EP0776710B1 - Device for influencing the profile section of a rolled strip - Google Patents

Device for influencing the profile section of a rolled strip Download PDF

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Publication number
EP0776710B1
EP0776710B1 EP96118147A EP96118147A EP0776710B1 EP 0776710 B1 EP0776710 B1 EP 0776710B1 EP 96118147 A EP96118147 A EP 96118147A EP 96118147 A EP96118147 A EP 96118147A EP 0776710 B1 EP0776710 B1 EP 0776710B1
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EP
European Patent Office
Prior art keywords
spray
strip
spray bars
bars
width
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96118147A
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German (de)
French (fr)
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EP0776710A1 (en
Inventor
Jürgen Seidel
Rüdiger Holz
Klaus Klamma
Hans-Joachim Pölking
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SMS Siemag AG
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SMS Demag AG
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Publication of EP0776710A1 publication Critical patent/EP0776710A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • 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
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • 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
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally

Definitions

  • the invention relates to a device for influencing the profile of in at least one stand of rolled strip with the stand associated with it Adjusting, bending and possibly shifting devices and the rollers assigned spray bars for optionally controlled spraying of cooling and / or lubricant and associated with the two end regions of the rollers further spray bars and a control device.
  • the strip edge areas face the Belt areas different loads on the constancy of the Adversely affect the thickness of the tape across its width.
  • the thermal crowning and the stronger one Roller wear in the belt edge areas one opposite the belt center would cause thicker edge profile is essentially by the Material cross flow behavior in the direction of the width of the material shows a sharp decrease in thickness Edge area caused.
  • the additional wear in the edge area is at Cold rolling is low and the thermal crowning is largely due to cooling of the rolls in the middle area balanced, so that mainly due to material flow behavior caused thinner strip edge profiles towards the center of the strip arise, the so-called edge drops.
  • the size should edge drops on rolled strips. It is proposed that further spray bars outside the areas occupied by the strip to be rolled of the rollers are arranged, displacement drives the corresponding Adjustment of the other spray bars outside of the roller area occupied by the belt guarantee. Within the area of the rolls occupied by the belt Additional spray bars are provided, by means of which the roller contour is heated should be influenced. In the strip edge area of the rollers, on the one hand heated and cooled on the other hand, creating extreme tension in this area of the rollers occur, which in addition to the usual high wear in the Band edge area cause even greater wear. An optimal reduction edge drop is not possible, especially since cooling down to the respective Bale end is omitted.
  • EP-A-0 542 640 discloses a cooling device for the rolls of one Hot rolling mill.
  • Movable nozzles or spray bars are used to cool the rollers proposed that allow a variable influence on the cooling effect without that the individual nozzles have to be switched off.
  • DE-A-3 614 487 discloses a device for roll temperature control in which outside the areas of the rolls occupied by the rolled strip, a heater and within the areas occupied by the rolled strip that are to be cooled. By a sharp boundary that coincides with the band edge ensures that about the same heat conditions on both sides of the belt edges is achieved. It is not possible to remove edge drops.
  • the object of the invention is to better minimize the edge drops or to be completely eliminated without significantly reducing the belt tension distribution to adversely affect.
  • Spray bars can also be applied to the roller bales in the belt edge areas cool more if necessary.
  • the roll diameter in the band edge area are reduced by the additional cooling.
  • the extension of the Effective range of the other spray bars from the respective bale end over the this facing band edge also ensures that the through Heat conduction to the bale ends of the rollers is better dissipated and thus an optimal temperature drop in the axial direction of the rolls in Strip edge area is obtained, which in turn enlarges the roll gap in the band edge area. But that is what the Material cross flow behavior counteracted edge drop counteracted.
  • the further spray bars that can be assigned to the rollers are usually only the Assigned work rolls, because of this through the rolling work and the contact with the Rolling material are subjected to the greatest thermal stress.
  • spray medium which a different temperature than the spray medium for the spray bars, preferably has a lower temperature, e.g. a common one Tank provided for the spray medium and the temperature of the spray medium on the temperature for the spray bars can be set, and the spray medium for the further spray bar can be cooled by a controllable cooler.
