EP1025918B1 - Method and installation for forming metal strip - Google Patents

Method and installation for forming metal strip Download PDF

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Publication number
EP1025918B1
EP1025918B1 EP00100943A EP00100943A EP1025918B1 EP 1025918 B1 EP1025918 B1 EP 1025918B1 EP 00100943 A EP00100943 A EP 00100943A EP 00100943 A EP00100943 A EP 00100943A EP 1025918 B1 EP1025918 B1 EP 1025918B1
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EP
European Patent Office
Prior art keywords
strip
driver
rollers
rolls
thickness
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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
Application number
EP00100943A
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German (de)
French (fr)
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EP1025918A3 (en
EP1025918A2 (en
Inventor
Jürgen Seidel
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SMS Siemag AG
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SMS Demag AG
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Publication of EP1025918A3 publication Critical patent/EP1025918A3/en
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Publication of EP1025918B1 publication Critical patent/EP1025918B1/en
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    • 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 system for forming metal strip in a hot strip rolling mill, consisting of a finishing train, a Cooling section, a driver and a coiler.
  • the strip partly leaves the finishing train with uneven planarity or voltage distribution over the bandwidth. Furthermore, the flatness state changes or the structure shape and distribution within the cooling section. The Uneven properties of the hot strip across the width then lead directly or indirectly to different flatness ratios of the cold strip.
  • US Pat. No. 5,771,731 describes a production plant for the production of hot-rolled flat products, consisting of a multi-stand rolling mill, an outlet roller table with facilities for cooling the hot strip and downstream Winding machines for winding the tape, wherein in the rolling direction Seen behind the winding machines a compact forming stage in the form of a a single or multi-stand rolling mill for rolling thin strips arranged is.
  • the invention is based on the subtask, a method and a system for Adjustment of uniform flatness and tension conditions in the hot strip in order to obtain a flat band in the cold state.
  • Another Partial task is the structure or the mechanical properties as well as the Surface structure of the tape targeted to influence and improve.
  • the essence of the invention is the provision of a method and a plant, wherein the strip material after exiting the cooling zone and before the reeling a Thickness reduction is subjected.
  • a small reduction in thickness is sufficient to those in the finishing train and / or in the cooling section - especially at low reel temperatures - incurred To eliminate unevenness or uneven stress distribution in the belt and thus improving the quality of the tape even when cold.
  • the forming in the finishing train takes place in the austenite or ferrite area, in the second reduction in thickness behind the cooling section, however, is usually exclusive rolled ferritically.
  • the proposed thickness reduction is achieved by, in a first embodiment the gap between the two rolls of a modified (reinforced) Driver itself is set so that a rolling process, i. a thickness reduction, takes place.
  • the driver rollers not only cause the tape to drive, but in addition a thickness decrease.
  • the diameters of the upper and lower rollers or rollers can be equal or be different.
  • the surfaces of the driver rollers or rolls can be smooth or for the purpose of setting a desired tape roughness be roughened.
  • the driver rollers or rollers are influencing the nip Provided actuators. Influencing factors are for example the Schlifform the rollers or their contact pressure. Furthermore, CVC cuts are conceivable or a stripper bend. As a predictor, the cooling of the Working rolls in the scaffolding, for example, a multi-zone cooling. To improve the surface finish of the rollers are online grinding or polishing equipment conceivable.
  • a second belt cooling section should preferably be arranged after the rolling zone, a second belt cooling section. This works either with a low or high pressure system. Such second cooling section is recommended, because they are both for removing the nip for removing the tertiary scale, for further removal of lubricating oil and also for further influencing the band properties.
  • the band between the end of Cooling section and the coiler not only by a driver, but in addition through a stretcher straightener zone.
  • this stretcher zone the belt becomes directed by pulling it with strong train over straightening and bending rolls, the force a diversion.
  • a scaffold to reduce the thickness at the end of a hot rolling process between cooling section and coiler plant is to set a plan Bandes suggested that the employment or actuators of the rolls of the Nachwalzgerüstes or the driver rollers by means of a control loop in dependence be governed by the band properties.
  • the band properties are for example, the temperature distribution, the strip contour or the strip tension distribution. These are added cyclically at the end of the process and act within the control loop on manipulated variables to change the Roll gap size.
  • Thickness reduction over the tape length can vary. At the tape head, for example, only a small reduction in the thickness is intended to mitigate the onslaught. Subsequently, the distance between the driver rollers or the rollers of the Nachwalzgerüstes is reduced to target thickness.
  • the proposed method and apparatus can generally find use in the production of metals. In particular, the machining of steel and aluminum is provided.
  • the single FIGURE shows a plant for forming metal strip, wherein the Plant a finishing train 1 with subsequent cooling section 2, a driver 3 and a coiler 4 includes.
  • the metal strip 5 is after leaving the finishing train 1 passed through a cooling section 2.
  • the thickness reduction is carried out by means of a driver reduction stand 3 '.
  • a Lubrication device 6a, 6b after the Examerreduziergerüst 3 'is a device arranged to remove the lubricant 7a, 7b.
  • the arrangement a cooling element 10 after exit of the tape from the Schwarzerreduziergerüst 3 'advantageous.
  • a deflection roller 8 is provided, which may be formed as planarity measuring roll.
  • the arrangement of a thickness gauge 11 connects. Between the individual parts of the system guide rollers 12 are provided for the band 5.

