EP0484584B1 - Rolling stand - Google Patents
Rolling stand Download PDFInfo
- Publication number
- EP0484584B1 EP0484584B1 EP19900121457 EP90121457A EP0484584B1 EP 0484584 B1 EP0484584 B1 EP 0484584B1 EP 19900121457 EP19900121457 EP 19900121457 EP 90121457 A EP90121457 A EP 90121457A EP 0484584 B1 EP0484584 B1 EP 0484584B1
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- EP
- European Patent Office
- Prior art keywords
- rolls
- roll
- work
- roll stand
- rolling
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
- B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
Definitions
- the invention relates to a roll stand for the cold and hot rolling of flat material, in particular for reducing and skin-passaging metal strips, with two cambered work rolls, two support rolls being provided for the lower and / or upper work roll, which are used for the stepless change of the support effect by means of actuators are pivotally mounted around the work rolls.
- a roll stand In order to change the crowning in the roll gap, a roll stand is known, in which two back-up rolls are provided for the unbombed lower and upper work rolls, which are pivoted in pairs around the work rolls for stepless change of the support effect by means of actuators. In this way, it is only possible to vary the support angle and thereby the support effect with respect to the unbombed work roll assigned in each case (see SU-A 1 514 435).
- a roll stand in which support rolls are arranged or arranged after the work rolls, which are only slidably mounted.
- the adjustment of the back-up rolls or the back and forth / up and down movement of the back-up rolls to compensate for the crowning takes place only within a very small range, since under certain circumstances if the back-up rolls move too far apart, contact with the assigned work roll and consequently, any support effect for this work roll can soon be lost (cf. FR-A-23 46 064).
- the previously known measures are regularly complex, with the additional risk there is that the contact between work and backup rolls does not always remain.
- the invention seeks to remedy this.
- the invention has for its object to provide a roll stand of the type described above, in which a stepless change of the crowning in the roll gap during the rolling process is possible in a simple and quick manner by pivoting the support rollers, it also being ensured that the contact between Work and backup rolls are preserved under all conditions.
- the crowning of the work rolls is designed for 100% of the maximum rolling force, so that when the rolling force drops, the deflection of the lower and / or upper work roll can be changed so that the sum of the bending deformation on the upper and lower work roll is the sum of the crowning used corresponds. It will preferably be limited to providing two supports only for the lower work roll.
- the upper work roll is then equipped in a known manner by only a single backup roll and with an adjustment system. Assuming that the upper back-up roll and the two lower back-up rolls have the same diameter and the two lower back-up rolls are arranged with an exit angle of 45 ° to the center of the lower work rolls, the diameter ratio of the back-up rolls / work rolls is approx.2.4.
- the two lower support rollers have the same support effect as the only upper support roller.
- an increased spreading effect is achieved, which, however, permits an increased deflection of the lower work roll in order to always correct the bending line and consequently crown to achieve an ideal roll gap.
- the invention provides that the lower and / or upper work roll are supported on the outer support rolls with the interposition of at least one intermediate roll, at least two support rolls on one Circular path is pivotally mounted around the center of the intermediate roller assigned to them for the stepless change of the supporting effect.
- a height adjustment of the entire rolling stand can also be provided for the adjustment of the pass line.
- the support rollers are preferably pivotably supported with segment-type bearing blocks with the interposition of rolling elements in a semi-cylindrical bearing shell. Storage in sliding or hydrostatic bearing shells is also possible.
- the measures described achieve smooth pivoting of the support rollers. This is especially true when actuators, z. On the pedestals and on the stands of the rolling stand.
- the invention further provides that support rollers and, if necessary, the intermediate rollers and the actuators are arranged axially symmetrically to a vertical axis of symmetry leading through the work rollers.
- the support rollers can be pivoted individually or together by an equal or different pivot angle by means of the actuators. This means that the crowning can be changed continuously for every rolling process, even if it is not a reduction but only a dressing of the rolling stock.
