EP3235579A1 - Dispositif de guidage de barre et procédé destiné à supporter une barre de coulée - Google Patents

Dispositif de guidage de barre et procédé destiné à supporter une barre de coulée Download PDF

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Publication number
EP3235579A1
EP3235579A1 EP17163459.5A EP17163459A EP3235579A1 EP 3235579 A1 EP3235579 A1 EP 3235579A1 EP 17163459 A EP17163459 A EP 17163459A EP 3235579 A1 EP3235579 A1 EP 3235579A1
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EP
European Patent Office
Prior art keywords
strand
guide roller
outer contour
guide
casting
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
EP17163459.5A
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German (de)
English (en)
Other versions
EP3235579B2 (fr
EP3235579B1 (fr
Inventor
Jörn HOFFMEISTER
Dirk Letzel
Thomas Thomas Marx
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.)
SMS Group GmbH
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SMS Group GmbH
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Publication date
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Priority claimed from DE102017200983.7A external-priority patent/DE102017200983A1/de
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3235579A1 publication Critical patent/EP3235579A1/fr
Application granted granted Critical
Publication of EP3235579B1 publication Critical patent/EP3235579B1/fr
Publication of EP3235579B2 publication Critical patent/EP3235579B2/fr
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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
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
    • 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 invention relates to a strand guiding device for supporting a cast strand with rectangular cross section according to the preamble of claim 1 and according to the preamble of claim 3, and a corresponding method.
  • strand guiding devices are known in the continuous casting of slabs with a rectangular cross-section, in which guide rollers, so-called casters, are used with a cylindrical outer contour for strand support on the narrow side of the strand box box.
  • Fig. 8 is such a guide roller having a cylindrical outer contour, shown in cross section.
  • a method and an apparatus for producing continuous cast starting material are known.
  • a cast strand of a Pre-profiling subjected by rollers with convex outer contour are pressed into the surface of the strand shell on the long side.
  • a concave groove is formed on the surface of the casting strand on its longitudinal side, wherein the concave groove is enlarged or reshaped by the use of further rolls with a larger diameter.
  • DE 195 20 939 C1 shows a generic strand guide device with the features of the preamble of claim 1 and of claim 3.
  • the outlet side of the continuous casting mold support provided on which rollers are arranged to guide the strand.
  • the carrier and thus the rollers attached thereto, can be adjusted transversely to the drawing direction of the strand.
  • the individual rollers which are mounted rotatably mounted on the respective carriers, each having a cylindrical cross-section, and thus are subject to the disadvantages mentioned above.
  • the invention has for its object to optimize the desired accuracy in the continuous casting of a cast strand with simple means.
  • a strand guiding device serves to support a casting strand having a rectangular cross-section, namely, when the casting strand emerges from the continuous casting mold in a conveying or drawing direction.
  • the strand guiding device comprises at least one Guide roller which is rotatably mounted about an axis of rotation, wherein the guide roller can be brought with its running in the direction of the axis of rotation outer contour with the casting strand in contact to guide the cast strand suitable and support.
  • the outer contour of the guide roller is crowned convex and designed such that it is adapted with its longitudinal extent along the axis of rotation to a narrow side of the rectangular casting strand.
  • the convex outer contour of the guide roller is formed such that the largest diameter of the outer contour of the guide roller compared to a diameter of the guide roller at the roller ends, i. on its front side, the maximum value is 1.5 and minimum assumes the value 1.0.
  • this comprises at least one guide roller which is rotatably mounted about a rotation axis, wherein the guide roller can be brought into contact with the casting strand with its outer contour running in the direction of the rotation axis in order to guide and support the casting strand in a suitable manner ,
  • the outer contour of the guide roller is convexly convex, wherein the largest diameter of the outer contour of the guide roller compared to a diameter of the guide roller at the roll ends, ie at its end in the ratio of at most 1.5 and minimally takes the value 1.0.
  • a guide roller can be provided to be employed either against the narrow side of a casting strand or against the longitudinal side of a casting strand.
  • the outer contour of the guide roller is designed such that it is adapted with its longitudinal extent along the axis of rotation to a narrow side of the rectangular casting strand.
