EP0184025A2 - Dispositif de guidage sur les bandes de coulée d'une lingotière de coulée continue à bande double - Google Patents

Dispositif de guidage sur les bandes de coulée d'une lingotière de coulée continue à bande double Download PDF

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Publication number
EP0184025A2
EP0184025A2 EP85114286A EP85114286A EP0184025A2 EP 0184025 A2 EP0184025 A2 EP 0184025A2 EP 85114286 A EP85114286 A EP 85114286A EP 85114286 A EP85114286 A EP 85114286A EP 0184025 A2 EP0184025 A2 EP 0184025A2
Authority
EP
European Patent Office
Prior art keywords
support
casting
mold space
mold
belt
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Withdrawn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
EP85114286A
Other languages
German (de)
English (en)
Other versions
EP0184025A3 (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
Publication of EP0184025A2 publication Critical patent/EP0184025A2/fr
Publication of EP0184025A3 publication Critical patent/EP0184025A3/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Withdrawn legal-status Critical Current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
    • B22D11/0637—Accessories therefor
    • B22D11/0677—Accessories therefor for guiding, supporting or tensioning the casting belts

Definitions

  • the invention relates to a guiding device on the casting belts of a double-strand continuous casting mold, the mold space of which is laterally delimited by articulated side dams adjoining the casting strips, with deflection drums arranged at the mold space inlet and outlet and between these arranged and opposing casting belt support rollers, between the deflection drum on the
  • the mold cavity entrance and the first support roller following in the casting direction is provided on each casting belt with an additional support equipped with ribs, which supports the casting belt transversely to the casting direction in the area of the mold space and the side dams.
  • Double-belt continuous casting molds are usually equipped with an upper and lower frame supporting the upper and lower casting belt, which are supported on one another via spacer bolts.
  • the gap of up to 0.1 mm between the lower edge of the support rollers for the upper casting belt and this gap is required to compensate for lateral displacements of the two casting belts by means of side edge control and shrinking processes within the mold space by inclining the guide rulers for the side dams can.
  • the pressurized molten steel penetrates into the gaps between the upper casting belt and the side dams in the inlet section of the mold space, solidifies there with the formation of thin tongue-like projections and thereby increases the height of the side dams.
  • the upper frame of the double belt continuous casting mold is raised with the result that the sealing gap set between the casting nozzle and the mold space increases, steel melt finally escapes to the outside and the casting process has to be interrupted.
  • the formation of the tongue-like approaches - the initial thickness of 0.3 to 0.5 mm is several times greater than the height of the gap set via the spacer bolts - is mainly caused by the knowledge on which the invention is based, due to the temperature distribution present in the casting belts.
  • the result of the cooling of the casting belts is that their side areas outside the mold space remain cold during the casting process, while the central sections in the area of the mold space are one by comparison have at least 100 ° C higher mean temperature.
  • the casting belt temperature prevailing in the mold area increases with the movement of the casting belt in the casting direction by more than 100 ° C.
  • This uneven temperature distribution in the transverse and longitudinal directions of the casting belts and the resulting changes in length lead to uncontrollable casting belt warping in the area of the mold cavity (i.e. in the area between the side dams), which allow molten steel to penetrate between the casting belt and the side dams.
  • the occurrence of the leaks between the mold walls may also be promoted in that the components interacting in the area of the mold space (casting belts, side dams, support rollers, support roller bearings) are necessarily manufactured and arranged with tolerances.
  • the resulting deviations add up in unfavorable cases such that gaps in the order of several tenths of a millimeter can form in an irregular distribution in the longitudinal direction of the mold space between the casting belts and the side dams.
  • the guide device of the type mentioned at the beginning of DE-AS 1 433 036 is equipped at the mold cavity entrance in the area behind the deflecting drums with additional supports in the form of ribbed additional support rollers, which partially support the upper or lower casting belt and protrude into the deflecting drums.
  • additional support rollers and the other support rollers are immovably mounted on the associated upper or lower frame of the double-belt continuous casting mold and can therefore prevent the formation of the casting belt mentioned do not prevent faults and gaps with the resulting adverse consequences.
  • the invention has for its object to design a guide device of the type mentioned in such a way that in particular the unavoidable different temperature distribution in the casting belts is taken into account.
