EP1025918A2 - Method and installation for forming metal strip - Google Patents

Method and installation for forming metal strip Download PDF

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Publication number
EP1025918A2
EP1025918A2 EP00100943A EP00100943A EP1025918A2 EP 1025918 A2 EP1025918 A2 EP 1025918A2 EP 00100943 A EP00100943 A EP 00100943A EP 00100943 A EP00100943 A EP 00100943A EP 1025918 A2 EP1025918 A2 EP 1025918A2
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EP
European Patent Office
Prior art keywords
strip
rollers
driver
thickness
cooling section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00100943A
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German (de)
French (fr)
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EP1025918A3 (en
EP1025918B1 (en
Inventor
Jürgen Seidel
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SMS Siemag AG
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SMS Demag AG
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Publication of EP1025918A2 publication Critical patent/EP1025918A2/en
Publication of EP1025918A3 publication Critical patent/EP1025918A3/en
Application granted granted Critical
Publication of EP1025918B1 publication Critical patent/EP1025918B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B2001/228—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length skin pass rolling or temper rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0071—Levelling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/02—Austenitic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/04—Ferritic rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/02—Profile, e.g. of plate, hot strip, sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/02—Roll dimensions
    • B21B2267/06—Roll diameter
    • B21B2267/065—Top and bottom roll have different diameters; Asymmetrical rolling
    • 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
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • 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
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0284—Cleaning devices removing liquids removing lubricants

Definitions

  • the invention relates to a method and a plant for forming of metal strip in a hot strip mill from a finishing train, a cooling section, a driver and a reel system.
  • the belt leaves the finishing train with an uneven part Flatness or stress distribution over the Bandwidth.
  • the uneven properties of the hot strip across the width then lead directly or indirectly to different ones Flatness of the cold strip.
  • the invention is based on the subtask, a method and a system for setting uniform flatness and Tension conditions in hot strip to provide in To get cold state flat belt.
  • Another subtask is the structure or the mechanical properties as well to specifically influence the surface structure of the belt and improve.
  • the core of the invention is the provision of a method and a system, wherein the strip material after exiting the cooling zone and one before the reeling process Thickness reduction is subjected.
  • a slight reduction in thickness is sufficient to ensure that the Finishing line and / or in the cooling section - especially at low reel temperatures - resulting flatness or eliminate uneven tension distribution in the belt and hence the quality of the tape even when cold improve.
  • the forming in the finishing train takes place in the austenite or Ferrite area, in the second rolling step behind the cooling section however, it is usually rolled ferritically.
  • the proposed reduction in thickness is achieved by a first embodiment of the gap between the two Roles of a modified (reinforced) driver itself it is set that a rolling process, i.e. a Thickness reduction takes place.
  • the driver roles do not just a hustle and bustle of the tape, but also one Decrease in thickness.
  • At least one additional roll stand be arranged with thickness-reducing rollers, hereinafter also referred to as the roughing stand.
  • Frameworks that have only a slight reduction in thickness perform are also known as skin pass scaffolds known.
  • skin pass scaffolds Through their use according to the invention between outlet from the cooling section and inlet into the Coiler system of a conventional hot strip mill due to a wafer-thin decrease in tape thickness Uniformization of the tension conditions and thus a higher degree of flatness of the belt or another Surface roughness achieved before coiling.
  • the Roughing mill proposed according to the invention performs a Voltage equalization through and at the same time builds the Belt tension on.
  • the embodiment is conceivable for this roughing stand Duo and quarto frames.
  • the diameter of the top and lower rollers can be the same or different. The same applies to the driver roles.
  • the surfaces of the Driver rollers or the rollers can be smooth or to set a desired strip roughness to be roughened.
  • the driver rollers or the rollers are preferably in the Roughing mill influencing the roll gap Actuators provided.
  • Influencing variables are, for example Grinding form of the rollers or their contact pressure. Furthermore CVC cuts are conceivable or a work roll bend. As Influencing variable can also the cooling of the work rolls in the Enter scaffolding, for example multi-zone cooling. For Online grinding or polishing devices are conceivable to improve the surface quality of the rollers.
  • second belt cooling section can be arranged. This works either with a low or high pressure system.
  • Such second cooling section is recommended because it is used both for Removal of the nip wear to remove the Tertiary scale, for further lubricating oil removal as well also to further influence the belt properties serves.
  • the strip is straightened in this stretch judge zone by pulling it strongly over straightening and bending rollers is pulled, which force a redirection.
  • claimed integration of a scaffold Thickness reduction at the end of a hot rolling process between Cooling line and coiler is used to set a plan that proposed hiring or Actuators of the rolls of the roughing stand or Driver roles by means of a control loop depending on the belt properties are regulated.
  • the tape properties are, for example, the temperature distribution, the strip contour or the belt tension distribution. These are cyclically on End of the process and act within the Control loop on manipulated variables to change the Nip size.
  • the reduction in thickness over the length of the strip can vary.
  • tape head is only a small reduction in Thickness wanted to soften the tapping.
  • the distance between the drive rollers or the rollers of the finishing mill is reduced to the target thickness.
  • the proposed method and system can be general used in the manufacture of metals. In particular machining of steel and aluminum is planned.
  • Figure 1 shows a system for forming metal strip, wherein the plant is a finishing train 1 with a subsequent cooling section 2, a driver 3 and a reel system 4 comprises.
  • the ribbon is designated 5.
  • the thickness reduction carried out by means of a driver reduction framework 3 '.
  • a lubrication device 6a, 6b In front the driver reduction frame 3 ', seen in the direction of travel of the belt, there is a lubrication device 6a, 6b, according to the Driver reducer 3 'is a removal device of the lubricant 7a, 7b.
  • a deflection roller 8 is provided, which acts as a flatness measuring roller can be trained.
  • FIG. 2 shows a second embodiment of the invention, the thickness reduction of the strip between cooling section 2 and reel system 4 by means of a separate roughing stand 9 is accomplished.
  • the tape 5 is after leaving the Finishing line 1 passed through a cooling section 2. Before the On coiling, it undergoes a further reduction in thickness in one Roughing mill 9.
  • In front of the finishing mill 9 is one Lubrication device 6a, 6b arranged immediately a further cooling element 10 is then provided.
  • Thickness control includes the order of a Thickness gauge 11 before the tape through the driver 3, consisting of top and bottom roll, and from there into the Coiler 4 is performed. Between each System parts are guide rollers 11 for the belt 5 intended.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Control Of Metal Rolling (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