  • the present invention also provides a method for supporting a cast strand having a rectangular cross-section, wherein at least one rotatably mounted guide roller has a convex convex outer contour and the guide roller is made with this outer contour against one side of the cast strand, during the cast strand, after emerging from the continuous casting mold, in a near-edge region still has elastic properties.
  • the guide roller can be made against a narrow side of the cast strand or against a longitudinal side of the cast strand. It can also be provided a plurality of guide rollers, each with a convex convex outer contour, wherein at least one guide roller is employed against a narrow side of the cast strand, and wherein at least one further guide roller is employed against a longitudinal side of the cast strand.
  • the invention is based on the essential finding that the strand shell of the cast strand, as long as this immediately after leaving the continuous casting mold in a near-edge region still has elastic properties, by contact with the guide rollers, which as explained have a convex convex outer contour, a specifically concave shape is forced, which counteracts the tendency of the strand shell to bulge.
  • the measure of the crown of the outer contour of a guide roller is suitably matched to the respective production parameters and the steel grade produced.
  • the convex convex outer contour of a guide roller is optimized for the individual problem posed by a specific steel grade and its production parameters. Accordingly, the convex outer contour of a guide roller can be made different in adaptation to the individual case, wherein the ratio of the largest diameter of the roller surface to the diameter of the roller surface at the roller ends, i. moved at an end face of the guide roller in the range between 1.5 and 1.0. Within this range of the two mentioned diameter relative to each other, the outer contour of the guide roller can be adapted to the particular application suitably.
  • the bulge of the casting strand or a slab can be compensated without excessive edge effects.
  • the at least one guide roller of the strand guiding device is received rotatably mounted in a cage holder.
  • Such cage mounting is characterized by a robust and inexpensive construction, and ensures a safe rotation support for the guide roller, taking into account the considerable forces acting on the guide roller during continuous casting.
  • a plurality of guide rollers are each provided with a convex convex outer contour, wherein at least one guide roller is employed against the narrow side of a cast strand, and wherein at least one further guide roller is employed against the longitudinal side of the cast strand.
  • the tendency of the strand shell of a casting strand to bulge can be counteracted according to an advantageous embodiment of the invention in that a plurality of guide rollers are provided, namely in the transport direction of the casting strand in alignment one behind the other. Conveniently, all of these guide rollers are rotatably supported together in a cage holder of the strand guide device.
  • guide rollers which are arranged in alignment one behind the other, each provided with a different convex convex outer contour. Accordingly, there are different contour characteristics with respect to their convex convex outer contour for the aligned successively arranged guide rollers.
  • the quotient formed from the largest diameter of the outer contour or the roller surface to the diameter of the guide roller is greater at its end face compared to a guide roller, which - seen in the transport direction of the casting strand - is closer to the continuous casting mold.
  • the A plurality of guide rollers with a crown which increases in the transport direction of the casting strand, achieved a gentle support for the strand shell of the casting strand, while counteracting the unwanted bulging of the strand shell.
  • a connecting device is provided, with which the strand guiding device can be attached to a continuous casting mold or adjacent thereto form-fitting manner.
  • the guide rollers are subjected to pronounced wear during continuous casting. Accordingly, it is possible by the connecting means to disassemble the strand guide device when required from the continuous casting mold, and replace it with a new strand guiding device.
  • a lifting device for the strand guiding device can be provided, by means of which the strand guiding device can be lifted upwards in the vertical direction.
  • Such a lifting device may be designed as a ring eye, which may be e.g. attachable to a top of the cage cage, e.g. through a screw connection.
  • the strand guiding device By equipping the strand guiding device according to the invention with the said connecting device, it is thus possible to provide a replaceable roller unit for continuous casting, which can be exchanged in a short time if necessary - either in the case of wear or for adaptation to special steel grades.
  • the strand guiding device by means of the lifting device by a crane or the like can be lifted vertically upwards from the continuous casting mold.
  • the strand guiding device also comprises an elongate copper plate, which - seen in the transport direction of the casting strand - upstream of the guide roller (s) is provided.
