EP3990200B1 - Dispositif de mesure de planéité conçu pour mesurer la planéité d'une bande métallique - Google Patents

Dispositif de mesure de planéité conçu pour mesurer la planéité d'une bande métallique Download PDF

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Publication number
EP3990200B1
EP3990200B1 EP20726356.7A EP20726356A EP3990200B1 EP 3990200 B1 EP3990200 B1 EP 3990200B1 EP 20726356 A EP20726356 A EP 20726356A EP 3990200 B1 EP3990200 B1 EP 3990200B1
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EP
European Patent Office
Prior art keywords
roller
measuring
planarity
measuring device
measuring roller
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
EP20726356.7A
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German (de)
English (en)
Other versions
EP3990200A1 (fr
EP3990200C0 (fr
Inventor
Frank Gorgels
Andreas Kastner
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
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Publication date
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Publication of EP3990200A1 publication Critical patent/EP3990200A1/fr
Application granted granted Critical
Publication of EP3990200B1 publication Critical patent/EP3990200B1/fr
Publication of EP3990200C0 publication Critical patent/EP3990200C0/fr
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • 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

Definitions

  • the invention relates to a flatness measuring device for measuring the flatness of a metallic strip, comprising a measuring roller which has a roller axis and which is designed to make contact with the strip for the purpose of flatness measurement, the measuring roller being connected to a cooling system with which the measuring roller can be cooled .
  • a flatness measuring device is from the EP 1 199 543 B1 known.
  • a measuring roll with a circumferential section facing away from the strip to be measured is immersed in a container filled with coolant, whereby the roll is cooled.
  • the measuring roller is sprayed with cooling medium from the radial direction by cooling nozzles.
  • the general cooling of rollers reveals this EP 0 542 640 A1 and the JP 2015-80794 A .
  • the US 4,188,809 A which forms the basis for the preamble of claim 1, discloses a measuring roll in a cold rolling mill, under which a number of sensors are arranged, with which the size of a gap that forms between the sensors and the measuring roll is measured. To clean the measuring roll, it is blown on using air nozzles.
  • the WO 2006/134696 A1 and the EP 1 199 543 B1 show similar solutions.
  • the present invention relates to flatness measurement in a forming process of metallic strip, in particular and preferably in a hot rolling mill.
  • the cooling of the measuring roller during measuring operation is particularly important, especially if it is used in a hot rolling mill.
  • Flatness measuring systems are known from the cold rolling process that are able to measure flatness deviations that are not visible due to superimposed tensile stress. These systems measure the tension differences caused by the flatness deviation across the width of the strip. These are predominantly deflection pulleys that are equipped with sensors that are able to measure the radial force exerted on the deflection pulley by the tensile stress. By measuring the radial force in localized areas across the width, these systems are able to measure the local deviation of the tensile stress from the average tensile stress. These deviations are directly proportional to the flatness deviation.
  • the measuring roll is cooled by a cooling box arranged below the measuring roll. Since the roll has to be immersed in the belt from below, two additional rolls are necessary above the belt. These additional rollers must be pivoted to thread the belt in and out, which requires additional mechanics. Arrangements with only one additional roller lead to unfavorable geometric relationships between the distance between the rollers and the belt width, which leads to measurement errors with even the slightest alignment errors. Arranging a single roller with sufficient spacing leads to a wrap angle that is too small and thus significantly impairs the measurement accuracy. Cooling by a cooling medium located in a cooling box is not effective because the stationary medium can only achieve low relative speeds on the roller surface.
  • the invention is based on the task of developing a flatness measuring device of the generic type in such a way that it is possible to use it even at high temperatures and in particular in hot rolling mills, while at the same time ensuring that a high level of measuring accuracy can be maintained.
  • the flatness measuring roll should be cooled in such a way that the cooling of the roll is so effective, even at temperatures of the strip to be measured up to 1,000 °C, that a practical service life of the measuring roll can be achieved. Furthermore, the sensor system used, which is sensitive enough to measure the flatness defects that occur during hot rolling with sufficient accuracy, should be protected from excessive heat input. The cooling must not cause any thermal or mechanical disruption to the measurement. The cooling medium should be used in such a way that the quality of the product produced is not influenced by uncontrolled exposure to the cooling medium.
