EP3535071A1 - Procédé et installation de production d'une bande métallique - Google Patents

Procédé et installation de production d'une bande métallique

Info

Publication number
EP3535071A1
EP3535071A1 EP17787184.5A EP17787184A EP3535071A1 EP 3535071 A1 EP3535071 A1 EP 3535071A1 EP 17787184 A EP17787184 A EP 17787184A EP 3535071 A1 EP3535071 A1 EP 3535071A1
Authority
EP
European Patent Office
Prior art keywords
driver
strip
bending
conveying direction
tensile stress
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
Application number
EP17787184.5A
Other languages
German (de)
English (en)
Other versions
EP3535071B1 (fr
Inventor
Jürgen Seidel
Jens ARTEL
Bernhard Ehls
Hartmut Hof
Babak TALEB-ARAGHI
Christoph Klein
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 EP3535071A1 publication Critical patent/EP3535071A1/fr
Application granted granted Critical
Publication of EP3535071B1 publication Critical patent/EP3535071B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling
    • 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
    • B21B2015/0057—Coiling the rolled product
    • 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
    • B21B2015/0071—Levelling the rolled product
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/04—Flatness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/02—Tension
    • B21B2265/08—Back or outlet tension

Definitions

  • the invention relates to a method for producing a metallic strip, wherein the strip is rolled in a rolling mill, wherein the strip is subjected to a bending straightening process in a bending straightener at a location downstream of the mill in the conveying direction and wherein the strip is at a location downstream of the bending straightener in the conveying direction is reeled on a reel. Furthermore, the invention relates to a system for producing a metallic strip.
  • the invention is therefore based on the object of providing a method and a system with which it is possible to increase the degree of flatness of the strip.
  • the solution to this problem by the invention is characterized in that the strip is held at least temporarily under a first tensile stress between the rolling mill and the bending stripper, that the strip is held in the conveying direction behind the bending stripper at least temporarily under a second tensile stress and that the Band is held at least temporarily under a third tensile stress in the region of the bending straightener, wherein the third tensile stress is greater than the first tensile stress and the second tensile stress.
  • the first tensile stress and the second tensile stress are preferably between 5 and 25 N / mm 2 .
  • the third tensile stress is preferably between 30 and 80 N / mm 2 , more preferably between 40 and 60 N / mm 2 . Excluded from said tension are the head and the end of the band.
  • the train level on the transport route before the bending straightener section and the transport route after the bending straightener section may be different.
  • the mean tension level within the drafting straightener section is preferably determined as a function of the strip material, the strip temperature within the straightening section and the strip thickness, and is preferably set and controlled using a process model.
  • the train level in the adjacent transport routes also defines a process model.
  • the train levels on the long transport route between the last active rolling stand and the first driver of the bending jig and the transport distance from the second driver of the bending jig and the reel driver or the reel is thus lower than the Switzerlandmony within the Bending trek judge distance. Accordingly, the trains are decoupled from the neighboring routes in the area of the bending stretcher route.
  • the tension in the belt is preferably influenced, controlled or regulated by a first driver and a second driver, wherein the first driver is arranged in the conveying direction before the bending straightener and the second driver in the conveying direction behind the bending straightener or the two drivers the extension of the bending straightener in the conveying direction limit (in the latter case, the two drivers are thus part of the bending straightener).
  • the different train levels are thus adjusted by the drivers in front of and behind the bending straightener.
  • a scissors driver or a reel driver instead of the second driver behind the Biegestreckrichter can also take over their task, a scissors driver or a reel driver. In this case, the increased third tensile stress is built up in the area of the bending straightener between the first driver and a reel driver.
  • the distance a then applies between the first driver and the reel driver.
  • the second driver is then opened or not installed.
  • the second tension is then only between reel driver and reel.
  • At least one further driver eg a scissors driver
  • the strip is preferably subjected to cooling in a cooling section between the rolling mill and the bending straightener.
  • cooling in the conveying direction behind the bending straightener no longer takes place.
  • the advantage of this type of cooling of the belt is that in this way the cooling section no longer influences the flatness of the belt.
  • the strip preferably has a temperature in its bending straightening process which is between 20 ° C and 750 ° C, more preferably between 200 ° C and 600 ° C. With the method mentioned, it is particularly advantageous to produce a hot strip having a thickness of between 0.5 mm and 2.5 mm.
