EP1020240B1 - Procédé de régulation des tractions/compressions dans un laminoir multicage à chaud et système de commande correspondant - Google Patents

Procédé de régulation des tractions/compressions dans un laminoir multicage à chaud et système de commande correspondant Download PDF

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Publication number
EP1020240B1
EP1020240B1 EP00400038A EP00400038A EP1020240B1 EP 1020240 B1 EP1020240 B1 EP 1020240B1 EP 00400038 A EP00400038 A EP 00400038A EP 00400038 A EP00400038 A EP 00400038A EP 1020240 B1 EP1020240 B1 EP 1020240B1
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EP
European Patent Office
Prior art keywords
torque
frame
cage
product
speed
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
EP00400038A
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German (de)
English (en)
French (fr)
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EP1020240A1 (fr
Inventor
Joseph Schwedt
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.)
Alstom SA
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Alstom SA
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Publication date
Application filed by Alstom SA filed Critical Alstom SA
Publication of EP1020240A1 publication Critical patent/EP1020240A1/fr
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    • 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
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque

Definitions

  • the invention essentially relates to a control method for a multi-layer rolling mill hot and in particular for a multi-layer rolling mill without force sensors. This process is more particularly intended to eliminate the parasitic constraints of tension / compression to which a product, such as bar, sheet or profile, is subjected metallic, during rolling.
  • ⁇ E ⁇ ( ve not - V Sn -1 ) dt
  • ⁇ E ⁇ ( ve not - V Sn -1 ) dt
  • a variation in hardness in a product, at the entrance of a cage n-1, causes a variation in section at the outlet of this cage and a variation in the downstream slip, which leads to a change in the metal flow rate at the outlet of the cage.
  • Multicage rolling mills which include means for controlling pull-ups in the different intercages by individual regulation of the rolling torque / force ratio rolling cage by cage.
  • This regulation involves the presence of sensors and in particular rolling force sensors which are expensive, difficult to install and to maintain, and which potentially constitute sources of breakdowns.
  • this solution requiring the presence of sensors, is not always applicable, in particular in the case of rolling mills with bars or beams where such sensors are rarely installed.
  • the invention therefore provides a method for estimating and regulating pull-ups / compressions in a multicage rolling mill working with metal products hot.
  • a permanent update of the estimate of the traction torque and torque rolling at zero tension is carried out for each cage and the estimation of the pulls intercages allows regulation of these at predefined levels in a rolling scheme. This makes it possible to target a rolling with intercage pulls minimum, as recommended by many rolling mill operators.
  • ⁇ C T, i corresponds, according to its sign, to the variation in tensile or compression stress for the cage of rank i among the n cages of the train, where R i and r i are the working radius and the reduction ratio for the cage of row i
  • S 0 corresponds to the sum of the variations of the measured resistive torque ( ⁇ C i ) brought back to the level of the mechanics ( ⁇ C i .r i ) and divided by the lever arm ( ⁇ C i , r i / R i ), ⁇ C i being the variation of the resisting torque Ci with respect to the reference torque memorized for the cage of row i, with ⁇
  • the invention also provides a control system for a multilayer rolling mill, working hot metal products, the cages of which are controlled by command, with programmed logic, placed under the control of at least one control unit joint supervision, characterized in that it includes material means and software for ensuring the implementation of the method as defined above.
