EP0734795B1 - Method for feedforward thickness control in rolling of foils - Google Patents
Method for feedforward thickness control in rolling of foils Download PDFInfo
- Publication number
- EP0734795B1 EP0734795B1 EP96104291A EP96104291A EP0734795B1 EP 0734795 B1 EP0734795 B1 EP 0734795B1 EP 96104291 A EP96104291 A EP 96104291A EP 96104291 A EP96104291 A EP 96104291A EP 0734795 B1 EP0734795 B1 EP 0734795B1
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- European Patent Office
- Prior art keywords
- thickness
- rolling
- control
- strip
- setting
- Prior art date
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- Expired - Lifetime
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- 238000005096 rolling process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011888 foil Substances 0.000 title claims abstract description 9
- 230000033228 biological regulation Effects 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 15
- 230000008859 change Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
-
- 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
- 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
- B21B1/40—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 foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/02—Tension
- B21B2265/04—Front or inlet tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/08—Braking or tensioning arrangements
Definitions
- the invention relates to a method for thickness precontrol in Foil rollers with the help of effect characteristics stored in a process computer of the individual manipulated variables (e.g. strip tension, rolling speeds) for different working points (operating states) or with the help of an on-line working physical calculation model, also in combination with a monitor control.
- a process computer of the individual manipulated variables (e.g. strip tension, rolling speeds) for different working points (operating states) or with the help of an on-line working physical calculation model, also in combination with a monitor control.
- the thickness can no longer be used in film rolling Regulate with the help of a position control, because this is extremely high Tape module of the film fails, which is also the use of a tape roll usual Thickness feedforward excludes, with which in time with the achievement of a incoming thickness error the rolling force or the position of the employment so can change that the outlet thickness remains as unchanged as possible.
- Thickness feedforward excludes, with which in time with the achievement of a incoming thickness error the rolling force or the position of the employment so can change that the outlet thickness remains as unchanged as possible.
- JP-A 2-268 913 has made it known for the rolling of metallic strips, Changes in tensile stress based on thickness measurements of the Determine the strip and the thickness of the rolled strip by appropriate positioning of bending rollers immersed in the belt. From US-A 4 548 063 a regulation is known for the rolling of a metal strip, of which assumes that the expected inlet speed change in the case of a incoming thickness error is compensated during the decoiler itself undisturbed by it, continuing to focus on the constancy of withdrawal, which means that ultimately only the constancy of the withdrawal is regulated. Also at Rolling metallic strips is described in JP-A 57-193 216 and JP-A 62-104 614 known, for the thickness accuracy of the finished strip based on thickness measurements To take regulatory measures, such as influencing the Rolling speed.
- the invention is therefore based on the object of a method to create the kind mentioned at the outset, with which the consequences of an upstream Compensate for thickness deviations faster and better.
- the thickness deviations Film determined on the inlet side and compensated by a thickness control, the manipulated variable, preferably while maintaining the other rolling parameters the belt tension by means of a highly dynamic adjusting device depending on the Working point is changed.
- the invention lies here both through practical Experience as well as knowledge gained through theoretical investigations is based on the fact that, in good approximation, an inlet-side thickness deviation of the film directly on the outlet side is directly proportional to the reduction. Therefore do it empirically obtained or with the help of a physical-mathematical calculation model knowledge about the effects of a change in Rolling parameters the thickness precontrol according to the invention for film rolling possible, i.e.
- Analogous to monitor control namely the retraction voltage is the most effective manipulated variable for influencing the film thickness
- the dependencies of the effects of a Inlet thickness change from the manipulated variable, preferably the retraction voltage various operating points determined and in the process computer for the Thickness control saved.
- a working point is defined by a certain one Combination of process parameters, e.g. Outlet thickness, rolling speed, preferred tension, Roll diameter or lubrication.
- the regulation according to the invention by means of thickness precontrol is moreover able to evaluate whether a Pre-control intervention or a possibly necessary Intervention of a downstream thickness control with a certain manipulated variable is still possible or useful. If for example the difference quotient tends towards infinity, this means that the manipulated variable has no effect and another manipulated variable must be used when rolling foils for example the outlet tension or the rolling force, but their effect is rather indirect through a shift of the Working point can be seen.
