EP0439663A1 - 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
EP0439663A1
EP0439663A1 EP90102109A EP90102109A EP0439663A1 EP 0439663 A1 EP0439663 A1 EP 0439663A1 EP 90102109 A EP90102109 A EP 90102109A EP 90102109 A EP90102109 A EP 90102109A EP 0439663 A1 EP0439663 A1 EP 0439663A1
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EP
European Patent Office
Prior art keywords
control device
rolling
control
values
mill
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
EP90102109A
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German (de)
English (en)
Other versions
EP0439663B1 (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
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8203579&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0439663(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP90102109A priority Critical patent/EP0439663B1/fr
Priority to AT90102109T priority patent/ATE97838T1/de
Priority to ES199090102109T priority patent/ES2046545T3/es
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 control device for a continuous, multi-stand rolling mill, in particular a steel mill, which has a computer with a memory for rolling program-specific sizes, e.g. Speed setpoints, armature currents and outlet cross sections as well as for the calculation of derived quantities, e.g. the rolling tensile stresses between the stands.
  • a control device for a continuous, multi-stand rolling mill in particular a steel mill
  • a computer with a memory for rolling program-specific sizes, e.g. Speed setpoints, armature currents and outlet cross sections as well as for the calculation of derived quantities, e.g. the rolling tensile stresses between the stands.
  • the reference lever arm for an i-th roll stand is calculated and stored in a memory and used to regulate the longitudinal tension of the rolling stock between the i-th and (i + 1) th roll stand, with the reference lever arm and more than one of the physical quantities of the rolling process including the thickness of the rolling stock at the entrance and exit of the i-th roll stand, the roll gap of the i-th roll stand and the rolling force on the i-th roll stand.
  • the tensile stress is calculated on the basis of the calculated lever arm and the recorded values of the rolling force and the rolling moment.
  • the rolling train goes beyond the usual photocells and current and voltage measuring devices with complex sensors that measure forces, e.g. for the rolling force or the rolling force lever arm.
  • the object is achieved in a surprisingly simple manner in that, for minimum tension control, the speeds of the individual stands of the rolling mill are controlled via additional speed setpoints, these being formed according to a predetermined calculation rule, taking into account stored empirical values. All that is required is a relatively simple computer with a memory, which stores the essential electrical values of a rolling mill that result during operation and evaluates them for use, the evaluation leading to a minimal train control behavior.
  • the empirical values are determined by an auxiliary program, stored and used with continuous correction to control the rolling process.
  • the control device according to the invention acts like a control method with a closed control loop and thus achieves simple, automatic, train-optimal adjustment of a rolling train. Only the response time of the control is longer than with direct control with sensors, but this can often be accepted, especially in the case of bar and section steel mills, since slight deviations from the optimal minimum pull do not have as disruptive effects as in sheet metal rolling mills.
  • the additional speed setpoints according to the calculation rule are formed, whereby K E is determined from the stored empirical values.
  • the empirical value K E is in the form of a percentage change in speed per N / mm2 and ⁇ J * A entered in the form of a specific train in N / mm2 and converted into current values in the computer.
  • K E is determined from the stored empirical values.
  • the empirical value K E is in the form of a percentage change in speed per N / mm2 and ⁇ J * A entered in the form of a specific train in N / mm2 and converted into current values in the computer.
  • the percentage change in speed the size of which is in the fraction of a percent, results in precise control, which takes into account the requirements of bar and section steel mills in particular, but can also be used for sheet metal rolling mills. As has been shown, the longer control cycle that arises does not lead to tolerance violations under normal conditions.
  • the armature current J A is filtered, in particular subjected to filtering in a Butterworth filter or similar filter. This results in a very advantageous smoothing of the armature current and one simply obtains a representative current mean value for the further calculations.
  • K E denotes J A1 the armature current before the tapping in the secondary scaffold, ie without being influenced by the secondary scaffold, J A2 the armature current after the tapping in the secondary scaffold, ie with the influence of the secondary scaffold and ⁇ J * A the train current setpoint, which is determined separately, usually in advance. This is done from stored rolling data and the fixed rolling mill parameters, such as gear ratio, field weakening ratio, etc.
  • 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 applied 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 throughput time of the rolling stock 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 , with the setpoint change for the following stand 1 m + after the calming time t A1 1 is determined.
  • the control direction is indicated by the dashed line 14, but can also run according to the dashed line 14 ', that is, in the opposite direction.
  • the adjustment of the individual stands takes place at high rolling stock speeds, for example with rolling stock head times from stand to stand under one to two seconds, in such a way that the additional speed setpoint 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 the stand 1 n is first corrected in a calming time t A1 , the current value is stored in the 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 stock replica is contained 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, which are preferably input via the six-pole Butterworth filter 10, divided into the closed state and the tensile state, into the memories 3 and 4 in relation to the position.
  • the signals of the armature currents for the draft-free and the tensile state reach the difference-forming device 5, which also contains the tensile current setpoint ⁇ J * A , an empirical value, which is dependent on the speed and rolling program, is entered from parameter input 2 '''.
  • the traction current error ⁇ J A is determined from this data and, together with the empirical value K E , is fed to the multiplier 6, in which the traction current setpoint n * 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 for the continuous determination and timely delivery of the speed setpoint n *.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Feedback Control In General (AREA)
  • Control Of Velocity Or Acceleration (AREA)
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
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.
ES199090102109T ES2046545T3 (es) 1990-02-02 1990-02-02 Instalacion de control para un tren de laminacion continuo de varios bastidores.
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 true EP0439663A1 (fr) 1991-08-07
EP0439663B1 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)

