EP1747074A1 - Procede de laminage d'un produit a laminer presentant une zone de transition - Google Patents

Procede de laminage d'un produit a laminer presentant une zone de transition

Info

Publication number
EP1747074A1
EP1747074A1 EP05742976A EP05742976A EP1747074A1 EP 1747074 A1 EP1747074 A1 EP 1747074A1 EP 05742976 A EP05742976 A EP 05742976A EP 05742976 A EP05742976 A EP 05742976A EP 1747074 A1 EP1747074 A1 EP 1747074A1
Authority
EP
European Patent Office
Prior art keywords
rolling
roll
rolling stock
transition region
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.)
Withdrawn
Application number
EP05742976A
Other languages
German (de)
English (en)
Inventor
Hans-Joachim Felkl
Martin Niemann
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1747074A1 publication Critical patent/EP1747074A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B21B37/58—Roll-force control; Roll-gap control
    • 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
    • B21B1/16—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/18—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 wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
    • 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
    • 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
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet
    • 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
    • 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
    • B21B37/52—Tension control; Compression control by drive motor control

Definitions

  • the invention relates to a method for rolling a rolling stock in a rolling train which has at least two roll stands, each with a roll gap, the rolling stock to be rolled having at least one transition region.
  • the invention also relates to a computing device for corresponding control of a rolling mill.
  • the rolling stock has a number of subareas which can differ in terms of different / dimensions and / or different material properties (including temperatures).
  • Two successive sections of the rolling stock are connected to one another by means of a transition area.
  • the multiple sections of a rolling stock are created, for example, by delivering metal bundles individually and welding them together before rolling.
  • the sections of the rolling stock correspond to individual coils.
  • the rolling stock is usually divided into individual bundles again.
  • the object of the invention is to avoid the disadvantages known from the prior art and to provide a method by means of which a rolling stock with at least one transition region can be reliably rolled, even if in some cases considerable differences exist between partial regions of the rolling stock connected by means of a transition region regarding the dimensions and / or properties of the rolling stock.
  • This object is achieved by a method of the type mentioned at the outset, wherein the roll gap of at least one roll stand is opened as a function of the position of the transition region of the rolling stock moving at a speed through the rolling train, if the nature of the transition region so requests.
  • the object is further achieved by a corresponding computing device for regulating the rolling mill.
  • the invention makes it possible to roll rolled material reliably even if successive partial areas of the rolled material differ considerably in, for example, strip thickness, strip hardness and / or alloy. According to the invention, it is no longer absolutely necessary for a rolling stock to be composed of partial areas, ie individual coils or individual strips, in a long-term planning process in such a way that the differences between successive strips are only relatively small. For example, according to the invention, it is possible, in the case of short-term production dates, to produce rolled material from coils or strips, regardless of the To put together shafts or dimensions of the individual bundles or strips and to reliably roll the rolling stock continuously. This results in a significant increase in plant flexibility and safety.
  • the roll gap of at least one roll stand is only opened at a critical transition area, i.e. if the nature of the transition area requires it.
  • Critical transition areas are transition areas that connect partial areas of a rolling stock with such different properties or dimensions that their passage through a roll stand with the roll gap closed would result in considerable disruptions to the process variables. If a transition area is critical, its nature requires the opening of a roll gap. This also applies to the subsequent developments of the invention. According to the invention, stopping the system before entering a critical transition area is avoided, as a result of which the throughput is increased.