  • a common one Tank provided for the spray medium and the temperature of the spray medium on the temperature for the spray bars can be set, and the spray medium for the further spray bar can be cooled by a controllable cooler.
  • control device that functions as a forward control works and at the strip inlet side measured and / or specified strip data are used, stored or calculated, optimal values of Select spraying widths, spraying agent intensity and spraying agent temperature and for appropriate regulation.
  • a backward regulation is also possible, whereby a combination of the forward and reverse control is also conceivable.
  • the measurement results for the reverse control can be used to determine the optimal values of spray widths, spray medium intensity and spray medium temperature and / or for optimizing the control device of the forward control be used.
  • a memory optimal values for the spray widths, spray medium intensities and / or to select coolant temperatures a computer, the corresponding Functions for the optimal values of the spray widths, spray agent intensities and / or coolant temperatures are available with the help of these Measurement results the optimal values for the actuators of the control device calculate.
  • FIG. 1 shows a roll stand 1 for rolling strip 2, on the latter
  • Inlet side spray bars 3, 3a are provided for coolants and / or lubricants.
  • the spray bars 3, 3a are fed by a pump 4 from a tank 5.
  • Further spray bars 6, 6a are directed towards the end regions of the rollers. she are also fed from the tank 5 via a pump 7.
  • the spray medium is given via a cooling device 8, which the temperature of the Spray medium according to the given by a computer, not shown Values can be optimally regulated by means of a temperature controller 9.
  • About valves 10 can the spray width and spray intensity of the further spray bars 6, 6a can be set.
  • the spray medium is collected together and passed over a return line 11 in the common tank 5.
  • the Possibility of separate tanks for the two differently tempered Provide spray media In this case, the collection of spray media sensibly carried out separately.
  • Fig. 2a shows a work roll 12, from which a wide strip 2 is rolled.
  • the further spray bars 6, 6 'and the tape outlet side are the other on the belt inlet side further spray bars 13, 13 'can be seen, their effective width to the width of the Rolling strip 2 is set and narrow in contact with the strip edges cover standing areas of the work rolls 12.
  • nozzles 14 to 14 n are aligned in the direction of the bale end of the work rolls 12. Only the outer nozzles 15, 15 ', 15 "have a spray direction that deviates from this direction.
  • the nozzles 14 to 14 n and 15, 15', 15" can be switched on and off individually, in order to reduce the spray width to the width of the to be able to adjust strip 2 to be rolled.
  • FIG. 4a shows, similarly to FIG. 2a, the spray bars 6, 6 'on the tape inlet side and on the tape outlet side the spray bars 13, 13', the width of the spray bars 6, 6 'and 13, 13' being chosen in this way is that they can optimally cool the bales of the work rolls 12 in the band edge contact area from minimum to maximum bandwidth.
  • Fig. 5 shows the bale contour 17 of the work roll 12 after about 60 minutes Rolling process, with no further exposure to the roll surface Spray bars 6, 6 '; 13, 13 '; 16, 16 'has taken place. It has become the usual one thermal crowning set. There is a slower one in the band edge contact area Recognize a drop in crowning. This slow decline in crowning is not in the Location, the edge drop formation caused by the material cross flow behavior in the Avoid band edge area.
  • FIG. 6 shows a bale contour corresponding to FIG. 5.
  • additional spray beams 6, 6 '; 13, 13 '; 16, 16 'worked The strong crowning drop in the band edge contact area is set in such a way by the additional cooling that that by the material cross flow behavior caused edge-drop can be reduced or minimized.
  • Fig. 7 shows a schematic representation of the invention Control device.
  • the band 2 can be seen, which is characterized by a number of Scaffolding is cold rolled.
  • the figure shows a four-high scaffold 18, which the edge-drop control according to the invention is assigned to during a Sexto scaffold 19 is shown with the usual flatness control.
  • the Edge-drop control according to the invention can of course also have several or all stands of a rolling mill.
  • the measured values are saved using a computer 21 compared to which the optimal cooling water temperature and the optimal Control of the individual nozzles are also stored.
  • the read ones Cooling water temperatures as well as the signals for the nozzle control are on the coolant temperature control circuit 22 or on the nozzle assignment control circuit 23 given.
  • receptacles 20, receptacles 24, 24 ' which also the band profile, especially in the band edge area, the bandwidth and measure the band tension distribution.
  • Controller 25 supplied, which corrects the measured values to a optimal spray width, spray medium intensity and coolant temperature. This Measurement results can also be used for this purpose, which are stored in the computer 21 correct stored values.

