EP1456421B1 - Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill - Google Patents

Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill Download PDF

Info

Publication number
EP1456421B1
EP1456421B1 EP20020785402 EP02785402A EP1456421B1 EP 1456421 B1 EP1456421 B1 EP 1456421B1 EP 20020785402 EP20020785402 EP 20020785402 EP 02785402 A EP02785402 A EP 02785402A EP 1456421 B1 EP1456421 B1 EP 1456421B1
Authority
EP
European Patent Office
Prior art keywords
cooling
metal strip
strip
rollers
straightening
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.)
Active
Application number
EP20020785402
Other languages
German (de)
French (fr)
Other versions
EP1456421A1 (en
Inventor
Andreas Mathies
Dirk Schmidt
Gerhard Horn
Roman Dehmel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Siemag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE10163070 priority Critical
Priority to DE2001163070 priority patent/DE10163070A1/en
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Priority to PCT/EP2002/013035 priority patent/WO2003054236A1/en
Publication of EP1456421A1 publication Critical patent/EP1456421A1/en
Application granted granted Critical
Publication of EP1456421B1 publication Critical patent/EP1456421B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54Furnaces for treating strips or wire
    • C21D9/56Continuous furnaces for strip or wire
    • C21D9/573Continuous furnaces for strip or wire with cooling
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242Flattening; Dressing; Flexing
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0252Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with application of tension
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62Quenching devices
    • C21D1/667Quenching devices for spray quenching
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D11/00Process control or regulation for heat treatments
    • C21D11/005Process control or regulation for heat treatments for cooling

