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EP0329999A2 - Method and device for controlling the thickness of webs and flanges in universal rolling mill stands - Google Patents

Method and device for controlling the thickness of webs and flanges in universal rolling mill stands Download PDF

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Publication number
EP0329999A2
EP0329999A2 EP89101913A EP89101913A EP0329999A2 EP 0329999 A2 EP0329999 A2 EP 0329999A2 EP 89101913 A EP89101913 A EP 89101913A EP 89101913 A EP89101913 A EP 89101913A EP 0329999 A2 EP0329999 A2 EP 0329999A2
Authority
EP
European Patent Office
Prior art keywords
gage meter
coupling
position control
assigned
roller
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.)
Granted
Application number
EP89101913A
Other languages
German (de)
French (fr)
Other versions
EP0329999B1 (en
EP0329999A3 (en
Inventor
Wolfgang Dr. Rohde
Dieter Rosenthal
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
Schloemann Siemag AG
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Filing date
Publication date
Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0329999A2 publication Critical patent/EP0329999A2/en
Publication of EP0329999A3 publication Critical patent/EP0329999A3/en
Application granted granted Critical
Publication of EP0329999B1 publication Critical patent/EP0329999B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16Control of thickness, width, diameter or other transverse dimensions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58Roll-force control; Roll-gap control
    • B21B37/62Roll-force control; Roll-gap control by control of a hydraulic adjusting device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16Control of thickness, width, diameter or other transverse dimensions
    • B21B37/165Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B38/00Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-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
    • B21B1/08Metal-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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/088H- or I-sections
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B13/00Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/08Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process
    • B21B13/10Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane
    • B21B2013/106Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with differently-directed roll axes, e.g. for the so-called "universal" rolling process all axes being arranged in one plane for sections, e.g. beams, rails
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2203/00Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/36Spacers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B31/00Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16Adjusting or positioning rolls
    • B21B31/20Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting

Definitions

  • the invention relates to a method for web and flange thickness control of support profiles in universal stands with the horizontal and vertical rollers associated with gage meter circles and a device for carrying out this method.
  • the invention has for its object to show a method by means of which web and flange thickness errors can be optimally compensated and to develop a device for carrying out the method.
  • This task is solved procedurally by the hydraulic adjustment of each roller to its predefinable positions with at least one position control circuit each, the compensation of short-term errors via a gage meter circuit assigned to each roller by measuring the rolling forces by means of pressure actual value sensors assigned to the hydraulic adjusting cylinders and delivery of Additional setpoints resulting from force deviations between a reference force and the measured rolling force in the position control loop as the first correction variable, the detection and compensation of long-term errors by these sensors, which determine and / or specify them and / or actuator and / or by means of calculated, rolling program-dependent models and their input into the respective position control loop as a second correction variable, the specification of the degree of compensation for short-term errors (penetration) to be carried out, the coupling of the gage meter circles to one another for mutual influencing the short-term error compensation and the stipulation of the use of the coupling of the gage meter circuits with one another to completely or partially compensate for secondary short-term errors occurring during a control process, whereby material-related rolling technology
  • the use of hydraulic adjustments enables precise, quick positioning, and an overpressure safety device can also be easily implemented.
  • the coupling of the gage meter circles ensures that the ratio of web elongation to flange elongation remains within the tolerance range.
  • error corrections on the web or on the flange should affect the flange or on the web can be set via the selectable dimension of the coupling. This ensures that no secondary errors can occur. Secondary errors are to be understood here as e.g. an error correction on the web with a 100% coupling would also cause a change in the flange setting, although the flanges may be exactly true to size. In this case, changing the flange setting would result in a secondary error.
  • the attenuators in the respective gage meter circle allow the penetration to be set, ie the degree of error compensation in the corresponding gage meter circle. It can For example, it makes perfect sense to compensate for errors by only fifty percent, but thereby remaining within the tolerance range of the web-flange-elongation ratio and maintaining a dimensionally accurate profile.
  • the invention is described below with reference to a drawing.
  • the drawing shows a universal scaffold 1 and a control arrangement for the universal scaffold 1 shown as a block diagram.
  • the universal stand has horizontal rollers 2 and 3 and vertical rollers 4 and 5.
  • the horizontal roller 2 and the vertical rollers 4 and 5 can be adjusted hydraulically, while the horizontal roller 3 can only be supported mechanically by means of packages of documents, not shown.
  • Each positioning cylinder is assigned a position control loop 6, 6 ', 6 ⁇ , 6 stell.
  • the position control circuits 6, 6 ', 6 ⁇ , 6 ′′′ consist of a position transducer 7, 7', 7 ⁇ , 7 ′′′ and a position comparator 8, 8 ', 8 ⁇ , 8 ′′′ in which the measured position with a position predetermined by a position setpoint generator 31, 31 ', 31 ⁇ , 31 ′′′ is compared.
  • the output variable of the position comparator 8, 8 ', 8 ⁇ , 8 ′′′ is used to control a valve 9, 9', 9 ⁇ , 9 ′′′ via which the relevant piston-cylinder units of the hydraulic adjustment are applied.
  • the position transducers 7 ', 7 ⁇ is assigned a synchronization circuit 10, the differences zen compensates between the determined position values in order to ensure an exact adjustment of the upper horizontal roller 2.
  • the hydraulically adjustable rollers 2, 4, 5 are each assigned a gage meter circuit 11, 11 ', 11 ⁇ , 11 ′′′.
  • Each gage meter circuit 11, 11 ', 11 ⁇ , 11 ′′′ has a device for determining the rolling force, here a pressure actual value transmitter 12, 12', 12 ⁇ , 12 ′′′, an adder 13, 13 ', 13 ⁇ , 13 ′′′ , a reference rolling force memory 14, 14 ', 14 ⁇ , 14 ′′′, a multiplier 15, 15', 15 ⁇ , 15 ′′′, a stand module memory 16, 16 ', 16 ⁇ , 16 ′′′, an attenuator 17, 17 ′, 17 ⁇ , 17 ′′′, an adder 18, 18 ′, 18 ⁇ , 18 ′′′, a reference roller position memory 19, 19 ′, 19 ⁇ , 19 ′′′, a position comparator 32, 32 ′, 32 ⁇ , 32 ′′′ And an adder 20, 20 ', 20 ⁇ , 20 ′′′ on.
  • the coupling circuits 21, 21 ', 21 ⁇ , 21 ′′′ have memory coupling circuits 22, 23, 24, 25, 26, 27, in which material-dependent, rolling technology relationships are stored, which determine the degree of coupling of the gage meter circuits 11 can influence up to 11 11.
  • the effect of the gage meter circles 11 to 11 ′′′ is described below.
  • the current rolling force of the corresponding roller is measured via the actual pressure sensor 12 to 12 ′′′.
  • the signals of the pressure actual value transmitter 12 to 12 ′′′ are added with a reference force signal from the memory 14 to 14 ′′′.
  • the reference force signal can be stored in the memory by manual input into the memory or by force measurement and storage during roll tapping.
  • the output signal of the adder 13 to 13 ′′′ is divided in the multiplier 15 to 15 ′′′ by a stand module dependent on the rolling program and stored in the memory 16 to 16 ′′′ and then applied to the attenuator 17 to 17 ′′′.
  • the penetration of each gage meter circuit 11 to 11 ′′′ is adjustable via the attenuator 17 to 17 ′′′.
  • the setting can be made here manually or via a memory, not shown, in which penetration values specific to the rolling program are stored.
  • a comparison signal formed from the reference position signal and the current position signal and any manually entered correction signals are added.
  • the reference position signal can be stored in the memory 19 to 19 ′′′ via direct input or via the position detection and storage during the roll tapping.
  • the output signals of the adder 18 to 18 ′′′ is applied to the respective position comparator 8 to 8 ′′′ via the adder 20 to 20 ′′′ and here, as described above, converted into control signals.
  • the output signal of the adder 18 is simultaneously connected via the coupling circuit 21 to the adders 20 ', 20 ⁇ , 20 ′′′, while the output signal of the adder 18', 18 ⁇ via the coupling circuit 21 ', 21 ⁇ the adders 20, 20 ′′′ and that Output signals of the adder 18 ′′′ on the Coupling circuit 21 ′′′ the adders 20, 20 ', 20 ⁇ is switched on.
  • the coupling circuit 20 to 20 ′′′ consists of a memory 28 to 28 ′′′ and an adder 29 to 29 ′′′.
  • the memory 28 to 28 ′′′ is switchable in such a way that it constantly switches the output signals from the adder 18 to 18 ′′′ to the adder 29 to 29 ′′′, where these output signals are subtracted from themselves, so that at the output of the adder 29 to 29 ′′′ " 0 "is present and there is no mutual interference between the gage meter circles 11 to 11 ′′′.
  • the memory 28 to 28 jedoch can also be stopped, so that from this point in time the current output signals of the adder 18 to 18 ′′′ are subtracted from the stored signal.
  • Corresponding material-dependent coupling of the gage meter circuits 11 to 11 ′′′ will take place via the memory coupling circuits 22 to 27.
  • a measuring circuit 30 to 30 is provided, which detects the actual thickness of the flanges and web and compares it with the target values.
  • the output signals of the measuring circuit 30 to 30 ′′′ are also applied to the respective position control loop and serve to correct the employment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

Bei der Walzung von I-Trägern soll mit Steg- und Flanschdickenregelung gearbeitet werden. Dazu wird vorgeschlagen, jeder Walze des Universalgerüsts (1) einen Gage-Meter-Kreis(11,11',11'',11''') zuzuordnen. Um ein bestimmtes Verhältnis von Steglängung zu Flanschenlängung einzuhalten wird weiterhin vorgeschlagen, die Gage-Meter-Kreise miteinander einstellbar zu koppeln, wobei die Einstellung walzprogrammabhängig erfolgen soll.The web and flange thickness control should be used for the rolling of I-beams. For this purpose, it is proposed to assign a gage meter circle (11, 11 ', 11' ', 11' '') to each roller of the universal stand (1). In order to maintain a certain ratio of web elongation to flange elongation, it is further proposed to adjust the gage meter circles to one another in an adjustable manner, the setting being to be made as a function of the rolling program.

Description

Die Erfindung betrifft ein Verfahren zur Steg- und Flan­schendickenregelung von Trägerprofilen in Universalgerüsten mit den Horizontal- und Vertikalwalzen zugeordneten Gage-­Meter-Kreisen sowie eine Vorrichtung zur Durchführung dieses Verfahrens.The invention relates to a method for web and flange thickness control of support profiles in universal stands with the horizontal and vertical rollers associated with gage meter circles and a device for carrying out this method.

