EP2026916B1 - Rolling stand for producing rolled strip or sheet - Google Patents
Rolling stand for producing rolled strip or sheet Download PDFInfo
- Publication number
- EP2026916B1 EP2026916B1 EP07725995A EP07725995A EP2026916B1 EP 2026916 B1 EP2026916 B1 EP 2026916B1 EP 07725995 A EP07725995 A EP 07725995A EP 07725995 A EP07725995 A EP 07725995A EP 2026916 B1 EP2026916 B1 EP 2026916B1
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- EP
- European Patent Office
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- rolls
- contour
- barrel
- function
- supporting
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- 238000005096 rolling process Methods 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 230000000295 complement effect Effects 0.000 claims description 25
- 238000009826 distribution Methods 0.000 abstract description 16
- 238000012886 linear function Methods 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
-
- 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
-
- 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
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/025—Quarto, four-high stands
-
- 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
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/028—Sixto, six-high stands
-
- 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
- B21B27/021—Rolls for sheets or strips
- B21B2027/022—Rolls having tapered ends
-
- 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
- B21B27/021—Rolls for sheets or strips
Definitions
- the invention relates to a rolling stand for the production of rolled strip or sheet metal with work rolls, which are supported on backup rolls or intermediate rolls and backup rolls, wherein the work rolls and / or intermediate rolls are arranged axially displaceable against each other in the rolling stand and each working and / or intermediate roll over the entire having effective bale length, curved, describable by a trigonometric function bale contour and complement these two bale contours complementary only in a certain relative axial position of the rollers of the roller pair in the unloaded state.
- a rolling stand of the generic type is already out of EP-A 0258482 known.
- the roll bale contour of the in the professional world under the name SmartCrown® from eg the AT 410765B known rollers can be mathematically described by a modified sine function. By a suitable choice of the contour parameters, this results in a cosinusoidal idling gap, which can be influenced in its amplitude by axial displacement of the rollers.
- Object of the present invention is therefore to avoid the disadvantages of the prior art described above and to propose a rolling mill, to minimize the inhomogeneities in the load distribution along the contact line of the support rollers and their adjacent rollers and in particular reduce local load peaks in the load distribution curve and thus the duration of use To increase the rollers and the necessary regrinding intervals.
- this partial or complete complement of the bale contours refers to the two back-up rolls and the respective adjacent work rolls.
- this partial or complete complement of the bale contours refers to the two back-up rolls and the respective adjacent intermediate rolls.
- the shortest possible displacement stroke of the work rolls is advantageous, since both the displacement time and the plant technology to be provided for sliding guides can be kept short.
- a short displacement stroke leads to larger diameter differences over the bale length occurring with a given profile adjustment range of the work rolls than with a longer displacement stroke.
- rollers in the rolling stand are aligned according to a possible embodiment of the invention so that a complete complement of the bale contours of the back-up rolls and the immediately adjacent work rolls or intermediate rolls in the unshifted state of the immediately adjacent work rolls or intermediate rolls occurs.
- R B (x) support roller radius at the point x of the axial support roller extension, R 0 radius offset, r B (x) contour at the point x of the axial support roll extension and k correction factor
- the complete complement of the roll bale contours results.
- a complete completion of the roll bale contours is no longer possible.
- the contour factor may be greater or less than 1.
- bale ends of the rolls are usually chamfered and thus have an exemption in these edge regions.
- Exemptions of this kind are from the EP 0 258 482 A1 or the EP 1 228 818 A2 already known. These exemptions are formed in contoured roll bales in marginal areas with increasing towards the edge bale radius by a cylindrical bale end, as in the EP 0 258 482 A1 is shown or may be formed in rolls with cylindrical roll bale contour by a cone-shaped edge region, as for example in the EP 1 228 818 A2 is shown and described.
- FIGS. 1 to 4 The load distribution between back-up rolls and work rolls in a prior art roll bale contour is contrasted with the load distribution between back-up rolls and work rolls in a roll bale contour according to the invention using the example of a four-high stand.
- FIG. 1 shows a schematic representation of the roller assembly in a four-high stand for rolling a metal strip B, in particular a steel strip with work rolls 1 and support rollers 2.