Description

  • Die Erfindung betrifft ein Verfahren und eine Einrichtung zum kontrollierten Richten und Kühlen von aus einem Warmband-Walzwerk auslaufenden, breiten Metallband, insbesondere von Stahlband oder Blech, unter Anwendung von Quetschrollen, die in Bandlaufrichtung hinter einer Doppelrolle mit zwei vertikal übereinander angeordneten Einzerollen angeordnet sind und eine in Längsrichtung wirkende Zugspannung erzeugen.The invention relates to a method and a device for the controlled straightening and cooling of expiring from a hot strip rolling, wide metal strip, in particular steel strip or sheet, using crimping rollers, which are arranged in the strip running direction behind a double role with two vertically superposed single rollers and create a longitudinal tensile stress.
  • Das eingangs bezeichnete Verfahren und die Einrichtung sind im wesentlichen aus der DE 33 13 024 A1 bekannt. Dabei handelt es sich um ein Verfahren und eine Vorrichtung zum Abschrecken von durchlaufenden Stahlblechen, insbesondere von Grob- und Mittelblechen, unter gleichzeitigem kontrolliertem Richten, bei dem die Bleche vor dem Abschrecken im warmen Zustand durch mindestens zwei hintereinander angeordnete vertikale Doppelrollen in einer Ebene ausgerichtet werden. Anschließend wird das Blech unter einer kontrollierten Zugspannung von mindestens einer Doppelrolle durch eine Abschreckeinrichtung gezogen. Dieses Verfahren soll durchlaufende Stahlbleche exakt auf die vorherbestimmten mechanischen Eigenschaften abschrecken, ohne dass sie sich verziehen oder dass Verwerfungen auftreten, wobei gleichzeitig schon vorher vorhandene Unebenheiten verringert werden sollen. Trotz dieser Maßnahmen treten immer wieder Unebenheiten des Bleches auf, die auf ein unzulängliches Aufbringen der Zugspannungen, auf eine nachteilige Kühlung und auf andere ungünstige Regelmaßnahmen zurückzuführen sind. Die in der Praxis angewendeten Kühlvorrichtungen, die im wesentlichen aus Düsen-Elementen oder für die Nachkühlung aus laminaren Wasservorhängen bestehen, können kaum noch verbessert werden. Für laminare Kühleinheiten wird im Prinzip ein U-Röhrchen verwendet. Mit Düsen lassen sich allerdings bei Auswahl entsprechender Parameter die höchsten erreichbaren Abkühlleistungen erzielen. Nachteilig wirkt sich noch das schlechte Steuerungs- und Regelverhalten im allgemeinen und bei niedrigen Durchflussmengen im besonderen aus.The initially described method and the device are essentially known from DE 33 13 024 A1. This is a method and a device for quenching continuous steel sheets, in particular coarse and medium plates, with simultaneous controlled straightening, in which the sheets are aligned in a plane before quenching in the warm state by at least two successively arranged vertical double roles , Subsequently, the sheet is pulled under a controlled tension of at least one double roll through a quenching device. This method is intended to deter transit steel sheets exactly to the predetermined mechanical properties, without warping or distortion occur, while at the same time already existing bumps should be reduced. Despite these measures occur repeatedly unevenness of the sheet, which are due to inadequate application of the tensile stresses on a disadvantageous cooling and other unfavorable control measures. The applied in practice cooling devices consisting essentially of nozzle elements or for the after-cooling of laminar water curtains can hardly be improved. For laminar cooling units, a U-tube is used in principle. With nozzles, however, can be selected with appropriate Parameters achieve the highest achievable cooling capacities. Another disadvantage is the poor control and regulation behavior in general and at low flow rates in particular.
  • Der Erfindung liegt die Aufgabe zugrunde, den Einsatzbereich konventioneller Blechkühlanlagen bis hin zu höherer Ebenheit des Bleches bei verstärkter Kühlwirkung zu erweitern.The invention has for its object to expand the application of conventional sheet metal cooling systems to higher flatness of the sheet with increased cooling effect.
  • Die gestellte Aufgabe wird erfindungsgemäß gelöst mit einem Verfahren nach Anspruch 1 bzw. einer Einrichtung nach Anspruch 7. Das Metallband oder das Blech wird zwischen einer Vor-Richtmaschine und einer Spritzkühlung ohne Kühlung durch Regeln der Zugspannung unter definierte Zugspannungen gesetzt und innerhalb der Spritzkühlung zwischen aufeinander folgenden Quetschrollen-Paaren gekühlt und zusätzlich die Zugspannung kontrolliert.The object is achieved according to the invention with a method according to claim 1 or a device according to claim 7. The metal strip or sheet is placed between a pre-straightener and a spray cooling without cooling by controlling the tension under defined tensile stresses and within the spray cooling between each other cooled following pairs of squeezing rollers and additionally controls the tension.
  • Dabei wird vorzugsweise die Zugspannung in dem Metallband oder Blech innerhalb der Spritzkühlung zwischen jeweils zwei in Bandlaufrichtung aufeinander folgenden Quetschrollenpaaren zusätzlich geregelt und das Metallband zusätzlich gekühlt.In this case, preferably, the tension in the metal strip or sheet within the spray cooling between each two in the strip running direction successive pairs of squeezing rollers additionally regulated and the metal strip additionally cooled.
