EP0041025A1 - Verfahren und Vorrichtung zum Walzen von Metall ohne Walzgutspannung - Google Patents

Verfahren und Vorrichtung zum Walzen von Metall ohne Walzgutspannung Download PDF

Info

Publication number
EP0041025A1
EP0041025A1 EP81400827A EP81400827A EP0041025A1 EP 0041025 A1 EP0041025 A1 EP 0041025A1 EP 81400827 A EP81400827 A EP 81400827A EP 81400827 A EP81400827 A EP 81400827A EP 0041025 A1 EP0041025 A1 EP 0041025A1
Authority
EP
European Patent Office
Prior art keywords
cage
order
rolling
metal
circuit
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
EP81400827A
Other languages
English (en)
French (fr)
Other versions
EP0041025B1 (de
Inventor
Jacques Fromont
Marcel Plançon
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.)
Jeumont Schneider SA
Original Assignee
Jeumont Schneider SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9242404&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0041025(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Jeumont Schneider SA filed Critical Jeumont Schneider SA
Publication of EP0041025A1 publication Critical patent/EP0041025A1/de
Application granted granted Critical
Publication of EP0041025B1 publication Critical patent/EP0041025B1/de
Expired legal-status Critical Current

Links

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
    • B21B37/48—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
    • 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
    • B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/12—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 structural sections, i.e. work of special cross-section, e.g. angle steel in a continuous process, i.e. without reversing stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/02—Speed
    • B21B2275/04—Roll speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2275/00—Mill drive parameters
    • B21B2275/10—Motor power; motor current
    • B21B2275/12—Roll torque