- the invention also relates to a method for changing the crowning of a work roll supported by means of two supporting rolls in the roll gap during the rolling process, depending on the respective rolling force, after which the supporting effect is achieved by pivoting the two pivotably mounted supporting rolls by one by the respective rolling force predetermined pivot angle on a circular path around the center of the work roll is continuously changed such that the sum of the deflections on the upper and lower work roll corresponds to the sum of the unused crowning.
- the figures show a roll stand 1 for the cold and hot rolling of flat material, in particular for reducing and skin-passaging metal strips.
- this roll stand has two cambered work rolls 2a, 2b and support rolls 3, 4 for these work rolls.
- Two support rollers 4a, 4b are provided for the lower work roll 2b.
- a backup roller 3 is sufficient for the upper work roller 2a. According to a variant, however, two backup rollers 3a, 3b are also provided.
- the two support rollers 3a, 3b and 4a, 4b are pivotally mounted on a circular path B around the center M of the lower and upper work rollers 2a, 2b for continuously changing their support effect.
- the support rollers 4a, 4b are mounted in segment-like bearing blocks 5.
- the segment-like bearing blocks 5 are pivotally mounted in a semi-cylindrical bearing shell 7 with the interposition of rolling elements 6.
- actuators 8 - according to the exemplary embodiment, hydraulically actuatable cylinder piston arrangements - are articulated.
- the lower work roll 2b is supported with the interposition of an intermediate roll 9 on the two support rollers 4a, 4b, the support rollers 4a, 4b in this case on a circular path B1 around the center M1 of the intermediate roller 9 for continuous change the support is pivoted.
- the support rollers 3a, 3b or 4a, 4b and, if appropriate, the intermediate roller 9 and the actuating drives 8 are arranged axially symmetrically with respect to a vertical axis of symmetry S leading through the work rollers 2a, 2b.
- the support rollers 3a, 3b and 4a, 4b can be pivoted individually or together by an identical or different pivoting angle ⁇ by means of the actuators 8.
- the swiveling of the two lower support rolls 4a, 4b (possibly also the two upper support rolls) continuously and quickly achieves a continuous change in the crowning of the work rolls 2a, 2b in the roll gap during the rolling process.
- FIGS. 7 and 8 show the elastic bending behavior of the rolls at a pivoting position of 45 ° or 60 °.
- the cambered work rolls 2a, 2b and support rolls 3, 4a, 4b are cylindrical and the elastic deflection is exaggerated. It can be seen that the elastic deflection 11 in the 60 ° swivel position is greater than the deflection 10 in the 45 ° swivel position.
- the application of the teaching according to the invention is also possible for multi-roll mill stands if the diameter ratios are taken into account accordingly.
- the 20-roll mill shown in Fig. 9 has, for example, eight support rollers 3, 4, of which two lower and two upper support rollers 4a, 4b and 3a, 3b around the center M1 of the intermediate roller 9 assigned to them for continuous change the support is pivoted.
- the roll stand can be driven on the work rolls or backup rolls.
- the rolling can be supported by appropriate strip pulls in front of and behind the roll gap.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
Die Erfindung betrifft ein Walzgerüst für das Kalt- und Warmwalzen von Flachmaterial, insbesondere zum Reduzieren und Dressieren von Metallbändern, mit zwei bombierten Arbeitswalzen, wobei für die untere und/oder obere Arbeitswalze jeweils zwei Stützwalzen vorgesehen sind, die zur stufenlosen Änderung der Stützwirkung mittels Stelltriebe um die Arbeitswalzen schwenkbar gelagert sind.The invention relates to a roll stand for the cold and hot rolling of flat material, in particular for reducing and skin-passaging metal strips, with two cambered work rolls, two support rolls being provided for the lower and / or upper work roll, which are used for the stepless change of the support effect by means of actuators are pivotally mounted around the work rolls.
