EP1056553B1 - Rolling mill with working rollers and multipart support rollers - Google Patents

Rolling mill with working rollers and multipart support rollers Download PDF

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Publication number
EP1056553B1
EP1056553B1 EP99916753A EP99916753A EP1056553B1 EP 1056553 B1 EP1056553 B1 EP 1056553B1 EP 99916753 A EP99916753 A EP 99916753A EP 99916753 A EP99916753 A EP 99916753A EP 1056553 B1 EP1056553 B1 EP 1056553B1
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EP
European Patent Office
Prior art keywords
main body
eccentric
rolling mill
roll
bearings
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EP99916753A
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German (de)
French (fr)
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EP1056553A1 (en
Inventor
Dieter Figge
Wilhelm Schwerdt
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SMS Siemag AG
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SMS Demag AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B13/00Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14Metal-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B27/00Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02Shape or construction of rolls
    • B21B27/03Sleeved rolls
    • B21B27/05Sleeved rolls with deflectable sleeves

Definitions

  • the invention relates to a rolling mill with work rolls and multi-part backup rolls, consisting of a basic body with several on it in its longitudinal direction roller bearings arranged side by side, the one with the outer rings of the roller bearings support encircling sleeve rotatably, with its inner surface on all sides
  • the outer surfaces of the outer rings of the roller bearings abut and the outer surface of the Rolls of the backup roll forms, with 3 bearings on the length of the base body are provided, of which the middle roller bearing is designed as a tapered roller bearing.
  • Such a rolling mill is known from US 19 10 158.
  • roller crossing i.e. when tilting the rollers of a pair of rollers to each other, special measures are required to achieve a given swivel angle to achieve uniform angular velocities. So there are no normal universal joint driveshafts, but toothed spindles are required to drive the rollers. The Swiveling also generates very high axial forces, up to 10% of the radial rolling force can make out. Roll crossing also leads to problems with the Rolling stock guidance because the rolling stock is twisted in the roll stand.
  • the sleeve rolls relative to the support roller bearing between the work roll and the outer bearing rings facing the work roll from. On the side facing away from the work roll, the sleeve runs freely without contact with the To store.
  • the bending line of the work roll can be influenced by turning the roll shaft, because the effective eccentricity between the backup roll and work roll is changed. On in this way it is possible to act on the profile of the roll gap in the roll stand.
  • a disadvantage of the known solution is that for the flexing movement of the outer sleeve the backup roll between the bearings of the backup roll and the work roll the stability of the There is no movement at high rolling loads.
  • On the other hand is due to the necessary Game between the sleeve and the roller bearings of the backup roller an insert as a lower backup roller in a hot rolling stand is difficult or impossible to implement because it is effective Protection of the storage against water and dirt can hardly be realized permanently.
  • the flexing movements between the sleeve and the bearing lead only partially through this The bearing outer rings cause significant signs of wear, which the Adjustability of the rolling mill and thus the quality of the rolled product negatively influence.
  • the sleeve of the back-up roller is so with eccentric adjustment without rolling load is deformed so that it acquires a convex or neutral basic shape.
  • the spherical roller bearings are tilted so that their service life is further reduced becomes.
  • the object of the present invention is based on known eccentric adjustable back-up rolls, the construction of which should be improved in such a way that at reduced Manufacturing costs a much longer life of the subject to wear Components are expected and that due to the simplified construction, the assembly and Disassembly of the sleeve on the rolling bearing is facilitated.
  • the essence of the present invention is based on an eccentric adjustment of the middle area of the support roller, instead of only the two edge areas the eccentric roller to bend in an eccentric manner and thereby to simple cylindrical roller bearings to access, which are paired with eccentric bushings that can be rotated on the base body become.
  • Cylindrical roller bearings have clear advantages over spherical roller bearings. Spherical roller bearings are less precise in production, so that they are evenly worn known eccentric backup rolls with a variety of spherical roller bearings not easy can be reached. In cylindrical roller bearings there is an axial displacement of the rolling elements on the Wrestling allowed in the order of 1%, which is a cheaper one Setting as this is possible with spherical roller bearings.
  • Cylindrical roller bearings are cheaper to manufacture and therefore cheaper. According to the last feature of claim 1 it is provided that in the load range Basic body between this and the eccentric bushing each the inclination of the Cylindrical roller bearing enabling self-adjustable tilting segment is provided. With This tilting segment is a particularly favorable load distribution on the cylindrical roller bearings and thus achieved a significant increase in service life. With the cylindrical roller bearing with The inner bearing rings are deformed in the tilting segment, which is cheaper than the inclined position the outer rings of the spherical roller bearing, which leads to twisting of the raceway.
  • the tilting segment becomes deformed by the rolling bearing rings causes; the force can surely exceed with different deflection of the tilting segment this be passed into the base body.
  • the ring In the transition from the tilting segment to the normal one the ring is twisted somewhat; but since that in happens in an area without roller load where only a few rollers carry while the others are unencumbered, this is harmless.
  • Eccentric bushing is assigned a stepless rotary actuator and both rotary actuators are synchronizable. In this way, the adjustment is infinitely variable
  • the sleeve can be raised in the edge area.
  • the base body is fixed non-rotatably in the scaffold stand. Elaborate rotary drives for the The basic body is not required in this solution because the adjustment of the support roller or the sleeve compared to the base body via the separate swivel drives of the eccentric bushes and no longer takes place via the rotation of the base body as in the prior art. As a result, the base body always remains in a neutral position, the rolling force becomes always transferred to the scaffold in the same position via the pedestals.
  • the tilting segment is spherical in the longitudinal direction of the base body trained and consists of a plain bearing material that is hydrostatically relieved.
  • the hydrostatic relief ensures that the high rolling forces are adjustable Do not block the roller even under load.
  • the Eccentric bushes are slidably rotatably on eccentric surfaces of the base body, whose eccentricity in a neutral rotational position of the eccentric bushes is an alignment of the Eccentric axes with the basic body longitudinal axis allows. In this way, one Neutral position of the eccentric bush created, with no offset between the axes takes place. This position is used to open the sleeve. Twisting the Eccentric bushes cause an offset of approx. 2 mm, in this position rolling is carried out.
  • the base body is provided in its flatten both edge areas. This is to ensure that the Eccentric bushes and the rolling bearing rings expand when the casing is tilted can.
  • the flattened areas can be milled locally on the circumference take place laterally on the base body in planes parallel to the rolling plane.
  • a Another feature of the invention proposed that the tilting segments opposite area of the base body locally on the circumference in the longitudinal direction is tapered roof-shaped, the bevels from the rolling bearing inner ring center run on both sides.
  • the eccentric and tilt the rolling bearings this solution is on the side facing away from the load area easier than another tilting segment and does not weaken the cross section of the on bend loaded body.
  • this contact area can be relieved hydrostatically. This will make one Ease of movement of the adjustment mechanism is achieved, which is an adjustment and adjustment of the sleeves enabled under load.
  • An essential advantage of the present invention is its simplicity. she allows the problem-free use of standard roller bearings for those that encompass the roller bearings Sleeve, whereby the disadvantages described are avoided and an inexpensive Solution is created.
  • the basic body with the eccentric bushes and their Actuators are suitable for long-term use, only the sleeve as a wearing part must be replaced after grinding.
  • the backup roller according to the invention is shown in longitudinal section. It consists in essentially from the base body 1, on which the sleeve 2 about the longitudinal axis 3 of the Base body is rotatably mounted. For this purpose, between the base body 1 and the sleeve 2 three roller bearings arranged, of which the middle roller bearing as a double tapered roller bearing 4 and the two roller bearings arranged on both sides of it as cylindrical roller bearings 5 are trained. While the tapered roller bearing 4 sits directly on the base body, is between the inner rings 6 of the cylindrical roller bearing 5 and the circumference of the Base body 1 in the edge regions each have an eccentric bushing 7 with respect to the Base body 1 is rotatably arranged.
  • the eccentric bushes 7 are independent rotatably driven from each other but synchronized, for which purpose a spur gear 8 with (not shown) drive is provided with an externally toothed pinion in the Internal teeth of a rotating sleeve 9 rotatably mounted on the ends of the base body engages, which engages positively in the end face in each of the two eccentric bushings 7 and this twisted.
  • the base body is non-rotatable via a circumferentially toothed pin 10 set; the pin 10 is supported on the chock 11, in which the base body 1 in Scaffold frame 11 is added.
  • each cylindrical roller bearing 5 assigned tilting segment 12 is inserted.
  • the tilting segment is in the longitudinal direction of the Base body 1 is crowned and carries on its facing away from the bale 13, in essentially the side corresponding to the outer circumference of the base body Eccentric bushes 7, on which the inner rings 6 of the cylindrical roller bearing 5 are supported.
  • Eccentric bushes 7 When the eccentric bushes 7 are turned, a bending force is exerted on the sleeve 2 of the support roller applied, which leads to a convex or concave deformation of the sleeve 2. So that Cylindrical roller bearings are not damaged by these eccentric bending forces, allows each tilting segment 12 a sufficient inclination of the cylindrical roller bearings 5, by the tilting segments slidably adjust over their bales 13.
  • the inner ring region of the cylindrical roller bearing 5 facing away from the load side does not close exposed to great constraints are those opposite the tilting segments 12
  • the bevels are flat executed and run only over a peripheral portion of the base body 1 (see FIG. 2).

