EP0483599B1 - Rolling stand comprising means for supporting the upper working roll in a spaced manner - Google Patents

Rolling stand comprising means for supporting the upper working roll in a spaced manner Download PDF

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Publication number
EP0483599B1
EP0483599B1 EP91117631A EP91117631A EP0483599B1 EP 0483599 B1 EP0483599 B1 EP 0483599B1 EP 91117631 A EP91117631 A EP 91117631A EP 91117631 A EP91117631 A EP 91117631A EP 0483599 B1 EP0483599 B1 EP 0483599B1
Authority
EP
European Patent Office
Prior art keywords
chocks
levers
roll
support levers
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91117631A
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German (de)
French (fr)
Other versions
EP0483599A2 (en
EP0483599A3 (en
Inventor
Martin Braun
Jürgen Armenat
Heinrich Röse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Publication date
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Publication of EP0483599A2 publication Critical patent/EP0483599A2/en
Publication of EP0483599A3 publication Critical patent/EP0483599A3/en
Application granted granted Critical
Publication of EP0483599B1 publication Critical patent/EP0483599B1/en
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Classifications

    • 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
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • 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
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/106—Vertical displacement of rolls or roll chocks during horizontal roll changing
    • 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
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially

Definitions

  • the invention relates to a roll stand with work rolls mounted in chocks, the upper of which can be lifted off from the lower by means of balancing cylinders and mechanical means assigned to a roll change by the chocks to prevent damage to their bales from being touched above the lower work roll, the mechanical means being pivotable Include support levers that are supported in their operative position with their free ends on the opposite chocks.
  • US-A-3 877 276 discloses support levers pivotally connected to one of the chocks of one of the rolls of a pair of rolls, the legs of which can be displaced in a groove of the opposite chocks during operation of the rolls and for changing rolls with one of the groove excavated support on the edge of the groove. Since the support levers are never completely lifted out of their groove, mutual axial displacements of the rollers are prevented in the case of roller sets prepared for removal. However, this has the disadvantage that such axial displacements are not possible even during rolling; Scaffolds common today, however, often have additional setting options in which work rolls must also be axially shifted against each other during rolling operation, e.g.
  • the recesses or grooves would have to be extremely long or wide in order to allow relative axial displacements relative to one another during the rolling operation, and accordingly the rollers have to be shifted further against one another in order to change the rollers.
  • the invention is based on the object of providing a simple device by means of which the upper work roll can be supported in a secured middle position with axial displacement so far above the lower one when the roll is changed in generic roll stands that contact with the bale and thus damage to its lateral surfaces are excluded are.
  • the device should also be so light and easy to use that additional times for parking the upper work roll on the lower one are not, or only to a small extent, taken up.
  • FIG. 1 shows a vertical section through a stator 1 shown broken off, which shows a fixed block 2 held by screws in the stator window, in which blocks 3 and 4 which are displaceable parallel to the axes of the rollers are held, each with hydraulic bending cylinders 5 are equipped to bend the work rolls.
  • the piston rods of these bending cylinders 5 engage ears 6, 7 of the chocks 8, 9 of the work rolls 10, 11.
  • the chocks 8 of the upper work roll 10 encompass side flanks 13 of the chocks 9 of the lower work roll with shoulders 12.
  • the lugs 12 are each equipped with a slot 14, in which, supported by a pivot pin 15, support levers 16 are pivotally arranged.
  • the support levers 16 are in turn equipped at the rear with a groove in which a spring 17 is held, which in the exemplary embodiment is single ended with the support lever 16 connected leaf spring it formed, the free end of which is supported against a wear plate 18 of the chock 8.
  • the upper end of the chock 9 of the lower work roll 11 is provided with a groove 19 for receiving the support lever 16.
  • the ears 7 of the chock 9 of the lower work roll 11 not only engage under the piston rods of the bending cylinders 5, they are also equipped with a pin supporting a roller 20, which allows the work rolls to be extended by means of a liftable extension rail 21.
  • FIG. 2 shows a side view of a chock 8 of the upper work roll 10 which has been broken open in some areas.
  • the pivot pin 15 is mounted with slight play.
  • the support lever 16 Connected to it is the support lever 16 which can be pivoted within the slot 14 of the projection 12.
  • a shaft 23 engages in a form-fitting manner in one of the ends of the pivot pin 15 and is held by a plate which overlaps a collar and is provided with an actuating lever 24 at the free end which bears against a bolt 26 which is arranged on the displaceable block 3 and can be actuated by a bolt cylinder 25.
  • FIG. 3 shows the shaft 27 of the locking cylinder 25, on which a ring shoulder 29 of the bolt 26 is fixed by means of a nut 28.
  • one end 30 of the locking bar 26 engages behind a strip 31 of the chock 8 and thus connects the displaceable block 3 with the chock 8, so that when the upper work roll 10 is axially displaced, the chock 8 of the displaceable block 3 takes along.
  • the upper chocks 8 are first raised into the position shown by means of the bending cylinders 5, which also serve for balancing, via their ears 6. Since the shifting devices of the work rolls, not shown, have previously shifted them into their axial middle or zero position, the springs 17 press the support levers 16, which can be pivoted about pivot bolts 15, into the groove 19 of the chocks 9 of the lower work rolls 11.
  • the engagement-side flanks of the groove 19 are chamfered and wedge-like widened and / or the edge strips of the flanks of the support lever 16 lying at the front in the pivoting direction are tapered in a wedge shape.
  • the actuation lever 24 In order to allow the support levers 16 to engage in the groove 19, their prestressing by the springs 17 is not sufficient, however. It is also necessary for the actuation lever 24 to be released. In the exemplary embodiment, this is achieved by actuating the locking cylinder 25. During the rolling, the piston of the locking cylinder 25 is retracted and the ends 30 of the locking bars 26 overlap the strips 31 of the mounting pieces 8 connected to the sliding blocks 3. If the work rolls 10 and 11 are moved into their symmetrical middle or zero position, the locking cylinder 25 can be actuated.
  • the lugs 32 of the latch 26 penetrate into the recesses fixed to the stand and thus lock the displaceable blocks 3 in their zero position with the stand, so that their position does not change during the following process of extending and an unlocking can take place after retracting the exchange rate of the work rolls .
  • the actuating levers 24 of the support levers 16 are also released, so that they can now enter the groove 19 under the action of their bias by the spring 17.
  • the upper work roll 10 with chocks 8 is slightly raised by means of the upper bending cylinder 5, and by retracting the locking cylinder, on the one hand, the interlocks between the displaceable blocks 3 and the stand are released, the displaceable blocks 3 simultaneously with the chocks 8 get connected.
  • the support levers 16 are then simultaneously lifted out of the grooves 19 and pivoted back against the force of the springs 17 into their extreme position shown in FIG. 1, so that now after the application of the bending cylinder 5 corresponding to the rolling, the tapping can be done.
  • the invention is not limited to the illustrated embodiment; in particular, the actuation of the support lever 16 can be designed differently.
  • actuating devices provided for it can be arranged, and in the case of double-acting drive devices it is also possible to dispense with pretensioning by means of a spring.
  • the upper work roll is supported for the roll change on the lower one while maintaining a distance with little effort, without requiring a special axial displacement of the work rolls against one another, and at the same time the work rolls are not only held at a predetermined distance, they are also securely fixed one above the other in a symmetrical position.