In a hot strip rolling process, the strip (5) is subjected to thickness reduction between the end of a cooling line (2) and a coiler (4). An Independent claim is also included for a hot strip mill for carrying out the above process, including thickness reducing rolls (3') between the cooling line end and the coiler (4). Preferred Features: The thickness reducing rolls (3') comprise strip driving rolls and/or an additional roll stand ahead of the driving rolls.

Description

Die Erfindung betrifft ein Verfahren und eine Anlage zum Umformen von Metallband in einer Warmbandwalzanlage, bestehend aus einer Fertigstraße, einer Kühlstrecke, einem Treiber und einer Haspelanlage.The invention relates to a method and a plant for forming of metal strip in a hot strip mill from a finishing train, a cooling section, a driver and a reel system.

Es ist bekannt, Metall nach dem Gießprozeß in einer Warmbandwalzanlage bis zu bestimmten Dicken zu walzen, um sie dann nach einem Haspelvorgang einer Kaltbandwalzanlage zum Walzen auf das Endmaß zuzuführen. Hierbei werden an das der Kaltbandwalzanlage zugeführte Metallband immer höhere Anforderungen hinsichtlich seiner mechanischen und geometrischen Eigenschaften, insbesondere seiner Planheit, gestellt.It is known to metal after the casting process in a hot strip mill to certain thicknesses, then to roll them after a coiling process of a cold strip rolling mill for rolling to the final dimension. Here are the cold strip mill fed metal strip ever higher requirements in terms of its mechanical and geometric properties, especially its flatness.

Gleichzeitig besteht die Tendenz, die gewünschten Endeigenschaften des Metallbandes, die sich aus den hintereinandergeschalteten Prozessen von Warm- und Kaltwalzwerk ergeben, schon im Warmwalzprozeß einzustellen bzw. ein Warmband herzustellen, das optimale Voraussetzungen für das sich anschließende Kaltwalzen mitbringt. Ebenfalls werden die Randbedingungen beim Warmwalzen schwieriger. Es werden zunehmend dünnere und breitere Produkte zur Anpassung an das Endprodukt gewünscht, was eine größere Dickenreduktion und einen Einsatz größerer Walzkräfte in den Endgerüsten der Warmbreitbandwalzstraße erfordert. Diese Effekte wirken sich nachteilig auf die Planheit des Warmbandes und somit auch auf die Qualität des Bandes im kalten Zustand aus.At the same time there is a tendency towards the desired final properties of the metal band, which are made up of the series Processes of hot and cold rolling mill result to be set in the hot rolling process or to produce a hot strip, the optimal conditions for the subsequent Bring cold rolling. The boundary conditions are also more difficult when hot rolling. It is growing thinner and wider products to adapt to the final product wanted what a greater thickness reduction and an insert greater rolling forces in the end stands of the hot wide strip mill required. These effects have an adverse effect on the flatness of the hot strip and thus also on the Quality of the tape when cold.