Abstract

A rolling mill with working rolls and with multipart support rolls. The rolling mill includes of a basic body with a plurality of rolling bearings which are arranged next to one another on the basic body in its longitudinal direction. The outer rings of the bearing rotatably support a sleeve which surrounds the rolling bearings and bears with its inner surface, all-round, on the outer surfaces of the outer rings of the rolling bearings and the outer surface of which forms the roll barrel of the support roll. Three rolling bearings, of which the middle rolling bearing is designed as a tapered rolling bearing, are provided over the length of the basic body. In this case the two outer rolling bearings are designed as cylindrical roller bearings and an eccentric bush motively rotatable about the longitudinal axis of the basic body is arranged between the two cylindrical roller bearings and the basic body.

Description

Die Erfindung betrifft ein Walzwerk mit Arbeitswalzen und mehrteiligen Stützwalzen, bestehend aus einem Grundkörper mit mehreren darauf in dessen Längsrichtung nebeneinander angeordneten Wälzlagern, die mit ihren Außenringen eine die Wälzlager umgreifende Hülse drehbar abstützen, die mit ihrer Innenoberfläche allseitig an den Außenoberflächen der Außenringe der Wälzlager anliegt und deren Außenoberfläche den Walzballen der Stützwalze bildet, wobei auf der Länge des Grundkörpers 3 Wälzlager vorgesehen sind, von denen das mittlere Wälzlager als Kegelrollenlager ausgebildet ist.The invention relates to a rolling mill with work rolls and multi-part backup rolls, consisting of a basic body with several on it in its longitudinal direction roller bearings arranged side by side, the one with the outer rings of the roller bearings support encircling sleeve rotatably, with its inner surface on all sides The outer surfaces of the outer rings of the roller bearings abut and the outer surface of the Rolls of the backup roll forms, with 3 bearings on the length of the base body are provided, of which the middle roller bearing is designed as a tapered roller bearing.

Ein derartiges Walzwerk ist aus der US 19 10 158 bekannt.Such a rolling mill is known from US 19 10 158.

In den heutigen Warmbandstraßen spielt die Profil- und Planheitssteuerung eine wichtige Rolle. Dabei ist die negative und positive Arbeitswalzenbiegung das "klassische" Stellglied, das auch unter Walzlast eine Veränderung erlaubt. Da man aber unter Berücksichtigung der unterschiedlichsten Parameter, wie Breite, Dicke, Querschnittsprofil, Werkstoff, Walztemperatur, Walzgeschwindigkeit, Walzentemperatur und Stahlqualitäten arbeiten muss, ist es bei heute üblichen kleinen Losgrößen und universell einsetzbaren Walzwerken wichtig, über einen großen Stellbereich zu verfügt.Profile and flatness control play an important role in today's hot strip mills Role. The negative and positive work roll bending is the "classic" actuator, that allows a change even under rolling load. However, considering the various parameters, such as width, thickness, cross-sectional profile, material, Roll temperature, roll speed, roll temperature and steel qualities work it is, with today's small batch sizes and universally applicable rolling mills important to have a large adjustment range.