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  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Metal Rolling (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Automatic Assembly (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)

Abstract

The invention relates to an apparatus by means of which, to change the rolls, the chocks of the upper working roll can be supported on those of the lower working roll in such a way that the rolls rest freely one above the other and their shells do not touch. According to the invention, the chocks of one of the rolls are equipped with swivellable supporting levers which, in their normal position, engage around flanks of the opposite chocks and, during adjustments of the stand, are capable of sliding on the said flanks. To change the rolls, however, the upper working roll is raised together with its chocks in such a way that the spring-loaded supporting levers can swivel inwards and engage in grooves in the opposite chock and, during the lowering of the upper working roll, are supported against the base of these grooves. During the installation of a set of rolls, the upper working roll is likewise lifted and the supporting levers are then spread apart, for example by means of a drive or locking devices, so that, as the upper working roll is lowered, they slide past the groove supporting them and can come to rest against the flanks of the opposite chock. <IMAGE>

Description

Die Erfindung betrifft ein Walzgerüst mit in Einbaustücken gelagerten Arbeitswalzen, deren obere vermittels von Ausbalancierungszylindern von der unteren abhebbar und für einen Walzenwechsel durch den Einbaustücken zugeordnete mechanische Mittel zur Vermeidung der Beschädigung ihrer Ballen durch Berührungen oberhalb der unteren Arbeitswalze gehalten ist, wobei die mechanischen Mittel schwenkbare Stützhebel umfassen, die in ihre Wirkstellung sich mit ihren freien Enden auf den gegenüberliegenden Einbaustücken abstützen.The invention relates to a roll stand with work rolls mounted in chocks, the upper of which can be lifted off from the lower by means of balancing cylinders and mechanical means assigned to a roll change by the chocks to prevent damage to their bales from being touched above the lower work roll, the mechanical means being pivotable Include support levers that are supported in their operative position with their free ends on the opposite chocks.