Das Band verläßt zum Teil die Fertigstraße mit einer ungleichmäßigen Planheits- bzw. Spannungsverteilung über der Bandbreite. Weiterhin ändert sich der Planheitszustand bzw. die Gefügeform und -verteilung innerhalb der Kühlstrecke. Die ungleichmäßigen Eigenschaften des Warmbandes über der Breite führen dann direkt oder indirekt zu unterschiedlichen Planheitsverhältnissen des kalten Bandes.The belt leaves the finishing train with an uneven part Flatness or stress distribution over the Bandwidth. The flatness state or the structure and distribution within the cooling section. The uneven properties of the hot strip across the width then lead directly or indirectly to different ones Flatness of the cold strip.

Der Erfindung liegt die Teilaufgabe zugrunde, ein Verfahren und eine Anlage zur Einstellung von gleichmäßigen Planheits- und Spannungsverhältnissen im Warmband bereitzustellen, um im Kaltzustand planes Band zu erhalten. Eine weitere Teilaufgabe ist es, das Gefüge bzw. die mechanischen Eigenschaften sowie die Oberflächenstruktur des Bandes gezielt zu beeinflussen und zu verbessern.The invention is based on the subtask, a method and a system for setting uniform flatness and Tension conditions in hot strip to provide in To get cold state flat belt. Another subtask is the structure or the mechanical properties as well to specifically influence the surface structure of the belt and improve.

Diese Aufgaben werden durch die Merkmale des Verfahrensanspruchs 1 und durch die Merkmale des Anspruchs 2 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen offenbart.These tasks are characterized by the characteristics of the Method claim 1 and by the features of claim 2 solved. Advantageous embodiments of the invention are shown in disclosed in the subclaims.

Kern der Erfindung ist die Bereitstellung eines Verfahrens und einer Anlage, wobei das Bandmaterial nach Austritt aus der Kühlzone und vor dem Haspelvorgang einer Dickenreduzierung unterzogen wird.The core of the invention is the provision of a method and a system, wherein the strip material after exiting the cooling zone and one before the reeling process Thickness reduction is subjected.

Erfindungsgemäß findet trotz Beendigung des eigentlichen Walzprozesses nach dem Durchlauf durch die Fertigstraße demnach ein weiterer Walzprozeß statt.According to the invention takes place despite the end of the actual Rolling process after passing through the finishing train therefore another rolling process takes place.

Eine geringe Dickenreduzierung reicht aus, um die in der Fertigstraße und/oder in der Kühlstrecke - besonders bei niedrigen Haspeltemperaturen - entstandene Unplanheit bzw. ungleichmäßige Spannungsverteilung im Band zu eliminieren und damit die Qualität des Bandes auch im Kaltzustand zu verbessern. A slight reduction in thickness is sufficient to ensure that the Finishing line and / or in the cooling section - especially at low reel temperatures - resulting flatness or eliminate uneven tension distribution in the belt and hence the quality of the tape even when cold improve.

Zwecks weiterer Reduzierung der Enddicke und Veränderung des Gefüges bzw. mechanischer Eigenschaften sind auch größere Dickenabnahmen denkbar.To further reduce the final thickness and change the Structures or mechanical properties are also larger Thickness reductions conceivable.

Die Umformung in der Fertigstraße erfolgt im Austenit- oder Ferritgebiet, beim zweiten Walzschritt hinter der Kühlstrecke wird jedoch in der Regel ausschließlich ferritisch gewalzt.The forming in the finishing train takes place in the austenite or Ferrite area, in the second rolling step behind the cooling section however, it is usually rolled ferritically.