In den letzten Jahren sind bei neuen Straßen verstärkt weitere Stellglieder zum Einsatz gekommen, von denen die als CVC-Walzenschliff bekannte Ballenkontur und das Walzencrossing, das Kreuzen der Arbeits und/oder Stützwalzen, die bekanntesten sind. Beide Lösungen sind nicht optimal, weil bei beiden Verfahren die Walzen nicht unter Last verstellt werden können. Das Konturieren der Walzen mit aufwendigen CVC-Schliffen muss darüber hinaus äußerst präzise erfolgen, um die gewünschte Geometrie zu erreichen. Häufig wird das Walzgut unter bestimmten Bedingungen am Rand und in der Mitte unterschiedlich verformt. In einer kontinuierlichen Straße ist eine Walze mit definierter Flaschenkontur nötig, die bei jedem Gerüst unterschiedlich ist. In recent years, additional actuators have been increasingly used on new roads come, of which the bale contour known as CVC roller grinding and that Roll crossing, the crossing of the work and / or backup rolls, which are the best known. Both solutions are not optimal, because in both processes the rollers are not under load can be adjusted. Contouring the rollers with complex CVC cuts must be done Be extremely precise to achieve the desired geometry. Frequently the rolling stock is different under certain conditions at the edge and in the middle deformed. A roller with a defined bottle contour is required in a continuous line, which is different for each scaffold.

Beim Walzencrossing, d.h. beim Schrägstellen der Walzen eines Walzenpaares zueinander, sind besondere Maßnahmen erforderlich, um bei gegebenem Schwenkungswinkel gleichförmige Winkelgeschwindigkeiten zu erreichen. So sind keine normalen Zapfenkreuz-Gelenkwellen, sondern Zahnspindeln für den Antrieb der Walzen notwendig. Das Schwenken erzeugt darüber hinaus sehr hohe Axialkräfte, die bis 10% der Radial-Walzkraft ausmachen können. Außerdem führt das Walzencrossing zu Problemen bei der Walzgutführung, weil sich das Walzgut im Walzgerüst verdreht.With roller crossing, i.e. when tilting the rollers of a pair of rollers to each other, special measures are required to achieve a given swivel angle to achieve uniform angular velocities. So there are no normal universal joint driveshafts, but toothed spindles are required to drive the rollers. The Swiveling also generates very high axial forces, up to 10% of the radial rolling force can make out. Roll crossing also leads to problems with the Rolling stock guidance because the rolling stock is twisted in the roll stand.

Bei der Suche nach einem weiteren Stellglied, das die beschriebenen Nachteile vermeidet und das einfach ist, wurden Stützwalzen mit Exzentern entwickelt, die mit einer profileinstellbaren Hülse als zusätzliches Stellglied für die Profilsteuerung benutzt werden. So beschreibt die europäische Patentschrift 0 584 642 ein Walzwerk der gattungsgemäßen Art, bei dem der dort als Walzenwelle bezeichnete Rundkörper in fünf oder mehr Sektionen geteilt ist, die exzentrisch zu der die Walzenwelle durchdringenden Zentralachse angeordnet sind. Auf den Sektionen der Walzenwelle sind infolge deren Versatz exzentrisch Stützlager in Form von Kegelrollenlagern angeordnet, an die die zylindrische Hülse andrückbar ist, die die Wälzlager lose mit Spiel umgreift. Die zylindrischen Abschnitte der dort vorgeschlagenen Sektionen der Walzenwelle haben unterschiedliche Durchmesser, die jedoch symmetrisch zur Mitte der Stützwalze gleichmäßig abgestuft sind.When looking for another actuator that avoids the disadvantages described and that is simple, backup rollers with eccentrics were developed, which with a profile-adjustable sleeve can be used as an additional actuator for profile control. So European Patent 0 584 642 describes a rolling mill of the generic type, in which the round body referred to there as the roller shaft in five or more sections is divided, which is arranged eccentrically to the central axis penetrating the roller shaft are. Due to their offset, support bearings in are eccentrically on the sections of the roller shaft Form of tapered roller bearings arranged to which the cylindrical sleeve is pressed, which the Rolling bearing loosely engages with play. The cylindrical sections of those proposed there Sections of the roller shaft have different diameters, but they are symmetrical are stepped evenly towards the center of the backup roller.

Während des Walzvorganges wälzt die Hülse gegenüber der Lagerung der Stützwalze zwischen der Arbeitswalze und den der Arbeitswalze zugewandten Wälzlageraußenringen ab. Auf der der Arbeitswalze abgewandten Seite läuft die Hülse frei ohne Kontakt zu den Lagern. Durch Drehen der Walzenwelle läßt sich die Biegelinie der Arbeitswalze beeinflußen, weil die wirksame Exzentrizität zwischen Stützwalze und Arbeitswalze verändert wird. Auf diese Weise kann auf das Profil des Walzspaltes im Walzgerüst eingewirkt werden.During the rolling process, the sleeve rolls relative to the support roller bearing between the work roll and the outer bearing rings facing the work roll from. On the side facing away from the work roll, the sleeve runs freely without contact with the To store. The bending line of the work roll can be influenced by turning the roll shaft, because the effective eccentricity between the backup roll and work roll is changed. On in this way it is possible to act on the profile of the roll gap in the roll stand.

