EP0047218A2 - Kontroll- und Regelverfahren beim kontinuierlichen Giessen von Bändern - Google Patents

Kontroll- und Regelverfahren beim kontinuierlichen Giessen von Bändern Download PDF

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Publication number
EP0047218A2
EP0047218A2 EP81420130A EP81420130A EP0047218A2 EP 0047218 A2 EP0047218 A2 EP 0047218A2 EP 81420130 A EP81420130 A EP 81420130A EP 81420130 A EP81420130 A EP 81420130A EP 0047218 A2 EP0047218 A2 EP 0047218A2
Authority
EP
European Patent Office
Prior art keywords
speed
strip
difference
casting
deviation
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
EP81420130A
Other languages
English (en)
French (fr)
Other versions
EP0047218B1 (de
EP0047218A3 (en
Inventor
Serge Bercovici
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.)
Societe de Conditionnement en Aluminium SCAL GP SA
Original Assignee
Societe de Conditionnement en Aluminium SCAL GP 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
Application filed by Societe de Conditionnement en Aluminium SCAL GP SA filed Critical Societe de Conditionnement en Aluminium SCAL GP SA
Priority to AT81420130T priority Critical patent/ATE6217T1/de
Publication of EP0047218A2 publication Critical patent/EP0047218A2/de
Publication of EP0047218A3 publication Critical patent/EP0047218A3/fr
Application granted granted Critical
Publication of EP0047218B1 publication Critical patent/EP0047218B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the subject of the present invention is a process for controlling and regulating the operating parameters of a machine for casting strips between rolls, intended to optimize the conditions for obtaining a good quality product and, in particular, to increase the productivity.
  • the outlet section of the nozzle is parallel to the axes of the cylinders and located at a certain distance from the plane passing through these axes which is called the exit plane.
  • the metal distributed by the nozzle fills the free space between the cylinders along a circular arc comprised between the plane of the outlet section of the nozzle and the outlet plane of the cylinders.
  • the metal cools, begins to solidify in a place called swamp, due to the presence of a more or less viscous mixture of crystals and liquid, located at a distance from the plane of the section outlet point of the nozzle generally called marsh depth.
  • the metal solidifies completely and is drawn towards the exit plane of the cylinders in an increasingly restricted space, where it undergoes a rolling force which gradually brings it to the desired thickness when it escapes by the space between cylinders in the form of a strip which is then taken up by a reel.
  • This strip is subsequently subjected to various mechanical and / or thermal treatments which lead to products such as thin sheet for example, the mechanical characteristics of which: resistance, elastic limit, elongation, hardness, etc., will be partly a function of the quality of the strip from the casting machine. It is therefore important to try to maintain good quality from the start to the end of the tape casting. For this, the machine must be operated under the conditions most favorable for obtaining such a result, even when it is used at its maximum speed.
  • the causes of faults are also related to the casting speed. Indeed, it has been found that beyond certain speeds, the machine's operating stability becomes more critical and more sensitive to certain hazards, and, in particular, to variations in the operating factors listed above, which is reflected by an increased frequency of appearance of faults.
  • This process is characterized in that one considers at least one of the parameters belonging to the group constituted by the torque exerted on at least one of the cylinders to advance the strip, the force exerted by the strip on the at least one of the journals, the temperature of the strip at the outlet of the cylinders, the difference between the instantaneous value of the parameter considered and the average value of this same parameter is continuously measured during an immediately preceding period of time; when this difference becomes negative for the torque and the force, and positive for the temperature, and greater in absolute value than a reference difference, the casting speed is reduced until the difference becomes again less than the reference deviation, then, the casting speed is increased as long as the deviation between the instantaneous value of the parameter and the average value of this parameter during an immediately preceding period of time does not exceed the reference deviation.
  • the method according to the invention consists first of all in considering only certain operating parameters such as the torque exerted on at least one of the cylinders to advance the strip, the force exerted by the strip on one at least of the journals of each cylinder, the temperature of the strip at the outlet of the cylinders. Control and regulation can be carried out on one or two or on the three parameters at the same time.
  • the measurement means are conventional: for the torque, it is for example possible to use the intensity of the electric current which feeds the engine for controlling the rotation of the cylinders or to use the indications of a strain gauge placed on one of the pins; for the force exerted by the strip, one can place, for example, a strain gauge between the chocks of the cylinders and the clamping screws or measure the hydraulic pressure of the clamping circuit; for temperature, one can take for example a thermoelectric probe or an optical pyrometer mounted so as to be able to scan the entire width of the strip and to make it possible to determine an average value of the temperature.
  • the invention can be carried out using any measurement means whatever it may be.