Um eine Veränderung der Bombierung im Walzspalt zu erreichen, kennt man ein Walzgerüst, bei dem jeweils zwei Stützwalzen für die unbombierte untere und obere Arbeitswalze vorgesehen sind, die zur stufenlosen Änderung der Stützwirkung mittels Stelltrieben paarweise um die Arbeitswalzen schwenkbar gelagert sind. Auf diese Weise läßt sich lediglich der Stützwinkel und dadurch die Stützwirkung in bezug auf die jeweils zugeordnete unbombierte Arbeitswalze variieren (vgl. SU-A 1 514 435).In order to change the crowning in the roll gap, a roll stand is known, in which two back-up rolls are provided for the unbombed lower and upper work rolls, which are pivoted in pairs around the work rolls for stepless change of the support effect by means of actuators. In this way, it is only possible to vary the support angle and thereby the support effect with respect to the unbombed work roll assigned in each case (see SU-A 1 514 435).
Weiterhin ist ein Walzgerüst bekannt, bei dem den Arbeitswalzen Stützwalzen zu- oder nachgeordnet sind, die lediglich verschiebbar gelagert sind. Die Verstellung der Stützwalzen bzw. das Hin- und Her-/oder Auf- und Niederbewegen der Stützwalzen zum Ausgleich der Bombierung findet dabei nur innerhalb eines sehr kleinen Bereichs statt, da unter Umständen bei zu weitem Auseinanderfahren der Stützwalzen der Kontakt mit der zugeordneten Arbeitswalze und folglich jede Stützwirkung für diese Arbeitswalze alsbald verlorengehen kann (vgl. FR-A- 23 46 064). - Die vorbekannten Maßnahmen sind regelmäßig aufwendig, wobei zudem die Gefahr besteht, daß der Kontakt zwischen Arbeits- und Stützwalzen nicht immer bestehen bleibt. - Hier will die Erfindung Abhilfe schaffen.Furthermore, a roll stand is known in which support rolls are arranged or arranged after the work rolls, which are only slidably mounted. The adjustment of the back-up rolls or the back and forth / up and down movement of the back-up rolls to compensate for the crowning takes place only within a very small range, since under certain circumstances if the back-up rolls move too far apart, contact with the assigned work roll and consequently, any support effect for this work roll can soon be lost (cf. FR-A-23 46 064). - The previously known measures are regularly complex, with the additional risk there is that the contact between work and backup rolls does not always remain. - The invention seeks to remedy this.
Der Erfindung liegt die Aufgabe zugrunde, ein Walzgerüst der eingangs beschriebenen Art zu schaffen, bei dem eine stufenlose Veränderung der Bombierung im Walzspalt während des Walzvorganges durch Verschwenkung der Stützwalzen auf einfache und schnelle Weise möglich ist, wobei zusätzlich sichergestellt sein soll, daß der Kontakt zwischen Arbeits- und Stützwalzen unter allen Bedingungen erhalten bleibt.The invention has for its object to provide a roll stand of the type described above, in which a stepless change of the crowning in the roll gap during the rolling process is possible in a simple and quick manner by pivoting the support rollers, it also being ensured that the contact between Work and backup rolls are preserved under all conditions.