Es ist bekannt, bei Arbeitswalzensätzen die Einbaustücke der oberen und der unteren Arbeitswalzen mit Vorsprüngen und Ausnehmungen, bspw. Zapfen und Löchern, derart auszustatten, daß im normalen Betriebe die Vorsprünge mehr oder weniger in die Ausnehmungen eingreifen; zum Ausbau werden die oberen Arbeitswalzen samt ihren Einbaustücken angehoben und dann axial so verschoben, daß die Vorsprünge aus dem Bereiche der Ausnehmungen austreten und auf höher gelegene Bereiche der Einbaustücke derart absetzbar sind, daß die Ballen der beiden Arbeitswalzen eines Satzes einander nicht mehr berühren und damit auch ihre Oberflächenbeschaffenheit durch Aufliegen nicht beeinträchtigt wird. Es hat sich jedoch gezeigt, daß die von einem Walzenwechsel in Anspruch genommene Zeit, die als Stillstandszeit des Gerüstes sich nachteilig bemerkbar macht, durch die Notwendigkeit der axialen Verschiebung nach dem Anheben unliebsam verlängert wird. Als nachteilig macht sich auch bemerkbar, daß der auszutauschende Walzensatz durch solche zusätzlichen axialen Verschiebungen länger wird, so daß seine Handhabung erschwert wird.It is known in the case of work roll sets to provide the chocks of the upper and lower work rolls with projections and recesses, for example pins and holes, in such a way that, in normal operation, the projections engage more or less in the recesses; to remove the upper work rolls with their chocks and then axially moved so that the projections emerge from the area of the recesses and can be moved to higher areas of the chocks so that the bales of the two work rolls of a set no longer touch each other and thus their surface quality is not affected by lying on them. However, it has been shown that the time taken up by a roller change, which is disadvantageously noticeable as the standstill time of the stand, is unpleasantly increased by the necessity of the axial displacement after the lifting. Another disadvantage is that the roller set to be replaced becomes longer due to such additional axial displacements, so that its handling is made more difficult.

Die US-A-3 877 276 (nächstkommender Stand der Technik) offenbart mit einem der Einbaustücke einer der Walzen eines Walzenpaares schwenkbar verbundene Stützhebel, deren Schenkel während des Betriebes der Walzen je in einer Nut der gegenüberliegenden Einbaustücke verschiebbar sind und zum Walzenwechsel mit einem aus der Nut ausgehobenen Ansatz sich auf den Rand der Nut abstützen. Da die Stützhebel nie völlig aus ihrer Nut ausgehoben werden, werden zwar bei für den Ausbau vorbereiteten Walzensätze gegenseitige axiale Verschiebungen der Walzen unterbunden. Dies macht sich jedoch nachteilig bemerkbar, das auch während des Walzens solche axiale Verschiebungen nicht möglich sind; heute übliche Gerüste aber weisen vielfach weitere Stellmöglichkeiten auf, bei denen Arbeitswalzen während des Walzbetriebes zusätzlich axial gegeneinander zu verschieben sind, bspw. um Ballenenden von Arbeitswalzen über Walzgutkanten stellen zu können oder mit Hilfe eines Spezialschliffes die effektive Balligkeit verändern zu können (CVC). Bei derartigen Walzen müßten die Ausnehmungen bzw. Nute extrem lang bzw. breit ausgeführt sein, um während des Walzbetriebes relative axiale Verschiebungen gegeneinander zuzulassen, und zum Walzenwechsel sind die Walzen dementsprechend noch weiter gegeneinander zu verschieben.US-A-3 877 276 (closest prior art) discloses support levers pivotally connected to one of the chocks of one of the rolls of a pair of rolls, the legs of which can be displaced in a groove of the opposite chocks during operation of the rolls and for changing rolls with one of the groove excavated support on the edge of the groove. Since the support levers are never completely lifted out of their groove, mutual axial displacements of the rollers are prevented in the case of roller sets prepared for removal. However, this has the disadvantage that such axial displacements are not possible even during rolling; Scaffolds common today, however, often have additional setting options in which work rolls must also be axially shifted against each other during rolling operation, e.g. to be able to place bale ends of work rolls over the edges of the rolling stock or to be able to change the effective crowning with a special grinding (CVC). With such rollers, the recesses or grooves would have to be extremely long or wide in order to allow relative axial displacements relative to one another during the rolling operation, and accordingly the rollers have to be shifted further against one another in order to change the rollers.

Die Erfindung geht von der Aufgabe aus, eine einfache Vorrichtung zu schaffen, mittels derer beim Walzenwechsel in gattungsgemäß augebildeten Walzgerüsten die obere Arbeitswalze in einer gesicherten Mittelstellung einer axialen Verschiebbarkeit so weit über der unteren abstützbar ist, daß Berührungen der Ballen und damit Beschädigungen ihrer Mantelflächen ausgeschlossen sind. Die Vorrichtung soll auch derart leicht und einfach zu handhaben sein, daß zusätzliche Zeiten zum Abstellen der oberen Arbeitswalze auf der unteren nicht oder nur in geringem Ausmaße in Anspruch genommen werden.The invention is based on the object of providing a simple device by means of which the upper work roll can be supported in a secured middle position with axial displacement so far above the lower one when the roll is changed in generic roll stands that contact with the bale and thus damage to its lateral surfaces are excluded are. The device should also be so light and easy to use that additional times for parking the upper work roll on the lower one are not, or only to a small extent, taken up.

