EP4249141A1 - Procédé de fonctionnement d'un train de laminage - Google Patents

Procédé de fonctionnement d'un train de laminage Download PDF

Info

Publication number
EP4249141A1
EP4249141A1 EP23161456.1A EP23161456A EP4249141A1 EP 4249141 A1 EP4249141 A1 EP 4249141A1 EP 23161456 A EP23161456 A EP 23161456A EP 4249141 A1 EP4249141 A1 EP 4249141A1
Authority
EP
European Patent Office
Prior art keywords
speed
strip
rolling
metal strip
operating method
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.)
Pending
Application number
EP23161456.1A
Other languages
German (de)
English (en)
Inventor
Philipp Raming
Jörn Sieghart
Marc Schneider
Kai GRYBEL
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 Group GmbH
Original Assignee
SMS Group GmbH
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
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP4249141A1 publication Critical patent/EP4249141A1/fr
Pending legal-status Critical Current

Links

Images

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
    • B21B37/46—Roll speed or drive motor control
    • 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
    • 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
    • B21B1/28—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 cold-rolling, e.g. Steckel cold 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
    • B21B1/46—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 metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/06—Threading
    • B21B2273/08—Threading-in or before threading-in
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/06—Threading
    • B21B2273/10—Threading-out or after threading-out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product
    • B21B2273/14—Front end or leading end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product
    • B21B2273/16—Tail or rear end
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/06—Product speed

