EP1100633B1 - Back-up or intermediate roller for producing a flat rolled product in a rolling mill - Google Patents
Back-up or intermediate roller for producing a flat rolled product in a rolling mill Download PDFInfo
- Publication number
- EP1100633B1 EP1100633B1 EP99947207A EP99947207A EP1100633B1 EP 1100633 B1 EP1100633 B1 EP 1100633B1 EP 99947207 A EP99947207 A EP 99947207A EP 99947207 A EP99947207 A EP 99947207A EP 1100633 B1 EP1100633 B1 EP 1100633B1
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- European Patent Office
- Prior art keywords
- roller
- roll
- pistons
- backup
- core
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000005096 rolling process Methods 0.000 title claims abstract description 27
- 239000012530 fluid Substances 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 239000010974 bronze Substances 0.000 claims description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 2
- 230000008093 supporting effect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000013000 roll bending Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
- B21B27/03—Sleeved rolls
- B21B27/05—Sleeved rolls with deflectable sleeves
Definitions
- the invention relates to a support or intermediate roll in rolling mills for rolling flat rolling stock, in particular strip, according to the preamble of claim 1.
- Profile-ground rollers are also disadvantageous because they reach the complex contours are required for the desired contours Geometry must be very precise. Add to that the rolling stock under certain Conditions at the edge and in the middle are deformed differently; per roll stand a roller with a defined contour is required, which is different for each stand.
- the German patent 34 14 242 is a roller with the generic type Features have been proposed.
- wedge-shaped rings which are supplied by Hydraulic fluid can be moved in the longitudinal direction of the roller.
- the wedge-shaped rings are with correspondingly wedge-shaped counter surfaces on the inner surface of the Paired roller shell and allow by applying a correspondingly high Hydraulic pressure to change the crown of the roller and thus changed Rolling forces and to adapt to different widths of the rolling stock.
- the wedges with relatively small slope tend to be between the roll core and To clamp the roll shell, i.e. there is a self-locking of these wedges, the is difficult to release under rolling force. Because the wedges in the previously known solution have the function of expanding the roll shell are very high hydraulic pressures required via the wedge surfaces in expansion forces for the roll shell are to be implemented.
- the object of the present invention is to improve a known one Jacket roller, an actuator which can be used in particular under rolling load for the profile and To create flatness control that avoids the disadvantages of the prior art and with the one by changing the rolled bale profile within wide limits Adaptation to the different conditions when rolling flat material is made possible.
- the edges can usually be widened in the known solutions in the proposed solution, the bales are made thinner in the middle area.
- the proposed solution is suitable for being adjusted under load because of a Widening of the roll shell as in the prior art described above Technology not done.
- By axially displacing the ring pistons that support the support bearings their position is changed in relation to the length of the roller, so that depending on Adjustment position and thus the supporting effect of the roll shell is a "hard” or a “Soft” execution of the roller results.
- the Ring piston with the support bearings each moved into their axial end positions where they can be fixed by fixed stops if necessary.
- the one end position in which the ring piston in Positioned in the middle of the roller results in the "hard” supported roller.
- the ring pistons move by means of pressure oil, which is introduced through the roller core via rotary connections.
- annular pistons are designed in the manner of telescopic pistons and in turn carry independently controllable axially displaceable ring pistons for example with a hard set roller for 2000 mm belt width Roller jacket supported on the roller core via ten or twelve support bearings, so are set so that the approximately equal distance between the support bearings in the middle between two supports is about 110 mm.
- the roll shell With appropriate dimensioning of the With a load of 4,000 t, the roll shell can bend 2 mm in the Bale center can be reached.
- another feature of the invention suggested that at least four, preferably ten to twelve support bearings at least two to four ring pistons symmetrically distributed over the length of the rollers are arranged, the distances between adjacent support bearings in the central region of the Roll smaller than the distances that are selected towards the edge are selected.
- the in Middle area of the roller grow smaller distances due to the higher load so towards the edge for larger amounts, creating a harmonious Deflection curve for the roller can be achieved.
- the adjustment range can be used to a greater extent than before was possible; because experience has shown that the transition to Work roll and the rolling stock a large part is lost. You go rough Assume that about 1/3 of the crown arrives at the roller on the rolling stock.
- the one with 1.3 mm achievable value of the invention is sufficient for most cases and is in connection with an effective roll bending a usable actuator, also with converted rolling stands.
- the Ring pistons arranged symmetrically directly on both sides of the roller center in their extended end position can be moved against each other at the end. It means that the ring pistons adjacent to the middle of the roller to reach their hydraulic fluid until the middle end position self-centering against each other.
- a double-conical support ring surface with a steep cone in cross-section is arranged which with corresponding conically flattened end parts of the annular piston in their middle end position correspond.
- This proposal makes it possible to clamp or loosen the system with a small axial travel, because of the Steep cone of approximately 10 ° or more, no self-locking can occur, as is the case with generic state of the art may be the case.
- the conical one End part of the ring piston is only used in the "hard” position, where the support the roller jacket in the middle area on conical surfaces that lie against each other and practically create a one-piece roller from the "built” jacket roller.
