EP2830788B1 - Procédé de laminage d'une bande de matériau - Google Patents

Procédé de laminage d'une bande de matériau Download PDF

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Publication number
EP2830788B1
EP2830788B1 EP13713773.3A EP13713773A EP2830788B1 EP 2830788 B1 EP2830788 B1 EP 2830788B1 EP 13713773 A EP13713773 A EP 13713773A EP 2830788 B1 EP2830788 B1 EP 2830788B1
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EP
European Patent Office
Prior art keywords
strip
band
width
rolling
tension
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
EP13713773.3A
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German (de)
English (en)
Other versions
EP2830788A1 (fr
Inventor
Rainer Burger
Daniel Kotzian
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 Germany GmbH
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Primetals Technologies Germany 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 Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to EP13713773.3A priority Critical patent/EP2830788B1/fr
Publication of EP2830788A1 publication Critical patent/EP2830788A1/fr
Application granted granted Critical
Publication of EP2830788B1 publication Critical patent/EP2830788B1/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
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • 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
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/02—Transverse dimensions
    • B21B2261/06—Width
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2265/00—Forming parameters
    • B21B2265/12—Rolling load or rolling pressure; roll force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed

Definitions

  • the invention relates to a method for rolling a material strip by means of a plurality of rolling mills arranged one behind the other and loop clamps arranged between the rolling mills.
  • JP 4 100620 A discloses a method for influencing the width of a metallic strip of material in a rolling train in which a strip tension in the strip of material is controlled in front of an input rolling stand.
  • the invention has for its object to provide an improved method for rolling a material strip in a rolling mill.
  • the material strip is transported through the rolling stands.
  • at least one width difference between an instantaneous width of the band end section and a current width of a band section of the material band adjacent to the band end section is determined continuously for at least one band end section of the material band.
  • width differences between Bandendabitesen and adjacent band sections are reduced by a corresponding change in the band tension in the Bandendabitesen.
  • This can advantageously counteracted a stepped width reduction in the end regions of the material strip and thus a more uniform width distribution along the material strip (more precisely: a uniform width distribution in a larger area of the material strip) can be achieved.
  • the method is particularly advantageous for use with rolling mills which do not have suitable upsetting devices by means of which the stepped width reduction in the end regions of the material strip can be compensated. Such rolling mills are mainly found in older hot rolling mills.
  • a current value of at least one influencing variable which influences a dependence of a width change of the band end section on the strip tension in a band end section during transport of the material strip is continuously recorded, and the strip tension in the tape end portion is set depending on the current value of this influence quantity.
  • a thickness of the band end portion and / or a temperature of the band end portion and / or a width of the material band are used.
  • the consideration of such influencing variables advantageously makes possible a more precise width correction which can be adapted to the respective circumstances in the band end sections of the material band.
  • the strip tension is set in at least one band end section on the basis of a band model which describes a dependence of a change in width of the material band of a Bandzug baseung.
  • the width of the material strip can be corrected in the Bandendabroughen controlled by the band model.
  • the method can be advantageously improved by improving the belt model and changes in the rolling train and / or the material band can be adjusted by appropriate changes of the belt model.
  • a band tension change corresponding to a determined width difference is preferably determined by means of the band model and the generated band tension is changed by a band tension control of the respective sling lifter by the determined Bandzug skilledung.
  • the band hoops are advantageously adjusted in such a way that they at least partially compensate the ascertained differences in width, since they cause band tension changes which compensate for these differences in width.
  • a current position of a band end portion is preferably continuously determined by continuously current speeds and rolling forces of all rolling mills and instantaneous Positions of all looper are recorded and evaluated.
  • a speed of a roll stand is understood here to be the angular speed of the rotation of work rolls of the roll stand.
  • FIG. 1 schematically shows a rolling mill 1 of a hot rolling mill with seven consecutively arranged rolling stands 2.1 to 2.7, wherein in interframe areas 9.1 to 9.6 between two adjacent rolling stands 2.1 to 2.7 per a loop lifter 3.1 to 3.6 is arranged.
  • a material strip 4 is processed by the rolling stands 2.1 to 2.7 (in FIG. 1 from left to right) and thereby changed by rolling in its width, thickness and length.
  • 4.1 designates a tape head of the material strip 4, ie the one end of the material strip 4, which is first moved into the rolling train 1.