Nachteilig bei der bekannten Lösung ist es, daß für die Walkbewegung der äußeren Hülse der Stützwalze zwischen den Lagern der Stützwalze und der Arbeitswalze die Stabilität der Bewegung bei hohen Walzlasten nicht gegeben ist. Zum anderen ist durch das erforderliche Spiel zwischen Hülse und den Wälzlagern der Stützwalze ein Einsatz als untere Stützwalze in einem Warmwalzgerüst nicht oder nur sehr schwierig zu realisieren, da ein effektiver Schutz der Lagerung gegenüber Wasser und Schmutz kaum dauerhaft zu realisieren ist. Zudem führen die Walkbewegungen zwischen Hülse und Lager durch das nur teilweise Anliegen der Wälzlageraußenringe zu deutlichen Verschleißerscheinungen, die die Einstellbarkeit des Walzwerkes und damit die Qualität des Walzproduktes negativ beeinflußen. Aus den angeführten Gründen ist bisher auch kein praktischer Anwendungsfall einer gattungsgemäßen Stützwalze bekannt.A disadvantage of the known solution is that for the flexing movement of the outer sleeve the backup roll between the bearings of the backup roll and the work roll the stability of the There is no movement at high rolling loads. On the other hand is due to the necessary Game between the sleeve and the roller bearings of the backup roller an insert as a lower backup roller in a hot rolling stand is difficult or impossible to implement because it is effective Protection of the storage against water and dirt can hardly be realized permanently. In addition, the flexing movements between the sleeve and the bearing lead only partially through this The bearing outer rings cause significant signs of wear, which the Adjustability of the rolling mill and thus the quality of the rolled product negatively influence. For the reasons given, it has not yet been a practical application a generic backup roller known.

Ein anderes Probleme bekannter exzentrischer Stützwalzen ist die Lagerung zwischen dem Grundkörper und der Hülse; denn die Lager müssen die komplette Walzkraft übertragen. Die vorgesehenen Pendelrollenlagerlager sind extrem hoch belastet und es ist schwer die geforderte Lebensdauer von ca. 6000 Stunden zu erreichen. Durch die exzentrische Verstellung zwischen Hülse und Grundkörper wird die Lebensdauer der Lager zusätzlich verringert.Another problem with known eccentric back-up rolls is the storage between them Base body and the sleeve; because the bearings have to transmit the complete rolling force. The The provided spherical roller bearing are extremely loaded and it is difficult to achieve the required service life of approx. 6000 hours. Because of the eccentric Adjustment between the sleeve and the base body increases the service life of the bearings reduced.

Hinzu kommt, dass bei Exzenterverstellung ohne Walzlast die Hülse der Stützwalze so verformt wird, dass sie eine konvexe oder neutrale Grundform erhält. In der konvexen Stellung werden die Pendelrollenlager verkippt, so daß deren Lebensdauer weiter vermindert wird.In addition, the sleeve of the back-up roller is so with eccentric adjustment without rolling load is deformed so that it acquires a convex or neutral basic shape. In the convex Position, the spherical roller bearings are tilted so that their service life is further reduced becomes.

Schließlich ist bei den bekannten exzentrischen Stützwalzenausbildungen die Montage der Hülse extrem schwierig, weil die Hülse über die vorstehenden Teile der exzentrischen Lagerung geschoben werden muss.Finally, in the known eccentric back-up roller designs, the assembly of the Sleeve extremely difficult because the sleeve over the protruding parts of the eccentric Storage must be pushed.

Aufgabe der vorliegenden Erfindung ist es, ausgehend von bekannten exzentrisch verstellbaren Stützwalzen, deren Konstruktion so zu verbessem, dass bei verminderten Herstellkosten eine wesentliche höhere Lebensdauer der dem Verschleiß unterliegenden Bauteile zu erwarten ist und daß infolge der vereinfachten Konstruktion das Montieren und Demontieren der Hülse auf die Wälzlager erleichtert wird.The object of the present invention is based on known eccentric adjustable back-up rolls, the construction of which should be improved in such a way that at reduced Manufacturing costs a much longer life of the subject to wear Components are expected and that due to the simplified construction, the assembly and Disassembly of the sleeve on the rolling bearing is facilitated.

Gelöst wird diese Aufgabe mit den Merkmalen des Patentanspruchs 1.This object is achieved with the features of patent claim 1.

Der Kern der vorliegenden Erfindung besteht darin, auf eine Exzenterverstellung des mittleren Bereichs der Stützwalze zu verzichten, statt dessen nur die beiden Randbereiche der Stützwalze exzenterverstellt zu verbiegen und dabei auf einfache Zylinderrollenlager zurückzugreifen, die mit auf dem Grundkörper verdrehbaren Exzenterbüchsen gepaart werden. Zylinderrollenlager weisen deutliche Vorteile gegenüber den Pendelrollenlagern auf. So sind Pendelrollenlager in der Fertigung ungenauer, so daß ein gleichmäßiges Tragen bei bekannten exzentrischen Stützwalzen mit einer Vielzahl von Pendelrollenlagem nicht leicht zu erreichen ist. Bei Zylinderrollenlagem ist eine Axialverschiebung der Wälzkörper auf den Ringen während eines Umlaufs in der Größenordnung von 1% erlaubt, was eine günstigere Einstellung als dies bei Pendelrollenlagem möglich ist erlaubt. Außerdem sind Zylinderrollenlager günstiger in der Fertigung und damit billiger. Nach dem letzten Merkmal des Patentanspruchs 1 ist vorgesehen, daß im Lastbereich des Grundkörpers zwischen diesem und der Exzenterbüchse je ein die Schiefstellung des Zylinderrollenlagers ermöglichendes selbsteinstellbares Kippsegment vorgesehen ist. Mit diesem Kippsegment wird eine besonders günstige Lastverteilung auf die Zylinderrollenlager und damit eine wesentliche Lebensdauererhöhung erreicht. Bei dem Zylinderrollenlager mit Kippsegment werden die Lagerinnenringe verformt, das ist günstiger als die Schrägstellung der Außenringe beim Pendelrollenlager, was zur Verwindung der Laufbahn führt. Durch das Kippsegment wird im Lastbereich der Stützwalze eine Verformung der Wälzlagerringe bewirkt; die Kraft kann bei unterschiedlicher Auslenkung des Kippsegments sicher über dieses in den Grundkörper geleitet werden. Im Übergang von Kippsegment zu der normalen unverformbar abgestützten Laufbahn wird der Ring zwar etwas verdreht; da das aber in einem Bereich ohne Walzenlast passiert, wo nur wenige Rollen tragen, während die anderen unbelastet sind, ist dies unschädlich.The essence of the present invention is based on an eccentric adjustment of the middle area of the support roller, instead of only the two edge areas the eccentric roller to bend in an eccentric manner and thereby to simple cylindrical roller bearings to access, which are paired with eccentric bushings that can be rotated on the base body become. Cylindrical roller bearings have clear advantages over spherical roller bearings. Spherical roller bearings are less precise in production, so that they are evenly worn known eccentric backup rolls with a variety of spherical roller bearings not easy can be reached. In cylindrical roller bearings there is an axial displacement of the rolling elements on the Wrestling allowed in the order of 1%, which is a cheaper one Setting as this is possible with spherical roller bearings. Also are Cylindrical roller bearings are cheaper to manufacture and therefore cheaper. According to the last feature of claim 1 it is provided that in the load range Basic body between this and the eccentric bushing each the inclination of the Cylindrical roller bearing enabling self-adjustable tilting segment is provided. With This tilting segment is a particularly favorable load distribution on the cylindrical roller bearings and thus achieved a significant increase in service life. With the cylindrical roller bearing with The inner bearing rings are deformed in the tilting segment, which is cheaper than the inclined position the outer rings of the spherical roller bearing, which leads to twisting of the raceway. By the In the load area of the back-up roll, the tilting segment becomes deformed by the rolling bearing rings causes; the force can surely exceed with different deflection of the tilting segment this be passed into the base body. In the transition from the tilting segment to the normal one the ring is twisted somewhat; but since that in happens in an area without roller load where only a few rollers carry while the others are unencumbered, this is harmless.

