EP0104373B1 - Dispositif de compensation du retrait pour une coquille de coulée continue - Google Patents

Dispositif de compensation du retrait pour une coquille de coulée continue Download PDF

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Publication number
EP0104373B1
EP0104373B1 EP83107725A EP83107725A EP0104373B1 EP 0104373 B1 EP0104373 B1 EP 0104373B1 EP 83107725 A EP83107725 A EP 83107725A EP 83107725 A EP83107725 A EP 83107725A EP 0104373 B1 EP0104373 B1 EP 0104373B1
Authority
EP
European Patent Office
Prior art keywords
casting
links
shrinkage
section
belts
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
EP83107725A
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German (de)
English (en)
Other versions
EP0104373A1 (fr
Inventor
Gerd Artz
Dieter Figge
Clemens Philipp
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.)
Fried Krupp AG
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Priority to AT83107725T priority Critical patent/ATE19013T1/de
Publication of EP0104373A1 publication Critical patent/EP0104373A1/fr
Application granted granted Critical
Publication of EP0104373B1 publication Critical patent/EP0104373B1/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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/066—Side dams

Definitions

  • the invention relates to a shrinkage compensation device for a continuous casting mold, in particular for steel, which consists of endless casting belts opposing each other in pairs and endless sectional side dams provided between them, the mutual distance between both the side dams and the casting belts being greater in the initial region of the mold cross section than in its end region .
  • Casting devices with continuous casting molds enable lead, zinc and copper to be cast at high casting speeds.
  • the shrinkage process occurring in the continuous casting mold which is caused by the cooling and solidification of the casting metal, is taken into account in a first level, formed by the moving articulated side dams, by suitable inclination of the associated guide rails.
  • shrinkage compensation has so far only been approximated. This consists in the deformation of the casting belt by means of spherical support rollers in such a way that a contact section with the thinning casting strand is established at least in the central region of the casting belt.
  • this known proposed solution has the disadvantage that a more or less large cavity, possibly filled with air, is formed in the transition area to the side dams.
  • the casting belt is considerably stressed by the deformation by means of the support rollers insofar as a sharp, wear-increasing edge is created in the area of the rigid links of the side dams used here.
  • the invention is based on the creation of a shrinkage compensation device which, with as little stress on the casting belt as possible, enables the mold cross section in the region of the casting belts to be adjusted as continuously as possible, possibly also non-linearly.
  • the shrinkage compensation device should also be usable in particular for steel-casting continuous casting molds with mold walls running in the casting direction, it must be designed in such a way that it has the greater linear shrinkage in the case of steel (approximately 1.5% compared to 0.57% in the case of copper) and the resulting result takes account of the greater conicity of the mold cross section.
  • the best possible adaptation to the shrinking process i.e.
  • the stated object is achieved by a shrinkage compensation device which essentially has the features of claim 1.
  • the idea of the solution on which the invention is based consists in that the individual members of the side dams are adjustable with regard to the height dimension of at least one of their sides and provide guide elements which, by adjusting the height members when the members move in the casting direction, make the necessary adaptation to those in the area of the mold walls in front of them cause shrinking process.
  • the change in the height dimension can be carried out on the inner surface laterally delimiting the mold cross section and / or on the outer surface facing away from the mold cross section.
  • the side dams are therefore constructed from links in such a way that the distance between the casting belts in the casting direction, which determines the height dimension of the casting strand, can be gradually reduced.
  • the shrinkage compensation device can advantageously be designed in that the inclination is carried out in several mutually independent sections, in particular using guide rails or rulers which laterally support and move against one another.
  • a particularly good adaptation to the shrinking process can be achieved by means of links whose inner surface that laterally delimits the mold cross section is adjustable in terms of its height dimension.
  • the adjustment of the height dimension of the inner surface of the links can be made possible in particular by the fact that they have a plurality of components that can be moved relative to one another (claim 2).
  • the links are composed of two main bodies which can be pivoted relative to one another about an axis parallel to the casting direction (claim 3); by increasing the inclination of the main bodies relative to one another, the dimension of the inner surface laterally delimiting the mold cross section in the casting direction can be gradually reduced, so that the mutual spacing of the cooperating casting belts in the area between the links, for example from 70 mm in the initial area of the mold cross section to 69 mm in the end area changed.
  • the casting strand fills the mold cross-section in the initial area of the mold cross-section, ie in the case of main members of the members that are not inclined against one another, while in the end area there is already a strand shell with main bodies inclined against one another, the corners of which are due to the there strong cooling occurring do not lie on the mold walls.