Definitions

  • the present invention relates to the unconstrained rolling of metals and, more specifically, a method and a device for such rolling applicable to a continuous rolling train including at least two non-reversible cages whose respective drive motors are controlled by means of '' a circuit connected to a cruise control.
  • Methods are known for detecting and correcting a possible tension or compression of the metal between two successive cages, methods according to which the value of the forward or backward sliding of the metal in each cage is regulated as an essential characteristic of any stress on the metal. .
  • French patent 2,395,086 describes such a process.
  • the speed sensors which must be used are generally either imprecise, such as the tachogenerators, or expensive, such as the electronic correlators, and are practically unusable for certain measurements, because of the ambient temperature conditions.
  • this process does not take into account variations in the parasites of the rolling focus and in particular the volume flow rate of the rolled product. This results in a certain imprecision in the calculation of the slip value which is, therefore, maintained at a value such that each cage exerts a traction on the metal, it being understood that a very slight traction on the metal is entirely preferable to compression of the metal, or even at the sole risk of possible compression.
  • the object of the present invention is to obviate all of the aforementioned drawbacks.
  • FIG. 1 represents the block diagram of operation of two successive non-reversible stands of a continuous rolling train for long products, in accordance with the invention, and FIG. 2 represents more precisely the detail of one of the control units represented in FIG. 1.
  • the non-reversible continuous rolling trains generally comprise several successive stands designated here symbolically by their date, for example (n), (n + 1) in which n is an integer at least equal to 1.
  • Each cage is provided with a drive motor, respectively 4 and 5, coupled to a pulse generator 6, 7, the frequency of which is proportional to the speed of rotation of a motor to which it is coupled.
  • an electric photo cell 8, 9 for example makes it possible to detect the immediate introduction of the metal into the cage, while a strain gauge 10, 11, placed in the cage, makes it possible to generate a signal representative of the rolling effort of the corresponding cage.
  • the drive motors 4, 5 are supplied from the line 12 by means of converters 13, 14, in particular with thyristorso
  • Each control unit for example 15 associated with the order cage (n) receives at its input terminal 20 the information relating to the control unit 16 associated with the immediately higher order cage (n + 1) , and, at its input terminals 21, 22, 23, 24 and 25, the signals respectively from the photoelectric cell 9 disposed at the input of the order cage (n + 1), of the gauge constraint 10 placed in the cage 2 of order (n), of the sensor 17 of the intensity of the current flowing in the converter 13 which it controls, of the pulse generators 6, 7 coupled to the order cages (n) and (n + 1).
  • a general speed reference signal 18 of all the cages is applied to the input terminal 26 of all the control units so as to uniformly vary the rolling speed of the entire train under consideration.
  • each control unit 15 has at least two output terminals 27 and 28, one connected to the downstream control unit and the other to the converter 13 which it controls.
  • the control unit 15 of the order cage (n) is shown in more detail in FIG. 2 with the same references.
  • This control unit 15 essentially comprises, in addition to the logic 30, a speed regulator 31 the output of which is connected to a current regulator 32 itself connected to the input terminal 23 of the unit, terminal which is connected to the sensor 17.
  • the regulator 32 is connected to the output terminal 28 of the unit 15 9 itself connected to the converter 13.
  • the signal from the pulse generator 6 is applied, by the input terminal 24 of the unit 15, to a converter 33 at the output of which is generated a digital signal representative of the frequency of the pulses.
  • This output is connected, on the one hand, to the speed regulator 31, on the other hand, to a circuit for determining the rolling torque 34 which is also connected to the output of the speed regulator speed 31, and finally, to a divider circuit 35 which performs the ratio of the speeds of the order cages (n) and (n + 1), and to the other input from which the digital signal from a converter 36 is applied identical to the converter 33 but connected to the input terminal 25 of the unit 15 itself connected to the pulse generator 7 coupled to the motor 5 of the cage 3 of order (n + 1).
  • One of the outputs of the circuit 34 for determining the rolling torque is connected to one of the inputs of the speed regulator 31 by means of a loop for regulating the rolling torque of the order cage (n) .
  • This loop includes, in known manner, a first memory 37, a comparator 38 and a regulation circuit 39, operating during the first step of the method according to the invention, and a second memory 40 used during the second step of the method.
  • This torque determination circuit 34 also has an output connected to an input of a circuit 41 for developing a multiplier coefficient, another input of which is connected to the input terminal 22 of the unit 15, which even connected to the strain gauge 10 arranged in the order cage (n).
  • This processing circuit 41 is connected: to a multiplier circuit 42, to the other input from which the signal from the divider circuit 35 is applied.
  • the output of the multiplier circuit 42 is connected to one of the inputs of the speed regulator 31 by means of a loop for regulating the flow of the rolled metal operating during the third step of the process.
  • This last loop includes a memory 43, a comparator 44 and a regulator 45.
  • the speed regulator 31 has an input terminal connected to the input terminal 26 of the unit 15 to which the general speed reference signal 18 is applied.
  • the logic input terminals 30 are respectively connected to the input terminals 24, 22, 21 and 20 of the unit 15 and to an output terminal of the circuit 34 for determining the rolling torque, while its terminals outputs are connected on the one hand to the output terminal 26 of the unit 15 connected to the control unit of the order cage (n-1), and respectively to the control terminals of the memories 37 and 40 and of the circuit 39 of the torque control loop, as well as the memory control terminals 43 and regulator 45 of the flow control loop.
  • the operation of the device is as follows: the taking over of the cage 2 of order (n) is detected by the appearance of a rolling torque in the motor 4, or by means of the strain gauge 10.
  • the value of the rolling torque is determined by the circuit 34 and is recorded in the memory 37.
  • the precise moment can be determined for example, either by means of a photoelectric cell 9 disposed at the input of the cage 3 as shown in FIG. 1, or by means of a counter connected to the output of the pulse generator 6 it being understood that the distance separating the two successive cages is well known.
  • the value of the torque of rolling in the cage 2 of order (n) is kept constant by means of the regulation loop connected to the speed regulator 31 controlled in a known manner by the logic 30.
  • the correction signal from comparator 38 is recorded in the memory 40, and remains permanently applied until the end of the rolling or speed regulator 31
  • the logic 30 which has already controlled the succession of the aforementioned operations, then commands the commissioning of the flow regulation loop until the end of rolling carried out by the order cage (n). This flow regulation is obtained by applying a corrective term to the speed ratio.
  • This corrective term is a multiplying coefficient which has the form of the expression 1 + k in which k is a function, among other things, of the force of separation of the cylinders of the cage considered, of the yield coefficient of this same cage, of the radius of the cylinders and also the thickness of the slot between the cylinders, in particular at the neutral point.
  • This corrective term is developed by circuit 41 and is applied to the ratio of speeds of the cages of order (n) and (n + 1) by means of the multiplier circuit 42 o The signal from this latter circuit 42 is then processed in a loop identical to a speed control loop for cages.
  • Such a process is favorably implemented for the rolling of long products such as rails, sections, trusses, it being understood that the product is found simultaneously during rolling, engaged in several successive non-reversible cages.
  • the pulls or the compression of the product between two successive cages causes deformations in the desired profile of the finished product and the method according to the invention makes it possible to avoid such drawbacks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
EP81400827A 1980-05-28 1981-05-25 Verfahren und Vorrichtung zum Walzen von Metall ohne Walzgutspannung Expired EP0041025B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011796 1980-05-28
FR8011796A FR2483268A1 (fr) 1980-05-28 1980-05-28 Procede et dispositif pour le laminage sans ccontrainte de metaux

