EP0439663B1 - Procédé de commande d'un laminoir continu à plusieurs cages - Google Patents

Procédé de commande d'un laminoir continu à plusieurs cages Download PDF

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Publication number
EP0439663B1
EP0439663B1 EP90102109A EP90102109A EP0439663B1 EP 0439663 B1 EP0439663 B1 EP 0439663B1 EP 90102109 A EP90102109 A EP 90102109A EP 90102109 A EP90102109 A EP 90102109A EP 0439663 B1 EP0439663 B1 EP 0439663B1
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EP
European Patent Office
Prior art keywords
rolling
mill
tension
value
values
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP90102109A
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German (de)
English (en)
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EP0439663A1 (fr
Inventor
Roland Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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.)
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Publication date
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Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to ES199090102109T priority Critical patent/ES2046545T3/es
Priority to EP90102109A priority patent/EP0439663B1/fr
Priority to AT90102109T priority patent/ATE97838T1/de
Priority to DE90102109T priority patent/DE59003705D1/de
Priority to FI910011A priority patent/FI93805C/fi
Priority to JP3032293A priority patent/JPH04220109A/ja
Publication of EP0439663A1 publication Critical patent/EP0439663A1/fr
Publication of EP0439663B1 publication Critical patent/EP0439663B1/fr
Application granted granted Critical
Anticipated expiration legal-status Critical
Revoked 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
    • B21B37/48—Tension control; Compression control
    • B21B37/52—Tension control; Compression control by drive motor control

Definitions

  • the invention relates to a method for controlling a continuous, multi-stand rolling mill, in particular a steel mill, whereby, depending on the armature currents of the rolling motors in the individual stands, before and after tapping the rolling stock in the subsequent stands, additional speed setpoints are generated according to a predetermined calculation rule, and the The speeds of the individual stands are controlled via the additional speed setpoints in the sense of a minimum tension control.
  • Such a method is known from AEG-Mitannonen, 56, (1966), No. 1, pages 54-57, or Technische Mitteilungen AEG-TELEFUNKEN, 66 (1976), No. 6, pages 255-261, under the name minimum tension control .
  • a scanning system can also be provided which, in the time between the tapping of two successive stands, only executes a single actuating step for adapting the speed to the change in the motor current before and after tapping. This should enable a draft and pressure-free rolling. With a single setting step for speed adjustment between two successive stands, however, a more or less high residual error is to be expected, which is why several successive setting steps between two taps are aimed for. However, high throughput speeds prevent this.
  • the additional speed setpoints are additionally generated as a function of a tensile current setpoint, which is predetermined as empirical value in the form of a specific setpoint tension in the rolling stock.
  • the predetermined tensile tension prevents the occurrence of compressive forces in the rolling stock.
  • the individual roll stands are denoted by 1 and an index.
  • the symbolically represented rolling stock passes through one after the other in the direction of the arrow.
  • the minimum tension control by the control device 2 is shown in this example between the roll stands 1 m and 1 m + 1 .
  • the armature current J A1 and J A2 is measured on the roll stand 1 m and is supplied to the control device 2 via the signal path 12.
  • the additional speed setpoint n * Z % determined and given to the scaffold 1 m + 1 via signal path 13.
  • the lead time of the Rolled material between the stands 1 m and 1 m + 1 is divided into a calming time t A1 for regulating the tapping in the stand 1 m and a safety time t S1 , the setpoint change for the following stand 1 m + 1 being determined after the calming time t A1 .
  • the control direction can also run according to the dashed line 14, that is to say in the opposite direction.
  • the individual stands are adjusted at high rolling stock speeds, for example in the case of rolling head times from stand to stand under one to two seconds, in such a way that the additional speed setpoint n * Z % is not changed until the next rolling pass.
  • the control cycle therefore extends from rod to rod.
  • FIG. 2 in which the rolling stands are denoted by 1 n , the arrangement and mode of operation of the control device 2 is in principle corresponding to FIG. 1, but here the next following stand 1 n + 1 is already influenced during the same pass through the rolling stock.
  • the tapping of stand 1 n is first corrected in a calming time t A1
  • the current value J A2 is stored in control device 2 n-1 and an adjustment is carried out.
  • the resulting renewed load current is corrected in the calming time t B1 and the current J A1 is stored for the calculations of the minimum draft control 2 n .
  • a safety time t S1 is also provided here, which avoids a time overlap.
  • 2 also designates the control device according to the invention, in the computer part 2 'of which a rolling path replica is included as a model. Furthermore, the control device 2 has a setpoint setting part 2 ′′ in which the speed setpoint n * is formed, the signal of which is designated by 11. 2 '''denotes the parameter input unit of the control device 2, to which signals from a keyboard or a monitor are applied via the signal path 8. The replica of the rolling stock is entered via various photo cells etc. via signal path 9, the respective position of the rolling stock.
  • the computer 2 can enter the armature currents J A1 , J A2 , which are input via the preferably six-pole Butterworth filter 10, divided into the closed state and the tensile state, into the memories 3 and 4 in a position-related manner.
  • the signals of the armature currents J A1 , J A2 for the draft-free and the tensile state reach the difference-forming device 5, which also contains the tension current setpoint ⁇ J * A , an empirical value that is dependent on the speed and rolling program is entered from parameter input 2 '''.
  • the traction current error is determined from this data and, together with the empirical value K E, fed to the multiplier 6, in which the speed setpoint n * Z % is formed.
  • the transfer unit which ensures that the signal is formed as a function of the speed in a rolling gap or when the rod is running as shown in FIG. 2 as an adjustment command via the setpoint adjuster 2 ′′ as setpoint n *, is designated by 7.
  • the units 3, 4, 5, 6 and 7 together form the computing part of the control device 2 for the continuous determination and timely delivery of the speed setpoint n *.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Feedback Control In General (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Claims (6)