  • the members consisting of two main bodies form a dense inner surface, they are preferably supported on one another by means of a cylindrical surface, the longitudinal axis of which is parallel to the casting direction (claim 4).
  • the main bodies can thus be pivoted relative to one another transversely to the casting direction; their mutual angular position can be changed in a simple manner by guide elements which act on them at least indirectly and which are designed differently to achieve the required tilting force, as seen in the casting direction.
  • the casting belts opposite one another with respect to the mold cross section can adapt to the angular position of the main body carrying them, which can change in the casting direction, without any particular additional stress.
  • the links can also consist of two wedge pieces supported on one another via wedge surfaces, the guide elements for displacing the wedge pieces being designed as control cams arranged in the casting direction (claim 5).
  • the control cams is designed to be adjustable with respect to the mold cross-section (claim 6).
  • control cams expediently have a sliding element (claim 7), on which the wedge pieces can move without great frictional resistance.
  • the wedge pieces supported in each case form two chains, which are supported on two guide elements running in the casting direction in the form of guide rails; these can also be formed in several parts to implement differently designed adaptation sections.
  • Another possibility of adapting to the shrinkage process within the continuous casting mold is to make the members of the side dams elastically deformable at least in the region of one side, preferably in the region of their outer surface facing away from the mold cross section.
  • the links have a longitudinally extending recess extending from their outer surface and in which a spring element is supported; the deformation of the links, which changes in the casting direction, takes place via guide elements which at least indirectly engage them (claim 9).
  • the recess can in particular also be designed as a slot, as long as its deformability ensures sufficient deformability.
  • the elastically deformable, preferably one-part links preferably consist of a copper alloy which remains sufficiently elastic when the links pass through the continuous casting mold.
  • the deformation of the links can be limited in a simple manner by adjustable spacer bolts arranged in the region of the guide elements.
  • the guide elements preferably consist of successive, stationary back-up rolls in the casting direction, on which the casting belts are also supported outside the permanent mold section in the region of the links (claim 10).
  • the subject of the invention can in particular also be designed such that, instead of the elastically deformable, one-part links, two-part links produced using a connecting axis and a spring element are used. These must additionally have a device which prevents the components which are movable against one another from unfolding in the unloaded state; As a device in this regard, in particular a retaining bolt comes into question which movably connects the two components to one another - to the connecting axis - to an adjustable extent.
  • the continuous casting mold used for casting steel has as essential components four mold walls (shown schematically in Fig. 2a, b) moving in the casting direction, which enclose a rectangular mold cross-section 1 and consist of an upper and lower endless casting belt 2 as well as a left and right endless side dam 3 exist as lateral boundaries.
  • the side dams are made up of individual ones Links 4 (see FIG. 1) with an overhead head part 5 and a base body 6 supporting this made of a copper alloy.
  • the base body 6 is equipped in the region of the head part 5 with a cylinder section 6 ', on the cylinder surfaces 6 "and 6"' of which the head part 5 is supported directly or pivotably via a bearing plate 7 located below.
  • Parts 5 and 7 are detachably connected to one another via a screw connection 8 consisting of screw 8 ', nut 8 "and locking ring 8"'.
  • the base body 6 is equipped with a guide part 9, which is held by a snap ring 10.
  • the guide part 9 receives a side dam chain, not shown, by means of which the individual links 4 are combined to form an endless side dam.
  • the mold walls are equipped with horizontally arranged deflection axes, not shown.
  • the main bodies 5 and 6 of the links 4 assume the starting position shown in FIG. 1, in which the vertical axis 5 'of the head part 5 coincides with the vertical axis 6 "" of the base body 6.
  • the mutual distance between the horizontal casting belts 2 is 70 mm.
  • the limbs 4 and also the casting belts 2 are gradually adjusted or deformed in the casting direction (that is, perpendicular to the plane of the drawing) by means of differently designed support rollers, not shown, in such a way that in the end region of the mold cross-section shown in FIG. 2 b a distance between the casting belts 2 of 69 mm results; the pivoting movement of the main bodies 5 and 6 relative to one another has the result that the vertical axes 5 'and 6 "" run at an angle to one another.
  • the limbs 4 which laterally delimit the mold cross section 1 consist of an upper and lower wedge piece 11 or 12, which extend over wedge surfaces 11; or 12 'support each other and the T-shaped recess 11 "or 12" are combined with their own side dam chain, not shown, to form endless side dams.
  • the links 4 are moved over the side dam chains, not shown, just like the casting belts 2 in the area of the mold cross section 1 in the direction of the plane of the drawing.
  • the upper wedge piece 11 is supported on the side facing away from the mold cross section 1 with the interposition of a slide strip 13 on a guide: rail 14, which in turn is part of a stationary hollow beam 15.
