EP0936002B1 - Procédé de laminage pour une bande, en particulier une bande métallique - Google Patents

Procédé de laminage pour une bande, en particulier une bande métallique Download PDF

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Publication number
EP0936002B1
EP0936002B1 EP99102576A EP99102576A EP0936002B1 EP 0936002 B1 EP0936002 B1 EP 0936002B1 EP 99102576 A EP99102576 A EP 99102576A EP 99102576 A EP99102576 A EP 99102576A EP 0936002 B1 EP0936002 B1 EP 0936002B1
Authority
EP
European Patent Office
Prior art keywords
strip
rolling
thickness
roll
stand
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.)
Expired - Lifetime
Application number
EP99102576A
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German (de)
English (en)
Other versions
EP0936002A3 (fr
EP0936002A2 (fr
Inventor
Olaf Norman Dr.-Ing. Jepsen
Alfred Eugen Dipl.-Ing. Metzul
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 Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
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Publication of EP0936002A3 publication Critical patent/EP0936002A3/fr
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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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B21B37/26—Automatic variation of thickness according to a predetermined programme for obtaining one strip having successive lengths of different constant thickness

Definitions

  • Such a rolling process is for example from DE 29 44 035 C2 known.
  • the object of the present invention is a method state at which the impact on the Rolling process when changing the strip thickness as short a transition area as possible accrues.
  • the object is achieved in that the changes in the nominal thickness values in the possible one downstream of the rolling stand Roll stands in such a way that for each of these roll stands Quotient of its current thickness setpoint and its current one Target inlet thickness is a constant.
  • the peculiarity of the rolling process is that only in a change in the first rolling stand rolling the change in thickness relative thickness decrease occurs in all subsequent rolling stands however the relative decrease always remains constant. This will minimizes the mass flow disturbance between the mill stands, and it is no or only a very slight adjustment of the speeds of the Roll stands required. Thus, the length of the transition area be kept very short.
  • Roll stands Due to the constant relative decrease in stitch in the following Roll stands are of course also their target thickness values possibly changed in a ramp shape. With a desired change in thickness behind the last rolling stand can also be this relationship between the thickness setpoints all other changes the target thickness values in the upstream rolling stands predict.
  • a cold rolling mill consists, for example, of six rolling stands 1 to 6 arranged one behind the other.
  • a steel strip 7 is rolled from an initial thickness d 0 to a final thickness d 6 .
  • the strip 7 is first unwound from a decoiler 8, then passes through a strip store 9 and is then threaded into the rolling train. After the rolling mill, the strip 7 is wound up on a reel 10. During the rolling of the strip 7, the strip 7 should run into each of the roll stands 1 to 6 with a nominal inlet thickness e 1 * to e 6 * according to a rolling schedule. Each of the roll stands 1 to 6 is also given a target thickness value a 1 * to a 6 * with which the strip 7 is to run out of the respective roll stand 1 to 6.
  • the strip store 9 between the uncoiler 8 and the first roll stand 1 is used to store a certain amount of tape 7. So can cause short disruptions when unwinding or welding on new belt 11 to a belt already entering the rolling mill 7 can be bridged without causing the rolling mill to stop comes.
  • the new strip 11 applied has a different strip thickness d 0 than the currently rolled strip 7.
  • the applied strip 11 is therefore subjected to different rolling conditions.
  • a transition region 7 'must therefore be provided, in which the rolling conditions are adapted to the new strip 11.
  • the nominal thickness value a 1 * of the first roll stand 1 is changed in a ramp-like manner from an initial nominal value to an end nominal value during the rolling of the transition region 7 'of the strip 7.
  • the thickness setpoints a 2 * to a 6 * are also changed in a ramp from initial setpoints to end setpoints. The changes take place in each of the roll stands 2 to 6 at the point in time at which the transition region 7 'is rolled by the respective roll stand 2 to 6.
  • the ramp-shaped changes in the target thickness values a 2 * to a 6 * take place in such a way that in each of the roll stands 2 to 6 the quotient of the current target thickness value a 2 * to a 6 * of this roll stand 2 to 6 and the current target Inlet thickness e 2 * to e 6 * of this roll stand 2 to 6 is a constant.
  • changing the thickness setpoint can be limited to a part of the roll stands 1 to 6, e.g. B. on the last three roll stands 4 to 6.
  • the thickness setpoints a 1 * to a 3 * of the roll stands 1 to 3 are kept constant, while the thickness setpoints a 4 * to a 6 * of the roll stands 4 to 6 can be changed in a ramp.
  • a change in the relative pass reduction takes place only in the fourth roll stand 4. The relative pass decreases of the roll stands 5 and 6 remain constant. This case is shown in Figure 2.
  • the control dynamics of the roll stands 1 to 6 allow it, even the nominal thickness values a 1 * to a 4 * or a 5 * of the roll stands 1 to 4 or 5 can be kept constant. In this case, only the thickness setpoints a 5 * and a 6 * of the last two roll stands 5, 6 or only the thickness setpoint a 6 * of the last roll stand 6 need to be changed from an initial setpoint to an end setpoint ,
  • the method according to the invention can also be used in hot rolling mills.
  • a hot rolling mill is shown in Figure 3.
  • a descaler 12 and a compensating furnace 13 are arranged in front of the first roll stand 1.
  • the slab 14 is heated through before being introduced into the hot rolling mill and, if necessary, also temporarily stored.
  • the slab 14 is to be rolled into two or three strips with different final thicknesses a 6 *.
  • the individual strips are then separated behind the last roll stand 6 by means of a pair of scissors 15 and alternately wound onto one of the reels 10, 10 '.

Claims (6)

  1. Procédé de laminage pour une bande (7), en particulier une bande métallique (7), par exemple une bande d'acier (7), dans un train de laminoirs comportant plusieurs cages de laminoir (1 à 6) agencées les unes derrière les autres, dans lequel
    pendant le laminage de la bande (7), celle-ci doit entrer dans chacune des cages de laminoir (1 à 6) avec une épaisseur d'entrée de consigne (e1* à e6*), et on définit pour chacune des cages de laminoir (1 à 6) une valeur de consigne de l'épaisseur (a1* à a6*) avec laquelle la bande (7) doit sortir hors de la cage de laminoir respective (1 à 6),
    pendant le laminage d'une zone de transition (7') de la bande (7), la valeur de consigne de l'épaisseur (par exemple a4*) de l'une des cages de laminoir (par exemple 4) est modifiée pour passer d'une valeur de consigne initiale à une valeur de consigne finale,
    dans des cages de laminoir éventuelles (par exemple 5, 6) agencées en aval de ladite cage de laminoir (par exemple 4), pendant le laminage de la zone de transition (7') de la bande (7), ses valeurs de consigne de l'épaisseur (par exemple a5*, a6*) sont également modifiées pour passer des valeurs de consigne initiales à des valeurs de consigne finales,
    les modifications des valeurs de consigne de l'épaisseur (par exemple a5*, a6*) dans les cages de laminoir éventuelles (par exemple 5, 6) agencées en aval de ladite cage de laminoir (par exemple 4) s'effectuent de telle sorte que pour chacune de ces cages de laminoir (par exemple 5, 6) le quotient de sa valeur de consigne momentanée de l'épaisseur (par exemple a5*, a6*) et de son épaisseur d'entrée de consigne momentanée (par exemple e5*, e6*) est une constante.
  2. Procédé de laminage selon la revendication 1, caractérisé en ce que la valeur de consigne de l'épaisseur (par exemple a4*) de l'une des cages de laminoir (par exemple 4) est modifiée en forme de rampe pendant le laminage de la zone de transition (7') de la bande (7).
  3. Procédé de laminage selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce qu'en aval de l'une des cages de laminoir (par exemple 5) est agencée au moins une cage de laminoir (par exemple 6).
  4. Procédé de laminage selon la revendication 3, caractérisé en ce que ladite une cage de laminoir (1) est la première cage de laminoir (1) du train de laminoirs.
  5. Procédé de laminage selon l'une des revendications 1 à 4, caractérisé en ce qu'on l'applique à un laminoir de laminage à chaud.
  6. Procédé de laminage selon l'une des revendications 1 à 4, caractérisé en ce qu'on l'applique à un laminoir de laminage à froid.
EP99102576A 1998-02-14 1999-02-11 Procédé de laminage pour une bande, en particulier une bande métallique Expired - Lifetime EP0936002B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19806161A DE19806161A1 (de) 1998-02-14 1998-02-14 Walzverfahren für ein Band, insbesondere ein Metallband
DE19806161 1998-02-14

Publications (3)

Publication Number Publication Date
EP0936002A2 EP0936002A2 (fr) 1999-08-18
EP0936002A3 EP0936002A3 (fr) 2001-01-03
EP0936002B1 true EP0936002B1 (fr) 2003-10-22

Family

ID=7857778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99102576A Expired - Lifetime EP0936002B1 (fr) 1998-02-14 1999-02-11 Procédé de laminage pour une bande, en particulier une bande métallique

Country Status (5)

Country Link
US (1) US6035684A (fr)
EP (1) EP0936002B1 (fr)
AT (1) ATE252424T1 (fr)
DE (2) DE19806161A1 (fr)
ES (1) ES2210871T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19950609C2 (de) * 1999-10-21 2001-10-18 Bwg Bergwerk Walzwerk Verfahren zum Reduzieren der Schrottlänge beim Walzen von mittels Schweißnähten verbundener Metallbänder und Tandemstraße zur Durchführung des Verfahrens
US20090273135A1 (en) * 2008-05-05 2009-11-05 Bowe Bell + Howell Scanners L.L.C. Feeder system with independent control of rollers
JP6628049B2 (ja) * 2017-04-07 2020-01-08 Ｊｆｅスチール株式会社 タンデム圧延機における走間板厚変更方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936548B1 (fr) * 1970-03-16 1974-10-01
US3807206A (en) * 1972-09-29 1974-04-30 J Connors Strip gage change during rolling in a tanden rolling mill
JPS5561306A (en) * 1978-11-01 1980-05-09 Mitsubishi Electric Corp Changing system for rolling schedule while running rolling stand
JPS5666315A (en) * 1979-10-31 1981-06-04 Sumitomo Metal Ind Ltd Controlling method for sheet thickness in strip mill
JPS60148621A (ja) * 1984-01-13 1985-08-05 Kawasaki Steel Corp タンデム圧延機の走間板厚変更方法
JPH05200420A (ja) * 1992-01-28 1993-08-10 Toshiba Corp マットロール圧延用板厚制御装置
DE19505694C1 (de) * 1995-02-20 1996-07-04 Siemens Ag Einrichtung zur Dickenregelung von Walzgut
KR100241167B1 (ko) * 1995-04-18 2000-03-02 에모토 간지 연속열간압연에 있어서의 강편접합부의 압연방법

Also Published As

Publication number Publication date
EP0936002A3 (fr) 2001-01-03
DE19806161A1 (de) 1999-08-19
ATE252424T1 (de) 2003-11-15
US6035684A (en) 2000-03-14
EP0936002A2 (fr) 1999-08-18
ES2210871T3 (es) 2004-07-01
DE59907404D1 (de) 2003-11-27

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