Abstract

The apparatus is intended for controlling the profile of a strip rolled in at least one roll stand with ancillary equipment including spray beams for possible controlled delivery of a cooling and/or lubricating agent. Additional spray beams are positioned in both end regions of the rolls so that the zone of influence of these spray beams cover the respective strip edges.

Description

Die Erfindung betrifft eine Vorrichtung zum Beeinflussen des Profils von in mindestens einem Gerüst gewalztem Walzband mit dem Gerüst zugeordneten Anstell-, Biege- und gegebenenfalls Verschiebevorrichtungen sowie den Walzen zugeordneten Spritzbalken zum gegebenenfalls geregelten Aufspritzen von Kühl- und/oder Schmiermittel und mit den beiden Endbereichen der Walzen zugeordneten weiteren Sprühbalken sowie einer Regelvorrichtung.The invention relates to a device for influencing the profile of in at least one stand of rolled strip with the stand associated with it Adjusting, bending and possibly shifting devices and the rollers assigned spray bars for optionally controlled spraying of cooling and / or lubricant and associated with the two end regions of the rollers further spray bars and a control device.

Beim Kaltwalzen von Bändern treten in den Bandkantenbereichen gegenüber den Bandmittenbereichen unterschiedliche Belastungen auf, welche die Konstanz der Dicke des Bandes über seine Breite nachteilig beeinflussen. Neben der über die Breite der Walzen entstehenden thermischen Bombierung und dem stärkeren Walzenverschleiß in den Bandkantenbereichen, die eine gegenüber der Bandmitte dickeres Kantenprofil hervorrufen würden, wird im wesentlichen durch das Materialquerfließverhalten in Bandbreitenrichtung ein starker Dickenabfall im Kantenbereich hervorgerufen. Der zusätzliche Verschleiß im Kantenbereich ist beim Kaltwalzen gering und die thermische Bombierung wird größtenteils durch Kühlung der Walzen im Mittelbereich ausgeglichen, so daß vorwiegend die durch Materialquerfließverhalten bewirkten, gegen die Bandmitte dünneren Bandkantenprofile entstehen, die sogenannten edge drops.When cold rolling of strips, the strip edge areas face the Belt areas different loads on the constancy of the Adversely affect the thickness of the tape across its width. In addition to the over the The width of the rolls, the thermal crowning and the stronger one Roller wear in the belt edge areas, one opposite the belt center would cause thicker edge profile is essentially by the Material cross flow behavior in the direction of the width of the material shows a sharp decrease in thickness Edge area caused. The additional wear in the edge area is at Cold rolling is low and the thermal crowning is largely due to cooling of the rolls in the middle area balanced, so that mainly due to material flow behavior caused thinner strip edge profiles towards the center of the strip arise, the so-called edge drops.

Bei einer gattungsgemäßen Vorrichtung nach der JP-A-62 173 017 soll die Größe von edge drops an Walzbändem verringert werden. Dazu wird vorgeschlagen, daß weitere Spritzbalken außerhalb der durch das zu walzende Band belegten Bereiche der Walzen angeordnet sind, wobei Verschiebeantriebe die entsprechende Verstellung der weiteren Spritzbalken außerhalb des vom Band belegten Walzenbereiches gewährleisten. Innerhalb des vom Band belegten Bereiches der Walzen sind weitere Spritzbalken vorgesehen, mittels derer die Walzenkontur durch Beheizung beeinflußt werden soll. Im Bandkantenbereich der Walzen wird damit einerseits geheizt und andererseits gekühlt, wodurch extreme Spannungen in diesem Bereich der Walzen auftreten, die zu einem neben dem üblich hohen Verschleiß im Bandkantenbereich noch größeren Verschleiß führen. Eine optimale Verringerung des edge drops ist jedoch nicht möglich, zumal eine Kühlung bis zum jeweiligen Ballenende unterbleibt.In a generic device according to JP-A-62 173 017, the size should edge drops on rolled strips. It is proposed that further spray bars outside the areas occupied by the strip to be rolled of the rollers are arranged, displacement drives the corresponding Adjustment of the other spray bars outside of the roller area occupied by the belt guarantee. Within the area of the rolls occupied by the belt Additional spray bars are provided, by means of which the roller contour is heated should be influenced. In the strip edge area of the rollers, on the one hand heated and cooled on the other hand, creating extreme tension in this area of the rollers occur, which in addition to the usual high wear in the Band edge area cause even greater wear. An optimal reduction edge drop is not possible, especially since cooling down to the respective Bale end is omitted.

Die EP-A-0 542 640 offenbart eine Kühlvorrichtung für die Walzen eines Warmwalzgerüsts. Beim Warmwalzen treten die Probleme der edge drops jedoch nicht auf. Zum Kühlen der Walzen werden bewegbare Düsen bzw. Spritzbalken vorgeschlagen, die eine variable Beeinflussung der Kühlwirkung erlauben, ohne dass die einzelnen Düsen abgeschaltet werden müssen. Hinzu kommt, daß lediglich ein zweigeteilter Spritzbalken offenbart wird, bei dem nicht von einem weiteren Spritzbalken gesprochen werden kann.EP-A-0 542 640 discloses a cooling device for the rolls of one Hot rolling mill. However, the problems of edge drops occur during hot rolling not on. Movable nozzles or spray bars are used to cool the rollers proposed that allow a variable influence on the cooling effect without that the individual nozzles have to be switched off. On top of that, only a two-part spray bar is disclosed, in which not by another Spray bar can be spoken.

Die DE-A-3 614 487 offenbart eine Vorrichtung zur Walzentemperierung, bei der außerhalb der vom Walzband belegten Bereiche der Walzen eine Heizung und innerhalb der vom Walzband belegten Bereiche der eine Kühlung erfolgen soll. Durch eine scharfe, mit der Bandkante zusammenfallende Grenze wird gewährleistet, daß etwa die gleichen Wärmeverhältnisse beidseits der Bandkanten erreicht wird. Eine Beseitigung von edge drops ist damit nicht möglich.DE-A-3 614 487 discloses a device for roll temperature control in which outside the areas of the rolls occupied by the rolled strip, a heater and within the areas occupied by the rolled strip that are to be cooled. By a sharp boundary that coincides with the band edge ensures that about the same heat conditions on both sides of the belt edges is achieved. It is not possible to remove edge drops.

