EP1307302A1 - Roll stand comprising a crown-variable-control (cvc) roll pair - Google Patents

Roll stand comprising a crown-variable-control (cvc) roll pair

Info

Publication number
EP1307302A1
EP1307302A1 EP01960551A EP01960551A EP1307302A1 EP 1307302 A1 EP1307302 A1 EP 1307302A1 EP 01960551 A EP01960551 A EP 01960551A EP 01960551 A EP01960551 A EP 01960551A EP 1307302 A1 EP1307302 A1 EP 1307302A1
Authority
EP
European Patent Office
Prior art keywords
cvc
roll
rolls
pair
roll stand
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.)
Granted
Application number
EP01960551A
Other languages
German (de)
French (fr)
Other versions
EP1307302B1 (en
Inventor
Hans-Georg Hartung
Klaus Klamma
Wolfgang Rohde
Jürgen Seidel
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 Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1307302A1 publication Critical patent/EP1307302A1/en
Application granted granted Critical
Publication of EP1307302B1 publication Critical patent/EP1307302B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • 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
    • B21B13/142—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 by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC

Definitions

  • the invention relates to a roll stand with a pair of CVC rolls, preferably a pair of CVC work rolls and a pair of backup rolls, which have a contact area in which a horizontally acting moment acts, which leads to an entanglement of the rolls and thereby to axial forces in the roll bearings.
  • EP 0 049 798 B1 describes a rolling mill with work rolls, which are optionally supported on support rolls or support rolls and intermediate rolls, the work rolls and / or support rolls and / or intermediate rolls being axially displaceable relative to one another and each roll having at least one of these roll pairs with one in the direction is provided with a curved contour running towards one end of the bale, which extends on the two rollers on opposite sides in each case over part of the width of the rolling stock.
  • the cross section of the rolled strip is influenced almost exclusively by the axial displacement of the rolls provided with the curved contour, so that the use of a roll bend is unnecessary.
  • the curved contour of both rollers runs over their entire bale length and has a shape that complements each other in a certain axial position.
  • Roll forms are known from EP 0 294 544 B1, the contour of which is described by a fifth order polynomial. This shape of the roller allows further corrections of the rolled strip.
  • This distribution of the roller circumferential forces causes a moment around the center of the stand, which can lead to the rollers being set and thus to axial forces in the roller bearings.
  • the invention is based on the object of specifying measures in a generic roll stand by means of which the axial forces of the roller bearings are minimized.
  • the object is achieved by the characterizing features of claim 1. Simply by changing the shape of the CVC rollers, the moments acting in the horizontal direction can be minimized without additional effort.
  • a suitable change in shape is achieved according to the invention in that the radius profile of the CVC roller through the polynomial approach
  • R (x) a 0 + ai • x + a 2 • x 2 + + a n • x n described and preferably the so-called wedge factor ai is used as an optimization parameter.
  • the polynomial coefficient a 0 results from the current roller radius.
  • the polynomial coefficients a 2 , a3 and a 4 a 5 , etc. are determined in such a way that the desired setting range for the CVC system results.
  • the polynomial coefficient ai is independent of the adjustment range and line load between the rollers and is therefore freely selectable. This wedge factor or linear component ai can be selected so that minimal axial forces arise when using CVC rollers.
  • the optimum wedge factor a- ⁇ offline and as an average of different displacement positions of the CVC rolls is determined.
  • the averaging does not completely compensate for the axial forces of the roller bearings, it does achieve a minimum value for the entire adjustment range of the rollers.
  • 1 a, 1 b and 1 c a pair of CVC work rolls in different displacement positions and with support rolls as well as the line load distribution in the roll gap and between the rolls,
  • FIGS. 1a, 1b and 1c CVC work rolls 1 are shown in different shift positions.
  • the work rolls 1 are supported by support rolls 2.
  • a rolling strip 3 is located between the work rolls 1.
  • the load in the roll gap is assumed to be constant over the roll belt 3 and regardless of the shift position of the work rolls 1. It is represented by arrows 4.
  • the load between the CVC work rolls 1 and the backup rolls 2 is unevenly distributed over their contact area b CO n t and changes with the shift position of the work rolls 1. This load is represented by arrows 5.
  • the sum of the loads represented by arrows 4 and 5 is the same and opposed.
  • R (x) a 0 + ai • x + a 2 • x 2 + a 3 • x 3
  • the wedge factor ai is independent of the adjustment range and line load between the rollers and can therefore be freely selected For CVC rollers, whose contour is a third-order polynomial is defined, the wedge factor ai leads to a minimum moment M when it is in the range
  • FIG. 3 shows a conventionally ground pair of CVC work rolls which was designed with the aim of making the smallest diameter differences.
  • the tangents 8 touching one end diameter 7 and the convex part of the roller and the other tangents 10 touching the other end diameter 9 and the concave part of the roller run parallel to the axes of the conventionally ground work rolls.
  • the corresponding tangents of the CVC rollers according to FIG. 4 which were designed with optimized wedge, run parallel, but inclined by the optimal wedge angle • (alpha) with respect to the roller axes.

