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EP0662869B1 - Laminoir avec un dispositif de regulation de la vitesse de rotation des cylindres - Google Patents

Laminoir avec un dispositif de regulation de la vitesse de rotation des cylindres Download PDF

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Publication number
EP0662869B1
EP0662869B1 EP93918963A EP93918963A EP0662869B1 EP 0662869 B1 EP0662869 B1 EP 0662869B1 EP 93918963 A EP93918963 A EP 93918963A EP 93918963 A EP93918963 A EP 93918963A EP 0662869 B1 EP0662869 B1 EP 0662869B1
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EP
European Patent Office
Prior art keywords
loop
rolled material
stand
rolling mill
rotational 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.)
Revoked
Application number
EP93918963A
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German (de)
English (en)
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EP0662869A1 (fr
Inventor
Harald Bax
Herbert Polster
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
Siemens Corp
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Siemens AG
Siemens Corp
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Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0662869A1 publication Critical patent/EP0662869A1/fr
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Anticipated expiration legal-status Critical
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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
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control

Definitions

  • a rolling mill according to the preamble of claim 1 is known for example from JP-A-62-207509.
  • the present invention has for its object to provide a further rolling mill with a device for regulating the speeds of the rolls.
  • the loop height is expediently used as a measure of the length of the rolling stock between the rolls or for the loop extension.
  • the last stand of a rolling mill is advantageous, the initial stand, the guide stand, the speed of which determines the output speed of the rolling stock and should therefore be constant.
  • the stands in front of the loop in the rolling direction are then regulated.
  • A1, A2, A3 ... A6 are used to designate rolling stands in which a rolling stock coming from a furnace is formed.
  • the last roll stand A6 serves as a guide stand, the speed of which is predetermined according to the exit speed of the rolling stock.
  • the drives of the scaffolds are controlled so that setpoints from control modules RB1, RB2 ... RB6 are fed to them to set the speeds.
  • These can be program modules which each contain a minimum tension controller MZR1, MZR2 ... MZR6 and a loop controller SLR1, SLR2 ... SLR6 in the illustration according to FIG.
  • a central module ZB contains a material position tracking ABL, which determines the position of the rolling stock and communicates it to the controller blocks RB1 ...
  • the setpoint input supplies the control blocks RB1, RB2 ... RB6 with setpoint values which are corrected by the loop controllers SLR1 ... SLR5 or the minimum tension controllers MZR1 ... MZR5.
  • the minimum tension controller MZR6 and the loop controller SLR6 are ineffective in the controller module RB6, since the speed of the roll stand A6 is to be determined solely by the setpoint given by the setpoint specification SOL.
  • the rolling stock does not run straight between the stands A3, A4, A5 and A6, but it hangs or bulges, ie forms a loop between two roll stands.
  • Loop height transmitters S1, S2, S3 determine the heights of these loops and guide the loop heights accordingly Signals to the loop controllers SLR3, SLR4, SLR5. These set the speeds of the stands A3, A4, A5 so that the loop heights remain constant. It should be noted that the loop heights are normally kept constant by acting on the stand in front of the loop in the rolling direction.
  • the minimum tension controllers MZR3, MZR4, MZR5 are ineffective because the associated loop controllers are in operation.
  • the minimum tension controllers MZR1, MZR2 of the controller modules RB1, RB2, which are assigned to the first roll stands A1, A2 in the rolling direction, are released, but not the associated loop controllers SLR1, SLR2.
  • the last scaffold A6 serves as a guide scaffold
  • the loop regulators located in the single-core area then act in the direction of the outlet.