- the axially displaceable work rolls 1 each have a writable by a modified sine function bale contour 3. These bale contours 3 complement each other in a certain relative axial position of the rolls of the pair of work rolls complementary.
- the work rolls 1 are supported by support rollers 2, which have a cylindrical bale contour 4 and are supported on the work rolls acting rolling forces.
- the load distribution between the upper work roll 1 and the upper support roll 2 is in this case the roll bale design in FIG.
- FIG. 3 shows a schematic representation of the roll arrangement in a four-high stand with work rolls 1 and support rolls 2.
- the axially displaceable work rolls 1 each have a bale contour 3 which can be described by a modified sine function, these bale contours being complementary in a specific relative axial position of the work rolls complete.
- the two support rollers 2 also have a complementary complementary bale contour 4, which is also formed by a modified sine function, the bale contours of the adjacent, cooperating work roll 1 and support roller 2 completely complement each other in an unloaded state.
- the load distribution between the upper work roll 1 and the upper support roll 2 is in this case the roll bale design in FIG. 4 shown. Load peaks in the edge area appear differently depending on the axial displacement. Altogether it shows over the rolling ball course at the However, the invention already a basic equalization of the load distribution.
- FIG. 5 shows in a schematic arrangement, the roller assembly in a SextoGerüst with work rolls 1, intermediate rolls 5 and back-up rolls 2, wherein the work rolls are supported on the intermediate rolls on the support rollers.
- the work rolls 1 are equipped with a cylindrical bale contour 3.
- the bale contour of the work rolls can also be oriented to the bale contour of the adjacent intermediate rolls.
- the intermediate rollers 5 have a bale contour 6 that can be described by a modified sine function.
- the support rollers 2 have a bale contour 4 that can be described by a sine function.
- the bale contours 4 of the support rollers 2 and the bale contour of the intermediate rollers 5 complement each other completely in the unshifted axial position of the axially adjustable intermediate rollers 5 in the unloaded state.
- FIG. 6 shows work rolls 1 and back-up rolls 2 in a four-high stand in a schematic representation
- the basic structure of the bale contours 3, 4 follows the embodiment of Figure 3.
- a sexto scaffold analogous to FIG. 5 possible to change the contour of the support rollers and the intermediate rollers by a correction factor k, whereby in the unloaded state only a partial complement of the bale contours of the support roller and the immediately adjacent intermediate roller occurs.
- FIG. 7 the course of the roll bale contour 7 of a back-up roll or intermediate roll or work roll over the bale length is shown.
- dash-dotted lines 8, 9 known from the prior art possibilities of chamfering a roller in the end regions are shown to avoid high edge pressures.
- the chamfering according to the dotted line 8 produces a cylindrical end portion and the chamfering corresponding to the dotted line 9 a cone-shaped end portion of the rollers, in both cases a kink 10 in the contour over the bale length occurs, which forms a circumferential edge on the roller.
- An improvement in the Loading conditions result from a chamfer gradually approaching chamfer, resulting in both sides of a corrected bale contour, which is illustrated by the dotted lines 11 and 12.
- both curves have the same slope as the tangent t.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
- Rolling Contact Bearings (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Milling Processes (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
Die Erfindung betrifft ein Walzgerüst zur Herstellung von Walzband oder Blech mit Arbeitswalzen, die sich an Stützwalzen oder Zwischenwalzen und Stützwalzen abstützen, wobei die Arbeitswalzen und/oder Zwischenwalzen im Walzgerüst gegeneinander axial verschiebbar angeordnet sind und jede Arbeits- und/oder Zwischenwalze eine über die gesamte wirksame Ballenlänge verlaufende, gekrümmte, durch eine trigonometrische Funktion beschreibbare Ballenkontur aufweist und sich diese beiden Ballenkonturen ausschließlich in einer bestimmten relativen Axialstellung der Walzen des Walzenpaares im unbelasteten Zustand komplementär ergänzen.The invention relates to a rolling stand for the production of rolled strip or sheet metal with work rolls, which are supported on backup rolls or intermediate rolls and backup rolls, wherein the work rolls and / or intermediate rolls are arranged axially displaceable against each other in the rolling stand and each working and / or intermediate roll over the entire having effective bale length, curved, describable by a trigonometric function bale contour and complement these two bale contours complementary only in a certain relative axial position of the rollers of the roller pair in the unloaded state.