Abstract

The invention relates to a roll stand comprising a crown-variable-control (CVC) roll pair, preferably a CVC working roll pair and a back-up roll pair, which comprise a contact area (bcont) in which a horizontally active torque (M) acts that leads to a twisting of the rolls and thus to axial forces in the roll bearings. In order to keep the axial forces in the roll bearings as small as possible, the torque (M) is minimized by an appropriate CVC grinding.

Description

Walzgerüst mit einem CVC-WalzenpaarRoll stand with a pair of CVC rolls
Die Erfindung betrifft ein Walzgerüst mit einem CVC-Walzenpaar, vorzugsweise einem CVC-Arbeitswalzenpaar und einem Stützwalzenpaέr, die einen Kontaktbereich aufweisen, in dem ein horizontal wirkendes Moment wirkt, das zu einer Verschränkung der Walzen und dadurch zu Axialkräften in den Walzenlagern führt.The invention relates to a roll stand with a pair of CVC rolls, preferably a pair of CVC work rolls and a pair of backup rolls, which have a contact area in which a horizontally acting moment acts, which leads to an entanglement of the rolls and thereby to axial forces in the roll bearings.
Die EP 0 049 798 B1 beschreibt ein Walzwerk mit Arbeitswalzen, die sich gegebenenfalls an Stützwalzen oder Stützwalzen und Zwischen walzen abstützen, wobei die Arbeitswalzen und/oder Stützwalzen und/oder Zwischenwalzen gegeneinander axial verschiebbar sind und jede Walze wenigstens eines dieser Walzenpaare mit einer in Richtung zu einem Ballenende hin verlaufenden, ge- krümmten Kontur versehen ist, die sich an den beiden Walzen jeweils nach entgegengesetzten Seiten über einen Teil der Walzgutbreite erstreckt. Hierbei wird der Walzbandquerschnitt praktisch ausschließlich durch die Axialverschiebung der mit der gekrümmten Kontur versehenen Walzen beeinflusst, so dass sich der Einsatz einer Walzenbiegung erübrigt. Die gekrümmte Kontur beider Walzen verläuft über deren gesamte Ballenlänge und hat eine Gestalt, die sich in einer bestimmten Axialstellung beider Walzen komplementär ergänzt.EP 0 049 798 B1 describes a rolling mill with work rolls, which are optionally supported on support rolls or support rolls and intermediate rolls, the work rolls and / or support rolls and / or intermediate rolls being axially displaceable relative to one another and each roll having at least one of these roll pairs with one in the direction is provided with a curved contour running towards one end of the bale, which extends on the two rollers on opposite sides in each case over part of the width of the rolling stock. In this case, the cross section of the rolled strip is influenced almost exclusively by the axial displacement of the rolls provided with the curved contour, so that the use of a roll bend is unnecessary. The curved contour of both rollers runs over their entire bale length and has a shape that complements each other in a certain axial position.
Aus der EP 0 294 544 B1 sind Walzenformen bekannt, deren Kontur durch ein Polynom fünfter Ordnung beschrieben ist. Diese Walzenform gestattet noch weitergehende Korrekturen des Walzbandes.Roll forms are known from EP 0 294 544 B1, the contour of which is described by a fifth order polynomial. This shape of the roller allows further corrections of the rolled strip.