Die vorgeschlagene Dickenreduzierung wird erreicht, indem bei einer ersten Ausführungsform der Spalt zwischen den beiden Rollen eines modifizierten (verstärkten) Treibers selbst so eingestellt ist, daß ein Walzprozeß, d.h. eine Dickenreduzierung, stattfindet. Die Treiberrollen bewirken nicht nur ein Treiben des Bandes, sondern zusätzlich eine Dickenabnahme.The proposed reduction in thickness is achieved by a first embodiment of the gap between the two Roles of a modified (reinforced) driver itself it is set that a rolling process, i.e. a Thickness reduction takes place. The driver roles do not just a hustle and bustle of the tape, but also one Decrease in thickness.

Bei einer zweiten Ausführungsform kann auch vor den Treiberrollen, die wahlweise dann nur treibend oder auch dickenreduzierend wirken, mindestens ein zusätzliches Walzgerüst mit dickenreduzierenden Walzen angeordnet sein, nachfolgend auch als Nachwalzgerüst bezeichnet.In a second embodiment, before the driver roles, which then either only driving or also reduce thickness, at least one additional roll stand be arranged with thickness-reducing rollers, hereinafter also referred to as the roughing stand.

Gerüste, die nur eine geringfügige Dickenreduzierung durchführen, sind auch unter der Bezeichnung Skin-Pass-Gerüste bekannt. Durch deren erfindungsgemäßen Einsatz zwischen Auslauf aus der Kühlstrecke und Einlauf in die Haspelanlage einer herkömmlichen Warmbandwalzanlage wird aufgrund einer hauchdünnen Abnahme der Banddicke eine Vergleichmäßigung der Spannungsverhältnisse bewirkt und damit ein höherer Planheitsgrad des Bandes oder eine andere Oberflächenrauhigkeit vor dem Aufcoilen erreicht. Das erfindungsgemäß vorgeschlagene Nachwalzgerüst führt eine Spannungsvergleichmäßigung durch und baut gleichzeitig den Bandzug auf. Frameworks that have only a slight reduction in thickness perform are also known as skin pass scaffolds known. Through their use according to the invention between outlet from the cooling section and inlet into the Coiler system of a conventional hot strip mill due to a wafer-thin decrease in tape thickness Uniformization of the tension conditions and thus a higher degree of flatness of the belt or another Surface roughness achieved before coiling. The Roughing mill proposed according to the invention performs a Voltage equalization through and at the same time builds the Belt tension on.

Denkbar sind für dieses Nachwalzgerüst die Ausführungsform Duo- und Quarto-Gerüste. Die Durchmesser der oberen und unteren Walzen können gleich oder unterschiedlich sein. Analoges gilt für die Treiberrollen. Die Oberflächen der Treiberrollen bzw. der Walzen können glatt ausgebildet sein oder zwecks Einstellung einer gewünschten Bandrauhigkeit aufgerauht sein.The embodiment is conceivable for this roughing stand Duo and quarto frames. The diameter of the top and lower rollers can be the same or different. The same applies to the driver roles. The surfaces of the Driver rollers or the rollers can be smooth or to set a desired strip roughness to be roughened.

Vorzugsweise sind die Treiberrollen bzw. die Walzen in dem Nachwalzgerüst mit den Walzspalt beeinflussenden Stellgliedern versehen. Einflußgrößen sind beispielsweise die Schlifform der Walzen oder deren Anpreßkraft. Des weiteren sind CVC-Schliffe denkbar oder eine Arbeitswalzenbiegung. Als Einflußgröße kann ferner die Kühlung der Arbeitswalzen in den Gerüsten eingehen, zum Beispiel eine Vielzonenkühlung. Zur Verbesserung der Oberflächengüte der Walzen sind Online-Schleif- oder Poliereinrichtungen denkbar.The driver rollers or the rollers are preferably in the Roughing mill influencing the roll gap Actuators provided. Influencing variables are, for example Grinding form of the rollers or their contact pressure. Furthermore CVC cuts are conceivable or a work roll bend. As Influencing variable can also the cooling of the work rolls in the Enter scaffolding, for example multi-zone cooling. For Online grinding or polishing devices are conceivable to improve the surface quality of the rollers.

Es empfiehlt sich zwecks Steigerung der Dickenreduzierung oder der Einstellung einer gewünschten Oberflächentextur an dem Treibergerüst bzw. an dem Nachwalzgerüst eine Einrichtung zur Walzspaltschmierung anzuordnen. Vorzugsweise wird hierbei als Stellglied eine über die Bandbreite zonenweise aktivierbare Schmierung vorgeschlagen.It is recommended to increase the thickness reduction or the setting of a desired surface texture a device on the driver stand or on the finishing mill to be arranged for roll gap lubrication. This is preferred as an actuator one by zone over the bandwidth activatable lubrication proposed.