Diese Aufgabe löst die Erfindung bei einem gattungsgemäßen Walzgerüst dadurch, daß die Stützwalzen einzeln um einen gleichen oder ungleichen Schwenkwinkel auf einer Kreisbahn um den Mittelpunkt der unteren bzw. oberen Arbeitswalze verschwenkbar sind. - Diese Maßnahmen der Erfindung haben zur Folge, daß sich die Durchbiegung und folglich die Bombierung der unteren und/oder oberen Arbeitswalze in Abhängigkeit von der jeweiligen Walzkraft durch eine Schwenkbewegung der betreffenden Stützwalzen stufenlos derart verändern läßt, daß stets ein gleichmäßiger Walzspalt verwirklicht ist und die Arbeits- und Stützwalzen zu keinem Zeitpunkt den Kontakt verlieren. Die Bombierung der Arbeitswalzen wird auf jeweils 100 % der maximalen Walzkraft ausgelegt, so daß bei abfallender Walzkraft die Durchbiegung der unteren und/oder oberen Arbeitswalze so verändert werden kann, daß die Summe der Biegeverformung an der oberen und unteren Arbeitswalze der Summe der verbrauchten Bombierungen entspricht. Bevorzugt wird man sich darauf beschränken, lediglich für die untere Arbeitswalze zwei Stützen vorzusehen. Die obere Arbeitswalze ist dann in bekannter Weise durch lediglich eine einzige Stützwalze und mit einem Anstellsystem ausgerüstet. Unter der Annahme, daß die obere Stützwalze und die beiden unteren Stützwalzen den gleichen Durchmesser aufweisen und die beiden unteren Stützwalzen mit einem Ausgangswinkel von 45° zum Mittelpunkt der unteren Arbeitswalzen angeordnet sind, ergibt sich ein Durchmesserverhältnis Stützwalzen / Arbeitswalzen von ca. 2,4. In dieser angenommenen Ausgangsstellung von 45° haben die beiden unteren Stützwalzen die gleiche Stützwirkung wie die einzige obere Stützwalze. Durch das Auseinanderschwenken der beiden unteren Stützwalzen wird eine erhöhte Spreizwirkung erreicht, welche jedoch eine erhöhte Durchbiegung der unteren Arbeitswalze zuläßt, um stets eine Korrektur der Biegelinie und folglich Bombierung zur Erzielung eines idealen Walzspaltes zu erreichen.This object is achieved by the invention in a roll stand of the generic type in that the support rolls can be pivoted individually by an equal or different pivot angle on a circular path around the center of the lower or upper work roll. - These measures of the invention have the consequence that the deflection and consequently the curvature of the lower and / or upper work roll can be changed continuously depending on the respective rolling force by a pivoting movement of the supporting rolls in question in such a way that a uniform roll gap is always realized and the Work and backup rolls never lose contact. The crowning of the work rolls is designed for 100% of the maximum rolling force, so that when the rolling force drops, the deflection of the lower and / or upper work roll can be changed so that the sum of the bending deformation on the upper and lower work roll is the sum of the crowning used corresponds. It will preferably be limited to providing two supports only for the lower work roll. The upper work roll is then equipped in a known manner by only a single backup roll and with an adjustment system. Assuming that the upper back-up roll and the two lower back-up rolls have the same diameter and the two lower back-up rolls are arranged with an exit angle of 45 ° to the center of the lower work rolls, the diameter ratio of the back-up rolls / work rolls is approx.2.4. In this assumed starting position of 45 °, the two lower support rollers have the same support effect as the only upper support roller. By swiveling the two lower support rollers apart, an increased spreading effect is achieved, which, however, permits an increased deflection of the lower work roll in order to always correct the bending line and consequently crown to achieve an ideal roll gap.
Für den Fall, daß an sich größere Stützwalzen erforderlich sind, bzw. ein größerer Regelbereich verlangt wird, sieht die Erfindung vor, daß die untere und/oder obere Arbeitswalze unter Zwischenschaltung zumindest einer Zwischenwalze an äußeren Stützwalzen abgestützt sind, wobei zumindest zwei Stützwalzen auf einer Kreisbahn um den Mittelpunkt der ihnen zugeordneten Zwischenwalze zur stufenlosen Änderung der Stützwirkung schwenkbar gelagert sind. Grundsätzlich kann für die Einstellung der Paßlinie auch eine Höhenverstellung des gesamten Walzgerüstes vorgesehen werden.In the event that larger backup rolls are required, or a larger control range is required, the invention provides that the lower and / or upper work roll are supported on the outer support rolls with the interposition of at least one intermediate roll, at least two support rolls on one Circular path is pivotally mounted around the center of the intermediate roller assigned to them for the stepless change of the supporting effect. In principle, a height adjustment of the entire rolling stand can also be provided for the adjustment of the pass line.