In einer Ausgestaltung des erfindungsgemäßen Vorschlags ist vorgesehen, daß jeder Exzenterbüchse ein stufenloser Schwenkantrieb zugeordnet ist und beide Schwenkantriebe synchronisierbar sind. Auf diese Weise ist eine stufenlose Verstellung der Hülsenüberhöhung im Randbereich möglich.In one embodiment of the proposal according to the invention it is provided that everyone Eccentric bushing is assigned a stepless rotary actuator and both rotary actuators are synchronizable. In this way, the adjustment is infinitely variable The sleeve can be raised in the edge area.

Nach einem weiteren Vorschlag der Erfindung ist vorgesehen, dass der Grundkörper unverdrehbar in dem Gerüstständer festgelegt ist. Aufwendige Verdrehantriebe für den Grundkörper entfallen bei dieser Lösung, weil die Verstellung der Stützwalze bzw. der Hülse gegenüber dem Grundkörper über die getrennten Schwenkantriebe der Exzenterbüchsen und nicht mehr über die Verdrehung des Grundkörpers wie beim Stand der Technik erfolgt. Dadurch bleibt der Grundkörper immer in einer neutralen Stellung stehen, die Walzkraft wird immer in ein und derselben Stellung über die Lagerböcke auf das Gerüst übertragen. According to a further proposal of the invention, it is provided that the base body is fixed non-rotatably in the scaffold stand. Elaborate rotary drives for the The basic body is not required in this solution because the adjustment of the support roller or the sleeve compared to the base body via the separate swivel drives of the eccentric bushes and no longer takes place via the rotation of the base body as in the prior art. As a result, the base body always remains in a neutral position, the rolling force becomes always transferred to the scaffold in the same position via the pedestals.

In einer Ausgestaltung ist das Kippsegment in Längsrichtung des Grundkörpers ballig ausgebildet und besteht aus einem Gleitlagerwerkstoff, der hydrostatisch entlastbar ist. Die hydrostatische Entlastung stellt sicher, dass die hohen Walzkräfte die Einstellbarkeit der Walze auch unter Last nicht blockieren.In one embodiment, the tilting segment is spherical in the longitudinal direction of the base body trained and consists of a plain bearing material that is hydrostatically relieved. The hydrostatic relief ensures that the high rolling forces are adjustable Do not block the roller even under load.

In einer weiteren günstigen Ausgestaltung der Erfindung ist vorgesehen, dass die Exzenterbüchsen auf Exzenterflächen des Grundkörpers gleitend drehbar geführt sind, deren Exzentrizität in einer neutralen Verdrehstellung der Exzenterbüchsen ein Fluchten der Exzenterachsen mit der Grundkörper Längsachse ermöglicht. Auf diese Weise wird eine Neutralstellung der Exzenterbüchse geschaffen, bei der kein Versatz zwischen den Achsen stattfindet. Diese Stellung wird zum Aufziehen der Hülse benutzt. Das Verdrehen der Exzenterbüchsen bewirkt einen Versatz von ca. 2 mm, in dieser Stellung wird gewalzt.In a further advantageous embodiment of the invention it is provided that the Eccentric bushes are slidably rotatably on eccentric surfaces of the base body, whose eccentricity in a neutral rotational position of the eccentric bushes is an alignment of the Eccentric axes with the basic body longitudinal axis allows. In this way, one Neutral position of the eccentric bush created, with no offset between the axes takes place. This position is used to open the sleeve. Twisting the Eccentric bushes cause an offset of approx. 2 mm, in this position rolling is carried out.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, den Grundkörper in seinen beiden Randbereichen abzuflachen. Dadurch soll sichergestellt werden, daß die Exzenterbüchsen und die Wälzlagerringe sich bei Schiefstellung des Mantels dehnen können. Die Abflachungen können durch Abfräsungen des Grundkörpers örtlich am Umfang seitlich am Grundkörper in zur Walzebene parallelen Ebenen erfolgen.According to a further feature of the invention, the base body is provided in its flatten both edge areas. This is to ensure that the Eccentric bushes and the rolling bearing rings expand when the casing is tilted can. The flattened areas can be milled locally on the circumference take place laterally on the base body in planes parallel to the rolling plane.