- the roll shell can consist of a the base part encompassing the ring piston and an exchangeable wear part be put together. It is both conceivable to have an outer jacket on the Base part to be fixed by shrinking or removable coatings on the Apply roller jacket.
- the sliding surfaces are in the bores nitrided and the ring pistons provided with bronze surfaces on the outside to the Improve sliding properties and minimize wear.
- Same thing Reason is proposed according to a further feature of the invention as Use hydraulic fluid lubricating oil; because on the one hand they are adjustable
- the annular piston required pressures relative to the pressures that the solution was after the state of the art requires, low (approx. 30 bar) and on the other hand promotes lubricating oil used the sliding properties.
- a backup roller according to the invention designated, from the roller core 2, the indicated in cylindrical roller bearings 3rd stored roll neck 4 and the rotationally connected to the roll core 2
- Roll shell 5 is made.
- the entrainment of the roll shell 5 with the roll core is ensured via the sleeve 6, which at 7 in a toothing indicated at 8 of the roller pin engages.
- the support roller 1 in the example shown is with a two-part roll shell 5, which consists of the base part 5a and replaceable wear part 5b is composed.
- the roller shell can of course, also be in one piece.
- Ring piston 9 claimed according to the invention and further arranged thereon Annular piston 10, both independently of one another axially displaceably, wherein in the upper half of the drawing, the ring pistons are moved so that there is a "hard” back-up roll results, and in the lower position shown the annular piston result in "soft" backup roller.
- the ring pistons 9 slide with their bronzed surfaces on the nitrided surfaces of jacket and Walzenkem 2 and are both opposite in a manner not shown sealed the roll core and the inner surface of the roll shell.
- Supply of pressure medium, in the present case lubricating oil via the one not shown
- the rotary union and the feed bores 11 and 12 are the annular pistons 9 slidable on each side of the roller center, which changes the position of the support bearings, which are denoted overall by A to K, can be changed.
- the in Back-up roller shown in the exemplary embodiment has a total of 10 support bearings A to K, which are each formed by annular projections of the annular pistons 9 and 10 and have cylindrical outer surfaces that are located on the cylindrical inside of the Put on the roller jacket 5 as a support.
- the support bearings E and F, the middle area the support roller 1 are immediately adjacent, are provided with a steep cone can be applied to a roof-shaped double cone 15, which on the inner surface of the Roll shell 5 is formed.
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- Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Metal Rolling (AREA)
- Crushing And Grinding (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
Description
Die Erfindung betrifft eine Stütz- oder Zwischenwalze in Walzwerken zum Walzen von flachem Walzgut, insbesondere Band, gemäß dem Oberbegriff des Patentanspruch 1.The invention relates to a support or intermediate roll in rolling mills for rolling flat rolling stock, in particular strip, according to the preamble of claim 1.
In neuzeitlichen Warmbandstrassen spielen die Profil- und Planheitssteuerung eine wichtige Rolle. Dabei ist die negative und positive Arbeitswalzenbiegung das "klassische" Stellglied, das auch unter Last einer Veränderung des Walzspaltes erlaubt. Da aber die Bedingungen, unter denen flaches Walzgut gewalzt wird, sehr unterschiedlich sind und sich Breite, Dicke, Profil und Werkstoff ebenso ändern wie die Walzgeschwindigkeit und die Walztemperatur, muß es bei den heute üblichen kleinen Losgrößen Profil- und Planheitssteuerungssysteme geben, die über einen großen Stellbereich verfügen. Aus diesem Grund sind in den letzten Jahren verstärkt weitere Stellglieder bei neuen Straßen zum Einsatz gekommen, von denen die Verwendung von profilgeschliffenen axial verschiebbaren Walzen und entgegeneinander verschwenkbare Walzen die bekanntesten sind.Profile and flatness control play a role in modern hot strip mills important role. The negative and positive work roll bending is that "classic" actuator that changes even under the load of the roll gap allowed. But since the conditions under which flat rolling stock is rolled, very much are different and the width, thickness, profile and material change just like that Rolling speed and the rolling temperature, it must be with today's small ones Lot sizes give profile and flatness control systems that are large Have a range. For this reason, there have been more in recent years Actuators have been used on new roads, one of which is the use of profile-ground axially displaceable rollers and against each other pivotable rollers are the best known.
Diese bekannten Systeme kommen zwar dem Verlangen der Kunden neuer Walzstrassen weitgehend entgegen, die außer der Arbeitswalzenbiegung mindestens ein weiteres Stellglied für die Profilbeeinflußung haben möchten, doch sind beide Systeme nicht geeignet, auch unter Last verstellt zu werden.These known systems come at the request of customers new Rolling lines largely opposed, at least apart from the work roll bend want to have another actuator for influencing the profile, but both are Systems not suitable to be adjusted even under load.