  • the measuring roller is designed as a deflection roller which is equipped with a sensor system which is able to measure the tension exerted on the deflection roller by the tensile stress
  • the flatness measuring device is part of a hot rolling mill and that the cooling system has a nozzle bar which extends parallel to the roller axis, with at least one, preferably a number, spray nozzles being arranged on the nozzle bar, with which cooling medium is sprayed onto the surface of the in an ejection direction Measuring roller can be sprayed out, wherein the spraying direction hits a surface section of the measuring roller and the angle between the spraying direction and the tangent to the measuring roller at the location of the surface section is less than 30 °.
  • the angle is preferably between 0° and 20°, particularly preferably between 0° and 10°.
  • the spray nozzles are preferably flat jet nozzles. It is preferably provided that the flat jet nozzles emit a cooling media jet that is at least 4 times as wide as it is thick, particularly preferably at least 8 times as wide as it is thick. The width of the jet from the flat jet nozzles preferably extends in the direction of the roller axis.
  • the spray nozzles are preferably aligned so that the cooling medium is applied counter to the direction of travel of the measuring roller.
  • the direction of movement of the ejected cooling medium is opposite to the direction of movement of the surface of the roller where the coolant contacts the roller.
  • the cooling system can have at least one further nozzle bar, which extends parallel to the roller axis and is arranged offset from the first, above-mentioned nozzle bar in the circumferential direction of the measuring roller, with a number of spray nozzles being arranged on the further nozzle bar, with which cooling medium is sprayed onto the surface of the in an ejection direction Measuring roller can be sprayed out, the spraying direction hitting a surface section of the measuring roller and the angle between the spraying direction and the tangent to the measuring roller at the location of the surface section being less than 30°, preferably between 0° and 20° and particularly preferably between 0° and 10 ° is.
  • the cooling system comprises an enclosure which encloses the nozzle bar(s) and a circumferential section, preferably at least 180° of the circumference, of the measuring roller.
  • Two gaps can be formed between the housing and the measuring roller, which make it more difficult for the cooling medium to pass through.
  • the housing is preferably dimensioned so that the gaps are in the range between 0.01 mm and 2.0 mm.
  • means for feeding a (barrier) gas are arranged in the area of the gap, with which a gas stream can be directed into the interior of the enclosure.
  • the means for feeding a gas can comprise slot nozzles which extend in the longitudinal direction of the gap, the slot nozzles preferably being integrated into the housing in the area of the gap.
  • the proposed concept is therefore based on spray cooling of the measuring roller, which is arranged on (at least) one nozzle bar aligned parallel to the roller axis.
  • Flat jet nozzles are preferably used as spray nozzles.
  • the flat jet is aligned so that the long axis of the oval surrounding the jet is preferably parallel to the roller axis; However, the angle between the long jet axis and the roller axis can be up to 10°.
  • the spray nozzles are also aligned so that the jet hits the roller surface at a flat angle, preferably between 0° and 10°; 0° means that the beam hits the measuring roller tangentially.
  • the distance between the nozzles along the roll barrel is preferably chosen so that the impact on the roll surface is as uniform as possible along the impact points of the cooling medium in accordance with the geometry of the jets.
  • the additional nozzle bar mentioned is placed at a further position above the circumference of the roll in relation to the first-mentioned nozzle bar.
  • the further nozzle bar can be varied in terms of its geometry and/or its arrangement and/or its orientation of the nozzles.
  • the output of the cooling medium can vary with regard to the pressure and / or the flow rate of the cooling medium in relation to the first-mentioned nozzle bar.
  • the development mentioned provides that the area of the measuring roller, which is subjected to the spray cooling, is sealed off from the environment by the closed enclosure mentioned.
  • the gap between the rotating roller and the housing is preferably minimized to such an extent that while running During operation there is no longer any contact between the housing and the rotating measuring roller.
  • the area of the enclosure immediately adjacent to the gap between the roll surface and the enclosure, where the rotating roll enters the enclosure, is preferably designed so that the cooling medium collects directly at the gap and so the roll surface is evenly coated with cooling medium over the entire width of the bale applied.