  • Dadurch wird eine plastische Deformation vor dem Einlaufen des Metallbandes oder des Blechs in die Kühlung unmittelbar bewirkt. Die plastische Deformation reduziert die einlaufenden Unebenheiten des Metallbandes oder des Blechs. Der Vorteil besteht weiterhin durch die unmittelbare Anordnung des Richtprozesses vor der Kühlung, wodurch der erneute Aufbau von Eigenspannungen und Deformationen, bedingt durch die ungleich-mäßige Abkühlung auf der Oberfläche des Metallbandes oder des Blechs, vermieden wird.As a result, a plastic deformation is effected directly before the shrinkage of the metal strip or the sheet in the cooling. The plastic deformation reduces the incoming unevenness of the metal strip or sheet. The advantage continues to be the immediate arrangement of the straightening process before cooling, whereby the re-build up of residual stresses and deformations caused by the uneven-moderate cooling on the surface of the metal strip or the sheet is avoided.
  • Die Kühlwirkung ist praktisch durch die Induktion von Spannungen und damit verbundenen Deformationen in dem Blech begrenzt, bedingt durch die ungleichförmige Kühlwirkung des Kühlmediums (Wasser) auf der Blechoberfläche. Dieser (nachteilige) Effekt tritt bei Anwendung höherer Kühlleistung auf dünne und gleichzeitig breite Bleche besonders in Erscheinung. Das kritische Produkt einer Anlage ist durch ein Blech mit der geringsten Dicke bei maximaler Breite und gleichzeitig hoher Intensität der Kühlung gegeben. Die Intensität der Kühlung ist durch eine hohe Temperaturdifferenz zwischen Start- und Kühlstopp-Temperatur bei kurzer Kühlzeit definiert. In der Praxis sollen Quetschrollen diesen Effekt der Deformation behindern. Der Einfluss dieser Form der Kompensation ist jedoch begrenzt. Die erfindungsgemäße Anordnung der Vor-Richtmaschinevor der Kühlung bewirkt die plastische Deformation und reduziert einlaufende Deformationen und Spannungen unmittelbar vor der Kühlung.The cooling effect is practically limited by the induction of stresses and associated deformations in the sheet, due to the non-uniform cooling effect of the cooling medium (water) on the sheet surface. This (disadvantageous) effect is particularly evident when using higher cooling capacity on thin and at the same time wide metal sheets. The critical product of a plant is given by a sheet of the smallest thickness with maximum width and high intensity of cooling. The intensity of the cooling is defined by a high temperature difference between start and cooling stop temperature with a short cooling time. In practice, pinch rollers should hinder this effect of deformation. However, the influence of this form of compensation is limited. The inventive arrangement of the pre-straightening machine before cooling causes plastic deformation and reduces incoming deformations and stresses immediately before cooling.
  • Besonders wirkungsvoll können die Deformationen bei Einlauf in die Kühlung bekämpft werden, indem die Zugspannung durch Umschalten der Geschwindigkeit zur jeweils nächsten, letzten, tragenden Quetschrolle mit fortschreitendem Durchlauf des Metallbandes oder des Blechs geregelt wird.The deformation can be combated particularly effectively when entering the cooling by the tension is controlled by switching the speed to the next, last, bearing squeeze roller with progressive passage of the metal strip or the sheet.
  • Eine Ausgestaltung besteht darin, dass die Quetschrollen mit einer Teilung festgelegt werden, wobei zwischen zwei Quetschrollen abhängig von der Teilung eine Kühleinheit gebildet wird.One embodiment is that the pinch rollers are defined with a pitch, wherein between two pinch rollers depending on the division, a cooling unit is formed.
  • In Weiterbildung der Erfindung kann vorgesehen sein, dass diese Teilung auf eine halbe Länge der resultierenden Eigenform für ein Band oder ein Blech mit geringster Dicke, bei maximaler Breite und hoher Kühlintensität abgestellt wird.In a further development of the invention it can be provided that this division is turned off to half the length of the resulting eigenform for a band or a sheet with the smallest thickness, maximum width and high cooling intensity.
  • Die Einrichtung zum kontrollierten Richten und Kühlen von einem aus einem Warmband-Walzwerk auslaufenden breiten Metallband, insbesondere von einem Stahlband oder von einem Blech, umfasst eine Spritzkühlung mit einer Doppelrolle, welche zwei übereinander angeordnete Einzelrollen aufweist, mindestens ein in Bandlaufrichtung hinter der Doppelrolle angeordnetes erstes Quetschrollen-Paar und eine zwischen der Doppelrolle und dem ersten Quetschrollen-Paar angeordnete kühleinheit, wobei in dem durch die Spritzkühlung geführten Metallband oder Blech eine in längsrichtung wirkende Zugspannung zwischen der Doppelrollle und dem ersten Quetschrollen-Paar erzeugbar ist.The device for the controlled straightening and cooling of a wide strip of metal running out of a hot strip rolling mill, in particular of a steel strip or a sheet, comprises a spray cooling with a double roll, which has two single rolls arranged one above the other, at least one first arranged behind the double roll in the strip running direction A pair of squeezing rollers and a cooling unit arranged between the double roller and the first pair of squeezing rollers, wherein in the metal belt or plate guided by the spray cooling a longitudinal tension between the Doppelrollle and the first pair of squeezing rollers can be generated.
  • Die gestellte Aufgabe wird bei einer solchen Einrichtung erfindungsgemäß dadurch gelost, dass eine von dem Metallband durchlaufene, der Spritzkühlung vorgeschaltete Vor-Richtmaschine mit Richtrollen und zugeordneten Drehantriebsmotoren vorgesehen ist zum Setzen des Metallbandes unter definierte Zugspanhungen ohne Kühlung zwischen der Vor-Richtmaschine und der Doppelrolle. Dadurch kann eine Zugspannung schon vor der Kühlung übertragen werden, wodurch die Größe der vorhandenen Deformationen schon hier reduziert wird. Sodann findet eine noch genauere Bestimmung der Zugspannungen innerhalb der Kühleinheiten statt.The stated object is achieved according to the invention in such a device that a pre-straightening machine with straightening rollers and associated rotary drive motors passed through by the metal strip is provided for setting the metal strip under defined tension conditions without cooling between the pre-straightening machine and the double roller. As a result, a tensile stress can be transmitted even before the cooling, whereby the size of the existing deformations is already reduced here. Then there is an even more accurate determination of the tensile stresses within the cooling units.
