EP0188670A2 - Procédé et dispositif pour ajuster les petits côtés d'une lingotière de coulée continue pour la coulée continue de métaux notamment d'acier - Google Patents

Procédé et dispositif pour ajuster les petits côtés d'une lingotière de coulée continue pour la coulée continue de métaux notamment d'acier Download PDF

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Publication number
EP0188670A2
EP0188670A2 EP85113393A EP85113393A EP0188670A2 EP 0188670 A2 EP0188670 A2 EP 0188670A2 EP 85113393 A EP85113393 A EP 85113393A EP 85113393 A EP85113393 A EP 85113393A EP 0188670 A2 EP0188670 A2 EP 0188670A2
Authority
EP
European Patent Office
Prior art keywords
narrow side
casting
speed
width
strand
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Withdrawn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
EP85113393A
Other languages
German (de)
English (en)
Other versions
EP0188670A3 (fr
Inventor
Peter Dr.-Ing. Monheim
Gerhard Dipl.-Ing. Stadtfeld
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0188670A2 publication Critical patent/EP0188670A2/fr
Publication of EP0188670A3 publication Critical patent/EP0188670A3/fr
Withdrawn legal-status Critical Current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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls

Definitions

  • the invention relates to several methods and a device for adjusting one or both narrow side plates of a continuous casting mold in the continuous casting of metals, in particular steel, which are adjusted to the respective taper of the casting strand shrinking due to cooling and adjusted for the purpose of changing the strand width.
  • the previous adjustment practice means a considerable load on the cast strand which has only partially cooled with an external crust in the continuous casting mold. This increases the risk of breakthroughs, particularly when it comes to widening.
  • the adjustment speed plays a special role here. A further increase in the adjustment speed does not appear to be practical due to the known process technology.
  • the need to reduce production costs makes it necessary to keep the intermediate storage size in front of the hot strip mill as small as possible and, if possible, to use the heat stored in the cast slab directly for the rolling process, i.e. to realize the hot operation.
  • the narrow side plate (or both narrow side plates) is adjusted in three steps for the purpose of increasing the strand width:
  • the first step the mold narrow side is tilted by a point in the lower area of the mold at the beginning of the adjustment.
  • the adjustment speed of the mold narrow side is adapted to the narrow side inclination and to the casting speed. The extent to which this adjustment takes place is not explained in more detail, however.
  • the narrow side plate must be tilted back again to end the adjustment. The tilting movement takes place in such a way that a slight compression of the narrow side of the slab occurs in the upper area, while a small gap between the mold wall and the slab surface is permitted in the lower area.
  • the length of the continuous casting mold is of considerable importance for a sustainable improvement of the current state of the art.
  • Standard lengths when casting slab cast strands for the continuous casting mold are 704 mm or 904 mm, it should be noted that with such lengths one, two or more castors are usually attached to the narrow side plates (also to the broad side plates), which are the so-called “active" Mold length "result. Then so-called short molds from e.g. 500 mm length with one, two or more castors in use.
  • the narrow side plate, together with the casters forms the "active mold length".
  • the device for adjusting one or both narrow side plates each consists of a pair of axially movable nuts articulated on a narrow side plate, in each of which rotatably driven spindles are mounted, the spindles being drivable at different speeds. Both spindles can now be driven by a motor via a transfer case. With such a design, a parallel adjustment, i.e. an adjustment of the taper during the adjustment. However, conicity adjustment is not possible here. A taper change can, however, be achieved by different pitches of the upper and lower spindle or by a corresponding translation in the gearbox as a linear width-dependent taper change.
