EP0372439A2 - Méthode de commande de processus pour un train de laminage continu - Google Patents

Méthode de commande de processus pour un train de laminage continu Download PDF

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Publication number
EP0372439A2
EP0372439A2 EP89122265A EP89122265A EP0372439A2 EP 0372439 A2 EP0372439 A2 EP 0372439A2 EP 89122265 A EP89122265 A EP 89122265A EP 89122265 A EP89122265 A EP 89122265A EP 0372439 A2 EP0372439 A2 EP 0372439A2
Authority
EP
European Patent Office
Prior art keywords
speed
caliber
control method
roll
stand
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.)
Withdrawn
Application number
EP89122265A
Other languages
German (de)
English (en)
Other versions
EP0372439A3 (fr
Inventor
Hans Dieter Grote
Winfried Bleckmann
Ewald Probst
Michael Dansauer
Gerald Dr. Krüger
Ernst Wild
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.)
ABB AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0372439A2 publication Critical patent/EP0372439A2/fr
Publication of EP0372439A3 publication Critical patent/EP0372439A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/18—Automatic gauge control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/24—Roll wear

Definitions

  • the invention relates to a process control method for a continuous rolling mill according to the preamble of the independent claims 1 and 10.
  • Such a process control method for a continuous rolling mill is known from EP-PS 00 04 598.
  • the speed of the rolling stock on the outlet side of a roll stand and the peripheral speed or the speed of the roll of this roll stand are measured, and a mathematical link value from these two values is used as a reference variable for controlling a predetermined longitudinal force.
  • the object of the invention is to provide a process control method for a continuous rolling mill of the type mentioned at the outset, which enables the current working caliber diameter and the caliber wear to be recognized automatically.
  • the electric motors 10 and 11 and 12 are fed in a speed-controlled manner via converters 16 and 17 and 18, respectively.
  • n1 or n2 or n3 (generally ni) of the electric motors 10 or 11 or 12
  • speed detection devices 19 or 20 or 21 can be coupled to the motors.
  • Photocells 22, 23 and 24 are arranged at the inlet of a roll stand 1, 2 and 3, respectively.
  • Another photocell 36 is located at a predetermined distance from the roll stand.
  • the distances between the photocells 22, 23, 24, 36 are designated L1, L2, L3 (generally Li).
  • the distances between roll stand 1 and photocell 23 or between roll stand 2 and photocell 24 or between roll stand 3 and photocell 36 are designated LA1 or LA2 or LA3 (generally LAi).
  • the distances between photocell 2 and roll stand 1 or between photocell 23 and roll stand 2 or between photocell 24 and roll stand 3 are denoted by LE1 or LE2 or LE3 (generally LEi).
  • the tapping of the rolling stock 26 into a roll stand 1 or 2 or 3 is preferably detected via the current increase in the motor 10 or 11 or 12 and the corresponding point in time t1 or t2 or t3 or t4 (generally ti) becomes one Evaluation device 25 fed.
  • photocells 33, 34, 35 (indicated by dashed lines) for detecting the tapping of the rolling stock between the roll stands (in each case at the roll stand outlet) can be arranged if the tapping of the rolling stock by means of current determination is not possible with sufficient accuracy.
  • the evaluation device 25 is further the distances LE1, LE2, LE3 (generally LEi) between the roll stands and the individual preceding photocells 22, 23, 24, the distances L1, L2, L3 (generally Li) between the photocells 22, 23, 24, 36 or instead of L1, L2, L3, the distances LA1, LA2, LA3 between the roll stands and the subsequent photocells 23, 24, 36, the transmission gear ratios üi and the current drive speeds n1, n2, n3 (generally ni) are supplied or entered.
  • the drive speeds n1, n2, n3 (ni) can be determined by the speed detection devices 19, 20, 21 (or in the simplest case, the current drive speed setpoints of the converter control are used).
  • Evaluation device 25 also with calculated setpoints for the rod speeds v1 *, v2 *, v3 * (vi *), with calculated setpoints for the drive speeds n1 *, n2 *, n3 * (ni *) and with calculated working caliber diameter setpoints (which of the Speed calculation) D1 *, D2 *, D3 * (Di *) supplied.
  • the evaluation device 25 calculates, inter alia, the current bar speed (rolling speed) v1, v2, v3 (vi) of the rolling stock 26 between the roll stands and the current working caliber diameter D1, D2, D3, Di, as will be explained in detail below.
