EP3795267B1 - Procédé de fonctionnement d'une cage de laminoir - Google Patents
Procédé de fonctionnement d'une cage de laminoir Download PDFInfo
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- EP3795267B1 EP3795267B1 EP20196043.2A EP20196043A EP3795267B1 EP 3795267 B1 EP3795267 B1 EP 3795267B1 EP 20196043 A EP20196043 A EP 20196043A EP 3795267 B1 EP3795267 B1 EP 3795267B1
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- 238000000034 method Methods 0.000 title claims description 36
- 238000005096 rolling process Methods 0.000 title claims description 24
- 238000012937 correction Methods 0.000 claims description 56
- 230000008859 change Effects 0.000 claims description 27
- 238000005452 bending Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 230000006735 deficit Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 4
- 238000005097 cold rolling Methods 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 45
- 238000012806 monitoring device Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 230000003449 preventive effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 238000013000 roll bending Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
Images
Classifications
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
-
- 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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
-
- 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
Definitions
- the invention relates to a method for operating a roll stand with a pair of work rolls which create a roll gap for rolling a metal strip.
- Such roll stands are generally known in the prior art, e.g. B. from the Chinese patent CN 102581035B .
- Each of the k'th control loops has a k'th actuator for controlling a k'th controlled variable.
- the target value for the first controlled variable in the prior art is variable over time or has a variable over time portion to compensate for changes in process variables during a rolling process. Due to the temporal variability of the setpoint, the actuator of the first control loop can reach its performance limit; please refer Figure 5a : "without correction". This can result in a shortfall in travel in the first actuator.
- the invention is based on the object of further developing a known method for operating a roll stand with a first and at least one further control circuit such that the occurrence of a (such) power deficit in the actuator of the first control circuit is prevented.
- the monitoring of the time profile of the setpoint of the first controlled variable as claimed there with regard to the threshold values Min, Max, which lie within the performance limits of the first actuator, advantageously enables a preventive initiation of a countermeasure before the master actuator due to a specified setpoint that is too large reaches its performance limit for the first controlled variable.
- the countermeasure provides that as soon as the Min or Max threshold value is reached, i.e. before the lower or upper power limit of the master actuator is reached, the setpoint for the first controlled variable is increased or decreased by a correction component determined according to the invention.
- the corrected setpoint calculated in this way for the first control variable is usually smaller than the previously provided setpoint and is specified for the first control circuit instead of the previously provided setpoint.
- the correction components for the master setpoint value SM are dimensioned preventively in such a way that the master actuator is not even driven to its upper or lower performance limit.
- the stability of a rolling installation can be increased in that actuators are specifically moved to operating points that are favorable for the rolling process by linking the master-slave control circuits according to the invention.
- These working points can offer advantages in terms of process technology, such as targeted control of the actuators in tried and/or pre-calculated working areas.
- actuators with high dynamic properties are strategically kept in work areas in where they can react quickly to any process changes that may occur, such as damage to the incoming material.
- the assignment of the link between master and slave actuators offers additional flexibility.
- the assignment of the actuators can be different for different process situations and/or system types. For example, a different actuator can be defined as the master actuator for a bandwidth r than for a bandwidth j.
- the assignment and priorities of the slave actuators can also be changed in real time using the factor ak for optimal adaptation to current process conditions.
- the method according to the invention can be used both for hot rolling and for cold rolling of metal strip.
- Both the master control circuit and all slave control circuits are operated continuously or iteratively over time. i.e. there is a continuous or ongoing regulation of the controlled variable to its specified setpoints.
- setpoint used in part of the description and in the claims is representative of a setpoint signal that changes over time. Due to the time-discrete consideration customary in digital technology, the term “setpoint” is also used in the description; however, this target value is by no means absolutely necessary to be regarded as constant over time.
- figure 1 shows a first or master control circuit 130 for controlling a first controlled variable in a roll stand 100 to a predetermined master setpoint value SM setpoint n* .
- this setpoint is compared with an actual value of the controlled variable SM actual n .
- a comparison device 134 typically a difference generator.
- the result of this comparison is input as a system deviation into a master controller 133, which generates an actuator for a master actuator 132 at its output.
- the master actuator influences the controlled system 131 of the first or master control circuit 130.