  • a modification of the known type is made by choosing a coupling between the two spindles in the form of an electromagnetic coupling, whereby in addition to moving the narrow side plates, a taper adjustment is also possible by releasing this coupling.
  • the invention is based on the object of keeping the wedge length between two different cast strand widths as short as possible by better adjustment in the three specified steps (forward tilting, parallel adjustment, tilting back), which is disadvantageous
  • the process-technical object of the invention is not only to significantly reduce the disadvantageous gap between the inside of the narrow side plate and the molten metal and the wedge length when the cast strand width is reduced, but also to reduce the degree of deformation.
  • the technical task of the device is to create the device suitable for the process-related adjustment movements, taking into account the "active mold length”.
  • the stated object is procedurally dissolved accordance with the invention (to enlarge the Gußstrangumble), that with at least constant Radiog bill york or opposite the Radiog bill Supreme elevated G mangeschwin - velocity "active mold length" is pivoted about an ideal axis of rotation, wherein during tilting around a below the respective Ideal rotational axis lying on the narrow side plate and is pivoted about an ideal rotational axis lying in the area of the mold level during the setting of the end taper.
  • This procedure has several advantages: Based on practical tests, it was found that the gap widths surprisingly decrease with increasing casting speed and do not increase, as was previously assumed.
  • the gap between the inside of the narrow side plates and the molten metal can be kept as large as possible over the entire adjustment movement, in that, according to further features of the invention, during an intermediate period of tilting, it is pivoted about the ideal axis of rotation below the respective narrow side plates with an increased tilting speed.
  • the adjustment movement becomes even more favorable if, at the beginning of the width increase, the narrow side plates are tilted outwards with a horizontal parallel adjustment movement being superimposed, and if the narrow side plates are each tilted back into the resulting new taper during the horizontal parallel adjustment movement before the end of the width increase.
  • These superimposed movements lead to particularly short wedge lengths without disadvantageously stressing the cast strand or causing an impermissible deformation or impairing the smear layer.
  • the amount of tilting outwards is determined on the basis of the casting speed, on the basis of the parallel adjustment speed and as a function of the "active mold length" present in each case.
  • the procedural task (for reducing the width of the cast strand) is achieved according to the invention in that when the strand width is reduced at least the operating casting speed remains constant or the casting speed is increased compared to the operating casting speed, the respective narrow side plate with its "active mold length" tilts back, parallel adjustment and after the smaller strand width has been reached, the resulting taper is set, the tilting back about an ideal axis of rotation lying below the narrow side plate and the setting of the resulting conicity about an ideal axis of rotation lying in the area of the casting mirror.
  • the device for carrying out the method requires a continuous casting mold with axially movable nuts articulated on a narrow side plate, in which in each case rotatably driven spindles are mounted, the spindles being drivable at different speeds, each spindle being connected to a separate motor via a separate gear train, and wherein the motors can be individually electrically controlled.