  • the copper plate may be attached to said cage holder.
  • the cage cage in which at least one Guide roller is stored rotatably mounted, and attached thereto copper plate an advantageous replacement module that can be quickly disassembled if necessary from the continuous casting mold and thus can be replaced.
  • the present invention provides a strand guiding device 10 for guiding and supporting a cast strand 12, the strand guiding device 10 having at least one rotatably mounted guiding roll 14 for this purpose.
  • a guide roller 14 In each case different embodiments for a guide roller 14 are shown in cross section.
  • the guide rollers 14 are each rotatably mounted about a rotation axis 16, and have one in the longitudinal extent along the axis of rotation 16 extending outer contour 18 which is convex convex.
  • a maximum diameter D_max of a guide roller 14, which is present approximately in a central region 20 thereof, is greater than a minimum diameter D_min of the guide roller, which is present at a roller end or at an end face 19 of the guide roller 14.
  • the formation of the convex convex outer contour 18 of a guide roller 14 is selected such that the ratio of the maximum diameter D_max of the roller surface to the minimum diameter at a roller end or at an end face of the guide roller 14 fulfills the condition: 1 . 5 ⁇ d_max / d_min ⁇ 1 . 0th
  • FIGS. 1a, 1b or 1c illustrates that the radii for the convex outer contour 18, with each of which the crowning for the individual guide rollers 14 is defined, are different.
  • Fig. 1a and Fig. 1b has the outer contour 18 of the guide roller 14, starting from their end faces 19 initially a constant diameter.
  • This area, in which the outer contour 18 is initially cylindrical, can have a longitudinal extent of between 5 and 50 mm. Only after this cylindrical area, the outer contour 18 assumes a curved course, as explained in convex convex shape.
  • Fig. 1 b assumes the diameter of the outer contour 18 of the guide roller 14, starting from the end face 19 in the direction of the central region 20 to a turning point W, from this inflection point, the increase or the increase of the diameter decreases until reaching the central region 20 again.
  • the curved course of the outer contour 18 up to the point of inflection W, starting from the end face 19, is defined by a first Radius R1 defined, wherein the curved course of the outer contour 18 between the inflection point W and the central region 20 is defined by a second radius R2.
  • the first and second radius R1, R2 can each assume a value of 1 mm or more, which ensures "soft" curves for the outer contour 18.
  • radii R1, R2 and the inflection point W are shown only for the area of the guide roller 14 to the left of the center. It is understood that the guide roller 14 is preferably formed symmetrically with respect to its center, so that the radii R1, R2 and the inflection point W for the outer contour 18 are also provided in the region to the right of the center.
  • FIG. 1 b Another feature of the embodiment according to Fig. 1 b is that the central region 20 of the outer contour 18 of the guide roller 14 has a fixed diameter, and is thus cylindrical.
  • the embodiment according to Fig. 1c is characterized in that its outer contour 18 is formed by a continuous convexly outwardly curved curve without inflection point, said curve may have one or more radii.
  • This curved outward curve may have a predetermined distance from the end face 19 of the guide roller 14, wherein in the illustration according to FIG Fig. 1 c this predetermined distance has the value zero.
  • the convexly outwardly curved curve immediately at the end faces 19 of the guide roller 14, and then extends in the direction of the central region 20.
  • the predetermined distance to the end face 19, on which the outwardly curved curve for the outer contour 18 begins has a value of up to 50 mm.
  • Fig. 1b a combination of Fig. 1b and Fig. 1c possible.
  • the outwardly curved curve of the outer contour 18, as in Fig. 1c illustrated in its central region 20 may have a cylindrical portion of fixed diameter, as in the Fig. 1 b illustrated.
  • a guide roller 14 of the strand guide device 10 is used for the purpose of being employed against a strand shell box 21 of the casting strand 12.
  • a guide roller 14 against a narrow side 22 of the casting strand 12 which has a rectangular cross-section, is pressed or employed. It can be seen that in this case a length of the guide roller 14 along its axis of rotation 16 is shorter than a length of the narrow side 22 of the cast strand 12. In this way, the outer contour 18 of a guide roller 14 with its longitudinal extent along the axis of rotation 16 to the narrow side 22 of Casting strand 12 adapted with rectangular cross section.
  • Fig. 1a-1 c is symbolized by the reference numeral "23" in each case a still liquid bottom of the casting strand 12.
  • Fig. 2 shows a further embodiment of a strand guiding device 10 according to the invention, here both in a perspective view (upper area of Fig. 2 ) as well as in a side view (lower area of Fig. 2 ).
  • the strand guiding device 10 comprises a cage holder 24, on or in which a plurality of guide rollers 14 are mounted rotatably mounted.