- the controlled system consists here, for example, of a roll stand 100 for rolling metal strip 120 with the help of work rolls 110.
- the roll stand 100 When the roll stand 100 is designed in four-high design, the Work rolls 110 each associated with back-up rolls. If the roll stand is designed in a six-high design, the roll stand also has intermediate rolls in addition to the work and back-up rolls (in figure 1 Not shown). According to the figure 1 In the control circuit 130 shown, the controlled variable at the output of the controlled system 131 is detected using a detection device 136, typically a measuring element. The controlled variable recorded is the said actual value of the controlled variable, which is switched at the output of the recording device 136 to the input of the master comparator device 134 .
- a detection device 136 typically a measuring element.
- the controlled variable recorded is the said actual value of the controlled variable, which is switched at the output of the recording device 136 to the input of the master comparator device 134 .
- figure 2 shows the structure of said master setpoint correction device 135 in detail.
- this correction device the sum of the previous master setpoint value SM setpoint n and the previously calculated correction components y1_n-1 and y2_n-1 is monitored in a threshold value monitoring device 135-1 to determine whether it exceeds a specified upper threshold value Max or a specified one falls below the lower threshold Min.
- the result is provided at the output of the monitoring device 135-1, here by way of example in the form of the output signals x 1 , x 2 , which are binary-coded, for example.
- the signals x 1 and x 2 are actually enable signals for enabling a calculation unit 135-2 for a correction component y1 for the master setpoint or to enable a calculation unit 135-3 for an alternative correction component y2 for the master setpoint value SM setpoint n .
- n 1 . . . N representing discrete points in time. These points in time are specified by the control clock cycles, ie the runs of the control loop.
- the correction components y1 and y2 calculated in this way are as follows figure 2 into a calculation unit 135-4 for calculating the corrected setpoint value SM setpoint n* .
- the calculation unit is typically an addition device which adds the correction components y1 and y2 to the previous master setpoint SM setpoint n in order to calculate the said corrected setpoint signal in this way.
- the correction component y1 is typically negative and the correction component y2 is typically positive.
- the sign must be selected in such a way that the setpoint SM setpoint n+1 is shifted into the tolerance range.
- the corrected setpoint value SM setpoint n* is typically smaller than the previous master setpoint value SM setpoint n .
- the calculation units 135-2 and 135-3 for the correction components y1 and y2 are individually blocked; this is done with the in figure 2 indicated disable signals DIS y2 and DIS y1 .
- at least one further slave control circuit 140-k is assigned to the roll stand 100 in addition to the master control circuit 130.
- figure 3 illustrates the structure of such a slave control loop 140-k in detail. It is constructed analogously for all slaves k.
- the slave control circuit 140-k is used to control a slave control variable SL k actual n to a corrected desired value SL k desired n* .
- the actual value of the controlled variable is detected with the aid of a detection device 146-k and compared with the corrected setpoint value SL k setpoint n* in a slave comparator 144-k.
- the result is supplied in the form of a control deviation to the k'th controller 143-k, which provides a control signal for a k'th slave actuator 142-k at its output.
- the slave actuator 142-k influences a k'th controlled system 141-k.
- This slave controlled system 141 - k is typically the same roll stand 100 that also represents the master controlled system 131 of the first control loop 130 .
- figure 4 shows the structure of a k'th setpoint correction device 145-k in detail.
- a performance deficit ⁇ p k of the k'th actuator is also determined.
- the detected travel error is distributed to the remaining slave actuators by appropriately changing the respective coefficients ak of the remaining slave actuators.
- the power deficits ⁇ p k determined in the k-slave setpoint correction devices 145-k are sent to a likewise in figure 4 shown power distribution calculation device 150 entered, so that on the basis of said input signals the coefficients a k for the individual slave setpoint correction devices 145-k updated and also provides the lock or disable signals DIS y1 and DIS y2 for the calculation units 135-2 and 135-3 for the correction components y1 and y2.
- At least one of the correction components of the first controlled variable is kept constant; this is done by the said disable signals DIS y1 and DIS y2 calculated by the power distribution calculator 150 as above with reference to FIG figure 4 described.
- the inventive method is described below with reference to the Figures 5a, 5b and 5c described in more detail:
- the upper and lower physical power limits of the master actuator 132 are entered. They correspond to an upper and/or a lower, positive and/or negative operating limit of the master actuator 132.