- Fig. 1 shows a diagram of a plant 1 for rolling a Foil or a film strip 2.
- the film strip 2 is one Bund 3 withdrawn from a reel 4 and the roll gap 5 one Roll stand 6 of a downstream one, not further in detail shown rolling mill supplied.
- the roll stand 6 is made from an upper and a lower support roller 7 and the associated work rolls 8.
- a commercial thickness gauge 9 is arranged and electrically connected to a higher-level process computer 10.
- the thickness measuring device 9 is arranged in front of the roll stand 6 Traction means 11 in the form of three rollers 12 and 13 respectively downstream 3-roller bridges.
- the middle Roll 13 is hydraulic, controlled by force or position adjustable and electrical also with the process computer 10 connected control role formed, which - as shown - If necessary, immersed in the film strip and by means of a Changing the strap loop 14 affects the retraction voltage.
- FIG. 2 shows another embodiment of a system 100 for Rolling a film or a film strip 2.
- the process largely corresponds to that of the system 1 of FIG. 1 with the Exception that the necessary for the thickness feedforward control rapid withdrawal changes not by means of a intermediate traction means, but directly with a highly dynamic reel 16 can be made.
- the control roller 13 of the traction means 11 is lowered into the tape run of the film 2 as shown in FIG. This is done in a timely manner, ie with a high dynamic of the train change, which enables the control roller 13 to be adjusted, ie lowered and raised.
- the thickness measuring device 9 arranged between the decoiler 4 and the roll gap 5 or roll stand 6, an additive change in tension measured on the basis of the characteristic curve and the inlet thickness error can be achieved, so that a thickness error is avoided in advance with the described control or is largely reduced.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Metal Rolling (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Dickenvorsteuerung beim Folienwalzen mit Hilfe von in einem Prozeßrechner abgespeicherten Wirkungskennlinien der einzelnen Stellgrößen (z.B. Bandzüge, Walzgeschwindigkeiten) für verschiedene Arbeitspunkte (Betriebszustände) bzw. mit Hilfe eines on-line arbeitenden physikalischen Rechenmodells, auch in Kombination mit einer Monitorregelung.The invention relates to a method for thickness precontrol in Foil rollers with the help of effect characteristics stored in a process computer of the individual manipulated variables (e.g. strip tension, rolling speeds) for different working points (operating states) or with the help of an on-line working physical calculation model, also in combination with a monitor control.
Im Gegensatz zum Bandwalzen läßt sich die Dicke beim Folienwalzen nicht mehr mit Hilfe einer Positionsregelung regeln, da diese wegen des außerordentlich hohen Bandmoduls der Folie versagt, was auch den Einsatz einer beim Bandwalzen üblichen Dickenvorsteuerung ausschließt, mit der sich rechtzeitig mit dem Erreichen eines einlaufenden Dickenfehlers die Walzkraft bzw. die Position der Anstellung so verändern läßt, daß die Auslaufdicke möglichst unverändert bleibt. Beim Folienwalzen wird wegen des hohen Bandmoduls nur noch mittels einer kombinierten Rückzugsspannung-/Walzgeschwindigkeitsregelung geregelt. Die Wirkungsweise der Zug-/Geschwindigkeitsregelung basiert auf einer Veränderung des Umformwiderstandes der Folie, so daß sich bei konstanter Walzkraft unterschiedliche Abnahmen einstellen lassen.In contrast to strip rolling, the thickness can no longer be used in film rolling Regulate with the help of a position control, because this is extremely high Tape module of the film fails, which is also the use of a tape roll usual Thickness feedforward excludes, with which in time with the achievement of a incoming thickness error the rolling force or the position of the employment so can change that the outlet thickness remains as unchanged as possible. When film rolling is due to the high strip module only by means of a combined retraction tension / rolling speed control regulated. The mode of action of Train / speed control is based on a change in the forming resistance the film, so that there are different decreases with constant rolling force let set.