Weitere vorteilhafte Ausbildungsformen der Erfindung sind im folgenden aufgeführt. Vorzugsweise sind die Stützwalzen mit segmentartigen Lagerböcken unter Zwischenschaltung von Wälzkörpern in einer halbzylindrischen Lagerschale schwenkbar gelagert. Eine Lagerung in Gleit- oder hydrostatischen Lagerschalen ist ebenfalls möglich. Durch die beschriebenen Maßnahmen wird ein leichtgängiges Verschwenken der Stützwalzen erreicht. Das geht insbesondere dann, wenn an den Lagerböcken und an den Ständern des Walzgerüstes Stelltriebe, z. B. hydraulisch oder pneumatisch betätigbare Zylinderkolbenanordnungen oder mechanisch betätigbare Spindeln, abgelenkt sind. Weiter sieht die Erfindung vor, daß Stützwalzen und gegebenenfalls die Zwischenwalzen sowie die Stelltriebe achssymmetrisch zu einer durch die Arbeitswalzen führenden vertikalen Symmetrieachse angeordnet sind. Auf diese Weise wird erreicht, daß die Stützwalzen einzeln oder gemeinsam um einen gleichen oder ungleichen Schwenkwinkel mittels der Stelltriebe verschwenkbar sind. Dadurch ist eine stufenlose Veränderung der Bombierung für jeden Walzvorgang möglich, auch wenn es sich nicht um eine Reduzierung sondern lediglich um eine Dressierung des Walzgutes handelt.Further advantageous embodiments of the invention are listed below. The support rollers are preferably pivotably supported with segment-type bearing blocks with the interposition of rolling elements in a semi-cylindrical bearing shell. Storage in sliding or hydrostatic bearing shells is also possible. The measures described achieve smooth pivoting of the support rollers. This is especially true when actuators, z. On the pedestals and on the stands of the rolling stand. B. hydraulically or pneumatically actuated cylinder piston assemblies or mechanically actuated spindles are deflected. The invention further provides that support rollers and, if necessary, the intermediate rollers and the actuators are arranged axially symmetrically to a vertical axis of symmetry leading through the work rollers. In this way it is achieved that the support rollers can be pivoted individually or together by an equal or different pivot angle by means of the actuators. This means that the crowning can be changed continuously for every rolling process, even if it is not a reduction but only a dressing of the rolling stock.
Gegenstand der Erfindung ist auch ein Verfahren zum Ändern der Bombierung von einer mittels jeweils zwei Stützwalzen abgestützten Arbeitswalze im Walzspalt während des Walzvorganges in Abhängigkeit von der jeweiligen Walzkraft, wonach die Stützwirkung durch Verschwenken der beiden schwenkbar gelagerten Stützwalzen um einen durch die jeweilige Walzkraft vorgegebenen Schwenkwinkel auf einer Kreisbahn um den Mittelpunkt der Arbeitswalze stufenlos derart verändert wird, daß die Summe der Durchbiegungen an der oberen und unteren Arbeitswalze der Summe der unverbrauchten Bombierungen entspricht.The invention also relates to a method for changing the crowning of a work roll supported by means of two supporting rolls in the roll gap during the rolling process, depending on the respective rolling force, after which the supporting effect is achieved by pivoting the two pivotably mounted supporting rolls by one by the respective rolling force predetermined pivot angle on a circular path around the center of the work roll is continuously changed such that the sum of the deflections on the upper and lower work roll corresponds to the sum of the unused crowning.
Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert.The invention is explained in more detail below with reference to a drawing which represents only one exemplary embodiment.
Es zeigen:
- Fig. 1
- ein erfindungsgemäßes Walzgerüst in Seitenansicht,
- Fig. 2
- den Gegenstand nach Fig. 1 in Frontansicht,
- Fig. 3
- eine schematische Anordnung der Arbeits- und Stützwalzen für den Gegenstand nach Fig. 1,
- Fig. 4
- eine abgewandelte Ausführungsform des Gegenstandes nach Fig. 3 mit zwei Stützwalzen auch für die obere Arbeitswalze,
- Fig. 5
- eine weitere abgewandelte Ausführungsform des Gegenstandes nach Fig. 3 mit einer Zwischenwalze,
- Fig. 6
- den Gegenstand nach Fig. 3 bei 60°-Schwenkdarstellung der unteren Stützwalzen,
- Fig. 7
- die elastische Durchbiegung der Walzen in 45°-Schwenkstellung,
- Fig. 8
- die elastische Durchbiegung der Walzen in 60°-Schwenkstellung und
- Fig. 9
- die Anwendung der erfindungsgemäßen Lehre bei einem Vielrollen-Walzwerk.