- the invention provides that these performance limits are exceeded when the master actuator is actuated with the associated control signal S generated by the master controller 133 x should never be reached, even if the master setpoint or its change over time is very large.
- the setpoint value SM setpoint n is monitored according to the invention with regard to reaching low-threshold limit values Max, Min with the aid of the monitoring device 135-1.
- limit values are lower-threshold insofar as they lie within the upper and lower power limits of the master actuator. By monitoring these low-threshold limit values, it is possible to take preventive action before the upper or lower power limit is reached, in that, according to the invention, said correction components y1 and y2 are calculated for the master setpoint. From a synopsis of Figures 5a and 5b it can be seen that the master setpoint SM setpoint is reached when the upper limit value Max is reached at the time n is reduced by adjusting the amount of correction component y1. This results in the corrected master setpoint at time n1.
- the corrected master setpoint SM setpoint n1* reduced in this way is further away from the upper power limit and is also lower and more stable within a tolerance range T spanned by the upper and lower limit values Max, Min. But also this corrected master setpoint at the time n1 is also monitored in the monitoring device 135-1 with regard to whether the upper or lower limit value has been reached. If this is determined at point in time n2, then a new correction takes place, specifically a new reduction in its value by a then newly calculated correction component y1. This correction results in a new, corrected master setpoint value SM setpoint n2* at time n2.
- the process of the master actuator takes place through the opposite activation of at least one slave actuator with only minor flatness disturbances or even flatness-neutral.
- the master actuator 132 is preferably set to be the bender.
- any flatness defects that occur due to fluctuations in the rolling force are compensated for by a Profile-Gauge Meter PGM.
- the functionality of the PGM includes the pre-control of rolling force changes on bends in order to keep the roll gap profile and/or the roll gap contour between the work rolls 110 of the roll stand 100 as constant as possible in the event of a fluctuation in the rolling force.
- the quality of the difference quotient dQM required for the PGM pre-control depends heavily on the current operating point.
- the PGM must always have a bending reserve in the event of a sudden change in force, e.g. B. to be able to react quickly to overpickled spots on steel strips.
- the bending reserve corresponds to in Figure 5a the distance between the upper power limit and the upper limit value Max or the distance between the lower power limit and the lower limit value Min.
- the work roll bending is used for the PGM pre-control and is accordingly defined as a master controlled variable with corresponding master setpoint specifications.
- the associated master actuator 132 can reach its physical limits, ie its upper or lower performance limit.
- an allowed error e.g. B. 4th order
- monitor and within its limits a replacement of the work roll bending by z. B. allow at least partial axial displacement for the work rolls.
- the movement of the master actuator occurs through the opposite activation of at least one slave actuator with only minor flatness disturbances or even flatness-neutral.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Claims (15)
- Procédé d'exploitation d'une cage de laminoir (100), qui comprend : une paire de cylindres de travail (110) destinés à serrer une emprise de laminage pour le laminage d'une bande métallique (120), un premier circuit de régulation (130) avec un premier organe de réglage (132) servant à régler une première grandeur de régulation et k autres circuits de régulation (140-k) avec chacun un k-ième organe de réglage (142-k) servant à régler une k-ième grandeur de régulation, où k varie de 1 à K,
