EP0000454A1 - Verfahren zum Steuern der Walzgutspannung zwischen aufeinanderfolgenden Walzgerüsten beim Warmwalzen von dickem Walzgut. - Google Patents

Verfahren zum Steuern der Walzgutspannung zwischen aufeinanderfolgenden Walzgerüsten beim Warmwalzen von dickem Walzgut. Download PDF

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Publication number
EP0000454A1
EP0000454A1 EP78400031A EP78400031A EP0000454A1 EP 0000454 A1 EP0000454 A1 EP 0000454A1 EP 78400031 A EP78400031 A EP 78400031A EP 78400031 A EP78400031 A EP 78400031A EP 0000454 A1 EP0000454 A1 EP 0000454A1
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EP
European Patent Office
Prior art keywords
product
speed
cages
slip
value
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
EP78400031A
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English (en)
French (fr)
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EP0000454B1 (de
Inventor
Philippe Millamon
Pierre Petit
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
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Institut de Recherches de la Siderurgie Francaise IRSID
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Publication date
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    • 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 the hot rolling of thick, flat or long products in trains fitted with tandem cages and, more specifically, to the control of the tension between successive cages.
  • the tension between cages can be measured directly, by means of a tensiometer and, on the other hand, the control of metal flow rates does not need to be as precise because the tensile strength is high and the band can withstand significant stresses without the necking appear.
  • the object of the present invention is precisely to provide a process for controlling the rolling of thick hot products, a process allowing both the determination in an indirect manner and the continuous adjustment of the tension of the product.
  • the setpoint value chosen is equal to the value of the slip in the absence of traction increased by 2 to 5%.
  • the speed of the product is measured by the so-called “correlation” method, known per se, which will be recalled below.
  • the values of the rotational speeds of the rolls corresponding, for a product, to rolling under low tension can be used as preset values for a subsequent blank of similar characteristics.
  • the method according to the invention is based on an indirect determination of the traction between cages, using the measurement of the slip.
  • sliding means the difference between the speed of the product and the peripheral speed of the cylinder, reduced to the speed of the cylinder.
  • a backward sliding if we refer to the speed of the product at the entry of the cage
  • a forward sliding if we consider the speed of exit of the product.
  • product 1 during rolling is represented at the moment when, engaged in a cage, referenced 2, it will enter the next cage 3.
  • the two cages have been shown diagrammatically by their working rolls only.
  • the blank At the entry of the cage 2 the blank has a speed V e9 it emerges therefrom , after reduction of thickness, with the speed V s .
  • the cylinders having a linear speed V c , the forward sliding of the cage 2 is given by the formula:
  • the product 1 is not yet engaged in the cage 3, g o is the value of the slip without traction.
  • the speeds of the cylinder and of the product are measured continuously, the first for example using a tachometric dynamo, for the second any sufficiently precise means can obviously be used, but the applicant preferably recommends the process and the device described in French Patent No. 2,161,757.
  • This method consists in calculating the speed by detection and correlation of two similar random signals, shifted in time and linked to the moving product.
  • Two optical detectors 4 and 5, for example photoelectric receivers, are placed between the cages, above the product, and are located at a well-defined distance from one another relative to the direction of travel of the laminated product.
  • the signals emitted by detectors 4 and 5 are sent to a time-delayed correlator; the latter, not being part of the invention, has not been shown here and, for more details on this apparatus, reference may be made to the aforementioned patent.
  • a time-delayed correlator To determine the initial value of the delay, use the signals supplied by the passage in front of the detectors of the head of the product, therefore the average speed of travel of the head of the product. This method thus makes it possible to know, at all times, the real speed of the blank with great precision.
  • the signals corresponding to the speeds of the cylinders and of the product are sent to a device making it possible to calculate the value of the slip.
  • This value is continuously compared with a setpoint value equal, in the example considered, to the value of the slip without traction increased by 3%.
  • the comparator When the actual slip value becomes lower or higher than the set value, the comparator generates an error signal.
  • the latter is transmitted to the control computer for the conduct of the rolling mill, which immediately triggers an action on the speed of the stands, so as to reduce the error signal to zero.
  • This modification can be carried out on cage 2, on cage 3 or on both simultaneously.
  • the speed of the cage 2 can be increased until the error signal is canceled.
  • the values of the rotational speeds determined during the rolling of the first blank using the method according to the invention can be used as preset values before the engagement of the following ones.
  • the method according to the invention can very well be implemented on a manually controlled rolling mill, the information collected then being used directly and the corrective actions carried out by the personnel responsible for conducting operations.
  • the error signal then becomes one of the parameters controlling the speed regulation of the cages.
  • the application of the method according to the invention is not limited to single tandem cages, but can easily be generalized to three and then to any number of cages where the product is taken simultaneously.
  • a first approximation generally sufficient, consists in considering the cages as independent two by two.
  • the last one has been incorrectly preset, it appears at the engagement of the product a variation of the slip between the first two cages and a value different from the reference between the last two.
  • a satisfactory result is then obtained by considering the last two cages as isolated from the first and by only modifying the speed of rotation of the third to bring the slip back to the set value.
  • the method according to the invention making it possible to detect traction or compression as soon as it appears and to take immediate corrective action, appreciably reduces the number of blanks rejected because of their bad geometry and presents , therefore, a certain economic interest.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
EP19780400031 1977-06-24 1978-06-22 Verfahren zum Steuern der Walzgutspannung zwischen aufeinanderfolgenden Walzgerüsten beim Warmwalzen von dickem Walzgut. Expired EP0000454B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7719710 1977-06-24
FR7719710A FR2395086A1 (fr) 1977-06-24 1977-06-24 Procede de controle de la tension de produits epais lamines a chaud en prise entre deux cages successives

Publications (2)

Publication Number Publication Date
EP0000454A1 true EP0000454A1 (de) 1979-01-24
EP0000454B1 EP0000454B1 (de) 1982-02-24

Family

ID=9192646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19780400031 Expired EP0000454B1 (de) 1977-06-24 1978-06-22 Verfahren zum Steuern der Walzgutspannung zwischen aufeinanderfolgenden Walzgerüsten beim Warmwalzen von dickem Walzgut.