  • the evaluation device 25 calculates the current working caliber diameter Di according to the equation where ni ⁇ üi represent the roll speeds n1 ⁇ ü1, n2 ⁇ ü2, n3 ⁇ ü3 and the lead is already included in the working roll diameter.
  • the evaluation device 25 receives the target values for the entire rolling mill.
  • the detection or calculation of the working caliber diameter begins, in that for each roll stand and at each bar start, the current bar speeds (rolling speeds) vi according to equation (2) and those over the same period between ti and t (i + 1) averaged roll speeds ni ⁇ üi are recorded. For each pair of values, consisting of averaged bar speed vi and averaged roller speed ni ⁇ üi, the current working caliber diameter Di is calculated according to equation (1).
  • the evaluation device 25 may have to be informed of the condition of the calibers of the rollers at the time of use in order to be able to track the wear of the calibers. Likewise, the evaluation device 25 must be informed of a change in caliber before the rolling starts with the new caliber.
  • the evaluation device 25 After the start of rolling for a new rolling program, the evaluation device 25 must be informed when the rolling train has run in. This is done either by an operator signal or automatically, for example after the first bars of the new rolling program have been rolled.
  • the caliber diameters detected at this point in time and calculated according to equation (1) are stored as reference caliber diameters D01, D02, D03, D0i.
  • the drive speeds present at this point in time are stored as reference drive speeds n01, n02, n03, n0i and the present rod speeds as reference rod speeds v01, v02, v03, voi. In order to obtain sufficiently reliable reference values, averages are taken over several measurements.
  • the operator is signaled by the evaluation device 25 that the corresponding calibers are worn out .
  • the operator can continuously view the calculated caliber diameter setpoints Di *, the reference caliber diameter D0i, the current working caliber diameter Di and the wear separately for each roll stand, each roller and each caliber in the display unit of the operating station recall.
  • the rolling stock 26 can be rolled into different calibers 27, 28, 29.
  • a moving average is expediently formed over several caliber wear measured values.
  • a decrease in the quotient vi / ni by a certain percentage corresponds to a decrease in the radius of the rollers by the same percentage. This decrease in radius corresponds to roller wear.
  • FIG. 3 shows the principle of determining the bar speed from the inlet and outlet speed.
  • a scaffold i and a scaffold i + 1 can be seen.
  • Three photocells 30, 31, 32 can be seen, the photocells 30, 31 in front of the framework i + 1 and the photocell 32 being arranged after this framework.
  • the rolling stock (rod) passes through the measuring section L E (i + 1) + L A (i + 1) , which extends on both sides of the stand i + 1.
  • the first part of the measuring section L E (i + 1) is traversed with the exit speed v i of the roughing stand and the section L A (i + 1) with the exit speed v (i + 1) .
  • the speed vi must be known exactly (outfeed speed of the roughing stand). It is measured, for example, by means of the upstream calibration path L Mi using the method explained in FIG. 1.
  • the bar speed must be known exactly for one of the roll stands.
  • a framework i-1 and a framework i can be seen.
  • dDi (%) (1-nb / ni) 100 (20)
  • a direct speed measurement of the rolling stock can also be used (e.g. wheel on rolling stock, Doppler method).
  • roller wear results in an increasing outlet cross-section.
  • the stitch decrease ⁇ decreases.
  • the roll wear can also be monitored by measuring the pass ⁇ .
  • viQi v (i + 1) Q (i + 1) (22) the stitch decrease ⁇ can be measured from the measurement of the speed of the rolling stock in front of and behind the stand.
  • the stitch decrease ⁇ is particularly suitable as a measure of roll wear if there is a constant inlet cross-section and the roll position is not changed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
EP19890122265 1988-12-08 1989-12-02 Méthode de commande de processus pour un train de laminage continu Withdrawn EP0372439A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3841367 1988-12-08
DE3841367A DE3841367A1 (de) 1988-12-08 1988-12-08 Prozessleitverfahren fuer eine kontinuierliche walzstrasse

Publications (2)

Publication Number Publication Date
EP0372439A2 true EP0372439A2 (fr) 1990-06-13
EP0372439A3 EP0372439A3 (fr) 1992-12-02