Der Erfindung liegt die Aufgabe zugrunde, die edge drops besser zu minimieren bzw. gänzlich zu beseitigen, ohne dabei die Bandspannungsverteilung wesentlich nachteilig zu beeinflussen. The object of the invention is to better minimize the edge drops or to be completely eliminated without significantly reducing the belt tension distribution to adversely affect.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Die weiteren Spritzbalken können die Walzenballen in den Bandkantenbereichen zusätzlich gegebenenfalls stärker kühlen. Die Walzendurchmesser im Bandkantenbereich werden durch die zusätzliche Kühlung verkleinert. Die Erstreckung des Wirkungsbereichs der weiteren Spritzbalken vom jeweiligen Ballenende über die diesem zugewandte Bandkante hinaus gewährleistet, daß auch die durch Wärmeleitung zu den Ballenenden der Walzen gelangende Wärme besser abgeführt und damit ein optimaler Temperaturabfall in axialer Richtung der Walzen im Bandkantenbereich erlangt wird, was wiederum eine Vergrößerung des Walzspaltes im Bandkantenbereich zur Folge hat. Damit wird aber dem durch das Materialquerfließverhalten hervorgerufenen edge drop entgegengewirkt.This object is solved by the features of claim 1. The others Spray bars can also be applied to the roller bales in the belt edge areas cool more if necessary. The roll diameter in the band edge area are reduced by the additional cooling. The extension of the Effective range of the other spray bars from the respective bale end over the this facing band edge also ensures that the through Heat conduction to the bale ends of the rollers is better dissipated and thus an optimal temperature drop in the axial direction of the rolls in Strip edge area is obtained, which in turn enlarges the roll gap in the band edge area. But that is what the Material cross flow behavior counteracted edge drop counteracted.

Die den Walzen zuordenbaren weiteren Spritzbalken werden in der Regel nur den Arbeitswalzen zugeordnet, da diese durch die Walzarbeit und den Kontakt mit dem Walzgut thermisch am stärksten belastet werden.The further spray bars that can be assigned to the rollers are usually only the Assigned work rolls, because of this through the rolling work and the contact with the Rolling material are subjected to the greatest thermal stress.

Werden die weiteren Spritzbalken ein- und/oder auslaufseitig des Gerüstes angeordnet, so läßt sich gegebenenfalls eine erheblich stärkere Kühlung der Ballenendbereiche erzielen. Zudem kann eine optimale Einstellung der weiteren Spritzbalken ausgewählt werden.Are the other spray bars on the inlet and / or outlet side of the scaffold arranged, so if necessary a much stronger cooling of the Achieve bale end areas. In addition, an optimal setting of the other Spray bars can be selected.

Weisen die Spritzdüsen der weiteren Spritzbalken eine zu den Ballenenden gerichtete Spritzrichtung auf, so ist gewährleistet, daß das Spritzmedium von der Walzenmitte und damit von der Bandmitte fortgespritzt wird, so daß in diesem Bereich keine zusätzliche, ungewollte Kühlung auftritt.Point the spray nozzles of the other spray bars towards the end of the bale Directional spray direction, it is ensured that the spray medium from the Roll center and thus is sprayed away from the belt center, so that in this No additional, unwanted cooling occurs in the area.

Es ist sinnvoll, die Spritzbreite der weiteren Spritzbalken an die Walzbandbreite anzupassen, damit auch bei Walzbändern unterschiedlicher Breite eine optimale edge-drop-Vermeidung bzw. -Minimierung gewährleistet ist. It makes sense to match the spray width of the other spray bars to the rolling strip width adjust so that it is optimal even with rolled strips of different widths edge-drop prevention or minimization is guaranteed.

Von Vorteil ist es, die weiteren Spritzbalken mit Spritzmedium zu versorgen, welches eine gegenüber dem Spritzmedium für die Spritzbalken andere Temperatur, vorzugsweise eine niedrigere Temperatur aufweist, wobei z.B. ein gemeinsamer Tank für das Spritzmedium vorgesehen und die Temperatur des Spritzmediums auf die Temperatur für die Spritzbalken eingestellt sein kann, und das Spritzmedium für die weiteren Spritzbalken über einen steuerbaren Kühler abkühlbar ist.It is advantageous to supply the other spray bars with spray medium, which a different temperature than the spray medium for the spray bars, preferably has a lower temperature, e.g. a common one Tank provided for the spray medium and the temperature of the spray medium on the temperature for the spray bars can be set, and the spray medium for the further spray bar can be cooled by a controllable cooler.