Durch die JP-A 2-268 913 ist es für das Walzen von metallischen Bändern bekanntgeworden, Veränderungen der Zugspannung basierend auf Dickenmessungen des Bandes zu ermitteln und die Dicke des Walzbandes durch entsprechendes Positionieren von in das Band eintauchenden Biegerollen zu kontrollieren. Aus der US-A 4 548 063 ist für das Walzen eines Metallbandes eine Regelung bekannt, die davon ausgeht, daß die zu erwartende Einlaufgeschwindigkeitsänderung im Falle eines einlaufenden Dickenfehlers kompensiert wird, während der Ablaufhaspel sich ungestört davon weiterhin auf die Konstanz des Rückzuges konzentriert, was bedeutet, daß letztendlich nur die Konstanz des Rückzuges geregelt wird. Ebenfalls beim Walzen metallischer Bänder ist es aus der JP-A 57-193 216 bzw. der JP-A 62-104 614 bekannt, zur Dickengenauigkeit des Fertigbandes ausgehend von Dickenmessungen Regelungsmaßnahmen vorzunehmen, wie insbesondere die Beeinflussung der Walzgeschwindigkeit.JP-A 2-268 913 has made it known for the rolling of metallic strips, Changes in tensile stress based on thickness measurements of the Determine the strip and the thickness of the rolled strip by appropriate positioning of bending rollers immersed in the belt. From US-A 4 548 063 a regulation is known for the rolling of a metal strip, of which assumes that the expected inlet speed change in the case of a incoming thickness error is compensated during the decoiler itself undisturbed by it, continuing to focus on the constancy of withdrawal, which means that ultimately only the constancy of the withdrawal is regulated. Also at Rolling metallic strips is described in JP-A 57-193 216 and JP-A 62-104 614 known, for the thickness accuracy of the finished strip based on thickness measurements To take regulatory measures, such as influencing the Rolling speed.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, mit dem sich die Folgen einer einlaufseitigen Dickenabweichung schneller und besser kompensieren lassen.The invention is therefore based on the object of a method to create the kind mentioned at the outset, with which the consequences of an upstream Compensate for thickness deviations faster and better.
Diese Aufgabe wird dadurch gelöst, daß Dickenabweichungen der Folie einlaufseitig ermittelt und durch eine Dickensteuerung kompensiert werden, wobei unter Beibehaltung der anderen Walzparameter die Stellgröße, vorzugsweise die Bandzugspannung, durch ein hochdynamisches Stellmittel in Abhängigkeit vom Arbeitspunkt geändert wird. Der Erfindung liegt hierbei die sowohl durch praktische Erfahrungen als auch durch theoretische Untersuchungen gewonnene Erkenntnis zugrunde, daß in guter Näherung eine einlaufseitige Dickenabweichung der Folie direkt proportional zur Reduktion auch auslaufseitig feststellbar ist. Daher machen empirisch gewonnene oder mit Hilfe eines physikalisch-mathematischen Berechnungsmodells ermittelte Kenntnisse über die Auswirkungen einer Änderung von Walzparametern die erfindungsgemäße Dickenvorsteuerung für das Folienwalzen möglich, d.h. einen zeitgerechten Eingriff in den Walzprozeß, um nicht erst mit der Monitorregelung auf einen gemessenen Dickenfehler zu reagieren, sondern ihn bereits im voraus weitgehend zu vermeiden. Analog zur Monitorregelung stellt nämlich die Rückzugspannung die wirksamste Stellgröße zur Beeinflussung der Foliendicke dar. Während die Kenntnis der Wirkungskennlinien für die klassische Foliendickenregelung zwar vorteilhaft, aber nicht zwingend notwendig ist, wird hier vorausgesetzt, daß die Auswirkung einer Stellgrößenänderung zur richtigen Bemessung des Vorsteuerungsschrittes genau bekannt sein muß. Zur richtigen Bemessung des Vorsteuerungsschrittes werden daher die Abhängigkeiten der Auswirkungen einer Einlaufdickenänderung von der Stellgröße, vorzugsweise der Rückzugspannung, an verschiedenen Arbeitspunkten ermittelt und in den Prozeßrechner für die Dickenregelung abgspeichert. Ein Arbeitspunkt ist definiert durch eine bestimmte Kombination von Prozeßparametern, z.B. Auslaufdicke, Walzgechwindigkeit, Vorzugsspannung, Walzendurchmesser oder Schmierung.This object is achieved in that the thickness deviations Film determined on the inlet side and compensated by a thickness control, the manipulated variable, preferably while maintaining the other rolling parameters the belt tension by means of a highly dynamic adjusting device depending on the Working point is changed. The invention lies here both through practical Experience as well as knowledge gained through theoretical investigations is based on the fact that, in good approximation, an inlet-side thickness deviation of the film directly on the outlet side is directly proportional to the reduction. Therefore do it empirically obtained or with the help of a physical-mathematical calculation model knowledge about the effects of a change in Rolling parameters the thickness precontrol according to the invention for film rolling possible, i.e. a timely intervention in the rolling process in order not to start with the Monitor control to respond to a measured thickness error, but it to be largely avoided in advance. Analogous to monitor control, namely the retraction voltage is the most effective manipulated variable for influencing the film thickness While knowing the performance characteristics for classic film thickness control although advantageous, but not absolutely necessary, it is assumed here that that the effect of a manipulated variable change for the correct dimensioning of the Pre-control step must be known exactly. For the correct dimensioning of the Pre-control step, the dependencies of the effects of a Inlet thickness change from the manipulated variable, preferably the retraction voltage various operating points determined and in the process computer for the Thickness control saved. A working point is defined by a certain one Combination of process parameters, e.g. Outlet thickness, rolling speed, preferred tension, Roll diameter or lubrication.
Es läßt sich damit sowohl die notwendige Zahl als auch die Größe der Eingriffe der nachgeschalteten Dickenregelung so klein wie möglich halten, so daß sich entsprechend die durch die Regelung selbst induzierten Störungen des Walzprozesses entscheidend verringern lassen. Die mit Hilfe eines Berechnungsmodelles oder empirisch ermittelten Wirkungskennlinien der einzelnen Stellgrößen für verschiedene Arbeitspunkte sind im Prozeßrechner abgelegt und diejenige Kennlinie, die für den tatsächlich vorherrschenden Betriebszustand gültig ist, wird interpolativ aus der Schar der im Prozeßrechner für verschiedene Arbeitspunkte (Betriebszustände) hinterlegten Kennlinien gewonnen. Aus der Kennlinie selbst läßt sich dann der Differenzquotient der entsprechenden Stellgröße ermitteln. Alternativ lassen sich die Differenzquotienten auch direkt mit Hilfe eines on-line arbeitenden physikalischen Modells ermitteltn. Diese Differenzenquotienten geben an, welche Rückzugsspannungs- bzw. Stellgrößenänderung vorgenommen werden muß, um eine bestimmte Auslaufdickenänderung zu erreichen, z.B. 1 µm Auslaufdickenfehler ausgleichen zu können. Multiplikativ verknüpft mit dem aufgrund einer Einlaufdickenänderung zu erwartenden Auslaufdickenfehler erhält man dann die zur Fehlerkompensation notwendige Änderung der Stellgröße.It can be both the necessary number and the size of the intervention downstream thickness control so small hold as possible so that the by the Regulation of self-induced disruptions in the rolling process significantly reduce. With the help of a Calculation model or empirically determined characteristic curves of the individual manipulated variables for different working points stored in the process computer and the characteristic that for the actually prevailing operating state is valid, becomes interpolative from the crowd in the process computer for different working points (operating states) Characteristic curves obtained. From the characteristic curve itself can then determine the difference quotient of the corresponding manipulated variable. Alternatively, the difference quotients can also be used directly Using an online physical model determined. These difference quotients indicate which ones Retraction voltage or manipulated variable change can be made to achieve a certain change in outlet thickness, e.g. To be able to compensate for 1 µm discharge thickness errors. Multiplicative linked to that due to a change in inlet thickness expected discharge thickness errors are then obtained for Error compensation necessary change of the manipulated variable.
Die erfindungsgemäße Regelung mittels Dickenvorsteuerung ist darüber hinaus in der Lage bewerten zu können, ob ein Vorsteuerungseingriff oder ein unter Umständen notwendiger Eingriff einer nachgeschalteten Dickenregelung mit einer bestimmten Stellgröße noch möglich oder sinnvoll ist. Falls zum Beispiel der Differenzenquotient gegen unendlich strebt, bedeutet dies, daß die Stellgröße keine Wirkung mehr hat und eine andere Stellgröße herangezogen werden muß, beim Folienwalzen beispielsweise die Auslaufzugspannung oder auch die Walzkraft, deren Wirkung aber eher mittelbar durch eine Verlagerung des Arbeitspunktes zu sehen ist.The regulation according to the invention by means of thickness precontrol is moreover able to evaluate whether a Pre-control intervention or a possibly necessary Intervention of a downstream thickness control with a certain manipulated variable is still possible or useful. If for example the difference quotient tends towards infinity, this means that the manipulated variable has no effect and another manipulated variable must be used when rolling foils for example the outlet tension or the rolling force, but their effect is rather indirect through a shift of the Working point can be seen.
Es empfiehlt sich, den Sollwert der Stellgröße und das Stellgrößenregelfenster zur Rückführung des Stellmittels in eine neutrale Position oder auf einen neutralen Wert zu verschieben. It is recommended that the setpoint of the manipulated variable and Control window for returning the control means in a neutral position or towards a neutral value move.
Anstatt sich zur Rückzugsänderung mittels einer Steuerrolle die Trägheit der Haspel zu Nutzen zu machen, kann das Verfahren auch direkt mit Hilfe einer hochdynamischen Haspel durchgeführt werden.Instead of yourself inertia to change withdrawal by means of a control roller The process can also be used directly to make use of the reel with the help of a highly dynamic reel.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus den Ansprüchen und der nachfolgenden Beschreibung, in der ein in den Zeichnungen dargestelltes Ausführungsbeispiel der Erfindung näher erläutert ist. Es zeigen:
- Fig. 1
- eine Schemazeichnung einer Anlage zum Durchführen einer Dickenvorsteuerung beim Folienwalzen mittels einer Steuerrolle;
- Fig. 2
- eine Schemazeichnung einer Anlage zum Durchführen einer Dickenvorsteuerung beim Folienwalzen mittels einem hochdynamischen Haspel; und
- Fig. 3
- ein Diagramm (Kennlinie) zur Kompensation eines Einlaufdickensprunges durch zeitgerechtes Verändern der Rückzugspannung (am Beispiel einer theoretisch ermittelten Kennlinie).
- Fig. 1
- a schematic drawing of a system for performing a thickness feedforward control during film rolling by means of a control roller;
- Fig. 2
- a schematic drawing of a plant for performing a thickness feedforward control during film rolling by means of a highly dynamic reel; and
- Fig. 3
- a diagram (characteristic curve) to compensate for an increase in the inlet thickness by changing the retraction voltage in time (using the example of a theoretically determined characteristic curve).
Die Fig. 1 zeigt ein Schema einer Anlage 1 zum Walzen einer
Folie bzw. eines Folienbandes 2. Das Folienband 2 wird von einem
Bund 3 einer Ablaufhaspel 4 abgezogen und dem Walzspalt 5 eines
Walzgerüstes 6 eines nachgeschalteten, im einzelnen weiter nicht
dargestellten Walzwerkes zugeführt. Das Walzgerüst 6 besteht
aus einer oberen und einer unteren Stützwalze 7 sowie den
dazugehörigen Arbeitswalzen 8.Fig. 1 shows a diagram of a plant 1 for rolling a
Foil or a
Zwischen der Ablaufhaspel 4 und dem Walzwerk bzw. -gerüst 6
ist ein handelsübliches Dickenmeßgerät 9 angeordnet und
elektrisch mit einem übergeordneten Prozeßrechner 10 verbunden.
Dem Dickenmeßgerät 9 ist ein vor dem Walzgerüst 6 angeordnetes
Zugmittel 11 in Form eines sich aus drei Rollen 12 bzw. 13
zusammensetzenden 3-Rollen-Bridles nachgeschaltet. Die mittlere
Rolle 13 ist als kraft- oder positionsgeregelte, hydraulisch
angstellbare und elektrisch ebenfalls mit dem Prozeßrechner
10 verbundene Steuerrolle ausgebildet, die - wie dargestellt
- bedarfweise in das Folienband eintaucht und mittels einer
Veränderung der Bandschlaufe 14 die Rückzugspannung beeinflußt.Between the decoiler 4 and the rolling mill or stand 6
a
Zur Dickenvorsteuerung des Folienbandes 2, bevor dieses in das
Walzgerüst 6 einläuft, sind in dem Prozeßrechner 10 mit Hilfe
eines Berechnungsmodelles oder empirisch ermittelte
Wirkungskennlinien der einzelnen Stellgrößen für verschiedene
Arbeitspunkte abgespeichert worden oder die Wirkung der
Stellgrößen wird on-line berechnet.To pre-control the thickness of the
Die Fig. 2 zeigt eine andere Ausführung einer Anlage 100 zum
Walzen einer Folie bzw. eines Folienbandes 2. Der Ablauf
entspricht weitgehend dem der Anlage 1 nach Fig. 1 mit der
Ausnahme, daß die für die Dickenvorsteuerung notwendigen
schnellen Rückzugänderungen nicht mittels eines
zwischengeschalteten Zugmittels, sondern direkt mit einer
hochdynamischen Haspel 16 vorgenommen werden.2 shows another embodiment of a
Ein Beispiel für eine Dickenvorsteuerung bei der Anlage 1 bzw.
100 nach Fig. 1 bzw. Fig. 2, um durch geeignete Veränderung
der Rückzugspannung eine einlaufende Foliendickenänderung bei
konstanter Auslaufdicke (33 mym), konstanter Walzkraft (6000 kN)
und konstanter Walzgeschwindigkeit auszugleichen, ist in dem
Diagramm nach Fig. 3 gezeigt. Um die nachfolgend beschriebene
Kompensation der Dickenabweichung des einlaufenden Folienbandes
2 zu verdeutlichen, wird ein Einlaufdickensprung des Folienbandes
2 von 72 µm auf 74 µm angenommen.An example for a thickness pre-control in
Dieser Einlaufdickensprung und die gültige Kennlinie des
definierten Arbeitspunktes, die interpolativ aus der Vielzahl
der im Prozeßrechner 10 abgespeicherten Wirkungskennlinien oder
unmittelbar mittels eines physikalischen Prozeßmodelles gewonnen
wird, erlauben es, den Dickensprung durch zeitgerechtes Erhöhen
der Rückzugspannung von 50 N/mm2 auf 55 N/mm2 zu kompensieren;
der beispielhaft gewählte Regelbereich wird durch die in Fig.
3 unterbrochene Regelungskennlinie 17 hervorgehoben.This increase in the inlet thickness and the valid characteristic of the defined operating point, which is obtained interpolatively from the large number of effect characteristics stored in the
Zur Erhöhung der Rückzugspannung auf 55 N/mm2 wird - am Beispiel
der Fig. 1 - die Steuerrolle 13 des Zugmittels 11 wie in Fig.
1 gezeigt in den Bandlauf der Folie 2 abgesenkt, so daß eine
elastische Längenänderung des Folienbandes 2 bewirkt wird. Dies
geschieht zeitgerecht, d.h. mit einer hohen Dynamik der
Zugänderung, die die anstellbare, d.h. absenk- und anhebbare
Steuerrolle 13 ermöglicht. Durch die Einlaufdickenmessung des
Folienbandes mittels des zwischen der Ablaufhaspel 4 und dem
Walzspalt 5 bzw. Walzgerüst 6 angeordneten Dickenmeßgerätes
9 läßt sich somit eine additive und anhand der Kennlinie und
des Einlaufdickenfehlers bemessene Zugänderung erreichen, so
daß mit der beschriebenen Regelung ein Dickenfehler bereits
im voraus vermieden bzw. weitgehend verringert wird.To increase the retraction tension to 55 N / mm 2 - using the example of FIG. 1 - the
Claims (3)
- Method of thickness regulation in foil rolling, with the aid of characteristic lines of action, which are stored in a processing computer (10), of the individual setting magnitudes, for example strip tensions, rolling speeds, for various working points, also in combination with a monitoring regulation, characterised in that thickness deviations of the foil (2) are detected at the inlet side and compensated for by a thickness preliminary control, wherein the setting magnitude, preferably the strip tensile stress, are changed in dependence on the working point by a high-dynamic setting means (13) while maintaining the other rolling parameters.
- Method according to claim 1, characterised in that the target value of the setting magnitude and the setting magnitude regulating window for restoration of the setting means into a neutral position or to a neutral value are displaced.
- Method according to claim 1, characterised in that the strip restoring tensile stress is changed in dependence on the working point by a high-dynamic supply reel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19511801A DE19511801A1 (en) | 1995-03-30 | 1995-03-30 | Method and device for thickness control in film rolling |
| DE19511801 | 1995-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0734795A1 EP0734795A1 (en) | 1996-10-02 |
| EP0734795B1 true EP0734795B1 (en) | 2000-01-26 |
Family
ID=7758235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96104291A Expired - Lifetime EP0734795B1 (en) | 1995-03-30 | 1996-03-19 | Method for feedforward thickness control in rolling of foils |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5771724A (en) |
| EP (1) | EP0734795B1 (en) |
| JP (1) | JP3697313B2 (en) |
| KR (1) | KR100394489B1 (en) |
| AT (1) | ATE189140T1 (en) |
| CA (1) | CA2173049C (en) |
| DE (2) | DE19511801A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934289A (en) * | 2009-06-30 | 2011-01-05 | 上海宝信软件股份有限公司 | Adjusting method of stainless-steel cold continuous-rolling roll gap |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100775462B1 (en) * | 2001-09-05 | 2007-11-12 | 주식회사 포스코 | Slab rolling method |
| DE102006008574A1 (en) * | 2006-02-22 | 2007-08-30 | Siemens Ag | Reducing the influence of roller excentricity on the thickness of a rolled material, comprises identifying the roller excentricity and determining a correction signal for a control unit |
| CN104324951B (en) * | 2013-07-22 | 2016-08-24 | 宝山钢铁股份有限公司 | Single chassis starts rolling force setup and control method |
| CN103801563A (en) * | 2014-01-22 | 2014-05-21 | 江苏亨特宏业重工有限公司 | Fixed roller device of aluminum foil mill |
| CN104492828A (en) * | 2014-12-27 | 2015-04-08 | 陆余圣 | Laser displacement induction device for rolling machine and using method of laser displacement induction device |
| TWI580489B (en) * | 2015-10-07 | 2017-05-01 | Metal Ind Res And Dev Centre | Sheet thickness precision control equipment |
| ITUB20169972A1 (en) * | 2016-01-14 | 2017-07-14 | Guasta Fabrizio | Aluminum foil rolling process |
| CN115971250B (en) * | 2022-10-28 | 2025-07-01 | 中色科技股份有限公司 | A reversible precision copper foil rolling production line, production process and tension control method |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU858955A1 (en) * | 1979-08-17 | 1981-08-30 | за вители А,П. Грудев, А.Д. Размахнин, К. А. Ивано|в В.Г. Шув ков, В.А. Сорокин и Г.В. Фот 5с&. ::п:;;-/7-: | Continuous rolling mill |
| JPS5650709A (en) * | 1979-09-29 | 1981-05-08 | Sumitomo Metal Ind Ltd | Preventing method for fluctuation of finished breadth in hot strip mill |
| JPS57103724A (en) * | 1980-12-19 | 1982-06-28 | Hitachi Ltd | Automatic thickness controlling system in metallic foil rolling mill |
| JPS57193216A (en) * | 1981-05-26 | 1982-11-27 | Toshiba Corp | Plate thickness controlling method of rolling mill |
| JPS5841602A (en) * | 1981-09-03 | 1983-03-10 | Sumitomo Metal Ind Ltd | Cold rolling method |