  • the required seal between the casting belts and the side dams in the particularly vulnerable entry section behind the front deflection drums should also be ensured - regardless of any unfavorable tolerances that may exist - even if the mold walls are already exposed to a not inconsiderable ferrostatic pressure in the entry section of the mold room.
  • the guide device should also be designed so that adjustment processes in the area of the mold walls (side edge control of the casting belts, shrinkage compensation by inclining the guide rulers of the side dams) and temperature-related Ab changes in the measurement of the side dams are prevented as little as possible.
  • the object is achieved by a guide device on the casting belts of a double-strand continuous casting mold, which essentially has the features of claim 1.
  • the basic idea of the invention is then to provide an additional support in the form of a support carrier on each casting belt between the deflection drum at the mold space inlet and the first subsequent support roller in the casting direction, which supports the casting belt in question transversely to the casting direction (i.e. transversely to its longitudinal extent) in the area of the mold space and of the side dams supported resiliently and thereby counteracts the formation of undesirable leaks between the casting belts and the side dams immediately behind the relevant front deflection drum.
  • the inlet support rollers following the support beams in the inlet section of the mold space are held in a resilient manner in the area between the side dams on the relevant casting belt.
  • the inlet section (corresponding to the section of the path that the molten metal needs to form a sufficiently stable strand shell), up to which the resilient inlet support rollers extend, corresponds at most to the first quarter of the length of the mold space in the casting direction.
  • the resilient arrangement of the support beams and the subsequent entry support rollers ensures that - regardless of irregular casting belt warpage and tolerances between the interacting components - no gap can form between the casting belts and the side dams, in which the molten metal (in the case of molten steel is particularly thin).
  • All back-up rolls of each casting belt ie the resilient held entry back-up rolls and the subsequent rigid back-up rolls have support sections with a spherical (ie with a convex curve in the direction of the mold space) outer contour, the support sections being shorter than the width of the mold space.
  • the entry support rollers only pretension the casting belts via their spherical support sections in the direction of the longitudinal axis of the mold space: in addition to their support sections, support rails are additionally arranged which bear against the relevant casting belt on the side opposite the side dams.
  • the rigid support rollers following in the casting direction are designed in such a way that they also support the casting belts outside their spherical support sections in the region of the side dams.
  • the resilient support of the casting belts has in particular the result that they are additionally prestressed over the length of the entry section in the direction of the longitudinal axis of the mold space, that is to say assume a predetermined position; this at least hampers the development of uncontrollable bulges and faults in different directions.
  • the spherical outer contour of the support sections has the result that the associated casting belt initially only rests in the central region of the support section.
  • the casting belt in question is pressed to the required extent in the direction of the longitudinal axis of the mold space under the action of the spherical support sections, the undesired and uncontrollable turning of the casting belt from a convex into a concave Curvature is prevented.
  • the support rails cooperating with the resilient entry support rollers are preferably held in such a way that their position with respect to the casting belts and the side dams changes continuously in the vertical direction leaves.
  • the support rails can for this purpose be attached to set screws, via which, if necessary, a distance of the order of magnitude of at most a few hundredths of a millimeter can be set with respect to the associated casting belt.
  • the required mobility of the support beams and the subsequent entry support rollers can be achieved in a simple manner in that the guide components mentioned are held in straight guides, in particular pin guides.
  • the support beams and the entry support rollers are advantageously mounted on rockers which can be pivoted about fixed pivot axes in a plane perpendicular to the casting belt in question (claim 2).
  • the required contact pressure in the direction of the casting belt to be supported is preferably generated by means of plate spring assemblies, by means of which the guide components mentioned are supported on the stationary environment (ie on the upper or lower frame of the double belt continuous casting mold).
  • the movable guide components are expediently designed in such a way that the contact forces emanating from them can be changed continuously.
  • the contact pressure should be such that the casting belts are held in contact with the side dams despite the uneven temperature distribution during the casting process will.
  • the double belt continuous casting mold equipped with the guide device has a mold space 1 with a longitudinal axis 1a, which is delimited at the top and bottom by an endless casting belt 2 or 3 and laterally by two endless articulated side dams 4 with block-shaped dam members 4a is; these run in the area of the mold space between the casting belts 2 and 3 (FIG. 1).