Bei Quarto-Walzgerüsten oder Sexto-Walzgerüsten gehört es zur gängigen Praxis, zumindest die beiden Arbeitswalzen oder die beiden Zwischenwalzen mit einer speziellen Ballenkontur auszustatten und axial wirkende Verstelleinrichtungen für diese Arbeitswalzen oder Stützwalzen vorzusehen, um die Walzspaltkontur in Abhängigkeit vom aktuellen Walzbandprofil einstellen zu können.In the case of four-high rolling stands or six-high rolling stands, it is common practice to equip at least the two work rolls or the two intermediate rolls with a special bale contour and to provide axially acting adjusting devices for these work rolls or backup rolls in order to be able to set the roll gap contour as a function of the current rolled strip profile.
Ein Walzgerüst der gattungsbildenden Art ist bereits aus der
Bei Einsatz von Arbeitswalzen bzw. Zwischenwalzen mit dieser speziellen Ballenkontur und zylindrisch geformten Stützwalzen in Quarto- oder Sexto-Walzgerüsten, wie im Normalfall üblich, ist es unvermeidbar, dass es im laufenden Walzbetrieb zu inhomogenen Lastverteilungen zwischen den Stützwalzen und den unmittelbar benachbarten Walzen kommt. Da der mit Hilfe der konturierten Walzen abzudeckende Balligkeitsbereich immer durch die Anforderungen des Walzprozesses bestimmt werden, wie beispielsweise durch unterschiedliche Prozessparameter, Dimensionen und verformungstechnische Eigenschaften des Walzgutes, ist der Verschiebehub der konturierten Walzen die einzige Einflussgröße, mit welcher sich die Ausgeprägtheit der Inhomogenität der Lastverteilung beeinflussen lässt.When using work rolls or intermediate rolls with this special bale contour and cylindrically shaped back-up rolls in quarto or six-high rolling stands, as is usual in the normal case, it is unavoidable that during continuous rolling operation inhomogeneous load distributions occur between the back-up rolls and the immediately adjacent rolls. Since the crown area to be covered with the aid of the contoured rolls is always determined by the requirements of the rolling process, for example by different process parameters, dimensions and deformation properties of the rolling stock, the displacement stroke of the contoured rolls is the only one Influence variable with which the expressiveness of the inhomogeneity of the load distribution can be influenced.
Aufgabe der vorliegenden Erfindung ist es daher, die zuvor beschriebenen Nachteile des Standes der Technik zu vermeiden und ein Walzgerüst vorzuschlagen, bei dem Inhomogenitäten in der Lastverteilung entlang der Kontaktlinie der Stützwalzen und ihrer Nachbarwalzen zu minimieren und insbesondere örtliche Belastungsspitzen im Lastverteilungsverlauf abzubauen und damit die Einsatzdauer der Walzen und die notwendigen Nachschleifintervalle zu vergrößern.Object of the present invention is therefore to avoid the disadvantages of the prior art described above and to propose a rolling mill, to minimize the inhomogeneities in the load distribution along the contact line of the support rollers and their adjacent rollers and in particular reduce local load peaks in the load distribution curve and thus the duration of use To increase the rollers and the necessary regrinding intervals.
Diese Aufgabe wird durch ein Walzgerüst mit den Merkmalen von Anspruch 1 in Kombination gelöst.This object is achieved by a rolling mill with the features of
Bei einem Quartogerüst bezieht sich diese teilweise oder vollständige Ergänzung der Ballenkonturen auf die beiden Stützwalzen und die jeweils benachbarten Arbeitswalzen. Bei einem Sextogerüst bezieht sich diese teilweise oder vollständige Ergänzung der Ballenkonturen auf die beiden Stützwalzen und die jeweils benachbarten Zwischenwalzen.In a quartz scaffolding, this partial or complete complement of the bale contours refers to the two back-up rolls and the respective adjacent work rolls. In a sexto scaffolding, this partial or complete complement of the bale contours refers to the two back-up rolls and the respective adjacent intermediate rolls.