Bei der Walzung von Profilen, bspw. I-Profilen hat es sich gezeigt, daß Stegdicken- und/oder Flanschdickenfehler auf­treten. Bei diesen Fehlern kann es sich um Langzeitfehler, die z.B. durch den kontinuierlichen Walzenverschleiß oder durch Temperaturdehnungen der Walzen entstehen können oder aber um Kurzzeitfehler handeln, die z.B. durch Temperatur­schwankungen oder durch Materialunterschiede im zu walzenden Profil hervorgerufen werden können.When rolling profiles, for example I-profiles, it has been shown that web thickness and / or flange thickness errors occur. These errors can be long-term errors, e.g. can result from the continuous wear of the rollers or from thermal expansion of the rollers, or they are short-term errors that e.g. can be caused by temperature fluctuations or material differences in the profile to be rolled.

Bisher wurde versucht, derartige Fehler durch positionsgere­gelte mechanische Anstellungen auszuräumen. Große Fort­schritte konnten auf diese Art jedoch nicht erreicht werden, da derartige mechanische Anstellungen sehr langsam und unge­ nau arbeiten, so daß Kurzzeitfehlern kaum entgegengewirkt werden konnte. Hinzu kommt, daß bei der Walzung von I-Profi­len die Längung des Steges gegenüber der Längung der Flan­sche um 2 bis 4 % größer sein soll. Durch die oben genannten Regelungen war es bisher leicht möglich, das die Längungs­unterschiede kleiner bzw. größer ausfielen und so der Toler­anzbereich verlassen wurde, wodurch Instabilitäten der Pro­file entstanden.So far, attempts have been made to eliminate such errors by position-controlled mechanical adjustments. However, great progress could not be made in this way, since mechanical adjustments of this kind are very slow and unsafe work precisely, so that short-term errors could hardly be counteracted. In addition, when I-profiles are rolled, the lengthening of the web should be 2 to 4% greater than the lengthening of the flanges. Up to now, the above-mentioned regulations made it easy for the elongation differences to be smaller or larger, thus leaving the tolerance range, which caused instabilities in the profiles.

Es wurde weiterhin versucht, die vom Bandwalzen her bekann­ten Gage-Meter-Regelungen in Universalgerüsten einzusetzen. Auch hier wurden mechanische Anstellungen benutzt, so daß die erkannten Fehler nicht schnell genug beseitigt werden konnten. Auch hier traten Fehler durch unterschiedliche Län­gung von Steg und Flanschen auf.Attempts were also made to use the gage meter controls known from strip rolling in universal stands. Mechanical adjustments were also used here so that the detected errors could not be eliminated quickly enough. Here too, errors occurred due to the different lengthening of the web and flanges.

Der Erfindung liegt die Aufgabe zugrunde ein Verfahren auf­zuzeigen, mittels dessen Steg- und Flanschdickenfehler opti­mal kompensiert werden können sowie eine Vorrichtung zur Durchführung des Verfahrens zu entwickeln.The invention has for its object to show a method by means of which web and flange thickness errors can be optimally compensated and to develop a device for carrying out the method.

Diese Aufgabe wird verfahrensmäßig gelöst durch die hydrau­lische Anstellung jeder Walze auf ihr vorgebbare Positionen mit mindestens je einem Positions-Regelkreis, die Kompensa­tion von Kurzzeitfehlern über einen jeder Walze zugeordneten Gage-Meter-Kreis durch Messung der Walzkräfte mittels den hydraulischen Anstellzylindern zugeordneten Druckistwertge­bern und Abgabe von Zusatzsollwerten, resultierend aus Kraftabweichungen zwischen einer Referenzkraft und der ge­messenen Walzkraft in den Positions-Regelkreis als erste Korrekturgröße, die Erfassung und Kompensation von Langzeit­fehlern durch diese ermittelnde und/oder vorgebende Fühler und/oder Steller und/oder durch berechnete, walzprogrammab­hängige Modelle und deren Eingabe in den jeweiligen Positi­ons-Regelkreis als zweite Korrekturgröße, die Vorgabe des Grades der durchzuführenden Kompensation von Kurzzeitfehlern (Durchgriff), die Kopplung der Gage-Meter-Kreise untereinan­der zur gegenseitigen Beeinflussung der Kurzzeitfehler-Kom­pensation und die Vorgabe des Einsetzens der Kopplung der Gage-Meter-Kreise untereinandre zu ganzen oder teilweisen Kompensation von während eines Regelvorgangs auftretenden sekundären Kurzzeitfehlern, wobei materialabhängige walz­technische Zusammehänge bei der Kopplung aus Speicher-Kop­pelschaltkreisen abrufbar sind.This task is solved procedurally by the hydraulic adjustment of each roller to its predefinable positions with at least one position control circuit each, the compensation of short-term errors via a gage meter circuit assigned to each roller by measuring the rolling forces by means of pressure actual value sensors assigned to the hydraulic adjusting cylinders and delivery of Additional setpoints resulting from force deviations between a reference force and the measured rolling force in the position control loop as the first correction variable, the detection and compensation of long-term errors by these sensors, which determine and / or specify them and / or actuator and / or by means of calculated, rolling program-dependent models and their input into the respective position control loop as a second correction variable, the specification of the degree of compensation for short-term errors (penetration) to be carried out, the coupling of the gage meter circles to one another for mutual influencing the short-term error compensation and the stipulation of the use of the coupling of the gage meter circuits with one another to completely or partially compensate for secondary short-term errors occurring during a control process, whereby material-related rolling technology relationships can be called up when coupling from storage coupling circuits.