Gelöst wird diese Aufgabe durch die Merkmale des Patentanspruches 1. Die Anordnung der schwenkbaren Stützhebel erlaubt es, die während des Walzens nicht in Erscheinung tretenden Stützhebel nach entsprechendem Anheben der Walzen derart in Nute des gegenüberliegenden Einbaustückes einzuschwenken, so daß die Last der oberen Arbeitswalze und ihrer Einbaustücke sicher und stabil übernommen wird.This object is achieved by the features of claim 1. The arrangement of the pivotable support levers allows the support levers which do not appear during rolling to be pivoted into the groove of the opposite chock after correspondingly lifting the rollers, so that the load of the upper work roll and its Chocks safely and stably.

Vorteilhafte und zweckmäßige Weiterbildungen sind in den Unteransprüchen gekennzeichnet.Advantageous and expedient further developments are characterized in the subclaims.

Im einzelnen sind die Merkmale der Erfindung anhand der folgenden Beschreibung eines Ausführungsbeispieles in Verbindung mit dieses darstellenden Zeichnungen erläutert. Es zeigen hierbei:

Figur 1
einen abgebrochenen Halbschnitt durch einen Ständer und Einbaustücke eines Walzgerüstes,
Figur 2
eine Ansicht auf ein teilweise parallel zu seiner Achse vertikal geschnittenes Einbaustück, und
Figur 3
einen durch ein Einbaustück und dessen Riegelvorrichtung geführten Horizontalschnitt.
The features of the invention are explained in detail on the basis of the following description of an exemplary embodiment in conjunction with the drawings which illustrate the same. They show:
Figure 1
a broken half-section through a stand and chocks of a roll stand,
Figure 2
a view of a chock partially vertically cut parallel to its axis, and
Figure 3
a horizontal section made through a chock and its locking device.

In der Fig. 1 ist ein achsnormal durch einen abgebrochen dargestellten Ständer 1 geführter Vertikalschnitt gezeigt, der einen durch Schrauben im Ständerfenster gehaltenen Festblock 2 zeigt, in dem parallel zu den Achsen der Walzen verschiebbare Blöcke 3 und 4 gehalten sind, die jeweils mit hydraulischen Biegezylindern 5 zur Biegung der Arbeitswalzen ausgestattet sind. Die Kolbenstangen dieser Biegezylinder 5 hintergreifen Ohren 6, 7 der Einbaustücke 8, 9 der Arbeitswalzen 10, 11.1 shows a vertical section through a stator 1 shown broken off, which shows a fixed block 2 held by screws in the stator window, in which blocks 3 and 4 which are displaceable parallel to the axes of the rollers are held, each with hydraulic bending cylinders 5 are equipped to bend the work rolls. The piston rods of these bending cylinders 5 engage ears 6, 7 of the chocks 8, 9 of the work rolls 10, 11.

Die Einbaustücke 8 der oberen Arbeitswalze 10 umgreifen mit Ansätzen 12 seitlich Flanken 13 der Einbaustücke 9 der unteren Arbeitswalze. Die Ansätze 12 sind jeweils mit einem Schlitz 14 ausgestattet, in dem, von einem Schwenkbolzen 15 gehalten, Stützhebel 16 verschwenkbar angeordnet sind. Die Stützhebel 16 sind ihrerseits rückwärtig mit einer Nut ausgestattet, in der eine Feder 17 gehalten ist, die im Ausführungsbeispiel als einendig mit dem Stützhebel 16 verbundene Blattfeder ausgebildet it, deren freies Ende sich gegen eine Schleißplatte 18 des Einbaustückes 8 abstützt. Das obere Ende des Einbaustückes 9 der unteren Arbeitswalze 11 ist mit einer Nut 19 zur Aufnahme des Stützhebels 16 versehen.The chocks 8 of the upper work roll 10 encompass side flanks 13 of the chocks 9 of the lower work roll with shoulders 12. The lugs 12 are each equipped with a slot 14, in which, supported by a pivot pin 15, support levers 16 are pivotally arranged. The support levers 16 are in turn equipped at the rear with a groove in which a spring 17 is held, which in the exemplary embodiment is single ended with the support lever 16 connected leaf spring it formed, the free end of which is supported against a wear plate 18 of the chock 8. The upper end of the chock 9 of the lower work roll 11 is provided with a groove 19 for receiving the support lever 16.

Die Ohren 7 des Einbaustückes 9 der unteren Arbeitswalze 11 untergreifen nicht nur die Kolbenstangen der Biegezylinder 5, sie sind auch mit einem eine Laufrolle 20 stützenden Bolzen ausgestattet, die das Ausfahren der Arbeitswalzen mittels einer anhebbaren Ausfahrschiene 21 gestattet.The ears 7 of the chock 9 of the lower work roll 11 not only engage under the piston rods of the bending cylinders 5, they are also equipped with a pin supporting a roller 20, which allows the work rolls to be extended by means of a liftable extension rail 21.