  • the roller surface is preferably provided with a rough surface and is constantly kept in motion for cooling. The rotational speed of the roller should preferably not fall below a minimum specified value.
  • the gap between the housing and the measuring roller can be acted upon by a gaseous medium.
  • the direction of flow of the medium is preferably directed into the interior of the enclosure.
  • the nozzle for applying the medium is preferably designed as a slot nozzle.
  • the slot nozzle is preferably integrated into the area of the gap.
  • the gap between the roller surface and the housing, where the roller surface emerges from the housing can also be designed so that a controlled small amount of the cooling medium remains on the surface of the measuring roller.
  • the proposed solution ensures effective cooling of the measuring roller without disturbing the measuring signal due to the jet geometry of the cooling nozzles and the flat impact angle.
  • the arrangement of the nozzles against the direction of travel of the roll and the design of the enclosure advantageously prevents any influence on the quality of the measured strips, since the cooling medium is effectively contained in the enclosure can be held, collected and returned to the circulation in a controlled manner.
  • the cooling medium is brought into the contact area between the hot belt and the measuring roller in a controlled manner. This allows the heat transfer to be dampened and the heat input into the roll to be minimized. At the same time, wear is minimized by exploiting the aquaplaning effect.
  • a flatness measuring device 1 which includes a measuring roller 2, which is used to contact a metallic strip, not shown.
  • the degree of flatness of the band can thus be determined in a manner known per se.
  • the flatness measuring device 1 is part of a hot rolling mill, the measuring roll 2 must be cooled, for which a cooling system 3 is available.
  • the cooling system 3 includes a nozzle bar 4, the longitudinal axis of which is parallel to the roller axis a, as can be seen Figure 1 results. 4 spray nozzles 5 are arranged at equal intervals on the nozzle bar; the distance is indicated by the double arrow in Figure 1 marked.
  • Each spray nozzle 5 delivers a jet of cooling medium that is relatively flat. This is in Figure 2 illustrated.
  • the cooling medium is discharged from the spray nozzle 5 in the spray direction b, the spray nozzle 5 being designed as a wide slot nozzle or flat jet nozzle. Accordingly, the cooling medium reaches the surface of the measuring roller 2 with a substantially oval contact surface which has a width B and a thickness D.
  • the contact surface that the cooling medium has on the surface of the measuring roller 2 can therefore be assigned a longitudinal axis c, which is parallel to the roller axis a.
  • the width B is at least four times as large as the (maximum) thickness D, preferably even at least eight times as large.
  • the measuring roller 2 contacts the belt 12 and rotates in the direction of rotation R, whereby in Figure 3 whose roller axis a is perpendicular to the drawing plane.
  • the cooling system 3 initially includes an (upper) nozzle bar 4 on which the spray nozzles 5 are arranged. Furthermore, it comprises a (lower) nozzle bar 7, on which spray nozzles 5 are also arranged. This nozzle bar 7 is optional and arranged offset in the circumferential direction.
  • the alignment of the spray nozzles 5 for cooling the surface of the measuring roller 2 is essential Figure 3 It can be seen that the spray nozzles 5, with their spray direction b, discharge their cooling medium at a point or a surface section 6 of the measuring roller 2. If you place a tangent t on the measuring roller 2 at the point or surface section 6, an angle ⁇ results between the spray direction b and the tangent t. This angle ⁇ is relatively small and is a maximum of 20°. The preferred range for the angle ⁇ is between 0° and 10°.
  • the two nozzle bars 4 and 7 are arranged offset in the circumferential direction over the measuring roller 2. For the angular relationships of the impact of the However, the same geometric conditions apply when the cooling medium is applied to the surface of the measuring roller in the area of the surface section 6.
  • the flatness measuring device 1 can also have a housing 8, which accommodates the nozzle bars 4 and 7 (not shown here) and encloses the measuring roller over a circumferential section of a good 180 °. Small gaps 9 and 10 ensure that only a small amount of cooling medium escapes from the inside of the enclosure. By applying sealing air (as described above), liquid leakage can be completely prevented.
  • cooling medium 11 collects, which cools the measuring roller 2 over its entire width as it rotates.
  • the geometry explained when aligning the spray nozzles 5 ensures that the measuring function of the measuring roller 2 is not impaired. This is not the case with previously known solutions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Claims (10)