  • the exit stand that is the last stand in the single-core area, becomes the master stand for the relevant core, and the direction of action of the loop regulator working in this core is switched in the direction of the furnace. An increase in the exit speed caused by the pulling in of the loops is thereby avoided.
  • the position tracking unit ABL reports the rolling mill assignment of the minimum tension control MZR, the setpoint specification SOL and the loop controller SLR.
  • the output values of the last three units are summarized in a setpoint output SAS and passed on to the scaffold drive.
  • Figure 2 shows details of the structure and the connection of these five units.
  • the loop control SLR is transferred from the setpoint specification SOL the parameters required for the basic setting. This includes the operating setpoints for the loop heights or the current values for the working roll diameters and the gear ratios.
  • the input variables for the loop controller SLR are the loop height actual value and the loop height setpoint at inputs IW and SW.
  • the loop regulators are designed as PI regulators. However, fuzzy controllers or state controllers can also be used. Depending on the position of the rolling stock, the loop regulators are given different loop height setpoints or loop extension setpoints.
  • the loop height resulting from the tapping is adopted as the initial setpoint. Starting from this, the setpoint is increased to the operating setpoint with a predetermined slope.
  • the loop control SLR can also determine the time for switching to the operating setpoint from the road occupancy transferred by the material position tracking ABL.
  • the SLR loop control directly specifies the point in time at which a run-out setpoint value, which decreases continuously with a predetermined gradient, is entered for loosening the loops by the material position tracking.
  • loop extension Between the loop height and the lengthening of the rolling stock between two rolling stands caused by the loop, hereinafter referred to as loop extension, there is a non-linear relationship.
  • the actual value of the loop height and the setpoint are converted into a value for the loop extension and entered into the loop control via a characteristic curve with measured reference points or by conversion using a mathematical algorithm.
  • the actual value for the loop extension control or the length of the rolling stock that differs therefrom only by a constant additive size will be used between two roll stands.
  • Which of the two types of linearization is used depends on the rolling stock used, the geometric dimensions for the loop, such as loop height and loop length, the arrangement of guide rollers and the loop type, standing, lying or hanging.
  • the loop regulators preferably work with penetration, ie loop regulation also acts on the drives in front of them or on the controllers following in the direction of action of the loop regulators.
  • the output signals of the loop controller are each fed to the controller following in the effective direction via an input DU.
  • the signal supplied to the input DU is multiplied in a multiplier M by a factor indicating the speed ratio and supplied to an input VN.
  • the output signal of the multiplier MU is added in an adder AD to the output signals of the proportional part KP and the integral part TN and the sum signal is fed to the setpoint output.
  • the manipulated variable of a loop control is not effective as a disturbance for the loop control in front; this makes the rolling mill routing quieter.
  • the loop regulator can only be penetrated by the scaffolds that are engaged on the same rod as the scaffold directly influenced by the loop regulator.
  • the loop control receives the information required for this limitation of the penetration from the material position tracking ABL.
  • the rolling programs contain information about the active stands, drivers, roller tables, scissors, minimum tension controls and loop controls. They also contain the material speeds and drive speeds for the individual scaffolding and the loop height operating setpoints. Roll data records contain the working roll diameter, advance factors and, if necessary, gear ratios.
  • a set of speed ratios namely the ratios of the speeds of successive drives, is calculated and stored from a basic setpoint value set.