  • Der Einfluss der Kühlung kann noch dadurch gesteigert werden, indem im Auslauf des Metallbandes die Kühleinheit mit fein einstellbaren Kühlelementen versehen ist.The influence of cooling can be further increased by the cooling unit is provided with finely adjustable cooling elements in the outlet of the metal strip.
  • Die Kühlung kann ferner dahingehend entwickelt werden, dass die Kühleinheit für eine hohe und / oder eine mittlere Kühlleistung im Sinn eines vorgegeben Produktspektrums ausgelegt ist.The cooling can also be developed in such a way that the cooling unit is designed for a high and / or an average cooling capacity in the sense of a given product spectrum.
  • Eine Verbesserung der Erfindung besteht noch darin, dass zwischen den letzten, tragenden Quetschrollen oder den Richtrollen am Ende des Metallbandes oder des Blechs und den Quetschrollen oder den Richtrollen am Anfang des Metallbandes oder des Blechs ebenfalls Zugspannungen erzeugbar sind.An improvement of the invention consists in the fact that between the last, bearing squeezing rollers or the straightening rollers at the end of the metal strip or the sheet and the squeezing rollers or the straightening rollers at the beginning of the metal strip or sheet tensile stresses are also generated.
  • In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt, die nachstehend näher erläutert werden.In the drawings, embodiments of the invention are shown, which are explained in more detail below.
  • Es zeigen:
  • Fig. 1
    eine System-Darstellung der Kühlung mit Quetschrollen und der Antriebssteuerung mit den erzeugten Zugspannungen,
    Fig. 2A
    eine perspektivische Ansicht des Stahlbandes oder des Blechs mit Verwerfungen in Form von Mittenwellen,
    Fig. 2B
    eine Seitenansicht von zwei im Teilungsabstand angeordneten Quetschrollen-Paaren
    Fig. 3
    die Anordnung der Kühlvorrichtungen für die jeweilige Kühlintensität und
    Fig. 4
    eine Ansicht einer Gesamtanlage zum Richten und Kühlen.
    Show it:
    Fig. 1
    a system representation of the cooling with pinch rollers and the drive control with the generated tensile stresses,
    Fig. 2A
    a perspective view of the steel strip or sheet with distortions in the form of center waves,
    Fig. 2B
    a side view of two arranged in the pitch separation rollers pairs
    Fig. 3
    the arrangement of the cooling devices for the respective cooling intensity and
    Fig. 4
    a view of a whole plant for straightening and cooling.
  • Das Metall-, insbesondere das Stahlband 1 oder das Blech wird zum kontrollierten Kühlen und Richten unter Anwendung von in Bandlaufrichtung 2 hinter einer Doppelrolle, die zwei vertikal übereinander angeordnete Einzelrollen 3 und 4 aufweist, angeordneten Quetschrollen 5 über eine in Längsrichtung (Bandlaufrichtung 2) wirkende Zugspannung 6 geführt. Dabei wird das Metallband 1 zwischen einer Vor-Richtmaschine 7 und einer Spritzkühlung 8 unter definierten Zugspannungen 6 durch Regeln der Zugspannung (über die Drehantriebsmotoren für Richtrollen) versetzt und innerhalb der Spritzkühlung 8 wird das Metallband 1 zwischen aufeinander folgenden Quetschrollen-Paaren 5a gekühlt und zusätzlich die Zugspannung 6 kontrolliert. Die Spritzkühlung 8 besteht aus jeweils zwischen zwei Quetschrollen-Paaren 5a angeordneten Kühleinheiten 9 (Fig. 1). Während des mit RollgangsGeschwindigkeit 10 ankommenden Metallbandes 1 wird die Zugspannung 6 über ein entsprechendes Drehmoment 11 durch eine Rückmeldungssteuerung 12 kontrolliert mit (A) Eingriff der Quetsch-Rollen 5 (i) bis (i+nc) bezeichnet. Sobald das Bandende 1a durchläuft mit (B) Eingriff der Quetsch-Rollen 5 ((i+1) bis (i+nc+1) bezeichnet), wird auf das Bandende 1 a die entsprechende Zugspannung 6 übertragen und außerhalb des Bandendes 1a nur noch die Vergleichsgeschwindigkeit gemessen, ohne die Rückmeldungsregelung 12 einzusetzen. Sowohl für das Bandende 1 a als auch für den Bandanfang 1 b wird die Zugspannung 6 durch Umschalten der Geschwindigkeit zur jeweils nächsten, letzten, tragenden Quetschrolle 5 mit fortschreitendem Durchlauf des Metallbandes 1 geregelt (vgl. Fig. 1).The metal, in particular the steel strip 1 or the sheet is for controlled cooling and straightening using in the direction of tape 2 behind a double role, the two vertically stacked single rollers 3 and 4, arranged squeezing rollers 5 acting in a longitudinal direction (tape running direction 2) Tensile 6 out. there is the metal strip 1 between a pre-straightener 7 and a spray cooling 8 under defined tensile stresses 6 by regulating the tension (on the rotary drive motors for straightening rollers) and within the spray cooling 8, the metal strip 1 is cooled between successive squeezing roller pairs 5a and additionally the Tension 6 controlled. The spray cooling 8 consists of cooling units 9 each arranged between two pairs of pinch rollers 5a (FIG. 1). During the metal belt 1 arriving at roller speed 10, the tension 6 is controlled via a corresponding torque 11 by a feedback control 12 controlled by (A) engagement of the pinch rollers 5 (i) to (i + nc). As soon as the band end 1a passes through (B) engagement of the pinch rollers 5 ((i + 1) to (i + nc + 1)), the corresponding tension 6 is transmitted to the band end 1 a and only outside the band end 1a the comparison speed is measured without using the feedback control 12. Both for the end of the tape 1 a and the beginning of the tape 1 b, the tension 6 is controlled by switching the speed to each next, last, bearing squeeze roller 5 with progressive passage of the metal strip 1 (see Fig .. 1).