In Figur 2 ist eine bereichsweise aufgebrochene Seitenansicht eines Einbaustückes 8 der oberen Arbeitswalze 10 gezeigt. In geschnitten dargestellten Buchsen 22 ist der Schwenkbolzen 15 mit geringfügigem Spiel gelagert. Mit ihm verbunden ist der innerhalb des Schlitzes 14 des Ansatzes 12 verschwenkbare Stützhebel 16. Formschlüssig in eines der Enden des Schwenkbolzens 15 greift eine Welle 23 ein, die durch eine einen Bund derselben übergreifende Platte gehalten wird und am freien Ende mit einem Betätigungshebel 24 versehen ist, der sich an einen durch einen am verschiebbaren Block 3 angeordneten, durch einen Riegelzylinder 25 betätigbaren Riegel 26 anlegt. Der abgebrochen dargestellte Vertikalschnitt der Fig. 3 zeigt den Schaft 27 des Riegelzylinders 25, auf dem mittels einer Mutter 28 ein Ringansatz 29 des Riegels 26 fixiert ist. Im dargestellten Zustande des eingefahrenen Kolbens des Riegelzylinders 25 hintergreift ein Ende 30 des Riegels 26 eine Leiste 31 des Einbaustückes 8 und verbindet damit den verschiebbaren Block 3 mit dem Einbaustück 8, so daß beim axialen Verschieben der oberen Arbeitswalze 10 deren Einbaustück 8 den verschiebbaren Block 3 mitnimmt.FIG. 2 shows a side view of a chock 8 of the upper work roll 10 which has been broken open in some areas. In sleeves 22 shown in section, the pivot pin 15 is mounted with slight play. Connected to it is the support lever 16 which can be pivoted within the slot 14 of the projection 12. A shaft 23 engages in a form-fitting manner in one of the ends of the pivot pin 15 and is held by a plate which overlaps a collar and is provided with an actuating lever 24 at the free end which bears against a bolt 26 which is arranged on the displaceable block 3 and can be actuated by a bolt cylinder 25. The broken vertical section of FIG. 3 shows the shaft 27 of the locking cylinder 25, on which a ring shoulder 29 of the bolt 26 is fixed by means of a nut 28. In the illustrated state of the retracted piston of the locking cylinder 25, one end 30 of the locking bar 26 engages behind a strip 31 of the chock 8 and thus connects the displaceable block 3 with the chock 8, so that when the upper work roll 10 is axially displaced, the chock 8 of the displaceable block 3 takes along.

Zur Durchführung eines Walzenwechsels wird zunächst mittels der Biegezylinder 5, die auch der Ausbalancierung dienen, über deren Ohren 6 die oberen Einbaustücke 8 in die dargestellte Lage angehoben. Da bereits vorher die nicht dargestellten Verschiebevorrichtungen der Arbeitswalzen diese in ihre axiale Mittel- bzw. Null-Stellung verschoben haben, drücken die Federn 17 die um Schwenkbolzen 15 verschwenkbaren Stützhebel 16 in die Nute 19 der Einbaustücke 9 der unteren Arbeitswalzen 11 hinein. Hierbei legt sich als Anschlag ein Bereich des Schaftes des Stützhebels 16 gegen die als Anschlag wirkende Flanke 33 der Leiste 31 des Einbaustückes 8, und beim Nachlassen der Beaufschlagung der Biegezylinder 5 legt sich der Grund des Schlitzes 14 auf eine Fläche 34 des Kopfes des Stützhebels 16, so daß unter Berücksichtigung des Spiels des Schwenkbolzens 15 in den ihn führenden Buchsen 22 die Übertragung der Last der oberen Arbeitswalze 10 mit Einbaustücken 8 über diese Kopffläche erfolgt und die Schwenkbolzen 15 keinen Scherungskräften unterworfen ist.To carry out a roll change, the upper chocks 8 are first raised into the position shown by means of the bending cylinders 5, which also serve for balancing, via their ears 6. Since the shifting devices of the work rolls, not shown, have previously shifted them into their axial middle or zero position, the springs 17 press the support levers 16, which can be pivoted about pivot bolts 15, into the groove 19 of the chocks 9 of the lower work rolls 11. Here, as a stop, an area of the shaft of the support lever 16 lies against the flank 33 of the bar 31 of the mounting piece 8 acting as a stop, and when the loading on the bending cylinder 5 decreases, the bottom of the slot 14 lies on a surface 34 of the head of the support lever 16 , so that taking into account the play of the pivot pin 15 in the bushings 22 leading it, the transmission of the load of the upper work roll 10 with chocks 8 takes place over this head surface and the pivot pin 15 is not subjected to any shear forces.

Um den Eingriff des Stützhebels 16 in die Nute 19 zu erleichtern, sind die eingriffseitigen Flanken der Nute 19 abgeschrägt und keilartig erweitert und/oder die in Schwenkrichtung vorne liegenden Randstreifen der Flanken der Stützhebel 16 keilförmig verjüngt.In order to facilitate the engagement of the support lever 16 in the groove 19, the engagement-side flanks of the groove 19 are chamfered and wedge-like widened and / or the edge strips of the flanks of the support lever 16 lying at the front in the pivoting direction are tapered in a wedge shape.

