EP2982453A1 - Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique - Google Patents

Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique Download PDF

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Publication number
EP2982453A1
EP2982453A1 EP14179980.9A EP14179980A EP2982453A1 EP 2982453 A1 EP2982453 A1 EP 2982453A1 EP 14179980 A EP14179980 A EP 14179980A EP 2982453 A1 EP2982453 A1 EP 2982453A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
strip
cooling
scissors
foot
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.)
Withdrawn
Application number
EP14179980.9A
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German (de)
English (en)
Inventor
Manfred Kuegel
Axel RIMNAC
Alois Seilinger
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria 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
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Application filed by Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Priority to EP14179980.9A priority Critical patent/EP2982453A1/fr
Priority to US15/328,324 priority patent/US10870139B2/en
Priority to PCT/EP2015/065731 priority patent/WO2016020134A1/fr
Priority to EP15738039.5A priority patent/EP3177412B1/fr
Priority to RU2017106342A priority patent/RU2679321C2/ru
Priority to CN201580042202.5A priority patent/CN106536074B/zh
Priority to MX2017001670A priority patent/MX2017001670A/es
Publication of EP2982453A1 publication Critical patent/EP2982453A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • 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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • 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
    • 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
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/20—Temperature
    • B21B2261/21—Temperature profile

Definitions

  • the present invention relates to the field of metallurgical plants, specifically a rolling mill with a cooling zone for cooling and a pair of scissors for cutting metal strips, preferably steel.
  • the invention relates to a device for cutting a metal strip for carrying out the method according to the invention, with a roller table for guiding the metal strip, with at least one cooling device, wherein the cooling device is arranged in front of a pair of scissors, and the scissors for cutting the metal strip in a tape head and a strip foot.
  • scissors which may for example be designed as pendulum scissors, before the finishing train as a separator, designated.
  • the sufficient gap is necessary so that no collisions between the tape head and the belt foot can occur in the following system parts - eg in front of the reel. Furthermore, it must be ensured that there are not two different metal bands on the same section of the outfeed roller table at the same time.
  • the gap may also be necessary if a roll gap change - due to a change in thickness of the subsequent metal strip - is provided.
  • the increase in speed also means that the following parts of the system, such as the induction furnace, finishing train and the cooling zone are passed through faster. When passing through the finishing train it also comes due to the higher speed to temperature increases which has a negative effect on the mechanical belt properties and on the surface quality.
  • the process parameters of the plant parts must be adapted accordingly in order to avoid unfavorable temperature increases.
  • the cooling pattern of the cooling zone must also be adjusted accordingly. Particularly disadvantageous the separation on the scissors before the finishing train in an ESP (Endless Strip Production) plant, as the advantages of the stable endless operation are thereby repealed.
  • the object of this invention is to provide a method and an apparatus of the type mentioned, with which metal strips with thicknesses greater than 4 mm and / or metal strips of high-strength grades (yield stresses above 500MPa) by a pair of scissors, after a finishing train and after a cooling section is arranged, can be divided transversely.
  • This object is achieved in the aforementioned method in that the metal strip is cooled in the cooling zone to a predetermined temperature profile in the longitudinal direction of the metal strip, so that the metal strip in the region of the later tape head and band foot has a higher temperature than in the upstream and downstream areas ,
  • the metal strip is guided in the transport direction through a cooling zone.
  • the metal strip is cooled and then there is a cross-cutting of the metal strip on the scissors, so that the transversely divided metal strip has a tape head and a band foot.
  • the tape head is the beginning of a metal strip in the transport direction.
  • the band foot is the end of the metal band after the cross cutting.
  • Band head of the trailing metal strip and band foot of the leading metal strip are therefore identical to the transverse parts and only as an imaginary plane transverse to the transport direction available.
  • a temperature profile is set by the cooling zone, which has a higher temperature than in the upstream and downstream areas.
  • the yield stress is preferably reduced by up to 50%.
  • the reduction of the Yield stress may even be> 50%.
  • the expended for the cutting of the band cutting forces are reduced accordingly.
  • the cross-cutting of the metal strip can be done easily with a common scissors used.
  • the scissors interpreted larger - which is also possible due to the inertia anyway only in a limited context and is also associated with high costs.
  • the area of the later tape head and tape foot is constantly tracked (i.e., in real time) at least from the beginning of the cooling zone to the shears.
  • the later tape head and band foot are already defined before the metal strip enters the cooling zone.
  • the temperature profile that is set on the metal strip is advantageously a ramp profile.