Es ist zu erwarten, daß nach einer derartigen Einrichtung zur Walzspaltschmierung noch unverbrannte Reste des Schmiermittels, vorzugsweise Öl, auf dem Band vorhanden sind. Deshalb empfiehlt es sich, nach einer derartigen Einrichtung eine Einrichtung zur Entfernung des überschüssigen Schmiermittels vorzusehen, beispielsweise durch Anordnung eines Wasserspritzbalkens.It is expected that after such a device for Roll gap lubrication still unburned remains of the Lubricant, preferably oil, is present on the belt. Therefore, it is recommended to use such a facility a device for removing the excess Provide lubricant, for example by arrangement of a water spray bar.

Falls die Dickenreduzierung mittels eines Nachwalzgerüstes erreicht wird, sollte vorzugsweise nach der Walzzone eine zweite Bandkühlstrecke angeordnet sein. Diese arbeitet entweder mit einem Nieder- oder Hochdrucksystem. Eine solche zweite Kühlstrecke ist empfehlenswert, weil sie sowohl zur Entfernung des Walzspaltabriebes, zur Entfernung des Tertiärzunders, zur weiteren Schmierölentfernung sowie ebenfalls zur weiteren Beeinflussung der Bandeigenschaften dient.If the thickness is reduced using a roughing stand is reached, preferably after the rolling zone second belt cooling section can be arranged. This works either with a low or high pressure system. Such second cooling section is recommended because it is used both for Removal of the nip wear to remove the Tertiary scale, for further lubricating oil removal as well also to further influence the belt properties serves.

Zur besseren Kontrolle ist ein Dickenmeßgerät nach dem Nachwalzgerüst, in Bandlaufrichtung gesehen, vorgesehen.For better control is a thickness gauge after Rough mill, seen in the direction of strip travel, provided.

Vorteilhafterweise wird vorgeschlagen, daß das Band zwischen dem Ende der Kühlstrecke und der Haspelanlage nicht nur durch ein Nachwalzgerüst, sondern zusätzlich durch eine Streckrichterzone läuft. In dieser Streckrichterzone wird das Band gerichtet, indem es mit starkem Zug über Richt- und Biegerollen gezogen wird, die eine Umlenkung erzwingen.It is advantageously proposed that the band between not only through the end of the cooling section and the coiler a finishing mill, but also through a stretch-straightening zone running. The strip is straightened in this stretch judge zone by pulling it strongly over straightening and bending rollers is pulled, which force a redirection.

Als besonders bevorzugte Ausführungsform der erfindungsgemäß beanspruchten Integration eines Gerüstes zur Dickenreduzierung am Ende eines Warmwalzprozesses zwischen Kühlstrecke und Haspelanlage wird zur Einstellung eines planen Bandes vorgeschlagen, daß die Anstellung oder Stellglieder der Walzen des Nachwalzgerüstes bzw. der Treiberrollen mittels eines Regelkreises in Abhängigkeit von den Bandeigenschaften geregelt werden. Die Bandeigenschaften sind beispielsweise die Temperaturverteilung, die Bandkontur oder die Bandzugspannungsverteilung. Diese werden zyklisch am Ende des Prozesses aufgenommen und wirken innerhalb des Regelkreises auf Stellgrößen zur Veränderung der Walzspaltgröße ein.As a particularly preferred embodiment of the invention claimed integration of a scaffold Thickness reduction at the end of a hot rolling process between Cooling line and coiler is used to set a plan that proposed hiring or Actuators of the rolls of the roughing stand or Driver roles by means of a control loop depending on the belt properties are regulated. The tape properties are, for example, the temperature distribution, the strip contour or the belt tension distribution. These are cyclically on End of the process and act within the Control loop on manipulated variables to change the Nip size.

In analoger Weise kann die Einstellung der Streckrichterrollen zueinander und zum Band in Abhängigkeit der Bandeigenschaften geregelt werden. The setting of the Stretching judge rollers depending on each other and on the belt the belt properties are regulated.