  • the plant for producing a metallic strip comprises a rolling mill for rolling the strip, a rolling mill downstream of the rolling mill in the conveying direction of the strip and at least one downstream of the bending straightener in the conveying direction and provides according to the invention that the bending straightener arranged in the conveying direction at the front first driver and a in the conveying direction arranged behind the second driver, wherein the two drivers limit the extension of the bending straightener and wherein the distance in the conveying direction between the first driver and the second driver is at most 20 m. Preferably, the distance is at most 5 m. This minimizes the cycle time through the bending straightener and the associated constriction of the band due to the train.
  • a cooling section is preferably arranged; behind the bending straightener preferably no cooling track follows.
  • the bending straightener has a number of rollers for introducing a bending moment into the belt, wherein the diameter of the rollers is preferably at least 50 mm, particularly preferably at least 100 mm.
  • the bending straightener section comprises a bending straightener consisting of a number of rollers (for example 5 rollers) and / or a back bending unit consisting of further rollers (for example 3 rollers).
  • the driver may be in the classic design of successive two roles or be designed with an offset arrangement of the rollers to produce a wrap angle and optionally additional torque transmission.
  • the drafting strip rolls preferably have internal cooling and / or are externally cooled with stripper plates to shield the water from the strip to allow the strip to cool Reel temperature is not adversely affected.
  • the strip cooling in the bending straightener section is further taken into account and taken into account when determining the target strip temperature behind the cooling section, so that the desired coil temperature is generated.
  • the invention thus relates in particular to a hot bending stripper behind a hot strip mill.
  • the proposed solution thus provides an optimization of the Biegestreckrichter- arrangement and the Switzerlandverotti ready, resulting in the consequence to an improved degree of planarity of the produced strip.
  • a good flatness improvement by means of a bending straightening process results for a given strip material at high strip tension, high strip temperatures and small bending radii of the strip, d. H. with small straightening roll diameters.
  • Too small roll diameter are disadvantageous in terms of maintenance, service life or role wear. Too high a draft and / or too high strip temperatures will result in large width constrictions on the long stretch between the last mill stand of the hot strip mill and the reel. The width constriction due to strip tension is also dependent on the flatness state itself and thus difficult to determine. Furthermore, the cooling section also influences the flatness condition of the belt.
  • Fig. 1 shows a schematic side view of a system for producing a belt
  • Fig. 2 shows the course of the tensile stress in the band over the extension in the longitudinal direction of the plant.
  • FIG. 1 a plant for the production of a steel strip 1 is shown, of a rolling mill 2, only the last rolling mill is indicated, from which the belt 1 in the conveying direction F in the direction of a reel 4 expires (provided here are two reel 4). Between the rolling mill 2 and the reel 4, a bending straightener 3 is arranged, in which the band is directed by a bending straightening process.
  • the bending straightener 3 is limited by a first driver 5 and a second driver 6 in its extension in the conveying direction F, wherein there is a distance a between the two drivers 5, 6.
  • the bending straightener 3 has a number of rollers 8, which are designed to apply corresponding bending stress on the band 1 in a conventional manner.
  • a cooling section 7, which is arranged between the rolling mill 2 and the bending straightener 3 and with which the belt 1 can be cooled. Furthermore, some components are indicated in FIG. 1, which are relevant for carrying out the production process of the strip 1, namely a flatness measuring device 9, a temperature measuring device 10, a temperature measuring device 11, a pair of scissors 12 and a reel temperature measuring device 13.
  • the promotion of the belt 1 between the rolling mill 2 and the reel 4 results from the interaction of the last mill stand of the rolling mill, the first and the second driver 5, 6 and in the embodiment by a reel driver 14.
  • the tension in the band can be influenced.
  • first tensile stress ⁇ which is preferably in a range between 5 and 25 N / mm 2 .
  • a second tensile stress ⁇ 2 which is also preferably in a range between 5 and 25 N / mm 2 .
  • the two tensile stress ⁇ and ⁇ 2 must by no means be the same.
  • the tensile stress in the region of the bending straightener 3 is at a higher level.
  • the present here third tension ⁇ 3 is in a preferred range between 40 and 60 N / mm 2. It is advantageously provided that the distance a is relatively short and preferably extends only over about 5 m. As a result, the throughput time is low by the bending jig 3, resulting in only a small constriction of the band due to the train.
  • the scissors 12 is used in continuous rolling.
  • the bending straightening process is thereby significantly improved. This applies in particular if the process is operated with further parameters, as explained above.
  • the temperature control which is preferably chosen so that the band 1 in the region of the bending jig 3 has a temperature between 200 ° C and 600 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Metal Rolling (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