  • the roll gap of a roll stand is opened at the latest when the critical transition region of the rolling stock reaches this roll stand.
  • the strip tension in the rolling stock before and after this roll stand is advantageously compensated in order to ensure that the rolling process on the involved roll set up, that is to say as little as possible, in particular on this roll stand and the surrounding roll stands.
  • the rotational speed of at least one of the rolls, in particular the work rolls, of the roll stand is advantageously adapted to the speed of the rolling stock. This controlled closing of the roll gap with speed synchronization largely prevents undesired damage to the roll surface.
  • the speed of the rolling stock is advantageously measured. This increases the accuracy of the synchronization.
  • the speed of the rolling stock is advantageously determined with the aid of at least one model. This provides a particularly efficient method for determining speed.
  • the take-off in a rolling stand is advantageously regulated in a time-optimal manner with regard to the position of the transition area in the rolling mill.
  • the decrease in a roll stand is reduced when the transition area is approached.
  • the change in advance is compensated for by the speed of the rolls of the roll stand.
  • the roll gap is advantageously relieved before the transition of a transition area by controlled opening of the position.
  • the relationship speeds of the other drives of the rolling mill are preferably tracked. This prevents a disturbance in the process variables.
  • the tape tension in the rolling stock in front of a rolling stand on the rotational speed of the other roller drives Gere ⁇ gel is as long as the loss is reduced in this rolling mill to the critical transition region.
  • FIG. 1 shows a rolling train 10 for rolling a rolling stock 1 which moves through the rolling train 10 at a speed v.
  • the rolling mill 10 has at least two rolling stands 2 through which the rolling stock 1 passes.
  • the rolling stock 1 passes through the rolling train 10 in the strip running direction x.
  • a rolling stock 1, preferably a metal strip, is continuously rolled in the rolling mill 10.
  • the rolling mill 10 is preferably a cold rolling mill for steel with generally more than three roll stands 2.
  • the roll stands 2 are followed by a reel device 3 on which the rolled material 2 is wound.
  • the rolling mill 10, in particular the stands 2 of the rolling mill 10, are coupled to a computing device 4.
  • a computing device 4 In the rolling mill 10 there are sensors which are not shown in the drawing and which, for example, give measurement signals to the computing device 4.
  • the computing device 4 is preferably before ⁇ control signals to actuators in the rolling mill 10th
  • the computing device 4 preferably has a model 12, which models processes in the rolling mill 10 with the aid of data relating, for example, to the rolling stock 1.
  • the rolling stands 2 each have one
  • a roll stand 2 has at least two work rolls, at least one of which is arranged above the rolling stock 1 in the strip thickness direction y and at least one below the rolling stock 1 in the strip thickness direction y.
  • the nip 11 is located between these work rolls.
  • support rolls (not shown in detail in the drawing) are generally also provided.
  • rolling stock 1 for example sheet metal
  • continuous rolling trains 10 The bundles, which are usually delivered individually, are welded to one another in the inlet of the production system, of which the rolling mill 10 is also a component.
  • the rolling mill 10 rolls the rolling stock 1 consisting of several welded coils continuously, ie without stopping.
  • the rolling stock is split into bundles again. This is done, for example, by shearing or cutting.
  • rolling stock 1 is rolled in a continuous rolling train 10 regardless of the properties of the individual bundles which form the rolling stock 1.
  • FIG. 2 shows a section of a rolling stock 1 with two partial areas 1 a, 1 b, which correspond to two different coils and differ in terms of their thickness.
  • the two partial areas 1 a, 1 b of the rolling stock 1 are connected to one another by a transition area 9, the transition area 9 having a weld seam 5.
  • FIG. 3 shows a section of a rolling stock 1 with two partial areas 1 a, 1 b, each of which corresponds to different bundles.
  • the two sub-regions la, lb are connected to one another by a transition region 9, the transition region 9 having a weld seam 5.