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 system for forming metal strip in a hot strip rolling mill, consisting of a finishing train, a Cooling section, a driver and a coiler.

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 rolling mill up to to roll certain thicknesses, then after a reeling a Cold strip rolling mill for rolling to the final dimension. This will be on the cold strip rolling mill supplied metal strip ever higher demands in terms of its mechanical and geometric properties, in particular his 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 to the desired end properties of the metal strip, resulting from the successive processes of warm and Cold rolling mill, already set in the hot rolling process or a hot strip the optimal conditions for the subsequent Brings cold rolling. Also, the boundary conditions during hot rolling more difficult. There are increasingly thinner and wider products for customization desired to the final product, resulting in a greater reduction in thickness and a Use of larger rolling forces in the end stands of the hot strip rolling mill requires. These effects adversely affect the flatness of the hot strip and thus also on the quality of the tape in the cold state.

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 strip partly leaves the finishing train with uneven planarity or voltage distribution over the bandwidth. Furthermore, the flatness state changes or the structure shape and distribution within the cooling section. The Uneven properties of the hot strip across the width then lead directly or indirectly to different flatness ratios of the cold strip.

Aus der US - A - 4 074 555 ist ein Verfahren und eine Warmbandstraße zur Ver bessserung der Qualitätseigenschaften von Warmband bekannt. Hierzu wird das heiße Warmband nach dem Walzen bzw. vor dem Aufwickeln streckbiegegerichtet. Bei der Warmbandstraße mit zumindest einem Walzgerüst, einem Auslaufrollengang, ggf. einem Rückzugtreiber und einem Aufwickelhaspel ist vorgesehen, dass dem Auslaufrollengang eine Streckbiege - Richtstation mit in das die Richtstation durchlaufende Warmband eintauchenden Biegerollen zugeordnet ist.From US-A-4 074 555 a method and a hot strip mill for Ver Improvement of the quality characteristics of hot strip known. This is the Hot hot strip after rolling or before winding stretch-bending. In the hot strip mill with at least one roll stand, an outlet roll, possibly a retraction driver and a take-up reel is provided that the exit roller conveyor a stretch bending - straightening station with in the straightening station continuous hot strip is associated with dipping bending rolls.