Es ist vorteilhaft, eine Regelvorrichtung vorzusehen, die als Vorwärtsregelung arbeitet und bei der bandeinlaufseitig gemessene und/oder vorgegebene Banddaten dazu herangezogen werden, abgespeicherte oder berechnete, optimale Werte der Spritzbreiten, Spritzmittelintensität und Spritzmitteltemperatur auszuwählen und zur entsprechenden Regelung heranzuziehen.It is advantageous to provide a control device that functions as a forward control works and at the strip inlet side measured and / or specified strip data are used, stored or calculated, optimal values of Select spraying widths, spraying agent intensity and spraying agent temperature and for appropriate regulation.

Es ist auch eine Rückwärtsregelung möglich, wobei eine Kombination der Vorwärts- und Rückwärtsregelung ebenfalls denkbar ist.A backward regulation is also possible, whereby a combination of the forward and reverse control is also conceivable.

Die Meßergebnisse für die Rückwärtsregelung können zur Vorausermitlung der optimalen Werte der Spritzbreiten, Spritzmittelintensität und Spritzmitteltemperatur und/oder zur optimierenden Beeinflussung der Steuervorrichtung der Vorwärtsregelung eingesetzt werden. Für den Fall, daß die gemessenen Werte der Aufnehmer oder die vorgegebenen Banddaten nicht dazu verwendet werden, aus einem Speicher optimale Werte für die Spritzbreiten, Spritzmittelintensitäten und/oder Kühlmitteltemperaturen auszuwählen, so kann ein Rechner, dem entsprechende Funktionen für die jeweils optimalen Werte der Sprühbreiten, Sprühmittelintensitäten und/oder Kühlmitteltemperaturen vorliegen unter Zuhilfenahme dieser Meßergebnisse die optimalen Werte für die Stellglieder der Regelvorrichtung errechnen.The measurement results for the reverse control can be used to determine the optimal values of spray widths, spray medium intensity and spray medium temperature and / or for optimizing the control device of the forward control be used. In the event that the measured values of the Transducer or the specified tape data are not used a memory optimal values for the spray widths, spray medium intensities and / or to select coolant temperatures, a computer, the corresponding Functions for the optimal values of the spray widths, spray agent intensities and / or coolant temperatures are available with the help of these Measurement results the optimal values for the actuators of the control device calculate.

Die Erfindung wird anhand einer Zeichnung näher erläutert. Dabei zeigen

Figur 1
die Übersichtsdarstellung eines Walzgerüsts mit den Arbeitswalzen bandeinlaufseitig zugeordneten erfindungsgemäßen Kühhlvorrichtungen,
Figur 2a
den bandeinlauf- und -auslaufseitigen Einsatz der erfindungsgemäßen weiteren Spritzbalken bei breitem Band,
Figur 2b
den bandeinlauf- und -auslaufseitigen Einsatz der erfindungsgemäßen weiteren Spritzbalken bei schmalem Band,
Figur 3
die an einer Gerüsthälfte dargestellte Düsenanordnung eines weiteren Spritzbalkens,
Figur 4a, 4b
unterschiedlich ausgebildete weitere Spritzbalken, welche ein- und auslaufseitig der Arbeitswalze vorgesehen sind,
Figur 5
die Ballenkontur einer Arbeitswalze ohne Zusatzkühlung,
Figur 6
die Ballenkontur einer Arbeitswalze mit zusätzlicher Kühlung, und
Figur 7
das Regelschema für die edge-drop-Regelung.
The invention is explained in more detail with reference to a drawing. Show
Figure 1
the overview of a rolling stand with the work rolls cooling devices according to the invention assigned to the strip inlet side,
Figure 2a
the belt inlet and outlet side use of the further spray bars according to the invention with a wide belt,
Figure 2b
the belt inlet and outlet side use of the further spray bars according to the invention with a narrow belt,
Figure 3
the nozzle arrangement of a further spray bar shown on a frame half,
Figure 4a, 4b
differently designed further spray bars, which are provided on the inlet and outlet side of the work roll,
Figure 5
the bale contour of a work roll without additional cooling,
Figure 6
the bale contour of a work roll with additional cooling, and
Figure 7
the control scheme for edge-drop control.

Der Fig. 1 ist ein Walzgerüst 1 zum Walzen von Band 2 zu entnehmen, an dessen Einlaufseite Spritzbalken 3, 3a für Kühl- und/oder Schmiermittel vorgesehen sind. Die Spritzbalken 3, 3a werden über eine Pumpe 4 aus einem Tank 5 gespeist.1 shows a roll stand 1 for rolling strip 2, on the latter Inlet side spray bars 3, 3a are provided for coolants and / or lubricants. The spray bars 3, 3a are fed by a pump 4 from a tank 5.

