EP2525928B2 - Segment de guidage pour guider et supporter de barre métallique dans une installation de coulée continue - Google Patents

Segment de guidage pour guider et supporter de barre métallique dans une installation de coulée continue Download PDF

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Publication number
EP2525928B2
EP2525928B2 EP11700831.8A EP11700831A EP2525928B2 EP 2525928 B2 EP2525928 B2 EP 2525928B2 EP 11700831 A EP11700831 A EP 11700831A EP 2525928 B2 EP2525928 B2 EP 2525928B2
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EP
European Patent Office
Prior art keywords
strand
rod
strand guide
outer frame
inner frame
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.)
Active
Application number
EP11700831.8A
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German (de)
English (en)
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EP2525928B1 (fr
EP2525928A1 (fr
Inventor
Josef Guttenbrunner
Christian Klopf
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.)
Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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Publication date
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing

Definitions

  • the present invention relates to a strand guide element for guiding and supporting a metallic strand in a continuous casting machine.
  • Strand-guiding elements for guiding and supporting a metallic strand in a curved or straight strand guide of a continuous casting machine are known to the person skilled in the art, inter alia, under the designations strand-guiding segment, strand-guiding element or segment.
  • a strand-guiding element has an inner frame and an outer frame (also referred to as inner-arch or outer-arch frame or as upper or lower frame in curved continuous casting plants), with the inner and outer frames each having a plurality of strand-guiding rollers for supporting and guiding the strand.
  • the strand-guiding element can typically be designed with an adjustment device either at one end or at both ends of the element, with the distance between the inner frame and the outer frame being transverse, i.e. normal, to the casting direction of the strand can be changed by the adjusting device.
  • a particularly simple construction of the strand guide element can be achieved if a bearing is arranged in the casting direction of the strand at one end of the strand guide element for the articulated connection of the inner frame to the outer frame, with such constructions also being referred to as so-called "Zangssegment", “Zangenbender” or "tong -type segment".
  • an articulated connection of the inner frame to the outer frame by means of a bearing means that the inner frame allows relative rotation relative to the outer frame, with this movement not necessarily having to be torque-free.
  • a disadvantage of the solutions according to the prior art is that mechanical play between the inner and outer frame is caused by manufacturing and application-related tolerances in the bearing or the adjustment device, so that a play-free connection between these components cannot be achieved.
  • This so-called “play”, which represents a mechanical hysteresis results in deviations in the thickness direction (i.e. between the set distance between the inner and outer frame and the thickness of the strand itself, so that the actual thickness deviates from the nominal thickness of the strand ) or in the transverse direction (i.e. between the thickness of the left and right strand cross-section), in both cases the strand has lower dimensional accuracy and thereby lower quality.
  • the object of the invention is to either significantly reduce the mechanical play of a bearing of a strand guide element for connecting the inner frame to the outer frame or to create a bearing that is completely free of play.
  • the bearing has at least one rod-shaped component, the first end of which is firmly clamped in the inner frame and the second end of which is firmly clamped in the outer frame, the rod-shaped component preventing the movement of the inner frame relative to the outer frame picks up.
  • a rod-shaped component i.e. a component whose longitudinal extent is greater than its transverse extent
  • the inner frame with the outer frame is free of play in the area of the bearing, i.e. both in the direction of thickness and in a direction transverse to the thickness and casting directions.
  • An advantageous embodiment consists in the rod-shaped component being designed as a bending rod, with the bending rod absorbing the bending stress during the movement of the inner frame relative to the outer frame.
  • Both the bending rod itself and its structural design are well known to the person skilled in the art, so that the bending rod can be easily adapted to the opening angle of the strand-guiding element that is to be expected.