Profilgeschliffene Walzen sind darüber hinaus nachteilig, weil zum Erreichen der gewünschten Konturen eine aufwendige Schleifbearbeitung nötig ist, die zudem in der Geometrie sehr präzise sein muß. Hinzu kommt, dass das Walzgut unter bestimmten Bedingungen am Rand und in der Mitte unterschiedlich verformt wird; pro Walzgerüst ist eine Walze mit definierter Kontur nötig, die bei jedem Gerüst unterschiedlich ist. Profile-ground rollers are also disadvantageous because they reach the complex contours are required for the desired contours Geometry must be very precise. Add to that the rolling stock under certain Conditions at the edge and in the middle are deformed differently; per roll stand a roller with a defined contour is required, which is different for each stand.
Beim Schränken der Walzen, dem sogenannten "Crossing", ergibt sich der Nachteil, dass der Schränkungswinkel der Walzen besondere Maßnahmen für eine gleichförmige Winkelgeschwindigkeit verlangt, die den Einsatz normaler Zapfenkreuzgelenkwellen zum Walzenantrieb ausschließt. Außerdem erzeugt das Schränken sehr hohe Axialkräfte, die bis 10 % der Radialwalzkraft erreichen können. Hinzu kommen Probleme bei der Walzgutführung; es kommt zu Verdrehungen des Walzgutes.When crossing the rollers, the so-called "crossing", there is the disadvantage that the set angle of the rollers is special for a uniform angular velocity requires the use of normal universal joint shaft to the roller drive. In addition, the closings very much high axial forces that can reach up to 10% of the radial rolling force. Add to that Problems with rolling stock management; the rolling stock is twisted.
Durch die deutsche Patentschrift 34 14 242 ist eine Walze mit den gattungsgemäßen Merkmalen vorgeschlagen worden. Bei der bekannten Mantelwalze werden zwischen Walzenkern und Walzenmantel keilförmige Ringe eingesetzt, die durch Zufuhr von Druckflüssigkeit in Längsrichtung der Walze verschiebbar sind. Die keilförmigen Ringe sind mit entsprechend keilförmig gestalteten Gegenflächen an der Innenoberfläche des Walzenmantels gepaart und gestatten durch Aufbringen eines entsprechend hohen Hydraulikdruckes die Balligkeit der Walze zu verändern und diese somit an veränderte Walzkräfte und an verschiedene Breiten des Walzgutes anzupassen. Die Keile mit relativ geringer Steigung neigen allerdings dazu, sich zwischen Walzenkem und Walzenmantel festzuklemmen, d.h. es entsteht eine Selbsthemmung dieser Keile, die sich unter Walzkraft nur schwer lösen läßt. Da die Keile bei der vorbekannten Lösung die Funktion haben, den Walzenmantel aufzuweiten, sind sehr hohe Hydraulikdrücke erforderlich, die über die Keilflächen in Aufweitekräfte für den Walzenmantel umzusetzen sind.The German patent 34 14 242 is a roller with the generic type Features have been proposed. In the known jacket roller between Roll core and roll shell used wedge-shaped rings, which are supplied by Hydraulic fluid can be moved in the longitudinal direction of the roller. The wedge-shaped rings are with correspondingly wedge-shaped counter surfaces on the inner surface of the Paired roller shell and allow by applying a correspondingly high Hydraulic pressure to change the crown of the roller and thus changed Rolling forces and to adapt to different widths of the rolling stock. The wedges with relatively small slope, however, tend to be between the roll core and To clamp the roll shell, i.e. there is a self-locking of these wedges, the is difficult to release under rolling force. Because the wedges in the previously known solution have the function of expanding the roll shell are very high hydraulic pressures required via the wedge surfaces in expansion forces for the roll shell are to be implemented.
Aus den JP-A-4-182015 und 197505 sind jeweils Walzen bekannt, bei denen gegenüber dem Walzenkern und der Innenseite des Walzenmantels abgedichtete, als Ringkörper ausgebildete, Stützkörper vorgesehen sind, die voneinander beabstandete Stützlager aufweisen, die gegen die Innenoberfläche des Walzenmantels anlegbar sind.From JP-A-4-182015 and 197505, rolls are known in which sealed against the roll core and the inside of the roll shell, as Ring-shaped support bodies are provided, which are spaced apart Have support bearings that can be placed against the inner surface of the roll shell are.
Aufgabe der vorliegenden Erfindung ist es, durch Verbesserung einer bekannten Mantelwalze, ein insbesondere unter Walzlast einsetzbares Stellglied für die Profil- und Planheitsregelung zu schaffen, das die Nachteile des Standes der Technik vermeidet und mit dem durch Veränderung des Walzballenprofils in weiten Grenzen eine Anpassung an die unterschiedlichen Bedingungen beim Walzen von Flachmaterial ermöglicht wird. The object of the present invention is to improve a known one Jacket roller, an actuator which can be used in particular under rolling load for the profile and To create flatness control that avoids the disadvantages of the prior art and with the one by changing the rolled bale profile within wide limits Adaptation to the different conditions when rolling flat material is made possible.
Gelöst wird diese Aufgabe erfindungsgemäß mit den Merkmalen des Patentanspruchs 1.This object is achieved according to the invention with the features of the patent claim 1.
Während bei den bekannten Lösungen meistens die Ränder aufgeweitet werden, kann bei der vorgeschlagenen Lösung der Ballen im Mittenbereich dünner gemacht werden.While the edges can usually be widened in the known solutions in the proposed solution, the bales are made thinner in the middle area.