- Fig. 1
- a roll stand according to the invention in side view,
- Fig. 2
- 1 in front view,
- Fig. 3
- 2 shows a schematic arrangement of the work and backup rolls for the object according to FIG. 1,
- Fig. 4
- 3 with two back-up rolls also for the upper work roll,
- Fig. 5
- 3 shows a further modified embodiment of the object according to FIG. 3 with an intermediate roller,
- Fig. 6
- 3 with a 60 ° swivel representation of the lower support rollers,
- Fig. 7
- the elastic deflection of the rollers in the 45 ° swivel position,
- Fig. 8
- the elastic deflection of the rollers in the 60 ° swivel position and
- Fig. 9
- the application of the teaching according to the invention in a multi-roll mill.
In den Figuren ist ein Walzgerüst 1 für das Kalt- und Warmwalzen von Flachmaterial, insbesondere zum Reduzieren und Dressieren von Metallbändern dargestellt. Dieses Walzgerüst weist in seinem grundsätzlichen Aufbau zwei bombierte Arbeitswalzen 2a, 2b und Stützwalzen 3, 4 für diese Arbeitswalzen auf. Für die untere Arbeitswalze 2b sind jeweils zwei Stützwalzen 4a, 4b vorgesehen. Für die obere Arbeitswalze 2a genügt eine Stützwalze 3. Nach einer Variante sind jedoch ebenfalls zwei Stützwalzen 3a, 3b vorgesehen. Die beiden Stützwalzen 3a, 3b bzw. 4a, 4b sind auf einer Kreisbahn B um den Mittelpunkt M der unteren bzw. oberen Arbeitswalze 2a, 2b zur stufenlosen Änderung ihrer Stützwirkung schwenkbar gelagert. Die Stützwalzen 4a, 4b sind in segmentartigen Lagerböcken 5 gelagert. Die segmentartigen Lagerböcke 5 sind unter Zwischenschaltung von Wälzkörpern 6 in einer halbzylindrischen Lagerschale 7 schwenkbar gelagert. An den Lagerböcken 5 und an den Ständern des Walzgerüstes 1 sind Stelltriebe 8 - nach dem Ausführungsbeispiel hydraulisch betätigbare Zylinderkolbenanordnungen - angelenkt.The figures show a
Nach einer abgewandelten Ausführungsform ist die untere Arbeitswalze 2b unter Zwischenschaltung einer Zwischenwalze 9 auf den beiden Stützwalzen 4a, 4b abgestützt, wobei die Stützwalzen 4a, 4b in diesem Fall auf einer Kreisbahn B₁ um den Mittelpunkt M₁ der Zwischenwalze 9 zur stufenlosen Änderung der Stützwirkung schwenkbar gelagert sind. Die Stützwalzen 3a, 3b bzw. 4a, 4b und ggf. Zwischenwalze 9 sowie die Stelltriebe 8 sind achssymmetrisch zu einer durch die Arbeitswalzen 2a, 2b führenden vertikalen Symmetrieachse S angeordnet. Die Stützwalzen 3a, 3b bzw. 4a, 4b sind einzeln oder gemeinsam um einen gleichen oder ungleichen Schwenkwinkel α mittels der Stelltriebe 8 verschwenkbar. Stets wird durch das Verschwenken der beiden unteren Stützwalzen 4a, 4b (ggf. auch der beiden oberen Stützwalzen) eine stufenlose Veränderung der Bombierung der Arbeitswalzen 2a, 2b im Walzspalt während des Walzvorganges in einfacher Weise und schnell erreicht.According to a modified embodiment, the
Die Figuren 7 und 8 zeigen das elastische Biegeverhalten der Walzen bei 45°- bzw. 60°-Schwenkstellung. Zur besseren Darstellung sind die an sich bombierten Arbeitswalzen 2a, 2b und Stützwalzen 3, 4a, 4b zylindrisch und die elastische Durchbiegung überhöht dargestellt. Man erkennt, daß die elastische Durchbiegung 11 in 60°-Schwenkstellung größer ist als die Durchbiegung 10 in der 45°-Schwenkstellung.FIGS. 7 and 8 show the elastic bending behavior of the rolls at a pivoting position of 45 ° or 60 °. For a better representation, the cambered work rolls 2a, 2b and support rolls 3, 4a, 4b are cylindrical and the elastic deflection is exaggerated. It can be seen that the