  • the mold walls 2 to 4 move in the same way in the casting direction (arrow 5) from left to right in the area of the mold space.
  • the casting belts are supported on upper and lower deflection drums 6, 7 and 8, 9 with fixed axes of rotation 6a, 7a and 8a, 9a.
  • the upper pulleys rotate counterclockwise, the lower pulleys clockwise.
  • the molten steel to be processed is introduced into the mold space 1 by means of a tubular pouring nozzle (not shown) in the area between the front deflection drums 6 and 8, forms a strand shell, which becomes thicker in the casting direction, from the mold walls 2, 3 and 4 and leaves the mold space in Area of the rear guide drums 7, 9 as a sufficiently solidified strand.
  • the following guide components are lined up in the casting direction (arrow 5) in connection with the front deflecting drums 6 and 8: supporting supports 11 which are effective and resiliently held in abutment, several resiliently, as additional supports Movable entry support rollers 12 and rigid support rollers 13 held in contact, which extend into the vicinity of the rear guide drums 7 and 9, respectively.
  • the support beams 11 are adapted on their end faces the deflection drums 6 and 8 to the shape of the associated deflection drum, so that they can support the casting belt section 2a or 3a as directly as possible after this.
  • All guide components 11 to 13 are either movable via spring elements 14 or 15 or immovably connected to the upper or lower frame of the double belt continuous casting mold.
  • the movable guide components 11 and 12 have a guide which essentially only permits tracking movements transverse to the longitudinal extension of the casting belt section 2a or 3a.
  • the tracking movement of the guide components 11 and 12 in the direction of the mold space 1 can be realized in a particularly simple manner in that they are held in a guide path (not shown) which runs perpendicular to the plane of the relevant casting belt section.
  • the support effect of the rigid support rollers 13 thus - in contrast to the resilient inlet support rollers 12 - also covers the area of the casting belt sections which extends beyond the width B of the mold space (cf. FIGS. 4a, b) goes.
  • FIGS. 2a, b two wide support strips 16 and two narrow web strips 17 are fastened to the movably held support beam 11 by screwing.
  • the support strips 16 are arranged in such a way that they abut the casting belt section 2a above the dam members 4a.
  • the webs 17a of the web strips 17 support said casting belt section in the area between the vertical central plane 1b through the mold space 1 and the dam members 4a (FIG. 2b).
  • the support bracket 11 is equipped near its front face 11a in the casting direction with bolts 18 which are supported on a rocker arm 20 by means of bearing sleeves 19 with a spherical surface, forming a ball joint.
  • the support bracket 11 can perform tracking movements with respect to the casting belt section 2a, which are determined by the mobility of the two rockers 20.
  • the rotary connection between these and the support beam ensures that it can always adjust parallel to the casting belt section 2a to be supported.
  • the length of the support beam 11 in the casting direction (cf. FIG. 1) is preferably larger than the mutual distance between two successive entry points.
  • the design, arrangement and mode of operation of the support beam 11 for the casting belt section 3a of the lower casting belt 3 corresponds to the embodiment just described with the proviso that the support beam 11 with the associated components lies below the casting belt section 3a and is movable on the subframe, not shown, of the double-strand continuous casting mold is attached.
  • the movable inlet support rollers 12 shown in FIG. 3a, b as an example for the casting belt section 2a of the upper casting belt 2 are held on rockers 28 on both sides by means of self-aligning roller bearings 26 and bearing journals 27. These, in turn, can be rotated on bearing bushes 29 about support pins 30, which are screwed on their outside to the upper frame 23 of the double-belt continuous casting mold.
  • the range of motion of the rockers 28 can be changed by means of adjusting screws 31, which - the rocker 28 penetrating with play in its central part 28a (cf. FIG. 3b) - are held in threaded bores 32a of a bracket 32; this bridges the gap between the inlet support rollers 12 and the upper frame 23 to which it is attached.
  • the adjusting screws 31 are supported by a joint support consisting of two disks 33, 34 with a convex or concave contact surface in a recess 28b of the middle part 28a (Fig. 3b).
  • each rocker 28 In its inner end section 28c, which is connected to the bearing journal 27, each rocker 28 has a recess 28d which receives a plate spring assembly 35. This is supported via two centering disks 36, 37 with a convex or concave contact surface via a clamping plate 38 on a clamping screw 39 held in the end section 28c.
  • the plate spring assembly 35 is centered by means of a centering bolt 40 fastened to the bracket 32.
  • the prestressing in the plate spring assembly 35 can be changed continuously by turning the tensioning screw 39.
  • the end position of each rocker 28 and the associated entry support roller 12 can be determined by turning the adjusting screw 31.