Aus prozesstechnischer Sicht ist ein möglichst kurzer Verschiebehub der Arbeitswalzen von Vorteil, da damit sowohl die Verschiebezeit als auch die anlagentechnisch vorzusehenden Verschiebeführungen kurz gehalten werden können. Ein kurzer Verschiebehub führt allerdings dazu, dass bei einem vorgegebenen Profilstellbereich der Arbeitswalzen größere Durchmesserunterschiede über der Ballenlänge auftreten als bei einem längeren Verschiebehub. Diese Nachteile aus einem kurzen Verschiebehub können durch die komplementäre Ergänzung der Ballenkonturen von Stützwalzen und benachbarten Walzen wesentlich reduziert werden.From a process engineering point of view, the shortest possible displacement stroke of the work rolls is advantageous, since both the displacement time and the plant technology to be provided for sliding guides can be kept short. However, a short displacement stroke leads to larger diameter differences over the bale length occurring with a given profile adjustment range of the work rolls than with a longer displacement stroke. These disadvantages of a short displacement stroke can be significantly reduced by the complementary complement of the bale contours of backup rolls and adjacent rolls.
Die Walzen im Walzgerüst sind nach einer möglichen Ausführungsform der Erfindung so ausgerichtet, dass eine vollständige Ergänzung der Ballenkonturen der Stützwalzen und der unmittelbar benachbarten Arbeitswalzen oder Zwischenwalzen im unverschobenen Zustand der unmittelbar benachbarten Arbeitswalzen oder Zwischenwalzen auftritt.The rollers in the rolling stand are aligned according to a possible embodiment of the invention so that a complete complement of the bale contours of the back-up rolls and the immediately adjacent work rolls or intermediate rolls in the unshifted state of the immediately adjacent work rolls or intermediate rolls occurs.
Da der maximale Verschiebehub in der Regel jedoch wesentlich kleiner als die Walzenballenlänge ist, treten auch in einem verschobenen Zustand der Walzen im unbelasteten Zustand zwischen den Walzen wesentlich kleinere Spalte als bei zylindrischen Stützwalzen auf, wodurch es in jedem Betriebszustand zu einer annähernd homogenen Lastverteilung zwischen den Walzen kommt.Since the maximum displacement stroke is, however, usually much smaller than the roll barrel length, occur in a shifted state of the rolls in unloaded state between the rollers much smaller gap than in cylindrical support rollers, whereby it comes in any operating condition to an approximately homogeneous load distribution between the rollers.
Nach einer weiteren möglichen Ausführungsform der Erfindung wird die zugrunde liegende Aufgabe auch dann gelöst, wenn eine unvollständige Ergänzung der Ballenkonturen der Stützwalzen und der unmittelbar benachbarten Arbeitswalzen oder Zwischenwalzen im unverschobenen Zustand der unmittelbar benachbarten Arbeitswalzen oder Zwischenwalzen unter der Bedingung auftritt, dass bei einem Stützwalzenradius RB(x) entsprechend der Formel RB(x) = R0 + k.rB(x)
mit
RB(x) Stützwalzenradius an der Stelle x der axialen Stützwalzenerstreckung,
R0 Radiusoffset,
rB(x) Kontur an der Stelle x der axialen Stützwalzenerstreckung und
k Korrekturfaktor,
der Korrekturfaktor k im Intervall 0 < k ≤ 2 unter Ausschluss des Wertes k = 1 festgelegt ist.According to another possible embodiment of the invention, the underlying object is also achieved when an incomplete complement of the bale contours of the backing rolls and the immediately adjacent work rolls or intermediate rolls in the unshifted state of the immediately adjacent work rolls or intermediate rolls under the condition that at a Stützwalzenradius R B (x) according to the formula R B (x) = R 0 + kr B (x)
With
R B (x) support roller radius at the point x of the axial support roller extension,
R 0 radius offset,
r B (x) contour at the point x of the axial support roll extension and
k correction factor,
the correction factor k is set in the
Dieser Formalismus lässt sich ausgehend von einer Betrachtung der geometrischen Zusammenhänge bei einer vollständigen Ergänzung der Walzenballenkonturen einer Stützwalze und ihrer benachbarten Walze darstellen.This formalism can be seen starting from a consideration of the geometric relationships in a complete complement of the roll bale contours of a back-up roll and its adjacent roll.