Publications (2)

Publication Number Publication Date
EP0041025A1 true EP0041025A1 (de) 1981-12-02
EP0041025B1 EP0041025B1 (de) 1985-01-09

Family

ID=9242404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400827A Expired EP0041025B1 (de) 1980-05-28 1981-05-25 Verfahren und Vorrichtung zum Walzen von Metall ohne Walzgutspannung

Country Status (5)

Country Link
US (1) US4408470A (de)
EP (1) EP0041025B1 (de)
JP (1) JPS5736007A (de)
DE (1) DE3168119D1 (de)
FR (1) FR2483268A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290834A1 (de) * 1987-05-15 1988-11-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Zugsteuerung in einer Konti-Walzstrasse
EP0698572A1 (de) * 1994-08-27 1996-02-28 Licentia Patent-Verwaltungs-GmbH Verfahren zur Steuerung von Bahngeschwindigkeiten in einer Einrichtung für den Transport oder die Streckung einer Materialbahn

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950009138B1 (ko) * 1987-10-09 1995-08-16 가부시끼가이샤 히다찌 세이사꾸쇼 판재 열간 압연 설비의 제어장치
US5101650A (en) * 1990-05-01 1992-04-07 Allegheny Ludlum Corporation Tandem mill feed forward gage control with speed ratio error compensation
AU7935594A (en) * 1993-10-18 1995-05-08 Jack-Eric Vandenbroucke Quick automated tool changer roll forming apparatus
WO1997027012A1 (en) * 1996-01-23 1997-07-31 Siemens Aktiengesellschaft System and method for rolling slabs
US5806357A (en) * 1996-01-23 1998-09-15 Siemens Aktiengesellschaft System and method for rolling tapered slabs
FR2788233B1 (fr) * 1999-01-11 2001-02-23 Alstom Procede de regulation des tractions/compressions dans un laminoir multicage a chaud et systeme de commande correspondant
RU2198753C1 (ru) * 2002-03-22 2003-02-20 Общество с ограниченной ответственностью "СЛОТ" Способ задания скоростного режима непрерывной группы прокатных клетей стана горячей прокатки металла с обеспечением минимального натяжения в межклетевых промежутках
US10363590B2 (en) 2015-03-19 2019-07-30 Machine Concepts, Inc. Shape correction leveler drive systems
IT201700107113A1 (it) * 2017-09-25 2019-03-25 Danieli Off Mecc Procedimento di regolazione del tiro di una barra e relativo dispositivo