  • the lower wedge piece 12 is held laterally with the interposition of a slide bar 16 on a guide rail 17; this is fastened to an adjusting bolt 18, which in turn can be adjusted via adjusting nuts 19 with respect to the hollow support 15 for the longitudinal extension of the mold cross section 1.
  • a displacement of the adjusting bolt 18 not only results in a displacement of the wedge piece 12 to the right, but at the same time a reduction in the distance between the opposing casting belts 2.
  • the mold cross section 1 can thus be adapted to the shrinking process going on in the continuous casting mold by suitable mutual adjustment of the guide rails 14 and 17 in the casting direction and without unfavorable deformation of the flat casting belts 2.
  • All the parts serving to adjust the wedge pieces 11 and 12 can be arranged between the opposing casting belts 2; this applies in particular if the continuous casting mold is equipped with a further mold cross section on the left as a mirror image of the hollow beam 15.
  • the hollow support 15 is coated with a sliding layer 20 on its upper and lower sides to support the casting belts 2.
  • FIG. 4 The mode of operation of the interacting upper and lower wedge pieces 11 and 12 can be seen from FIG. 4.
  • the wedge pieces 11 and 12 which are movable relative to one another, are arranged in such a way that they form a continuous inner surface from the partial surfaces 11 '"and 12'".
  • the mold cross section is 70 x 180 mm.
  • the wedge pieces 11 and 12 are gradually shifted under the action of the slide rails 14 and 17 (see FIG. 3) in such a way that their outer surfaces 11 "" and 12 "'merge into each other without a step (FIG. 4 b
  • the die cut has a height of 69 mm and a width of 177 mm.
  • the advantage in particular of the embodiment according to FIGS. 3 and 4 is that the wedge pieces 11 and 12 forming the links of the side dams in the initial region (FIG. 4 a) of the mold cross section - ie in the region in which the casting strand practically does not yet have a strand shell - Form a closed, continuous boundary wall.
  • a continuous boundary wall does not have to be present in the end region of the mold cross section (FIG. 4b), since the casting strand here already has a sufficiently strong strand shell. Otherwise lie anyway, the corners of the casting strand - due to the particularly strong cooling effect in the corner area - do not adhere to the mutually angled, moving mold walls.
  • FIG. 5 a, b Another possibility of adapting the mold cross section 1 to the shrinking process consists in the use of side dams 3, which are composed of elastically deformable members 4 (FIGS. 5 a, b). In the area of their outer surface 4 'facing away from the mold cross section, these have a longitudinal recess 21 extending from the latter, which divides the individual link into two connected spreading arms 4 ". The longitudinal extent of the recess 21 is therefore shorter than seen transversely to the casting direction the width of the link in question.
  • the spreading arms 4 ′′ are each provided with bearing bores 22 that lie opposite one another in pairs and in which a prestressed coil spring 23 is located Under the action of the at least one helical spring 23, the link can deform, if necessary, in such a way that its outer surface 4 'has a different height dimension than its inner surface 4''forming the boundary wall of the casting cross section 1.
  • the deformation of the limbs 4 moving in the casting direction is brought about by means of supporting elements which consist of supporting rollers 24 arranged in a fixed manner with supporting sections 24 ′ arranged next to one another.
  • the casting belts 2 are supported on these both in the area of the mold cross section 1 and in the area of the links 4.
  • the support sections 24 'thus engage indirectly in the case of the illustrated embodiment, i. H. on the casting belts 2, on the links 4.
  • the support rollers 24 which follow one another in the casting direction are designed differently. As can be seen in the drawing (FIG. 5 a), the support rollers 24 opposite each other with respect to the mold cross section 1 press the links 4 together in the initial area in such a way that a rectangular mold cross section results, for example, with a height dimension of 70 mm; the support rollers 24 thus absorb the spring force which is emitted by the at least one coil spring 23 of each link 4.
  • the support rollers 24, which follow in the casting direction, are modified in such a way that, with simultaneous elastic deformation of the members 4, there is a change in the mold cross-section 1 which is at least approximately adapted to the shrinking process.
  • the support sections 24 ' are graduated transversely to the casting direction with respect to their diameter so that the spreading arms 4 "of the links 4 are spread apart from one another and the casting belts 2 - in continuation of the course resulting from the spreading - To run slightly to each other up to the longitudinal axis 1 'of the mold cross section 1.
  • the gradation of the support sections 24' is preferably selected such that the height dimension of the mold cross section 1 is already only 69 mm in the vicinity of the inner surface 4 "'of the links 4.
  • an elastically deformable member made of a copper alloy can be modified within the scope of the inventive concept in such a way that the spreading arms 4 "separated by a recess are pivotably connected to one another via a connecting axis; each member is therefore in this case formed in two parts.
  • the links 4 are preferably dimensioned and designed such that they heat up to approximately 500 ° C. during the passage through the continuous casting mold. This applies in order to maintain sufficient elasticity, in particular for the embodiment shown in FIGS. 5 a, b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Claims (10)