ledit procédé comprenant les étapes suivantes :déterminer que le premier organe de réglage (132) agit comme organe de réglage maître et que les k-ièmes organes de réglage (142-k) agissent chacun comme organe de réglage esclave ; et définir la valeur de consigne (SMSoll n) pour la première grandeur de régulation ;ledit procédé étant caractérisé par les étapes suivantes :surveiller l'évolution dans le temps de la valeur de consigne (SMSoll n) pour la première grandeur de régulation afin de déterminer si la valeur de consigne dépasse une valeur seuil supérieure (Max) ou si elle est inférieure à une valeur seuil inférieure (Min), la valeur seuil supérieure et la valeur seuil inférieure se situant à l'intérieur d'une plage de tolérance définie par la limite de puissance supérieure et la limite de puissance inférieure du premier organe de réglage ;dans l'affirmative :i) déterminer au moins une composante de correction (y1, y2) de telle sorte que la valeur de consigne pour la première grandeur de régulation soit déplacée en direction de la plage de tolérance, calculer une valeur de consigne corrigée (SMSoll n*) pour la première grandeur de régulation à partir de la valeur de consigne précédente (SMSoll n) pour la première grandeur de régulation en tenant compte de la composante de correction (y1, y2) et régler la première grandeur de régulation sur la valeur de consigne corrigée (SMSoll n*) par une commande appropriée de l'organe de réglage maître (132) ; etii) calculer une composante de compensation (ZSLk=1) pour la valeur de consigne (SLk=1Soll n) de la k=1-ième grandeur de régulation, en tenant compte de la composante de correction (y1, y2) pour la valeur de consigne (SMSoll n) de la première grandeur de régulation ; calculer une valeur de consigne corrigée (SLk=1Soll n*) pour la k=1- ième grandeur de régulation à partir de la valeur de consigne précédente (SLk=1Soll n) pour la k=1-ième grandeur de régulation en tenant compte de la composante de compensation (ZSLk=1), et régler la k=1-ième grandeur de régulation sur la valeur de consigne corrigée (SMSoll n*) pour la k=1-ième grandeur de régulation par une commande appropriée du k=1-ième organe de réglage esclave (142-1). - Procédé selon la revendication 1,
caractérisé en ce que
la cage de laminoir comporte en outre d'autres circuits de régulation esclaves (où k varie de 2 à K) ; et
le procédé comprend en outre les étapes suivantes :
exécuter les étapes ii) de manière analogue pour chacun des autres k = 2 jusqu'à K circuits de régulation avec leur k=2 jusqu'au K-ième organe de réglage esclave respectif (142-k). - Procédé selon l'une des revendications précédentes,
caractérisé en ce que- dans le cas où il est constaté, lors de la surveillance, que la valeur de consigne (SMSoll n) pour la première grandeur de régulation dépasse la valeur seuil supérieure (Max) de la plage de tolérance (x1=1, x2=0) - la composante de correction (y1) est prédéfinie de manière spécifique en fonction du processus ou de l'installation ou est calculée selon la formule suivante :- dans le cas où il est constaté, lors de la surveillance, que la valeur de consigne (SMSoll n) pour la première grandeur de régulation est inférieure à la valeur seuil inférieure (Min) de la plage de tolérance (x1=0, x2=1) - la composante de correction (y2) est prédéfinie de manière spécifique en fonction du processus ou de l'installation ou est calculée selon la formule suivante :- dans le cas où il est constaté, lors de la surveillance, que la valeur de consigne pour la première grandeur de régulation ne dépasse ni la valeur seuil supérieure (Max) de la plage de tolérance, ni la valeur seuil inférieure (Min) de la plage de tolérance (x1=0, x2=0) ou lorsque les signaux de désactivation (DISy1 et/ou DISy2) provenant du dispositif de calcul de la distribution de puissance (150) sont activés - les composantes de correction (y1, y2) pour la valeur de consigne (SMSoll n) de la première grandeur de régulation sont calculées de la manière suivante :n = 1...N moments temporels discrets ;Cposn : Erreur de planéité maximale admissible ou modification maximale admissible du contour du profil d'emprise, respectivement du 2e ordre ou d'ordre supérieur, ou la somme des deux, valable pour une modification de la valeur de consigne dans le sens positif ;Cnegn : Erreur de planéité minimale admissible ou modification minimale admissible du contour du profil d'emprise, respectivement du 2e ordre ou d'ordre supérieur, ou la somme des deux, valable pour une modification de la valeur de consigne dans le sens négatif ;dQMn : Rapport entre la modification de la valeur de consigne de la grandeur de régulation de l'organe de réglage maître et la modification de la planéité du 2e ordre ou d'ordre supérieur de la bande métallique ; ou rapport entre la modification de la valeur de consigne de la grandeur de régulation de l'organe de réglage maître et la modification du contour de l'emprise de laminage du 2e ordre ou d'ordre supérieur. - Procédé selon l'une des revendications 3 ou 4,
caractérisé en ce que
la composante de compensation (ZSLk=2-K) pour l'organe de réglage esclave k est calculée selon la formule suivante :k=1...K : nombre d'organes de réglage esclave 142-k - Procédé selon l'une des revendications précédentes,
caractérisé en ce que
