EP3990200A1 - Planheitsmessvorrichtung zur messung der planheit eines metallischen bandes - Google Patents
Planheitsmessvorrichtung zur messung der planheit eines metallischen bandesInfo
- Publication number
- EP3990200A1 EP3990200A1 EP20726356.7A EP20726356A EP3990200A1 EP 3990200 A1 EP3990200 A1 EP 3990200A1 EP 20726356 A EP20726356 A EP 20726356A EP 3990200 A1 EP3990200 A1 EP 3990200A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- measuring
- flatness
- measuring roller
- measuring device
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 title abstract description 3
- 239000002826 coolant Substances 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 30
- 238000005098 hot rolling Methods 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- 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 measuring the flatness, the measuring roller being connected to a cooling system with which the measuring roller can be cooled .
- a device of the generic type is known from EP 1 199 543 B1.
- a measuring roller is immersed here with a circumferential section facing away from the strip to be measured into a container filled with cooling liquid, whereby the roller is cooled.
- the measuring roller is sprayed with cooling medium from the radial direction by cooling nozzles.
- the general cooling of rollers is disclosed in EP 0 542 640 A1 and JP 2015- 80794 A.
- the present invention relates to measuring the flatness in a metal strip forming process, in particular and preferably in a hot rolling mill.
- the cooling of the measuring roller during measuring operation has a special effect
- Flatness measuring systems are known from the cold rolling process that are able to are to measure flatness deviations that are not visible due to superimposed tensile stress. These systems measure the tensile stress differences across the width of the strip caused by the flatness deviation. For the most part, these are 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 areas limited locally across the width, these systems are able to measure the local deviation of the tensile stress from the mean tensile stress. These deviations are directly proportional to the flatness deviation
- the measuring roller is cooled by a cooling box arranged below the measuring roller. Since this means that the roller has to be immersed in the belt from below, two additional rollers are required above the belt. These additional rollers have to be pivoted to thread the tape in and out, which requires additional mechanics. Arrangements with only one additional roller lead to unfavorable geometrical relationships between the distance between the rollers and the belt width, which leads to measurement errors with the slightest alignment errors. An arrangement of a single roller with sufficient spacing leads to a wrap angle that is too small and thus to a considerable impairment of the measurement accuracy.
- the cooling by a cooling medium located in a cooling box is not effective, since only low relative speeds are achieved on the roller surface due to the static medium can be.
- the invention is based on the idea 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 plants, while at the same time ensuring that a high degree of measuring accuracy can be maintained.
- the flatness measuring roller should be cooled in such a way that the cooling of the roller 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 roller can be achieved. Furthermore, the sensor system used, which is sensitive enough to measure the flatness defects occurring during hot rolling with sufficient accuracy, should be provided protected from excessive heat input. The cooling must not cause any thermal or mechanical interference with 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 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 applied to the surface in one direction of spraying the measuring roller can be ejected, the ejection direction meeting a surface section of the measuring roller and the angle between the ejection direction and the tangent to the measuring roller at the location of the surface section being 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 medium 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 of the flat jet nozzles preferably extends in the direction of the roller axis. Although a number of spray nozzles is preferably provided, it is also possible that only a single wide slot nozzle is arranged on the nozzle bar.
- the spray nozzles are preferably aligned in such a way that the cooling medium is applied against the running direction of the measuring roller.
- the direction of movement of the ejected cooling medium is opposite to that 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 to 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 applied to the surface of the Measuring roller can be ejected, the ejection direction meeting a surface section of the measuring roller and the angle between the ejection 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 a housing which encloses the nozzle bar or bars 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 the passage of cooling medium difficult.
- the housing is preferably dimensioned such that the gaps are in the range between 0.01 mm and 2.0 mm.
- means for applying a (barrier) gas are arranged in the area of the gaps, with which a gas flow can be conducted into the interior of the housing. In this way, the escape of cooling medium from the interior of the housing can be minimized or even prevented entirely.
- the means for supplying 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 flatness measuring device is preferably part of a hot rolling plant.
- 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 such that the long axis of the oval circumscribing the jet is preferably parallel to the roller axis; however, the angle between the long beam axis and the roller axis can also be up to 10 °.
- the alignment of the spray nozzles is carried out in such a way 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 spacing of the nozzles along the roll barrel is preferably selected so that the roll surface is exposed to the roll surface as uniformly as possible along the points of impact of the cooling medium in accordance with the geometry of the jets.
- Said further nozzle bar is placed at a further position over the circumference of the roll in relation to the first-mentioned nozzle bar.
- the further nozzle bar can be varied with regard to its geometry and / or its arrangement and / or its alignment 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 mentioned further development provides that the area of the measuring roller, which is acted upon by the spray cooling, is sealed off from the environment by the mentioned closed housing.
- the gap between the rotating roller and the housing is preferably minimized to such an extent that the running In operation, there is no longer any contact between the housing and the rotating measuring roller.
- Enclosure occurs is preferably designed in such a way that the cooling medium collects directly at the gap and thus the roller surface is evenly applied with cooling medium over the entire width of the bale.
- the roller surface is preferably provided with a rough surface and is kept in constant motion for cooling.
- the speed of rotation of the roller should preferably not fall below a minimum predetermined 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 housing.