Definitions

  • the invention relates to an operating method for a rolling train which has a plurality of rolling stands through which a metal strip passes, the metal strip being successively threaded into at least some of the rolling stands and the metal strip passing through the rolling train with a gradual reduction in thickness from an initial thickness to a target thickness.
  • the invention relates in particular to the automation of a rolling train, the operating method for operating cold rolling trains for steel in discontinuous and continuous operation, for operating combined pickling and cold rolling train systems in discontinuous and continuous operation, for operating continuous and discontinuous steel hot rolling trains, for control of casting rolling mills, billet rolling mills, aluminum hot rolling mills, aluminum cold rolling mills and for controlling reversing rolling mills with two or more rolling stands.
  • Rolling mills are usually operated automatically using multi-stage control systems. These control systems usually include controllers to which setpoints are specified by a higher-level device. The setpoints can be currently valid setpoints or setpoint curves. As a rule, Level 2 systems calculate the setpoints using online optimization algorithms, which in turn rely on online models of the system to be controlled.
  • the online models are data-based or mathematical-physical models.
  • the present invention relates in particular to Level 1 and Level 2 automation of a plant for rolling metal strips.
  • the system can be designed as a hot rolling system or cold rolling system or even as a profile rolling system.
  • a level 2 automation level in the sense of the present invention is understood to mean a process control level, which can include, for example, a higher-level process control technology, and which can be provided immediately above a control level (level 1 automation) for direct control and regulation of the units of a rolling train .
  • metal preliminary products or semi-finished products are usually rolled out into a finished strip and assembled into a coil.
  • slabs with initial thicknesses of 200-150 mm are heated to temperatures of around 1250° in a furnace system. These are then rolled out in a roughing mill using roughing stands to give pre-strips with thicknesses of 25-45 mm and pre-strip temperatures in the range of 950-1050 °C.
  • the pre-strips are then threaded into a finishing train with finishing stands arranged one behind the other and finished rolled into finished strips with thicknesses of 1.25-25 mm and final rolling temperatures of 850-950°.
  • the state of the art is the threading in and/or out or through of the preliminary product/semi-finished product at a constant speed based on the exit speed of the rolling mill. It is common practice to operate the individual rolling stands at a constant speed. In hot rolling systems, this is particularly useful with regard to the temperature profile of the metal strip, which should have a predetermined target temperature based on the furnace temperature after threading into the strip head.
  • the speed of the strip foot or strip head depends on the ratio of the thickness reduction of an initial thickness in front of the respective roll stand to a thickness after the respective roll stand.
  • the increase in speed of the strip head is proportional to the decrease in thickness of the metal strip within the rolling stand.
  • the invention is based on the object of providing an operating method for a rolling train which enables the productivity of the rolling train to be increased without changing the mechanical configuration.
  • the operating procedure is intended in particular to enable an increase in production through appropriate interventions in the process control.
  • an operating method for a rolling train which has a plurality of rolling stands through which a metal strip is to pass, the metal strip being successively threaded into at least some of the rolling stands and the metal strip passing through the rolling train with a gradual reduction in thickness from an initial thickness to a target thickness
  • the method involves speed control of the individual Rolling stands by means of a higher-level process control and wherein at least the entry speed of the metal strip into the rolling train and / or the speed of the rolling stands when threading a strip head and / or a strip foot or a planned section change of the metal strip into the rolling stands corresponds to a speed specification for the metal strip or for parts of the metal strip is regulated.
  • the speed of the rolling stands in particular during the threading process, is regulated in such a way that the mass flow of the metal strip is variable across all rolling stands when threading it in and/or through it.
  • a section change i.e. a planned change in geometry of the metal strip, can result, for example, from a product change during continuous rolling.
  • the rolling stands are operated at a constant speed when threading the metal strip in and/or through it, which has the result that the mass flow of the metal strip is constant, due to the fact that the strip head is proportional to the Thickness reduction in the roll stand in question is accelerated.
  • the speed of all roll stands depends on a then constant target speed of the strip head behind the last roll stand.
  • the operating method according to the invention is characterized in particular by the fact that the speed of the individual rolling stands is not constant, but that the speed of the individual rolling stands is regulated in accordance with a speed specification calculated in a higher-level process control, preferably in level 2 automation. This results in a “speed cascade” or a speed profile for the metal strip over the inlet and/or the threading process.
  • This procedure has the advantage that the threading speed of the metal strip into the rolling stands can be significantly increased, resulting in considerable time savings and thus an increase in productivity.
  • the speed control in such a way that the speed of the band head, the band foot or a band transition in the respective intermediate stand area is no longer calculated in proportion to the total thickness reduction, but is basically as fast as possible without exceeding a calculated exit speed, has the advantage that during the threading process a time saving of up to 30% can be achieved.
  • the calculation of the speed specification for the entry and/or threading of the metal strip is preferably carried out taking into account the technical limits and the boundary conditions of the rolling train units as well as taking into account given process variables for the rolling process.
  • Technical limits and boundary conditions of the rolling train units are, for example, the maximum power of the rolling stand drives or their maximum possible piercing impact.
  • Predetermined process variables include the temperature of the metal strip, the temperature profile of the metal strip over its length and/or over its width, the maximum possible and/or permissible strip tension, the flatness of the metal strip, the forming energy that can be applied, the strip geometry, in particular the strip preparation, the enthalpy conservation, the specific enthalpy, the surface quality of the finished metal strip, the microstructure and the yield point of the metal strip.
  • the speed control can include a data-based and/or rule-based speed specification, for example material- and/or dimension-related.
  • a data-based specification in the sense of the present invention means that the optimal speed for the strip head over the entire path when threading and / or threading through the rolling train is determined through an automated analysis of a large amount of data and the individual rolling stands are controlled accordingly via Level 1 automation become.
  • a rule-based specification of the optimal speed for example material- and/or dimension-related, can also be provided.
  • a distance monitoring of the strip head to a strip foot of a metal strip passing through the rolling train downstream is expediently provided, with the speed control taking into account a minimum distance to the strip foot of the metal strip passing through the rolling train downstream as a boundary condition. This is advantageous and makes sense to ensure that the rolled strip does not run into the leading strip foot.