In beiden vorgenannten Dokumenten wird jedoch nicht beachtet, dass beim Walzvorgang mit CVC-Walzen nicht nur die Walzspaltform und der Profilstellbereich eine Rolle spielen. Insbesondere der Bauaufwand der Walzenlager wird durch Axialkräfte der Walzen beeinflusst, die beim Einsatz einer ungeeigneten Schliff-Form entstehen können. Bedingt durch den - wenn auch kleinen - Durchmesserunterschied über der Ballenlänge einer CVC-Walze ergeben sich unterschiedliche Kontaktkräfte und Umfangsgeschwindigkeiten.In both of the aforementioned documents, however, no attention is paid to the fact that not only the roll gap shape and the profile adjustment area play a role in the rolling process with CVC rolls. In particular, the construction costs of the roller bearings are influenced by the axial forces of the rollers, which can arise when using an unsuitable ground joint shape. Due to the - albeit small - difference in diameter over the bale length of a CVC roller, there are different contact forces and peripheral speeds.
An den Stellen der gepaarten Walzen, die gleichen Durchmesser aufweisen, sind deren Umfangsgeschwindigkeiten gleich. An den anderen Stellen des Walzenkontaktbereichs sind der Durchmesser und damit die Umfangsgeschwindigkeit einer Walze jeweils kleiner oder größer als deren gepaarte Walze. Daraus ergibt sich je nach Festlegung der Koordinatenrichtung ein negativer oder posi- tiver Geschwindigkeitsunterschied zwischen den gepaarten Walzen über deren Kontaktbereich.At the locations of the paired rollers that have the same diameter, their peripheral speeds are the same. At the other points of the roller contact area, the diameter and thus the peripheral speed of a roller are each smaller or larger than the paired roller. Depending on the definition of the coordinate direction, this results in a negative or positive speed difference between the paired rollers over their contact area.
Die unterschiedlich großen und unterschiedlich gerichteten Relativgeschwindigkeiten führen zu unterschiedlich großen und unterschiedlich gerichteten Um- fangs-kräften. Diese Verteilung der Walzenumfangskräfte verursacht ein Moment um die Gerüstmitte, das zum Schränken der Walzen und damit zu Axialkräften in den Walzenlagern führen kann.The differently sized and differently directed relative speeds lead to differently sized and differently directed peripheral forces. This distribution of the roller circumferential forces causes a moment around the center of the stand, which can lead to the rollers being set and thus to axial forces in the roller bearings.
Der Erfindung liegt die Aufgabe zugrunde, bei einem gattungsgemäßen Walz- gerüst Maßnahmen anzugeben, durch die die Axialkräfte der Walzenlager minimiert werden. Die Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Allein durch Änderung der Formgebung der CVC-Walzen können die in horizontaler Richtung wirkenden Momente ohne Zusatzaufwand minimiert werden.The invention is based on the object of specifying measures in a generic roll stand by means of which the axial forces of the roller bearings are minimized. The object is achieved by the characterizing features of claim 1. Simply by changing the shape of the CVC rollers, the moments acting in the horizontal direction can be minimized without additional effort.
Eine geeignete Änderung der Formgebung wird erfindungsgemäß dadurch erreicht, dass der Radiusverlauf der CVC-Walze durch den PolynomansatzA suitable change in shape is achieved according to the invention in that the radius profile of the CVC roller through the polynomial approach