Cited By (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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2344920A1 (de) * 1972-09-06 1974-03-14 Mitsubishi Electric Corp Vorrichtung und verfahren zur regelung eines walzwerkes
DE2800197A1 (de) * 1977-01-07 1978-07-13 Hitachi Ltd Verfahren und anordnung zur regelung der walzgut-laengsspannung zwischen den walzgeruesten einer tandemwalzstrasse
EP0008037A1 (fr) * 1978-08-03 1980-02-20 Siemens Aktiengesellschaft Dispositif de commande de la tension dans un laminoir continu
EP0000855B1 (fr) * 1977-08-08 1981-01-28 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Procédé de préréglage d'un train continu à cages tandem pour le laminage à chaud de produits métalliques
EP0130231A1 (fr) * 1983-07-04 1985-01-09 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
EP0348777A2 (fr) * 1988-06-30 1990-01-03 Sms Schloemann-Siemag Aktiengesellschaft Commande pour trains de laminoirs à profilés

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2344920A1 (de) * 1972-09-06 1974-03-14 Mitsubishi Electric Corp Vorrichtung und verfahren zur regelung eines walzwerkes
DE2800197A1 (de) * 1977-01-07 1978-07-13 Hitachi Ltd Verfahren und anordnung zur regelung der walzgut-laengsspannung zwischen den walzgeruesten einer tandemwalzstrasse
EP0000855B1 (fr) * 1977-08-08 1981-01-28 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Procédé de préréglage d'un train continu à cages tandem pour le laminage à chaud de produits métalliques
EP0008037A1 (fr) * 1978-08-03 1980-02-20 Siemens Aktiengesellschaft Dispositif de commande de la tension dans un laminoir continu
EP0130231A1 (fr) * 1983-07-04 1985-01-09 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
EP0348777A2 (fr) * 1988-06-30 1990-01-03 Sms Schloemann-Siemag Aktiengesellschaft Commande pour trains de laminoirs à profilés

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
AEG-MITTELUNGEN, Band 56, Nr. 1, Januar 1966, Seiten 54-57, Berlin, DE; K. HERTLEIN: "Regeleinrichtung zum zug- und druckfreien Walzen in Knüppel- und Feinstahlstrassen" *
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 464 (M-771)[3311], 6. Dezember 1988; & Jp-A-63 188 414 (TOSHIBA) 04-08-1988 *
TECHN. MITT. AEG-TELEFUNKEN, Band 66, Nr. 6, Juni 1976, Seiten 255-261, Berlin, DE; A. BUXBAUM et al.: "Minimalzugregelung für kontinuierliche Warmwalzstrassen" *

Cited By (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

Also Published As

Publication number Publication date
JPH04220109A (ja) 1992-08-11
FI910011A (fi) 1991-08-03
FI93805C (fi) 1995-06-12
EP0439663B1 (fr) 1993-12-01
DE59003705D1 (de) 1994-01-13
ES2046545T3 (es) 1994-02-01
FI93805B (fi) 1995-02-28
ATE97838T1 (de) 1993-12-15
FI910011A0 (fi) 1991-01-02

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