  • the single figure shows a block diagram of a multi-layer rolling mill.
  • the rolling mill shown diagrammatically in the single figure is assumed to be a hot rolling mill for processing metal products B. It is for example a wire, profile or bar train, or even a strip or plate train.
  • This train is conventionally composed of a plurality of successive cages 1 represented by a train entry cage 1 1 and a train exit cage 1 n between which are two of the intermediate cages 1 2 and 1 i , these cages being symbolized by their respective pairs of cylinders.
  • control unit 2 such as the units 2 1 , 2 2 , 2 i and 2 n .
  • These units are themselves included in a control system where they are under the control of at least one supervision unit 3.
  • the control and supervision units are here assumed to be of programmed logic type and organized around processors with which they are associated various memories and specialized interfaces, in particular for controlling the cages and for the operation of the rolling mill by operating personnel.
  • the respective structure and functions of these constituent elements combining hardware and software means which are well known to those skilled in the art, are developed here only for the parts which have a direct relationship with the subject of the invention.
  • the object of the process according to the invention is to eliminate in a coordinated manner the parasitic stresses of traction / compression by action at level of the rolling mill cage motors, taking the torques as a reference developed by the various cages with a view to obtaining a state known as minimum traction at level of the rolled product when this product passes through each of the cages.
  • the minimal traction control on a continuous train has a double interest, it allows maintain a constant minimum stress at the level of the product which improves the quality, it also makes it possible to reduce the adjustment phases of the cages and therefore to avoid downgrades of the first products. It must be performed both at product engagement in a cage only along the entire length of the product.
  • the minimum traction control at engagement is here based on the use of a torque memory device which assumes known the value of the rolling torque C L.
  • Filtering carried out on the torque reference allows phasing of the torque and speed to improve the determination of the rolling torque.
  • torque memory device An example of a torque memory device is described here in relation to the two first cages of the train shown schematically in the single figure. This device acts from of an initial situation where the motors of these two cages are speed regulated, this regulation being carried out in a conventional manner, for example using a dimmer SYCONUM type speed of the applicant.
  • a measurement of the rolling torque of the cage 1 1 is carried out just before the engagement in the cage 1 2 of a product being rolled in the cage 1 1 . There is then no traction or compression upstream or downstream of the cage 1 1 . The torque value thus determined is then stored as the initial reference value for the later rolling period.
  • the motor of the cage 11 is switched from speed regulation to torque regulation.
  • the latter regulated in speed, then acts as a pilot cage with respect to the cage 1 1 which adapts in speed so as to keep its torque equal to its reference torque.
  • Detection of the presence of a product in a cage is indicated by the presence of a signal called caged product.
  • This signal is generated in the variable speed drive of a cage, on the one hand, in the absence of speed transient, when the rolling torque instantaneous is greater than a fixed threshold value or possibly established as a function of the product to be laminated, and, on the other hand, when the instantaneous rolling torque is greater than a threshold for a determined time, while a speed transient is in Classes.