Die US - A - 5 771 731 beschreibt eine Produktionsanlage zur Erzeugung von warmgewalzten Flachprodukten, bestehend aus einer mehrgerüstigen Walzstraße, einem Auslaufrollgang mit Einrichtungen zur Kühlung des Warmbandes und nachgeordneten Wickelmaschinen zum Aufwickeln des Bandes, wobei in Walzrichtung gesehen hinter den Wickelmaschinen eine kompakte Umformstufe in Form eines ein - oder mehrgerüstigen Walzwerkes für das Walzen dünner Bänder angeordnet ist.US Pat. No. 5,771,731 describes a production plant for the production of hot-rolled flat products, consisting of a multi-stand rolling mill, an outlet roller table with facilities for cooling the hot strip and downstream Winding machines for winding the tape, wherein in the rolling direction Seen behind the winding machines a compact forming stage in the form of a a single or multi-stand rolling mill for rolling thin strips arranged is.

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 Adjustment of uniform flatness and tension conditions in the hot strip in order to obtain a flat band in the cold state. Another Partial task is the structure or the mechanical properties as well as the Surface structure of the tape targeted to influence and improve.

Diese Aufgaben werden durch die Merkmale des Verfahrensanspruchs 1 und durch die Merkmale des Anspruchs 8 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen offenbart. These objects are achieved by the features of method claims 1 and solved by the features of claim 8. Advantageous embodiments of the invention are 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 essence of the invention is the provision of a method and a plant, wherein the strip material after exiting the cooling zone and before the reeling a 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, despite completion of the actual rolling process the passage through the finishing train thus a further rolling process instead.

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 small reduction in thickness is sufficient to those in the finishing train and / or in the cooling section - especially at low reel temperatures - incurred To eliminate unevenness or uneven stress distribution in the belt and thus improving the quality of the tape even when cold.

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 structure or mechanical properties are also larger thickness decreases conceivable.

Die Umformung in der Fertigstraße erfolgt im Austenit- oder Ferritgebiet, bei der zweiten Dickenreduzierung 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 reduction in thickness behind the cooling section, however, is usually exclusive 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 thickness reduction is achieved by, in a first embodiment the gap between the two rolls of a modified (reinforced) Driver itself is set so that a rolling process, i. a thickness reduction, takes place. The driver rollers not only cause the tape to drive, but in addition a thickness decrease.

Die Durchmesser der oberen und unteren rollen oder Walzen können gleich oder unterschiedlich sein. Die Oberflächen der Treiberrollen bzw. der - walzen können glatt ausgebildet sein oder zwecks Einstellung einer gewünschten Bandrauhigkeit aufgerauht sein. The diameters of the upper and lower rollers or rollers can be equal or be different. The surfaces of the driver rollers or rolls can be smooth or for the purpose of setting a desired tape roughness be roughened.

Vorzugsweise sind die Treiberrollen bzw. die - walzen 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.Preferably, the driver rollers or rollers are influencing the nip Provided actuators. Influencing factors are for example the Schlifform the rollers or their contact pressure. Furthermore, CVC cuts are conceivable or a stripper bend. As a predictor, the cooling of the Working rolls in the scaffolding, for example, a multi-zone cooling. To improve the surface finish of the rollers are online grinding or polishing equipment conceivable.

Es empfiehlt sich zwecks Steigerung der Dickenreduzierung oder der Einstellung einer gewünschten Oberflächentextur an dem Treibergerüst 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 adjustment a desired surface texture on the driver scaffold means for To arrange roll gap lubrication. Preferably, this is an actuator Zone-wise activatable lubrication proposed over the bandwidth.

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 residues of the lubricant, preferably oil, on the Band are present. Therefore, it is recommended, after such a device to provide a device for removing the excess lubricant, for example, by arranging 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 reduction is achieved by means of a Nachwalzgerüstes, should preferably be arranged after the rolling zone, a second belt cooling section. This works either with a low or high pressure system. Such second cooling section is recommended, because they are both for removing the nip for removing the tertiary scale, for further removal of lubricating oil and also for further influencing the band properties.

Zur besseren Kontrolle ist ein Dickenmeßgerät nach dem Nachwalzgerüst, in Bandlaufrichtung gesehen, vorgesehen. For better control, a thickness gauge after the Nachwalzgerüst, in Tape running direction seen, provided.