Um die Kippbarkeit der Wälzlager im Nicht-Lastbereich zu ermöglichen, wird nach einem weiteren Merkmal der Erfindung vorgeschlagen, daß der den Kippsegmenten gegenüberliegende Bereich des Grundkörpers örtlich am Umfang in Längsrichtung dachförmig abgeschrägt ist, wobei die Abschrägungen von der Wälzlager-Innenringmitte nach beiden Seiten verlaufen. Durch diese Maßnahme können sich die Exzenterbüchse und die Wälzlager schiefstellen; auf der dem Lastbereich abgewandten Seite ist diese Lösung einfacher als ein weiteres Kippsegment und schwächt nicht den Querschnitt des auf Biegung belasteten Grundkörpers.To enable the rolling bearings to tilt in the no-load range, a Another feature of the invention proposed that the tilting segments opposite area of the base body locally on the circumference in the longitudinal direction is tapered roof-shaped, the bevels from the rolling bearing inner ring center run on both sides. By this measure, the eccentric and tilt the rolling bearings; this solution is on the side facing away from the load area easier than another tilting segment and does not weaken the cross section of the on bend loaded body.

Da zwischen den Kontaktflächen der Exzenterbüchsen und den Exzenterflächen des Grundkörpers beim Anstellen, d.h. Verdrehen der Exzenterbüchsen eine Relativbewegung zwischen hochbelasteten Flächen stattfindet, soll nach einem weiteren Merkmal der Erfindung dieser Kontaktbereich hydrostatisch entlastbar sein. Dadurch wird eine Leichtgängigkeit der Verstellmechanik erreicht, die ein Anstellen und Verstellen der Hülsen unter Last ermöglicht.Since between the contact surfaces of the eccentric bushes and the eccentric surfaces of the Body when starting, i.e. Twisting the eccentric bushes a relative movement According to another characteristic of the Invention this contact area can be relieved hydrostatically. This will make one Ease of movement of the adjustment mechanism is achieved, which is an adjustment and adjustment of the sleeves enabled under load.

Ein wesentlicher Vorteil der vorliegenden Erfindung besteht in seiner Einfachheit. Sie erlaubt den problemfreien Einsatz von Standard-Wälzlagern für die die Wälzlager umgreifende Hülse, wodurch die beschriebenen Nachteile vermieden werden und eine kostengünstige Lösung geschaffen wird. Der Grundkörper mit den Exzenterbüchsen und deren Verstellantrieben ist für langzeitigen Gebrauch geeignet, lediglich die Hülse als Verschleißteil muss nach dem Abschleifen erneuert werden.An essential advantage of the present invention is its simplicity. she allows the problem-free use of standard roller bearings for those that encompass the roller bearings Sleeve, whereby the disadvantages described are avoided and an inexpensive Solution is created. The basic body with the eccentric bushes and their Actuators are suitable for long-term use, only the sleeve as a wearing part must be replaced after grinding.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. Es zeigt:

Figur 1
einen Längsschnitt durch die erfindungsgemäße Stützwalze,
Figur 2
einen Querschnitt durch die Stützwalze nach Figur 1 im Bereich des Kippsegmentes in der Einbaustellung der Hülse und
Figur 3
den Querschnitt nach Fig.2 mit extremer Exzenterstellung.
An embodiment of the invention is shown in the drawing and is described below. It shows:
Figure 1
a longitudinal section through the backup roller according to the invention,
Figure 2
a cross section through the support roller according to Figure 1 in the region of the tilting segment in the installed position of the sleeve and
Figure 3
the cross section of Figure 2 with extreme eccentric position.

In Figur 1 ist die erfindungsgemäße Stützwalze im Längsschnitt dargestellt. Sie besteht im wesentlichen aus dem Grundkörper 1, auf dem die Hülse 2 um die Längsachse 3 des Grundkörpers drehbar gelagert ist. Dazu sind zwischen dem Grundkörper 1 und der Hülse 2 drei Wälzlager angeordnet, von denen das mittlere Wälzlager als doppeltes Kegelrollenlager 4 und die beiden beidseitig von diesem angeordneten Wälzlager als Zylinderrollenlager 5 ausgebildet sind. Während das Kegelrollenlager 4 unmittelbar auf dem Grundkörper aufsitzt, ist zwischen den Innenringen 6 der Zylinderrollenlager 5 und den Umfängen des Grundkörpers 1 in dessen Randbereichen jeweils eine Exzenterbüchse 7 gegenüber dem Grundkörper 1 verdrehbar angeordnet. Die Exzenterbüchsen 7 sind unabhängig voneinander aber synchronisierbar drehangetrieben, wozu je ein Stimradgetriebe 8 mit (nicht dargestelltem) Antrieb vorgesehen ist, das mit einem außen verzahnten Ritzel in die Innenverzahnung jeweils einer auf den Grundkörperenden drehbar gelagerten Drehhülse 9 eingreift, die stimseitig formschlüssig in jede der beiden Exzenterbüchsen 7 eingreift und diese verdreht. Der Grundkörper ist über einen umfangsverzahnten Zapfen 10 unverdrehbar festgelegt; der Zapfen 10 stützt sich am Einbaustück 11 ab, in dem der Grundkörper 1 im Gerüstrahmenn 11 aufgenommen wird.In Figure 1, the backup roller according to the invention is shown in longitudinal section. It consists in essentially from the base body 1, on which the sleeve 2 about the longitudinal axis 3 of the Base body is rotatably mounted. For this purpose, between the base body 1 and the sleeve 2 three roller bearings arranged, of which the middle roller bearing as a double tapered roller bearing 4 and the two roller bearings arranged on both sides of it as cylindrical roller bearings 5 are trained. While the tapered roller bearing 4 sits directly on the base body, is between the inner rings 6 of the cylindrical roller bearing 5 and the circumference of the Base body 1 in the edge regions each have an eccentric bushing 7 with respect to the Base body 1 is rotatably arranged. The eccentric bushes 7 are independent rotatably driven from each other but synchronized, for which purpose a spur gear 8 with (not shown) drive is provided with an externally toothed pinion in the Internal teeth of a rotating sleeve 9 rotatably mounted on the ends of the base body engages, which engages positively in the end face in each of the two eccentric bushings 7 and this twisted. The base body is non-rotatable via a circumferentially toothed pin 10 set; the pin 10 is supported on the chock 11, in which the base body 1 in Scaffold frame 11 is added.