Die Anwendung der erfindungsgemäßen Lehre ist bei entsprechender Berücksichtigung der Durchmesser-Verhältnisse auch für Vielrollen-Walzgerüste möglich. Das in Fig. 9 dargestellte 20-Rollen-Walzwerk weist beispielsweise acht Stützwalzen 3, 4 auf, von denen jeweils zwei untere und zwei obere Stützwalzen 4a, 4b bzw. 3a, 3b um den Mittelpunkt M₁ der ihnen jeweils zugeordneten Zwischenwalze 9 zur stufenlosen Änderung der Stützwirkung schwenkbar gelagert sind.The application of the teaching according to the invention is also possible for multi-roll mill stands if the diameter ratios are taken into account accordingly. The 20-roll mill shown in Fig. 9 has, for example, eight
Weiterhin besteht die Möglichkeit, bei der Schwenkbewegung der Stützwalzen von der idealen Kreisbahn um den Mittelpunkt der berührenden Walze abzuweichen, sofern der daraus resultierende Fehler im Abstand der Arbeitswalzen mittels des Walzenanstellsystems ausgeglichen wird. Auch der Walzenabschliff kann außer durch Beilagen auf diese Weise ausgeglichen werden. Der Antrieb des Walzengerüstes kann, wie herkömmlich, an den Arbeitswalzen oder Stützwalzen erfolgen. Wie bekannt, kann das Walzen durch entsprechende Bandzüge vor und hinter dem Walzspalt unterstützt werden.Furthermore, there is the possibility of deviating from the ideal circular path around the center of the contacting roller during the pivoting movement of the support rollers, provided that the resulting error in the distance between the work rollers is compensated for by means of the roller adjustment system. The grinding of the rolls can also be compensated in this way, in addition to using shims. As usual, the roll stand can be driven on the work rolls or backup rolls. As is known, the rolling can be supported by appropriate strip pulls in front of and behind the roll gap.
Claims (7)
- A roll stand (1) for the cold- and hot-rolling of flat material, particularly for the reduction and temper-rolling of metal strip, with two cambered work rolls (2a, 2b), wherein two back-up rolls (3a, 3b; 4a, 4b) are provided for the lower and/or upper work roll (2a, 2b) in each case, which back-up rolls are pivotally mounted around the work rolls (2a, 2b) for continuously altering the supporting effect by means of adjusting drives (8), characterised in that the back-up rolls (3a, 3b; 4a, 4b) can be pivoted individually by the same or a different angle of pivot (α) on a circular path (B) about the central point (M) of the lower or upper work roll (2a, 2b).
- A roll stand (1) according to claim 1, characterised in that the lower and/or upper work roll (2a, 2b) is supported on outer back-up rolls with at least one intermediate roll (9) interposed therebetween, wherein at least two back-up rolls (3a, 3b; 4a, 4b) are pivotally mounted on a circular path (B₁ ) about the central point (M₁) of the associated inner intermediate roll (9) for continuously altering the supporting effect.