Bei einer vollständigen Ergänzung der Walzenballenkontur der Stützwalze und der benachbarten Walze (Zwischenwalze oder Arbeitswalze) sind die Achsen der beiden Walzen im unbelasteten Zustand parallel. Für die Radien der Walzen bedeutet dies:
mit
- RN(x)
- Radius der Nachbarwalze an der Stelle x
- RB(x)
- Radius der Stützwalze an der Stelle x
- A
- Achsabstand
With
- R N (x)
- Radius of the neighbor roller at the point x
- R B (x)
- Radius of the support roller at the point x
- A
- Wheelbase
Durch die Definition der Kontur der Arbeits- oder Zwischenwalze ist damit auch die Kontur der Stützwalze in diesem Fall vollständig bestimmt. Der Radius setzt sich dabei aus einem Offset-Wert R0 und der eigentlichen Kontur rB zusammen, die eine modifizierte Sinusfunktion darstellt:
mit
- R0
- Radiusoffset
- rB(x)
- Kontur an der Stelle x
With
- R 0
- radius offset
- r B (x)
- Contour at the point x
Eine unvollständige Ergänzung tritt daher dann auf, wenn die Konturfunktion rB durch einen Korrekturfaktor k modifiziert wird. Daraus folgt:
mit
- k
- Konturfaktor (k ≠ 1)
With
- k
- Contour factor (k ≠ 1)
Für den Fall k = 1 ergibt sich die vollständige Ergänzung der Walzenballenkonturen. Bei einer Abweichung des Konturfaktors k vom Wert k = 1 ist eine vollständige Ergänzung der Walzenballenkonturen nicht mehr gegeben. Der Konturfaktor kann größer oder kleiner als 1 sein. Die Position der Extrempunkte und der Wendepunkte der Walzenballenkontur bleiben dabei unverändert. Nimmt der Konturfaktor k den Wert 0 an, wird die Stützwalzen-Ballenkontur zylindrisch. Eine ausreichende Minimierung der Inhomogenitäten in der Lastverteilung entlang der Walzenballenkontur wird mit Korrekturfaktoren im gewählten Bereich 0 < k ≤ 2 unter Ausschluss des Wertes k=1 erreicht.For the case k = 1, the complete complement of the roll bale contours results. In the case of a deviation of the contour factor k from the value k = 1, a complete completion of the roll bale contours is no longer possible. The contour factor may be greater or less than 1. The position of the extreme points and the turning points of the roll bale contour remain unchanged. If the contour factor k assumes the
Um unzulässig hohe Kantenpressungen zwischen Arbeitswalzen und Stützwalzen oder zwischen Zwischenwalzen und Stützwalzen zu vermeiden, sind Ballenenden der Walzen üblicherweise angefast und weisen in diesen Randbereichen somit eine Freistellung auf. Freistellungen dieser Art sind aus der
Sehr gute Ergebnisse hinsichtlich einer Minimierung und Vergleichmäßigung der Lastverteilung werden erzielt, wenn die Anfasungsfunktion von einer Kreisfunktion gebildet ist. Ähnlich gute Ergebnisse werden auch erzielt, wenn die Anfasungsfunktion von einer Sinusfunktion oder einer Funktion 2. Ordnung, beispielsweise einer parabolischen Funktion gebildet ist.Very good results in terms of minimization and equalization of the load distribution are achieved when the chamfering function is formed by a circular function. Similarly good results are achieved if the chamfering function is formed by a sine function or a second-order function, for example a parabolic function.
Weitere Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung nicht einschränkender Ausführungsbeispiele, wobei auf die beiliegenden Figuren Bezug genommen wird, die Folgendes zeigen:
- Fig. 1
- die schematische Darstellung eines Quarto-Gerüstes mit konturierten Arbeitswalzen und zylindrischen Stützwalzen gemäß dem Stand der Technik,
- Fig. 2
- die typische Lastverteilung zwischen Arbeitswalzen und Stützwalzen in einem Quarto-
Gerüst gemäß Figur 1 , - Fig. 3
- die schematische Darstellung eines Quarto-Gerüstes mit konturierten Arbeitswalzen und komplementären Stützwalzen.