Weitere Spritzbalken 6, 6a sind auf die Ballenendbereiche der Walzen gerichtet. Sie werden ebenfalls über eine Pumpe 7 aus dem Tank 5 gespeist. Das Spritzmedium wird über eine Kühlvorrichtung 8 gegeben, welche die Temperatur des Spritzmediums entsprechend den von einem nicht gezeigten Rechner vorgegebenen Werten mittels eines Temperaturreglers 9 optimal einzuregeln vermag. Über Ventile 10 kann die Spritzbreite und Spritzintensität der weiteren Spritzbalken 6, 6a eingestellt werden. Das Spritzmedium wird gemeinsam gesammelt und gelangt über eine Rückleitung 11 in den gemeinsamen Tank 5. Es besteht selbstverständlich die Möglichkeit, getrennte Tanks für die beiden unterschiedlich ternperierten Spritzmedien vorzusehen. In diesem Falle wird die Sammlung der Spritzmedien sinnvollerweise getrennt durchgeführt.Further spray bars 6, 6a are directed towards the end regions of the rollers. she are also fed from the tank 5 via a pump 7. The spray medium is given via a cooling device 8, which the temperature of the Spray medium according to the given by a computer, not shown Values can be optimally regulated by means of a temperature controller 9. About valves 10 can the spray width and spray intensity of the further spray bars 6, 6a can be set. The spray medium is collected together and passed over a return line 11 in the common tank 5. There is of course the Possibility of separate tanks for the two differently tempered Provide spray media. In this case, the collection of spray media sensibly carried out separately.

Fig. 2a zeigt eine Arbeitswalze 12, von welcher ein breites Band 2 gewalzt wird. Bandeinlaufseitig sind die weiteren Spritzbalken 6, 6' und bandauslaufseitig die weiteren Spritzbalken 13, 13' erkennbar, deren wirksame Breite auf die Breite des Walzbandes 2 eingestellt ist und schmale mit den Bandkanten in Berührung stehende Bereiche der Arbeitswalzen 12 abdecken.Fig. 2a shows a work roll 12, from which a wide strip 2 is rolled. The further spray bars 6, 6 'and the tape outlet side are the other on the belt inlet side further spray bars 13, 13 'can be seen, their effective width to the width of the Rolling strip 2 is set and narrow in contact with the strip edges cover standing areas of the work rolls 12.

Fig. 2b zeigt dagegen ein schmales Band 2 und entsprechend in ihrer Wirkbreite eingestellte Spritzbalken 6, 6'; 13, 13'.2b, on the other hand, shows a narrow band 2 and correspondingly in its effective width set spray bars 6, 6 '; 13, 13 '.

In Fig. 3 ist der Spritzbalken 6' zu erkennen, dessen Düsen 14 bis 14n in Richtung auf das Ballenende der Arbeitswalzen 12 ausgerichtet sind. Lediglich die äußeren Düsen 15, 15', 15" weisen eine von dieser Richtung abweichende Spritzrichtung auf. Die Düsen 14 bis 14n und 15, 15', 15" sind einzeln ein- bzw. abschaltbar, um so die Spritzbreite auf die Breite des zu walzenden Bandes 2 einstellen zu können.In Fig. 3 the spray bar 6 'can be seen, the nozzles 14 to 14 n are aligned in the direction of the bale end of the work rolls 12. Only the outer nozzles 15, 15 ', 15 "have a spray direction that deviates from this direction. The nozzles 14 to 14 n and 15, 15', 15" can be switched on and off individually, in order to reduce the spray width to the width of the to be able to adjust strip 2 to be rolled.

Fig. 4a zeigt ähnlich wie Fig. 2a die Spritzbalken 6, 6' auf der Bandeinlaufseite und auf der Bandauslaufseite die Spritzbalken 13, 13', wobei die Breite der Spritzbalken 6, 6' und 13, 13' so gewählt
ist, daß sie die Ballen der Arbeitswalzen 12 im Bandkantenkontaktbereich von minimaler bis maximaler Bandbreite optimal kühlen können. FIG. 4a shows, similarly to FIG. 2a, the spray bars 6, 6 'on the tape inlet side and on the tape outlet side the spray bars 13, 13', the width of the spray bars 6, 6 'and 13, 13' being chosen in this way
is that they can optimally cool the bales of the work rolls 12 in the band edge contact area from minimum to maximum bandwidth.

In Fig. 4b sind ein Spritzbalken 16 auf der Bandeinlaufseite und ein Spritzbalken 16' auf der Bandauslaufseite gezeigt. Auch hier ist gewährleistet, daß eine optimale Einstellung der Kühlbreite in Abhängigkeit von der Bandbreite möglich ist.4b there is a spray bar 16 on the strip inlet side and a spray bar 16 ' shown on the tape exit side. Here too it is guaranteed that an optimal Setting the cooling width depending on the bandwidth is possible.