- A roll stand (1) according to claim 1 or 2, characterised in that the back-up rolls (4a, 4b) are mounted, by means of segment-like bearing blocks (5) and with the interposition of rolling bodies (6), in a semicylindrical bearing shell (7) or in a plain or hydrostatic bearing shell.
- A roll stand (1) according to any one of claims 1 to 3, characterised in that adjusting drives (8), e.g. hydraulically or pneumatically operated cylinder-and-piston arrangements or mechanically operated spindles, are articulated to the bearing blocks and to the columns of the roll stand (1).
- A roll stand (1) according to any one of claims 1 to 4, characterised in that the back-up rolls (3a, 3b; 4a, 4b), and optionally the intermediate rolls (9) and the adjusting drives (8), are disposed axially symmetrically with respect to a vertical axis of symmetry (S) passing through the work rolls (2a, 2b).
- A roll stand (1) according to any one of claims 1 to 5, characterised in that the back-up rolls (3a, 3b; 4a, 4b) can be pivoted individually or jointly by the same or a different angle of pivot (α) by means of the adjusting drives (8).
- A method of varying the camber of a work roll (2b), which is supported by two back-up rolls (4a, 4b) in each case, in the roll gap during the rolling operation depending on the roll separating force each time, wherein the supporting effect is continuously varied by means of the pivoting of the two pivotally mounted back-up rolls (4a, 4b), by an angle of pivot (α) predetermined by the roll separating force each time, along a circular path (B) about the central point (M) of the work roll (2b) in such a way that the sum of the deflections at the upper and lower work rolls (2a, 2b) corresponds to the sum of the cambers unused.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19900121457 EP0484584B1 (en) | 1990-11-09 | 1990-11-09 | Rolling stand |
| DE90121457T DE59003031D1 (en) | 1990-11-09 | 1990-11-09 | Mill stand. |
| CA 2055184 CA2055184A1 (en) | 1990-11-09 | 1991-11-08 | Rolling mill stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19900121457 EP0484584B1 (en) | 1990-11-09 | 1990-11-09 | Rolling stand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0484584A1 EP0484584A1 (en) | 1992-05-13 |
| EP0484584B1 true EP0484584B1 (en) | 1993-10-06 |
Family
ID=8204698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900121457 Expired - Lifetime EP0484584B1 (en) | 1990-11-09 | 1990-11-09 | Rolling stand |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0484584B1 (en) |
| CA (1) | CA2055184A1 (en) |
| DE (1) | DE59003031D1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE566683C (en) * | 1929-01-29 | 1934-10-31 | Heraeus Vacuumschmelze A G | Rolling mill with support and work rolls |
| GB523777A (en) * | 1938-12-14 | 1940-07-23 | Robert Bass | Rolling-mills |
| US2566679A (en) * | 1943-02-25 | 1951-09-04 | Armzen Company | Rolling mill and lubrication method and means therefor |
| CH422686A (en) * | 1963-02-28 | 1966-10-31 | Lee Wilson Engineering S A | Rolling mill for the treatment of metal strips and processes for operating the rolling mill |
| FR2257360A1 (en) * | 1974-01-14 | 1975-08-08 | Inst Chernoi Metallurgii | Rolling mill using rotating ring frames - to give rigid structure and reduce radial stress on bearings |
| FI64902C (en) * | 1976-03-30 | 1984-02-10 | Wiik & Hoeglund | COMPENSATION FOR COMPENSATION OF VALUES AND ENVIRONMENT |
| SU1514435A1 (en) * | 1988-01-28 | 1989-10-15 | Dn Metall Inst | Multiroll working stand |
-
1990
- 1990-11-09 EP EP19900121457 patent/EP0484584B1/en not_active Expired - Lifetime
- 1990-11-09 DE DE90121457T patent/DE59003031D1/en not_active Expired - Fee Related
-
1991
- 1991-11-08 CA CA 2055184 patent/CA2055184A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0484584A1 (en) | 1992-05-13 |
| DE59003031D1 (en) | 1993-11-11 |
| CA2055184A1 (en) | 1992-05-10 |
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