  • the bending rod is designed as a leaf spring, a leaf spring assembly or a tension rod.
  • the mechanical stresses that occur in a leaf spring, a set of leaf springs or a tension rod are well known to those skilled in the art from the literature, so that these components can be adapted very well to the loads that occur.
  • the bearing also has a swivel joint, with the swivel joint representing an additional guide during the movement of the inner frame relative to the outer frame. This improves the guidance accuracy on the one hand and the axial guidance on the other hand when the inner frame rotates relative to the outer frame.
  • One embodiment consists in forming the rotary joint from a rotary eyelet and a rotary guide, the rotary eyelet being connected to the inner frame and the rotary guide being connected to the outer frame.
  • the swivel eye is connected to the outer frame and the swivel guide is connected to the inner frame.
  • an axis of rotation of the rotary joint is arranged coaxially, i.e. with matching axes of rotation, to an axis of rotation of a strand guide roller, preferably the first in the casting direction.
  • the rod-shaped component is designed as a torsion bar, with the torsion bar absorbing the torsional stress when the inner frame moves relative to the outer frame.
  • the torsion bar itself and its structural design are also well known to those skilled in the art, so that the torsion bar can be easily adapted to the expected opening angle of a strand-guiding element.
  • the torsion bar has a round, elliptical, rectangular or square solid or hollow cross section.
  • Round or elliptical cross-sections for example, have significantly lower stress concentration factors than square or rectangular cross-sections, so that torsion bars with these cross-sections can either be designed lighter or have a longer service life with the same average stresses.
  • the torsion bar is formed from a torsionally stiff element and a torsionally soft element, preferably a torsion spring.
  • a torsionally stiff element e.g. a torsion bar with full cross-section
  • very low rigidity of a torsionally soft element e.g. a torsion spring.
  • the terms torsionally stiff and torsionally soft are to be understood in relative terms, i.e. the torsional stiffness of the torsionally stiff element is significantly (e.g. 5 times) greater than the torsional stiffness of the torsionally soft element.
  • the bearing is arranged at the upper end and the adjustment device is arranged at the lower end of the strand guide element.
  • the fixed clamping takes place by means of a form-fitting or a friction-fitting connection; e.g. the first end and/or the second end of the rod-shaped component is positively or frictionally connected to the inner frame or the outer frame.
  • a form-fitting and a friction-fitting connection are well suited for clamping a rod-shaped component.
  • the adjusting device has a first end, at least one bending rod and a second end, with the first end of the adjusting device being firmly clamped in the inner frame and the second end of the adjusting device being firmly clamped in the outer frame, and the bending rod absorbing the bending stress during movement of the inner frame relative to the outer frame.
  • the adjusting device is designed as a pressure medium cylinder, the piston rod of which is designed as a flexible rod.
  • the piston rod of which is designed as a flexible rod.
  • the adjusting device For a high adjustment accuracy of the strand guide element, it is advantageous to form the adjusting device with a measuring device for measuring the distance between the inner frame and the outer frame. It is also advantageous to integrate the measuring device into the pressure medium cylinder or to measure directly on the piston or the tie rod (centrally).
  • a shim or an actuating element for adapting the strand-guiding element to different cast thicknesses is arranged between the rod-shaped component and the inner or outer frame.
  • strand-guiding element in a continuous casting machine for producing a strand, preferably with a cross-section for slabs or thin slabs, from steel.
  • the strand-guiding element at the same time as a bending segment for deflecting the strand from a vertical to a curved direction, with at least one strand-guiding roller being designed as a driven roller for this use.
  • the strand guide element can also be used at any other position in the strand guide where a greater reduction in thickness is to take place.
  • FIG. 1 shows a front view of a strand-guiding element designed as a strand-guiding segment 1 of a curved continuous casting machine for the production of steel slabs.
  • liquid steel is cast in a mold to form an at least partially solidified cast strand, which is guided, supported and further cooled in the subsequent curved strand guide formed from several strand guide segments that follow one another in the casting direction.
