces, does not tilt and therefore runs smoothly.

Claims (5)

  1. Device for balancing and vertically deflecting the work rolls (6, 7) of a four-high roll stand (1), each with two double-acting hydraulic servo cylinders (13) installed in the lower work roll chocks (4) of a roll housing (2) symmetrically to the plane of the roll axes (12-12), with a servo piston (14) for vertically displacing a piston rod (15) which during rolling can be rigidly connected by a coupling device (16) to the upper work roll chock (5), characterised by short piston rods (15) which can be retracted into an inoperative position (15′) completely in the lower chocks (5) for separate dismounting of the work rolls (6, 7), as well as shafts (22) which are arranged in the upper chocks (5) and which are pivotably mounted in the chocks (5) by their upper end (22c) and prevented from being displaced axially under tensile and compressive stress and from being rotated relative thereto and which can be rigidly connected by means of the coupling device (16) to the piston rods (15˝) extended from the lower chocks (4).
  2. Device according to claim 1, characterised by a bayonet fastening-like coupling device (16) for connection of the non-rotatable piston rod (15) of the servo cylinder (13) installed in the lower chock (4), which piston rod (15) is extended into the operative position (15˝), to the pivotably mounted shaft (22) which is prevented from being displaced axially under tensile and compressive stress and from being rotated, wherein the coupling device (16) comprises, on the free end (15a) of the piston rod (15), ring segments (29) with an external thread (30) arranged with a given spacing, a coupling sleeve (31) which is rotatably mounted on the lower end (22a) of the shaft (22) and axially fixed and protrudes beyond the shaft end (22a), with ring segments (32) arranged on the inside with the same spacing as the ring segments (29) of the piston rod (15), with an internal thread (33) corresponding to the external thread (30) of the ring segments (29), and also a rotary drive in the upper work roll chock (5) for the coupling sleeve (31) for engagement and release of the threads (30, 33) of the ring segments (29, 32) of the piston rod (15) and shaft (22).
  3. Device according to claims 1 and 2, characterised by a rack drive for engagement and release of the coupling device (16) and locking thereof during rolling, wherein the rack drive comprises a rack (35) which is operated by a hydraulic cylinder (34) and which meshes with a ring gear (36) rigidly mounted on the coupling sleeve (31) which is rotatably arranged on the lower end (22a) of the shaft (22) in the upper chock (5) and non-displaceable in the axial direction.
  4. Device according to any of claims 1 to 3, characterised by a conical centring pin (15b) which is arranged centrally at the free end (15a) of the piston rod (15) of the servo cylinders (13) installed in the lower chock (4) and which in the operative position (15˝) of the piston rod (15) engages in a corresponding conical recess (22b) in the lower end (22a) of the shaft (22) mounted in the upper chock (5).
  5. Device according to any of claims 1 to 4, characterised by an elastic means for preventing rotation of the shaft (22) in the upper work roll chock (5).
EP91119799A 1990-12-21 1991-11-21 Device for balancing and vertically bending working rolls of a four-high stand Expired - Lifetime EP0492134B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041290 1990-12-21
DE4041290A DE4041290A1 (en) 1990-12-21 1990-12-21 DEVICE FOR BALANCING AND VERTICAL BENDING THE WORK ROLLERS OF A QUARTO ROLLING DEVICE

Publications (2)

Publication Number Publication Date
EP0492134A1 EP0492134A1 (en) 1992-07-01
EP0492134B1 true EP0492134B1 (en) 1994-08-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119799A Expired - Lifetime EP0492134B1 (en) 1990-12-21 1991-11-21 Device for balancing and vertically bending working rolls of a four-high stand

Country Status (4)

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US (1) US5253503A (en)
EP (1) EP0492134B1 (en)
JP (1) JPH0755327B2 (en)
DE (2) DE4041290A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2725389B1 (en) * 1994-10-06 1996-12-27 Clecim Sa LAMINATION INSTALLATION
US6401506B1 (en) 1998-02-27 2002-06-11 Nippon Steel Corporation Sheet rolling method and sheet rolling mill
US6250120B1 (en) 2000-06-27 2001-06-26 Morgan Construction Company Apparatus for rotatably supporting the neck of a roll in a rolling mill
CN112692071B (en) * 2020-12-11 2023-10-24 陕西龙门钢铁有限责任公司 Lifting device for replacing working rolls of strip steel four-high mill

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE73497C (en) * F. H. DESENISS & A. JACOB! in Hamburg, Wendenstr. 133 Cartridge case
DE955132C (en) * 1954-02-03 1956-12-27 Moeller & Neumann Gmbh Device for pressing the work rolls on roll stands
DE1289811B (en) * 1963-07-29 1969-02-27 Achenbach Soehne Gmbh Device for balancing and bending the work rolls of a four-high framework
DE1527642A1 (en) * 1966-01-26 1970-04-09 Hoestemberghe & Kluetsch Gmbh Hydraulic adjusting device to keep the roll gap constant in roll stands, especially in block and slab rolling mills
DE1752581C3 (en) * 1968-06-18 1974-05-09 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh, 4100 Duisburg Four-high mill stand
DE1936769A1 (en) * 1969-07-19 1971-02-04 Demag Ag Controlling the camber of working rollers - of double high metal rolling mill
DE2804007A1 (en) * 1978-01-31 1979-08-02 Schloemann Siemag Ag Balancing device for polling mill - with swivelling support pin to prevent premature leakage
DE3261730D1 (en) * 1981-02-28 1985-02-14 Schloemann Siemag Ag Roll stand
JPS57181704A (en) * 1981-04-28 1982-11-09 Kawasaki Steel Corp Roll bending device
JPS57181705A (en) * 1981-05-01 1982-11-09 Kawasaki Steel Corp Roll bending device
DE3638330A1 (en) * 1986-11-10 1988-05-19 Schloemann Siemag Ag ROLLING DEVICES WITH A DEVICE FOR THE AXIAL SHIFTING OF ADJUSTABLE ROLLERS
DE3728795A1 (en) * 1987-08-26 1989-03-09 Mannesmann Ag Rolling stand with work rolls

Also Published As

Publication number Publication date
JPH0523716A (en) 1993-02-02
JPH0755327B2 (en) 1995-06-14
DE59102500D1 (en) 1994-09-15
DE4041290C2 (en) 1993-05-06
DE4041290A1 (en) 1992-07-02
US5253503A (en) 1993-10-19
EP0492134A1 (en) 1992-07-01

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