Um die Stützhebel 16 zum Eingriff in die Nute 19 gelangen zu lassen, genügt aber nicht deren Vorspannung durch die Federn 17. Es ist auch erforderlich, daß der Betätigungshebel 24 freigegeben wird. Erreicht wird dieses beim Ausführungsbeispiel durch ein Betätigen des Riegelzylinders 25. Während des Walzens ist der Kolben des Riegelzylinders 25 eingefahren und die Enden 30 der Riegel 26 übergreifen die Leisten 31 der Einbaustücke 8. Damit werden mittels der Riegel 26 die Einbaustücke 8 mit den verschiebbaren Blöcken 3 verbunden. Sind die Arbeitswalzen 10 und 11 in ihre symmetrische Mittel- bzw. Null-Stellung gefahren, so kann der Riegelzylinder 25 betätigt werden. Hierbei dringen die Nasen 32 der Riegel 26 in ständerfeste Ausnehmungen ein und verriegeln damit die verschiebbaren Blöcke 3 in ihrer Nullstellung mit dem Ständer, so daß beim folgenden Vorgang des Ausfahrens ihre Lage sich nicht verändert und eine Entriegelung nach dem Einfahren des Tauschsatzes der Arbeitswalzen erfolgen kann. Gleichzeitig mit der Freigabe der Leisten 31 der Einbaustücke 8 werden aber auch die Betätigungshebel 24 der Stützhebel 16 freigegeben, so daß diese nunmehr unter Einwirkung ihrer Vorspannung durch die Feder 17 in die Nute 19 einzutreten vermögen. Hierbei werden nicht nur die Möglichkeiten zur Übernahme des Gewichtes der oberen Arbeitswalze 10 mit Einbaustücken 8 geschaffen, durch das Eintreten des Stützhebels 16 in die seiner Stärke angepaßten Nute 19 wird in Verbindung mit der Führung der Stützhebel in den Schlitzen 14 auch gleichzeitig eine Verriegelung der Arbeitswalzen-Einbausätze in axialer Richtung erzielt. Die Flanken 33 der Einbaustücke 8 sichern gleichzeitig eine stabile lage in bezug auf den Walzensatz eventuell beanspruchende Querkräfte. Der Walzensatz kann daher nunmehr nach Auffahren und Sichern der Ausfahrschiene 21 sowie Entlasten der oberen Biegezylinder 5 ausgefahren werden.In order to allow the support levers 16 to engage in the groove 19, their prestressing by the springs 17 is not sufficient, however. It is also necessary for the actuation lever 24 to be released. In the exemplary embodiment, this is achieved by actuating the locking cylinder 25. During the rolling, the piston of the locking cylinder 25 is retracted and the ends 30 of the locking bars 26 overlap the strips 31 of the mounting pieces 8 connected to the sliding blocks 3. If the work rolls 10 and 11 are moved into their symmetrical middle or zero position, the locking cylinder 25 can be actuated. Here, the lugs 32 of the latch 26 penetrate into the recesses fixed to the stand and thus lock the displaceable blocks 3 in their zero position with the stand, so that their position does not change during the following process of extending and an unlocking can take place after retracting the exchange rate of the work rolls . Simultaneously with the release of the strips 31 of the chocks 8, the actuating levers 24 of the support levers 16 are also released, so that they can now enter the groove 19 under the action of their bias by the spring 17. Here, not only the possibilities for taking over the weight of the upper work roll 10 with chocks 8 are created, by entering the support lever 16 into the groove 19 adapted to its strength, in conjunction with the guidance of the support lever in the slots 14, the work rolls are also simultaneously locked -Installation kits achieved in the axial direction. The flanks 33 of the chocks 8 simultaneously secure a stable position with respect to any transverse forces that may be required in relation to the roller set. The roller set can therefore now be extended after opening and securing the extension rail 21 and relieving the load on the upper bending cylinders 5.

Nach Einfahren eines aufgearbeiteten Austauschsatzes wird die obere Arbeitswalze 10 mit Einbaustücken 8 mittels der oberen Biegezylinder 5 leicht angehoben, und durch Einfahren des Riegelzylinders werden einerseits die Verriegelungen zwischen den verschiebbaren Blöcken 3 und dem Ständer aufgehoben, wobei die verschiebbaren Blöcke 3 gleichzeitig mit den Einbaustücken 8 verbunden werden. Durch Zurückschwenken des Betätigungshebels 24 bei der Bewegung des Riegels 26 werden dann gleichzeitig die Stützhebel 16 aus den Nuten 19 ausgehoben und gegen die Kraft der Federn 17 in ihre in der Fig. 1 dargestellte extreme Lage zurückgeschwenkt, so daß nunmehr nach der dem Walzen entsprechenden Beaufschlagung der Biegezylinder 5 der Anstich erfolgen kann.After retracting a refurbished replacement set, the upper work roll 10 with chocks 8 is slightly raised by means of the upper bending cylinder 5, and by retracting the locking cylinder, on the one hand, the interlocks between the displaceable blocks 3 and the stand are released, the displaceable blocks 3 simultaneously with the chocks 8 get connected. By swiveling the operating lever 24 back during the movement of the bolt 26, the support levers 16 are then simultaneously lifted out of the grooves 19 and pivoted back against the force of the springs 17 into their extreme position shown in FIG. 1, so that now after the application of the bending cylinder 5 corresponding to the rolling, the tapping can be done.

Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt; insbesondere läßt sich die Betätigung des Stützhebels 16 unterschiedlich gestalten. So können eigens für ihn vorgesehene Betätigungsvorrichtungen angeordnet sein, und bei doppelt wirkenden Antriebsvorrichtungen ist es auch möglich, auf eine Vorspannung mittels einer Feder zu verzichten. Es besteht auch die Möglichkeit, bei entsprechender Dimensionierung die vom Stützhebel aufgenommenen Kräfte über den Schwenkbolzen 15 zu übertragen, und selbstverständlich ist es möglich, den Schwenkbolzen und die ihn steuernde Welle einstückig auszuführen. In allen diesen Fällen wird für den Walzenwechsel ein Abstützen der oberen Arbeitswalze auf der unteren unter Einhaltung einer Distanz mit geringem Aufwande erwirkt, ohne daß es einer besonderen axialen Verschiebung der Arbeitswalzen gegeneinander bedarf, und gleichzeitig werden die Arbeitswalzen nicht nur in vorgegebener Distanz gehalten, sie werden auch in symmetrischer Stellung übereinander sicher fixiert.The invention is not limited to the illustrated embodiment; in particular, the actuation of the support lever 16 can be designed differently. For example, actuating devices provided for it can be arranged, and in the case of double-acting drive devices it is also possible to dispense with pretensioning by means of a spring. There is also the possibility, with appropriate dimensioning, of transmitting the forces absorbed by the support lever via the pivot pin 15, and of course it is possible to make the pivot pin and the shaft controlling it in one piece. In all of these cases, the upper work roll is supported for the roll change on the lower one while maintaining a distance with little effort, without requiring a special axial displacement of the work rolls against one another, and at the same time the work rolls are not only held at a predetermined distance, they are also securely fixed one above the other in a symmetrical position.

Claims (7)

  1. Roll stand with working rolls (10, 11) which are mounted in chocks and the upper one (10) of which is raisable from the lower one (11) by means of compensating cylinders and for the purpose of a roll change is held above the lower working roll (11) by mechanical means (16), which are associated with the chocks (6), for the avoidance of damage to its work surface, wherein the mechanical means comprises pivotable support levers (16) which in their operative setting are supported by their free ends on the oppositely disposed chock (6),
    characterised thereby that the two chocks (6) of one of the working rolls (10) each comprise two pivotable support levers (16), which in their basic setting engage around flanks of the oppositely disposed chocks (9) and which following raised upper working roll get into their operative setting by inward pivotation into a groove (19) arranged in the oppositely disposed chocks (9) and extending transversely to the direction of the roll axes.
  2. Roll stand according to claim 1, characterised thereby that the support levers (16) are associated with springs (17) tensioning these in direction towards one of their end settings and that pivot shafts (15, 23) receiving them are equipped with actuating levers (24).
  3. Roll stand according to claim 1 or 2, characterised thereby that the pivot pins (15) of the support levers (16) are mounted with play and that the contours (34) of the head of the support levers (16) in conjunction with the contours of the slots (14) receiving them accept the load to be supported.
  4. Roll stand according to one of claims 1 to 3, characterised thereby that the contours of the head of the support levers in conjunction with the contour of the slot (14) receiving them and/or flank regions of the support lever (16) in conjunction with contours of the slot receiving them limit the pivot range of the support lever as abutments.
  5. Roll stand according to one of claims 1 to 4, characterised thereby that the width of the groove (19) receiving the support levers (16) pivoting in exceeds the thickness of the support levers only slightly and that the flanks of the support levers at the side thereof facing the groove taper in wedge shape and/or the groove (19) receiving the support levers (16) pivoting in widen in wedge shape in direction towards the support levers (16) pivoting in.
  6. Roll stand according to one of claims 1 to 5, characterised thereby that drive devices are associated with the actuating levers (24).
  7. Roll stand according to one of claims 1 to 5, characterised thereby that the actuating levers (24) engage control cams reaching into the working range of the locks (26) causing the locking of the chocks (8) and/or the locking of displaceable blocks (3).
EP91117631A 1990-10-29 1991-10-16 Rolling stand comprising means for supporting the upper working roll in a spaced manner Expired - Lifetime EP0483599B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4034436A DE4034436A1 (en) 1990-10-29 1990-10-29 ROLLING DEVICE WITH ARRANGEMENT FOR DISTANTLY SUPPORTING THE UPPER WORKING ROLLER
DE4034436 1990-10-29