  • the speed ratios are optimized when passing through the rolling stock by means of the loop and minimum tension control or corrected by means of a handle.
  • the optimized speed ratios are given to the setpoint specification SOL at the time of the determination and are adopted by the latter in the stored set for the speed ratios. It is assumed that a speed ratio is then optimized when the sling or minimum tension control has reached the steady state.
  • the setpoint specification SOL therefore always has a set of the latest speed ratios, which contains all the corrections previously made by means of minimum tension controls, loop controls and manual adjustments.
  • the default setpoints for the individual drives are calculated on the basis of the speed of the guide stand and the currently stored speed ratios. Since there can be several bars in the street at the same time, a separate setpoint set is determined and saved for each bar when it enters the street. These setpoint sets remain valid until the associated member has left the street.
  • the setpoint specification SOL thus manages a complete set of setpoint values for all drives. It can e.g. B. ten setpoint sets, corresponding to ten bars, can be provided for 32 drives.
  • the setpoint specification SOL has an output memory for the currently setpoint values to be specified. Depending on the road occupancy, the corresponding values for the drives are selected from the setpoint memories for the bars, transferred to the output memory and sent to the SAS setpoint output.
  • FIG. 3 This is illustrated in FIG. 3 using an example of a rolling mill with eleven stands A1, A2 ... A11. Setpoints are stored for each of these roll stands; their entirety results in a basic setpoint set, which is illustrated in line a.
  • Two lines g show the road occupancy at a certain time.
  • a stick 4 is straight at the outlet of the scaffolding A11, which, for. B. is the scaffolding.
  • a rod 5 is located in the area of the stands A4, A5, A6, A7 and an incoming rod 6 is located in the area of the stands A1, A2.
  • the basic setpoint set has been optimized and the optimized values have been entered in a setpoint memory for bar 4.
  • the setpoint set for rod 4 is symbolized in line b.
  • lines c, d and e illustrate the setpoint memories for rod 5, rod 6 and the next incoming rod.
  • Line f shows the content of the output memory of the setpoint specification SOL.
  • the associated setpoints are taken from the setpoint memory for rod 4 (line b).
  • the stands A4, A5, A6, A7 in which rod 5 is located setpoints from the setpoint memory for rod 5 (line c) are entered. Since the entry is made in the bar space, the setpoint for bar 5 is also written into the output memory for frame A8 at the time shown.
  • the setpoints for rod 6 (row d) are entered in the output memory for the stands A1, A2, A3.
  • the associated areas for the target values also migrate through the output memory (line f).
  • Setpoints are sent from the setpoint specification each time the road is started or after the transfer of a new rolling program, as well as in gaps and after manual adjustments to the SAS setpoint output. At the same time, except for manual adjustments, the speed setpoints are transferred to the SLR loop control and the MZR minimum tension control.
  • the target value specification SOL determines the point in time for the target value specification in the template gap from the road occupancy transferred by the material position tracking ABL. By specifying the setpoint in The influence of active minimum tension controls and loop controls is avoided.
  • the equipment of the rolling stands, e.g. B. the gear ratios and the roller diameter can be changed. This also changes the path gain, which in turn must be taken into account in the controller parameter KP.
  • a standardization factor FKN is advantageously introduced, with which the control is adapted to the changed equipment, e.g. B. gear ratio and roller diameter is adjusted.
  • This automatic controller adjustment causes that when changing the route parameters, for. B. due to rolling program specifications, the optimal loop regulator setting is retained in all rolling programs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Adjustment And Processing Of Grains (AREA)