R(x) = a0 + ai • x + a2 • x2 + + an • xn beschrieben und vorzugsweise der sogenannte Keilfaktor ai als Optimierungsparameter verwendet ist. Die Kontur einer CVC-Walze wird definiert durch ein Polynom dritter Ordnung: R(x) = a0 + ai x + a2 x2 + a3 x3 mitR (x) = a 0 + ai • x + a 2 • x 2 + + a n • x n described and preferably the so-called wedge factor ai is used as an optimization parameter. The contour of a CVC roller is defined by a third-order polynomial: R (x) = a 0 + ai x + a 2 x 2 + a 3 x 3 with
L = Radius der CVC-Walze ai = Polynomkoeffizienten x = Koordinate in Ballen-LängsrichtungL = radius of the CVC roller ai = polynomial coefficient x = coordinate in the longitudinal direction of the bale
Bei CVC-Walzen höherer Ordnung werden noch weitere Polynomglieder (a , a5, etc. ) berücksichtigt.With higher-order CVC rolls, further polynomial terms (a, a 5 , etc.) are taken into account.
Der Polynomkoeffizient a0 ergibt sich durch den aktuellen Walzenradius. Die Polynomkoeffizienten a2, a3 sowie a4 a5, etc. werden so festgelegt, dass sich der gewünschte Stellbereich für das CVC-System ergibt. Der Polynomkoeffizient ai ist unabhängig von Stellbereich und Linienbelastung zwischen den Walzen und somit frei wählbar. Dieser Keilfaktor bzw. Linearanteil ai kann so gewählt werden, dass beim Einsatz von CVC-Walzen minimale Axialkräfte entstehen.The polynomial coefficient a 0 results from the current roller radius. The polynomial coefficients a 2 , a3 and a 4 a 5 , etc. are determined in such a way that the desired setting range for the CVC system results. The polynomial coefficient ai is independent of the adjustment range and line load between the rollers and is therefore freely selectable. This wedge factor or linear component ai can be selected so that minimal axial forces arise when using CVC rollers.
Aus Gründen der Praktikabilität wird der optimale Keilfaktor a-\ offline und als Mittelwert aus verschiedenen Schiebepositionen der CVC-Walzen (z. B. minimale, neutrale und maximale Schiebeposition) bestimmt. Durch die Mittelwertbildung wird zwar keine vollständige Kompensation der Axialkräfte der Walzen- lager erreicht, aber ein im gesamten Verstellbereich der Walzen minimaler Wert derselben.For reasons of practicality, the optimum wedge factor a- \ offline and as an average of different displacement positions of the CVC rolls (for. Example minimum, neutral and maximum shift position) is determined. Although the averaging does not completely compensate for the axial forces of the roller bearings, it does achieve a minimum value for the entire adjustment range of the rollers.
Aufgrund mathematischer Überlegungen und empirischer Daten hat sich als vorteilhaft herausgestellt, dass der Keilfaktor ai für eine Walze mit einem Poly- nomansatz 3. Ordnung im Bereich von liegt.Based on mathematical considerations and empirical data, it has been found to be advantageous that the wedge factor ai for a roll with a 3rd order polynomial approach in the range of lies.
Entsprechende Überlegungen führen dazu, dass der Keilfaktor a- für eine Walze mit einem Polynomansatz δ.Ordnung durch den AusdruckAppropriate considerations lead to the fact that the wedge factor a- for a roll with a polynomial approach δ
ai = f 1 • a3 • b2cont + • a5 • b' contai = f 1 • a 3 • b 2 cont + • a 5 • b 'cont
beschreibbar ist, mitis writable with
fι = bis undfι = bis and
20 20 f2= 0 bis-20 20 f 2 = 0 bis-
112112