  • the measurements thus made are sent to a computer such as a computer, minicomputer, microprocessor or programmable controller capable of calculating averages.
  • a computer such as a computer, minicomputer, microprocessor or programmable controller capable of calculating averages.
  • the invention is characterized in that the difference between the instantaneous value of the parameter and the average value of this same parameter is measured for an immediately preceding period of time. It is therefore necessary that the device which receives the information on the values of the parameters can memorize them over a given period of time At and calculate the average. At this time, he must also be able to measure the difference between the value of the parameter at time t and the average value of this same parameter during the period ⁇ t which has just passed, then to compare it with a difference reference, and, depending on the value of this difference, whether or not to output a signal intended to modify the casting speed of the machine.
  • any deviation value less than the reference deviation will result in the absence of a signal at the computer output; on the contrary, any higher value will result in a signal to reduce the casting speed.
  • This reduction can be done gradually or in fixed-term steps and continues until the difference becomes less than the reference difference.
  • the average value retained by the computer is that which corresponds to the time period At immediately preceding that when the deviation has become greater than the reference deviation.
  • This reference difference is, in general, less than 10% of the average value of the parameter considered, and this in order to have a suitable response time.
  • the time period At is preferably less than ten minutes to best follow the fluctuations of the parameter.
  • the reduction corresponding to each stage is less than 15% of the speed value at the instant immediately prior.
  • Each level lasts less than five minutes.
  • the computer sends a speed increase signal whose value is less than 10% of the speed value at the previous instant and continues to compare the difference between the instantaneous value of the parameter and the average value of the parameter during an immediately preceding period of time and less than five minutes.
  • This increase can also be done gradually or in successive stages. In the latter case, the increase in speed at each level is less than 10% of the speed value at an instant immediately prior, the duration of the level being less than five minutes. The increase continues as long as the deviation for one of the three parameters does not exceed the reference deviation.
  • the casting machine will always operate at the maximum speed compatible with the absence of faults.
  • a machine of the SCAL Jumbo 3C type is used as well as a PERKIN ELMER 1620 minicomputer.
  • the cast alloy is 1050, the composition of which is described in "Standard for Aluminum Mill Products "published by” Aluminum Association ".
  • the thickness of the strip is 10 mm.
  • Torque is measured via motor intensity machine cylinder drive (DC motor).
  • the rolling forces are measured by means of two manometers measuring the pressure of the hydraulic circuit on each of the two columns.
  • the temperature of the strip, at the outlet of the cylinders, is measured by an optical pyrometer, which scans the entire surface of the strip.
  • the computer immediately gives an order to slow down the linear speed of the cylinders to a value of 0.05 m / min. If after 10 seconds all the differences between the instantaneous values of the cylinder engine intensity, the two pressures and the belt temperature and the average values of these parameters have not become smaller than the reference deviations, the calculator gives a second order to slow the cylinders down by 0.05 m / min. This procedure is repeated until each of the deviations is less than the reference deviation. The casting is then again judged stable and the computer repeats the procedure for increasing the speed described above.
  • the maximum instantaneous speed measured under these conditions is 1.25 m / min, which corresponds to a productivity of approximately 2.02 tonnes per hour and per meter of bandwidth produced. Beyond this, solidification defects appear.
  • maintaining continuous casting at this speed is very difficult because it requires perfect consistency of the temperature of the liquid metal in the pouring chute, the lubrication of the cylinders, etc.
  • the process described more high made it possible to maintain an average speed of approximately 1.22 m / min in continuous operation, or an average productivity of 1.98 tonnes per hour and per meter of width, and this without any defect in solidification on the strip.
  • the method according to the invention finds its application in the continuous casting of metals between cylinders, in all cases where it is desired to optimize the conditions for obtaining a quality product, and, in particular, to increase productivity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Valve Device For Special Equipments (AREA)
  • Paper (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Sewing Machines And Sewing (AREA)
  • Saccharide Compounds (AREA)
  • Peptides Or Proteins (AREA)
  • Press Drives And Press Lines (AREA)
  • Coating With Molten Metal (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP81420130A 1980-09-01 1981-08-28 Kontroll- und Regelverfahren beim kontinuierlichen Giessen von Bändern Expired EP0047218B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420130T ATE6217T1 (de) 1980-09-01 1981-08-28 Kontroll- und regelverfahren beim kontinuierlichen giessen von baendern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8019162 1980-09-01
FR8019162A FR2490516A1 (fr) 1980-09-01 1980-09-01 Procede de controle et de regulation de parametres de marche d'une machine de coulee continue de bandes entre cylindres