  • Die Quetschrollen 5 sind mit einer bestimmten Teilung 13 angeordnet, wobei zwischen zwei Quetschrollen 5 abhängig von der Teilung 13 die Kühleinheit 9 ausgebildet wird. So kann z.B. die Teilung 13 auf eine halbe Länge 14 der resultierenden Wellenlänge 15 für ein Metallband 1 mit geringster Dicke, bei maximaler Breite und hoher Kühlintensität bezogen sein. In dem Stahlband 11 stellt sich die typische Wellenlänge 15 ein (Fig. 2A).The pinch rollers 5 are arranged with a certain pitch 13, wherein the cooling unit 9 is formed between two pinch rollers 5 depending on the pitch 13. Thus, e.g. the pitch 13 can be related to a half length 14 of the resulting wavelength 15 for a metal strip 1 with the smallest thickness, maximum width and high cooling intensity. In the steel strip 11, the typical wavelength 15 is established (FIG. 2A).
  • Die Kühleinheiten 9 sind jeweils für eine hohe oder eine mittlere Kühlintensität ausgelegt (Fig. 2B), wobei die Teilung 13 der halben Wellenlänge 15 entspricht (vgl. Fig. 2B). Der Wellenverlauf 16 ist in den Fig. 2A und 2B durch gepunktete Linien 17 deutlich gemacht.The cooling units 9 are each designed for a high or an average cooling intensity (FIG. 2B), the pitch 13 corresponding to half the wavelength 15 (see FIG. 2B). The waveform 16 is made clear in FIGS. 2A and 2B by dotted lines 17.
  • In Fig. 3 ist die Kühlwirkung der einzelnen unterschiedlichen Arten der Kühleinheiten 9 dargestellt. Im Temperatur-Zeit-Diagramm stellt die ausgezogene Linie den Temperaturverlauf in der Band- oder Blechmitte 20 und die gestrichelte Linie die Oberflächen-Temperatur 21 dar. In den Abschnitten (1) werden Spritzkühleinheiten 8a eingesetzt. Im Auslauf 18 des Stahlbandes 1 sind Kühleinheiten 9, bestehend aus U-Röhrchen - Einheiten 22 vorgesehen.FIG. 3 shows the cooling effect of the individual different types of cooling units 9. In the temperature-time diagram, the solid line represents the temperature profile in the strip or sheet center 20 and the dashed line the surface temperature 21. In sections (1), injection cooling units 8a are used. In the outlet 18 of the steel strip 1 cooling units 9, consisting of U-tube - units 22 are provided.
  • Aufgrund der Temperatur ΔT-Mitte (1) erreicht man die Temperatur in der Mitte des Stahlbandes 1 oder die Temperatur ΔT-Mitte (2).Due to the temperature ΔT center (1), the temperature in the middle of the steel strip 1 or the temperature ΔT center (2) is reached.
  • Die Temperatur ΔT-Oberfläche wird noch in der Zone der Spritzkühleinheiten 8a erreicht. Beim Einsatz der U-Röhrchen-Einheiten 22 wird die erforderliche Kühl-Stopp-Temperatur in kleinen Schritten durch die U-Röhrchen-Einheiten 22 erzielt. Eine Martensit-Bildung durch Oberflächen-Unterkühlung wird oberhalb der Temperatur T-Martensit verhindert.The temperature ΔT surface is still reached in the zone of the injection cooling units 8a. When using the U-tube units 22, the required cooling stop temperature is achieved in small steps through the U-tube units 22. Martensite formation by surface supercooling is prevented above the temperature T-martensite.
  • Zwischen den letzten, tragenden Quetschrollen 5 oder Richtrollen 23 am Ende 1 a des Metallbandes 1 oder des Blechs und den Quetschtrollen 5 oder den Richtrollen 24 am Anfang 1 b des Metallbandes 1 können in gleicher Verfahrensweise Zugspannungen 6 erzeugt werden.Between the last, supporting pinch rollers 5 or straightening rollers 23 at the end 1 a of the metal strip 1 or the sheet metal and the pinch rollers 5 or the straightening rollers 24 at the beginning 1 b of the metal strip 1 tensile stresses 6 can be generated in the same procedure.
  • Gemäß Fig. 4 ist eine Gesamtanlage dargestellt, in der in Bandlaufrichtung 2 auf die Vor-Richtmaschine 7 folgend die Spritzkühlung 8 mit den Quetschrollen-Paaren 5a und den Kühleinheiten 9 und dahinter eine Laminar-Kühlvorrichtung 25 folgen.According to FIG. 4, an overall system is shown in which the spray cooling 8 with the pinch roller pairs 5a and the cooling units 9 and, behind them, a laminar cooling device 25 follow in the direction of striping 2 on the pre-straightening machine 7.
  • BezugszeichenlisteLIST OF REFERENCE NUMBERS
  • 11
    Metallband, Stahlband oder BlechMetal band, steel band or sheet metal
    1a1a
    Bandendetape end
    1b1b
    BandanfangA tape
    22
    BandlaufrichtungTape direction
    33
    Einzelrolle einer DoppelrolleSingle role of a double role
    44
    Einzelrolle einer DoppelrolleSingle role of a double role
    55
    Quetschrollesqueegee
    5a5a
    Quetschrollen-PaarSqueeze roller pair
    66
    Zugspannungtension
    77
    Vor-RichtmaschineBefore leveler
    88th
    Spritzkühlungspray cooling
    8a8a
    SpritzkühleinheitenSpray cooling units
    99
    Kühleinheitcooling unit
    1010
    RollgangsgeschwindigkeitRoller speed
    1111
    Drehmomenttorque
    1212
    RückmeldungsregelungFeedback control
    1313
    Teilungdivision
    1414
    halbe Längehalf length
    1515
    resultierende Wellenlängeresulting wavelength
    1616
    Wellenverlaufwaveform
    1717
    gepunktete Liniedotted line
    1818
    Auslaufoutlet
    1919
    Kühlelementcooling element
    2020
    Band- oder BlechmitteStrip or sheet center
    2121
    Oberflächentemperatursurface temperature
    2222
    U-Röhrchen-EinheitenU-tube units
    2323
    Richtrollestraightening roller
    2424
    Richtrollestraightening roller
    2525
    Laminar-KühlvorrichtungLaminar cooling device