Die vorgeschlagene Lösung ist geeignet, unter Last verstellt zu werden, weil eine Aufweitung des Walzenmantels wie beim vorstehend beschriebenen Stand der Technik nicht erfolgt. Durch Axialverschieben der die Stützlager tragenden Ringkolben wird deren Position bezogen auf die Länge der Walze verändert, so dass sich je nach Verstellposition und damit Abstützwirkung der Walzenmantels eine "harte" bzw. eine "weiche" Ausführung der Walze ergibt. In der einfachsten denkbaren Form werden die Ringkolben mit den Stützlagern jeweils in ihre axialen Endpositionen gefahren, wo sie ggf. durch Festanschläge fixierbar sind. Die eine Endposition, in der die Ringkolben im Bereich der Walzenmitte positioniert sind, ergibt die "harte" abgestützte Walze. Die Endposition, bei der die Ringkolben in der Nähe des Randbereiches der Walze positioniert sind, ergibt die "weiche" Walze. Die Bewegung der Ringkolben erfolgt mittels Drucköl, das über Drehverbindungen durch den Walzenkem eingeleitet wird.The proposed solution is suitable for being adjusted under load because of a Widening of the roll shell as in the prior art described above Technology not done. By axially displacing the ring pistons that support the support bearings their position is changed in relation to the length of the roller, so that depending on Adjustment position and thus the supporting effect of the roll shell is a "hard" or a "Soft" execution of the roller results. In the simplest possible form, the Ring piston with the support bearings each moved into their axial end positions where they can be fixed by fixed stops if necessary. The one end position in which the ring piston in Positioned in the middle of the roller results in the "hard" supported roller. The End position at which the ring piston is close to the edge area of the roller positioned, the "soft" roller results. The ring pistons move by means of pressure oil, which is introduced through the roller core via rotary connections.
Dadurch, dass die Ringkolben in der Art von Teleskopkolben ausgebildet sind und ihrerseits unabhängig steuerbare axialverschiebbare Ringkolben tragen, wird beispielsweise bei einer hart eingestellten Walze für 2000 mm Bandbreite der Walzenmantel über zehn oder zwölf Stützlager auf dem Walzenkern abgestützt, die so eingestellt sind, dass der in etwa gleiche Abstand der Stützlager in der Mitte zwischen zwei Auflagern etwa 110 mm beträgt. Bei entsprechender Dimensionierung des Walzenmantels kann bei einer Last von 4.000 t eine Durchbiegung von 2 mm in der Ballenmitte erreicht werden. The fact that the annular pistons are designed in the manner of telescopic pistons and in turn carry independently controllable axially displaceable ring pistons for example with a hard set roller for 2000 mm belt width Roller jacket supported on the roller core via ten or twelve support bearings, so are set so that the approximately equal distance between the support bearings in the middle between two supports is about 110 mm. With appropriate dimensioning of the With a load of 4,000 t, the roll shell can bend 2 mm in the Bale center can be reached.
In der "weichen" Stellung der gleichen Walze wird zwischen den Stützlagern eine Stützweite von etwa 1350 mm eingestellt. Bei entsprechender Dimensionierung beträgt die Durchbiegung in der Ballenmitte der Walze bei 4.000 t Last ungefähr 6 mm. An diesem Beispiel wird erkennbar, daß die unterschiedlichen Durchbiegungen der Walze bei gleicher Last und unterschiedlicher Stellung der Ringkolben die Einstellung von zumindest zwei unterschiedlichen Crowns ermöglichen, wobei die Feinregelung über die bisher verwendete Arbeitswalzenbiegung erfolgen kann. Die Erweiterung der Erfindung mit unabhängig steuerbaren Ringkolben, die auf den erstgenannten Ringkolben axial verschiebbar sind, ermöglicht eine beliebige Anzahl von Zwischenpositionen, in denen auch die Ringkolben und damit die Stützlager unsymmetrisch zur Walzenmitte eingestellt werden können. Zu diesem Zweck werden Mengenregler für die zugeführte Ölmenge eingesetzt, die das Anfahren einer beliebigen Zwischenposition für den Ringkolben ermöglichen.In the "soft" position of the same roller one is between the support bearings Span of about 1350 mm set. With appropriate dimensioning the deflection in the middle of the roll of the roller at a load of 4,000 t is approximately 6 mm. On This example shows that the different deflections of the roller with the same load and different position of the ring piston the setting of enable at least two different crowns, the fine control over the work roll bending previously used can take place. The extension of the Invention with independently controllable annular pistons based on the former Ring piston are axially displaceable, allows any number of Intermediate positions, in which the ring piston and thus the support bearing can be set asymmetrically to the center of the roller. For this purpose Flow controller used for the amount of oil supplied, which is the start of a Allow any intermediate position for the ring piston.