Vorteilhafterweise wird vorgeschlagen, daß das Band zwischen dem Ende der Kühlstrecke und der Haspelanlage nicht nur durch einen Treiber, 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.Advantageously, it is proposed that the band between the end of Cooling section and the coiler not only by a driver, but in addition through a stretcher straightener zone. In this stretcher zone the belt becomes directed by pulling it with strong train over straightening and bending rolls, the force a diversion.

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 to reduce the thickness at the end of a hot rolling process between cooling section and coiler plant is to set a plan Bandes suggested that the employment or actuators of the rolls of the Nachwalzgerüstes or the driver rollers by means of a control loop in dependence be governed by the band properties. The band properties are for example, the temperature distribution, the strip contour or the strip tension distribution. These are added cyclically at the end of the process and act within the control loop on manipulated variables to change the Roll gap size.

In analoger Weise kann die Einstellung der Streckrichterrollen zueinander und zum Band in Abhängigkeit der Bandeigenschaften geregelt werden.In an analogous manner, the setting of the drafting roller to each other and be regulated to the band depending on the band properties.

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.Thickness reduction over the tape length can vary. At the tape head, for example, only a small reduction in the thickness is intended to mitigate the onslaught. Subsequently, the distance between the driver rollers or the rollers of the Nachwalzgerüstes is reduced to target thickness.
The proposed method and apparatus can generally find use in the production of metals. In particular, the machining of steel and aluminum is provided.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung. Further details and advantages of the invention will become apparent from the following Description.

Die einzige Figur 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 Metallband 5 wird nach Verlassen der Fertigstraße 1 durch eine Kühlstrecke 2 geführt.The single FIGURE shows a plant for forming metal strip, wherein the Plant a finishing train 1 with subsequent cooling section 2, a driver 3 and a coiler 4 includes. The metal strip 5 is after leaving the finishing train 1 passed through a cooling section 2.

Die Dickenreduzierung wird 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 Kühlelementes 10 nach Austritt des Bandes aus dem Treiberreduziergerüst 3' vorteilhaft.The thickness reduction is carried out by means of a driver reduction stand 3 '. Before the driver reduction frame 3 ', as seen in the tape running direction, there is a Lubrication device 6a, 6b, after the Treiberreduziergerüst 3 'is a device arranged to remove the lubricant 7a, 7b. Furthermore, the arrangement a cooling element 10 after exit of the tape from the Treiberreduziergerüst 3 'advantageous.

Zur Einführung des Bandes in die Haspelanlage 4 ist eine Umlenkrolle 8 vorgesehen, die als Planheitsmeßrolle ausgebildet sein kann.For the introduction of the tape in the coiler 4 a deflection roller 8 is provided, which may be formed as planarity measuring roll.

Zur Dickenkontrolle schließt sich die Anordnung eines Dickenmeßgerätes 11 an. Zwischen den einzelnen Anlagenteilen sind Führungsrollen 12 für das Band 5 vorgesehen.For thickness control, the arrangement of a thickness gauge 11 connects. Between the individual parts of the system guide rollers 12 are provided for the band 5.

Claims (14)