  • the synchronization thus achieved between the two cages ensures an absence of stress in the interleaving, after a transient phenomenon due to mechanical inertia. It is obtained by taking into account classically measured electrical parameters at the level of the power supplies for the cage motors. This therefore avoids the problems of implementation and stability conventionally linked to sensors, when these are present.
  • the device has a high sensitivity since variations in traction that occur downstream of a cage, result in large variations in the rolling torque at this cage.
  • the use of the torque memory device in the engagement phase is not preferably not kept in this form for the rest of the rolling operation so as to avoid any variation in torque being considered as intercage traction variation.
  • the regulated traction level generally corresponds to a level close to zero or non-traction but it can also correspond to any other level wish
  • This device is to control the flow of the train in line with each cage during the product engagement and overall acceleration phases of the train, it is intended to ensure consistency in the ratio of the speeds of rotation of two successive cages, such 1 i and 1 i + 1 , by action on that of these cages which is upstream of the other.
  • the speed ratio control device stores, as a reference value, the rotation speed ratio ( ⁇ i-1 / ⁇ i ) 0 for the cages 1 i-1 and 1 i , when the stand 1 i is switched to torque control, just before the product being rolled arrives at the entry of the stand 1 i + 1 so that this reference value can be used later, during the rolling.
  • the cage 1 i self-adapts in speed to the engagement of the product being rolled in the cage 1 i + 1 thanks to the torque regulation and it triggers a correction of the speed of the cage 1 i-1 , located upstream, worth
  • the first of the two components corresponds to the torque to be supplied by the engine of a cage in the absence of traction or compression upstream and downstream of the cage.
  • the second of these components has the effect of increasing or decreasing the torque to be supplied by the cage motor considered, as the case may be.
  • ⁇ VS 1 ⁇ VS The 0.1 - T 1.
  • R 1 r 1 ⁇ VS ⁇ VS The , 0, - T .R r + T 1.
  • R r ⁇ VS ⁇ VS The , 0, - T .R r + ⁇ T -1.
  • R r ⁇ VS not ⁇ VS L, 0, n + T not -1.
  • R not r not
  • the tensile and / or compression forces between intersections T i can be determined from the relationships defined above.
  • control system used is a fully digital system where all the intercage pulls are periodically calculated at the sampling period of the system.
  • C mem, i (n) is the stored torque of cage i at time nT
  • a characteristic of the invention is to constantly update the stored reference torque C mem, i which in fact represents the rolling torque at zero traction of the cage i as it evolves during rolling.
  • the intercage traction torques are therefore regulated and there is however no regulation at the level of the total resistant torques of the cages.
  • a defect such as a variation of hardness where a dimensional variation of product, resulting in a resistant torque step when this fault is in a cage will lead the control implementing the method according to the invention to tend to cancel the variations in tensile / compression stresses that will appear inevitably due to the changes in the section of the product leaving the cage and downstream sliding at this cage. Cascade corrections are thus made from cage to cage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of Eletrric Generators (AREA)
  • Laminated Bodies (AREA)
  • Feedback Control In General (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Production Of Multi-Layered Print Wiring Board (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Tunnel Furnaces (AREA)
EP00400038A 1999-01-11 2000-01-10 Procédé de régulation des tractions/compressions dans un laminoir multicage à chaud et système de commande correspondant Expired - Lifetime EP1020240B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9900181A FR2788233B1 (fr) 1999-01-11 1999-01-11 Procede de regulation des tractions/compressions dans un laminoir multicage a chaud et systeme de commande correspondant
FR9900181 1999-01-11