Fig. 5 zeigt die Ballenkontur 17 der Arbeitswalze 12 nach ca. 60minütigem Walzvorgang, wobei keine Beaufschlagung der Walzenoberfläche durch weitere Spritzbalken 6, 6'; 13, 13'; 16, 16' stattgefunden hat. Es hat sich die übliche thermische Bombierung eingestellt. Im Bandkanten-Kontaktbereich ist ein langsamer Abfall der Balligkeit zu erkennen. Dieser langsame Abfall der Balligkeit ist nicht in der Lage, die durch das Materialquerfließverhalten bewirkte edge-drop-Bildung im Bandkantenbereich zu vermeiden.Fig. 5 shows the bale contour 17 of the work roll 12 after about 60 minutes Rolling process, with no further exposure to the roll surface Spray bars 6, 6 '; 13, 13 '; 16, 16 'has taken place. It has become the usual one thermal crowning set. There is a slower one in the band edge contact area Recognize a drop in crowning. This slow decline in crowning is not in the Location, the edge drop formation caused by the material cross flow behavior in the Avoid band edge area.

Der Fig. 6 ist eine der Fig. 5 entsprechende Ballenkontur entnehmbar. Hier wurde jedoch mit Beaufschlagung der Walzenoberfläche durch weitere Spritzbalken 6, 6'; 13, 13'; 16, 16' gearbeitet. Der starke Balligkeitsabfall im Bandkanten-Kontaktbereich ist derart durch die zusätzliche Kühlung eingestellt, daß der durch das Materialquerfließverhalten bewirkte edge-drop reduziert bzw. minimiert werden kann.FIG. 6 shows a bale contour corresponding to FIG. 5. Here was however with additional spray beams 6, 6 '; 13, 13 '; 16, 16 'worked. The strong crowning drop in the band edge contact area is set in such a way by the additional cooling that that by the material cross flow behavior caused edge-drop can be reduced or minimized.

Die Fig. 7 zeigt in schematischer Darstellung die erfindungsgemäße Regelvorrichtung. Es ist das Band 2 zu erkennen, welches durch eine Anzahl von Gerüsten kaltgewalzt wird. Der Figur ist ein Quartogerüst 18 zu entnehmen, welchem die erfindungsgemäße edge-drop-Regelung zugeordnet ist, während ein Sexto-Gerüst 19 mit der üblichen Planheitsregelung gezeigt wird. Die erfindungsgemäße edge-drop-Regelung kann selbstverständlich auch mehreren bzw. allen Gerüsten einer Walzstraße zugeordnet werden. Bandeinlaufseitig sind Aufnehmer 20 zur Bestimmung der Dicke, des Bandprofils insbesondere im Bandkantenbereich, der Breite und/oder der Bandspannungsverteilung vorgesehen. Die gemessenen Werte werden über einen Rechner 21 mit abgespeicherten Werten verglichen, zu denen die optimale Kühlwassertemperatur und die optimale Ansteuerung der einzelnen Düsen ebenfalls abgespeichert sind. Die ausgelesenen Kühlwassertemperaturen sowie die Signale für die Düsenansteuerung werden auf den Kühlmittel-Temperaturregelkreis 22 bzw. auf den Düsenbelegungs-Regelkreis 23 gegeben.Fig. 7 shows a schematic representation of the invention Control device. The band 2 can be seen, which is characterized by a number of Scaffolding is cold rolled. The figure shows a four-high scaffold 18, which the edge-drop control according to the invention is assigned to during a Sexto scaffold 19 is shown with the usual flatness control. The Edge-drop control according to the invention can of course also have several or all stands of a rolling mill. Are on the belt inlet side Transducer 20 for determining the thickness, the strip profile, especially in the Band edge area, the width and / or the band tension distribution provided. The measured values are saved using a computer 21 compared to which the optimal cooling water temperature and the optimal Control of the individual nozzles are also stored. The read ones Cooling water temperatures as well as the signals for the nozzle control are on the coolant temperature control circuit 22 or on the nozzle assignment control circuit 23 given.

Alternativ oder auch zusammen mit den Aufnehmem 20 arbeiten Aufnehmer 24, 24', welche ebenfalls das Bandprofil insbesondere im Bandkantenbereich, die Bandbreite und die Bandspannungsverteilung messen. Diese Meßergebnisse werden dem Regler 25 zugeführt, welcher eine Korrektur der gemessenen Werte auf eine optimale Spritzbreite, Spritzmittelintensität und Kühlmitteltemperatur bewirkt. Diese Meßergebnisse können weiterhin dazu verwendet werden, die im Rechner 21 abgelegten Werte zu korrigieren.Alternatively or also together with the receptacles 20, receptacles 24, 24 ', which also the band profile, especially in the band edge area, the bandwidth and measure the band tension distribution. These measurement results are the Controller 25 supplied, which corrects the measured values to a optimal spray width, spray medium intensity and coolant temperature. This Measurement results can also be used for this purpose, which are stored in the computer 21 correct stored values.

