EP0504075A1 - Procédé permettant d'éviter la coulure sur une machine de coulée entre cylindres - Google Patents

Procédé permettant d'éviter la coulure sur une machine de coulée entre cylindres Download PDF

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Publication number
EP0504075A1
EP0504075A1 EP92420069A EP92420069A EP0504075A1 EP 0504075 A1 EP0504075 A1 EP 0504075A1 EP 92420069 A EP92420069 A EP 92420069A EP 92420069 A EP92420069 A EP 92420069A EP 0504075 A1 EP0504075 A1 EP 0504075A1
Authority
EP
European Patent Office
Prior art keywords
speed
cylinders
value
revolution
cylinder
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.)
Withdrawn
Application number
EP92420069A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jacques Charpentier
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.)
Constellium Issoire SAS
Original Assignee
Pechiney Rhenalu SAS
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 Pechiney Rhenalu SAS filed Critical Pechiney Rhenalu SAS
Publication of EP0504075A1 publication Critical patent/EP0504075A1/fr
Withdrawn legal-status Critical Current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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
    • B21B2035/005—Hydraulic drive motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/04—Brakes
    • 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

Definitions

  • the present invention relates to a method making it possible to avoid sagging on a machine for casting between rolls.
  • metal can be melted in the form of a strip a few millimeters thick, several meters wide and several tens of meters in length by means of a casting machine comprising two rotary cylinders, cooled and between which the molten metal passes to be solidified and rolled there.
  • a casting machine comprising two rotary cylinders, cooled and between which the molten metal passes to be solidified and rolled there.
  • Such a type of machine has been described, in particular, in French patent n ° 1198006.
  • rotation can be ensured either by means of a motor rotating one of the cylinders, the other cylinder being driven by the passage of the strip or by a mechanical gear, or by means of two motors driving separately each cylinder.
  • Said motors are driven at a suitable speed of rotation either by an electric current or a fluid in the case of a hydraulic motor.
  • the cylinders of a casting machine generally consist of a cylindrical central core covered on its lateral face with a hoop which is rectified, after a variable period of time according to the conditions of use, so as to restore the polish necessary for obtaining a strip having a good surface appearance.
  • each cylinder Because of this rectification, which cannot be perfectly carried out, and the thermal stresses to which the hoop is subjected in contact with the hot metal and the coolant, each cylinder has a runout. This run-out has an influence on the measurement of the parameters mentioned above and disturbs the detection of the beginnings of a run according to the patented process.
  • the invention consisting of a method making it possible to avoid sagging on a casting machine between cylinders in which at least one of the parameters belonging to the group consisting of the electrical current or the pressure of the engine fluid which drives at least one of the cylinders is measured at constant speed, the torque exerted on at least one cylinders for advancing the strip, the force exerted by the strip on at least one of the cylinders or on the uprights of the frame, characterized in that at each revolution of the cylinder there are raised at regular intervals in at least 20 positions of the cylinder the values of at least one of said parameters and compares them for each position; when in three successive positions, the value of said parameter P0 has decreased by an amount at least equal to 2% between turn n-1 and turn n, then the cylinder speed is reduced to reaching a value P1 of said parameter greater than P0; as soon as the difference between the values of P1 and P0 remains constant over one revolution, the speed is increased until reaching the initial speed unless a new decrease in the parameter appears at least equal to
  • FIG. 1 there are more particularly two curves giving on the ordinate the values of P and on the abscissa the different measurement positions on turn n-1 and on turn n.
  • the two curves have been separated although in the absence of any signs of sagging they are confused.
  • FIG. 2 a distinction is made between the frame 1 of the machine supporting the two cylinders 2 and 3, the extensions 4 and 5 of which are each connected to a motor 6 and 7 by means of the reducers 8 and 9.
  • the dynamometric brakes 10 and 11 for measuring the torque are placed on the extensions while on the supply circuits, not shown, motors can be placed ammeters for measuring the intensities in the case of electric motors and manometers in the case of hydraulic motors.
  • the method according to the invention makes it possible to cast strips having the suitable length without sagging and therefore requiring no dropping or scrapping.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP92420069A 1991-03-12 1992-03-09 Procédé permettant d'éviter la coulure sur une machine de coulée entre cylindres Withdrawn EP0504075A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9103659 1991-03-12
FR9103659A FR2673865A1 (fr) 1991-03-12 1991-03-12 Procede permettant d'eviter la coulure sur une machine de coulee entre cylindres.

Publications (1)

Publication Number Publication Date
EP0504075A1 true EP0504075A1 (fr) 1992-09-16

Family

ID=9411143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420069A Withdrawn EP0504075A1 (fr) 1991-03-12 1992-03-09 Procédé permettant d'éviter la coulure sur une machine de coulée entre cylindres

Country Status (5)

Country Link
US (1) US5224535A (enrdf_load_stackoverflow)
EP (1) EP0504075A1 (enrdf_load_stackoverflow)
BR (1) BR9200780A (enrdf_load_stackoverflow)
CA (1) CA2062469C (enrdf_load_stackoverflow)
FR (1) FR2673865A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7650925B2 (en) * 2006-08-28 2010-01-26 Nucor Corporation Identifying and reducing causes of defects in thin cast strip

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056777A2 (fr) * 1981-01-19 1982-07-28 Cegedur Societe De Transformation De L'aluminium Pechiney 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
EP0275976A2 (en) * 1987-01-20 1988-07-27 Hunter Engineering Company, Inc. Casting machine control

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU655468A1 (ru) * 1976-06-17 1979-04-05 Центральный научно-исследовательский институт черной металлургии им. И.П.Бардина Способ контрол валков в зоне вторичного охлаждени установки непрерывной разливки металлов
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
JPS59225866A (ja) * 1983-06-07 1984-12-18 Nippon Steel Corp 連続鋳造設備における鋳片引抜制御装置
JPS6049835A (ja) * 1983-08-31 1985-03-19 Ishikawajima Harima Heavy Ind Co Ltd 双ロ−ル式連続鋳造法
US4678023A (en) * 1985-12-24 1987-07-07 Aluminum Company Of America Closed loop delivery gauge control in roll casting

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056777A2 (fr) * 1981-01-19 1982-07-28 Cegedur Societe De Transformation De L'aluminium Pechiney 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
EP0275976A2 (en) * 1987-01-20 1988-07-27 Hunter Engineering Company, Inc. Casting machine control

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
'Light Metals, 1985' , METALLURGICAL SOCIETY OF AIME , WARRENDALE "Optimisation of 3C Roll Caster by automatic control", (S.J. Bercovici) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 100 (M-376)(1823) 2 Mai 1985 & JP-A-59 225 866 ( SHIN NIPPON SEITETSU K.K. ) 18 Décembre 1984 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 179 (M-399)(1902) 24 Juillet 1985 & JP-A-60 049 835 ( ISHIKAWAJIMA HARIMA JUKOGYO K.K. ) 19 Mars 1985 *

Also Published As

Publication number Publication date
CA2062469C (fr) 1996-04-09
FR2673865A1 (fr) 1992-09-18
FR2673865B1 (enrdf_load_stackoverflow) 1995-05-24
CA2062469A1 (fr) 1992-09-13
BR9200780A (pt) 1992-11-17
US5224535A (en) 1993-07-06

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