  1. Method of reshaping metal strip (5) in a hot strip rolling plant, wherein the metal strip (5) after running through a finishing train (1) and a cooling path (2) is fed by way of a driver (3), which consists of an upper and a lower driver roller, to a coiling installation (4), wherein the metal strip (5) in the region between ends of the cooling path (2) and the coiling installation (4) is subjected to a reduction in thickness, characterised in that the rollers or rolls (3') of the driver (3) are used for the thickness reduction.
  2. Method according to claim 1, characterised in that the metal strip (5) additionally runs through a straightening zone between the end of the cooling path (2) and the coiling installation (4).
  3. Method according to claim 1 or 2, characterised in that the adjustment of the thickness-reducing driver rollers / driver rolls (3') or the setting elements thereof is regulated by means of a regulating circuit in dependence on the strip characteristics.
  4. Method according to claim 2, characterised in that the setting of the straightening rollers with respect to one another and with respect to the metal strip (5) is regulated by means of a regulating circuit in dependence on the strip characteristics.
  5. Method according to claim 4, characterised in that the temperature distribution, strip contour or strip tensile stresses enters or enter as strip characteristics.
  6. Method according to one of claims 1, 13 to 16, characterised in that the strip temperature distribution over the width before reshaping in the straightening zone is used as additional setting element for setting of the strip characteristics in the cooling path (2).
  7. Method according to one of claims 1 to 6, characterised in that the thickness reduction is different over the strip length.
  8. Plant for reshaping metal strip (5), consisting of a finishing train (1) with a downstream cooling path (2), driver (3) and coiling installation (4), wherein in the region between the end of the cooling path (2) and the coiling installation (4) at least two rollers or rolls (3') are so arranged one above the other that they form a rolling gap which is smaller than the strip thickness in front of the rollers or rolls (3') as seen in strip running direction, characterised in that these rollers or rolls are the driver rollers (3'), which not only serve as driver (3), but also carry out a thickness reduction.
  9. Plant according to claim 8, characterised in that the diameters of the driver rollers / driver rolls (3') are the same or different.
  10. Plant according to claim 8 or 9, characterised in that the surfaces of the driver rollers / driver rolls (3') are smooth or, for the purpose of setting a desired strip roughness, are roughened.
  11. Plant according to one of claims 8 to 10, characterised in that a device for rolling gap lubrication (6a, 6b) is provided at the driver (3), wherein this device is preferably zonally activatable over the strip width.
  12. Plant according to claim 11, characterised in that a device (7a, 7b) for removing the lubricant is provided after the driver (3) as seen in strip running direction.
  13. Plant according to one of claims 4 to 10, characterised in that a strip cooling path (10) is arranged after the driver (3) as seen in strip running direction.
  14. Plant according to one of claims 8 to 13, characterised in that a thickness measuring instrument (11) is provided after the driver (3) as seen in strip running direction.
EP00100943A 1999-02-01 2000-01-19 Method and installation for forming metal strip Expired - Lifetime EP1025918B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19903926 1999-02-01
DE19903926A DE19903926A1 (en) 1999-02-01 1999-02-01 Process and plant for forming metal strips

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EP1025918A2 EP1025918A2 (en) 2000-08-09
EP1025918A3 EP1025918A3 (en) 2003-09-17
EP1025918B1 true EP1025918B1 (en) 2005-04-13

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EP (1) EP1025918B1 (en)
JP (1) JP4712149B2 (en)
AT (1) ATE293017T1 (en)
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US6543122B1 (en) 2001-09-21 2003-04-08 Alcoa Inc. Process for producing thick sheet from direct chill cast cold rolled aluminum alloy
DE102006058134A1 (en) * 2006-12-09 2008-06-19 Sms Demag Ag Drive roller especially for trimming shears
DE102008000219A1 (en) * 2008-02-01 2009-08-06 Hilti Aktiengesellschaft Cold rolling process for the production of a profile
DE102017212529A1 (en) 2017-07-20 2019-01-24 Sms Group Gmbh Method for producing a metallic strip
CN110038908B (en) * 2018-01-16 2022-09-16 上海金艺检测技术有限公司 Online monitoring and diagnosing method for speed increasing box of hot rolling descaling pump
CN112828053B (en) * 2021-01-04 2022-06-14 宝钢湛江钢铁有限公司 Method for detecting full-length plate shape of cooled strip steel
CN112916625A (en) * 2021-02-23 2021-06-08 首钢京唐钢铁联合有限责任公司 Control method and control system for cold-rolled strip steel plate shape control

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ES2239943T3 (en) 2005-10-16
US6237384B1 (en) 2001-05-29
JP2000218302A (en) 2000-08-08
BR0000229A (en) 2000-09-05
DE50010022D1 (en) 2005-05-19
DE19903926A1 (en) 2000-08-03
CA2297519C (en) 2006-10-03
EP1025918A3 (en) 2003-09-17
JP4712149B2 (en) 2011-06-29
EP1025918A2 (en) 2000-08-09
ATE293017T1 (en) 2005-04-15
CA2297519A1 (en) 2000-08-01

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