  • a copper plate 26 is provided, which is attached to the cage holder 24.
  • the copper plate 26 is provided upstream of the cage holder 24.
  • a strand guide device 10 For the embodiment of a strand guide device 10 according to Fig. 2 It should be noted separately that the combination of a cage holder 24 with a copper plate 26 attached thereto forms an exchange module 27 which can be exchanged or replaced as needed in a short time.
  • this replacement module 27 can - according to the representation of Fig. 2 - Be provided that on the cage holder 24 a plurality of guide rollers 14 is mounted. Deviating from the illustration in Fig. 2 can also be provided that only a single guide roller 14 is mounted rotatably mounted on the cage holder 24.
  • the strand guiding device 10 as an exchange module 27 is made possible by the fact that it has a connecting device 28, by means of which the strand guiding device 10 is attached to a continuous casting mold 30 (FIG. Fig. 3 ) or adjacent to it can be positively attached.
  • this connecting device is designed in the form of a lateral bolt 28, which can engage in a holding device 29 of the continuous casting mold 30, which is complementary thereto, or an associated adjusting element 31.
  • a lifting device 32 On an upper side of the copper plate 26 is a lifting device 32, for example in the form of a ring eye, screwed.
  • the strand guide device 10 can be lifted by a crane or the like in the vertical direction to be either inserted into or lifted out of the continuous casting mold 30.
  • a strand guiding device 10 can be attached to the continuous casting mold 30.
  • a strand guiding device 10 is shown in such a way that its bolts 28 are located just above the holding devices 29 which are provided at the free ends of the respective adjusting elements 31.
  • a strand guide device 10 is shown in a state when it is lifted out of the continuous casting mold 30.
  • FIG. 4 shows a perspective view of the continuous casting mold 30 of Fig. 3 Now in a state when two strand guiding devices 10 are mounted on the adjusting means 31 of the continuous casting mold 30 and mounted. in this connection Then the bolts 28 are respectively engaged in the associated holding devices 29, resulting in a positive attachment of the strand guide device 10 to the continuous casting mold 30 results.
  • Fig. 5 shows a further perspective view of the continuous casting mold 30, now in a state when both strand guide devices 10 are lifted up out of the continuous casting mold 30.
  • a lifting out of the strand guiding devices 10 can take place in that traction means are attached to the ring eyes 30 and subsequently pulled upwards by a crane or the like.
  • the Fig. 6 and Fig. 7 each show a perspective view of the continuous casting mold 30 of Fig. 3 in a state when a front part 34 of the continuous casting mold 30 is mounted thereon.
  • the strand guiding devices 10 are shown in FIG Fig. 6 lifted out of the continuous casting mold 30 (in the same manner as in Fig. 5 ), and in the presentation of Fig. 7 used within the continuous casting mold.
  • this direction is in the illustration of Fig. 7 symbolized by the arrow "T".
  • the strand guiding devices 10 when mounted in the continuous casting mold 30, serve to guide and thereby suitably support a cast strand having a rectangular cross section on the narrow side thereof.
  • the guide rollers 14 of the strand guiding devices 10 come into contact with the casting strand 12 immediately after the casting strand 12 has emerged from the continuous casting mold 30. Accordingly, an edge region of the cast strand 12, with which the convex-convex guide rollers 14 come into contact, still has elastic properties.
  • a strand guiding device 10 may also have a guide roller which is brought into contact with a longitudinal side of the casting strand 12.
  • a guide roller 15 also has a convex convex outer contour, as described above with reference to Fig. 1 explained, and serves to ensure that the introduction of a targeted concave embossing in the longitudinal side of the casting strand counteracts the tendency of bulging of the strand shell and thus compensates for such bulging.
  • the operation of a guide roller 15, which is brought into contact with the longitudinal side of a cast strand mutatis mutandis the operation of a guide roller 14, which is employed against the narrow side 12 of the casting strand 12.
  • a strand guiding device 10 for supporting a cast strand 12 having a rectangular cross-section a plurality of guide rollers 14, 15 may have, which are employed both against the narrow side 22 of the casting strand 12 and against the longitudinal side of the casting strand 12, namely at a time when the casting strand 12 still has elastic properties on its narrow side and longitudinal side in regions near the edge.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
EP17163459.5A 2016-04-18 2017-03-29 Dispositif de guidage de barre et procédé destiné à supporter une barre de coulée Active EP3235579B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016206454 2016-04-18
DE102017200983.7A DE102017200983A1 (de) 2016-04-18 2017-01-23 Strangführungseinrichtung und Verfahren zum Stützen eines Gießstrangs