Country Status (3)

Country Link
EP (1) EP0000454B1 (de)
DE (1) DE2861644D1 (de)
FR (1) FR2395086A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004598A2 (de) * 1978-04-10 1979-10-17 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Verfahren und Schaltungsanordnung zur Regelung der Längskraft zwischen Walzgerüsten einer kontinuierlichen Walzstrasse mit Einzelantrieben
WO2007104865A1 (fr) * 2006-03-14 2007-09-20 Converteam Sas Procede de laminage d'une bande de tole
US20170260880A1 (en) * 2016-03-09 2017-09-14 Honda Motor Co., Ltd. Overhead camshaft engine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1323176A (fr) * 1961-04-20 1963-04-05 Schloemann Ag Procédé et montage pour mesurer et régler la traction ou la compression entre deux ou plusieurs cages de trains de laminoir continus comprenant des cages successives et destinés notamment à la production de laminés rigides
FR1355412A (fr) * 1962-05-11 1964-03-13 Schloemann Ag Procédé pour mesurer des contraintes de traction et de compression dans la matière laminée, entre les cages d'un groupe de plusieurs cages d'un train de laminoir continu
FR1514209A (fr) * 1965-12-28 1968-02-23 British Iron Steel Research Perfectionnements aux laminoirs
DE1284922B (de) * 1963-03-14 1968-12-12 Schloemann Ag Verfahren zum Nachstellen von Walzgeruesten in kontinuierlichen Walzstrassen, insbesondere in Mittelstahlstrassen
GB1163059A (en) * 1966-11-12 1969-09-04 Siemens Ag A Method of and an Apparatus for Determining and Correcting Slipping in a Reversing Rolling Mill.
FR2161757A1 (de) * 1971-10-29 1973-07-13 Siderurgie Fse Inst Rech
FR2194493A1 (de) * 1972-07-31 1974-03-01 Westinghouse Electric Corp
US4003229A (en) * 1972-09-06 1977-01-18 Nippon Steel Corporation Method for compensating tail end

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1323176A (fr) * 1961-04-20 1963-04-05 Schloemann Ag Procédé et montage pour mesurer et régler la traction ou la compression entre deux ou plusieurs cages de trains de laminoir continus comprenant des cages successives et destinés notamment à la production de laminés rigides
FR1355412A (fr) * 1962-05-11 1964-03-13 Schloemann Ag Procédé pour mesurer des contraintes de traction et de compression dans la matière laminée, entre les cages d'un groupe de plusieurs cages d'un train de laminoir continu
DE1284922B (de) * 1963-03-14 1968-12-12 Schloemann Ag Verfahren zum Nachstellen von Walzgeruesten in kontinuierlichen Walzstrassen, insbesondere in Mittelstahlstrassen
FR1514209A (fr) * 1965-12-28 1968-02-23 British Iron Steel Research Perfectionnements aux laminoirs
GB1163059A (en) * 1966-11-12 1969-09-04 Siemens Ag A Method of and an Apparatus for Determining and Correcting Slipping in a Reversing Rolling Mill.
FR2161757A1 (de) * 1971-10-29 1973-07-13 Siderurgie Fse Inst Rech
FR2194493A1 (de) * 1972-07-31 1974-03-01 Westinghouse Electric Corp
US4003229A (en) * 1972-09-06 1977-01-18 Nippon Steel Corporation Method for compensating tail end

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TECHNISCHE MITTEILUNGEN AEG-TELEFUNKEN, vol. 66, no. 6, juin 1976, Berlin. BUXBAUM: "Minimalzugregelung f}r kontinuierliche Warmwalzstrassen", pages 255 à 261. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004598A2 (de) * 1978-04-10 1979-10-17 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Verfahren und Schaltungsanordnung zur Regelung der Längskraft zwischen Walzgerüsten einer kontinuierlichen Walzstrasse mit Einzelantrieben
EP0004598A3 (en) * 1978-04-10 1979-10-31 Brown, Boveri & Cie Aktiengesellschaft Mannheim Process and circuit for interstand tension control in a continuous rolling mill having individual drives
WO2007104865A1 (fr) * 2006-03-14 2007-09-20 Converteam Sas Procede de laminage d'une bande de tole
FR2898523A1 (fr) * 2006-03-14 2007-09-21 Alstom Power Conversion Sa Procede de laminage d'une bande de tole.
US8347681B2 (en) 2006-03-14 2013-01-08 Converteam Technology Ltd. Method for rolling a sheet metal strip
CN101454091B (zh) * 2006-03-14 2013-03-06 康沃尔蒂姆股份公司 轧制金属板条的方法
US20170260880A1 (en) * 2016-03-09 2017-09-14 Honda Motor Co., Ltd. Overhead camshaft engine

Also Published As

Publication number Publication date
EP0000454B1 (de) 1982-02-24
DE2861644D1 (en) 1982-03-25
FR2395086B1 (de) 1980-04-04
FR2395086A1 (fr) 1979-01-19

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