Weitere Merkmale der Erfindung ergeben sich aus den Patentansprüchen und der nachfolgenden Beschreibung sowie der Zeichnung, in der Ausführungsbeispiele der Erfindung schematisch dargestellt sind.Further features of the invention result from the patent claims and the following description and the drawing, in which exemplary embodiments of the invention are shown schematically.
Es zeigen:Show it:
Fig. 1 a, 1 b und 1 c ein CVC-Arbeitswalzenpaar in unterschiedlicher Verschiebeposition und mit Stützwalzen sowie die Linienlastvertei- lung im Walzspalt und zwischen den Walzen,1 a, 1 b and 1 c a pair of CVC work rolls in different displacement positions and with support rolls as well as the line load distribution in the roll gap and between the rolls,
Fig. 2 Umfangskraftverteilung im Kontaktbereich zweier Walzen,2 peripheral force distribution in the contact area of two rollers,
Fig. 3 CVC-Arbeitswalzenpaar mit konventionellem Schliff,3 CVC pair of work rolls with conventional grinding,
Fig. 4 CVC-Arbeitswalzenpaar mit optimaler Keiligkeit. In den Figuren 1a, 1b und 1c sind CVC-Arbeitswalzen 1 in unterschiedlichen Verschiebepositionen dargestellt. Die Arbeitswalzen 1 sind von Stützwalzen 2 gestützt. Zwischen den Arbeitswalzen 1 befindet sich ein Walzband 3.Fig. 4 pair of CVC work rolls with optimal wedge. In FIGS. 1a, 1b and 1c, CVC work rolls 1 are shown in different shift positions. The work rolls 1 are supported by support rolls 2. A rolling strip 3 is located between the work rolls 1.
Die Last im Walzspalt wird als konstant über dem Walzband 3 und unabhängig von der Verschiebeposition der Arbeitswalzen 1 angenommen. Sie ist durch Pfeile 4 dargestellt. Die Last zwischen den CVC-Arbeitswalzen 1 und den Stützwalzen 2 ist über deren Kontaktbereich bCOnt ungleich verteilt und ändert sich mit der Verschiebeposition der Arbeitswalzen 1. Diese Last ist durch Pfeile 5 dargestellt. Die Summe der durch die Pfeile 4 und 5 dargestellten Lasten ist gleich und entgegengerichtet.The load in the roll gap is assumed to be constant over the roll belt 3 and regardless of the shift position of the work rolls 1. It is represented by arrows 4. The load between the CVC work rolls 1 and the backup rolls 2 is unevenly distributed over their contact area b CO n t and changes with the shift position of the work rolls 1. This load is represented by arrows 5. The sum of the loads represented by arrows 4 and 5 is the same and opposed.
Die sich aus den Walzenformen ergebenden Lastpfeile 5 und die lokale positive oder negative Relativgeschwindigkeit führen gemäß Figur 2 zu unterschiedlichen Umfangskräften Q| über die Kontaktbreite bCOnt- Diese Verteilung der Wal- zenumfangskraft Qj verursacht ein Moment M um die Walzengerüstmitte 6, was zum Schränken der Walzen 1 , 2 und damit zu Axialkräften in deren Lagern führen kann.The load arrows 5 resulting from the roll shapes and the local positive or negative relative speed lead according to FIG. 2 to different circumferential forces Q | over the contact width b CO n t - This distribution of the roll circumferential force Qj causes a moment M around the roll stand center 6, which can lead to the rolls 1, 2 being set and thus to axial forces in their bearings.
Dies wird verhindert durch eine entsprechende Walzenschliff-Form. Bei CVC- Walzen mit der Walzenkontur nach einem Polynomansatz dritten Grades gemäßThis is prevented by an appropriate roller grinding shape. For CVC rolls with the roll contour according to a third degree polynomial approach