  • 4.2 designates a belt foot of the material strip 4, ie the one end of the material strip 4, which is last driven into the rolling train 1.
  • Each rolling stand 2.1 to 2.7 has two superimposed work rolls 5, which are separated by a nip 6, through which the material strip 4 is guided.
  • Each loop lifter 3.1 to 3.6 has a lifting roller 7, which is rotatably mounted about a roller axis and is secured to a pivotable lifting arm 8. By pivoting the lifting arm 8, the lifting roller 7 can be pressed against an underside of the material strip 4, so that a band portion of the material strip 4 in the intermediate frame region 9.1 to 9.6, in which the loop lifter is arranged 3.1 to 3.6, and thereby in the band section a Bandzug ⁇ 1 to ⁇ 6 is generated.
  • the loop lifter 3.1 to 3.6 of the illustrated embodiment are thus formed as a rotary loop 3.1 to 3.6.
  • the specific embodiment of the loop lifter 3.1 to 3.6 is immaterial, ie the method according to the invention is analogously applicable for translational trained loop lifter 3.1 to 3.6.
  • the method according to the invention can be used, for example, both for electrically driven and for hydraulically driven loop lifters 3.1 to 3.6.
  • FIG. 2 Fig. 3 shows the effect of the loop lifter 3.i on a strip section extending between the roll nips 6 of the rolling stands 2.i and 2.i + 1.
  • the lifting arm 8 of the loop lifter 3.i is pivoted upwards by a pivoting angle ⁇ i from the horizontal, so that the lifting roller 7 of the loop lifter 3.i raises the band section.
  • the pivoting position of the lifting arm 8 defined by the pivot angle ⁇ i is referred to here as the position of the loop lifter 3.i.
  • the loop lifter 3.i generates a strip tension ⁇ i in the strip section, which has a width bi0 which the strip section has before entering the roll stand 2.i, in the roll gap 6 of the roll stand 2.i via a strip tension control (also called torque control) a width bi and in the nip 6 of the rolling mill 2.i + 1 reduced to a width bi + 1.
  • the section length of the strip section between the roll nips 6 of the rolling stands 2.i and 2.i + 1 is hereinafter referred to as LS (i, i + 1).
  • the thickness of the band section in the intermediate frame region 9.i is designated by hi.
  • the pivoting angle ⁇ i is a measure of the so-called strip stock in the intermediate frame region 9.i.
  • FIG. 3 shows the influence of a strip tension ⁇ 1 produced by the first loop lifter 3.1 on the width of the material strip 4 in a rolling process according to the prior art.
  • the first diagram in FIG. 3 shows the strip tension ⁇ 1 in the material strip 4 at a position of the rolling train 1 in the first intermediate frame region 9.1.
  • the first loop lifter 3.1 (more precisely: the lifting roller 7 of the first loop lifter 3.1) is first moved to the material strip 4 after the second rolling stand 2.2 is loaded, d. H. after the tape head 4.1 and an adjoining tape section of length s1 have passed through the nip 6 of the second rolling stand 2.2. Therefore, the strip tension ⁇ 1 only acts on the material strip 4 starting at a band coordinate s1.
  • the loop control regulates the pivot angle ⁇ 1 (or the corresponding strip supply) and the strip tension control regulates a constant strip tension ⁇ 1.
  • the second diagram of the FIG. 3 shows the width b0 of the material strip 4 at a position in front of the first rolling stand 2.1 as a function of the band coordinate s.
  • a material strip 4 is considered whose width and thickness before rolling in the rolling train 1 along the material strip 4 are constant. Therefore, the width b0 is constant along the material band 4.
  • the third diagram of the FIG. 3 shows the width b1 ( ⁇ 1) of the material strip 4 in the nip 6 of the first rolling stand 2.1 in dependence on the band coordinate s.
  • On this band section therefore acts in the nip 6 of the first stand 2.1 no strip tension ⁇ 1.
  • the strip tension ⁇ 1 acts on the material strip 4 in the nip 6 of the first rolling mill 2.1 only after the front strip section of length s2 has passed this nip 6, and until the first loop lifter 3.1 is lowered during the unthreading of the material strip 4. Therefore, the width b1 ( ⁇ 1) is reduced by the strip tension ⁇ 1 only from the band coordinate s2 and up to the band coordinate s6.
  • the fourth diagram of the FIG. 3 shows a solely by the strip tension ⁇ 1 resulting width b2 ( ⁇ 1) of the material strip 4 in the nip 6 of the second rolling stand 2.2 in dependence on the band coordinate s.
  • This width b2 ( ⁇ 1) is the width of the material band 4 as a function of the belt coordinate s, which would produce a rolling train 1 which has only the first two rolling stands 2.1 and 2.2 and the first loop lifter 3.1.
  • the strip tension ⁇ 1 acts on the material strip 4 from the point in time at which the front strip section of length s1 has passed this rolling gap 6 and until the first loop lifter 3.1 is lowered during the threading out of the material strip 4.
  • FIG. 4 shows the influence of a generated by the second loop lifter 3.2 strip tension ⁇ 2 on the width of the material strip 4 in a rolling process according to the prior art.
  • the first diagram in FIG. 4 shows the strip tension ⁇ 2 in the material strip 4 at a position of the rolling train 1 in the second intermediate frame region 9.2. Similar to the strip tension ⁇ 1, the strip tension ⁇ 2 also acts only from the strip coordinate s1 and up to a strip coordinate s6 ', which determines the distance d from the strip coordinate s7? of the belt foot 4.2 has, on the material strip 4, since the second loop lifter 3.2 is first moved to the material strip 4, after a front strip section of length s1 has passed the nip 6 of the third rolling mill 2.3, and is lowered before a strip section of length d at the end of the material band 4 has passed this nip 6.