FEM - Untersuchungen haben ergeben, daß die Walzkraftverteilung auf der Arbeitswalze vereinfacht einer Streckenlast entspricht, daß die Stützkraftverteilung auf der Stützwalze jedoch einen anderen Verlauf hat. Die Stützkraft steigt vom Rand des Bandes ausgehend zur Mitte hin an und erreicht bei ungefähr 1/3 der Bandbreite ihr Maximum. Das Maximum wird bis ungefähr 2/3 der Bandbreite beibehalten und fällt dann wieder auf Null ab. Die Untersuchungen zeigen, daß 2/3 der Belastungen im Mittelabschnitt der Stützwalze aufgenommen werden müssen.FEM investigations have shown that the rolling force distribution on the Work roll simplifies a line load that corresponds to the support force distribution the backup roller has a different course. The support force increases from the edge of the Band starts towards the middle and reaches about 1/3 of the bandwidth Maximum. The maximum is maintained until about 2/3 of the bandwidth and falls then back down to zero. The studies show that 2/3 of the loads in the Middle section of the backup roller must be included.
Entsprechend dieser Erkenntnis wird nach einem weiteren Merkmal der Erfindung vorgeschlagen, daß mindestens vier, vorzugsweise zehn bis zwölf Stützlager an mindestens zwei bis vier Ringkolben über die Länge der Walzen symmetrisch verteilt angeordnet sind, wobei die Abstände benachbarter Stützlager im mittleren Bereich der Walze kleiner als die zum Rand hin größer werdenden Abstände gewählt sind. Die im Mittelbereich der Walze wegen der höheren Belastung kleineren Abstände wachsen also zum Rand hin auf größere Beträge an, wodurch eine harmonische Durchbiegungskurve für die Walze erzielt werden kann.According to this finding, another feature of the invention suggested that at least four, preferably ten to twelve support bearings at least two to four ring pistons symmetrically distributed over the length of the rollers are arranged, the distances between adjacent support bearings in the central region of the Roll smaller than the distances that are selected towards the edge are selected. The in Middle area of the roller grow smaller distances due to the higher load so towards the edge for larger amounts, creating a harmonious Deflection curve for the roller can be achieved.
Auf diese Weise läßt sich der Stellbereich in größerem Maß ausnutzen als das bisher möglich war; denn erfahrungsgemäß geht man davon aus, daß beim Übergang auf die Arbeitswalze und das Walzgut ein großer Teil verloren geht. Man geht überschlägig davon aus, daß etwa 1/3 des Crowns an der Stützwalze am Walzgut ankommt. Der mit der Erfindung erreichbare Wert von ca. 1,3 mm reicht für die meisten Fälle aus und ist in Verbindung mit einer effektiven Walzenbiegung ein brauchbares Stellglied, auch bei umgebauten Walzgerüsten.In this way, the adjustment range can be used to a greater extent than before was possible; because experience has shown that the transition to Work roll and the rolling stock a large part is lost. You go rough Assume that about 1/3 of the crown arrives at the roller on the rolling stock. The one with 1.3 mm achievable value of the invention is sufficient for most cases and is in connection with an effective roll bending a usable actuator, also with converted rolling stands.
Berechnungen der Durchbiegungswerte der erfindungsgemäßen Walze zeigen außerdem, daß die Walze in der harten Stellung nur 0,2 mm mehr Durchbiegung aufweist als eine massiv ausgeführte Walze. Das bedeutet, daß auch die erfindungsgemäß aus Kernwalze und Mantel gebaute Stützwalze eine noch ausreichend gute Steifigkeit besitzt.Calculations of the deflection values of the roller according to the invention show also that the roller in the hard position only 0.2 mm more deflection has a solid roller. That means that also A back-up roll built according to the invention from core roll and jacket has sufficient rigidity.
In einer günstigen Ausgestaltung der Erfindung wird vorgeschlagen, daß die symmetrisch unmittelbar beidseitig der Walzenmitte angeordneten Ringkolben in ihrer ausgefahrenen Endstellung stimseitig gegeneinander fahrbar sind. Das bedeutet, daß die im Bereich der Walzenmitte benachbarten Ringkolben zum Erreichen ihrer mittleren Endstellung solange mit Hydraulikflüssigkeit beaufschlagt werden, bis sie sich selbstzentrierend gegeneinander legen.In a favorable embodiment of the invention it is proposed that the Ring pistons arranged symmetrically directly on both sides of the roller center in their extended end position can be moved against each other at the end. It means that the ring pistons adjacent to the middle of the roller to reach their hydraulic fluid until the middle end position self-centering against each other.