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413492A1 (de) * 1974-03-20 1975-10-02 Siemens Ag Verfahren und schaltungsanordnung zur gegenseitigen abstimmung der antriebsdrehzahlen einer mehrgeruestigen walzstrasse mit einzelantrieben
US3940960A (en) * 1974-01-21 1976-03-02 Hitachi, Ltd. Interstand tension control method and apparatus for tandem rolling mills
US4003230A (en) * 1974-08-16 1977-01-18 Hitachi, Ltd. Tension control system for universal mill
FR2323463A1 (fr) * 1975-09-15 1977-04-08 Siemens Ag Procede et dispositif de laminage en continu
FR2354154A1 (fr) * 1976-06-11 1978-01-06 Jeumont Schneider Procede pour le laminage sans contrainte de metaux et dispositif pour la mise en oeuvre de ce procede
US4087859A (en) * 1975-08-20 1978-05-02 Tokyo Shibaura Denki Kabushiki Kaisha Apparatus for measuring and controlling interstand tensions of continuous rolling mills
DE2816091A1 (de) * 1977-04-28 1978-11-09 Tokyo Shibaura Electric Co Einrichtung zum steuern der zwischengeruestspannung eines kontinuierlichen walzwerks
EP0008037A1 (de) * 1978-08-03 1980-02-20 Siemens Aktiengesellschaft Vorrichtung zur Regelung der Zugkraft in einer mehrgerüstigen Walzstrasse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3688532A (en) * 1970-11-24 1972-09-05 Antonio Vicente Silva Control system for tandem rolling mill based on the constant volume principle
JPS52116761A (en) * 1976-03-26 1977-09-30 Hitachi Ltd System for controlling thickness of rolled plate
JPS5561306A (en) * 1978-11-01 1980-05-09 Mitsubishi Electric Corp Changing system for rolling schedule while running rolling stand
JPS55112111A (en) * 1979-02-23 1980-08-29 Hitachi Ltd Controller for continuous rolling mill

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3940960A (en) * 1974-01-21 1976-03-02 Hitachi, Ltd. Interstand tension control method and apparatus for tandem rolling mills
DE2413492A1 (de) * 1974-03-20 1975-10-02 Siemens Ag Verfahren und schaltungsanordnung zur gegenseitigen abstimmung der antriebsdrehzahlen einer mehrgeruestigen walzstrasse mit einzelantrieben
US4003230A (en) * 1974-08-16 1977-01-18 Hitachi, Ltd. Tension control system for universal mill
US4087859A (en) * 1975-08-20 1978-05-02 Tokyo Shibaura Denki Kabushiki Kaisha Apparatus for measuring and controlling interstand tensions of continuous rolling mills
FR2323463A1 (fr) * 1975-09-15 1977-04-08 Siemens Ag Procede et dispositif de laminage en continu
FR2354154A1 (fr) * 1976-06-11 1978-01-06 Jeumont Schneider Procede pour le laminage sans contrainte de metaux et dispositif pour la mise en oeuvre de ce procede
DE2816091A1 (de) * 1977-04-28 1978-11-09 Tokyo Shibaura Electric Co Einrichtung zum steuern der zwischengeruestspannung eines kontinuierlichen walzwerks
EP0008037A1 (de) * 1978-08-03 1980-02-20 Siemens Aktiengesellschaft Vorrichtung zur Regelung der Zugkraft in einer mehrgerüstigen Walzstrasse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290834A1 (de) * 1987-05-15 1988-11-17 DANIELI & C. OFFICINE MECCANICHE S.p.A. Zugsteuerung in einer Konti-Walzstrasse
US4942543A (en) * 1987-05-15 1990-07-17 Danieli & C. Officine Meccaniche Spa And Ceda Spa Costruzioni Elettromeccaniche E Dispositivi D'automazione Method for regulating the pull in continuous rolling trains and rolling train which adopts said method
EP0698572A1 (de) * 1994-08-27 1996-02-28 Licentia Patent-Verwaltungs-GmbH Verfahren zur Steuerung von Bahngeschwindigkeiten in einer Einrichtung für den Transport oder die Streckung einer Materialbahn