- Fig. 4
- die typische Lastverteilung zwischen Arbeitswalzen und Stützwalzen in einem Quarto-
Gerüst gemäß Figur 3, - Fig. 5
- die schematische Darstellung eines Sexto-Gerüstes mit konturierten Stützwalzen und komplementären Zwischenwalzen,
- Fig. 6
- die schematische Darstellung eines Quarto-Gerüstes mit konturierten Arbeitswalzen und komplementären Stützwalzen mit einem Korrekturfaktor k=0,75,
- Fig. 7
- die erfindungsgemäße Kontur der oberen Stützwalze mit einer kreisförmigen Anfasung im Vergleich mit einer Ballenkontur gemäß Stand der Technik.
- Fig. 1
- 1 is a schematic representation of a quarto stand with contoured work rolls and cylindrical support rolls according to the prior art;
- Fig. 2
- the typical load distribution between work rolls and back-up rolls in a four-high stand according to
FIG. 1 . - Fig. 3
- the schematic representation of a four-high stand with contoured work rolls and complementary support rollers.
- Fig. 4
- the typical load distribution between work rolls and back-up rolls in a four-high stand according to FIG. 3,
- Fig. 5
- the schematic representation of a six-high stand with contoured backup rolls and complementary intermediate rolls,
- Fig. 6
- the schematic representation of a quarto-framework with contoured work rolls and complementary back-up rolls with a correction factor k = 0.75,
- Fig. 7
- the inventive contour of the upper support roller with a circular chamfer compared with a bale contour according to the prior art.
In den
Figur 3 zeigt in einer schematischen Darstellung die Walzenanordnung in einem Quarto-Gerüst mit Arbeitswalzen 1 und Stützwalzen 2. Die axial verschiebbaren Arbeitswalzen 1 weisen jeweils eine durch eine modifizierte Sinusfunktion beschreibbare Ballenkontur 3 auf, wobei sich diese Ballenkonturen in einer bestimmten relativen Axialstellung der Arbeitswalzen komplementär ergänzen. Die beiden Stützwalzen 2 weisen ebenfalls eine sich ergänzende komplementäre Ballenkontur 4 auf, die ebenfalls von einer modifizierten Sinusfunktion gebildet ist, wobei sich die Ballenkonturen der benachbarten, zusammenwirkenden Arbeitswalze 1 und Stützwalze 2 in einem unbelasteten Zustand vollständig ergänzen. Die Lastverteilung zwischen der oberen Arbeitswalze 1 und der oberen Stützwalze 2 ist für diesen Fall der Walzenballengestaltung in
Nach einer nicht dargestellten Ausführungsform ist es gleichermaßen bei einem SextoGerüst analog der
In
Claims (6)
- Rolling mill stand for the production of rolled strip or sheet metal, with working rolls which are supported on supporting rolls or intermediate rolls and supporting rolls, the working rolls and/or intermediate rolls being arranged in the rolling mill stand so as to be displaced axially with respect to one another, and each working and/or intermediate roll having a curved barrel contour which runs over the entire effective barrel length and can be described by a trigonometric function, and these two barrel contours completing one another in a complementary way, in the non-loaded state, solely in one specific relative axial position of the rolls of the pair of rolls, the supporting rolls having a complementary barrel contour, and a partial or full completion of the barrel contours of the supporting rolls and of the directly adjacent working rolls or intermediate rolls occurring in the non-loaded state, the barrel contour of the working rolls or the intermediate rolls or the supporting rolls having chamfers in at least one of the marginal regions of its longitudinal extent and in these marginal regions corrected barrel contours form which are obtained by subtracting any mathematical chamfer function from the contour function, characterized in that the pitch of the barrel contour and the pitch of the corrected barrel contour at the transition point from the barrel contour to the corrected barrel contour are identical.
- Rolling mill stand as claimed in Claim 1, characterized in that a full completion of the barrel contours of the supporting rolls and of the directly adjacent working rolls or intermediate rolls occurs in the nondisplaced state of the directly adjacent working rolls or intermediate rolls.