  • the weld seam 5 is only indicated in FIG. 3 as in FIG. 2.
  • the sub-regions la, lb or bundles shown in FIG. 3 differ from one another in terms of their width.
  • FIG. 4 shows a section of a rolling stock 1, here two sub-areas la, lb being connected by a transition area 9 between two sub-areas la, lb, which preferably correspond to two coils.
  • the transition region 9 is shown in FIG. 4 as an example almost as a wedge. In many cases, the transition region 9 has a different thickness profile than the one shown.
  • the thickness of the rolling stock 1 in the transition region 9 can also first increase and then decrease. The foregoing applies analogously to the width of the rolling stock 1.
  • Properties such as strip thickness, strip width, strip hardness and / or alloy change at a transition region 9. If the rolling stock is put together regardless of the properties of the bundles or later partial areas, the properties of the rolling stock 1 can change suddenly, particularly at the weld seams 5.
  • FIG. 5 shows, by way of example, a transition region 9 designed as a wedge 6 between two roll stands 2 and 2 ⁇ .
  • the roll stand 2 ⁇ is arranged upstream of the roll stand 2 ⁇ .
  • the Roll stand 2 ⁇ has an upper work roll 7 ⁇ and a lower work roll 8 ⁇ .
  • the roll stand 2 an upper work roll 7 ⁇ and a lower work roll 8 , ⁇ .
  • ⁇ of a roll stand 2 ⁇ or 2 ⁇ is the roll gap 11 ⁇ or 11 ⁇ ⁇ .
  • the partial areas la, lb of the rolling stock 1 have, on the one hand, a strip thickness difference which was already present before entering the first rolling stand 2.
  • the strip thickness of the rolling stock 1 also changes when it passes through a roll stand 2 ⁇ , 2 ⁇ with a closed nip 11 11 x .
  • the portion lb of the rolling stock 1 a strip thickness hl front of the roll stand 2 ⁇ , which is greater than its thickness h2 tape after the rolling stand.
  • the strip thickness h3 in front of the roll stand 2 ⁇ is greater than the strip thickness h4 after the roll stand 2 ⁇ ⁇ .
  • the difference between the strip thicknesses hl and h.2 or h3 and h4 is due to the decrease in the roll stands 2 2 ⁇ ⁇ .
  • both the at least one upper and the at least one lower work roll 7 ⁇ , 7 , ⁇ or 8 ⁇ , 8 ⁇ of a roll stand 2, 2 2 ⁇ have contact with the rolling stock 1 or exert a rolling force on the rolling stock 1 ,
  • the roll gap 11, 11, 11 ⁇ of a roll stand 2, 2 ⁇ , 2 , ⁇ is open when in a roll stand 2, 2, 2 ⁇ ⁇ at least on one side of the rolling stock 1 in the strip thickness direction y, in particular on the top of the rolling stock 1 ,
  • the rolling stock 1 does not contact the at least one work roll 1 ⁇ , 7 , ⁇ or 8, 8 , in particular the at least one upper work roll 7 ⁇ , 7 ⁇ .
  • the rolling stock 1 sometimes has one or more transition areas 9, the properties of which It means that passing through such a transition region 9 through a roll stand 2 with a closed roll gap 11 would lead to considerable disturbances in the process variables.
  • Such a critical nature of the transition region 9 exists if the partial regions 1a, 1b of a rolling stock 1 connected by the transition region 9 differ significantly in at least one of their properties and / or at least one dimension.
  • Such a critical transition area 9 entails a considerable risk of the rolling stock 1 running through a closed roll gap 11.
  • the roll gap 11 of a roll stand 2 is therefore opened depending on the position of such a transition area 9. If a transition region 9 of a rolling stock 1 moves at a speed v through the rolling train 10, the roll gap 11 of a rolling stand 2 is opened if the nature of this transition region 9 requires it.
  • a critical transition area 9 passes through the rolling stands 2 of the rolling mill 10 one after the other.
  • the computing device 4 controls the rolling mill 10 in such a way that the rolling gaps 11 of the rolling stands 2 open in a stand and parallel to the position of the critical transition area when the rolling stock 1 is moving become.
  • a roll gap 11 ⁇ of a roll stand 2 ⁇ ⁇ is opened at the latest when the critical transition region 9 reaches this roll stand 2 ⁇ .
  • the aluminum gap 11 of a roll stand 2 is preferably only opened shortly before a critical transition area 9 runs into this roll stand 2 and it is closed after the critical transition area 9 has passed the roll stand 2.
  • a nip is preferably at most 11 opens the roll stands 2 or in particular • fully opened.
  • FIG. 6 schematically shows the course of the strip tension T over the strip running direction x in a rolling mill 10.
  • a reel device 3 is arranged at position x 5 .
