EP0147258A1 - Verfahren zum Ändern der Breite eines Gussstranges beim Stranggiessen ohne Unterbrechung des Giessens - Google Patents

Verfahren zum Ändern der Breite eines Gussstranges beim Stranggiessen ohne Unterbrechung des Giessens Download PDF

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Publication number
EP0147258A1
EP0147258A1 EP84402211A EP84402211A EP0147258A1 EP 0147258 A1 EP0147258 A1 EP 0147258A1 EP 84402211 A EP84402211 A EP 84402211A EP 84402211 A EP84402211 A EP 84402211A EP 0147258 A1 EP0147258 A1 EP 0147258A1
Authority
EP
European Patent Office
Prior art keywords
short side
width
length
mold
during
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
EP84402211A
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English (en)
French (fr)
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EP0147258B1 (de
Inventor
Alain Chielens
René Durinck
Pierre Werquin
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock 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 Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to AT84402211T priority Critical patent/ATE32844T1/de
Publication of EP0147258A1 publication Critical patent/EP0147258A1/de
Application granted granted Critical
Publication of EP0147258B1 publication Critical patent/EP0147258B1/de
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
    • B22D11/168—Controlling or regulating processes or operations for adjusting the mould size or mould taper

Definitions

  • the subject of the present invention is a method for modifying the width of a continuous casting product with rectangular section, such as a slab, without interrupting the casting, by displacement of at least one small side of the mold.
  • the speed of movement of the short side (s) is predetermined for the entire duration of the movement, so that the length of the variable-width section of the cast product, called the transition section, depends the speed of extraction of the cast product. It is not possible to obtain a transition section of predetermined length if the extraction speed accidentally varies during the change of width. However, to reduce losses and facilitate rolling operations, it is very important to be able to impose a given length on the transition section.
  • the object of the present invention is to provide a method for changing the width of a continuous casting product, without interrupting the casting, making it possible to produce a transition section of imposed length whatever the evolution of the speed of extraction of the cast product during the change of width.
  • the process which is the subject of the present invention is characterized in that the movements of the short side are controlled as a function of the length of the cast product from the start of the change in width so that the transition section of the cast product has a predetermined length which that is the evolution of the speed of extraction of the cast product during the change of width.
  • the relationship between the abscissa of any point on the small side of the mold, in particular the attachment points of the screw jacks used to move the short side, and the length of the cast product can be a polynomial. In particular, it could be a linear relation.
  • the intermediate phase could be a rotation around an axis coincident with the intersection of the planes defined by the inner face of the short side when the latter is in its initial and final positions, respectively, or an axis coincident with the intersection of the planes defined by the inner face of the short side when the latter is in the intermediate positions making the angle p with its initial and final positions, respectively, or of an axis parallel to these axes and located in the vicinity of these.
  • the continuous casting ingot molds used for the production of slabs consist of a frame 10 in the form of a frame supporting four plates forming the sides of the ingot mold.
  • the plates 12 constituting the short sides are normally clamped between the plates 14 constituting the long sides by pressure means, such as jacks or springs. When these means are made inactive, the short sides can be moved to adjust the width of the mold cavity and, consequently, of the slabs produced.
  • Figure 2 there is shown schematically the successive positions of a small side of the mold which is moved away from the axis XX 'of the cavity of the mold, to widen the latter.
  • the axis X'-X represents the trace on the plane of the figure, that is to say on the median plane parallel to the large faces of the mold, of the plane containing the axis of the laotière's cavity.
  • the axis XX ′ it will be, if appropriate, the plane containing this axis.
  • the line AA 3 represents the lower edge of the mold and the line BB 3 the level of the free surface of the metal in the mold.
  • the short side is in the AE position; it is inclined at an angle ⁇ 1 , relative to the axis XX ′, to take account of the contraction of the cast product due to its cooling in the mold; this inclination makes it possible to maintain the short side of the mold in contact with the small faces of the product poured practically over the entire height of the mold and, consequently, to reduce the risks of breakthroughs. It has been demonstrated and verified by experience that this inclination is such that the extension of the trace on the short side always passes through a fixed point 0, called the center of conicity, for all the widths of the cast product that we are able to produce industrially.