1. Dispositif de compensation du retrait dans une lingotière de coulée continue,notamment pour la coulée continue de l'acier, qui est constituée par des bandes de coulée sans fin opposées par paires et par des parois latérales articulées sans fin situées entre les bandes, les distances qui séparent aussi bien les parois latérales que les bandes de coulée étant plus grandes dans l'état initial de la section de la lingotière que dans son état final, caractérisé en ce que la hauteur des éléments individuels (4) constituant les parois latérales peut être réglée, au moins sur l'un de leurs côtés qui font un angle avec les bandes de coulée (2) -la surface intérieure (4"'), qui limite latéralement la section (1) de la lingotière, et la surface extérieure (4'), située du côté opposé à la section de la lingotière- au moyen d'élements de guidage (14, 17, 24), pendant leur déplacement dans le sens de la coulée.
2. Dispositif de compensation du retrait selon la revendication 1, caractérisé en ce que les éléments (4) comportent plusieurs parties constitutives (5, 6, 11, 12, 4"), qui peuvent se déplacer les unes par rapport aux autres.
3. Dispositif de compensation du retrait selon l'une des revendications 1 ou 2, caractérisé en ce que les éléments (4) sont constitués par deux corps principaux (5, 6), qui peuvent pivoter l'un par rapport à l'autre autour d'un axe parallèle au sens de la coulée.
4. Dispositif de compensation du retrait selon la revendication 3, caractérisé en ce que les deux corps principaux (5, 6) prennent appui l'un sur l'autre le long d'une surface cylindrique (6"), dont l'axe longitudinal est parallèle au sens de la coulée.
5. Dispositif de compensation du retrait selon l'ure des revendications 1 ou 2, caractérisé en ce que les éléments (4) sont constitués par deux coins (11, 12) qui prennent appui l'un sur l'autre par l'intermédiaire de surfaces (11', 12') en forme de coins, et en ce que les éléments de guidage assurant le déplacement des coins sont des courbes de commande (14, 17) orientées dans le sens de la coulée.
6. Dispositif de compensation du retrait selon la revendication 5, caractérisé en ce que l'une au moins des courbes de commande (14, 17) est réglable en position par rapport à la section (1) de la lingotière.
7. Dispositif de compensation du retrait selon l'une des revendications 5 ou 6, caractérisé en ce que les courbes de commande (14, 17) comportent chacune, du côté tourné vers les coins (11, 12), un élément de glissière (13, 16).
8. Dispositif de compensation du retrait selon l'une des revendications 1 ou 2, caractérisé en ce qu'au moins dans la zone de leur surface extérieure (4') tournée du côté opposé à la section (1) de lalingotière, les éléments (4) peuvent se déformer élastiquement.
9. Dispositif de compensation du retrait selon la revendication 8, caractérisé en ce que les éléments (4) comportent un évidement (21), partant de leur surface extérieure (4') et orienté dans le sens longitudinal, dans lequel un élément élastique (23) prend appui, et en ce que la déformation des éléments dans le sens de la coulée est produite par des éléments de guidage (24) qui agissent au moins indirectement sur eux.
10. Dispositif de compensation du retrait selon l'une des revendications précédentes, caractérisé en ce que les éléments de guidage (24) sont constitués par des cylindres d'appui montés à poste fixe, qui se suivent dans le sens de la coulée et sur lesquels les bandes de coulée ( 2 ) prennent appui également en dehors de la section (1) de la coquille dans la zone des éléments (4).
EP83107725A 1982-08-30 1983-08-05 Dispositif de compensation du retrait pour une coquille de coulée continue Expired EP0104373B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83107725T ATE19013T1 (de) 1982-08-30 1983-08-05 Schrumpfausgleichseinrichtung fuer eine stranggiesskokille.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3232147A DE3232147C2 (de) 1982-08-30 1982-08-30 Schrumpfausgleichseinrichtung für eine Stranggießkokille
DE3232147 1982-08-30