Also Published As

Publication number Publication date
JPS5736007A (de) 1982-02-26
US4408470A (en) 1983-10-11
EP0041025B1 (de) 1985-01-09
FR2483268B1 (de) 1984-01-27
DE3168119D1 (en) 1985-02-21
FR2483268A1 (fr) 1981-12-04

Similar Documents

Publication Publication Date Title
EP0041025B1 (de) Verfahren und Vorrichtung zum Walzen von Metall ohne Walzgutspannung
FR2580220A1 (fr) Procede et appareil de commande d'injection d'une machine de moulage par injection
EP0719607B1 (de) Verfahren zur Regelung des kontinuierlichen Giessens zwischen Walzen
FR2596886A1 (fr) Procede de commande et de controle de debit d'alimentation, notamment pour balances
EP0047218B1 (de) Kontroll- und Regelverfahren beim kontinuierlichen Giessen von Bändern
FR2583583A1 (fr) Procede et dispositif pour controler la charge de la batterie de demarreur d'un vehicule, notamment d'une voiture particuliere
EP0741448B1 (de) Anlaufsteuerungsverfahren und Vorrichtung zu dessen Betrieb
WO2018037191A1 (fr) Procede et dispositif d'estimation de force
CH627388A5 (fr) Procede et dispositif de regulation d'une operation de coulee basse pression.
FR2733096A1 (fr) Procede de regulation de vitesse d'un moteur electrique
CH615367A5 (de)
FR2898523A1 (fr) Procede de laminage d'une bande de tole.
FR2550897A1 (fr) Procede de stabilisation de la commande de vitesse d'un moteur a courant continu d'entrainement d'un ascenseur et dispositif pour la mise en oeuvre de ce procede
FR2511629A1 (fr) Systeme electrique de commande pour la limitation de la course sans butee sur des machines-outils, en particulier des machines a roder
EP0616411A1 (de) Schnelladeverfahren für Batterie und integrierter Schaltkreis zur Durchführung des Verfahrens
FR2501542A1 (fr) Dispositif pour reguler un laminoir quarto pour le laminage des metaux
EP0537081B1 (de) Energieregelsystem der Versorgungsbatterie eines elektrischen Fahrzeug-Antriebsmotors
EP0000454B1 (de) Verfahren zum Steuern der Walzgutspannung zwischen aufeinanderfolgenden Walzgerüsten beim Warmwalzen von dickem Walzgut.
EP0000855B1 (de) Verfahren zum Vorsteuern von einer kontinuierlichen Tandemstrasse beim Warmwalzen von Metall
FR2802632A1 (fr) Dispositif et procede de mesure de la vitesse d'ecoulement d'un gaz
FR2802362A1 (fr) Procede et appareil de mesure indirecte du glissement d'un moteur a induction pour etablir une commande de vitesse
FR2504414A1 (fr) Procede et appareillage pour preregler automatiquement un laminoir afin de compenser les variations de largeur de la bande laminee
FR3087162A1 (fr) Systeme de diagnostic sur place de la batterie d'un velo electrique
EP0560688A1 (de) Regelungsvorrichtung eines Kaltbearbeitungswerkzeuges zum Nachwalzen von Blech
EP0532395B1 (de) Verfahren und Vorrichtung zur Steuerung von Asynchronmotoren in Parallele

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB SE

17P Request for examination filed

Effective date: 19820128

DET De: translation of patent claims
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE GB SE

REF Corresponds to:

Ref document number: 3168119

Country of ref document: DE

Date of ref document: 19850221

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BROWN,BOVERI & CIE AKTIENGESELLSCHAFT

Effective date: 19850925

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: ASEA BROWN BOVERI AG

Effective date: 19850925

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
27W Patent revoked

Effective date: 19890130

EUG Se: european patent has lapsed

Ref document number: 81400827.2

Effective date: 19890717