Claims (10)

  1. Laminoir destiné au laminage de produit en forme de bande ou de barre qui forme une bouche entre deux cages de laminoir, comportant un dispositif de régulation de la vitesse de rotation des cages de laminoir, le dispositif étant pourvu de moyens destinés à détecter la longueur du produit laminé formant la bouche ou la longueur du produit laminé entre les cages de laminoir en tant que valeur réelle, et d'un régulateur de boucle (SLR3, SLR4, SLR5) qui régule la vitesse de rotation d'une cage (A3, A4, A5) adjacente à la bouche de telle sorte que la valeur réelle soit égale à une valeur de consigne prescrite,
       caractérisé par le fait que,
       il est prévu une mémoire de valeurs de consigne dans laquelle sont mémorisées, lors du traitement d'un produit à laminer, les vitesses de rotation ou la vitesse de rotation de la cage directrice et les rapports des vitesses de rotation des cages de laminoir, qui sont prescrites en tant que valeurs de consigne lors de l'arrivée d'un nouveau produit à laminer, étant précisé qu'avant l'arrivée du nouveau produit à laminer dans le train du laminoir, les valeurs de consigne à prescrire pour les différents entraînements sont calculées à partir de la vitesse de rotation de la cage directrice et des rapports des vitesses de rotation instantanées mémorisées.
  2. Laminoir selon la revendication 1,
       caractérisé par le fait que,
       dans le cas d'un régulateur fonctionnant avec un paramètre, par exemple un coefficient d'amplification, dépendant de l'équipement de la cage de laminoir, par exemple du rapport de transmission ou du diamètre de cylindre, celui-ci est multiplié par un coefficient de normalisation qui tient compte de l'équipement concerné de la cage de laminoir.
  3. Laminoir selon la revendication 1 ou 2,
       caractérisé par le fait que,
       un indicateur de hauteur de boucle (S1, S2, S3) est disposé entre deux cages respectives de laminoir (A3, A4 ; A4, A5 ; A5, A6) pour détecter la hauteur de boucle, et qu'un circuit de calcul est prévu pour convertir la hauteur de boucle en allongement de boucle ou en longueur de produit à laminer.
  4. Laminoir selon la revendication 3,
       caractérisé par le fait que,
       une courbe caractéristique est mémorisée dans le circuit de calcul, au moyen de laquelle l'allongement de la boucle ou la longueur du produit à laminer sont déterminés à partir de la hauteur respective de la boucle.
  5. Laminoir selon la revendication 3,
       caractérisé par le fait que,
       le circuit de calcul calcule l'allongement de la boucle ou la longueur du produit à laminer à partir de la hauteur de la boucle au moyen d'un algorithme.
  6. Laminoir selon la revendication 5,
       caractérisé par le fait que,
       le circuit de calcul détermine l'allongement de la boucle selon la formule SV = 2 · (a 2 + SH 2 ) 0,5 - 2a
    Figure imgb0004
     avec
    2a =   la distance des cylindres ou des rouleaux délimitant la boucle, et
    SH =   la hauteur de la boucle.
  7. Laminoir selon l'une quelconque des revendications 1 à 6,
       caractérisé par le fait que,
       les régulateurs régulent à chaque fois la vitesse de rotation de la cage de laminoir située du côté amont de la boucle dans le sens du laminage.
  8. Laminoir selon la revendication 7,
       caractérisé par le fait que,
       les vitesses de rotation d'autres cages de laminoir situées dans la zone du même produit à laminer sont modifiées dans le même rapport que la vitesse de rotation de la cage de laminoir régulée.
  9. Laminoir selon la revendication 7 ou 8,
       caractérisé par le fait que,
       la dernière cage de laminoir est la cage directrice dont la vitesse de rotation est prescrite.
  10. Laminoir selon l'une des revendications 7 à 9,
       caractérisé par le fait que,
       dans le cas d'un train de laminoir à plusieurs voies, la dernière cage de la zone à plusieurs voies dans le sens du laminage est la cage directrice au moins aussi longtemps qu'un produit à laminer se trouve dans la zone à plusieurs voies, étant précisé que dans la zone à plusieurs voies il est procédé à une régulation des vitesses de rotation des cages situées respectivement du côté amont de la boucle dans le sens du laminage, et que dans la zone à une voie du produit à laminer il est procédé à une régulation des vitesses de rotation des cages situées respectivement du côté aval de la bouche dans le sens du laminage, et que, après la sortie du produit laminé de la cage directrice de la zone à plusieurs voies, le sens d'action de la régulation de boucle de la zone à une voie est inversé de telle sorte qu'il est procédé à une régulation des vitesses de rotation des cages situées respectivement du côté amont de la bouche dans le sens du laminage.
EP93918963A 1992-09-29 1993-09-08 Laminoir avec un dispositif de regulation de la vitesse de rotation des cylindres Revoked EP0662869B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4232685 1992-09-29
DE4232685A DE4232685A1 (de) 1992-09-29 1992-09-29 Vorrichtung zum Regeln der Drehzahlen der Walzen eines Walzwerkes
PCT/DE1993/000826 WO1994007618A1 (fr) 1992-09-29 1993-09-08 Dispositif de regulation de la vitesse de rotation des cylindres d'un laminoir