Publications (2)

Publication Number Publication Date
EP1020240A1 EP1020240A1 (fr) 2000-07-19
EP1020240B1 true EP1020240B1 (fr) 2003-03-12

Family

ID=9540741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00400038A Expired - Lifetime EP1020240B1 (fr) 1999-01-11 2000-01-10 Procédé de régulation des tractions/compressions dans un laminoir multicage à chaud et système de commande correspondant

Country Status (14)

Country Link
US (1) US6205829B1 (pt)
EP (1) EP1020240B1 (pt)
JP (1) JP2000202513A (pt)
KR (1) KR20000053431A (pt)
CN (1) CN1260251A (pt)
AT (1) ATE234166T1 (pt)
BR (1) BR0000530A (pt)
DE (1) DE60001589T2 (pt)
DK (1) DK1020240T3 (pt)
ES (1) ES2193922T3 (pt)
FR (1) FR2788233B1 (pt)
ID (1) ID24145A (pt)
PT (1) PT1020240E (pt)
TW (1) TW524724B (pt)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2853570B1 (fr) * 2003-04-11 2005-07-01 Vai Clecim Procede et dispositif de regulation de l'epaisseur d'un produit lamine
DE102006048427B3 (de) * 2006-10-12 2008-05-21 Siemens Ag Walzanlage, nachgerüstete Walzanlage, Walzwerk oder Walzstraße, Verfahren zum Ansteuern einer Walzanlage und Verwendung eines ersten Gerüsts einer Walzanlage
US20100206033A1 (en) * 2007-05-01 2010-08-19 Toshiba Mitsubishi-Electric Industrial Systems Corporation Driving device of motors for rolling rolls
US8893537B2 (en) * 2007-11-07 2014-11-25 The Bradbury Company, Inc. Methods and apparatus to drive material conditioning machines
CN101480665B (zh) * 2009-01-20 2012-12-26 张明 张力-板形测量-调整仪
RU2446026C2 (ru) * 2010-06-21 2012-03-27 Открытое акционерное общество "Магнитогорский металлургический комбинат" Способ автоматического регулирования натяжения полосы в межклетевом промежутке широкополосного стана горячей прокатки
AU2011311892B2 (en) 2010-10-06 2016-03-17 The Bradbury Company, Inc. Apparatus and methods to increase the efficiency of roll-forming and leveling systems
CN103962391B (zh) * 2013-01-29 2017-02-08 宝山钢铁股份有限公司 一种热连轧机精轧机组的轧制负荷优化方法
CN105013832A (zh) * 2014-04-28 2015-11-04 宝山钢铁股份有限公司 一种兼顾轧制能耗与良好板形的热轧带钢负荷分配方法
CN104001728A (zh) * 2014-06-12 2014-08-27 鞍钢股份有限公司 一种除磷箱风动挡水板的控制方法
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
RU2643157C1 (ru) * 2016-08-08 2018-01-31 Евгений Евгеньевич Диденко Способ управления электроприводом петледержателя при заправке полосы в клети чистовой группы стана горячей прокатки
IT201700107113A1 (it) * 2017-09-25 2019-03-25 Danieli Off Mecc Procedimento di regolazione del tiro di una barra e relativo dispositivo
CN111634108B (zh) * 2020-04-25 2020-12-08 湖南省美程陶瓷科技有限公司 一种磁控管陶瓷金属化涂浆系统及装置
CN112453056B (zh) * 2020-10-22 2021-08-03 北京科技大学 一种基于传动辊微转矩的辊道粘铝控制方法

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Publication number Priority date Publication date Assignee Title
GB1163274A (en) * 1965-12-28 1969-09-04 British Iron Steel Research Improvements in and relating to Rolling Mills
FR2354154A1 (fr) * 1976-06-11 1978-01-06 Jeumont Schneider Procede pour le laminage sans contrainte de metaux et dispositif pour la mise en oeuvre de ce procede
FR2483268A1 (fr) * 1980-05-28 1981-12-04 Jeumont Schneider Procede et dispositif pour le laminage sans ccontrainte de metaux
JPS57100812A (en) * 1980-12-15 1982-06-23 Nippon Kokan Kk <Nkk> Roll positioning controlling method for rolling mill
JPS57137015A (en) * 1981-02-17 1982-08-24 Toshiba Corp Tension controlling method in hot tandem rolling mill
JPS60166112A (ja) * 1984-02-10 1985-08-29 Sumitomo Metal Ind Ltd タンデムミルの電流荷重配分制御装置
JPS6462205A (en) * 1987-09-03 1989-03-08 Kawasaki Steel Co Control method for rolling mill in continuous rolling of metal stock
DE4325074C2 (de) * 1992-10-23 1995-06-29 Elpro Ag Verfahren zur Regelung der Walzgutgeschwindigkeit in einer mehrgerüstigen kontinuierlichen Warmwalzstraße zur Gewährleistung minimaler Längszugkräfte

Also Published As

Publication number Publication date
BR0000530A (pt) 2000-10-17
TW524724B (en) 2003-03-21
DE60001589T2 (de) 2004-04-08
PT1020240E (pt) 2003-07-31
KR20000053431A (ko) 2000-08-25
ATE234166T1 (de) 2003-03-15
JP2000202513A (ja) 2000-07-25
DE60001589D1 (de) 2003-04-17
DK1020240T3 (da) 2003-07-14
ID24145A (id) 2000-07-13
FR2788233B1 (fr) 2001-02-23
ES2193922T3 (es) 2003-11-16
FR2788233A1 (fr) 2000-07-13
US6205829B1 (en) 2001-03-27
CN1260251A (zh) 2000-07-19
EP1020240A1 (fr) 2000-07-19

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