  • the operating method of the invention is used for the process control of a hot strip mill, in which a hot strip is threaded as a pre-strip from a roughing mill into a finishing mill, this has the advantage that Due to the increased threading speed at the belt head, lower heat losses occur and a more homogeneous temperature profile can be achieved over the belt length.
  • the method includes controlling the temperature of the tape head.
  • a temperature control can take place, for example, depending on a target temperature of the tape head.
  • the temperature curve or the temperature profile of the metal strip is particularly dependent on the thickness of the metal strip.
  • a reference temperature at the strip head can only be achieved through the driving style according to the invention or through the control according to the invention.
  • the temperature of the pre-strip can be regulated, for example, by multiple use of a descaling device and/or via a temperature control and/or regulation of an oven upstream of the pre-line and/or via a thickness profile given to the metal bath in the pre-line.
  • the coolant volume flow of at least one intermediate stand cooling system is controlled and/or regulated as a function of the speed of at least one roll stand.
  • the winding speed of at least one reel for winding the finished rolled metal strip is controlled and / or regulated depending on a speed cascade of the metal strip via several rolling stands.
  • Figure 1 shows a schematic representation of a casting-rolling plant with a continuous casting plant 1, which is followed by a roughing train 2 and a finishing train 3.
  • the roughing line 2 includes a first furnace 4, two roughing stands 5, a second furnace 6 and a pair of shears 7.
  • the finishing train 3 includes a scale washer 8 and a plurality of rolling stands F1 to Fn, which are arranged one behind the other in a rolling line.
  • the method according to the invention is based on the in Figure 1
  • the casting and rolling system is shown schematically and in a simplified manner.
  • the operating method according to the invention is not limited to such a system, but rather refers to it Speed control of the rolling stands F1 to Fn, which in the exemplary embodiment described are arranged as finishing stands in a finishing train 3.
  • a casting strand produced with the continuous casting system 1 is pre-rolled by means of the roughing stands 5, for example, into a metal strip in the form of a thin slab, which, after descaling in the scale washer 8, is threaded into the rolling stands F1 to Fn of the finishing train 3.
  • the rolling stands F1 to Fn arranged in the finishing train 3 are each controlled via a higher-level process control (not shown), the process control comprising a Level 2 automation level and a Level 1 automation level arranged below it for direct control and regulation of the rolling stands F1 to Fn.
  • the operating method according to the invention includes speed regulation and speed control of the rolling stands F1 to Fn such that the entry speed of the metal strip, in the present case the thin slabs, into the rolling stands F1 to Fn during threading is regulated so that the speed of the strip head for each rolling stand F1 to Fn has a maximum possible threading speed in front of a first roll stand F1 and between two roll stands F1 to Fn, taking into account the respective technical limits and boundary conditions of the roll stands F1 to Fn and taking into account the fact that a calculated and / or predetermined maximum Rolling speed is not exceeded after completion of the threading process.
  • FIG. 2 A schematic representation of the regulation and control concept according to the operating method according to the invention is in Figure 2 shown.
  • the hot strip/pre-strip or the slab is first threaded into the first roll stand F1 at the maximum possible speed.
  • the first roll stand F1 is operated at maximum speed.
  • the limit of the entry speed of the metal strip into the first roll stand F1 is determined by the maximum speed of the descaling process within the scale washer 8, the maximum speed of the roller table and the safety distance to the metal strip in front.
  • the maximum speed of the first roll stand F1 results from its motor power and the maximum piercing impact. This results in an initial speed V0 in front of the first roll stand F1.
  • the rotational speed of the rolling stand or its speed may be higher than V0. Only with the tapping is the rolling stand F1 braked and the strip head brought to the appropriate speed. This has the advantage that the strip tension between the rolling stands F1 and F2 is built up relatively quickly and safely.
  • the speed of the rolling stands F1 and F2 is increased as much as possible. If an increase is not possible, the resulting speed of the strip head in the stand area between the roll stand F1 and the roll stand F2 is equal to the speed that results from the decrease in thickness of the metal strip.
  • the mass flow or volume flow through all rolling stands depends on the speed of the strip head, which according to the invention can be specified according to an overarching control goal and is variable.
  • the speed of the tape head V tape head and/or the speed of the tape foot V tape foot and/or the speed of a section change V product change can be freely specified in order to achieve an overarching control goal, in the simplest case maximization.
  • the technical boundary conditions or limits and the specified process conditions of the rolling process must be adhered to.
  • the function Min (A; B) is a function that outputs the smaller value of the two values A, B.
  • the speed of the strip head determined as described above is compared with a given calculated final speed of the metal strip behind the last rolling stand Fn. Both values become the minimum selected so that the metal strip does not exceed the final speed intended after the threading process.
  • the operating method according to the invention includes, as already stated at the beginning, a control of the temperature of the metal strip, in particular of the strip head.
  • the Figure 3 shows two diagrams in which the temperature of the metal strip, the mass flow or volume flow of the material, and the reel speed of the reel are plotted over the length of the rolling train, the left illustration showing the relevant variables for a thickness of the metal strip of less than 2 mm and The illustration on the right shows the relevant sizes for a metal strip thickness of more than 2 mm.
  • the diagrams illustrate the temperature and velocity profiles for the operating method according to the invention.
  • the line that characterizes the mass flow initially illustrates the so-called speed cascade, which, for example, the strip head of the metal strip carries out when it passes through the rolling stands F1 to F6.
  • the speed profile decreases slightly in steps from roll stand F1 to roll stand Fn until a constant final speed and then increases in steps again as the metal strip is wound up by the reel.
  • the actual temperature curve of the metal strip and the reference temperature of the metal strip are shown above.
  • the reference temperature refers to the temperature that is aimed for in order to achieve certain structural properties of the finished product.
  • the water consumption of an intermediate stand cooling system is shown over the length of the rolling train. In the case of the illustration on the left, the rolling stock reaches the reference temperature at a temperature measuring point behind the rolling stand F6. However, this drops again due to a relatively high cooling rate of the rolling stock immediately behind the roughing train. Interstand cooling is achieved with a minimal amount of water.
  • the rise of Water consumption towards the end of the rolling process is due to a cooling section provided there.
  • the strip head remains at the intended reference temperature behind the last rolling stand F6 or behind a temperature measuring point. This results in particular from the increased threading speed into the roll stands F1 to Fn. Since the cooling of the strip head does not drop so quickly due to a high threading speed and a higher heat capacity, a larger amount of water is initially required for the intermediate stand cooling, but this then becomes increasingly smaller.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
EP23161456.1A 2022-03-25 2023-03-13 Procédé de fonctionnement d'un train de laminage Pending EP4249141A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022202987.9A DE102022202987A1 (de) 2022-03-25 2022-03-25 Betriebsverfahren für eine Walzstraße