  • the cast strand enters the strand guide segment 1 from above in the casting direction 25 .
  • Both the inner frame 2 and the outer frame 3 have a plurality of strand guide rollers 4 for supporting and guiding the strand.
  • the distance in the thickness direction of the cast strand between the inner frame 2 and the outer frame 3 is adjusted by means of the adjusting devices 8, each designed as a pressure cylinder 22.
  • Each bearing 5 has a rod-shaped component 9 designed as a flexible rod 12, the first end 10 of which is firmly clamped in the inner frame 2 and the second end 11 of which is firmly clamped in the outer frame 3, the rod-shaped component 9 restraining the movement of the inner frame 2 relative to the outer frame 3 at a Change in distance in the thickness direction of the cast strand by means of the adjusting devices 8 absorbs.
  • a camp 5 from the 1 is in 2 enlarged again.
  • the rod-shaped component 9 is designed as a bending rod 12, which absorbs the bending stress that occurs during the movement of the inner frame relative to the outer frame.
  • the rod-shaped component 9 itself is firmly clamped in the inner frame 2 and in the outer frame 3, with the clamping being effected via two brackets 6, which are each firmly connected to the frame.
  • the outer frame 3 can be rotated by ⁇ 5° relative to the inner frame 2 about the bearing 5—the bearing 5 has a rotary joint 14 that includes a rotary eye 15 and a rotary guide 16 .
  • the bending rod is prestressed by means of the nuts 7 and is thus also a tension rod 13 the strand guide segment can be easily adapted to different strand thicknesses by means of the shims 24 . It is of course also possible to replace the shim 24 with an actuating element (eg a hydraulic cylinder) so that the adjustment can be automated, ie controlled or regulated.
  • FIG. 1 An alternative embodiment of a bearing 5 from the 1 is in 3 shown.
  • this bearing has no swivel joint and no shims, so that this embodiment can be manufactured particularly easily and inexpensively.
  • an actuating element eg a hydraulic cylinder
  • the adjustment can take place in an automated manner, ie in a controlled or regulated manner.
  • Each bearing 5 for connecting the inner frame 2 to the outer frame 3 has a rod-shaped component 9, the first end 10 of which is firmly clamped in the inner frame 2 by means of a bracket 6 and the second end 11 of which is firmly clamped in the outer frame 3 by means of a further bracket 6.
  • the rod-shaped component 9 is designed as a bending rod 12 so that the bending rod is subjected to bending stress when the inner frame 2 moves relative to the outer frame 3 .
  • the flexible rod 12 is a piston rod of an adjustment device, in which case the first end of the adjustment device is firmly clamped in the inner frame 2 and a second end of the adjustment device is firmly clamped in the outer frame 3.
  • the figure 5 shows a bottom view of the strand guide segment 1 .
  • a cast strand is - as in the 4 shown - supported and guided between a plurality of strand guide rollers 4 each assigned to the outer frame 3 and the inner frame 2, with the two adjustment devices 8 each being designed as pressure medium cylinders 22 and being arranged in the width direction of the cast strand in the region of the left and right end of the strand guide segment.
  • a front view of a strand guide segment 1 with a bearing 5 with a torsion bar 19 is shown in 6 shown.
  • the cast strand enters the strand guide segment 1 from above in the casting direction 25, the strand guide segment having an outer frame 3, an inner frame 2, two bearings 5 for the articulated connection of the outer frame to the inner frame and two adjusting devices 8, not shown.
  • Each bearing 5 has at least one rod-shaped component designed as a torsion bar 19, the first end 10 of which is firmly clamped in the inner frame 2 and the second end 11 of which is firmly clamped in the outer frame 3, with the torsion bar 19 absorbing the torsional stress during the movement of the inner frame 2 relative to the outer frame 3 .
  • a torsion bar 19 designed as a round hollow cross-section is connected on the one hand to the outer frame 3 via three screws 26 and on the other hand to the inner frame 2 via a press fit 27, with a first end of the torsion bar 19 in the inner frame 2 and a second end of the torsion bar 19 in the outer frame 3 is firmly clamped.
  • the torsion bar 19 is designed in such a way that it can absorb the torsional stress that occurs when the inner frame 2 moves relative to the outer frame 3 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Support Of The Bearing (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Metal Rolling (AREA)