  1. Procédé pour commander un laminoir continu à plusieurs cages, notamment un laminoir pour barres, selon lequel, en fonction des courants d'induit (JA1, JA2) des moteurs du laminoir, des valeurs de consigne supplémentaires de la vitesse de rotation (n*Z%) sont produites, selon une règle de calcul prédéterminée, dans les différentes cages (m;n) en amont et en aval de l'insertion du produit à laminer dans les cages respectives suivantes (m+1;n+1), et selon lequel les vitesses de rotation des différentes cages sont commandées par l'intermédiaire des valeurs de consigne supplémentaires de la vitesse de rotation (n*Z%), dans le sens du réglage de la traction minimale,
    caractérisé par le fait que les valeurs de consigne supplémentaires de la vitesse de rotation (n*Z%) sont produites en supplément en fonction d'une valeur de consigne (D J*A) du courant de tirage, qui est prédéterminée en tant que valeur empirique sous la forme d'une traction de consigne spécifique (σ*AZ) dans le produit à laminer.
  2. Procédé suivant la revendication 1, caractérisé par le fait que les valeurs de consigne supplémentaires de la vitesse de rotation (n*Z%) sont formées selon la règle de calcul N* Z % = K E . (J AL -J A2 - D J A *)
    Figure imgb0026
     , KE étant une valeur empirique mémorisée.
  3. Procédé suivant la revendication 2, caractérisé par le fait que la valeur empirique KE est formée sous la forme d'une variation en pourcentage de la vitesse de rotation pour chaque N/mm².
  4. Procédé suivant la revendication 2 ou 3, caractérisé par le fait que la valeur empirique KE est à nouveau prédéterminée après les déplacements de commande, qui dépassent des valeurs limites.
  5. Procédé suivant l'une des revendications précédentes, caractérisé par le fait que la valeur de consigne (Δ JA*) du courant de tirage est formée conformément à la relation
    Figure imgb0027
     d'après la traction spécifique prédeterminéei σ*AZ, AA représentant la section transversale de sortie du produit laminé en mm², dW le diamètre des cylindres en mm, n* la valeur de consigne de la vitesse de rotation tr/mn, JN le courant d'induit du moteur du laminoir en A, i le rapport de transmission et PN la puissance nominale du moteur en kW.
  6. Procédé suivant l'une des revendications précédentes, caractérisé par le fait que la valeur de consigne (Δ JA*) du courant de tirage est déterminée sur la base de tolérances de valeurs réelles de traction, sur plusieurs passes non réglées.
EP90102109A 1990-02-02 1990-02-02 Procédé de commande d'un laminoir continu à plusieurs cages Revoked EP0439663B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ES199090102109T ES2046545T3 (es) 1990-02-02 1990-02-02 Instalacion de control para un tren de laminacion continuo de varios bastidores.
EP90102109A EP0439663B1 (fr) 1990-02-02 1990-02-02 Procédé de commande d'un laminoir continu à plusieurs cages
AT90102109T ATE97838T1 (de) 1990-02-02 1990-02-02 Verfahren zum steuern einer kontinuierlichen, mehrgeruestigen walzstrasse.
DE90102109T DE59003705D1 (de) 1990-02-02 1990-02-02 Verfahren zum Steuern einer kontinuierlichen, mehrgerüstigen Walzstrasse.
FI910011A FI93805C (fi) 1990-02-02 1991-01-02 Menetelmä jatkuvatoimisen, useamman valssituolin käsittävän valssauslinjan ohjaamiseksi
JP3032293A JPH04220109A (ja) 1990-02-02 1991-01-30 複数スタンド連続圧延ライン用制御装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90102109A EP0439663B1 (fr) 1990-02-02 1990-02-02 Procédé de commande d'un laminoir continu à plusieurs cages