- Rolling mill stand as claimed in Claim 1, characterized in that an incomplete completion of the barrel contours of the supporting rolls and of the directly adjacent working rolls or intermediate rolls occurs in the nondisplaced state of the directly adjacent working rolls or intermediate rolls, on the condition that, in the case of a supporting roll radius RB(x) according to the formula
where
RB(x) is the supporting roll radius at the point x of the axial supporting roll extent,
R0 is the radius offset,
rB(x) is the contour at the point x of the axial supporting roll extent,
k is a correcting factor,
the correcting factor k being fixed in the interval 0 < k ≤ 2, excluding the value k=1. - Rolling mill stand as claimed in Claim 1, characterized in that the chamfer function is a trigonometric function.
- Rolling mill stand as claimed in Claim 1, characterized in that the chamfer function is a sine function.
- Rolling mill stand as claimed in Claim 1, characterized in that the chamfer function is a second order function.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200731046T SI2026916T1 (en) | 2006-06-14 | 2007-06-13 | Rolling stand for producing rolled strip or sheet |
PL07725995T PL2026916T3 (en) | 2006-06-14 | 2007-06-13 | Rolling stand for producing rolled strip or sheet |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT10212006 | 2006-06-14 | ||
PCT/EP2007/005218 WO2007144162A1 (en) | 2006-06-14 | 2007-06-13 | Rolling stand for producing rolled strip or sheet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2026916A1 EP2026916A1 (en) | 2009-02-25 |
EP2026916B1 true EP2026916B1 (en) | 2012-08-01 |
Family
ID=38430512
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07725995A Active EP2026916B1 (en) | 2006-06-14 | 2007-06-13 | Rolling stand for producing rolled strip or sheet |
EP07725994.3A Active EP2026915B2 (en) | 2006-06-14 | 2007-06-13 | Rolling stand for producing rolled strip or sheet |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07725994.3A Active EP2026915B2 (en) | 2006-06-14 | 2007-06-13 | Rolling stand for producing rolled strip or sheet |
Country Status (12)
Country | Link |
---|---|
US (2) | US8881569B2 (en) |
EP (2) | EP2026916B1 (en) |
CN (2) | CN101511498B (en) |
AT (1) | ATE488309T1 (en) |
BR (2) | BRPI0713145A2 (en) |
DE (1) | DE502007005682D1 (en) |
ES (2) | ES2392357T3 (en) |
PL (2) | PL2026916T3 (en) |
RU (2) | RU2442669C2 (en) |
SI (2) | SI2026916T1 (en) |
UA (2) | UA93090C2 (en) |
WO (2) | WO2007144162A1 (en) |
Families Citing this family (13)
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ES2392357T3 (en) | 2006-06-14 | 2012-12-10 | Siemens Vai Metals Technologies Gmbh | Lamination box for the manufacture of laminated bands or sheets |
DE102009021414A1 (en) * | 2008-12-17 | 2010-07-01 | Sms Siemag Aktiengesellschaft | Roll stand for rolling a particular metallic Guts |
DE102010014867A1 (en) * | 2009-04-17 | 2010-11-18 | Sms Siemag Ag | Method for providing at least one work roll for rolling a rolling stock |
AT509107B1 (en) | 2009-12-10 | 2011-09-15 | Siemens Vai Metals Tech Gmbh | ROLLING MILL FOR THE PRODUCTION OF ROLLING BAND |
US9021706B2 (en) * | 2010-02-01 | 2015-05-05 | The Timken Company | Unified rolling and bending process for roller bearing cages |
DE102010029598A1 (en) * | 2010-06-01 | 2011-12-01 | ACHENBACH BUSCHHüTTEN GMBH | Back-up roll and thus equipped roll stand |
CN102397874A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Method for prolonging service life of high-speed steel roller |