  • the number and arrangement of the inlet support rollers 12, which are movably held in contact with the casting belt section 2a, are selected such that they, including the preceding additional support in the form of the support beam 11, capture the inlet section of the mold space 1.
  • the entry section extends at most over the first quarter of the length of the mold space.
  • the inlet support rolls 12 (and correspondingly the rigid support rolls 13) have a support section 12a - consisting of adjacent support ribs 12b - which is shorter than the width B of the mold space 1.
  • the support ribs 12b which form the casting belt section 2a or 3a only support in the area of the mold space 1, together form a spherical outer contour 12c, ie their circumferential surfaces together describe a curve which is convexly curved with respect to the entry support roller 12 (or the rigid support roller 13).
  • the support rails 10 already mentioned are provided in addition to the support sections 12a of the inlet support rollers 12. These are intended to ensure that the casting belt sections 2a and 3a adjoin the support members 11 (see FIG. 1) - if need be with very little freedom of movement - against the dam members 4a, to the end of the entrance section of the mold space 1.
  • the support rail 10 shown in FIG. 5 by way of example for the upper casting belt section 2a is equipped with two guide bolts 41 rigidly attached to it. These have two threaded sections 41b and 41c separated from one another by a centering section 41a above the support rail.
  • the centering section is movably guided in a bracket 42 and held there by two adjusting nuts 43.
  • the adjusting nuts engaging in the threaded sections 41b, c are supported on the console 42 on different sides thereof.
  • the position of the guide rail 10 with respect to the casting belt section 2a shown can be changed continuously by appropriate rotation of the adjusting nuts 43.
  • the brackets 42 like the other stationary components of the guide device, are on the upper frame (and, in so far as the casting belt section 3a located below) is attached to the subframe) of the double belt continuous casting mold.
  • the length of the support rails 10 in the casting direction is dimensioned such that they bridge approximately the space between the support carrier 11 and the first rigid support roller 13 in the casting direction (arrow 5) (cf. FIG. 1).
  • the representation according to FIG. 4a shows the support effect of an inlet support roller 12 before the start of casting.
  • the casting belt sections 2a and 3a of the casting belts which have not yet been heated are still unstretched and run in a straight line over the width B of the mold space 1.
  • the entry support rollers 12, which are held in a resilient manner, cannot press the casting belt sections in the direction of the mold cavity longitudinal axis 1a and consequently only touch the casting belt sections with the support ribs 12b, which are in the vicinity of the vertical central plane 1b through the mold cavity 1.
  • the casting belt sections 2a and 3a experience thermal expansion under the action of the steel melt located in the mold space 1.
  • the inlet support rollers 12 can move in the direction of the mold cavity longitudinal axis 1a and support the casting belt sections between the side dams or dam members 4a against the pressure emanating from the mold cavity 1 via their support ribs 12b (FIG. 4b).
  • the resilient contact of the spherical outer contour 12c supporting sections 12a ensures that the heat-stretched casting sections 2a and 3a are always held in a defined position with respect to the dam members 4a, the undesirable bulges and turnover processes and thus the formation of leaks between the casting belt sections and the Dam lines prevented.
  • the advantage achieved with the use of resiliently supported support beams and inlet support rollers is that dimensional deviations between the components interacting in the area of the mold space and heat-related casting belt deformations cannot lead to the formation of leaks in the area of the side dams.
  • the casting belt deformations can be compensated for by means of the spherical support sections provided on all the support rollers without the formation of undesirably sharp transitions: the spherical support sections press the casting belt in question in the direction of the mold space longitudinal axis as the heating progresses, preventing undesired and uncontrollable turnover movements of the casting belt will.
  • the guide device according to the invention is used particularly advantageously in those cases in which molten metal - in particular low-viscosity molten metal such as molten steel - enters the mold space under pressure to achieve perfect products and deforms the flexible casting belts to an undesirable extent without special countermeasures; however, even if molten metal is supplied without pressure, it ensures that no leaks can occur in the particularly vulnerable entry section of the mold space between the mold walls, which necessitate an early termination of the casting process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP85114286A 1984-12-07 1985-11-09 Dispositif de guidage sur les bandes de coulée d'une lingotière de coulée continue à bande double Withdrawn EP0184025A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3444689 1984-12-07
DE19843444689 DE3444689A1 (de) 1984-12-07 1984-12-07 Fuehrungseinrichtung an den giessbaendern einer doppelbandstranggiesskokille