Auf der dem Walzgut zugewandten Seite der Stützwalze ist beidseitig des Kegelrollenlagers 4 in den Grundkörper 1 eine Ausnehmung eingefräst, in die ein jedem Zylinderrollenlager 5 zugeordnetes Kippsegment 12 eingesetzt ist. Das Kippsegment ist in Längsrichtung des Grundkörpers 1 ballig ausgebildet und trägt auf seiner dem Ballen 13 abgewandten, im wesentlichen dem Außenumfang des Grundkörpers entsprechenden Seite die Exzenterbüchsen 7, auf denen die Innenringe 6 des Zylinderrollenlagers 5 abgestützt sind. Beim Verdrehen der Exzenterbüchsen 7 wird auf die Hülse 2 der Stützwalze eine Biegekraft aufgebracht, die zu einer konvexen oder konkaven Verformung der Hülse 2 führt. Damit die Zylinderrollenlager durch diese exzentrisch wirkenden Biegekräfte nicht beschädigt werden, ermöglicht jedes Kippsegment 12 eine ausreichende Schrägstellung der Zylinderrollenlager 5, indem sich die Kippsegmente über ihre Ballen 13 gleitend schräg einstellen.On the side of the support roller facing the rolling stock is the tapered roller bearing on both sides 4, a recess is milled into the base body 1, into which each cylindrical roller bearing 5 assigned tilting segment 12 is inserted. The tilting segment is in the longitudinal direction of the Base body 1 is crowned and carries on its facing away from the bale 13, in essentially the side corresponding to the outer circumference of the base body Eccentric bushes 7, on which the inner rings 6 of the cylindrical roller bearing 5 are supported. When the eccentric bushes 7 are turned, a bending force is exerted on the sleeve 2 of the support roller applied, which leads to a convex or concave deformation of the sleeve 2. So that Cylindrical roller bearings are not damaged by these eccentric bending forces, allows each tilting segment 12 a sufficient inclination of the cylindrical roller bearings 5, by the tilting segments slidably adjust over their bales 13.

Damit der der Lastseite abgewandte Innenringbereich des Zylinderrollenlagers 5 nicht zu großen Zwängen ausgesetzt wird, sind die den Kippsegmenten 12 gegenüberliegenden Bereiche des Grundkörpers 1 örtlich am Umfang in Längsrichtung des Grundkörpers 1 dachförmig abgeschrägt, wobei die Abschrägungen, ausgehend von dem mittleren Bereich des Zylinderrollenlagers 5, nach beiden Seiten verlaufen. Die Abschrägungen sind eben ausgeführt und verlaufen nur über einen Umfangsabschnitt des Grundkörpers 1 (s. Figur 2).So that the inner ring region of the cylindrical roller bearing 5 facing away from the load side does not close exposed to great constraints are those opposite the tilting segments 12 Areas of the base body 1 locally on the circumference in the longitudinal direction of the base body 1 bevelled roof-shaped, the bevels starting from the central area of the cylindrical roller bearing 5, run on both sides. The bevels are flat executed and run only over a peripheral portion of the base body 1 (see FIG. 2).

In Figur 2 ist erkennbar, daß auch am Außenumfang des Grundkörpers 1 in dessen Seitenbereichen parallel zur Walzebene plane Abschrägungen vorgesehen sind, die mit 15 bezeichnet sind. Diese Abschrägungen ermöglichen eine geringe Dehnung der Exzenterbüchse 7 und des Innenringes 6 in Lastrichtung, die beim Schrägstellen der Hülse 2 gegenüber dem Grundkörper 1 auftreten kann. Da nach der Erfindung im Tragbereich der Exzenterbüchse 7 am Grundkörper 1 ebenfalls Exzenterflächen ausgebildet sind, deren Exzentrizität der der Exzenterbüchsen entspricht, kann durch entsprechendes Verdrehen der Exzenterbüchse 7 auf den mit 14 bezeichneten Exzenterflächen eine Neutralstellung eingestellt werden, in der die Hülse 2 keiner Biegung unterworfen wird und somit die Hülse in dieser Stellung montiert und demontiert werden kann. Diese Stellung ist in Figur 2 dargestellt.In Figure 2 it can be seen that also on the outer circumference of the base body 1 in the Side areas parallel to the rolling plane are provided with flat bevels, which are 15 are designated. These bevels allow a slight stretching of the Eccentric bushing 7 and the inner ring 6 in the load direction, which when the sleeve 2 is inclined can occur with respect to the base body 1. Since according to the invention in the supporting area Eccentric sleeve 7 are also formed on the base body 1, the eccentric surfaces Eccentricity that corresponds to the eccentric bushings can be turned by turning the Eccentric bushing 7 on the eccentric surfaces designated 14 a neutral position can be set in which the sleeve 2 is not subjected to any bending and thus the sleeve in this position can be assembled and disassembled. This position is in Figure 2 shown.

In Figur 3 ist die Exzenterbüchse 7 um 180° verdreht worden, so daß die volle Biegewirkung des Exzenters auf die Hülse 2 wirkt. In dieser Stellung weist die Stützwalze die größte einstellbare Balligkeit auf, die zwischen dieser Stellung und der Neutralstellung stufenlos veränderbar ist.In Figure 3, the eccentric bushing 7 has been rotated by 180 °, so that the full bending effect of the eccentric acts on the sleeve 2. In this position, the backup roller has the largest adjustable crowning, which is infinitely variable between this position and the neutral position is changeable.

Claims (8)