DE102012212532B4 (en) | 2012-07-18 | 2016-12-15 | Achenbach Buschhütten GmbH & Co. KG | Roll stand with contoured rolls |
US10226188B2 (en) | 2013-08-23 | 2019-03-12 | Covidien Lp | Systems and methods for monitoring blood pressure |
EP3108978B1 (en) * | 2015-06-26 | 2019-02-20 | DANIELI & C. OFFICINE MECCANICHE S.p.A. | Rolling stand and rolling method |
EP3124130A1 (en) * | 2015-07-28 | 2017-02-01 | Primetals Technologies Austria GmbH | Roller grinder for targeted prevention of quarter waves |
DE102016222987A1 (en) | 2016-11-22 | 2018-05-24 | Sms Group Gmbh | Method of grinding the contour of the bale of a roll |
CN113319128B (en) * | 2021-06-15 | 2021-12-14 | 北京科技大学 | Variable contact working roll and roll shape design method thereof |
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-
2007
- 2007-06-13 ES ES07725995T patent/ES2392357T3/en active Active
- 2007-06-13 WO PCT/EP2007/005218 patent/WO2007144162A1/en active Application Filing
- 2007-06-13 RU RU2009100918/02A patent/RU2442669C2/en active
- 2007-06-13 UA UAA200900146A patent/UA93090C2/en unknown
- 2007-06-13 EP EP07725995A patent/EP2026916B1/en active Active
- 2007-06-13 WO PCT/EP2007/005217 patent/WO2007144161A1/en active Application Filing
- 2007-06-13 BR BRPI0713145-3A patent/BRPI0713145A2/en not_active IP Right Cessation
- 2007-06-13 EP EP07725994.3A patent/EP2026915B2/en active Active
- 2007-06-13 UA UAA200815031A patent/UA92946C2/en unknown
- 2007-06-13 DE DE502007005682T patent/DE502007005682D1/en active Active
- 2007-06-13 SI SI200731046T patent/SI2026916T1/en unknown
- 2007-06-13 PL PL07725995T patent/PL2026916T3/en unknown
- 2007-06-13 US US12/304,952 patent/US8881569B2/en not_active Expired - Fee Related
- 2007-06-13 US US12/304,937 patent/US8413476B2/en not_active Expired - Fee Related
- 2007-06-13 RU RU2009100920/02A patent/RU2428268C2/en active
- 2007-06-13 SI SI200730509T patent/SI2026915T2/en unknown
- 2007-06-13 CN CN2007800218283A patent/CN101511498B/en active Active
- 2007-06-13 ES ES07725994.3T patent/ES2355948T5/en active Active
- 2007-06-13 CN CN2007800221746A patent/CN101466483B/en active Active
- 2007-06-13 PL PL07725994T patent/PL2026915T5/en unknown
- 2007-06-13 BR BRPI0713147-0A patent/BRPI0713147A2/en not_active IP Right Cessation
- 2007-06-13 AT AT07725994T patent/ATE488309T1/en active
Also Published As
Publication number | Publication date |
---|---|
ATE488309T1 (en) | 2010-12-15 |
EP2026915B2 (en) | 2017-09-27 |
PL2026916T3 (en) | 2012-12-31 |
SI2026915T1 (en) | 2011-03-31 |
RU2442669C2 (en) | 2012-02-20 |
WO2007144161A1 (en) | 2007-12-21 |
CN101466483B (en) | 2011-06-15 |
BRPI0713147A2 (en) | 2012-03-20 |
US8881569B2 (en) | 2014-11-11 |
UA92946C2 (en) | 2010-12-27 |
PL2026915T3 (en) | 2011-04-29 |
EP2026915B1 (en) | 2010-11-17 |
EP2026916A1 (en) | 2009-02-25 |
BRPI0713145A2 (en) | 2012-03-20 |
CN101466483A (en) | 2009-06-24 |
RU2009100918A (en) | 2010-07-20 |
ES2355948T5 (en) | 2018-02-14 |
ES2392357T3 (en) | 2012-12-10 |
US8413476B2 (en) | 2013-04-09 |
CN101511498A (en) | 2009-08-19 |
US20090314047A1 (en) | 2009-12-24 |
ES2355948T3 (en) | 2011-04-01 |
SI2026916T1 (en) | 2012-11-30 |
US20100031724A1 (en) | 2010-02-11 |
DE502007005682D1 (en) | 2010-12-30 |
CN101511498B (en) | 2011-06-15 |
EP2026915A1 (en) | 2009-02-25 |
UA93090C2 (en) | 2011-01-10 |
PL2026915T5 (en) | 2018-08-31 |
RU2428268C2 (en) | 2011-09-10 |
SI2026915T2 (en) | 2018-01-31 |
RU2009100920A (en) | 2010-07-20 |
WO2007144162A1 (en) | 2007-12-21 |
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