la première et chacune des k-ièmes grandeurs de régulation sont choisies parmi l'ensemble des grandeurs suivantes :Force de flexion pour les cylindres de travail et/ou les cylindres intermédiaires de la cage de laminoir ;Position et/ou déplacement horizontal des cylindres de travail et/ou des cylindres intermédiaires ;Position, force et/ou angle de rotation d'un dispositif excentrique pour le réglage d'une modification du contour de l'emprise entre les cylindres ; et/ou Pression d'un fluide de refroidissement, débit du fluide de refroidissement, angle d'inclinaison d'un dispositif de refroidissement par zones pour refroidir un cylindre de travail (110) sur sa largeur afin de régler ou de modifier le contour de l'emprise entre les cylindres ;Pression d'un fluide de chauffage, débit du fluide de chauffage, angle d'inclinaison d'un dispositif de chauffage par zones pour chauffer un cylindre de travail sur sa largeur afin de régler ou de modifier le contour de l'emprise entre les cylindres;Intensité du courant, puissance électrique pour le chauffage inductif des cylindres ;Position différentielle entre le côté commande et le côté entraînement d'un dispositif de réglage hydraulique pour les cylindres (110). - Procédé selon l'une des revendications précédentes,
caractérisé en ce que
l'organe de réglage maître (132) et chacun des organes de réglage esclaves (142-k) sont choisis parmi l'ensemble des organes de réglage suivants :- Dispositif de cintrage pour les cylindres de travail et/ou les cylindres intermédiaires de la cage de laminoir (100) ;- Déplacement axial pour les cylindres de travail et/ou intermédiaires ;- Dispositif excentrique pour le réglage d'une modification du contour de l'emprise entre les cylindres ;et/ou- Dispositif de refroidissement par zones doté de soupapes à commande individuelle pour le dispositif de refroidissement destiné à refroidir un cylindre de travail sur sa largeur afin de régler ou de modifier le contour de l'emprise entre les cylindres;- Dispositif de chauffage par zones doté de soupapes à commande individuelle pour le moyen de chauffage destiné à chauffer un cylindre de travail sur sa largeur afin de régler ou de modifier le contour de l'emprise entre les cylindres;- Chauffage inductif des cylindres ;- Cylindre de réglage du dispositif de réglage hydraulique, en particulier des cylindres de travail (110). - Procédé selon l'une des revendications 6 ou 7,caractérisé en ce que- si la cage de laminoir (100) est une cage quarto - alors :la première grandeur de régulation : la force de flexion ; etk=1-ième grandeur de régulation : le déplacement axial ;oula première grandeur de régulation : le déplacement axial et ;k=1-ième grandeur de régulation : la force de flexion.
- Procédé selon la revendication 8,caractérisé en ce quepour les deux alternatives selon la revendication 8, on a, en outre, à titre optionnelk=2-ième grandeur de régulation : le refroidissement par zones
- Procédé selon l'une des revendications 6 ou 7,caractérisé en ce que- si la cage de laminoir est une cage sexto - alors :la première grandeur de régulation : la force de flexion pour les cylindres de travail et ;k=1-ième grandeur de régulation : la force de flexion pour les cylindres intermédiaires et ;k=2-ième grandeur de régulation : le déplacement axial des cylindres intermédiaires.oula première grandeur de régulation : la force de flexion pour les cylindres intermédiaires ; etk=1-ième grandeur de régulation : la force de flexion pour les cylindres de travail et ;k=2-ième grandeur de régulation : le déplacement axial des cylindres intermédiaires ;oula première grandeur de régulation : le déplacement axial des cylindres intermédiaires ;k=1-ième grandeur de régulation : la force de flexion pour les cylindres intermédiaires ; etk=2-ième grandeur de régulation : la force de flexion pour les cylindres de travail.
- Procédé selon la revendication 10,caractérisé en ce quepour les trois alternatives selon la revendication 10, on a, en outre, à titre optionnelk=3-ième grandeur de régulation : le refroidissement par zones
- Procédé selon l'une des revendications précédentes,
caractérisé en ce que
le laminage est un laminage à chaud ou un laminage à froid. - Procédé selon l'une des revendications précédentes,caractérisé parsurveiller la limite de puissance supérieure et/ou inférieure du k-ième organe de réglage ;déterminer un déficit de puissance (Δpk) du k-ième organe de réglage ; et dans le cas où la limite de puissance supérieure ou inférieure du k-ième organe de réglage esclave est atteinte : répartir le déficit de puissance entre les organes de réglage esclaves restants en modifiant de manière appropriée les coefficients ak respectifs des organes de réglage esclaves restants.