Publications (3)

Publication Number Publication Date
EP0483599A2 EP0483599A2 (en) 1992-05-06
EP0483599A3 EP0483599A3 (en) 1992-08-26
EP0483599B1 true EP0483599B1 (en) 1996-07-10

Family

ID=6417285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91117631A Expired - Lifetime EP0483599B1 (en) 1990-10-29 1991-10-16 Rolling stand comprising means for supporting the upper working roll in a spaced manner

Country Status (12)

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US (1) US5195346A (en)
EP (1) EP0483599B1 (en)
KR (1) KR920007706A (en)
CN (1) CN1029595C (en)
AT (1) ATE140167T1 (en)
DE (2) DE4034436A1 (en)
ES (1) ES2089083T3 (en)
LT (1) LT3735B (en)
LV (1) LV10935B (en)
RU (1) RU2068743C1 (en)
TW (1) TW210295B (en)
UA (1) UA26210A (en)

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DE4228164B4 (en) * 1992-08-25 2007-09-27 Sms Demag Ag Device for distance positioning of bearing in bearing chocks roller pairs
ATE162436T1 (en) * 1993-11-29 1998-02-15 Danieli Off Mecc DEVICE FOR AXIAL TIGHTENING/LOOSENING OF THE ROLLER CLAMPING PIECES IN A ROLL STAND
DE19508972A1 (en) * 1995-03-13 1996-09-19 Schloemann Siemag Ag Device for the automatic positioning of roll stands with caliber rolls and these upstream rolling beams and rolling fittings on the center of the roll
EP1772203A1 (en) * 2005-10-10 2007-04-11 VAI Industries (UK) Limited Roll bending device
AT504208B1 (en) * 2006-04-21 2008-04-15 Siemens Vai Metals Tech Gmbh BENDING DEVICE FOR TWO WORKING ROLLERS OF A ROLLING MILL
DE102009058876A1 (en) * 2009-01-23 2010-07-29 Sms Siemag Ag Bending and balancing device for axially displaceable work rolls of a roll stand
CN102602208B (en) * 2012-02-28 2014-08-20 上海交通大学 Full-hydraulic driving roll fin impress device
CN111054760B (en) * 2019-12-09 2021-11-23 安徽工业大学 Vibration suppression device for rolling mill
EP4163027A1 (en) * 2021-10-05 2023-04-12 Primetals Technologies Limited Rolling mill stand and method of changing a work roll assembly thereof

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Publication number Priority date Publication date Assignee Title
US2090402A (en) * 1936-03-16 1937-08-17 Morgan Construction Co Rolling mill
JPS4517165Y1 (en) * 1966-11-30 1970-07-15
JPS5039619B2 (en) * 1972-07-17 1975-12-18
DE2326389C3 (en) * 1973-05-24 1980-07-31 Maschinen- Und Werkzeugbau Gmbh, 4600 Dortmund Four-high mill
US3877276A (en) * 1973-12-28 1975-04-15 Mesta Machine Co Mill roll changing system including a cantilevered roll assembly
SU544484A2 (en) * 1975-05-26 1977-01-30 Предприятие П/Я Г-4586 Working cage
SU576128A1 (en) * 1976-04-26 1977-10-15 Предприятие П/Я А-7697 Multi-roll mill,particularly for rulling flattened strip
SU738702A1 (en) * 1978-03-06 1980-06-06 Магнитогорский горно-металлургический институт им.Г.И.Носова Mechanism for axially holding workroll pad
JPS6056563B2 (en) * 1980-10-24 1985-12-11 新日本製鐵株式会社 Rolling mill yoke attachment/detachment device
DE3211378A1 (en) * 1982-03-27 1983-12-29 Mannesmann AG, 4000 Düsseldorf ROLLER SUPPORT DEVICE FOR WORKING ROLLER CHANGE ON ROLLING DEVICES
DE3815454A1 (en) * 1988-05-06 1989-11-16 Schloemann Siemag Ag BENDING AND BALANCING DEVICE FOR AXIAL SLIDING ROLLS OF A ROLLING DEVICE

Also Published As

Publication number Publication date
ES2089083T3 (en) 1996-10-01
DE4034436A1 (en) 1992-04-30
UA26210A (en) 1999-07-19
LV10935B (en) 1996-06-20
LV10935A (en) 1995-12-20
EP0483599A2 (en) 1992-05-06
US5195346A (en) 1993-03-23
CN1060982A (en) 1992-05-13
LT3735B (en) 1996-02-26
CN1029595C (en) 1995-08-30
EP0483599A3 (en) 1992-08-26
DE59107990D1 (en) 1996-08-14
ATE140167T1 (en) 1996-07-15
TW210295B (en) 1993-08-01
KR920007706A (en) 1992-05-27
LTIP1603A (en) 1995-07-25
RU2068743C1 (en) 1996-11-10

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