L'invention concerne un procédé pour la fabrication d'une bande métallique (1), la bande (1) étant laminée dans un laminoir (2), la bande (1) étant soumise à un procédé de cintrage-étirage-dressage dans un dispositif (3) de cintrage-étirage-dressage en un emplacement disposé en aval du laminoir (2) dans le sens du transport (F) et la bande étant bobinée sur une bobine (4) en un emplacement disposé en aval du dispositif (3) de cintrage-étirage-dressage dans le sens du transport (F). Pour augmenter le degré de planéité de la bande, selon l'invention, la bande (1) est maintenue au moins temporairement sous une première contrainte de traction (σ1) entre le laminoir (2) et le dispositif (3) de cintrage-étirage-dressage, la bande (1) est maintenue au moins temporairement sous une deuxième contrainte de traction (σ2) en aval du dispositif (3) de cintrage-étirage-dressage dans le sens du transport (F) et la bande (1) est maintenue au moins temporairement sous une troisième contrainte de traction (σ3) au niveau du dispositif (3) de cintrage-étirage-dressage, la troisième contrainte de traction (σ3) étant supérieure à la première contrainte de traction (σ1) et à la deuxième contrainte de traction (σ2). L'invention concerne en outre une installation pour la fabrication d'une bande métallique.
EP17787184.5A 2016-11-07 2017-10-20 Procédé et installation de production d'une bande métallique Active EP3535071B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016221712 2016-11-07
DE102017202909.9A DE102017202909A1 (de) 2016-11-07 2017-02-23 Verfahren und Anlage zur Herstellung eines metallischen Bandes
PCT/EP2017/076887 WO2018082943A1 (fr) 2016-11-07 2017-10-20 Procédé et installation de production d'une bande métallique

Publications (2)

Publication Number Publication Date
EP3535071A1 true EP3535071A1 (fr) 2019-09-11
EP3535071B1 EP3535071B1 (fr) 2020-04-15

Family

ID=62002860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17787184.5A Active EP3535071B1 (fr) 2016-11-07 2017-10-20 Procédé et installation de production d'une bande métallique

Country Status (4)

Country Link
EP (1) EP3535071B1 (fr)
JP (1) JP6796715B2 (fr)
DE (1) DE102017202909A1 (fr)
WO (1) WO2018082943A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111974801A (zh) * 2020-08-13 2020-11-24 无锡市城南带钢有限公司 热轧带钢的生产方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2537188C3 (de) 1975-08-21 1978-05-18 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh, 4100 Duisburg Verfahren und Vorrichtung zur Herstellung von Warmband mit verbesserten Qualitätseigenschaften
US4316376A (en) 1980-05-15 1982-02-23 Sumitomo Metal Industries, Ltd. Method for preventing wandering of strip under roller leveling in hot rolling line
DE3234160C2 (de) 1982-09-15 1986-10-23 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh, 4100 Duisburg Verfahren und Warmbandstraße zum Herstellen von dünnem Metallband, insbesondere Metall-Breitband, aus Warmband
GB2163689A (en) 1984-08-31 1986-03-05 Davy Mckee Hot rolling metal strip
DE4103804A1 (de) * 1991-02-08 1992-08-13 Bwg Bergwerk Walzwerk Richtanlage fuer endliche baender, insbesondere metallbaender
US6128937A (en) 1997-09-30 2000-10-10 Sms Schloemann-Siemag Aktiengesellschaft Method and installation for shaping metal strip in a hot strip rolling mill
JP3590288B2 (ja) * 1999-02-15 2004-11-17 住友重機械工業株式会社 帯板のレベリング方法およびレベリング装置
DE19953915A1 (de) 1999-11-10 2001-07-05 Thyssenkrupp Stahl Ag Verfahren und Vorrichtung zum Bearbeiten eines Warmbandes auf dem Auslaufrollgang einer Warmbandstraße
EP1230993B1 (fr) 2001-02-07 2007-12-19 SMS Demag AG Dispositif pour améliorer la planéité de bandes laminées, en particulier de bandes d'acier
DE102005060046B4 (de) 2005-12-15 2008-08-14 Siemens Ag Walzstrasse mit mindestens zwei Bandbeeinflussungseinrichtungen und Verfahren zum Betrieb einer solchen Walzstrasse
DE102006029858A1 (de) 2006-06-28 2008-01-03 Sms Demag Ag Verfahren und Vorrichtung zum Aufwickeln eines metallischen Bandes
DE102012020444B4 (de) * 2012-10-18 2015-01-22 Vdeh-Betriebsforschungsinstitut Gmbh Verfahren zur Ermittlung der Zugfestigkeit eines Bandes in einer Richtmaschine und Zugfestigkeits-Softsensor
DE102013214344A1 (de) 2013-07-23 2015-01-29 Sms Siemag Ag Kühlstrecke und Verfahren zum Kühlen von warmgewalztem Metallband
EP3061535B1 (fr) 2015-02-27 2019-02-27 Primetals Technologies Austria GmbH Dispositif de bobineuse doté d'un refroidissement asymétrique de la bande bobinée

Also Published As

Publication number Publication date
JP6796715B2 (ja) 2020-12-09
EP3535071B1 (fr) 2020-04-15
DE102017202909A1 (de) 2018-05-09
JP2020500713A (ja) 2020-01-16
WO2018082943A1 (fr) 2018-05-11

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