  • the short side is brought, by rotation around an axis 0 1 located below the lingo third, from the initial position AB to position A 1 B 1 such that its plane forms with the plane perpendicular to the plane of the figure and the trace of which on it is B 1 0 an angle ⁇ whose tangent is equal to the slope of the small faces of the transition section of the cast product (see Figure 3).
  • This angle depends on the length of the transition section and the variation in width that has been imposed.
  • the position of the axis of rotation O 1 is chosen so as to limit to an acceptable value, for example 1 mm, the clearance between the short side and the small face of the cast product and / or the compression of the latter by the short side. , over the entire height of the mold.
  • the short side is rotated around an axis perpendicular to the plane of the figure and passing through 0 to bring it into position A 2 B 2 .
  • This axis is in fact the intersection of all the planes defined by the inner face of the short side when it is in the normal casting position, for different widths of the mold.
  • the short side is rotated around an axis 0 2 , located at the level of the free surface of the metal in the ingot mold or in the vicinity thereof, to bring it into the chosen position A 3 B 3 .
  • the short side is inclined at an angle ⁇ 2 relative to the axis X'X and the plane of its interior face contains the center O.
  • the position of the axis O 2 is chosen to limit the clearance between the short side and the small face of the cast product and / or the compression of the latter to an acceptable value.
  • the short side is moved according to the length of the cast product.
  • the movements of the short side are controlled by the jacks 16, the running of which is controlled by the automaton or the computer 20 which imposes on them laws of linear displacement, the displacements of the two jacks remaining during each phase in a constant ratio which depends on the position chosen for the axis of rotation.
  • the length of the cast product is continuously measured, for example by means of a roller 22 applied to one face of the cast product and associated with an encoder which delivers pulses whose number is proportional to the number of turns of the roller and, therefore, the length of the cast product.
  • the operator introduces in the controller 20 the values imposed for the variation in width and length of the transition section. From these values, which make it possible to define the angle ⁇ , the automaton selects from a file the values of the parameters a l , b - possibly a ' 1 , b' 1 , a " 1 , b" 1 ... - a 2 , b2 , a 3 and b 3 - possibly to ' 3 , b' 3 , a " 3 , b" 3 ...
  • the computer or automaton which is equipped with a computer center, calculates from the moment the order to change the width is given, and at regular and very short time intervals, for example five seconds, the displacements to be imposed on the two jacks 16 during the time interval which follows the instant considered.
  • the automaton calculates the abscissae of a reference point of each of the screws which correspond to the position which the short side will have to reach at time t n + 1 .
  • the automaton will calculate, at time t n + 1 , the corrected abscissa, from the real length of the product poured up to this instant, then the differences between the real abscissa and the corrected abscissa and will correct in consequence the new abscissa calculated for the moment t n + 2 .
  • the rotation of the short side can take place around an axis 0 'coinciding with the intersection of the planes defined by the inner face of the short side when it is in positions A 1 B 1 and A 2 B 2 , respectively, or around an axis near 0 or O '.
  • the operation is carried out in the same way by tilting, at the start of the operation, the short side towards the inside of the mold with an angle e equal to l 'angle of inclination of the small faces of the transition section of the cast product, then by rotating it around an axis defined as in the previous case and passing through 0 or 0' or close to them and finally by straightening the short side by rotation about an axis 0 2 located near the level of the free surface of the liquid metal in the mold.
  • the two short sides of the ingot mold will be displaced simultaneously and symmetrically with respect to the axis X'X of the ingot mold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP84402211A 1983-11-23 1984-11-05 Verfahren zum Ändern der Breite eines Gussstranges beim Stranggiessen ohne Unterbrechung des Giessens Expired EP0147258B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402211T ATE32844T1 (de) 1983-11-23 1984-11-05 Verfahren zum aendern der breite eines gussstranges beim stranggiessen ohne unterbrechung des giessens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8318671A FR2555079B1 (fr) 1983-11-23 1983-11-23 Procede pour modifier la largeur d'une brame produite en coulee continue sans interrompre la coulee
FR8318671 1983-11-23

Publications (2)

Publication Number Publication Date
EP0147258A1 true EP0147258A1 (de) 1985-07-03
EP0147258B1 EP0147258B1 (de) 1988-03-09

Family

ID=9294443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402211A Expired EP0147258B1 (de) 1983-11-23 1984-11-05 Verfahren zum Ändern der Breite eines Gussstranges beim Stranggiessen ohne Unterbrechung des Giessens

Country Status (6)