Claims (12)

  1. Method for controlled straightening and cooling of a wide metal strip (1), particularly a steel strip, or plate (1) running out of a hot-strip rolling mill, wherein the metal strip or plate is guided within a spray cooling (8) initially by a double roller, which comprises two individual rollers (3, 4) arranged vertically one above the other, and subsequently by at least one first pinching roller pair (5a) arranged behind the double roller (3, 4) in strip running direction (2); the metal strip runs through a first cooling unit (9) between the double roller (3, 4) and the first pinching roller pair (5a); and a tensile stress acting in longitudinal direction is produced in the metal strip between the double roller (3, 4) and the first pinching roller pair (5a); characterised in that the metal strip (1) or the plate prior to its entry into the double roller (3, 4) runs through a pre-straightening machine (7) with straightening rollers and associated rotary drive motors; and between the pre-straightening machine (7) and the double roller (3, 4) does not run through a cooling unit (9), but is placed under defined tensile stresses by regulation of the rotary drive motors for the straightening rollers of the pre-straightening machine (7).
  2. Method according to claim 1, characterised in that the tensile stress in the metal strip or plate is additionally regulated within the spray cooling (8) between two respective pinch roller pairs (5a) following one another in strip running direction (2).
  3. Method according to claim 2, characterised in that the metal strip or plate is additionally cooled between the successive pinching roller pairs (5a).
  4. Method according to one of the preceding claims, characterised in that the tensile stress is regulated by switching over the speed with respect to each next, last supporting pinching roller with progressing transit of the metal strip or of the plate.
  5. Method according to one of the preceding claims, characterised in that the pinching rollers are fixed at a pitch, wherein a cooling unit is formed between two pinching rollers depending on the pitch.
  6. Method according to claim 5, characterised in that this pitch is adjusted to a half length of the resulting intrinsic shape for a metal strip or a plate with smallest thickness at maximum width and high cooling intensity.
  7. Equipment for controlled straightening and cooling of a wide metal strip or plate (1), particularly steel strip, or plate (1), running out of a hot-strip rolling mill, comprising: a spray cooling (8) with a double roller having two individual rollers (3, 4) arranged vertically one above the other, at least one first pinching roller pair (5a) arranged behind the double rollers in strip running direction (2) and a first cooling unit (9) arranged behind the double roller (3, 4) and the first pinching roller pair (5a); wherein a tensile stress acting in longitudinal direction in the metal strip or plate guided through the spray cooling (8) can be produced between the double roller (3, 4) and the first pinching roller pair (5a), characterised in that a pre-straightening machine (7), which is upstream of the spray cooling (8) and transited by the metal strip, with straightening rollers and associated rotary drive motors is provided for placing the metal strip, between the pre-straightening machine (7) and the double roller (3, 4) and without cooling, under defined tensile stresses by regulation of the rotary drive motors for the straightening rollers of the pre-straightening machine (7).
  8. Equipment according to claim 7, characterised by a feedback control for controlling the tensile stress between two pinching roller pairs (5a) by control of torques.
  9. Equipment according to claim 8, characterised in that a respective cooling unit (9) is provided between two pinching roller pairs (5a).
  10. Equipment according to one of claims 7 to 9, characterised in that the cooling unit (9) with finely adjustable cooling elements (19) is provided in the outlet (18) of the metal strip (1).
  11. Equipment according to one of claims 7 to 10, characterised in that the cooling unit (9) is designed for a high and/or medium cooling output in the sense of a predetermined product spectrum.
  12. Equipment according to one of claims 7 to 11, characterised in that tensile stresses (6) can similarly be produced between the last, supporting pinch rollers (5) or the straightening rollers (23) at the end (1a) of the metal strip (1) or of the plate and the pinch rollers (5) or the straightening rollers (24) at the start of the metal strip (1).
EP20020785402 2001-12-20 2002-11-21 Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill Active EP1456421B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10163070 2001-12-20
DE2001163070 DE10163070A1 (en) 2001-12-20 2001-12-20 Method and device for the controlled straightening and cooling of wide metal strip, in particular steel strip or sheet metal, emerging from a hot strip rolling mill
PCT/EP2002/013035 WO2003054236A1 (en) 2001-12-20 2002-11-21 Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill

Publications (2)

Publication Number Publication Date
EP1456421A1 EP1456421A1 (en) 2004-09-15
EP1456421B1 true EP1456421B1 (en) 2006-05-31

Family

ID=7710240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020785402 Active EP1456421B1 (en) 2001-12-20 2002-11-21 Method and device for controlled straightening and cooling of a wide metal strip, especially a steel strip or sheet metal, running out of a hot rolled strip rolling mill

Country Status (13)

Country Link
US (2) US20050016643A1 (en)
EP (1) EP1456421B1 (en)
JP (1) JP4440643B2 (en)
CN (1) CN100402672C (en)
AT (1) AT328123T (en)
AU (1) AU2002350708A1 (en)
BR (1) BR0214598A (en)
CA (1) CA2469073C (en)
DE (2) DE10163070A1 (en)
ES (1) ES2261757T3 (en)
RU (1) RU2307718C2 (en)
UA (1) UA77241C2 (en)
WO (1) WO2003054236A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2486991B1 (en) 2009-10-07 2017-01-25 Nippon Steel & Sumitomo Metal Corporation Cooling method for hot rolling

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4315951B2 (en) * 2005-12-26 2009-08-19 株式会社神戸製鋼所 Steel plate for welding
JP2011042814A (en) * 2009-08-19 2011-03-03 Chugai Ro Co Ltd Apparatus and method for cooling metallic strip
US9822422B2 (en) 2009-09-24 2017-11-21 Ati Properties Llc Processes for reducing flatness deviations in alloy articles
EP2353742A1 (en) * 2010-02-05 2011-08-10 Siemens Aktiengesellschaft Heat rolling train for rolling hot rolled strips, method for operating same to roll hot rolled strips, control and/or regulating device
EP2361699A1 (en) * 2010-02-26 2011-08-31 Siemens Aktiengesellschaft Method for cooling sheet metal with a cooling section, cooling section and control and/or regulating device for a cooling section
CN101993995B (en) * 2010-11-26 2012-05-30 首钢总公司 Water quenching and cooling method and device for ultrahigh-strength strip steel
RU2463122C2 (en) * 2010-12-16 2012-10-10 Валерий Никитич Гринавцев Method of strip straightening
RU2456109C1 (en) * 2010-12-16 2012-07-20 Валерий Никитич Гринавцев Strip straightening machine
RU2474623C1 (en) * 2011-10-31 2013-02-10 Валентин Николаевич Никитин Method of producing high-strength martensitic sheet steel and thermal strain complex to this end
KR101376565B1 (en) * 2011-12-15 2014-04-02 (주)포스코 Method and apparatus for controlling the temperature of strip in the rapid cooling section of continuous annealing line
DE102012110010B4 (en) * 2012-10-19 2016-09-01 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Apparatus and method for the continuous treatment of a metal strip
CN105483343B (en) * 2014-09-17 2017-06-23 宝山钢铁股份有限公司 Medium and Heavy Plate Rolling Production linear velocity control method for improving steel plate flatness
CN104451117A (en) * 2014-09-23 2015-03-25 中冶赛迪工程技术股份有限公司 Quenching plate shape control method and device
DE102017118244A1 (en) * 2017-08-10 2019-02-14 Thyssenkrupp Ag Apparatus and method for producing a hot strip

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604696A (en) * 1968-12-10 1971-09-14 Dorn Co The Van Continuous quench apparatus
FR2217425B1 (en) * 1972-11-15 1975-06-13 Creusot Loire
JPS6111298B2 (en) * 1980-11-27 1986-04-02 Kawasaki Steel Co
US4813652A (en) * 1981-11-26 1989-03-21 Union Siderurgique Du Nord Et De L'est De La France (Usinor) Plant for effecting the controlled cooling of metal sheets
DE3313024A1 (en) * 1983-04-12 1984-10-18 Babcock Bsh Ag Method and device for quenching passing steel sheets, in particular thick or medium sheets, with simultaneously controlled alignment
US4826138A (en) * 1984-02-24 1989-05-02 Van Dorn Company Apparatus for heat treating steel plates
EP0159774B1 (en) * 1984-02-24 1987-12-09 Van Dorn Company Method and apparatus for heat treating steel plates
JPS611420A (en) * 1984-06-12 1986-01-07 Kobe Steel Ltd Forced cooling method of hot-rolled thick steel plate and its device
CN1042348C (en) * 1992-12-09 1999-03-03 王德明 Method for mfg. of water-hardened steel conveyer belt by using non-hardened and tempered belt steel
DE4437872C1 (en) * 1994-10-22 1996-03-14 Bwg Bergwerk Walzwerk Method for producing metal sheets, in particular large-sized metal sheets, and device
DE60139179D1 (en) * 2000-03-01 2009-08-20 Jfe Steel Corp DEVICE AND METHOD FOR COOLING HOT-ROLLED STEEL STRIP AND METHOD FOR PRODUCING THEREOF