- Procédé selon la revendication 13,
caractérisé en ce que
dans le cas où les organes de réglage esclaves restants ne parviennent pas à compenser de manière suffisante le déficit de déplacement du k-ième organe de réglage esclave, au moins une des composantes de correction (y1, y2) de la première grandeur de régulation est maintenue constante. - Procédé selon l'une des revendications 7 à 14,
caractérisé en ce que
lorsque la largeur de la bande métallique (120) dépasse une valeur seuil de largeur prédéfinie, le dispositif de cintrage est défini comme organe de réglage maître (132).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019214192.7A DE102019214192A1 (de) | 2019-09-18 | 2019-09-18 | Verfahren zum Betreiben eines Walzgerüstes |
Publications (2)
Publication Number | Publication Date |
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EP3795267A1 EP3795267A1 (fr) | 2021-03-24 |
EP3795267B1 true EP3795267B1 (fr) | 2022-07-13 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20196043.2A Active EP3795267B1 (fr) | 2019-09-18 | 2020-09-14 | Procédé de fonctionnement d'une cage de laminoir |
Country Status (2)
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EP (1) | EP3795267B1 (fr) |
DE (1) | DE102019214192A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55120409A (en) | 1979-03-09 | 1980-09-16 | Nippon Steel Corp | Controlling method for shape in six-stage rolling mill |
EP0171732A1 (fr) | 1984-08-10 | 1986-02-19 | Kabushiki Kaisha Toshiba | Méthode et système de contrôle d'épaisseur pour cage de laminoir unique à passes multiples |
JPS62168607A (ja) | 1986-01-20 | 1987-07-24 | Nippon Steel Corp | 板圧延における形状制御方法 |
JPS63177910A (ja) | 1987-01-16 | 1988-07-22 | Nippon Steel Corp | 板圧延における形状制御方法 |
JPH02255208A (ja) | 1989-03-29 | 1990-10-16 | Sumitomo Metal Ind Ltd | 板圧延における形状制御方法 |
JPH05104120A (ja) | 1991-10-11 | 1993-04-27 | Hitachi Ltd | 6重圧延機の形状制御方法および装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4000449A (en) * | 1974-10-22 | 1976-12-28 | Westinghouse Electric Corporation | Electrical shaft system |
CN102581035B (zh) | 2012-01-30 | 2014-07-02 | 中冶南方工程技术有限公司 | 一种冷轧带钢板形前馈控制系统 |
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2019
- 2019-09-18 DE DE102019214192.7A patent/DE102019214192A1/de active Pending
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2020
- 2020-09-14 EP EP20196043.2A patent/EP3795267B1/fr active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55120409A (en) | 1979-03-09 | 1980-09-16 | Nippon Steel Corp | Controlling method for shape in six-stage rolling mill |
EP0171732A1 (fr) | 1984-08-10 | 1986-02-19 | Kabushiki Kaisha Toshiba | Méthode et système de contrôle d'épaisseur pour cage de laminoir unique à passes multiples |
JPS62168607A (ja) | 1986-01-20 | 1987-07-24 | Nippon Steel Corp | 板圧延における形状制御方法 |
JPS63177910A (ja) | 1987-01-16 | 1988-07-22 | Nippon Steel Corp | 板圧延における形状制御方法 |
JPH02255208A (ja) | 1989-03-29 | 1990-10-16 | Sumitomo Metal Ind Ltd | 板圧延における形状制御方法 |
JPH0636926B2 (ja) | 1989-03-29 | 1994-05-18 | 住友金属工業株式会社 | 板圧延における形状制御方法 |
JPH05104120A (ja) | 1991-10-11 | 1993-04-27 | Hitachi Ltd | 6重圧延機の形状制御方法および装置 |
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DE102019214192A1 (de) | 2021-03-18 |
EP3795267A1 (fr) | 2021-03-24 |
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