Die Dickenreduzierung über der Bandlänge kann variieren. Am Bandkopf ist beispielsweise nur eine geringe Reduzierung der Dicke gewollt, um den Anstichstoß zu mildern. Anschließend wird der Abstand zwischen den Treiberrollen oder den Walzen des Nachwalzgerüstes auf Solldicke verkleinert. Das vorgeschlagene Verfahren und die Anlage können allgemein bei der Herstellung von Metallen Einsatz finden. Insbesondere ist die Bearbeitung von Stählen und Aluminium vorgesehen.The reduction in thickness over the length of the strip can vary. At the For example, tape head is only a small reduction in Thickness wanted to soften the tapping. Subsequently is the distance between the drive rollers or the rollers of the finishing mill is reduced to the target thickness. The proposed method and system can be general used in the manufacture of metals. In particular machining of steel and aluminum is planned.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung: Hierbei zeigen:

Figur 1
eine Anlage zum Umformen mit dickenreduzierenden Treiberrollen zwischen Kühlstrecke und Haspelanlage;
Figur 2
eine Anlage zum Umformen mit einem Nachwalzgerüst zwischen Kühlstrecke und Haspelanlage.
Further details and advantages of the invention result from the following description:
Figure 1
a system for forming with thickness-reducing driver rollers between the cooling section and the reel system;
Figure 2
a system for forming with a roughing stand between the cooling section and the coiler.

Figur 1 zeigt eine Anlage zum Umformen von Metallband, wobei die Anlage eine Fertigstraße 1 mit nachfolgender Kühlstrecke 2, einen Treiber 3 und eine Haspelanlage 4 umfaßt. Das Band ist mit 5 bezeichnet. In Figur 1 wird die Dickenreduzierung mittels eines Treiberreduziergerüstes 3' durchgeführt. Vor dem Treiberreduziergerüst 3', in Bandlaufrichtung gesehen, befindet sich eine Schmiereinrichtung 6a,6b, nach dem Treiberreduziergerüst 3' ist eine Vorrichtung zum Entfernen des Schmiermittels 7a, 7b angeordnet. Ferner ist die Anordnung eines Kühlbalkens nach Austritt des Bandes aus dem Treiberreduziergerüst 3' vorteilhaft, hier allerdings nicht gezeigt. Zur Einführung des Bandes in die Haspelanlage 4 ist eine Umlenkrolle 8 vorgesehen, die als Planheitsmeßrolle ausgebildet sein kann. Figure 1 shows a system for forming metal strip, wherein the plant is a finishing train 1 with a subsequent cooling section 2, a driver 3 and a reel system 4 comprises. The ribbon is designated 5. In Figure 1 the thickness reduction carried out by means of a driver reduction framework 3 '. In front the driver reduction frame 3 ', seen in the direction of travel of the belt, there is a lubrication device 6a, 6b, according to the Driver reducer 3 'is a removal device of the lubricant 7a, 7b. Furthermore, the Arrangement of a chilled beam after the tape exits the Driver reduction framework 3 'advantageous, but not here shown. For the introduction of the tape into the reel system 4 is a deflection roller 8 is provided, which acts as a flatness measuring roller can be trained.

Figur 2 zeigt eine zweite Ausführungsform der Erfindung, wobei die Dickenreduzierung des Bandes zwischen Kühlstrecke 2 und Haspelanlage 4 mittels eines separaten Nachwalzgerüstes 9 bewerkstelligt wird. Das Band 5 wird nach Verlassen der Fertigstraße 1 durch eine Kühlstrecke 2 geführt. Vor dem Aufcoilen erfährt es eine weitere Dickenreduzierung in einem Nachwalzgerüst 9. Vor dem Nachwalzgerüst 9 ist eine Schmiereinrichtung 6a, 6b angeordnet, unmittelbar anschließend ist ein weiteres Kühlelement 10 vorgesehen. Zur Dickenkontrolle schließt sich die Anordnung eines Dickenmeßgerätes 11 an, bevor das Band durch den Treiber 3, bestehend aus Ober- und Unterrolle, und von dort in die Haspelanlage 4 geführt wird. Zwischen den einzelnen Anlagenteilen sind Führungsrollen 11 für das Band 5 vorgesehen.FIG. 2 shows a second embodiment of the invention, the thickness reduction of the strip between cooling section 2 and reel system 4 by means of a separate roughing stand 9 is accomplished. The tape 5 is after leaving the Finishing line 1 passed through a cooling section 2. Before the On coiling, it undergoes a further reduction in thickness in one Roughing mill 9. In front of the finishing mill 9 is one Lubrication device 6a, 6b arranged immediately a further cooling element 10 is then provided. For Thickness control includes the order of a Thickness gauge 11 before the tape through the driver 3, consisting of top and bottom roll, and from there into the Coiler 4 is performed. Between each System parts are guide rollers 11 for the belt 5 intended.