  1. Dispositif de mesure de planéité (1) permettant de mesurer la planéité d'une bande métallique, comprenant un rouleau de mesure (2) qui présente un axe de rouleau (a) et qui est conçu pour entrer en contact avec la bande dans le but de mesurer la planéité, le rouleau de mesure (2) étant en liaison avec un système de refroidissement (3) au moyen duquel le rouleau de mesure (2) peut être refroidi,
    caractérisé en ce que
    le rouleau de mesure (2) est conçu sous la forme d'un rouleau de renvoi, qui est équipé d'un système de capteurs capable de mesurer la force radiale exercée sur le rouleau de renvoi par la contrainte de traction,
    en ce que le dispositif de mesure de planéité (1) fait partie d'une installation de laminage à chaud et
    en ce que le système de refroidissement (3) est doté d'une barrette à buses (4) qui s'étend parallèlement à l'axe de rouleau (a), au moins une, de préférence un certain nombre, de buses de pulvérisation (5) étant disposées sur la barrette à buses (4), au moyen de laquelle un fluide de refroidissement peut être pulvérisé sur la surface du rouleau de mesure (2) dans une direction de pulvérisation (b), la direction de pulvérisation (b) atteignant une section de surface (6) du rouleau de mesure (2), et l'angle (α) entre la direction de pulvérisation (b) et la tangente (t) au rouleau de mesure (2) à l'endroit de la section de surface (6) étant inférieur à 30°.
  2. Dispositif de mesure de planéité selon la revendication 1, caractérisé en ce que l'angle (α) est compris entre 0° et 20°, de préférence entre 0° et 10°.
  3. Dispositif de mesure de planéité selon la revendication 1 ou 2, caractérisé en ce que les buses de pulvérisation (5) sont des buses à jet plat qui projettent de préférence un jet de fluide de refroidissement qui est au moins 4 fois plus large (B) qu'épais (D), de préférence au moins 8 fois plus large qu'épais.
  4. Dispositif de mesure de planéité selon la revendication 3, caractérisé en ce que la largeur (B) du jet des buses à jet plat (5) s'étend dans la direction de l'axe (a) du rouleau.
  5. Dispositif de mesure de planéité selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les buses de pulvérisation (5) sont orientées de telle sorte que le fluide de refroidissement est distribué dans le sens opposé au sens de déplacement du rouleau de mesure (2).
  6. Dispositif de mesure de planéité selon l'une des revendications 1 à 5, caractérisé en ce que le système de refroidissement (3) comporte au moins une autre barrette à buses (7) qui s'étend parallèlement à l'axe (a) du rouleau et qui est décalée par rapport à la première barrette à buses (4) dans la direction circonférentielle du rouleau de mesure (2), un certain nombre de buses de pulvérisation (5) étant disposées sur l'autre barrette à buses (7), au moyen desquelles un fluide de refroidissement peut être pulvérisé sur la surface du rouleau de mesure (2) dans une direction de pulvérisation (b), la direction de pulvérisation (b) atteignant une section de surface (6) du rouleau de mesure (2) et l'angle (α) entre la direction de pulvérisation (b) et la tangente (t) au rouleau de mesure (2) à l'endroit de la section de surface (6) étant inférieur à 30°, de préférence compris entre 0° et 20° et de manière particulièrement préférée entre 0° et 10°.
  7. Dispositif de mesure de planéité selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le système de refroidissement (3) comprend une enceinte (8) qui entoure la ou les barrettes à buses (4, 7) ainsi qu'une partie de la circonférence, de préférence au moins 180° de la circonférence, du rouleau de mesure (2).
  8. Dispositif de mesure de planéité selon la revendication 7, caractérisé en ce que deux fentes (9, 10) sont formées entre l'enceinte (8) et le rouleau de mesure (2), ce qui rend difficile le passage du fluide de refroidissement.
  9. Dispositif de mesure de planéité selon la revendication 8, caractérisé en ce que des moyens d'alimentation en gaz sont disposés au niveau des fentes (9, 10) à travers lesquelles un flux de gaz peut être dirigé vers l'intérieur de l'enceinte (8).
  10. Dispositif de mesure de planéité selon la revendication 9, caractérisé en ce que les moyens d'alimentation en gaz comprennent des buses à fente qui s'étendent dans la direction longitudinale des fentes (9, 10), les buses à fente étant de préférence intégrées dans l'enceinte (8) au niveau des fentes (9, 10).
EP20726356.7A 2019-06-25 2020-05-13 Dispositif de mesure de planéité conçu pour mesurer la planéité d'une bande métallique Active EP3990200B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102019209124 2019-06-25
DE102019217569.4A DE102019217569A1 (de) 2019-06-25 2019-11-14 Planheitsmessvorrichtung zur Messung der Planheit eines metallischen Bandes
PCT/EP2020/063312 WO2020259912A1 (fr) 2019-06-25 2020-05-13 Dispositif de mesure de planéité conçu pour mesurer la planéité d'une bande métallique