In einer besonders günstigen Ausgestaltung der Erfindung ist vorgesehen, daß in der Walzenmitte auf dem Walzenkern und oder auf der Innenseite des Walzenmantels eine doppelkonische Stützringfläche mit im Querschnitt dachförmigem Steilkonus angeordnet ist, die mit entsprechend konisch abgeflachten Endteilen der Ringkolben in deren mittlerer Endstellung korrespondieren. Durch diesen Vorschlag wird es möglich, mit einen kleinen Axialweg das System zu klemmen oder zu lösen, wobei wegen des Steilkegels von ca. 10° oder mehr keine Selbsthemmung auftreten kann, wie dies beim gattungsbildenden Stand der Technik der Fall sein kann. Der konisch ausgebildete Endteil des Ringkolbens kommt nur bei der "harten" Stellung zum Einsatz, wo die aneinanderliegenden Konusflächen den Walzenmantel im Mittenbereich unterstützen und aus der "gebauten" Mantel - Walze praktisch eine einteilige Walze schaffen.In a particularly favorable embodiment of the invention it is provided that in the Roll center on the roll core and or on the inside of the roll shell a double-conical support ring surface with a steep cone in cross-section is arranged which with corresponding conically flattened end parts of the annular piston in their middle end position correspond. This proposal makes it possible to clamp or loosen the system with a small axial travel, because of the Steep cone of approximately 10 ° or more, no self-locking can occur, as is the case with generic state of the art may be the case. The conical one End part of the ring piston is only used in the "hard" position, where the support the roller jacket in the middle area on conical surfaces that lie against each other and practically create a one-piece roller from the "built" jacket roller.
Natürlich ist es auch bei dieser Lösung denkbar durch Erhöhung des Hydraulikdruckes des Ringkolbens die Konuspaarung zwischen Walzenmantel und Ringkolben zum Aufweiten des Mantels in der Mitte zu verwenden und auf diese Weise in der harten Stellung die Durchbiegung des Mantels infolge Walzkraft etwas zu kompensieren. Hauptsinn der doppelkonischen Stützringfläche ist aber die Abstützung des mittleren Walzenmantels in der "harten" Stellung der Basis - Ringkolben, also in der Mitte der Walze.Of course, this solution is also conceivable by increasing the hydraulic pressure of the annular piston, the cone pairing between the roller shell and the annular piston Widen the coat in the middle to use and this way in the hard Position to compensate for the deflection of the jacket due to the rolling force. The main meaning of the double-conical support ring surface is the support of the middle one Roller jacket in the "hard" position of the base ring piston, ie in the middle of the Roller.
Der Walzenmantel kann nach einer weiteren Ausgestaltung der Erfindung aus einem die Ringkolben umgreifenden Basisteil und einem austauschbaren Verschleißteil zusammengesetzt werden. Dabei ist es sowohl denkbar, einen Außenmantel auf dem Basisteil durch Schrumpfen zu befestigen oder entfernbare Beschichtungen auf den Walzenmantel aufzubringen.According to a further embodiment of the invention, the roll shell can consist of a the base part encompassing the ring piston and an exchangeable wear part be put together. It is both conceivable to have an outer jacket on the Base part to be fixed by shrinking or removable coatings on the Apply roller jacket.
In einer günstigen Ausgestaltung der Erfindung sind die Gleitflächen in den Bohrungen nitriert und die Ringkolben außen mit Bronzeoberflächen versehen, um die Gleiteigenschaften zu verbessern und den Verschleiß zu minimieren. Aus gleichem Grund wird nach einem weiteren Merkmal der Erfindung vorgeschlagen, als Hydraulikflüssigkeit Schmieröl zu verwenden; denn einerseits sind die zum Verstellen der Ringkolben erforderlichen Drücke relativ zu den Drücken, die die Lösung nach dem Stand der Technik erfordert, gering (ca. 30 bar) und andererseits fördert das verwendete Schmieröl die Gleiteigenschaften.In a favorable embodiment of the invention, the sliding surfaces are in the bores nitrided and the ring pistons provided with bronze surfaces on the outside to the Improve sliding properties and minimize wear. Same thing Reason is proposed according to a further feature of the invention as Use hydraulic fluid lubricating oil; because on the one hand they are adjustable The annular piston required pressures relative to the pressures that the solution was after the state of the art requires, low (approx. 30 bar) and on the other hand promotes lubricating oil used the sliding properties.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben.An embodiment of the invention is shown in the drawing and will described below.