Publications (2)

Publication Number Publication Date
EP0662869A1 EP0662869A1 (fr) 1995-07-19
EP0662869B1 true EP0662869B1 (fr) 1997-12-29

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EP93918963A Revoked EP0662869B1 (fr) 1992-09-29 1993-09-08 Laminoir avec un dispositif de regulation de la vitesse de rotation des cylindres

Country Status (6)

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US (1) US5619880A (fr)
EP (1) EP0662869B1 (fr)
JP (1) JPH08501501A (fr)
AT (1) ATE161443T1 (fr)
DE (2) DE4232685A1 (fr)
WO (1) WO1994007618A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1280208B1 (it) * 1995-08-03 1998-01-05 Ceda Spa Costruzioni Elettrome Procedimento di controllo intergabbia del tiro del laminato e relativo dispositivo
US6339945B2 (en) 1998-01-27 2002-01-22 Pacific Roller Die Co., Inc. Apparatus for forming tapered spiral tubes
DE19809917A1 (de) * 1998-03-07 1999-09-09 Schloemann Siemag Ag Feinstahl- oder Drahtstraße mit Vorstraße, Zwischenstraße und mehrgerüstigem Fertigblock
US6128934A (en) * 1999-04-30 2000-10-10 Lone Star Technologies, Inc. Stretch reduction mill
US6708077B2 (en) * 2002-08-16 2004-03-16 General Electric Company Furnace pacing for multistrand mill
DE102007031333A1 (de) * 2007-07-05 2009-01-15 Siemens Ag Walzen eines Bandes in einer Walzstraße unter Nutzung des letzen Gerüsts der Walzstraße als Zugverringerer
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
EP2460597A1 (fr) * 2010-12-01 2012-06-06 Siemens Aktiengesellschaft Procédé de commande d'une voie de laminage en tandem, dispositif de commande et/ou de réglage pour une voie de laminage en tandem, code de programme lisible par machine, support de stockage et voie de laminage en tandem
CN108213092B (zh) * 2018-02-08 2023-07-25 天津市富仁板带有限公司 一种升降活套

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Publication number Priority date Publication date Assignee Title
US3181713A (en) * 1962-04-19 1965-05-04 Gen Electric Article handling system
US3811304A (en) * 1972-09-20 1974-05-21 Gen Electric Looper controlled rolling mill
US4099244A (en) * 1977-03-17 1978-07-04 Bethlehem Steel Corporation Recalibration system for electro-optical gage
CS209071B1 (en) * 1979-04-18 1981-10-30 Jiri Badal Method of loop regulation of continuous processes and connection for execution of this method
DE3101512A1 (de) * 1981-01-19 1982-08-26 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur drehzahlregelung in einer mehradrigen, schlingengeregelten kontistrasse
JPS57130712A (en) * 1981-02-02 1982-08-13 Mitsubishi Electric Corp Loop controlling device
JPS6092009A (ja) * 1983-10-25 1985-05-23 Toshiba Corp ル−プ位置制御方法
JPH0622726B2 (ja) * 1986-03-07 1994-03-30 株式会社神戸製鋼所 ル−プ制御装置
DE4105321A1 (de) * 1991-02-20 1992-08-27 Siemens Ag Regelung eines warm- und/oder kaltwalzprozesses
DE4117054A1 (de) * 1991-05-22 1992-11-26 Mannesmann Ag Sizing-geruest gruppe

Also Published As

Publication number Publication date
DE4232685A1 (de) 1994-03-31
JPH08501501A (ja) 1996-02-20
WO1994007618A1 (fr) 1994-04-14
EP0662869A1 (fr) 1995-07-19
ATE161443T1 (de) 1998-01-15
US5619880A (en) 1997-04-15
DE59307903D1 (de) 1998-02-05

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