Die Benutzung von hydraulischen Anstellungen macht eine genaue , schnelle Positionierung möglich, zudem läßt sich eine Überdruckssicherung leicht realisieren. Durch die Kopp­lung der Gage-Meter-Kreise wird erreicht, daß das Verhältnis von Steglängung zu Flanschenlängung im Toleranzbereich bleibt. Über das wählbare Maß der Kopplung kann eingestellt werden, inwieweit Fehlerkorrekturen am Steg bzw. am Flansch auf den Flansch bzw. auf den Steg durchschlagen sollen. Dadurch wird gewährleistet, daß keine Sekundärfehler entste­hen können. Als Sekundärfehler soll hier verstanden werden, daß z.B. eine Fehlerkorrektur am Steg bei hundertprozentiger Kopplung auch eine Veränderung der Flanschenanstellung be­wirken würde, obwohl die Flansche eventuell genau maßhaltig sind. Die Veränderung der Flanschenanstellung würde in die­sem Falle einen Sekundärfehler mit sich bringen.The use of hydraulic adjustments enables precise, quick positioning, and an overpressure safety device can also be easily implemented. The coupling of the gage meter circles ensures that the ratio of web elongation to flange elongation remains within the tolerance range. To what extent error corrections on the web or on the flange should affect the flange or on the web can be set via the selectable dimension of the coupling. This ensures that no secondary errors can occur. Secondary errors are to be understood here as e.g. an error correction on the web with a 100% coupling would also cause a change in the flange setting, although the flanges may be exactly true to size. In this case, changing the flange setting would result in a secondary error.

Die Dämpfungsglieder im jeweiligen Gage-Meter-Kreis erlauben die Einstellung des Durchgriffs, d.h. das Grad der Fehler­kompensation im entsprechenden Gage-Meter-Kreis. Es kann z.B. durchaus sinnvoll sein, die Fehler nur zu fünfzig Pro­zent zu kompensieren, dadurch jedoch im Toleranzbereich des Steg-Flansch-Längungsverhältnisses zu bleiben und ein maß­haltiges Profil zu erhalten.The attenuators in the respective gage meter circle allow the penetration to be set, ie the degree of error compensation in the corresponding gage meter circle. It can For example, it makes perfect sense to compensate for errors by only fifty percent, but thereby remaining within the tolerance range of the web-flange-elongation ratio and maintaining a dimensionally accurate profile.

Die Erfindung wird nachfolgend anhand einer Zeichnung näher beschrieben. Die Zeichnung zeigt ein Universalgerüst 1 sowie als Blockschaltbild dargestellt eine Regelanordnung für das Universalgerüst 1.The invention is described below with reference to a drawing. The drawing shows a universal scaffold 1 and a control arrangement for the universal scaffold 1 shown as a block diagram.

Das Universalgerüst weist horizontale Walzen 2 und 3 sowie vertikale Walzen 4 und 5 auf. Die horizontale Walze 2 sowie die vertikalen Walzen 4 und 5 sind hydraulisch anstellbar, während die horizontale Walze 3 lediglich über nicht gezeig­te Unterlagen-Pakete abgestützt, mechanisch anstellbar ist.The universal stand has horizontal rollers 2 and 3 and vertical rollers 4 and 5. The horizontal roller 2 and the vertical rollers 4 and 5 can be adjusted hydraulically, while the horizontal roller 3 can only be supported mechanically by means of packages of documents, not shown.

Jedem Anstellzylinder ist ein Positions-Regelkreis 6, 6′, 6˝, 6‴ zugeordnet. Für die Verikaltwalzen 4, 5 ist um die Zeichnung zu vereinfachen jeweils nur ein Anstellzylinder vorgesehen, während die obere Horizontalwalze je einen An­stellzylinder pro Walzenzapfen besitzt. Die Positions-Regel­kreise 6, 6′, 6˝, 6‴ bestehen aus einem Positions-Aufneh­mer 7, 7′, 7˝, 7‴ und einem Positions-Vergleicher 8, 8′, 8˝, 8‴ in dem die gemessene Position mit einer, durch einen Positionssollwertgeber 31, 31′, 31˝, 31‴ vorgegebe­nen Position verglichen wird. Die Ausgangsgröße des Positi­ons-Vergleichers 8, 8′, 8˝, 8‴ dient zur Steuerung eines Ventils 9, 9′, 9˝, 9‴ über das die Beaufschlagung der betreffenden Kolben-Zylinder-Einheiten der hydraulischen Anstellung erfolgt. Den Positions-Aufnehmern 7′, 7˝ ist eine Synchronisationsschaltung 10 zugeordnet, die Differen­ zen zwischen den ermittelten Positionswerten ausgleicht, um eine exakte Anstellung der oberen Horizontalwalze 2 zu ge­währleisten.Each positioning cylinder is assigned a position control loop 6, 6 ', 6˝, 6 stell. For the vertical rollers 4, 5, only one positioning cylinder is provided to simplify the drawing, while the upper horizontal roller has one positioning cylinder per roll neck. The position control circuits 6, 6 ', 6˝, 6 ‴ consist of a position transducer 7, 7', 7˝, 7 ‴ and a position comparator 8, 8 ', 8˝, 8 ‴ in which the measured position with a position predetermined by a position setpoint generator 31, 31 ', 31˝, 31 ‴ is compared. The output variable of the position comparator 8, 8 ', 8˝, 8 ‴ is used to control a valve 9, 9', 9˝, 9 ‴ via which the relevant piston-cylinder units of the hydraulic adjustment are applied. The position transducers 7 ', 7˝ is assigned a synchronization circuit 10, the differences zen compensates between the determined position values in order to ensure an exact adjustment of the upper horizontal roller 2.