Publications (1)

Publication Number Publication Date
EP4249141A1 true EP4249141A1 (fr) 2023-09-27

Family

ID=85601747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23161456.1A Pending EP4249141A1 (fr) 2022-03-25 2023-03-13 Procédé de fonctionnement d'un train de laminage

Country Status (2)

Country Link
EP (1) EP4249141A1 (fr)
DE (1) DE102022202987A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460852A (en) * 1981-02-06 1984-07-17 Sumitomo Kinzoku Kogyo Kabushiki Gaisha Method of controlling mill motors speeds in a cold tandem mill
DE19726586A1 (de) * 1997-06-23 1999-01-07 Siemens Ag Verfahren und Einrichtung zur Verringerung bzw. Kompensation von Drehzahleinbrüchen beim Einfädeln eines Walzgutes in ein Walzgerüst
EP3437748A1 (fr) * 2017-08-01 2019-02-06 SMS Group GmbH Réglage de débit massique dans les installations de laminage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460852A (en) * 1981-02-06 1984-07-17 Sumitomo Kinzoku Kogyo Kabushiki Gaisha Method of controlling mill motors speeds in a cold tandem mill
DE19726586A1 (de) * 1997-06-23 1999-01-07 Siemens Ag Verfahren und Einrichtung zur Verringerung bzw. Kompensation von Drehzahleinbrüchen beim Einfädeln eines Walzgutes in ein Walzgerüst
EP3437748A1 (fr) * 2017-08-01 2019-02-06 SMS Group GmbH Réglage de débit massique dans les installations de laminage

Also Published As

Publication number Publication date
DE102022202987A1 (de) 2023-09-28

Similar Documents

Publication Publication Date Title
EP0889762B1 (fr) Procede pour fabriquer un feuillard d'acier lamine a chaud
AT504782B1 (de) Verfahren zur herstellung eines warmgewalzten stahlbandes und kombinierte giess- und walzanlage zur durchführung des verfahrens
EP0266564B1 (fr) Installation de coulée en bande avec un laminoir continu à plusieurs cages placé en aval
EP1519798B1 (fr) Procede et installation de laminage de coulee continue pour le laminage semi-continu ou continu par coulee d'une barre de metal, en particulier d'acier, separee transversalement selon le besoin apres solidification
EP2603337B1 (fr) Procédé de production de laminés à l'aide d'une installation combinée de laminage direct, dispositif de commande et/ou de régulation pour une installation combinée de laminage direct, et installation combinée de laminage direct
WO2002024355A1 (fr) Procede et installation pour produire des feuillards et des toles en acier
EP2964404B1 (fr) Procédé de production d'une bande métallique au moyen de cylindres de coulée
EP3504013B1 (fr) Procédé de fabrication d'une bande métallique dans une installation de laminage direct
EP2428288B1 (fr) Procédé de fabrication de bandes en acier par laminage continu ou semi-laminage continu
EP0761326A1 (fr) Installation pour la production d'une bande mince laminée à chaud
DE3837642A1 (de) Verfahren und vorrichtung zur herstellung von warmgewalzten stahlbaendern
EP3341142B1 (fr) Procédé de fonctionnement d'une installation fonctionnant suivant le concept csp (compact strip production)
EP3000539B1 (fr) Procédé destinés à couler et laminer un produit en coulée continue
WO2016165933A1 (fr) Installation de coulée et de laminage et procédé servant à faire fonctionner ladite installation
EP2209573B1 (fr) Procédé de laminage austénitique continu d'une bande fabriquée lors d'un processus de coulée continu
EP4249141A1 (fr) Procédé de fonctionnement d'un train de laminage
DE102019207459A1 (de) Gieß-Walzanlage für den Batch- und Endlosbetrieb
DE10137944A1 (de) Warmwalzanlage
EP2718035A1 (fr) Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique
EP0845310B1 (fr) Refroidissement de fil
AT511657A1 (de) Inbetriebnahme einer fertigwalzstrasse in einer giess-walz-verbundanlage
EP3138639B1 (fr) Procede de production d'une bande metallique par laminage en continu
DE102009060828A1 (de) Walzanlage zum kontinuierlichen Walzen von bandförmigem Walzgut
EP4072747B1 (fr) Cage de laminoir à chaud pour laminoir à chaud et pour fabriquer un produit métallique plat, laminoir à chaud et procédé de fonctionnement d'un laminoir à chaud
DE10025080A1 (de) Verfahren zum Herstellen von Metallband

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17P Request for examination filed

Effective date: 20230313

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20230904

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20231124

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR