EP0056777B1 - Procédé de contrôle et de régulation de paramètres de marche d'une machine de coulée continue de bandes entre cylindres permettant d'éviter le collage - Google Patents

Procédé de contrôle et de régulation de paramètres de marche d'une machine de coulée continue de bandes entre cylindres permettant d'éviter le collage Download PDF

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Publication number
EP0056777B1
EP0056777B1 EP82420009A EP82420009A EP0056777B1 EP 0056777 B1 EP0056777 B1 EP 0056777B1 EP 82420009 A EP82420009 A EP 82420009A EP 82420009 A EP82420009 A EP 82420009A EP 0056777 B1 EP0056777 B1 EP 0056777B1
Authority
EP
European Patent Office
Prior art keywords
speed
frequency
casting
process according
reference frequency
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.)
Expired
Application number
EP82420009A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0056777A2 (fr
EP0056777A3 (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.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney 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 Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority to AT82420009T priority Critical patent/ATE10591T1/de
Publication of EP0056777A2 publication Critical patent/EP0056777A2/fr
Publication of EP0056777A3 publication Critical patent/EP0056777A3/fr
Application granted granted Critical
Publication of EP0056777B1 publication Critical patent/EP0056777B1/fr
Expired legal-status Critical Current

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    • 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
    • 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

Definitions

  • the present invention relates to a process for controlling and regulating the operating parameters of a machine for casting strips between rolls, making it possible to avoid sticking and to obtain maximum productivity.
  • the metal distributed by the nozzle fills the free space between the cylinders all along an arc of circle included 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. Then, the metal solidifies completely and is entrained 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 sheets, for example, whose mechanical characteristics: resistance, elastic limit, elongation; hardness, etc ... will depend in part on the quality of the strip from the casting machine.
  • casting machines are used at speeds clearly lower than their possibility, so as to avoid the appearance of sticking, whatever the possible variations of the working factors.
  • This process in which the torque exerted on one or the other of the cylinders to advance the strip is used as parameters, and not the total torque, is characterized in that the frequency of the variations in the measurement is constantly compared. torque at a reference frequency: when the frequency of variations is greater than the reference frequency, the casting speed of the machine is reduced and / or the lubricant flow is increased until the frequency of the variations becomes again lower than the reference frequency and remains in this state for a given time, then the casting speed is increased as long as the frequency of the variations remains lower than the reference frequency.
  • the method according to the invention consists first of all in considering as a running parameter only the torque exerted on one or the other of the cylinders to advance the strip.
  • This parameter comes from the fact that it has been observed that, when the strip is bonded to one of the cylinders, almost all of the torque is supported by the opposite cylinder without appreciably affecting the total torque, which in the absence of bonding, is distributed approximately equally between the two cylinders. It is therefore sufficient to consider one or the other of these couples to detect the sudden variation corresponding to the appearance of a collage. However, it may seem, under these conditions, that the process is limited to a rapid grasp of the phenomenon and an intervention aimed at eliminating it, which would not prevent the appearance of a defect on the tape and would lead in spite of everything to a partial scrap.
  • the method aims to provide for bonding and to provide the means to react before the defect has been able to manifest.
  • the speed reduction is obtained, for example, by varying the DC supply voltage of the cylinder drive motor; the lubricant flow is changed, for example, by a different setting of the intake valves.
  • This intervention does not occur immediately after the detection of a signal indicating that the frequency of the torque variations exceeds the reference frequency, but when this signal has been maintained for approximately five seconds, this so as to eliminate the fleeting increases which may occur and which are due to transient variations in certain walking parameters unrelated to the bonding phenomenon.
  • Reducing or increasing the machine speed can be done gradually or in fixed time steps.
  • the speed can be reduced for periods of time less than five minutes, by an amount less than - 15% of the value it had at the instant immediately prior.
  • the cylinders are rotated in opposite directions by means of a motor (12).
  • the torque measurement on one of the cylinders is detected by means of the strain gauge (13). This measurement is transmitted to the computer (14) which controls in (15) the speed of the motor by modifying the voltage of the supply current and in (16 and 16 ') the admission of lubricant to the ramps via the valves ( 9 and 9 ').
  • a 1235 alloy is poured, the composition of which is described in "Standard for Aluminum Mill Products" published by ALUMINUM ASSOCIATION in the form of a strip 8 mm thick with a speed of 1.30 m / min and a lubricant flow of 10 1 / hour by means of a machine of the SCAL JUMBO 3C type equipped with a PERKIN ELMER 1620 mini-computer.
  • the speed of the machine and the inlet valves of the lubricant not being controlled by the computer, the torque exerted on the lower cylinder is constantly measured by means of an extensometry gauge glued to the journal and sends the signal to an electronic device making it possible to directly detect variations in the torque and also to electronically filter this signal so as to retain only those whose frequency is greater than one Hertz.
  • the recording of the signals before filtration shows variations on either side of an average value of the period couple of the order of 30 seconds while the indicator of the filtered signal remains at zero,
  • the strip After the strip has been discarded, it is replaced under the same operating conditions as above, that is to say a casting speed of 1.3 m / min and a lubricant flow rate of 10 I / hour and it is controlled by the means of the microcomputer according to the invention, the speed of the machine and the lubricant inlet valves at the indications of the filter signal.
  • a frequency of variation of the torque measurement close to 3 Hertz is detected.
  • the lubricant flow is then automatically increased to 11 l / hour and the casting speed reduced by 0.05 m / min. After a few seconds, the frequency of the variations has returned to normal and the filtered signal is zero.
  • the speed After five minutes of walking under these conditions, the speed is gradually increased to 1.4 m / min and the casting is continued at this speed without the appearance of new micro-bonding even after several hours of casting.
  • the method according to the invention finds its application in the continuous casting of metal cylinders in all cases where it is desired to avoid the sticking of the strip on the cylinders and to keep the machine running under conditions of maximum productivity.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Continuous Casting (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Sewing Machines And Sewing (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Peptides Or Proteins (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Saccharide Compounds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Basic Packing Technique (AREA)
  • Moulding By Coating Moulds (AREA)
  • Metal Rolling (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
EP82420009A 1981-01-19 1982-01-18 Procédé de contrôle et de régulation de paramètres de marche d'une machine de coulée continue de bandes entre cylindres permettant d'éviter le collage Expired EP0056777B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420009T ATE10591T1 (de) 1981-01-19 1982-01-18 Kontrolle- und regelungsverfahren beim stranggiessen von baendern zwischen walzen zur verhinderung des anklebens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8101185A FR2498099A2 (fr) 1981-01-19 1981-01-19 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
FR8101185 1981-01-19

Publications (3)

Publication Number Publication Date
EP0056777A2 EP0056777A2 (fr) 1982-07-28
EP0056777A3 EP0056777A3 (en) 1982-08-18
EP0056777B1 true EP0056777B1 (fr) 1984-12-05

Family

ID=9254415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82420009A Expired EP0056777B1 (fr) 1981-01-19 1982-01-18 Procédé de contrôle et de régulation de paramètres de marche d'une machine de coulée continue de bandes entre cylindres permettant d'éviter le collage

Country Status (22)

Country Link
US (1) US4501315A (enrdf_load_stackoverflow)
EP (1) EP0056777B1 (enrdf_load_stackoverflow)
JP (1) JPS57165165A (enrdf_load_stackoverflow)
KR (1) KR880002370B1 (enrdf_load_stackoverflow)
AT (1) ATE10591T1 (enrdf_load_stackoverflow)
AU (1) AU546276B2 (enrdf_load_stackoverflow)
BG (1) BG45551A3 (enrdf_load_stackoverflow)
BR (1) BR8200252A (enrdf_load_stackoverflow)
CA (1) CA1185069A (enrdf_load_stackoverflow)
DD (1) DD201982A5 (enrdf_load_stackoverflow)
EG (1) EG15213A (enrdf_load_stackoverflow)
ES (1) ES8305233A2 (enrdf_load_stackoverflow)
FR (1) FR2498099A2 (enrdf_load_stackoverflow)
GB (1) GB2091455B (enrdf_load_stackoverflow)
GR (1) GR81337B (enrdf_load_stackoverflow)
HU (1) HU183802B (enrdf_load_stackoverflow)
IN (1) IN157291B (enrdf_load_stackoverflow)
MX (1) MX157804A (enrdf_load_stackoverflow)
MY (1) MY8500859A (enrdf_load_stackoverflow)
NO (1) NO157728C (enrdf_load_stackoverflow)
SU (1) SU1138008A3 (enrdf_load_stackoverflow)
YU (1) YU10282A (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP0407978B1 (en) * 1989-07-14 1995-12-20 Hunter Engineering Company, Inc. Roll casting machine crown control
GB9017042D0 (en) * 1990-08-03 1990-09-19 Davy Mckee Poole Twin roll casting
ES2090346T3 (es) * 1990-08-03 1996-10-16 Davy Mckee Poole Procedimiento y dispositivo de colada de metal con doble cilindro.
FR2673865A1 (fr) * 1991-03-12 1992-09-18 Rhenalu Pechiney Procede permettant d'eviter la coulure sur une machine de coulee entre cylindres.
US5638893A (en) * 1993-10-07 1997-06-17 Fata Hunter, Inc. Parting agent spray system
JPH0852519A (ja) * 1994-08-11 1996-02-27 Nippon Atsuen Kogyo Kk アルミニウムパンチング板の製造方法
PL3496881T3 (pl) 2016-08-10 2022-01-17 Nucor Corporation Sposób odlewania cienkiej taśmy

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824346A (en) * 1955-01-28 1958-02-25 Ohio Crankshaft Co Method of controlling lubrication of continuous casting
FR1329801A (fr) * 1961-05-26 1963-06-14 Davy & United Eng Co Ltd Procédé et système de commande de laminoir
US3478808A (en) * 1964-10-08 1969-11-18 Bunker Ramo Method of continuously casting steel
DE2743579A1 (de) * 1976-10-05 1978-04-06 Centre Rech Metallurgique Verfahren zur steuerung des stranggiessens von metallen
BE869726A (fr) * 1978-08-11 1978-12-01 Centre Rech Metallurgique Procede de regulation de l'addition de poudre de couverture en coulee continue des metaux
FR2490516A1 (fr) * 1980-09-01 1982-03-26 Scal Gp Condit Aluminium Procede de controle et de regulation de parametres de marche d'une machine de coulee continue de bandes entre cylindres

Also Published As

Publication number Publication date
SU1138008A3 (ru) 1985-01-30
NO820138L (no) 1982-07-20
FR2498099A2 (fr) 1982-07-23
US4501315A (en) 1985-02-26
GB2091455B (en) 1984-05-10
GB2091455A (en) 1982-07-28
ES508822A0 (es) 1983-04-01
CA1185069A (fr) 1985-04-09
BR8200252A (pt) 1982-11-23
ES8305233A2 (es) 1983-04-01
NO157728B (no) 1988-02-01
IN157291B (enrdf_load_stackoverflow) 1986-02-22
KR830008770A (ko) 1983-12-14
MY8500859A (en) 1985-12-31
JPS6238071B2 (enrdf_load_stackoverflow) 1987-08-15
HU183802B (en) 1984-06-28
AU7958582A (en) 1982-07-29
DD201982A5 (de) 1983-08-24
AU546276B2 (en) 1985-08-22
KR880002370B1 (en) 1988-11-03
EP0056777A2 (fr) 1982-07-28
GR81337B (enrdf_load_stackoverflow) 1984-12-11
FR2498099B2 (enrdf_load_stackoverflow) 1983-02-18
BG45551A3 (bg) 1989-06-15
YU10282A (en) 1986-04-30
EP0056777A3 (en) 1982-08-18
NO157728C (no) 1988-05-11
EG15213A (en) 1991-06-30
MX157804A (es) 1988-12-15
JPS57165165A (en) 1982-10-12
ATE10591T1 (de) 1984-12-15

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