Den hydraulisch anstellbaren Walzen 2, 4, 5 ist weiterhin je ein Gage-Meter-Kreis 11, 11′, 11˝, 11‴ zugeordnet. Jeder Gage-Meter-Kreis 11, 11′, 11˝, 11‴ weist eine Vorrichtung zur Ermittlung der Walzkraft, hier einen Druckistwertgeber 12, 12′, 12˝, 12‴, einen Addierer 13, 13′, 13˝, 13‴, einen Referenz-Walzkraft-Speicher 14, 14′, 14˝, 14‴, einen Multiplizierer 15, 15′, 15˝, 15‴, einen Gerüstmo­dul-Speicher 16, 16′, 16˝, 16‴, ein Dämpfungsglied 17, 17′, 17˝, 17‴, einen Addierer 18, 18′, 18˝, 18‴, einen Referenz-Walzenpositions-Speicher 19, 19′, 19˝, 19‴, einen Positionsvergleicher 32, 32′, 32˝, 32‴ sowie einen Addierer 20, 20′, 20˝, 20‴ auf. Über die Addierer 20, 20′, 20˝, 20‴ und Koppelschaltungen 21, 21′, 21˝, 21‴ sind die Gage-Meter-Kreise 11, 11′, 11˝, 11‴ untereinan­der verbunden. Die Kopplungsschaltungen 21, 21′, 21˝, 21‴ weisen Speicher-Koppelkreise 22, 23, 24, 25, 26, 27 auf, in denen materialabhängige, walztechnische Zusammenhänge ge­speichert sind, die den Grad der Kopplung der Gage-Meter-­Kreise 11 bis 11‴ zu beeinflussen vermögen.The hydraulically adjustable rollers 2, 4, 5 are each assigned a gage meter circuit 11, 11 ', 11˝, 11 ‴. Each gage meter circuit 11, 11 ', 11˝, 11 ‴ has a device for determining the rolling force, here a pressure actual value transmitter 12, 12', 12˝, 12 ‴, an adder 13, 13 ', 13˝, 13 ‴ , a reference rolling force memory 14, 14 ', 14˝, 14 ‴, a multiplier 15, 15', 15˝, 15 ‴, a stand module memory 16, 16 ', 16˝, 16 ‴, an attenuator 17, 17 ′, 17˝, 17 ‴, an adder 18, 18 ′, 18˝, 18 ‴, a reference roller position memory 19, 19 ′, 19˝, 19 ‴, a position comparator 32, 32 ′, 32˝, 32 ‴ And an adder 20, 20 ', 20˝, 20 ‴ on. About the adders 20, 20 ', 20˝, 20 ‴ and coupling circuits 21, 21', 21˝, 21 ‴, the gage meter circuits 11, 11 ', 11˝, 11 ‴ are interconnected. The coupling circuits 21, 21 ', 21˝, 21 ‴ have memory coupling circuits 22, 23, 24, 25, 26, 27, in which material-dependent, rolling technology relationships are stored, which determine the degree of coupling of the gage meter circuits 11 can influence up to 11 11.

Die Wirkung der Gage-Meter-Kreise 11 bis 11‴ wird im fol­genden beschrieben. Über den Druckistwertgeber 12 bis 12‴ wird die aktuelle Walzkraft der entsprechenden Walze gemes­sen. Im Addierer 13 bis 13‴ wird das Signale des Druckist­wertgebers 12 bis 12‴ mit einem Referenz-Kraft-Signal aus dem Speicher 14 bis 14‴ addiert. Das Referenz-Kraft-Signal kann durch manuelle Eingabe in den Speicher bzw. durch die Kraftmessung und Speicherung beim Walzanstich im Speicher abgelegt werden.The effect of the gage meter circles 11 to 11 ‴ is described below. The current rolling force of the corresponding roller is measured via the actual pressure sensor 12 to 12 ‴. In the adder 13 to 13 ‴, the signals of the pressure actual value transmitter 12 to 12 ‴ are added with a reference force signal from the memory 14 to 14 ‴. The reference force signal can be stored in the memory by manual input into the memory or by force measurement and storage during roll tapping.

Das Ausgangssignal des Addierers 13 bis 13‴ wird im Multi­plizierer 15 bis 15‴ durch einen vom Walzprogramm abhängi­ge, im Speicher 16 bis 16‴ abgelegten Gerüstmodul divi­diert und anschließend dem Dämpfungsglied 17 bis 17‴ auf­geschaltet. Über das Dämpfungsglied 17 bis 17‴ ist der Durchgriff jedes Gage-Meter-Kreises 11 bis 11‴ einstell­bar. Die Einstellung kann hier manuell oder über einen nicht gezeigten Speicher, in dem walzprogramm-spezifische Durch­griffswerte abgespeichert sind, erfolgen.The output signal of the adder 13 to 13 ‴ is divided in the multiplier 15 to 15 ‴ by a stand module dependent on the rolling program and stored in the memory 16 to 16 ‴ and then applied to the attenuator 17 to 17 ‴. The penetration of each gage meter circuit 11 to 11 ‴ is adjustable via the attenuator 17 to 17 ‴. The setting can be made here manually or via a memory, not shown, in which penetration values specific to the rolling program are stored.