In der einzigen Zeichnungsfigur ist mit 1 eine erfindungsgemäße Stützwalze
bezeichnet, die aus dem Walzenkern 2, den in angedeuteten Zylinderrollenlagern 3
gelagerten Walzenzapfen 4 und dem mit dem Walzenkern 2 drehfest verbundenen
Walzenmantel 5 besteht. Die Mitnahme des Walzenmantels 5 mit dem Walzenkern
wird über die Hülse 6 gewährleistet, die bei 7 in eine bei 8 angedeutete Verzahnung
des Walzenzapfens eingreift. Die Stützwalze 1 im dargestellten Beispiel ist mit einem
zweigeteilten Walzenmantel 5 versehen, der aus dem Basisteil 5a und dem
austauschbaren Verschleißteil 5b zusammengesetzt ist. Der Walzenmantel kann
selbstverständlich auch einstückig sein. Zwischen dem Walzenmantel, der im
folgenden vereinfachend mit 5 bezeichnet wird, und dem Walzenkem 2 sind die
erfindungsgemäß beanspruchten Ringkolben 9 und darauf angeordnete weitere
Ringkolben 10, beide unabhängig voneinander axial verschiebbar angeordnet, wobei
in der oberen Zeichnungshälfte die Ringkolben so verschoben sind, daß sich eine
"harte" Stützwalze ergibt, und in der unteren dargestellten Stellung die Ringkolben eine
"weiche" Stützwalze ergeben.In the single drawing figure with 1 is a backup roller according to the invention
designated, from the
Die Ringkolben 9 gleiten mit ihren bronzierten Oberflächen auf den nitrierten Flächen
von Mantel und Walzenkem 2 und sind in nicht dargestellter Weise sowohl gegenüber
dem Walzenkern als auch der Innenoberfläche des Walzenmantels abgedichtet. Durch
Zuführung von Druckmittel, im vorliegenden Fall Schmieröl, über die nicht dargestellte
Drehdurchführung und die Zufuhrbohrungen 11 bzw. 12 sind die Ringkolben 9 auf
jeder Seite der Walzenmitte verschiebbar, wodurch sich die Position der Stützlager,
die insgesamt mit A bis K bezeichnet sind, verändern läßt. In gleichem Maße läßt sich
durch Beaufschlagung mit Drucköl die Einstellung der Ringkolben 10, die gleitend auf
den Ringkolben 9 geführt sind, und die ebenfalls gegenüber der Innenoberfläche des
Walzenmantels 5 abgedichtet sind, verändern, so daß auch deren Stützlager
hinsichtlich ihrer Position über die Länge der Stützwalze 1 veränderbar sind. Die im
Ausführungsbeispiel dargestellte Stützwalze weist insgesamt 10 Stützlager A bis K auf,
die jeweils durch ringförmige Vorsprünge der Ringkolben 9 bzw. 10 gebildet werden
und zylindrischen Außenflächen aufweisen, die sich an die zylindrische Innenseite des
Walzenmantels 5 abstützend anlegen. Die Stützlager E und F, die dem Mittenbereich
der Stützwalze 1 unmittelbar benachbart sind, sind mit einem Steilkonus versehen, der
an einen dachförmigen Doppelkonus 15 anlegbar ist, der an der Innenoberfläche des
Walzenmantels 5 ausgebildet ist. In der Endstellung der verschobenen Ringkolben 9,
die in der oberen Zeichnungshälfte dargestellt ist, liegen die konusförmigen Endteile
der Ringkolben 9 an den Doppelkonusflächen 15 an und unterstützen somit die "harte"
Version der Stützwalze 1, indem der mittlere Bereich der Stützwalze 1 unmittelbar
gegen den Walzenkern 2 abgestützt ist. In der unteren Zeichnungshälfte sind die
Ringkolben 9 soweit zurückgezogen, daß der Doppelkonus 15 frei wird und die
Stützwalze 1 sich somit "weich" verformen kann.The
Claims (7)
- Backup or intermediate roller in rolling mills for rolling flat stock, especially strip, consisting of a cylindrical roller core (2) and a tubular roller casing (5) joined to it in such a way that it is unable to turn and enclosing it coaxially; between which casing and the roller core are positioned support elements which can be moved axially by hydraulic power and which hold the roller casing (5) against the roller core (2), the support elements having at least two annular pistons (9) which are positioned symmetrically with the roller centre and are sealed off from the roller core (2) and the inner side of the roller casing (5), and consisting of a number of ring-shaped support bearings (A to K) positioned on the outer circumference of the pistons, spaced apart from each other along the roller (1), against which bearings can be placed the roller casing (5),
characterised in that
the annular pistons (9) are made in the form of telescopic pistons, and themselves carry annular pistons (10) which can be controlled independently and on which there are additional ring-shaped support bearings (A to K), the spacing between the support bearings (A to K) being adjustable in relation to the support bearings (A to K) on other annular pistons (9, 10) and with regard to their positioning in relation to the length of the roll (1) by moving the annular pistons (9, 10). - Backup or intermediate roller as in Claim 1
characterised in that
at least four, and preferably 10 to 12 support bearings (A to K) are positioned, symmetrically distributed, on at least two to four ring pistons (9, 10) along the length of the roller (1), the distances between adjacent support bearings (A to K) being set to be smaller in the central area of the roller (1) and becoming greater towards the edge. - Backup or intermediate roller as in Claim 1
characterised in that
the annular pistons (9) arranged symmetrically at both sides of the centre of the roller can be moved, when in their extended final positions, towards each other with their front sides facing each other. - Backup or intermediate roller as in Claim 1