- 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, at which the roller surface emerges from the housing, can also be designed in such a way 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 angle of incidence.
- the arrangement of the nozzles against the running direction of the roll and the design of the housing advantageously prevent the quality of the measured strips from being influenced, since the cooling medium is effectively in the housing can be kept, collected and returned to the cycle in a controlled manner.
- the cooling medium is brought into the contact area between the hot strip and the measuring roller in a controlled manner. This can dampen the heat transfer and thus minimize the heat input into the roll. At the same time, wear is minimized by utilizing the aquaplaning effect.
- FIG. 1 schematically shows a flatness measuring device with a measuring roller and a cooling system, the conveying direction of the strip to be measured (not shown) being perpendicular to the plane of the drawing
- FIG. 2 schematically a spray nozzle which applies the cooling medium
- a flatness measuring device 1 which comprises a measuring roller 2 which is used to contact a metallic strip (not shown). The degree of flatness of the strip can thus be determined in a manner known per se. So that the flatness measuring device 1 can also be used in a hot rolling mill, the measuring roller 2 must be cooled, for which a cooling system 3 is available.
- the cooling system 3 comprises a nozzle bar 4, the longitudinal axis of which lies parallel to the roller axis a, as can be seen from FIG. At regular intervals 4 spray nozzles 5 are arranged on the nozzle bar; the distance is marked by the double arrow in FIG. Each spray nozzle 5 applies a jet of cooling medium that is relatively flat. This is illustrated in FIG.
- the cooling medium is discharged from the spray nozzle 5 in the spray direction b, the spray nozzle 5 being designed as a slot nozzle or flat jet nozzle. Accordingly, the cooling medium reaches the surface of the measuring roller 2 with an essentially oval contact surface that 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 thus 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 tape 12 and rotates in the direction of rotation R, with its roller axis a being perpendicular to the plane of the drawing in FIG.
- the cooling system 3 initially comprises an (upper) nozzle bar 4 on which the spray nozzles 5 are arranged. It also comprises a (lower) nozzle bar 7, on which spray nozzles 5 are likewise arranged. This nozzle bar 7 is optionally arranged and offset in the circumferential direction.
- the orientation of the spray nozzles 5 for cooling the surface of the measuring roller 2 is essential.
- FIG. 3 shows that the spray nozzles 5 apply their cooling medium with their spray direction b at a point or a surface section 6 of the measuring roller 2.
- an angle a results between the injection direction b and the tangent t.
- This angle a is relatively small and 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 Coolant on the surface of the measuring roller in the area of the surface section 6, however, the same geometric relationships apply.
- 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 interior of the housing. Liquid leakage can be completely prevented by applying sealing air (as described above).
- cooling medium 11 collects, which cools the measuring roller 2 over the entire width as it rotates.
- the explained geometry ensures that the measuring function of the measuring roller 2 is not impaired. This is not the case with previously known solutions.
Abstract
Description
Claims
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 (de) | 2019-06-25 | 2020-05-13 | Planheitsmessvorrichtung zur messung der planheit eines metallischen bandes |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3990200A1 true EP3990200A1 (de) | 2022-05-04 |
EP3990200C0 EP3990200C0 (de) | 2024-02-14 |
EP3990200B1 EP3990200B1 (de) | 2024-02-14 |
Family
ID=73747206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20726356.7A Active EP3990200B1 (de) | 2019-06-25 | 2020-05-13 | Planheitsmessvorrichtung zur messung der planheit eines metallischen bandes |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220347730A1 (de) |
EP (1) | EP3990200B1 (de) |
JP (1) | JP7245365B2 (de) |
CN (1) | CN114025893A (de) |
DE (1) | DE102019217569A1 (de) |
WO (1) | WO2020259912A1 (de) |
Families Citing this family (1)
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 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
FR2815705B1 (fr) * | 2000-10-20 | 2003-04-18 | Val Clecim | Procede et dispositif de detection de planeite |
DE10224938B4 (de) * | 2002-06-04 | 2010-06-17 | Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh | Verfahren und Vorrichtung zur Planheitsmessung von Bändern |
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 |
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 |
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 |
KR102224516B1 (ko) * | 2018-06-13 | 2021-03-08 | 노벨리스 인크. | 롤 가공처리에서 점성 재료를 격납하기 위한 시스템 및 방법 |
-
2019
- 2019-11-14 DE DE102019217569.4A patent/DE102019217569A1/de active Pending
-
2020
- 2020-05-13 WO PCT/EP2020/063312 patent/WO2020259912A1/de unknown
- 2020-05-13 CN CN202080047374.2A patent/CN114025893A/zh active Pending
- 2020-05-13 US US17/621,473 patent/US20220347730A1/en active Pending
- 2020-05-13 EP EP20726356.7A patent/EP3990200B1/de active Active
- 2020-05-13 JP JP2021572391A patent/JP7245365B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
US20220347730A1 (en) | 2022-11-03 |
JP2022538520A (ja) | 2022-09-05 |
DE102019217569A1 (de) | 2020-12-31 |
EP3990200C0 (de) | 2024-02-14 |
JP7245365B2 (ja) | 2023-03-23 |
EP3990200B1 (de) | 2024-02-14 |
WO2020259912A1 (de) | 2020-12-30 |
CN114025893A (zh) | 2022-02-08 |
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