Publications (3)

Publication Number Publication Date
EP3235579A1 true EP3235579A1 (fr) 2017-10-25
EP3235579B1 EP3235579B1 (fr) 2020-05-13
EP3235579B2 EP3235579B2 (fr) 2023-08-30

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EP17163459.5A Active EP3235579B2 (fr) 2016-04-18 2017-03-29 Dispositif de guidage de barre et procédé destiné à supporter une barre de coulée

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837392A (en) * 1971-11-18 1974-09-24 I Rossi Apparatus for continuously casting steel slabs
WO1995020448A1 (fr) * 1994-01-28 1995-08-03 Mannesmann Ag Installation de coulee continue pour guider du metal coule en continu
DE4403047C1 (de) * 1994-01-28 1995-08-10 Mannesmann Ag Strangführungsgerüst
DE4403046C1 (de) * 1994-01-28 1995-08-17 Mannesmann Ag Rolle für ein Strangführungsgerüst
DE19520939C1 (de) 1995-06-02 1996-07-25 Mannesmann Ag Verstelleinrichtung für Führungsrollen in Stranggießanlagen
DE10119550A1 (de) 2001-04-21 2002-10-24 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen von Stranggu-Vormaterial

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3900066A (en) 1974-01-02 1975-08-19 Allis Chalmers Apparatus for continuous casting a metal strand shaped to provide concave surfaces
GB1596395A (en) 1977-12-14 1981-08-26 Jernkontoret Forskningsavdelni Method of continuous casting of steels or metal alloys with segregation tendancy and apparatus for carrying out the method
DE3427708C2 (de) 1984-07-27 1986-09-04 Krupp Stahl Ag, 4630 Bochum Vorrichtung zum seitlichen Führen eines Stranges einer Knüppel-Stranggießanlage
JP2003094154A (ja) 2001-09-21 2003-04-02 Sanyo Special Steel Co Ltd 鋼の連続鋳造方法
KR101264635B1 (ko) 2010-11-19 2013-05-24 주식회사 포스코 주편 압하 장치 및 이를 이용한 연속주조 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837392A (en) * 1971-11-18 1974-09-24 I Rossi Apparatus for continuously casting steel slabs
WO1995020448A1 (fr) * 1994-01-28 1995-08-03 Mannesmann Ag Installation de coulee continue pour guider du metal coule en continu
DE4403047C1 (de) * 1994-01-28 1995-08-10 Mannesmann Ag Strangführungsgerüst
DE4403046C1 (de) * 1994-01-28 1995-08-17 Mannesmann Ag Rolle für ein Strangführungsgerüst
DE19520939C1 (de) 1995-06-02 1996-07-25 Mannesmann Ag Verstelleinrichtung für Führungsrollen in Stranggießanlagen
DE10119550A1 (de) 2001-04-21 2002-10-24 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen von Stranggu-Vormaterial

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHANG HO MOON, KYUNG SHIK OH, JOO DONG LEE, SUNG JIN LEE, YOUNGSEOG LEE: "Effect of the Roll Surface Profile on Centerline Segregation in Soft Reduction Process", ISIJ INTERNATIONAL, vol. 52, no. 7, 13 July 2012 (2012-07-13), pages 1266 - 1272, XP002771796, Retrieved from the Internet <URL:https://www.jstage.jst.go.jp/article/isijinternational/52/7/52_1266/_pdf> DOI: 10.2355/isijinternational.52.1266 *

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Publication number Publication date
EP3235579B2 (fr) 2023-08-30
EP3235579B1 (fr) 2020-05-13

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