Im Addierer 18 bis 18‴ werden zum Ausgangssignal des Däm­pfungsgliedes 17 bis 17‴ ein aus dem Referenz-Positions­signal und dem aktuellen Positionssignal gebildeten Ver­gleichssignal sowie eventuell manuell eingebbare Korrektur­signale addiert. Das Referenz-Psoitionssignal kann über direkte Eingabe bzw. über die Positionserfassung und -spei­cherung während des Walzanstichs in den Speicher 19 bis 19‴ abgelegt werden. Das Ausgangssignale des Addierers 18 bis 18‴ wird über den Addierer 20 bis 20‴ dem jeweiligen Positionsvergleicher 8 bis 8‴ aufgeschaltet und hier, wie oben beschrieben, in Anstellsignale umgewandelt.In the adder 18 to 18 ‴ to the output signal of the attenuator 17 to 17 ‴ a comparison signal formed from the reference position signal and the current position signal and any manually entered correction signals are added. The reference position signal can be stored in the memory 19 to 19 ‴ via direct input or via the position detection and storage during the roll tapping. The output signals of the adder 18 to 18 ‴ is applied to the respective position comparator 8 to 8 ‴ via the adder 20 to 20 ‴ and here, as described above, converted into control signals.

Das Ausgangssignal des Addierers 18 wird gleichzeitig über die Koppelschaltung 21 auf die Addierer 20′, 20˝, 20‴ geschaltet, während das Ausgangssignal des Addierers 18′, 18˝ über die Koppelschaltung 21′, 21˝ den Addierern 20, 20‴ und das Ausgangssignale des Addierers 18‴ über die Koppelschaltung 21‴ den Addierern 20, 20′, 20˝ aufge­schaltet wird. Dadurch ist eine gegenseitige Beeinflussung der Gage-Meter-Kreise 11 bis 11‴ möglich.The output signal of the adder 18 is simultaneously connected via the coupling circuit 21 to the adders 20 ', 20˝, 20 ‴, while the output signal of the adder 18', 18˝ via the coupling circuit 21 ', 21˝ the adders 20, 20 ‴ and that Output signals of the adder 18 ‴ on the Coupling circuit 21 ‴ the adders 20, 20 ', 20˝ is switched on. This makes it possible for the gage meter circles 11 to 11 ‴ to influence one another.

Die Kopplungsschaltung 20 bis 20‴ besteht aus einem Spei­cher 28 bis 28‴ und einem Addierer 29 bis 29‴. Der Spei­cher 28 bis 28‴ ist derart schaltbar, daß er ständig die Ausgangssignale vom Addierer 18 bis 18‴ auf den Addierer 29 bis 29‴ schaltet, wo diese Ausgangssignale von sich selbst subtrahiert werden, so das am Ausgang des Addierers 29 bis 29‴ "0" ansteht, und keine gegenseitige Beeinflus­sung der Gage-Meter-Kreise 11 bis 11‴ erfolgt. Der Spei­cher 28 bis 28‴ kann jedoch auch gestoppt werden, so daß von diesem Zeitpunkt an von dem gespeicherten Signal die aktuellen Ausgangssignale des Addierers 18 bis 18‴ subtra­hiert werden. Über die Speicher-Koppelkreise 22 bis 27 wird eine entsprechende materialabhängige Koppelung der Gage-Me­ter-Kreise 11 bis 11‴ erfolgen.The coupling circuit 20 to 20 ‴ consists of a memory 28 to 28 ‴ and an adder 29 to 29 ‴. The memory 28 to 28 ‴ is switchable in such a way that it constantly switches the output signals from the adder 18 to 18 ‴ to the adder 29 to 29 ‴, where these output signals are subtracted from themselves, so that at the output of the adder 29 to 29 ‴ " 0 "is present and there is no mutual interference between the gage meter circles 11 to 11 ‴. However, the memory 28 to 28 jedoch can also be stopped, so that from this point in time the current output signals of the adder 18 to 18 ‴ are subtracted from the stored signal. Corresponding material-dependent coupling of the gage meter circuits 11 to 11 ‴ will take place via the memory coupling circuits 22 to 27.

Zur Langzeitfehlererfassung ist ein Meßkreis 30 bis 30‴ vorgesehen, der die tatsächliche Dicke von Flanschen und Steg erfaßt und mit den Sollwerten vergleicht. Die Ausgangs­signale des Meßkreises 30 bis 30‴ werden ebenfalls dem jeweiligen Positions-Regelkreis aufgeschaltet und dienen zur Korrektur der Anstellung.For long-term error detection, a measuring circuit 30 to 30 fehler is provided, which detects the actual thickness of the flanges and web and compares it with the target values. The output signals of the measuring circuit 30 to 30 ‴ are also applied to the respective position control loop and serve to correct the employment.