Claims (14)

  1. Elément de guidage de barre destiné à guider et soutenir une barre métallique dans une machine de coulée continue, présentant
    - un châssis intérieur (2);
    - un châssis extérieur (3), le châssis intérieur (2) et le châssis extérieur (3) présentant respectivement plusieurs rouleaux de guidage de barre (4) pour guider et soutenir la barre;
    - au moins un palier (5) pour la liaison articulée du châssis intérieur (2) au châssis extérieur (3); et
    - un dispositif de réglage (8) pour modifier une distance entre le châssis intérieur (2) et le châssis extérieur (3), la modification de la distance étant effectuée dans une direction transversale à la direction de coulée (25),
    caractérisé en ce que le palier (5) présente au moins un composant en forme de barre (9), dont la première extrémité (10) est encastrée dans le châssis intérieur (2) et dont la deuxième extrémité (11) est encastrée dans le châssis extérieur (3), le composant en forme de barre (9) reprenant le mouvement du châssis intérieur (2) par rapport au châssis extérieur (3).
  2. Elément de guidage de barre selon la revendication 1, caractérisé en ce que le composant en forme de barre (9) est réalisé sous la forme d'une barre de flexion (12), la barre de flexion (12) reprenant la sollicitation de flexion lors du mouvement du châssis intérieur (2) par rapport au châssis extérieur (3).
  3. Elément de guidage de barre selon la revendication 2, caractérisé en ce que la barre de flexion (12) est réalisée sous la forme d'un ressort à lame, d'un paquet de ressorts à lame ou d'une barre de traction.
  4. Elément de guidage de barre selon l'une quelconque des revendications 2 à 3, caractérisé en ce que le palier (5) présente en outre une articulation rotative (14), l'articulation rotative (14) représentant un guidage supplémentaire lors du mouvement du châssis intérieur (2) par rapport au châssis extérieur (3).
  5. Elément de guidage de barre selon la revendication 4, caractérisé en ce que l'articulation rotative (14) est formée d'un œillet rotatif (15) et d'un guidage rotatif (16), l'œillet rotatif (15) étant relié au châssis intérieur (2) et le guidage rotatif (16) étant relié au châssis extérieur (3).
  6. Elément de guidage de barre présentant un rouleau de guidage de barre avec un axe de rotation associé (18) selon une des revendications 4 à 5, caractérisé en ce qu'un axe de rotation de l'articulation rotative (17) est colinéaire avec l'axe de rotation (18) d'un, de préférence premier dans la direction de coulée, rouleau de guidage de barre (4).
  7. Elément de guidage de barre selon la revendication 1, caractérisé en ce que le composant en forme de barre (9) est réalisé sous la forme d'une barre de torsion (19), la barre de torsion (19) reprenant la sollicitation de torsion lors du mouvement du châssis intérieur (2) par rapport au châssis extérieur (3).
  8. Elément de guidage de barre selon la revendication 7, caractérisé en ce que la barre de torsion (19) présente une section transversale ronde, elliptique, rectangulaire ou carrée, pleine ou creuse.
  9. Elément de guidage de barre selon l'une quelconque des revendications 7 à 8, caractérisé en ce que la barre de torsion (19) est formée d'un élément rigide à la torsion et d'un élément déformable par torsion, de préférence un ressort de torsion.
  10. Elément de guidage de barre selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le dispositif de réglage (8) présente une première extrémité (20), au moins une barre de flexion (12) et une deuxième extrémité (21), la première extrémité (20) étant encastrée dans le châssis intérieur (2) et la deuxième extrémité (21) étant encastrée dans le châssis extérieur (3) et la barre de flexion (12) reprenant la sollicitation de flexion lors du mouvement du châssis intérieur (2) par rapport au châssis extérieur (3).
  11. Elément de guidage de barre selon la revendication 10, caractérisé en ce que le dispositif de réglage (8) est réalisé sous la forme d'un cylindre à fluide sous pression (22) et la tige de piston (23) de celui-ci étant réalisée sous la forme d'une barre de flexion (12).
  12. Elément de guidage de barre selon l'une quelconque des revendications 1 à 11, caractérisé en ce qu'une cale (24) ou un élément d'actionnement est disposé entre le composant en forme de barre (9, 12, 13) et le châssis intérieur ou extérieur (2 ou 3), en vue de l'adaptation de l'élément de guidage de barre à différentes épaisseurs de coulée.
  13. Utilisation de l'élément de guidage de barre selon l'une quelconque des revendications 1 à 12 dans une machine de coulée continue pour la fabrication d'une barre, de préférence au format d'une brame ou d'une brame mince, en acier.
  14. Utilisation de l'élément de guidage de barre selon la revendication 13 comme segment de flexion pour la déviation de la barre d'une direction verticale à une direction courbe.
EP11700831.8A 2010-01-22 2011-01-12 Segment de guidage pour guider et supporter de barre métallique dans une installation de coulée continue Active EP2525928B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA85/2010A AT509351B1 (de) 2010-01-22 2010-01-22 Strangführungselement zum führen und stützen eines metallischen strangs in einer stranggiessmaschine
PCT/EP2011/050300 WO2011089045A1 (fr) 2010-01-22 2011-01-12 Élément de guidage de barre pour guider et étayer une barre métallique dans une machine de coulée continue