  • an optimized temperature profile can be set for each steel grade and / or thickness in order to minimize the cutting forces on the shears.
  • the temperature in the region of the later band head and band foot is at least 100 ° C. higher than that of the remaining metal band. From this temperature difference, a significant reduction in the forces to be expended when cutting cross.
  • the band foot and the tape head are uncooled. As a result, the forces to be expended when cutting are reduced the most.
  • the metal strips for which this method is particularly suitable are those of high and very high strength grades, especially tubular steels such as X70 or X80, hot strip multiphase steels such as e.g. Dual phase steel DP600, DP800, DP1000 and others or fully martensitic steels.
  • the temperature profile is adjusted in the cooling zone in the region of the later tape head and the belt foot by the cooling medium in this area is not applied or only to a reduced extent.
  • the supply of the cooling medium is adjusted according to the desired temperature profile.
  • the adjustment of the amount of cooling medium is discrete. With a discrete set amount either 100% of the cooling medium is applied or 0%. This has the advantage that the cooling zone can be easily carried out without complex actuators - e.g. for adjusting the amount - to need. An execution in a continuous manner is also conceivable. The adjustment then takes place via the quantity or the pressure.
  • This method is particularly advantageous if the metal strip is rolled before cooling in the cooling zone in a rolling train of a G mannalzverbundstrom.
  • This method can also be used in existing systems without major alterations. Particularly preferred, this method can be used for ESP (Endless Strip Production) systems. This has the clear advantages that with the same system configuration, the endless operation can be extended to high-strength grades and larger thicknesses, without having to accept adverse effects on the strip properties.
  • a further advantageous embodiment of the method is that the metal strip is wound on a reel after the cross-cutting. Due to the higher temperature of the tape head threading the reel is facilitated - as well as the subsequent Anwickeln. At the same time damage such as impressions on the driver rollers are avoided. As a reel, the device is called, which winds the metal strip.
  • a further advantageous embodiment is that the length of a metal strip section with elevated temperature ⁇ a circumference of a coil, so that the coil is wrapped by the band foot warm.
  • the increased temperature of the band foot has in addition the positive effect that it comes to a more uniform cooling of the metal strip. Since the outermost layer cools faster than the underlying layer, the cooling process is more uniform over the entire length of the wound metal strip, resulting in more homogeneous mechanical properties.
  • the length of the warm belt foot should advantageously have at least the circumference of the coil. As a coil on the reel wound into a roll metal strip is called.
  • a knife gap of the scissors is adjusted depending on the thickness of the metal strip.
  • the tracking device has a computing device and at least one position or speed sensor has, which controls the cooling device before the cross-section of the metal strip such that adjusts the desired temperature profile in the region of the later tape head and band foot.
  • the position or speed sensor can be a contacting (eg pressing a roller or the speed at the reel) or a non-contact (optically eg via a laser) design.
  • the cooling device it is expedient to carry out the cooling device as a water cooling section.
  • the cooling device is designed such that the flow rate of water nozzles of the cooling device in the transport direction can be controlled or regulated individually or in sections by an adjusting device which is connected to the control device.
  • the water nozzles are mounted on spray bars. If, viewed along the transport direction, the individual spray bars-which extend transversely to the transport direction over the entire width of the metal strip-each spray bar represents the smallest section per se. On this spray bar, e.g. Tubes or nozzles are over which the water emerges.
  • the sections can then be classified into any size depending on the requirements of each metal strip. So it can also be controlled together several spray bars. But it is also conceivable that each nozzle is controlled individually on each spray bar.
  • the tracking of the area of the tape head and tape foot is carried out in an advantageous embodiment with a temperature measuring device.
  • temperature measuring devices can also be used.
  • the advantages that result are: Matching the temperature profile with the specified one, determining the exact position of the tape head and belt foot and aligning it with the calculated position.
  • the temperature measuring devices can be arranged in various positions. Advantageous positions are in front of the cooling zone, in the middle of the cooling zone, after the cooling zone and before the scissors.
  • the scissors has a device for adjusting the knife gap, wherein the means for adjusting the knife gap, the current thickness of the metal strip can be supplied.
  • the process of cross-cutting can be further optimized and the cutting forces can be further reduced depending on the thickness of the metal strip.
  • the adjustment of the knife gap is made according to the thickness of the metal strip. It gets bigger, the larger the metal band is, which is split.
  • Fig.1 shows a cast-rolling composite plant 1.
  • a continuous casting plant 2 generates a continuously cast continuous material 3 with slab cross-section, which is transported by means of a roller table 4 to a roughing mill 5.
  • the metal strip 6 reaches the separator 7.
  • the separator 7 which is a pendulum scissors in this case.