Claims (18)

Verfahren zum Umformen von Metallband in einer Warmbandwalzanlage, wobei das Metallband nach Durchlaufen einer Fertigstraße und einer Kühlstrecke über einen Treiber, der aus einer oberen und unteren Treiberrolle besteht, einer Haspelanlage zugeführt wird,
dadurch gekennzeichnet,
daß das Bandmaterial (5) in dem Bereich zwischen Ende der Kühlstrecke (2) und Haspelanlage (4) einer Dickenreduzierung unterzogen wird.Process for forming metal strip in a hot strip rolling mill, the metal strip being fed to a coiler after passing through a finishing train and a cooling section via a driver consisting of an upper and lower driver roll,
characterized,
that the strip material (5) in the area between the end of the cooling section (2) and the coiler (4) is subjected to a reduction in thickness. Anlage zum Umformen von Metallband, bestehend aus einer Walzstraße mit nachfolgernder Kühlstrecke, Treiber und Haspel zur Durchführung des Verfahrens nach Anspruch 1,
dadurch gekennzeichnet,
daß im Bereich zwischen dem Ende der Kühlstrecke (2)und Haspelanlage (4) mindestens zwei Rollen bzw. Walzen (3', 9)so übereinander angeordnet sind, daß sie einen Walzspalt bilden, der kleiner ist als die Banddicke vor den Rollen bzw. Walzen, in Bandlaufrichtung gesehen.Plant for forming metal strip, consisting of a rolling mill with subsequent cooling section, driver and reel for carrying out the method according to claim 1,
characterized,
that in the area between the end of the cooling section (2) and the reel system (4) at least two rolls or rolls (3 ', 9) are arranged one above the other so that they form a roll gap which is smaller than the strip thickness in front of the rolls or Rollers, seen in the direction of strip travel. Anlage nach Anspruch 2,
dadurch gekennzeichnet,
daß es sich bei diesen Rollen um die Treiberrollen (3')handelt, die sowohl als Treiber dienen als auch eine Dickenreduzierung durchführen. System according to claim 2,
characterized,
that these rollers are the driver rollers (3 '), which both serve as drivers and carry out a reduction in thickness. Anlage nach Anspruch 2,
dadurch gekennzeichnet,
daß vor den Treiber (3), in Bandlaufrichtung gesehen, mindestens ein Walzgerüst (9)angeordnet ist zur Dickenreduzierung des Bandes.System according to claim 2,
characterized,
that in front of the driver (3), viewed in the direction of strip travel, at least one roll stand (9) is arranged to reduce the thickness of the strip. Anlage nach Ansprüchen 2 bis 4,
dadurch gekennzeichnet,
daß sowohl an dem Treiber (3') als auch an jedem Walzgerüst (9) eine Dickenreduktion durchgeführt wird.System according to claims 2 to 4,
characterized,
that a reduction in thickness is carried out both on the driver (3 ') and on each roll stand (9). Anlage nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet,
daß die Durchmesser der Treiberrollen bzw. Durchmesser der Walzen gleich oder unterschiedlich sind.System according to one of claims 2 to 5,
characterized,
that the diameter of the driver rollers or the diameter of the rollers are the same or different. Anlage nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet,
daß die Oberflächen der Rollen des Treibers bzw. der Walzen glatt sind oder zwecks Einstellung einer gewünschten Bandrauhigkeit aufgerauht sind.System according to one of claims 2 to 5,
characterized,
that the surfaces of the rollers of the driver or of the rollers are smooth or are roughened in order to set a desired strip roughness. Anlage nach den Ansprüchen 2, 3, 4 bis 7,
dadurch gekennzeichnet,
daß Rollen bzw. Walzen zur Dickenreduzierung in Gerüste mit walzenspaltbeeinflussenden Stellgliedern integriert sind.System according to claims 2, 3, 4 to 7,
characterized,
that rollers or rollers for reducing the thickness are integrated in stands with actuators influencing the roll gap. Anlage nach den Ansprüchen 2, 3, 4 bis 8,
dadurch gekennzeichnet,
daß am Treiber und/oder an jedem Walzgerüst eine Einrichtung zur Walzspaltschmierung (6a, 6b) vorgesehen ist, wobei diese vorzugsweise über der Bandbreite zonenweise aktivierbar ist. System according to claims 2, 3, 4 to 8,