  • the band coordinates s2 and s5 of FIG. 3 now correspond to band coordinates s2. and s5 ?.
  • Analog has the band section whose ends in FIG. 3 the band coordinates s5 and s6 now had ends with the band coordinates s5? and s6? and also a length of approximately LS (1,2) ⁇ h1 / h2.
  • the second diagram of the FIG. 4 shows the width b20 of the material strip 4 at a position in front of the second rolling stand 2.2 in dependence on the band coordinate s.
  • the width b20 corresponds to the width b2 ( ⁇ 1) in FIG. 3 taking into account the extension of the material strip 4.
  • the third diagram of the FIG. 4 shows the width b2 ( ⁇ 1, ⁇ 2) of the material strip 4 produced by the strip tension ⁇ 1 and ⁇ 2 in the roll gap 6 of the second roll stand 2.2 as a function of the strip coordinate s.
  • the strip tension ⁇ 2 acts on the material strip 4 in the nip 6 of the second rolling mill 2.2 only after the front strip section of length s3 has passed this nip 6, and until the second loop lifter 3.2 is lowered during the unthreading of the material strip 4. Therefore, the width b2 ( ⁇ 1, ⁇ 2) is reduced by the strip tension ⁇ 2 only from the band coordinate s3 and up to the band coordinate s6 ?.
  • the fourth diagram of the FIG. 4 shows a width b3 ( ⁇ 1, ⁇ 2) of the material strip 4 produced by the strip tension ⁇ 1 and ⁇ 2 in the roll gap 6 of the third roll stand 2.3 as a function of the strip coordinate s.
  • This width b3 ( ⁇ 1, ⁇ 2) is the width of the material band 4 as a function of the belt coordinate s, which would produce a rolling line 1 comprising only the first three rolling stands 2.1 to 2.3 and the first two loop lifters 3.1 and 3.2.
  • the strip tension ⁇ 2 acts on the material strip 4 from the time at which the front strip section of length s1 has passed this rolling gap 6, and until the second loop lifter 3.2 during the threading out of the material strip 4 is lowered.
  • a strip section of length d + LS (2, 3) at the end of the material strip 4 has not yet passed the roll gap 6 of the third rolling stand 2.3.
  • the strip tension ⁇ 2 in the nip 6 of the third rolling stand 2.3 reduces the width of the material strip 4 between the band coordinates s1 and s8 further with respect to the width b2 ( ⁇ 1, ⁇ 2) to the qualitatively in the fourth diagram of FIG. 4 shown width b3 ( ⁇ 1, ⁇ 2).
  • the other loop lifters 3.3 to 3.6 influence the width of the material strip 4 in the prior art rolling process.
  • the material band 4 After passing through the rolling train 1, the material band 4 has a stepped width in this method at its front end and at its rear end.
  • FIG. 5 shows the influence of a generated by the second loop lifter 3.2 strip tension ⁇ 2 on the width of the material strip 4 in a rolling process according to the invention. It is assumed that the first loop 3.1 as in FIG. 3 acts, ie that the first loop lifter 3.1 on the material strip 4, which initially has a constant width b0, between the band coordinates s1 and s6 a constant strip tension ⁇ 1 exerts.
  • the second diagram of the FIG. 5 shows the width b20 of the material strip 4 at a position in front of the second rolling stand 2.2 in dependence on the band coordinate s.
  • This width b20 runs along the material band 4 as in the second diagram of FIG. 4 because the strip tension ⁇ 1 as in FIG. 3 runs.
  • the strip tension change ⁇ 2 and the band coordinates s4 and s9 are selected such that they have a width difference ⁇ b20 between the width of the material band 4 in the band section between the band coordinates s3 and s2? and the width of the material band 4 in the band section between the band coordinates s2? and s5? eliminated.
  • the strip tension change ⁇ 2 also eliminates the width difference ⁇ b20 between the width of the material band 4 in the band section between the band coordinates s5? and s8? and the width of the material band 4 in the band section between the band coordinates s2? and s5 ?.
  • the tape tension change ⁇ 2 reduces the width differences between the widths in the tape sections between the tape coordinates s1 and s4, and s9 and s6, respectively. and the width in the band section between the band coordinates s2? and s5 ?. This is in the third and fourth diagrams of the FIG. 5 shown.
  • the strip tension ⁇ i is changed with i> 2 at the beginning and end of the material strip 4 in such a way that the strip tension ⁇ 1 Width differences produced along the material band 4 until ⁇ i-1 are reduced.
  • the strip tension changes ⁇ 1 to ⁇ 6 are determined as output values 0 by means of the belt model 11, which are then produced along the material strip 4 by the loop lifters 3.1 to 3.6 with the strip tension control.
  • sensitivities Si are used by the belt model 11, which describe a dependence ⁇ i / ⁇ b of a change in width ⁇ b of the material strip 4 from a strip tension change ⁇ i and for the rolling train 1 and the respective material strip 4 previously as a function of relevant factors such as temperature, width and thickness determined the material band 4 and stored, for example in the form of a corresponding characteristic field.
  • the corresponding strip tension change ⁇ i is then determined from a width difference ⁇ bi0 between instantaneous widths bi ( ⁇ 1,..., ⁇ i-1) of the material strip 4 of a band end section and a respective adjacent band section and transmitted to the strip tension control as an additional setpoint.
  • a width difference ⁇ bi0 between instantaneous widths bi ( ⁇ 1,..., ⁇ i-1) of the material strip 4 of a band end section and a respective adjacent band section and transmitted to the strip tension control as an additional setpoint.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (8)