  • 4 driven gaps between the metal belts 6a-6d by driven rollers of the roller table.
  • the figure also shows the tape heads 31a-31d produced after the transverse cutting as well as the tape feet 32a-32d.
  • Fig. 2 An embodiment according to the invention of the device for cutting metal strips is shown.
  • the first steps up to Vorwalz Sounds 5 are analogous to the prior art in Fig. 1 , Thereafter, no transverse parts, but the metal strip 6 passes undivided through the induction furnace 8, the finishing train 9 and then passes to the cooling zone 10.
  • the cooling zone 10 is detected by means of a first temperature sensor 15, the actual temperature of the metal strip 6 and the controller 14 sent.
  • the desired temperature profile is applied to the metal strip 6 by the Wasserprühbalkenabête 20 or even individual spray bars 21 - the cooling device 19 - are controlled by the control device 14 accordingly.
  • the tape head 31 and band foot 32 of the metal band 6 see Fig.
  • the controller 14 calculates the controller 14 by means of the position sensor 16 and their position determined continuously.
  • the position sensor 16 may be a contacting (eg by the pressing of a roller or the speed at the reel) or a non-contact (optically eg via a laser) design.
  • the Spray bar 21 can be adjusted according to the predetermined temperature profile over the entire passage of the tape head and tape foot. After passing through the cooling device 19, the metal strip 6 has a higher temperature in the area of the later strip head 31 and strip foot 32 than in the upstream and downstream areas. After complete passage of tape head 31d and band foot 32d through the cooling zone 10, the temperature profile is again detected by a second temperature sensor 17 and transmitted to the control device 14 to match the actual profile with the desired profile.
  • Fig. 3a and Fig. 3b is shown how the coil 30 is wrapped warm.
  • the wound coil 30 is shown, inside the tape head 31, a metal strip section with temperature T 0, a metal band portion 33 of length L with temperature T 1 and the tail of the strip 32.
  • the length L of the metal strip section is in this case the length of the circumference of the coil 30.
  • the Temperature of the metal strip section 33 in this case has a higher temperature T 1 as the temperature T 0 of the preceding part of the metal strip.
  • T over the metal strip length x - this is about the extended length - shown.
  • the warm metal band section 33 encloses the coil 30.
  • a typical inventive temperature profile over the temperature profile length xp of a metal strip 30 is shown.
  • the temperature T 1 is higher than after, where a temperature T 0 is set, until finally the area of the tape head 31 follows in which also - over the tape head length xk - again a temperature T 1 is set.
  • the tape head length xk and the tape foot length xf need not be the same, as shown here. They can also have different lengths.
  • Fig. 5a an embodiment of a position sensor 16 is shown in more detail, the roller 41 is pressed onto the metal strip 6. By the movement of the metal strip, the pressed-on roller 41 rotates and this is detected by an optical sensor 42 and the signal generated thereby is further processed in the control device 14. By this signal and various other information such as the desired length of the metal strip, the position of the later tape head and tape foot at least in the range from the beginning of the cooling zone 10 to the scissors 12 can be calculated by the controller 14.
  • the spray bar sections 20 and, if appropriate, the individual spray bars 21 in the cooling zone 10 are controlled such that a desired temperature profile is established on the metal strip 6.
  • Fig. 5b an embodiment of a speed sensor 18 is shown.
  • the position of the metal strip 6 is detected by the rotational speed of the reel 13 by an angle rotary encoder 43.
  • the diameter of the reel 13 and other information that is relevant for the production - such as the desired length of the metal strip - again the position of the tape head 31 and band foot 32 in the cooling zone 10 can be determined ,
  • Fig. 6 is the behavior of the yield stress ⁇ F over the temperature T of a steel H360LA. It can be seen from this that the yield stress decreases from 300 MPa at approx. 600 ° C to 150 MPa at approx. 800 ° C. Thus, by a temperature increase of the metal strip of about 200 ° C, the cutting forces on a pair of scissors can be greatly reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP14179980.9A 2014-08-06 2014-08-06 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique Withdrawn EP2982453A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP14179980.9A EP2982453A1 (fr) 2014-08-06 2014-08-06 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique
US15/328,324 US10870139B2 (en) 2014-08-06 2015-07-09 Adjusting a targeted temperature profile at the strip head and strip base prior to cross-cutting a metal strip
PCT/EP2015/065731 WO2016020134A1 (fr) 2014-08-06 2015-07-09 Réglage d'un profil de température ciblé sur une tête de bande et un pied de bande avant le découpage transversal d'une bande métallique
EP15738039.5A EP3177412B1 (fr) 2014-08-06 2015-07-09 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique
RU2017106342A RU2679321C2 (ru) 2014-08-06 2015-07-09 Установка целевого температурного профиля в головной части полосы и концевой части полосы перед поперечным разделением металлической полосы
CN201580042202.5A CN106536074B (zh) 2014-08-06 2015-07-09 在横切金属带之前调整带头部和带基部处的目标温度分布
MX2017001670A MX2017001670A (es) 2014-08-06 2015-07-09 Regulacion de un perfil de temperatura objetivo en la parte superior de la banda y en la parte inferior de la banda antes del corte transversal de una banda de metal.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14179980.9A EP2982453A1 (fr) 2014-08-06 2014-08-06 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique

Publications (1)

Publication Number Publication Date
EP2982453A1 true EP2982453A1 (fr) 2016-02-10

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ID=51266177

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14179980.9A Withdrawn EP2982453A1 (fr) 2014-08-06 2014-08-06 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique
EP15738039.5A Revoked EP3177412B1 (fr) 2014-08-06 2015-07-09 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP15738039.5A Revoked EP3177412B1 (fr) 2014-08-06 2015-07-09 Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique

Country Status (6)

Country Link
US (1) US10870139B2 (fr)
EP (2) EP2982453A1 (fr)
CN (1) CN106536074B (fr)
MX (1) MX2017001670A (fr)
RU (1) RU2679321C2 (fr)
WO (1) WO2016020134A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2982453A1 (fr) 2014-08-06 2016-02-10 Primetals Technologies Austria GmbH Réglage d'un profil de température ciblé sur une tête de bande et pied de bande devant la partie transversale d'une bande métallique
DE102019217839A1 (de) 2019-11-19 2021-05-20 Sms Group Gmbh Verfahren zum Betreiben einer Anlage der Hüttenindustrie
DE102020201784B4 (de) 2020-02-13 2024-10-10 Schlüter Automation und Sensorik GmbH Materialverfolgungsvorrichtung zur Verfolgung von Walztafeln in einer Kühlstrecke mit einer Mehrzahl von Wasserdüsen in einem Warmwalzwerk, Verfahren zum Betrieb einer Materialverfolgungsvorrichtung, Kühlanlage zum intensiven Kühlen von Walztafeln bei der Herstellung von Blechen in einem Warmwalzwerk und Verfahren zum Betrieb einer Kühlanlage
DE102022200939A1 (de) 2022-01-28 2023-08-03 Sms Group Gmbh Verfahren zum Querteilen eines Metallbandes sowie Walzanlage mit einer Schere zum Querteilen eines Metallbandes

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CN106536074A (zh) 2017-03-22
EP3177412B1 (fr) 2018-10-03
US10870139B2 (en) 2020-12-22
RU2017106342A (ru) 2018-09-06
RU2679321C2 (ru) 2019-02-07
RU2017106342A3 (fr) 2018-12-12
US20170209907A1 (en) 2017-07-27
EP3177412A1 (fr) 2017-06-14
WO2016020134A1 (fr) 2016-02-11
MX2017001670A (es) 2017-05-09
CN106536074B (zh) 2018-09-25

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