Publications (3)

Publication Number Publication Date
EP0047218A2 true EP0047218A2 (de) 1982-03-10
EP0047218A3 EP0047218A3 (en) 1982-03-17
EP0047218B1 EP0047218B1 (de) 1984-02-15

Family

ID=9245668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420130A Expired EP0047218B1 (de) 1980-09-01 1981-08-28 Kontroll- und Regelverfahren beim kontinuierlichen Giessen von Bändern

Country Status (23)

Country Link
US (1) US4497360A (de)
EP (1) EP0047218B1 (de)
JP (1) JPS5775260A (de)
KR (1) KR870002051B1 (de)
AT (1) ATE6217T1 (de)
AU (1) AU542900B2 (de)
BG (1) BG48925A3 (de)
BR (1) BR8105528A (de)
CA (1) CA1165973A (de)
DD (1) DD201651A5 (de)
EG (1) EG15215A (de)
ES (1) ES8206234A1 (de)
FR (1) FR2490516A1 (de)
GB (1) GB2087100B (de)
GR (1) GR75737B (de)
HU (1) HU188689B (de)
IN (1) IN154438B (de)
MX (1) MX156220A (de)
MY (1) MY8500860A (de)
NO (1) NO157646C (de)
SU (1) SU1215608A3 (de)
TR (1) TR21469A (de)
YU (1) YU44418B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095352A2 (de) * 1982-05-24 1983-11-30 Kawasaki Steel Corporation Verfahren und Vorrichtung zum Herstellen von schnell erhärteten Stahlbändern durch ein Doppelrollensystem
EP0138059A1 (de) * 1983-09-19 1985-04-24 Hitachi, Ltd. Verfahren und Vorrichtung zum Giessen eines Metallbandes zwischen zwei Walzen
CN103862018A (zh) * 2014-02-10 2014-06-18 邯钢集团邯宝钢铁有限公司 一种利用数学模型调节连铸机扇形段辊缝的方法