Country Link
US (1) US4635704A (de)
EP (1) EP0147258B1 (de)
JP (1) JPS60118364A (de)
AT (1) ATE32844T1 (de)
DE (1) DE3469688D1 (de)
FR (1) FR2555079B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237629A1 (de) * 1986-02-15 1987-09-23 MANNESMANN Aktiengesellschaft Motorsteuerung für die Verstellung einer Schmalseitenplatte von Stranggiesskokillen für Metall, insbesondere für Stahl
AT405147B (de) * 1992-07-08 1999-05-25 Voest Alpine Ind Anlagen Verfahren zum vergrössern der breite eines gussstranges während des kontinuierlichen stranggiessens

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992002324A1 (en) * 1990-08-09 1992-02-20 Voest-Alpine International Corp. An improved method for controlling the clamping forces exerted on a continuous casting mold
US5205345A (en) * 1991-08-07 1993-04-27 Acutus Industries Method and apparatus for slab width control
US6857464B2 (en) * 2002-09-19 2005-02-22 Hatch Associates Ltd. Adjustable casting mold
US8381385B2 (en) * 2004-12-27 2013-02-26 Tri-Arrows Aluminum Inc. Shaped direct chill aluminum ingot
US20060137851A1 (en) * 2004-12-27 2006-06-29 Gyan Jha Shaped direct chill aluminum ingot
DE102007039882A1 (de) * 2007-04-26 2008-11-06 Sms Demag Ag Stranggießkokille
US20090050290A1 (en) * 2007-08-23 2009-02-26 Anderson Michael K Automated variable dimension mold and bottom block system
US9545662B2 (en) * 2007-08-23 2017-01-17 Wagstaff, Inc. Automated variable dimension mold and bottom block system
US10350674B2 (en) 2017-06-12 2019-07-16 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11331715B2 (en) 2017-06-12 2022-05-17 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11883876B2 (en) 2017-06-12 2024-01-30 Wagstaff, Inc. Dynamic mold shape control for direct chill casting
US11717882B1 (en) 2022-02-18 2023-08-08 Wagstaff, Inc. Mold casting surface cooling

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2365390A1 (fr) * 1976-09-27 1978-04-21 Kawasaki Steel Co Procede pour elargir une barre d'acier pendant sa coulee continue
EP0028766A1 (de) * 1979-11-02 1981-05-20 Concast Holding Ag Verfahren und Vorrichtung zum Verändern der Abmessungen eines Stranges beim Stranggiessen
GB2079198A (en) * 1980-07-03 1982-01-20 Nippon Steel Corp A method of reducing the width of a continuous casting mould during casting

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5216449B2 (de) * 1972-08-14 1977-05-10
JPS50152926A (de) * 1974-05-31 1975-12-09
JPS5154837A (en) * 1974-11-08 1976-05-14 Nippon Steel Corp Renzokuchuzochunochuhenhabakakudaihoho
JPS5794450A (en) * 1980-12-05 1982-06-11 Nippon Steel Corp Method for administration of size of ingot width in continuous casting
DE3110012C1 (de) * 1981-03-11 1982-11-04 Mannesmann AG, 4000 Düsseldorf Anordnung zur UEberwachung und Nachstellung der Neigung der Schmalseite einer Stranggiesskokille
CH658009A5 (de) * 1982-02-12 1986-10-15 Concast Service Union Ag Verfahren und plattenkokille zum kuehlen und stuetzen eines stranges in einer plattenkokille einer stahlstranggiessanlage.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2365390A1 (fr) * 1976-09-27 1978-04-21 Kawasaki Steel Co Procede pour elargir une barre d'acier pendant sa coulee continue
EP0028766A1 (de) * 1979-11-02 1981-05-20 Concast Holding Ag Verfahren und Vorrichtung zum Verändern der Abmessungen eines Stranges beim Stranggiessen
GB2079198A (en) * 1980-07-03 1982-01-20 Nippon Steel Corp A method of reducing the width of a continuous casting mould during casting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237629A1 (de) * 1986-02-15 1987-09-23 MANNESMANN Aktiengesellschaft Motorsteuerung für die Verstellung einer Schmalseitenplatte von Stranggiesskokillen für Metall, insbesondere für Stahl
AT405147B (de) * 1992-07-08 1999-05-25 Voest Alpine Ind Anlagen Verfahren zum vergrössern der breite eines gussstranges während des kontinuierlichen stranggiessens

Also Published As

Publication number Publication date
ATE32844T1 (de) 1988-03-15
FR2555079B1 (fr) 1986-03-28
DE3469688D1 (en) 1988-04-14
FR2555079A1 (fr) 1985-05-24
JPS60118364A (ja) 1985-06-25
US4635704A (en) 1987-01-13
EP0147258B1 (de) 1988-03-09

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