  1. Rolling mill with working rolls and multi-section backing rolls, consisting of a main body with several roll bearings arranged on it adjacent to one another in its longitudinal direction, which with their outer rings support and allow rotation of a sleeve (2) that surrounds the roll bearing, the said sleeve resting with its inside surface against the outside surfaces of the outer ring of the roll bearing on all sides and whose outside surface forms the roll barrel of the backing roll, such that along the length of the main body (1) three roll bearings are provided, the middle roll bearing of these being formed as a ball roll bearing (4),
    characterised in that
    the two outer roll bearings are formed as cylinder roll bearings (5) and between the two cylinder roll bearings (5) and the main body (1) there is arranged in each case an eccentric bush (7) that can be rotated by a motor about the longitudinal axis (3) of the main body, such that
    in the load area of the main body (1) between this and the eccentric bush (7) in each case a tilting segment (12) is provided, which is self-adjusting and which allows some angular deviation of the cylinder roll bearing (5).
  2. Rolling mill according to Claim 1,
    characterised in that
    each eccentric bush (7) is associated with a continuous tilt drive (spur gear 8) and the two tilt drives can be synchronised.
  3. Rolling mill according to Claims 1 and 2,
    characterised in that
    the main body (1) is fixed in the frame posts so that it cannot rotate.
  4. Rolling mill according to Claims 1 to 3,
    characterised in that
    the tilting segment (12) is formed with a camber in the longitudinal direction of the main body (1) and consists of a slide bearing material which can be unloaded hydrostatically.
  5. Rolling mill according to Claims 1 to 4,
    characterised in that
    the eccentric bushes (7) are guided and slide on eccentric surfaces (14) of the main body (1), whose eccentricity makes it possible in a neutral rotation position of the eccentric bushes (7) for the eccentric axis to be aligned with the longitudinal axis (3) of the main body.
  6. Rolling mill according to Claims 1 to 5,
    characterised in that
    in its two edge areas the main body (1) has chamfers (15).
  7. Rolling mill according to Claims 1 to 6,
    characterised in that
    the area of the main body (1) opposite the tilting segments (12) is locally cambered at the circumference in the longitudinal direction, such that the cambers (13) extend from the middle of the inside ring of the roll bearing towards both sides.
  8. Rolling mill according to Claims 1 to 7,
    characterised in that
    the contact area between the eccentric bushes (7) and the eccentric surfaces (14) of the main body (1) can be hydrostatically unloaded.
EP99916753A 1998-02-17 1999-02-17 Rolling mill with working rollers and multipart support rollers Expired - Lifetime EP1056553B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19807601A DE19807601C1 (en) 1998-02-17 1998-02-17 Rolling mill with work rolls and multi-part support rolls
DE19807601 1998-02-17
PCT/DE1999/000499 WO1999041025A1 (en) 1998-02-17 1999-02-17 Rolling mill with working rollers and multipart support rollers

Publications (2)

Publication Number Publication Date
EP1056553A1 EP1056553A1 (en) 2000-12-06
EP1056553B1 true EP1056553B1 (en) 2002-05-08

Family

ID=7858669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99916753A Expired - Lifetime EP1056553B1 (en) 1998-02-17 1999-02-17 Rolling mill with working rollers and multipart support rollers

Country Status (8)

Country Link
US (1) US6286355B1 (en)
EP (1) EP1056553B1 (en)
JP (1) JP4331893B2 (en)
AT (1) ATE217216T1 (en)
AU (1) AU3515099A (en)
DE (2) DE19807601C1 (en)
ES (1) ES2173735T3 (en)
WO (1) WO1999041025A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006467A1 (en) * 2005-07-07 2007-01-18 Sms Demag Ag Support roll for a rolling mill
DE102008027494A1 (en) 2007-06-14 2008-12-18 Sms Demag Ag Multi-part roller
CN101389416B (en) * 2005-07-07 2011-06-08 Sms西马格股份公司 Support roll for a rolling mill and its manufacture method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6826941B2 (en) 2000-12-29 2004-12-07 Ronald L. Plesh, Sr. Roller apparatus with improved height adjustability
US6532788B2 (en) * 2000-12-29 2003-03-18 Ronald L. Plesh, Sr. Roller apparatus
JP2013185673A (en) * 2012-03-09 2013-09-19 Ntn Corp Backup roll bearing device
DE102012206905A1 (en) * 2012-04-26 2013-10-31 Sms Siemag Ag supporting role

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US1910158A (en) * 1928-03-09 1933-05-23 Timken Roller Bearing Co Rolling mill
US3731357A (en) * 1970-06-15 1973-05-08 Yamauchi Rubber Ind Co Ltd Apparatus for adjusting the altitude of the chord of an expanding roll
JPS6418512A (en) * 1987-07-13 1989-01-23 Hitachi Ltd Reinforcing roll
JPH03248704A (en) * 1990-02-22 1991-11-06 Sumitomo Metal Ind Ltd Adjustable crown roll and rolling mill with it
JP2977379B2 (en) * 1992-07-24 1999-11-15 三菱重工業株式会社 Roller split type reinforcement roll
EP0584642B1 (en) * 1992-08-12 1997-03-12 Mitsubishi Jukogyo Kabushiki Kaisha Rolling mill
JP3021213B2 (en) * 1992-11-16 2000-03-15 三菱重工業株式会社 Sleeve reinforced roll mill
US5943895A (en) * 1997-04-24 1999-08-31 Sms Schloemann-Siemag Aktiengesellschaft Dynamic crown control back-up roll assembly
DE19735568C2 (en) * 1997-08-11 2000-07-20 Mannesmann Ag Rolling mill with work rolls and multi-part support rolls

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007006467A1 (en) * 2005-07-07 2007-01-18 Sms Demag Ag Support roll for a rolling mill
EA010897B1 (en) * 2005-07-07 2008-12-30 Смс Демаг Аг A support roll for a rolling mill
AU2006268933B2 (en) * 2005-07-07 2009-07-23 Sms Siemag Aktiengesellschaft Support roll for a rolling mill
CN101389416B (en) * 2005-07-07 2011-06-08 Sms西马格股份公司 Support roll for a rolling mill and its manufacture method
US8789401B2 (en) 2005-07-07 2014-07-29 Sms Siemag Aktiengesellschaft Method for producing a support roll for a rolling mill
DE102008027494A1 (en) 2007-06-14 2008-12-18 Sms Demag Ag Multi-part roller
US9381556B2 (en) 2007-06-14 2016-07-05 Sms Group Gmbh Multipart roller

Also Published As

Publication number Publication date
DE19807601C1 (en) 1999-08-12
US6286355B1 (en) 2001-09-11
EP1056553A1 (en) 2000-12-06
DE59901398D1 (en) 2002-06-13
ATE217216T1 (en) 2002-05-15
WO1999041025A1 (en) 1999-08-19
ES2173735T3 (en) 2002-10-16
JP2002502705A (en) 2002-01-29
JP4331893B2 (en) 2009-09-16
AU3515099A (en) 1999-08-30

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