characterized,
that a device for roll gap lubrication (6a, 6b) is provided on the driver and / or on each roll stand, which can preferably be activated zone by zone over the strip width. Anlage nach Anspruch 9,
dadurch gekennzeichnet,
daß nach dem Treiber und/oder an jedem Walzgerüst, in Bandlaufrichtung gesehen, eine Einrichtung zur Entfernung des Schmiermittels (7a, 7b) vorgesehen ist.System according to claim 9,
characterized,
that a device for removing the lubricant (7a, 7b) is provided after the driver and / or on each roll stand, as seen in the strip running direction. Anlage nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet,
daß nach dem Walzgerüst, in Bandlaufrichtung gesehen, eine Bandkühlstrecke (10) angeordnet ist.Installation according to one of claims 4 to 10,
characterized,
that a strip cooling section (10) is arranged after the roll stand, as seen in the strip running direction. Anlage nach einem der Ansprüche 4 bis 11,
dadurch gekennzeichnet,
daß ein Dickenmeßgerät (11) hinter dem Walzgerüst, in Bandlaufrichtung, vorgesehen ist.System according to one of claims 4 to 11,
characterized,
that a thickness measuring device (11) is provided behind the roll stand, in the strip running direction. Verfahren nach den Anspruch 1;
dadurch gekennzeichnet,
daß das Band zwischen Ende der Kühlstrecke und Haspelanlage zusätzlich durch eine Streckrichterzone läuft.Method according to claim 1;
characterized,
that the belt also runs through a stretch judge zone between the end of the cooling section and the reel system. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß mittels eines Regelkreises die Anstellung der dickenreduzierenden Rollen bzw. Walzen oder deren Stellglieder in Abhängigkeit von den Bandeigenschaften geregelt wird.Method according to claim 1,
characterized,
that the setting of the thickness-reducing rollers or rollers or their actuators is controlled as a function of the strip properties by means of a control loop. Verfahren nach Anspruch 13,
dadurch gekennzeichnet,
daß mittels eines Regelkreises die Einstellung der Streckrichterrollen zueinander und zum Band in Abhängigkeit von den Bandeigenschaften geregelt wird. A method according to claim 13,
characterized,
that the setting of the stretching judge rollers relative to one another and to the belt is regulated as a function of the belt properties by means of a control loop. Verfahren nach den Ansprüchen 14 oder 15,
dadurch gekennzeichnet,
daß als Bandeigenschaften die Temperaturverteilung, die Bandkontur oder die Bandzugspannungen eingehen.Method according to claims 14 or 15,
characterized,
that the strip properties include the temperature distribution, the strip contour or the strip tension. Verfahren nach einem der Ansprüche 1, 13 bis 16,
dadurch gekennzeichnet,
daß als zusätzliches Stellglied zur Einstellung der Bandeigenschaften in der Kühlstrecke die Bandtemperaturverteilung über der Breite vor einer Umformung an dem Walzgerüst oder in der Streckrichterzone verwendet wird.Method according to one of claims 1, 13 to 16,
characterized,
that the strip temperature distribution across the width is used as an additional actuator for setting the strip properties in the cooling section before forming on the roll stand or in the stretching-judge zone. Verfahren nach einem der Ansprüche 1, 13 bis 17,
dadurch gekennzeichnet,
daß die Dickenreduzierung über der Bandlänge unterschiedlich ist.Method according to one of claims 1, 13 to 17,
characterized,
that the thickness reduction is different over the length of the tape.
EP00100943A 1999-02-01 2000-01-19 Method and installation for forming metal strip Expired - Lifetime EP1025918B1 (en)

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EP1025918A3 (en) 2003-09-17
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DE50010022D1 (en) 2005-05-19
BR0000229A (en) 2000-09-05
US6237384B1 (en) 2001-05-29
CA2297519A1 (en) 2000-08-01
ATE293017T1 (en) 2005-04-15
EP1025918B1 (en) 2005-04-13
ES2239943T3 (en) 2005-10-16
CA2297519C (en) 2006-10-03
JP4712149B2 (en) 2011-06-29

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