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2486991B1 (en) 2009-10-07 2017-01-25 Nippon Steel & Sumitomo Metal Corporation Cooling method for hot rolling

Also Published As

Publication number Publication date
US20120024435A1 (en) 2012-02-02
JP4440643B2 (en) 2010-03-24
CN1606630A (en) 2005-04-13
CN100402672C (en) 2008-07-16
BR0214598A (en) 2004-11-03
WO2003054236A1 (en) 2003-07-03
RU2307718C2 (en) 2007-10-10
US20050016643A1 (en) 2005-01-27
DE50207037D1 (en) 2006-07-06
RU2004122098A (en) 2005-03-27
CA2469073C (en) 2011-10-11
AU2002350708A1 (en) 2003-07-09
AT328123T (en) 2006-06-15
UA77241C2 (en) 2006-11-15
JP2005512816A (en) 2005-05-12
EP1456421A1 (en) 2004-09-15
CA2469073A1 (en) 2003-07-03
DE10163070A1 (en) 2003-07-03
ES2261757T3 (en) 2006-11-16

Similar Documents

Publication Publication Date Title
EP1799368B1 (en) Method and device for continuously producing a thin metal strip
EP0326190B1 (en) Apparatus for manufacturing a steel strip having a thickness between 2 and 25 mm
EP0889762B1 (en) Method for producing hot-rolled steel strip
EP1519798B1 (en) Method and casting roller plant for the semi-endless or endless rolling by casting of a metal in particular a steel strip which may be transversely separated as required after solidification
EP0732160B1 (en) Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor
EP2155411B1 (en) Device for influencing the temperature distribution over a width
EP0804300B1 (en) Process and device for producing a steel strip with the properties of a cold-rolled product
EP0545104B1 (en) Method and apparatus for continuous casting of ingots or blooms
EP0611610B1 (en) Process for the production of a strip, a pre-strip or a slab
EP2119514B1 (en) Method for straightening a metal strip
EP0618020B1 (en) Method for rolling of a strip
EP1781429B1 (en) Method for straightening a metal strip and straightening machine
DE3637893C2 (en) Process and plant for the production of hot-rolled steel strip and strip casting plant
DE4129988C2 (en) Method for controlling the lateral position of a strip that runs out of a hot rolling mill and is to be rolled up
DE3036997C2 (en)
EP1365869B1 (en) Roll stand for producing plane roll strips having a desired strip profile superelevation
DE3419261C3 (en) Roll cooling and / or lubricating device for cold strip rolling mills, especially fine strip rolling mills
EP1406735B1 (en) Cold rolling mill and method for cold roll forming a metallic strip
DE4402402B4 (en) Process for producing hot-rolled steel strip from continuously cast starting material and plant for carrying out the process
DE69411971T3 (en) Hot rolling mill for steel sheet and rolling process
EP1896200B1 (en) Process and device for intentionally influencing the geometry of roughed-down strips in a roughing-down stand
EP0908248A2 (en) Device and method for influencing the frictional relationships between an upper and a lower roll of a rolling stand
EP1732716B1 (en) Method for producing a metal
EP0761326B1 (en) Installation for producing hot rolled thin strip
EP0061441A2 (en) Apparatus for the hot rolling of striplike or tabular rolling stock

Legal Events

Date Code Title Description
AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

17P Request for examination filed

Effective date: 20040428

17Q First examination report despatched

Effective date: 20041206

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060531

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060531

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060531

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 50207037

Country of ref document: DE

Date of ref document: 20060706

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060831

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20061031

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2261757

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

ET Fr: translation filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

26N No opposition filed

Effective date: 20070301

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060831

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061121

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060531

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: NL

Payment date: 20131121

Year of fee payment: 12

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20150601

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 50207037

Country of ref document: DE

Representative=s name: HEMMERICH & KOLLEGEN, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 50207037

Country of ref document: DE

Owner name: SMS GROUP GMBH, DE

Free format text: FORMER OWNER: SMS SIEMAG AKTIENGESELLSCHAFT, 40237 DUESSELDORF, DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150601

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: CZ

Payment date: 20161118

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171121

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: BE

Payment date: 20191120

Year of fee payment: 18

Ref country code: ES

Payment date: 20191220

Year of fee payment: 18

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: AT

Payment date: 20191121

Year of fee payment: 18

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: DE

Payment date: 20201119

Year of fee payment: 19

Ref country code: FI

Payment date: 20201119

Year of fee payment: 19

Ref country code: SE

Payment date: 20201125

Year of fee payment: 19

Ref country code: GB

Payment date: 20201120

Year of fee payment: 19

Ref country code: FR

Payment date: 20201120

Year of fee payment: 19

Ref country code: IT

Payment date: 20201124

Year of fee payment: 19