  • the strip tension T in the rolling stock 1 drops after the first roll stand 2 at position xi in each roll stand 2 to the reel device 3.
  • the strip tension T in the rolling stock 1 before and after this rolling stand 2 is compensated for before the roll gap 11 of a rolling stand 2 is opened. That is, if the roll gap 11 ,, of a roll stand 2 is opened, then the strip tension T in the vicinity of this roll stand 2 runs shortly before, during and shortly after the roll gap 11 opens, ideally continuously.
  • the decrease in the take-off in a roll stand 2 is optimized in terms of time, with compensation for the change in advance to the roll speed.
  • the roll gap 11 is preferably relieved by controlled opening of the position in the roll stand 2 depending on
  • Transition in position or rolling force controlled mode of operation The relationship speed of the drives of the other roll stands 2 of the rolling train 10 are tracked. This prevents a disturbance in the process variables.
  • the relative speed is the speed in a roll stand 2 in relation to the other roll stands 2 of the rolling train 10. If a transition area 9 cannot be reliably rolled by controlled opening of the setting when the roll gap 11 is closed, the roll gap 11 is opened, as described above. If a roll gap 11 was opened because of a critical transition area 9, it will pass after passing through the critical transition area 9 controlled closed up to the tape contact.
  • the roller speed is synchronized with the measured and / or modeled speed v of the rolling stock 1.
  • Figure 7 shows two rolling stands 2 and ⁇ 2, ⁇ , wherein the roll stand 2 is ⁇ ⁇ ⁇ 2 of the rolling stand downstream.
  • Both roll stands 2 ⁇ and 2 ⁇ ⁇ have a device for rolling stand adjustment 2a or 2a ⁇ and a roll stand drive 2b or 2b ⁇ ⁇ .
  • a belt tension regulator 13 is provided.
  • the strip tension controller 13 is advantageously supplied with measured variables and / or values for the strip feed T in the rolling stock 1 between the two roll stands 2 and 2 ⁇ , determined with the aid of models.
  • An advantageous variant of the strip tension control according to the invention in the rolling stock 1 in front of the roll stand 2 ⁇ is described below.
  • the strip tension T is regulated via the back pressure of the roll stand 2 ⁇ ⁇ by means of the roll stand adjustment 2a ⁇ of the roll stand 2 ⁇ ⁇ .
  • the strip tension controller 13 adjusts the strip tension T by means of the rotational speed of the roll stand drive 2b of the roll stand 2 ⁇ .
  • the invention relates to a method for rolling a rolling stock 1 in a rolling train 10 with at least two rolling stands 2, each rolling stand 2 having a roll gap 11 and the rolling stock 1 to be rolled having at least one transition region 9. If a critical transition area 9 passes through the rolling train 10, the roll gaps 11 of the minimum At least two roll stands 2 are opened and closed in succession in the strip running direction x depending on the position of the transition region 9 moving at a speed v through the rolling train 10. The opening of the roll gaps 11 takes place parallel to the position of the critical transition area 9 when the rolling stock 1 is moving.
  • a transition area 9 is critical when its nature requires the opening of the rolling gap 11.
  • the changes in at least one of the dimensions or properties such as hardness or alloy of the rolling stock 1 in the vicinity of the transition region 9 could cause considerable disturbances to the process variables or a crack in the rolling stock 1 when the roll gap 11 is closed.
  • the stand-by-frame opening of the roll gaps 11 while the system is running also enables the controlled transition of a rolling stock 1 with extreme changes in dimension and / or hardness with a small dimension length.
  • a compensation of tensile forces prevents the rolls, in particular the work rolls 7 7 , ⁇ , 8 ⁇ , 8 , ⁇ of the roll stands 2 from slipping. There is then no compensation for the strip tension T in the neighboring stands when the roll gap old 11 in is opened a rolling stand 2.
  • the speed v of the rolling stock 1 is measured and / or determined with the aid of at least one model 12 implemented in the computing device 4. Placing the work rolls 7 7 , ⁇ , 8 ⁇ , 8 , ⁇ on the rolling stock 1 with a synchronized roll speed prevents damage to the rolls.
  • the optimal opening and closing of the roll gap 11 minimizes the dimension length.
  • the position of a transition area 9 in the rolling mill 10 is tracked by a synchronization point 8, which is preferably located at the entrance to the rolling mill 10, by means of differential speed monitoring.