  1. Procédé de laminage d'une bande de matériau (4) au moyen de plusieurs cages de laminage (2.1 à 2.7) disposées l'une derrière l'autre, et de releveur de boucles (3.1 à 3.6) disposés entre les cages de laminage (2.1 à 2.7), dans lequel
    - la bande de matériau (4) est transportée à travers les cages de laminage (2.1 à 2.7),
    caractérisé en ce que
    - pour au moins une section terminale de bande de la bande de matériau (4), pendant le transport de la bande de matériau (4), on détermine en continu au moins une différence de largeur (Δb10 à Δb60) entre une largeur instantanée (b0 à b6, b10 à b60) de la section terminale de bande et une largeur instantanée (b0 à b6, b10 à b60) d'une section de bande de la bande de matériau (4) voisine de la section terminale de bande,
    - et, quand la section terminale de bande se trouve en tout ou partie entre deux cages de laminage (2.1 à 2.7), on règle, au moyen d'un releveur de boucles (3.1 à 3.6) se trouvant à cet emplacement, une tension de bande (σ1 à σ6) dans la section terminale de bande en fonction d'une différence de largeur déterminée (Δb10 à Δb60), de telle sorte que cette différence de largeur (Δb10 à Δb60) soit réduite.
  2. Procédé selon la revendication 1, caractérisé en ce que, pendant le transport de la bande de matériau (4), on saisit en continu une valeur instantanée d'au moins une grandeur d'influence, qui influence une dépendance entre une modification de largeur d'une section terminale de bande et la tension de bande (σ1 à σ6) dans la section terminale de bande, et en ce que la tension de bande (σ1 à σ6) dans la section terminale de bande est réglée en fonction de la valeur instantanée de cette grandeur d'influence.
  3. Procédé selon la revendication 2, caractérisé en ce qu'en tant que grandeur d'influence on utilise une épaisseur (h1 à h6) de la section terminale de bande.
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce qu'en tant que grandeur d'influence on utilise une température de la section terminale de bande.
  5. Procédé selon l'une des revendications 2 à 4, caractérisé en ce qu'en tant que grandeur d'influence on utilise une largeur de la bande de matériau (4).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la tension de bande (σ1 à σ6) est réglée à l'aide d'un modèle de bande (11) dans au moins une section terminale de bande qui décrit une dépendance entre une modification de largeur de la bande de matériau (4) et une modification de tension de bande (Δσ1 à Δσ6).
  7. Procédé selon la revendication 6, caractérisé en ce qu'au moyen du modèle de bande (11) on définit une modification de tension de bande (Δσ1 à Δσ6) correspondant à une différence de largeur déterminée (Δb10 à Δb60), et en ce que la tension de bande respective élaborée (σ1 à σ6) est modifiée par l'intermédiaire d'une régulation de tension de bande du releveur de boucles respectif (3.1 à 3.6) pour la modification de tension de bande déterminée (Δσ1 à Δσ6).
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une position instantanée d'une section terminale de bande est déterminée en continu, en enregistrant et exploitant en continu les vitesses et pressions de laminage instantanées de toutes les cages de laminage (2.1 à 2.7) et les emplacements instantanés de tous les releveurs de boucles (3.1 à 3.6).
EP13713773.3A 2012-03-28 2013-03-19 Procédé de laminage d'une bande de matériau Active EP2830788B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13713773.3A EP2830788B1 (fr) 2012-03-28 2013-03-19 Procédé de laminage d'une bande de matériau