R(x) = a0 + ai • x + a2 • x2 + a3 • x3 R (x) = a 0 + ai • x + a 2 • x 2 + a 3 • x 3
steht nur der Faktor a1 ( der sogenannte Keilfaktor für eine Variation des Schliffbildes zur Verfügung, weil der Polynomkoeffizient ao den jeweiligen Walzenradius und die Polynomkoeffizienten a2, a3, a4, a5 usw. den gewünschten Stellbereich des CVC-Systems bestimmen. Lediglich der Keilfaktor ai ist unabhängig von Stellbereich und Linienbelastung zwischen den Walzen und somit frei wählbar. Bei CVC-Walzen, deren Kontur durch ein Polynom dritter Ordnung definiert ist, führt der Keilfaktor a-i zu einem minimalen Moment M, wenn er im Bereichonly the factor a 1 ( the so-called wedge factor is available for a variation of the micrograph, because the polynomial coefficient ao determines the respective roller radius and the polynomial coefficients a 2 , a 3 , a 4 , a 5 etc. determine the desired setting range of the CVC system. Only the wedge factor ai is independent of the adjustment range and line load between the rollers and can therefore be freely selected For CVC rollers, whose contour is a third-order polynomial is defined, the wedge factor ai leads to a minimum moment M when it is in the range
aι = ~ bis ~ * a3 * b2∞nt liegt. 20 20 a ι = ~ to ~ * a 3 * b2 ∞nt. 20 20
Für CVC-Walzen, deren Kontur durch ein Polynom 5. Ordnung definiert ist, er- reicht das Moment M ein Minimum, wenn der KeilfaktorFor CVC rolls, whose contour is defined by a 5th order polynomial, the moment M reaches a minimum if the wedge factor
ai = f Λ • a3 • b2cont + f2 * a5 • b4 COnt beträgt mit fι = bis undai = f Λ • a 3 • b 2 cont + f 2 * a 5 • b 4 CO nt with fι = bis and
20 20 f2= 0 bis-20 20 f 2 = 0 bis-
112112
In Figur 3 ist ein konventionell geschliffenes CVC-Arbeitswalzenpaar dargestellt, das mit dem Ziel kleinster Durchmesserdifferenzen ausgelegt wurde. Die einen Enddurchmesser 7 und die konvexe Partie der Walze berührende Tan- gente 8 und die den anderen Enddurchmesser 9 und die konkave Partie der Walze berührende andere Tangente 10 verlaufen parallel zu den Achsen der konventionell geschliffenen Arbeitswalzen. Demgegenüber verlaufen die entsprechenden Tangenten der CVC-Walzen gemäß Figur 4, die mit optimierter Keiligkeit ausgelegt wurden, parallel, jedoch gegenüber den Walzenachsen um den optimalen Keilwinkel • (alpha) geneigt. FIG. 3 shows a conventionally ground pair of CVC work rolls which was designed with the aim of making the smallest diameter differences. The tangents 8 touching one end diameter 7 and the convex part of the roller and the other tangents 10 touching the other end diameter 9 and the concave part of the roller run parallel to the axes of the conventionally ground work rolls. In contrast, the corresponding tangents of the CVC rollers according to FIG. 4, which were designed with optimized wedge, run parallel, but inclined by the optimal wedge angle • (alpha) with respect to the roller axes.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 , 1 ' CVC-Arbeitswalzen1, 1 ' CVC work rolls
2 Stützwalzen2 support rollers
3 Walzband 4 Pfeil (Last im Walzspalt)3 rolled strip 4 arrow (load in the roll gap)
5 Pfeil (Last zwischen Arbeitswalze 1 und Stützwalze 2)5 arrow (load between work roll 1 and backup roll 2)
6 Walzgerüstmitte 7, 7' Enddurchmesser , 8' Tangente , 9' anderer Enddurchmesser6 Roll stand center 7, 7 ' final diameter, 8 ' tangent, 9 ' other final diameter
10, 10' andere Tangente 10, 10 ' other tangent