Landscapes

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

Abstract

L'invention concerne un procédé de laminage d'un produit à laminer (1) dans un train de laminoir (10) comportant au moins deux structures de laminoir (2) présentant chacune une fente de laminoir (11), le produit à laminer (1) présentant au moins une zone de transition (9). Si une zone de transition critique (9) traverse le train de laminoir (10), les fentes de laminoir (11) des structures de laminoir (2) sont ouvertes et fermées consécutivement en fonction de la position de la zone de transition (9) se déplaçant à une vitesse (v) au travers du train de laminoir (10) dans le sens d'avancement de bande (x). L'ouverture des fentes de laminoir (11) est effectuée parallèlement à la position de la zone de transition critique (9) lorsque le produit à laminer (1) est déplacé. Une zone de transition (9) est critique lorsque sa texture nécessite l'ouverture des fentes de laminoir (11). Des variations d'au moins une des dimensions ou propriétés telles que dureté ou alliage du produit à laminer (1) dans l'environnement de la zone de transition (9) peuvent provoquer des perturbations notoires sur les grandeurs de processus, voire une fissure du produit à laminer (1), lorsque la fente de laminoir (11) est fermée. L'ouverture en fonction des structures des fentes de laminoir (11), lorsque le dispositif est en mouvement, permet d'obtenir une transition contrôlée d'un produit à laminer (1) avec des variations extrêmes des dimensions et/ou de la dureté, pour une longueur réduite.
EP05742976A 2004-05-06 2005-04-28 Procede de laminage d'un produit a laminer presentant une zone de transition Withdrawn EP1747074A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004022334A DE102004022334A1 (de) 2004-05-06 2004-05-06 Verfahren zum Walzen eines Walzgutes mit Übergangsbereich
PCT/EP2005/051943 WO2005107973A1 (fr) 2004-05-06 2005-04-28 Procede de laminage d'un produit a laminer presentant une zone de transition

Publications (1)

Publication Number Publication Date
EP1747074A1 true EP1747074A1 (fr) 2007-01-31

Family

ID=34967411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05742976A Withdrawn EP1747074A1 (fr) 2004-05-06 2005-04-28 Procede de laminage d'un produit a laminer presentant une zone de transition

Country Status (6)

Country Link
US (1) US20080060403A1 (fr)
EP (1) EP1747074A1 (fr)
CN (1) CN1980753A (fr)
DE (1) DE102004022334A1 (fr)
RU (1) RU2006143047A (fr)
WO (1) WO2005107973A1 (fr)

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DE102006011975A1 (de) * 2006-03-15 2007-09-27 Siemens Ag Betriebsverfahren für ein Walzwerk zum Walzen eines bandförmigen Walzguts
EP2135690A1 (fr) * 2008-06-19 2009-12-23 Siemens Aktiengesellschaft Train de laminage continental doté d'intégrations et/ou de détachements de cages de laminoir en fonctionnement continu
BRPI1013747B1 (pt) * 2009-05-06 2020-10-27 Primetals Technologies Germany Gmbh método para fabricar um estoque de laminação laminado em um trem laminador de uma usina de laminação e usina de laminação
CN101927267B (zh) * 2009-06-22 2012-07-04 宝山钢铁股份有限公司 一种精轧带钢辊缝的控制方法及装置
CN102431817A (zh) 2010-08-31 2012-05-02 海德堡印刷机械股份公司 输送装置
JP5737617B2 (ja) * 2011-04-01 2015-06-17 株式会社Ihi 電極帯板の連続圧縮装置と方法
US11919060B2 (en) * 2021-08-16 2024-03-05 The Bradbury Co., Inc. Methods and apparatus to control roll-forming processes

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Also Published As

Publication number Publication date
RU2006143047A (ru) 2008-06-20
WO2005107973A1 (fr) 2005-11-17
US20080060403A1 (en) 2008-03-13
CN1980753A (zh) 2007-06-13
DE102004022334A1 (de) 2005-12-01

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