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12161767.4A EP2644289A1 (fr) 2012-03-28 2012-03-28 Procédé de laminage d'une bande de matériau
PCT/EP2013/055656 WO2013143914A1 (fr) 2012-03-28 2013-03-19 Procédé de laminage d'une bande de matériau
EP13713773.3A EP2830788B1 (fr) 2012-03-28 2013-03-19 Procédé de laminage d'une bande de matériau

Publications (2)

Publication Number Publication Date
EP2830788A1 EP2830788A1 (fr) 2015-02-04
EP2830788B1 true EP2830788B1 (fr) 2016-03-02

Family

ID=48045428

Family Applications (2)

Application Number Title Priority Date Filing Date
EP12161767.4A Withdrawn EP2644289A1 (fr) 2012-03-28 2012-03-28 Procédé de laminage d'une bande de matériau
EP13713773.3A Active EP2830788B1 (fr) 2012-03-28 2013-03-19 Procédé de laminage d'une bande de matériau

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP12161767.4A Withdrawn EP2644289A1 (fr) 2012-03-28 2012-03-28 Procédé de laminage d'une bande de matériau

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EP (2) EP2644289A1 (fr)
CN (1) CN104203439B (fr)
IN (1) IN2014KN01708A (fr)
WO (1) WO2013143914A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0636929B2 (ja) * 1986-07-02 1994-05-18 川崎製鉄株式会社 被圧延材の板幅制御方法
JPH01258807A (ja) * 1988-04-05 1989-10-16 Sumitomo Metal Ind Ltd タンデムミルにおける板幅制御方法
JPH01293914A (ja) * 1988-05-20 1989-11-27 Mitsubishi Electric Corp 圧延機制御装置
JPH04100620A (ja) * 1990-08-16 1992-04-02 Sumitomo Metal Ind Ltd 熱間連続圧延における板巾制御法
JP2000312909A (ja) * 1999-04-27 2000-11-14 Toshiba Corp 板幅制御装置
JP5587825B2 (ja) * 2011-05-11 2014-09-10 株式会社日立製作所 熱間圧延機の張力制御装置および制御方法

Also Published As

Publication number Publication date
CN104203439A (zh) 2014-12-10
IN2014KN01708A (fr) 2015-10-23
WO2013143914A1 (fr) 2013-10-03
CN104203439B (zh) 2017-04-05
EP2830788A1 (fr) 2015-02-04
EP2644289A1 (fr) 2013-10-02

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