Publications (3)

Publication Number Publication Date
EP2525928A1 EP2525928A1 (fr) 2012-11-28
EP2525928B1 EP2525928B1 (fr) 2014-12-17
EP2525928B2 true EP2525928B2 (fr) 2022-06-15

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ID=43901418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11700831.8A Active EP2525928B2 (fr) 2010-01-22 2011-01-12 Segment de guidage pour guider et supporter de barre métallique dans une installation de coulée continue

Country Status (4)

Country Link
EP (1) EP2525928B2 (fr)
CN (1) CN102712037B (fr)
AT (1) AT509351B1 (fr)
WO (1) WO2011089045A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR101528074B1 (ko) * 2013-12-24 2015-06-10 주식회사 포스코 가이드 롤
CN104550800B (zh) * 2014-12-15 2016-09-21 中冶南方工程技术有限公司 一种板坯连铸弯曲段框架间隙调整装置
CN104607610A (zh) * 2015-01-28 2015-05-13 中国重型机械研究院股份公司 一种特厚板坯连铸机专用零号段设备

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DE2942144A1 (de) † 1979-10-18 1981-04-30 Schloemann-Siemag AG, 4000 Düsseldorf Stuetzfuehrung in einer stranggiessanlage
EP0117404B1 (fr) † 1983-02-02 1986-04-09 Sms Schloemann-Siemag Aktiengesellschaft Support de guidage dans une installation de coulée continue
DE69529513T2 (de) † 1994-07-29 2003-11-20 Sumitomo Metal Ind Verfahren zum kontinuierlichen giessen für dünnes gussstück

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DE2942144A1 (de) † 1979-10-18 1981-04-30 Schloemann-Siemag AG, 4000 Düsseldorf Stuetzfuehrung in einer stranggiessanlage
EP0117404B1 (fr) † 1983-02-02 1986-04-09 Sms Schloemann-Siemag Aktiengesellschaft Support de guidage dans une installation de coulée continue
DE69529513T2 (de) † 1994-07-29 2003-11-20 Sumitomo Metal Ind Verfahren zum kontinuierlichen giessen für dünnes gussstück

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Technological Packages for High Performance Slab Casting, B. Lindorfer et al. CCC 96 Linz/Austria, May 1996. Innovation Session, Paper No. 8. page 8 of 9 †

Also Published As

Publication number Publication date
AT509351B1 (de) 2013-11-15
CN102712037A (zh) 2012-10-03
EP2525928B1 (fr) 2014-12-17
CN102712037B (zh) 2015-05-06
EP2525928A1 (fr) 2012-11-28
WO2011089045A1 (fr) 2011-07-28
AT509351A1 (de) 2011-08-15

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