Publications (2)

Publication Number Publication Date
EP0439663A1 EP0439663A1 (fr) 1991-08-07
EP0439663B1 true EP0439663B1 (fr) 1993-12-01

Family

ID=8203579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102109A Revoked EP0439663B1 (fr) 1990-02-02 1990-02-02 Procédé de commande d'un laminoir continu à plusieurs cages

Country Status (6)

Country Link
EP (1) EP0439663B1 (fr)
JP (1) JPH04220109A (fr)
AT (1) ATE97838T1 (fr)
DE (1) DE59003705D1 (fr)
ES (1) ES2046545T3 (fr)
FI (1) FI93805C (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10137246A1 (de) * 2001-07-30 2003-02-20 Siemens Ag Walzstraße

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU475854B2 (en) * 1972-09-06 1976-09-02 Mitsubishi Electric Corporation System for controlling rolling mills
JPS595364B2 (ja) * 1977-01-07 1984-02-04 株式会社日立製作所 張力制御方法
FR2399883A1 (fr) * 1977-08-08 1979-03-09 Siderurgie Fse Inst Rech Procede de prereglage d'un train continu a cages tandem pour le laminage a chaud de produits metalliques
DE2834102C2 (de) * 1978-08-03 1982-11-18 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zur Regelung der im Walzgut übertragenenZugkraft in einer m Gerüste enthaltenden Walzstraße
EP0130231B1 (fr) * 1983-07-04 1987-01-21 Siemens Aktiengesellschaft Arrangement de circuits pour la régulation de la force de traction transmise entre les cages de cylindres d'un train de laminoir à cages multiples
DE3821990A1 (de) * 1988-06-30 1990-01-11 Schloemann Siemag Ag Regelung fuer profilstrassen

Also Published As

Publication number Publication date
ATE97838T1 (de) 1993-12-15
DE59003705D1 (de) 1994-01-13
ES2046545T3 (es) 1994-02-01
FI93805B (fi) 1995-02-28
FI910011A0 (fi) 1991-01-02
EP0439663A1 (fr) 1991-08-07
FI93805C (fi) 1995-06-12
JPH04220109A (ja) 1992-08-11
FI910011L (fi) 1991-08-03

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