  • the narrow side plates can be pivoted or adjusted either around the lowest point of the "active mold length" as the lower ideal rotation axis or around the pouring mirror point as the upper ideal rotation axis, the adjustment speed in each case at the lowest point "active mold length” or in the pouring point is zero and the articulation points of the two articulated nuts refer to the uniform level of the castor tangent points and the inside of the narrow side plate in lever lengths corresponding to the speed vectors available at the respective articulation point when enlarging or reducing the cast strand width based on a maximum Adjustment speed is divided.
  • the articulation points of the two articulated nuts are therefore not, as is known, characterized by the same spacing in the invention, whereby it remains open in which way the two drive motors are electronically controlled. Rather, it is necessary that at a once set maximum adjustment speed. speed the lever lengths according to their point of application, based on the respective zero point of the rotary movement in a fixed Translation ratio are brought.
  • the invention advantageously fulfills this condition.
  • the inclined position of the narrow side plate 3 corresponds to the shrinkage of the cast strand 5, the outer crust 5a of which has solidified, up to the continuous casting mold outlet 4.
  • castors 6, 7 and 8 are fastened, which oscillate with the continuous casting mold 2.
  • the narrow side plate inner side 3a and the tangent points 6a, 7a and 8a of the casters 6, 7 and 8 form a uniform plane 9.
  • the lowest point 10 of the "active mold length" 18 is the castor tangent point 8a Casters or just one Castor this point 10 shifts accordingly.
  • Point 10 is regarded as the ideal axis of rotation 11 perpendicular to the plane of the drawing sheet.
  • the axis of rotation 11 acts when the cast strand width is increased via the pivoting movement a (FIG. 2) as a presetting for the parallel adjustment b.
  • the axis of rotation 11 acts via the pivoting movement a as a presetting for the parallel adjustment b.
  • the pouring mirror point 12 forms an ideal axis of rotation 13 perpendicular to the plane of the drawing sheet.
  • the axis of rotation 13 acts when the cast strand width is increased (FIG. 2) via the pivoting movement c to adjust the end taper 3b. Accordingly, the axis of rotation 13 acts when the cast strand width is reduced (FIG. 3) via the pivoting movement c to adjust the end taper 3b.
  • the articulation points 14 and 15 for the articulated nuts 16 and 17 are projected in the plane 9. From the "active mold length" 18, the axes of rotation 11 and 13 and the lever lengths 19a or 19b and 20a or 20b and one With regard to a high casting speed (which depends on the metallurgical cooling conditions), high (maximum) adjustment speed can be determined in the articulation points 14 and 15, the local adjustment speed vCH1 and vCH2, which by appropriate control of the individual electronically controllable motors for the articulated nuts 16 and 17 (or the spindles driven by the motors - not shown -) are generated.
  • FIGS. 2 and 3 now take place at a constant casting speed or even at an increased casting speed.
  • the adjustment speed for the pivoting movements a and c can be increased additionally.
  • Another variant of the adjustment movements is to move the pivoting movement a and the parallel adjustment b or the latter and the pivoting movement c overlapping one another.
  • the total adjustment path (delta width) is e.g. set to 25 mm or to another value.
  • the table "open mold” shows that at a maximum adjustment speed of 30 mm / min there is only a gap of 2.1 mm and a maximum deformation of 3.7 mm, so that the wedge length is only 2.3 m. However, this wedge length can even be reduced to 1.6 m with a slightly increased gap width of a maximum of 4.4 mm and with a slightly larger deformation of a maximum of 4.1 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP85113393A 1985-01-19 1985-10-22 Procédé et dispositif pour ajuster les petits côtés d'une lingotière de coulée continue pour la coulée continue de métaux notamment d'acier Withdrawn EP0188670A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853501716 DE3501716A1 (de) 1985-01-19 1985-01-19 Verfahren und einrichtung zum verstellen der schmalseitenplatten einer stranggiesskokille beim stranggiessen von metallen, insbesondere von stahl
DE3501716 1985-01-19