Claims (11)

  1. Device for influencing the profile of cold strip (2) rolled in at least one roll stand (1), with adjusting, bending and optionally also displacing devices associated with the roll stand (1) as well as spray bars (3, 3a) associated with the rolls (12) for optionally regulated spraying on of coolant and/or lubricant, as well as with further spray bars (6, 6', 6a; 13, 13'; 16, 16') associated with the two end regions of the circumferential surfaces of the rolls (12), characterised in that the effective range of the further spray bars (6, 6', 6a; 13, 13'; 16, 16') extends in each case from one circumferential surface end over the rolled strip edge, which faces this circumferential surface end, into the strip edge region of the cold strip (2), wherein the spray nozzles (14 to 14n; 15, 15', 15") of the further spray bars (6, 6'; 13, 13'; 16, 16') act on the rolls (12) each time from a circumferential surface end up to a presettable dimension over the strip edge facing this.
  2. Device according to claim 1, characterised in that the further spray bars (6, 6'; 13, 13'; 16, 16') are associated merely with the working rolls (12).
  3. Device according to claim 1 or 2, characterised in that the further spray bars (6, 6'; 13, 13'; 16, 16') are arranged at the inlet side and/or outlet side of the respective stand (18).
  4. Device according to one of claims 1 to 3, characterised in that the spray nozzles (14 to 14n, 15, 15') of the further spray bars (6, 6'; 13, 13'; 16, 16') have a spray direction with a component facing the circumferential surface end.
  5. Device according to one of claims 1 to 4, characterised in that the working width of the actual spray nozzles (14 to 14n; 15, 15') of the further spray bars (6, 6'; 13, 13'; 16, 16') can be matched to the rolled strip width.
  6. Device according to one of claims 1 to 5, characterised in that the temperature of the spray medium of the further spray bars (6, 6'; 13, 13'; 16, 16') differs from the temperature of the spray medium for the spray bars (3, 3a).
  7. Device according to one of claims 1 to 6, with a regulating device for influencing the cold strip profile in the strip edge region, characterised in that pick-ups (20), which measure the thickness, the profile particularly in the strip edge region, the width and/or the tension of the cold strip (2) running in, are provided at the entry side of the respective roll stand, and that a computer (21) is provided by way of which pre-stored spray widths, spray mediuim intensities and/or coolant temperatures, which are optimal for the measurement result of the pick-ups (20), are determinable for the further spray bars (6, 6'; 6a; 13, 13'; 16).
  8. Device according to one of claims 1 to 6, with a regulating device for influencing the cold strip profile in the strip edge region, characterised in that a computer (21), at which the thickness, the profile particularly in the strip edge region, the width and/or the tension of the cold strip (2) running in are presettable, is provided and determines optimal pre-stored spray widths, spray medium intensities and/or coolant temperatures for the further spray bars (6, 6'; 6a; 13, 13'; 16) on the basis of a computer model.
  9. Device according to one of claims 7 and 8, characterised in that pick-ups (24, 24') are provided at the exit side of the respective roll stand, that the pick-ups (24, 24') are capable of measuring the profile particularly in the strip edge region, the width and the strip tension distribution of the departing rolled strip (2) and that the measured values are supplied to the regulating device (25) for the correction with respect to optimal spray width, spray medium intensity and/or coolant temperature.
  10. Device according to claim 9, characterised in that the values measured by the pick-ups (24, 24') at the exit of the respective stand are capable of correctively influencing the computing process in the computer (21).
  11. Device according to one of claims 7 to 10, characterised in that the computer or computers (21) is or are capable of computing optimal spray widths, spray medium intensities and/or coolant temperatures for the further spray bars (6, 6', 6a; 13, 13'; 16).
EP96118147A 1995-11-20 1996-11-13 Device for influencing the profile section of a rolled strip Expired - Lifetime EP0776710B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19543168 1995-11-20
DE19543168 1995-11-20

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US (1) US5799523A (en)
EP (1) EP0776710B1 (en)
JP (1) JP3895812B2 (en)
KR (1) KR970025749A (en)
CN (1) CN1079709C (en)
AT (1) ATE211031T1 (en)
CA (1) CA2190691A1 (en)
DE (1) DE59608495D1 (en)
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RU (1) RU2184630C2 (en)

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JPH09164406A (en) 1997-06-24
DE59608495D1 (en) 2002-01-31
JP3895812B2 (en) 2007-03-22
EP0776710A1 (en) 1997-06-04
ES2170190T3 (en) 2002-08-01
CN1079709C (en) 2002-02-27
CA2190691A1 (en) 1997-05-21
CN1151914A (en) 1997-06-18
KR970025749A (en) 1997-06-24
RU2184630C2 (en) 2002-07-10
US5799523A (en) 1998-09-01
ATE211031T1 (en) 2002-01-15

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