BezugszeichenübersichtReference symbol overview

  • 1 Universalgerüst1 universal scaffold
  • 2 Horizontalwalze2 horizontal roller
  • 3 Horizontalwalze3 horizontal roller
  • 4 Vertikalwalze4 vertical roller
  • 5 Vertiikalwalze5 vertical roller
  • 6 Positions-Regelkreis6 position control loop
  • 7 Positionsaufnehmer7 position sensors
  • 8 Positionsvergleicher8 position comparators
  • 9 Ventil9 valve
  • 10 Sychronisationsschaltung10 synchronization circuit
  • 11 Gage-Meter-Kreis11 Gage meter circle
  • 12 Druckistwertgeber12 pressure actual value transmitter
  • 13 Addierer13 adders
  • 14 Speicher (Referenz-Walzkraft)14 memory (reference rolling force)
  • 15 Multiplizierer15 multipliers
  • 16 Speicher (Gerüstmodul)16 memories (scaffolding module)
  • 17 Dämpfungsglied17 attenuator
  • 18 Addierer18 adders
  • 19 Speicher (Referenz-Walzposition)19 memory (reference rolling position)
  • 20 Addierer20 adders
  • 21 Kopplungsschaltung21 coupling circuit
  • 22 - 27 Speicher-Koppelkreise22 - 27 memory coupling circuits
  • 28 Speicher28 memories
  • 29 Addierer,29 adders,
  • 30 Meßkreis30 measuring circuit
  • 31 Positionssollwertgeber31 Position setpoint device
  • 32 Positionsvergleicher32 position comparators

Claims (4)

1. Verfahren zur Steg- und Flanschdickenregelung von Träger­profilen in einem Universalgerüst mit den Horizontal- sowie den Vertikalwalzen zugeordneten Gage-Meter-Kreisen,
gekennzeichnet durch
die hydraulische Anstellung jeder Walze (2, 3, 4, 5) auf ihr vorgebbare Positionen mit mindestens je einem Positi­ons-Regelkreis (6, 6′,6˝, 6‴),
die Kompensation von Kurzzeitfehlern über einen jeder Walze (2, 3, 4, 5) zugeordneten Gage-Meter-Kreis (11, 11′, 11˝, 11‴) durch Messung der Walzkräfte mittels den hydraulischen Anstellzylindern zugeordneten Druckist­wertgebern (12, 12′, 12˝, 12‴) und Abgabe von Zusatz­sollwerten resultierend aus Kraftabweichungen zwischen einer Referenzkraft und der gemessenen Walzkraft in den Positionsregelkreis (6, 6′, 6˝, 6‴) als erste Korrek­turgröße,
die Erfassung und Kompensation von Langzeitfehlern durch diese ermittelnde und/oder vorgebende Fühler und/oder Steller und/oder durch berechnete, walzprogrammabhängige Modelle und deren Eingabe in den jeweiligen Positionsre­gelkreis (6, 6′, 6˝, 6‴)als zweite Korrekturgröße,
die Vorgabe des Grades der durchzuführenden Kompensation von Kurzzeitfehlern (Durchgriff),
die Kopplung der Gage-Meter-Kreise (11, 11′, 11˝, 11‴) untereinander zur gegenseitigen Beeinflussung der Kurz­zeitfehler-Kompensation und die Vorgabe des Einsetzens der Kopplung der Gage-Meter-Kreise (11, 11′, 11˝, 11‴) untereinander zur ganzen oder teilweisen Kompensation von während eines Regelvorgangs auftretenden sekundären Kurz­zeitfehlern, wobei materialabhängige, walztechnische Zusammenhänge bei der Kopplung der Gage-Meter-Kreise (11, 11′, 11˝, 11‴) untereinander aus Speicher-Koppel­schaltkreisen (22 bis 27) abrufbar sind.
1. Method for web and flange thickness control of carrier profiles in a universal stand with the horizontal and vertical rollers assigned gage meter circles,
marked by
the hydraulic adjustment of each roller (2, 3, 4, 5) to its predefinable positions with at least one position control circuit (6, 6 ′, 6˝, 6 ‴),
the compensation of short-term errors via a gage meter circuit (11, 11 ′, 11˝, 11 ‴) assigned to each roller (2, 3, 4, 5) by measuring the rolling forces by means of the pressure actual value sensors (12, 12 ′) assigned to the hydraulic adjusting cylinders , 12˝, 12 ‴) and delivery of additional setpoints resulting from force deviations between a reference force and the measured rolling force in the position control loop (6, 6 ′, 6˝, 6 ‴) as the first correction variable,
the detection and compensation of long-term errors by these determining and / or specifying sensors and / or actuators and / or by calculated, rolling program-dependent models and their input in the respective position control loop (6, 6 ′, 6˝, 6 ‴) as a second correction variable,
the specification of the degree of compensation for short-term errors (penetration),
the coupling of the gage meter circles (11, 11 ′, 11˝, 11 ‴) to one another for mutual influencing of the short-term error compensation and the specification of the use of the coupling of the gage meter circles (11, 11 ′, 11˝, 11 ‴) with each other for the complete or partial compensation of secondary short-term errors occurring during a control process, whereby material-dependent, rolling technology relationships when coupling the gage meter circuits (11, 11 ', 11˝, 11 ‴) with each other from memory coupling circuits (22 to 27) are available.
2. Universalgerüst zur Durchführung des Verfahrens nach Anspruch 1,
dadurch gekennzeichnet,
daß jeder Walze (2, 3, 4, 5) mindestens ein Positionsre­gelkreis (6, 6′, 6˝, 6‴) für die hydraulischen Anstell­zylinder zugeordnet ist,
daß jeder Walze (2, 3, 4, 5) ein Gage-Meter-Kreis zuge­ordnet ist, der den entsprechenden Positionsregelkreisen (6, 6′, 6˝, 6‴) überlagert ist,
daß mindestens ein Meßkreis (30, 30′, 30˝, 30‴) zur Langzeitfehler-Erfassung und Kompensation vorgesehen ist, dessen Ausgangsgrößen ebenfalls auf den Positionsregel­kreis (6, 6′, 6˝, 6‴) wirken,
daß jeder Gage-Meter-Kreis (11, 11′, 11˝, 11‴) ein Dämpfungsglied (17, 17′, 17˝, 17‴) zur Einstellung des Durchgriffs aufweist,
daß zwischen den einzelnen Gage-Meter-Kreisen (11, 11′, 11˝, 11‴) Koppelschaltungen (21, 21′, 21˝, 21‴) vorgesehen sind, die eine gegenseitige Beeinflussung der Gage-Meter-Kreise (11, 11′, 11˝, 11‴) erlauben, und daß der Grad der Kopplung sowie der Einsatzzeitpunkt der Kopplung vorgebbar ist, um sekundäre Kurzzeitfehler optimal zu kompensieren.
2. universal scaffold for performing the method according to claim 1,
characterized,
that each roller (2, 3, 4, 5) is assigned at least one position control loop (6, 6 ', 6˝, 6 ‴) for the hydraulic adjusting cylinders,
that each roller (2, 3, 4, 5) is assigned a gage meter circuit, which is superimposed on the corresponding position control circuits (6, 6 ', 6˝, 6 ‴),
that at least one measuring circuit (30, 30 ', 30˝, 30 ‴) is provided for long-term error detection and compensation, the output variables of which also act on the position control loop (6, 6', 6˝, 6 ‴),
that each gage meter circle (11, 11 ', 11˝, 11 ‴) has an attenuator (17, 17', 17˝, 17 ‴) for adjusting the penetration,
that coupling circuits (21, 21 ', 21˝, 21 ‴) are provided between the individual gage meter circles (11, 11', 11˝, 11 ‴), which mutually influence the gage meter circles (11, 11 ', 11˝, 11 ‴) allow, and that the degree of coupling and the time of use of the coupling can be specified in order to optimally compensate for secondary short-term errors.
3. Universalgerüst nach Anspruch 2,
dadurch gekennzeichnet,
daß der oberen Horizontalwalze (2) und den beiden Verti­kalwalzen (4, 5) getrennte Positionsregelkreise (6, 6′, 6˝, 6‴) und Gage-Meter-Kreise (11, 11′, 11˝, 11‴) zugeordnet sind, während die untere Horizontalwalze (3) bspw. vermittels Beilagen mechanisch anstellbar gelagert ist.
3. universal scaffold according to claim 2,
characterized,
that the upper horizontal roller (2) and the two vertical rollers (4, 5) separate position control loops (6, 6 ', 6˝, 6 ‴) and gage meter circles (11, 11', 11˝, 11 ‴) are assigned , while the lower horizontal roller (3) is, for example, mechanically adjustable by means of inserts.
4. Universalgerüst nach Anspruch 2,
dadurch gekennzeichnet,
daß den Horizontalwalzen (2, 3) und den Vertikalwalzen (4, 5) paarweise die Positionsregelkreise und Gage-Meter-­Kreise zugeordnet sind.
4. universal scaffold according to claim 2,
characterized,
that the horizontal rollers (2, 3) and the vertical rollers (4, 5) are assigned in pairs to the position control loops and gage meter circles.
EP89101913A 1988-02-26 1989-02-03 Method and device for controlling the thickness of webs and flanges in universal rolling mill stands Expired - Lifetime EP0329999B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3806063 1988-02-26
DE3806063A DE3806063C2 (en) 1988-02-26 1988-02-26 Method and device for web and flange thickness control in universal scaffolding