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498099A2 (fr) * 1981-01-19 1982-07-23 Conditionnements Aluminium Sca Procede de controle et de regulation de parametres de marche d'une machine de coulee continue de bandes entre cylindres permettant d'eviter le collage
GB8505199D0 (en) * 1985-02-28 1985-04-03 Bicc Plc Extrusion control
US4678023A (en) * 1985-12-24 1987-07-07 Aluminum Company Of America Closed loop delivery gauge control in roll casting
US4727927A (en) * 1987-01-20 1988-03-01 Hunter Engineering Company, Inc. Casting machine control
FR2621839B1 (fr) * 1987-10-14 1992-02-21 Cegedur Procede de controle et de reglage de la lubrification de la face de travail des cylindres rotatifs d'une machine de coulee continue de bandes
US6272282B1 (en) * 1989-07-20 2001-08-07 Canon Kabushiki Kaisha Recording/reproducing apparatus having means for reproducing signals from a recording block recorded immediately before
DD285649A5 (de) * 1989-10-12 1990-12-19 ������@������������k�� Verfahren zum steuern der arbeitsgeschwindigkeit von verarbeitungsmaschinen
US5031688A (en) * 1989-12-11 1991-07-16 Bethlehem Steel Corporation Method and apparatus for controlling the thickness of metal strip cast in a twin roll continuous casting machine
FR2673865A1 (fr) * 1991-03-12 1992-09-18 Rhenalu Pechiney Procede permettant d'eviter la coulure sur une machine de coulee entre cylindres.
KR920019450A (ko) * 1991-04-10 1992-11-19 라우에너 엔지니어링 악티엔게젤샤프트 롤 캐스팅 방법
US5518064A (en) * 1993-10-07 1996-05-21 Norandal, Usa Thin gauge roll casting method
US6648059B2 (en) * 2001-02-22 2003-11-18 Aktiebolaget Skf Method for detecting a roller failure
US7137434B1 (en) 2004-01-14 2006-11-21 Savariego Samuel F Continuous roll casting of ferrous and non-ferrous metals
CN1329146C (zh) * 2005-01-31 2007-08-01 宝山钢铁股份有限公司 薄带连铸粘辊在线预报方法
CN101722284A (zh) * 2009-09-17 2010-06-09 杭州谱诚泰迪实业有限公司 一种连铸结晶器振动检测装置及检测方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR755623A (fr) * 1932-05-16 1933-11-28 Hazelett Metals Inc Procédés, appareils et produits métallurgiques
FR866139A (fr) * 1940-03-04 1941-06-18 Procédé et dispositifs de laminage de métaux et alliages en fusion, y compris les aciers
US3869891A (en) * 1974-04-08 1975-03-11 Measurex Corp Speed optimizing system for a rolling mill

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478808A (en) * 1964-10-08 1969-11-18 Bunker Ramo Method of continuously casting steel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR755623A (fr) * 1932-05-16 1933-11-28 Hazelett Metals Inc Procédés, appareils et produits métallurgiques
FR866139A (fr) * 1940-03-04 1941-06-18 Procédé et dispositifs de laminage de métaux et alliages en fusion, y compris les aciers
US3869891A (en) * 1974-04-08 1975-03-11 Measurex Corp Speed optimizing system for a rolling mill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0095352A2 (de) * 1982-05-24 1983-11-30 Kawasaki Steel Corporation Verfahren und Vorrichtung zum Herstellen von schnell erhärteten Stahlbändern durch ein Doppelrollensystem
EP0095352A3 (en) * 1982-05-24 1985-09-25 Kawasaki Steel Corporation Process and apparatus for the production of rapidly solidified metallic tapes by double-roll system
EP0138059A1 (de) * 1983-09-19 1985-04-24 Hitachi, Ltd. Verfahren und Vorrichtung zum Giessen eines Metallbandes zwischen zwei Walzen
CN103862018A (zh) * 2014-02-10 2014-06-18 邯钢集团邯宝钢铁有限公司 一种利用数学模型调节连铸机扇形段辊缝的方法

Also Published As

Publication number Publication date
JPS5775260A (en) 1982-05-11
GR75737B (de) 1984-08-02
CA1165973A (fr) 1984-04-24
DD201651A5 (de) 1983-08-03
BG48925A3 (en) 1991-06-14
YU207981A (en) 1986-04-30
TR21469A (tr) 1984-06-28
EP0047218B1 (de) 1984-02-15
KR830007181A (ko) 1983-10-14
GB2087100B (en) 1984-02-01
AU7477181A (en) 1982-03-11
YU44418B (en) 1990-08-31
BR8105528A (pt) 1982-05-18
HU188689B (en) 1986-05-28
US4497360A (en) 1985-02-05
KR870002051B1 (ko) 1987-12-03
JPS617143B2 (de) 1986-03-04
IN154438B (de) 1984-10-27
ES505074A0 (es) 1982-08-16
SU1215608A3 (ru) 1986-02-28
EP0047218A3 (en) 1982-03-17
NO812952L (no) 1982-03-02
AU542900B2 (en) 1985-03-21
GB2087100A (en) 1982-05-19
FR2490516B1 (de) 1982-09-10
FR2490516A1 (fr) 1982-03-26
ATE6217T1 (de) 1984-03-15
EG15215A (en) 1989-12-30
MY8500860A (en) 1985-12-31
NO157646C (no) 1988-04-27
MX156220A (es) 1988-07-26
ES8206234A1 (es) 1982-08-16
NO157646B (no) 1988-01-18

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