Claims

Patentansprüche claims
1. Walzgerüst mit einem CVC-Walzenpaar, vorzugsweise einem CVC- Arbeits-walzenpaar und einem Stützwalzenpaar, die einen Kontaktbereich bCont aufweisen, in dem ein horizontal wirkendes Moment M wirkt, das zu einer Verschränkung der Walzen und dadurch zu Axialkräften in den Walzenlagern führt, dadurch gekennzeichnet, dass das Moment (M) durch einen geeigneten CVC-Schliff minimiert ist.1. Roll stand with a pair of CVC rolls, preferably a pair of CVC work rolls and a pair of backup rolls, which have a contact area b Co n t in which a horizontally acting moment M acts, which leads to an entanglement of the rolls and thereby to axial forces in the Roller bearings leads, characterized in that the moment (M) is minimized by a suitable CVC grinding.
2. Walzgerüst nach Anspruch 1 , dadurch gekennzeichnet, dass der Radiusverlauf der CVC-Walzen durch den Polynomansatz2. Roll stand according to claim 1, characterized in that the radius profile of the CVC rolls through the polynomial approach
R(x) = a0 + ai • x + a2 • x2 + + an • xn beschrieben und vorzugsweise der Keilfaktor ai als Optimierungsparameter verwendet ist.R (x) = a 0 + ai • x + a 2 • x 2 + + a n • x n and preferably the wedge factor ai is used as an optimization parameter.
3. Walzgerüst nach Anspruch 2, dadurch gekennzeichnet, dass der optimale Keilfaktor a- offline und als Mittelwert aus verschiedenen Schiebepositionen der CVC-Walzen (z. B. minimale, neutrale und maximale Schiebeposition) vorbestimmt ist.3. Roll stand according to claim 2, characterized in that the optimal wedge factor a- offline and as a mean value from different sliding positions of the CVC rollers (z. B. minimum, neutral and maximum sliding position) is predetermined.
4. Walzgerüst nach Anspruch 3, dadurch gekennzeichnet, dass der Keilfaktor a-t für eine Walze mit einem Polynomansatz 3. Ordnung im Bereich 1 ' &1 = ~ 20 b'S ~ 20 " 33 " b2cont lje9t" Walzgerüst nach Anspruch 3, dadurch gekennzeichnet, dass der Keilfaktor ai für eine Walze mit einem Polynomansatz 5. Ordnung durch den Ausdruck aΛ = • a3 • b2cont + fa • a5 • b4 cont beschreibbar ist, mit4. Roll stand according to claim 3, characterized in that the wedge factor at for a roll with a 3rd order polynomial approach in the range 1 '& 1 = ~ 20 b ' S ~ 20 " 33 " b2cont lje9t " Roll stand according to claim 3, characterized in that the wedge factor ai for a roll with a 5th order polynomial approach can be described by the expression a Λ = • a 3 • b 2 cont + fa • a 5 • b 4 con t
fι = bis und f2= 0 bis-fι = bis and f 2 = 0 bis-
20 20 1 12 20 20 1 12
EP01960551A 2000-08-10 2001-07-25 Roll stand comprising a crown-variable-control (cvc) roll pair Expired - Lifetime EP1307302B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10039035 2000-08-10
DE10039035A DE10039035A1 (en) 2000-08-10 2000-08-10 Roll stand with a pair of CVC rolls
PCT/EP2001/008581 WO2002011916A1 (en) 2000-08-10 2001-07-25 Roll stand comprising a crown-variable-control (cvc) roll pair

Publications (2)

Publication Number Publication Date
EP1307302A1 true EP1307302A1 (en) 2003-05-07
EP1307302B1 EP1307302B1 (en) 2004-10-06

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EP01960551A Expired - Lifetime EP1307302B1 (en) 2000-08-10 2001-07-25 Roll stand comprising a crown-variable-control (cvc) roll pair

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US (1) US7059163B2 (en)
EP (1) EP1307302B1 (en)
JP (1) JP4907042B2 (en)
CN (1) CN1254320C (en)
AT (1) ATE278482T1 (en)
AU (1) AU2001282020A1 (en)
BR (1) BR0113149A (en)
CA (1) CA2420608C (en)
CZ (1) CZ298354B6 (en)
DE (2) DE10039035A1 (en)
ES (1) ES2228927T3 (en)
RU (1) RU2268795C2 (en)
TR (1) TR200402674T4 (en)
WO (1) WO2002011916A1 (en)
ZA (1) ZA200300859B (en)

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CN1446130A (en) 2003-10-01
EP1307302B1 (en) 2004-10-06
CZ298354B6 (en) 2007-09-05
DE50104024D1 (en) 2004-11-11
BR0113149A (en) 2003-07-08
CA2420608A1 (en) 2003-02-06
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ZA200300859B (en) 2003-10-16
DE10039035A1 (en) 2002-02-21
WO2002011916A1 (en) 2002-02-14
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US20040003644A1 (en) 2004-01-08
CZ2003405A3 (en) 2003-08-13
JP4907042B2 (en) 2012-03-28
US7059163B2 (en) 2006-06-13
ATE278482T1 (en) 2004-10-15
RU2268795C2 (en) 2006-01-27
AU2001282020A1 (en) 2002-02-18
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TR200402674T4 (en) 2004-11-22
CN1254320C (en) 2006-05-03

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