Publications (3)

Publication Number Publication Date
EP0329999A2 true EP0329999A2 (en) 1989-08-30
EP0329999A3 EP0329999A3 (en) 1991-09-11
EP0329999B1 EP0329999B1 (en) 1994-08-31

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EP89101913A Expired - Lifetime EP0329999B1 (en) 1988-02-26 1989-02-03 Method and device for controlling the thickness of webs and flanges in universal rolling mill stands

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US (1) US5000020A (en)
EP (1) EP0329999B1 (en)
JP (1) JP2529730B2 (en)
KR (1) KR960006018B1 (en)
CN (1) CN1028843C (en)
AT (1) ATE110599T1 (en)
DE (2) DE3806063C2 (en)
ES (1) ES2060677T3 (en)

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WO1993010921A1 (en) * 1991-11-25 1993-06-10 Sundwiger Eisenhütte Maschinenfabrik Gmbh & Co. Control device for positioning the superstructure of a four-column roll stand

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US5085067A (en) * 1989-05-24 1992-02-04 Sms Schloemann-Siemag Aktiengesellschaft Method and arrangement for automatically aligning a universal rolling mill stand after the stand has been changed to new types of sections
WO1993010921A1 (en) * 1991-11-25 1993-06-10 Sundwiger Eisenhütte Maschinenfabrik Gmbh & Co. Control device for positioning the superstructure of a four-column roll stand

Also Published As

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ATE110599T1 (en) 1994-09-15
JPH01254306A (en) 1989-10-11
DE3806063A1 (en) 1989-09-07
EP0329999B1 (en) 1994-08-31
US5000020A (en) 1991-03-19
CN1028843C (en) 1995-06-14
EP0329999A3 (en) 1991-09-11
ES2060677T3 (en) 1994-12-01
DE3806063C2 (en) 1996-10-17
JP2529730B2 (en) 1996-09-04
DE58908248D1 (en) 1994-10-06
KR960006018B1 (en) 1996-05-08
CN1036716A (en) 1989-11-01
KR890012713A (en) 1989-09-19

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