Publications (2)

Publication Number Publication Date
EP0188670A2 true EP0188670A2 (fr) 1986-07-30
EP0188670A3 EP0188670A3 (fr) 1987-05-20

Family

ID=6260249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113393A Withdrawn EP0188670A3 (fr) 1985-01-19 1985-10-22 Procédé et dispositif pour ajuster les petits côtés d'une lingotière de coulée continue pour la coulée continue de métaux notamment d'acier

Country Status (6)

Country Link
US (1) US4702303A (fr)
EP (1) EP0188670A3 (fr)
JP (1) JPS61169140A (fr)
CN (1) CN85108654A (fr)
CA (1) CA1262611A (fr)
DE (1) DE3501716A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102294455A (zh) * 2010-06-28 2011-12-28 宝山钢铁股份有限公司 一种板坯连铸机结晶器的不停止浇注高速短边调宽方法

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT405147B (de) * 1992-07-08 1999-05-25 Voest Alpine Ind Anlagen Verfahren zum vergrössern der breite eines gussstranges während des kontinuierlichen stranggiessens
EP1262260B1 (fr) * 2001-05-31 2005-07-27 Daido Tokushuko Kabushiki Kaisha Procédé et dispositif pour la coulée verticale d'un lingot, ainsi que lingot obtenu
US6857464B2 (en) 2002-09-19 2005-02-22 Hatch Associates Ltd. Adjustable casting mold
CN102240783B (zh) * 2011-08-15 2013-08-14 中冶南方工程技术有限公司 用于大范围连铸结晶器在线调整宽度减小的方法
CN102240782B (zh) * 2011-08-15 2013-08-14 中冶南方工程技术有限公司 用于小范围连铸结晶器在线调整宽度减小的方法
CN102240788B (zh) * 2011-08-15 2013-09-18 中冶南方工程技术有限公司 用于小范围连铸结晶器在线调整宽度增加的方法
CN102240787B (zh) * 2011-08-15 2013-08-14 中冶南方工程技术有限公司 用于大范围连铸结晶器在线调整宽度增加的方法
CN102601335B (zh) * 2012-03-23 2014-01-01 中冶南方工程技术有限公司 在线连续快速调整结晶器宽度减少的方法
CN102601326B (zh) * 2012-03-23 2014-03-12 中冶南方工程技术有限公司 在线连续快速调整结晶器宽度增加的方法
CN102921912B (zh) * 2012-10-30 2014-10-08 鞍钢股份有限公司 一种控制结晶器跑锥的方法
GB2522873A (en) * 2014-02-07 2015-08-12 Siemens Vai Metals Tech Gmbh A method of forming tailored cast blanks
CN104148606B (zh) * 2014-08-14 2016-04-20 中冶南方工程技术有限公司 一种板坯连铸结晶器油缸故障时在线调宽方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2415224A1 (de) * 1973-03-30 1974-10-10 Concast Ag Verfahren und vorrichtung zum steuern der kuehlleistung von schmalseitenwaenden bei plattenkokillen beim stranggiessen
DE2743025B2 (de) * 1976-09-27 1979-11-08 Kawasaki Steel Corp., Kobe, Hyogo (Japan) Verfahren zum Erweitern der Strangbreite eines Stahlstranges beim Strang-
DE2923113A1 (de) * 1978-06-14 1979-12-20 Voest Alpine Ag Verfahren zum aendern eines strangquerschnittformates und kokille zur durchfuehrung des verfahrens
EP0028766A1 (fr) * 1979-11-02 1981-05-20 Concast Holding Ag Procédé et installation pour changer les dimensions d'une barre lors de la coulée continue

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT343838B (de) * 1976-08-05 1978-06-26 Voest Ag Kokille in einer stranggiessanlage
JPS5717348A (en) * 1980-07-03 1982-01-29 Nippon Steel Corp Method for reducing width of mold in continuous casting
DE3118986C1 (de) * 1981-05-08 1983-03-10 Mannesmann AG, 4000 Düsseldorf Verfahren zum Verstellen der Seitenwaende einer Kokille

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2415224A1 (de) * 1973-03-30 1974-10-10 Concast Ag Verfahren und vorrichtung zum steuern der kuehlleistung von schmalseitenwaenden bei plattenkokillen beim stranggiessen
DE2743025B2 (de) * 1976-09-27 1979-11-08 Kawasaki Steel Corp., Kobe, Hyogo (Japan) Verfahren zum Erweitern der Strangbreite eines Stahlstranges beim Strang-
DE2923113A1 (de) * 1978-06-14 1979-12-20 Voest Alpine Ag Verfahren zum aendern eines strangquerschnittformates und kokille zur durchfuehrung des verfahrens
EP0028766A1 (fr) * 1979-11-02 1981-05-20 Concast Holding Ag Procédé et installation pour changer les dimensions d'une barre lors de la coulée continue

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102294455A (zh) * 2010-06-28 2011-12-28 宝山钢铁股份有限公司 一种板坯连铸机结晶器的不停止浇注高速短边调宽方法
CN102294455B (zh) * 2010-06-28 2013-07-17 宝山钢铁股份有限公司 一种板坯连铸机结晶器的不停止浇注高速短边调宽方法

Also Published As

Publication number Publication date
DE3501716C2 (fr) 1987-05-14
JPS61169140A (ja) 1986-07-30
DE3501716A1 (de) 1986-07-24
CA1262611A (fr) 1989-11-07
US4702303A (en) 1987-10-27
EP0188670A3 (fr) 1987-05-20
CN85108654A (zh) 1986-09-24

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Inventor name: MONHEIM, PETER, DR.-ING.

Inventor name: STADTFELD, GERHARD, DIPL.-ING.