| CH663555A5 (en) * | 1984-02-06 | 1987-12-31 | Escher Wyss Ag | METHOD AND DEVICE FOR ROLLING ALUMINUM FILMS. |
| US4548063A (en) * | 1984-06-25 | 1985-10-22 | General Electric Company | Tension control in a metal rolling mill |
| IT1182868B (en) * | 1985-09-20 | 1987-10-05 | Randolph Norwood Mitchell | PROCEDURE AND EQUIPMENT FOR THE CONTINUOUS CONTROL AND / OR CORRECTION OF THE PROFILE AND FLATNESS OF METAL AND SIMILAR TAPES |
| JPH0613130B2 (en) * | 1985-10-31 | 1994-02-23 | 新日本製鐵株式会社 | Rolled plate thickness control method |
| GB8621102D0 (en) * | 1986-09-01 | 1986-10-08 | Davy Mckee Sheffield | Hot strip mill |
| JPH01181912A (en) * | 1988-01-12 | 1989-07-19 | Kawasaki Steel Corp | Rolling equipment for hard-to-work foil band |
| FR2628987A1 (en) * | 1988-03-25 | 1989-09-29 | Ugine Aciers | Metal sheet cold rolling mill - has tension system with staggered rows of rollers on either side of stand |
| JPH0246918A (en) * | 1988-08-04 | 1990-02-16 | Showa Alum Corp | Automatic control method for rolling foil or the like |
| GB8825714D0 (en) * | 1988-11-03 | 1988-12-07 | Davy Mckee Sheffield | Hot rolling of metal strip |
| EP0376887B1 (en) * | 1988-12-30 | 1993-07-14 | Alusuisse-Lonza Services Ag | Method and device for controlling the flatness of cold-rolled metal strip |
| JPH02268913A (en) * | 1989-04-06 | 1990-11-02 | Kobe Steel Ltd | Rolling mill equipped with device for absorbing variation of tension on inlet side |
| CN1040073C (en) * | 1989-12-25 | 1998-10-07 | 石川岛播磨重工业株式会社 | Thickness control system for rolling mill |
| JPH0639418A (en) * | 1992-07-22 | 1994-02-15 | Yaskawa Electric Corp | Method for controlling tension in rolling mill having automatic thickness controller |
| DE4323385C1 (en) * | 1993-07-13 | 1995-01-19 | Bwg Bergwerk Walzwerk | Method for eliminating transverse curvatures in metal strips, in particular thin metal strips up to 2.0 mm thick |
-
1995
- 1995-03-30 DE DE19511801A patent/DE19511801A1/en not_active Withdrawn
-
1996
- 1996-03-19 EP EP96104291A patent/EP0734795B1/en not_active Expired - Lifetime
- 1996-03-19 AT AT96104291T patent/ATE189140T1/en active
- 1996-03-19 DE DE59604264T patent/DE59604264D1/en not_active Expired - Lifetime
- 1996-03-29 KR KR1019960009089A patent/KR100394489B1/en not_active Expired - Fee Related
- 1996-03-29 US US08/625,730 patent/US5771724A/en not_active Expired - Lifetime
- 1996-03-29 CA CA002173049A patent/CA2173049C/en not_active Expired - Fee Related
- 1996-03-29 JP JP07712196A patent/JP3697313B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934289A (en) * | 2009-06-30 | 2011-01-05 | 上海宝信软件股份有限公司 | Adjusting method of stainless-steel cold continuous-rolling roll gap |
| CN101934289B (en) * | 2009-06-30 | 2013-12-25 | 上海宝信软件股份有限公司 | Adjusting method of stainless-steel cold continuous-rolling roll gap |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08281313A (en) | 1996-10-29 |
| CA2173049A1 (en) | 1996-10-01 |
| JP3697313B2 (en) | 2005-09-21 |
| KR960033578A (en) | 1996-10-22 |
| ATE189140T1 (en) | 2000-02-15 |
| CA2173049C (en) | 2007-06-12 |
| EP0734795A1 (en) | 1996-10-02 |
| DE59604264D1 (en) | 2000-03-02 |
| KR100394489B1 (en) | 2003-12-24 |
| US5771724A (en) | 1998-06-30 |
| DE19511801A1 (en) | 1996-10-02 |
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