Publications (2)

Publication Number Publication Date
EP0184025A2 true EP0184025A2 (fr) 1986-06-11
EP0184025A3 EP0184025A3 (fr) 1987-05-13

Family

ID=6252164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114286A Withdrawn EP0184025A3 (fr) 1984-12-07 1985-11-09 Dispositif de guidage sur les bandes de coulée d'une lingotière de coulée continue à bande double

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Country Link
US (1) US4679612A (fr)
EP (1) EP0184025A3 (fr)
DE (1) DE3444689A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4901785A (en) * 1988-07-25 1990-02-20 Hazelett Strip-Casting Corporation Twin-belt continuous caster with containment and cooling of the exiting cast product for enabling high-speed casting of molten-center product
DE102009030793A1 (de) * 2009-06-27 2010-12-30 Sms Siemag Ag Vorrichtung und Verfahren zum horizontalen Gießen eines Metallbandes
US7888158B1 (en) * 2009-07-21 2011-02-15 Sears Jr James B System and method for making a photovoltaic unit
US20110036531A1 (en) * 2009-08-11 2011-02-17 Sears Jr James B System and Method for Integrally Casting Multilayer Metallic Structures
US20110036530A1 (en) * 2009-08-11 2011-02-17 Sears Jr James B System and Method for Integrally Casting Multilayer Metallic Structures
KR101526450B1 (ko) * 2013-09-10 2015-06-05 주식회사 포스코 이송롤러 정렬상태 측정장치
CA3073175C (fr) * 2017-08-16 2022-11-01 Novelis Inc. Commande de trajet de coulee a courroie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758957A1 (de) * 1968-09-07 1971-04-01 Schloemann Ag Stranggiesskokille
DE1433036B2 (de) * 1960-12-08 1971-09-30 Hazelett Strip Casting Corp , Winooski, Vt (V St A) Kuehlvorrichtung fuer endlose giessbaender
DE1558259B2 (de) * 1966-04-08 1974-03-07 Institut De Recherches De La Siderurgie Francaise, Saint-Germain-En-Laye, Yvelines (Frankreich) Vorrichtung zum kontinuierlichen Gießen von Metall
DE2848133A1 (de) * 1977-11-16 1979-05-17 Metallurgie Hoboken Verfahren und vorrichtung zur kontinuierlichen herstellung von metallanoden aus schmelzfluessigem metall
EP0070138A2 (fr) * 1981-07-09 1983-01-19 Hazelett Strip-Casting Corporation Procédé et appareil pour couler des bandes avec oreilles latérales
DE3342941C1 (de) * 1983-11-26 1984-12-06 Fried. Krupp Gmbh, 4300 Essen Pruefeinrichtung zur Feststellung von Beschaedigungen an den Giessbaendern einer Stranggiesskokille

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH426114A (de) * 1964-12-11 1966-12-15 Alusuisse Verfahren zum Giessen von bandförmigen breiten Metallplatten und Maschine hierfür
US4190103A (en) * 1975-04-15 1980-02-26 Alcan Research And Development Limited Continuous casting of metal strip between moving belts
US4193440A (en) * 1978-09-01 1980-03-18 Alcan Research And Development Limited Belt-cooling and guiding means for the continuous belt casting of metal strip
US4552201A (en) * 1981-12-14 1985-11-12 Hazelett Strip-Casting Corp. Methods for shaping the casting region in a twin-belt continuous casting machine for improving heat transfer and product uniformity and enhanced machine performance
JPS58110161A (ja) * 1981-12-23 1983-06-30 Hitachi Ltd 連続鋳造装置
JPS58110163A (ja) * 1981-12-23 1983-06-30 Hitachi Ltd 連続鋳造装置
DE3407139A1 (de) * 1984-02-28 1985-05-23 Fried. Krupp Gmbh, 4300 Essen Fuehrungseinrichtung an den giessbaendern einer doppelbandstranggiesskokille

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1433036B2 (de) * 1960-12-08 1971-09-30 Hazelett Strip Casting Corp , Winooski, Vt (V St A) Kuehlvorrichtung fuer endlose giessbaender
DE1558259B2 (de) * 1966-04-08 1974-03-07 Institut De Recherches De La Siderurgie Francaise, Saint-Germain-En-Laye, Yvelines (Frankreich) Vorrichtung zum kontinuierlichen Gießen von Metall
DE1758957A1 (de) * 1968-09-07 1971-04-01 Schloemann Ag Stranggiesskokille
DE2848133A1 (de) * 1977-11-16 1979-05-17 Metallurgie Hoboken Verfahren und vorrichtung zur kontinuierlichen herstellung von metallanoden aus schmelzfluessigem metall
EP0070138A2 (fr) * 1981-07-09 1983-01-19 Hazelett Strip-Casting Corporation Procédé et appareil pour couler des bandes avec oreilles latérales
DE3342941C1 (de) * 1983-11-26 1984-12-06 Fried. Krupp Gmbh, 4300 Essen Pruefeinrichtung zur Feststellung von Beschaedigungen an den Giessbaendern einer Stranggiesskokille

Also Published As

Publication number Publication date
DE3444689C2 (fr) 1987-08-13
EP0184025A3 (fr) 1987-05-13
US4679612A (en) 1987-07-14
DE3444689A1 (de) 1986-01-16

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