Family

ID=6368734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890122265 Withdrawn EP0372439A3 (fr) 1988-12-08 1989-12-02 Méthode de commande de processus pour un train de laminage continu

Country Status (3)

Country Link
EP (1) EP0372439A3 (fr)
KR (1) KR900009157A (fr)
DE (1) DE3841367A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229323A1 (de) * 1992-09-02 1994-03-10 Thyssen Edelstahlwerke Ag Drehzahlregelung der Gerüste einer Warmwalzstraße
EP0840245A2 (fr) * 1996-10-29 1998-05-06 Morgan Construction Company Système et méthode pour optimiser l'inventaire de cylindres d'un laminoir
CN112157126A (zh) * 2020-09-01 2021-01-01 山东钢铁集团日照有限公司 一种降低辊道磨损的控制方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4443210A1 (de) * 1994-12-05 1996-06-13 Krupp Polysius Ag Verfahren und Vorrichtung zur Bestimmung des Verschleißes am Umfang eines zylindrischen Körpers
KR20010011378A (ko) * 1999-07-27 2001-02-15 임성순 합성섬유의 제조방법
CN108941203B (zh) * 2018-05-24 2020-03-20 首钢智新迁安电磁材料有限公司 一种轧机的末期轧辊及其应用方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1156998A (en) * 1966-09-15 1969-07-02 Asea Ab An Improved Rolling Mill and Method of Operating it
DE1452051A1 (de) * 1964-06-30 1969-07-10 Schloemann Ag Steuerung von zwei oder mehr Walzgeruesten,insbesondere zum Walzen von Profilen
DE2217423A1 (de) * 1972-04-12 1973-10-25 Rolf Herrmann Verfahren zur ermittlung der streckung und des arbeitenden walzendurchmessers in kontinuierlichen profilwalzwerken
EP0004598A2 (fr) * 1978-04-10 1979-10-17 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Procédé et circuit pour la commande de la tension entre les cages d'un laminoir continu à entraînement individuel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1507987A (en) * 1974-07-15 1978-04-19 British Steel Corp Mill stand roll parameter monitor
JPS60102220A (ja) * 1983-11-07 1985-06-06 Mitsubishi Electric Corp タンデム圧延制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1452051A1 (de) * 1964-06-30 1969-07-10 Schloemann Ag Steuerung von zwei oder mehr Walzgeruesten,insbesondere zum Walzen von Profilen
GB1156998A (en) * 1966-09-15 1969-07-02 Asea Ab An Improved Rolling Mill and Method of Operating it
DE2217423A1 (de) * 1972-04-12 1973-10-25 Rolf Herrmann Verfahren zur ermittlung der streckung und des arbeitenden walzendurchmessers in kontinuierlichen profilwalzwerken
EP0004598A2 (fr) * 1978-04-10 1979-10-17 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Procédé et circuit pour la commande de la tension entre les cages d'un laminoir continu à entraînement individuel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BBC NACHRICHTEN. Nr. 8, 1979, MANNHEIM DE Seiten 274 - 282 E.PROBST ET AL. 'Längskraftkontolliertes Walzen' *
FACHBERICHTE HÜTTENPRAXIS METALLWEITERVERARBEITUNG Bd. 22, Nr. 2, 1984, Seiten 100 - 105 W.BLECKMANN 'Leittechnik in Kontistrassen' *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229323A1 (de) * 1992-09-02 1994-03-10 Thyssen Edelstahlwerke Ag Drehzahlregelung der Gerüste einer Warmwalzstraße
EP0840245A2 (fr) * 1996-10-29 1998-05-06 Morgan Construction Company Système et méthode pour optimiser l'inventaire de cylindres d'un laminoir
EP0840245A3 (fr) * 1996-10-29 1999-05-19 Morgan Construction Company Système et méthode pour optimiser l'inventaire de cylindres d'un laminoir
CN112157126A (zh) * 2020-09-01 2021-01-01 山东钢铁集团日照有限公司 一种降低辊道磨损的控制方法

Also Published As

Publication number Publication date
DE3841367A1 (de) 1990-06-13
KR900009157A (ko) 1990-07-02
EP0372439A3 (fr) 1992-12-02

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