Publications (3)

Publication Number Publication Date
EP3990200A1 EP3990200A1 (fr) 2022-05-04
EP3990200B1 true EP3990200B1 (fr) 2024-02-14
EP3990200C0 EP3990200C0 (fr) 2024-02-14

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EP20726356.7A Active EP3990200B1 (fr) 2019-06-25 2020-05-13 Dispositif de mesure de planéité conçu pour mesurer la planéité d'une bande métallique

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Country Link
US (1) US12036592B2 (fr)
EP (1) EP3990200B1 (fr)
JP (1) JP7245365B2 (fr)
CN (1) CN114025893B (fr)
DE (1) DE102019217569A1 (fr)
WO (1) WO2020259912A1 (fr)

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN116879099B (zh) * 2023-09-07 2023-11-17 江苏凯达重工股份有限公司 一种轧辊的磨损性能测试方法及测试装置

Citations (1)

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EP1199543A1 (fr) * 2000-10-20 2002-04-24 Vai Clecim Procédé et dispositif de detection de planéité

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JPS588458B2 (ja) 1977-03-30 1983-02-16 株式会社日立製作所 形状検出装置
US5212975A (en) 1991-05-13 1993-05-25 International Rolling Mill Consultants, Inc. Method and apparatus for cooling rolling mill rolls and flat rolled products
DE19918699B4 (de) * 1999-04-26 2008-03-27 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Meßrolle zum Feststellen von Planheitsabweichungen
FR2803548B1 (fr) 2000-01-10 2002-04-19 Vai Clecim Procede et dispositif de controle thermique du profil d'un cylindre dans un laminoir
DE10224938B4 (de) * 2002-06-04 2010-06-17 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Verfahren und Vorrichtung zur Planheitsmessung von Bändern
JP4504874B2 (ja) * 2005-06-17 2010-07-14 三菱日立製鉄機械株式会社 形状検出装置及びその方法
JP4644047B2 (ja) 2005-06-17 2011-03-02 三菱日立製鉄機械株式会社 蛇行検出装置及びその方法
DE102006059244A1 (de) * 2006-10-21 2008-04-24 Sms Demag Ag Vorrichtung zur Messung des Bandzuges in einem metallischen Band
CN101648220B (zh) * 2008-08-15 2011-11-23 宝山钢铁股份有限公司 一种轧辊冷却的在线检测方法
JP6090105B2 (ja) 2013-10-22 2017-03-08 Ｊｆｅスチール株式会社 仕上げ圧延設備の圧延ワークロールの冷却装置および冷却方法
DE102014224318A1 (de) * 2014-11-27 2016-06-02 Sms Group Gmbh Vorrichtung und Verfahren zum Kühlen einer Rolle
GB2537162B (en) 2015-04-10 2017-04-19 Primetals Technologies Austria GmbH Work roll cooling apparatus and method
WO2019241550A1 (fr) * 2018-06-13 2019-12-19 Novelis Inc. Système et procédé pour retenir des matériaux visqueux dans un traitement au rouleau

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EP1199543A1 (fr) * 2000-10-20 2002-04-24 Vai Clecim Procédé et dispositif de detection de planéité

Also Published As

Publication number Publication date
JP7245365B2 (ja) 2023-03-23
JP2022538520A (ja) 2022-09-05
CN114025893B (zh) 2024-06-21
DE102019217569A1 (de) 2020-12-31
US20220347730A1 (en) 2022-11-03
EP3990200A1 (fr) 2022-05-04
CN114025893A (zh) 2022-02-08
EP3990200C0 (fr) 2024-02-14
WO2020259912A1 (fr) 2020-12-30
US12036592B2 (en) 2024-07-16

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