Publications (2)

Publication Number Publication Date
EP0104373A1 EP0104373A1 (fr) 1984-04-04
EP0104373B1 true EP0104373B1 (fr) 1986-04-09

Family

ID=6172000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107725A Expired EP0104373B1 (fr) 1982-08-30 1983-08-05 Dispositif de compensation du retrait pour une coquille de coulée continue

Country Status (6)

Country Link
US (1) US4510990A (fr)
EP (1) EP0104373B1 (fr)
JP (1) JPS5956951A (fr)
AT (1) ATE19013T1 (fr)
DE (1) DE3232147C2 (fr)
ES (1) ES525208A0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418160C2 (de) * 1994-05-25 2003-01-30 Sms Demag Ag Brammenstranggießkokille

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH663165A5 (de) * 1983-08-24 1987-11-30 Lauener Eng Ag Giessmaschine zum stranggiessen von metall und verfahren zu deren betrieb.
US4632176A (en) * 1985-04-19 1986-12-30 Pearce Ronald A Apparatus for continuous strip casting of aluminum sheet material
EP0205646A1 (fr) * 1985-06-27 1986-12-30 Fried. Krupp Gesellschaft mit beschränkter Haftung Lingotière pour la coulée continue entre deux bandes, en particulier pour la coulée de l'acier
EP0271603B1 (fr) * 1986-12-19 1990-05-09 MANNESMANN Aktiengesellschaft Machine de coulée, pour métaux, avec élément de support mobile sans fin
JPH0636965B2 (ja) * 1987-01-27 1994-05-18 三菱重工業株式会社 ベルト式連続鋳造機
JPH05245590A (ja) * 1992-03-04 1993-09-24 Sumitomo Heavy Ind Ltd 連続鋳造用鋳片厚さ可変モールド
US6857464B2 (en) * 2002-09-19 2005-02-22 Hatch Associates Ltd. Adjustable casting mold

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH426115A (de) * 1965-02-02 1966-12-15 Alusuisse Verfahren zum Giessen von endlosen Metallsträngen auf einer Rotarymaschine und Rotarymaschine hierfür
US3538978A (en) * 1965-04-07 1970-11-10 Arnold H Boehm Method of rotatively casting continuous ingots
FR1483849A (fr) * 1966-04-08 1967-06-09 Siderurgie Fse Inst Rech Nouveau dispositif pour la coulée continue d'un métal
US3682228A (en) * 1971-03-11 1972-08-08 Phelps Dodge Copper Prod Method of continuous casting with circular trough mold
US3978909A (en) * 1974-01-02 1976-09-07 Allis-Chalmers Corporation Mold with convex sidewalls for continuous casting machines
DE2444269A1 (de) * 1974-09-17 1976-04-01 Metallgesellschaft Ag Verfahren zur herstellung seigerungsfreier, bandfoermiger gusstraenge
US4061177A (en) * 1975-04-15 1977-12-06 Alcan Research And Development Limited Apparatus and procedure for the belt casting of metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418160C2 (de) * 1994-05-25 2003-01-30 Sms Demag Ag Brammenstranggießkokille

Also Published As

Publication number Publication date
ATE19013T1 (de) 1986-04-15
ES8404886A1 (es) 1984-05-16
US4510990A (en) 1985-04-16
EP0104373A1 (fr) 1984-04-04
JPS5956951A (ja) 1984-04-02
ES525208A0 (es) 1984-05-16
DE3232147A1 (de) 1984-03-08
DE3232147C2 (de) 1984-12-06

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