characterised in that
there is, in the centre of the roller on the roller core (2) and/or on the inner surface of the roller casing (5), a double-conical backup ring surface (15) with a steep-angled cone that is roof-shaped in cross-section, and which corresponds with the end areas of the annular pistons (9) - when they are in their central final position - which are bevelled in a matching conical shape. - Backup or intermediate roller as in Claim 1
characterised in that
the roller casing (5) consists of a base part (5a) corresponding with the annular pistons (9, 10), and a removable wearing part (5b). - Backup or intermediate roller as in Claim 1
characterised in that
the slide faces of the bores (9, 10) are nitration-hardened, and the annular pistons have bronze outer surfaces. - Backup or intermediate roller as in Claim 1
characterised in that
the hydraulic fluid used is lubricating oil.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19835089 | 1998-07-24 | ||
| DE19835089A DE19835089C2 (en) | 1998-07-24 | 1998-07-24 | Back-up or intermediate roll in rolling mills for rolling flat rolling stock |
| PCT/DE1999/002176 WO2000006315A1 (en) | 1998-07-24 | 1999-07-12 | Back-up or intermediate roller for producing a flat rolled product in a rolling mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1100633A1 EP1100633A1 (en) | 2001-05-23 |
| EP1100633B1 true EP1100633B1 (en) | 2002-12-11 |
Family
ID=7876352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99947207A Expired - Lifetime EP1100633B1 (en) | 1998-07-24 | 1999-07-12 | Back-up or intermediate roller for producing a flat rolled product in a rolling mill |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US6408668B1 (en) |
| EP (1) | EP1100633B1 (en) |
| JP (1) | JP4430823B2 (en) |
| AT (1) | ATE229382T1 (en) |
| AU (1) | AU6077399A (en) |
| BR (1) | BR9912363A (en) |
| CA (1) | CA2338495C (en) |
| DE (2) | DE19835089C2 (en) |
| ES (1) | ES2184503T3 (en) |
| RU (1) | RU2220014C2 (en) |
| WO (1) | WO2000006315A1 (en) |
Families Citing this family (4)
| 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 |
| US7637132B2 (en) * | 2006-02-06 | 2009-12-29 | Butech Bliss | Work roll scraper for roller levelers |
| DE102007030408B4 (en) * | 2007-06-29 | 2019-05-29 | Kocks Technik Gmbh & Co. Kg | Device for a roll stand for rolling rod or tubular material with a roll holder and a roller |
| CN107866351A (en) * | 2017-11-30 | 2018-04-03 | 深圳华美板材有限公司 | A kind of applicator roll |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4407151A (en) * | 1980-07-17 | 1983-10-04 | Davey-Loewy Limited | Rolling mill |
| IT1163408B (en) * | 1983-05-27 | 1987-04-08 | Innocenti Santeustacchio Spa | CYLINDER FOR TAPES ROLLING CAGES, IN PARTICULAR AS A SUPPORT CYLINDER IN FOURTH CAGES |
| US4599770A (en) * | 1984-04-06 | 1986-07-15 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Roll for rolling mill |
| DE3414242C1 (en) * | 1984-04-14 | 1985-11-07 | Ishikawajima-Harima Jukogyo K.K., Tokio/Tokyo | Roll for a roll stand |
| JPS63220911A (en) * | 1987-03-06 | 1988-09-14 | Hitachi Ltd | Rolling mill |
| US5001820A (en) * | 1990-06-27 | 1991-03-26 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Roll for rolling mill |
| JP2870185B2 (en) * | 1990-11-15 | 1999-03-10 | 石川島播磨重工業株式会社 | Roll for rolling mill |
| JPH04197505A (en) * | 1990-11-28 | 1992-07-17 | Ishikawajima Harima Heavy Ind Co Ltd | Roll |
| DE19511187A1 (en) * | 1995-03-27 | 1996-10-02 | Yuli Dipl Ing Liu | Appts. for varying roller gap shape in strip rolling mill |
-
1998
- 1998-07-24 DE DE19835089A patent/DE19835089C2/en not_active Expired - Fee Related
-
1999
- 1999-07-12 AT AT99947207T patent/ATE229382T1/en active
- 1999-07-12 DE DE59903770T patent/DE59903770D1/en not_active Expired - Lifetime
- 1999-07-12 RU RU2001105201/02A patent/RU2220014C2/en not_active IP Right Cessation
- 1999-07-12 US US09/744,339 patent/US6408668B1/en not_active Expired - Lifetime
- 1999-07-12 EP EP99947207A patent/EP1100633B1/en not_active Expired - Lifetime
- 1999-07-12 CA CA002338495A patent/CA2338495C/en not_active Expired - Fee Related
- 1999-07-12 WO PCT/DE1999/002176 patent/WO2000006315A1/en active IP Right Grant
- 1999-07-12 JP JP2000562156A patent/JP4430823B2/en not_active Expired - Fee Related
- 1999-07-12 AU AU60773/99A patent/AU6077399A/en not_active Abandoned
- 1999-07-12 BR BR9912363-0A patent/BR9912363A/en not_active IP Right Cessation
- 1999-07-12 ES ES99947207T patent/ES2184503T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2338495C (en) | 2008-04-29 |
| RU2220014C2 (en) | 2003-12-27 |
| ES2184503T3 (en) | 2003-04-01 |
| AU6077399A (en) | 2000-02-21 |
| BR9912363A (en) | 2001-04-17 |
| CA2338495A1 (en) | 2000-02-10 |
| DE19835089A1 (en) | 2000-02-03 |
| JP4430823B2 (en) | 2010-03-10 |
| DE59903770D1 (en) | 2003-01-23 |
| WO2000006315A1 (en) | 2000-02-10 |
| EP1100633A1 (en) | 2001-05-23 |
| DE19835089C2 (en) | 2000-08-24 |
| ATE229382T1 (en) | 2002-12-15 |
| US6408668B1 (en) | 2002-06-25 |
| JP2002521205A (en) | 2002-07-16 |
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