US3911995A - Method and apparatus for using a rigid starter bar through a fixed bending unit - Google Patents

Method and apparatus for using a rigid starter bar through a fixed bending unit Download PDF

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Publication number
US3911995A
US3911995A US185644A US18564471A US3911995A US 3911995 A US3911995 A US 3911995A US 185644 A US185644 A US 185644A US 18564471 A US18564471 A US 18564471A US 3911995 A US3911995 A US 3911995A
Authority
US
United States
Prior art keywords
rolls
casting
starter bar
bending
switch section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US185644A
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English (en)
Inventor
Quin Shen Yu
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.)
United States Steel Corp
Original Assignee
United States Steel Corp
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
Priority to BE789204D priority Critical patent/BE789204A/xx
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to US185644A priority patent/US3911995A/en
Priority to CA151,742A priority patent/CA957126A/en
Priority to ZA726370A priority patent/ZA726370B/xx
Priority to GB4316872A priority patent/GB1410336A/en
Priority to AU46946/72A priority patent/AU461040B2/en
Priority to FR7233951A priority patent/FR2156612B1/fr
Priority to DE19722247083 priority patent/DE2247083A1/de
Priority to AR244284A priority patent/AR193758A1/es
Priority to ES407069A priority patent/ES407069A1/es
Priority to NL7213170A priority patent/NL7213170A/xx
Priority to BR006723/72A priority patent/BR7206723D0/pt
Priority to IT70089/72A priority patent/IT975135B/it
Priority to AT842172A priority patent/AT326851B/de
Priority to JP9887172A priority patent/JPS5528777B2/ja
Priority to RO72400A priority patent/RO60668A/ro
Application granted granted Critical
Publication of US3911995A publication Critical patent/US3911995A/en
Assigned to USX CORPORATION, A CORP. OF DE reassignment USX CORPORATION, A CORP. OF DE MERGER (SEE DOCUMENT FOR DETAILS). Assignors: UNITED STATES STEEL CORPORATION (MERGED INTO)
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/12—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
    • B22D11/08—Accessories for starting the casting procedure
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/142—Plants for continuous casting for curved casting

Definitions

  • ABSTRACT A continuous-casting machine using a rigid starter bar in which all the bending rolls are joumaled on fixed axes.
  • the pair of bending rolls which are below the tangent line have work-engaging faces offset horizontally from the work-engaging faces of the rolls above in the direction toward which the casting is bent, but the offset is insufficient to interfere with vertical movement of the starter bar between these rolls.
  • Several rolls of the curved roll rack below the bending rolls are journaled in a switch section which can open to let the starter bar pass vertically or close to guide a casting.
  • This invention relates to a continuous-casting machine which uses a rigid starter bar and has an improved arrangement of bending rolls, and to an improved method of handling a rigid starter bar.
  • liquid metal is poured through an open-ended watercooled vertically oscillating mold.
  • a casting which at this stage has only a relatively thin solidified skin and a liquid core, emerges continuously from the lower end of the mold.
  • a starter bar is inserted in the mold to close the lower end.
  • the starter bar which may be either rigid or flexible, is withdrawn from the mold ahead of the casting. At some point below the mold the starter bar is disconnected from the leading end of the casting and stored until needed to start the next cast.
  • the starter bar and casting travel through a straight vertical guideroll rack immediately below the mold and through an assembly of power-drive pinch rolls beneath the guideroll rack.
  • the starter bar is disconnected below the pinch-roll assembly and drops into a suitable receiver, such as a basket hoist.
  • the casting travels through a set of bending rolls, which impart a curvature to the casting.
  • the curved casting travels through a curved roll rack, which changes its direction of travel from vertical to horizontal, and ultimately through a straightener. All the while intense water sprays are applied to the casting surface to promote solidification. After the casting is solidified throughout, it is severed to appropriate lengths.
  • An object of my invention is to provide, in a continuous-casting machine using a rigid starter bar, an improved arrangement of bending rolls in which I overcome the foregoing disadvantages, that is, I avoid journaling any of the bending rolls in a switch section and I use only a single switch section.
  • a further object is to provide an improved arrangement of bending rolls which enables a rigid starter bar to pass vertically, yet avoids need for shifting any of the bending rolls, and necessitates opening and closing only a single switch section.
  • a further object is to provide an improved method of handling a rigid starter bar in which I move the bar through a set of bending rolls without shifting any of them, and open and close only a single switch section below and independently of the bending rolls.
  • a further object is to provide an improved mechanism for opening and closing a switch section in a continuous-casting machine, which mechanism embodies a toggle linkage affording positive support for the switch section when closed.
  • FIG. 1 is a partly diagrammatic side elevational view of a continuous-casting machine in which the bending rolls are arranged in accordance with my invention, the switch section being shown in its closed position;
  • FIG. 2 is a similar view with the switch section in its open position.
  • the machine illustrated includes from top to bottom an open-ended water-cooled vertically oscillating mold 10, a straight vertical guide-roll rack 12, an assembly of power-driven pinch rolls 13, a set of bending rolls 14, and a curved roll rack 15.
  • the rolls, other than the pinch rolls, can be idlers or various rolls can be driven, as known in the art.
  • the machine has a rigid starter bar 16, which is disconnected from a casting after the leading end of the casting passes the pinch rolls, also as known in the art.
  • a basket hoist 17 receives the disconnected starter bar.
  • FIG. 1 shows a casting C extending through the guide-roll rack 12, pinch roll assembly 13 and bending rolls 14 into the curved roll rack 15.
  • the set of bending rolls includes two clusters 14a and 14b, which contact the convex face of the casting C, and two clusters 14c and 14d, which contact the concave face.
  • the upper roll 20 of cluster 14d is the fulcrum roll, which defines the tangent line where the casting first acquires a curvature.
  • all the bending rolls are journaled on fixed axes.
  • the work-engaging faces of the lower rolls 21 and 22 of clusters 14b and 14d are offset horizontally from these planes about 3/16 to 7/32 inch in the direction toward which the casting C curves. This relatively small offset is sufficient to bend the casting on a radius of curvature of about 31 to 33 feet.
  • This curved roll rack 15 has only a single switch section 23.
  • This section includes a frame 25 pivoted at 26 to the supporting structure 27 of the machine.
  • a plurality of rolls 28 are journaled in frame 25 for contacting the convex face of the casting.
  • the switch section 23 is closed, as shown in FIG. 1, the work-engaging faces of rolls 28 lie along an arc which is a continuation of the arc defined by the rolls below.
  • the uppermost roll 28 lies just below the lower roll 21 of the bending roll cluster 14b.
  • I For opening and closing the switch sec tion, I connect a toggle linkage 29 between the supporting structure 27 and frame 25.
  • FIG. 2 shows the relation of the parts when the switch section 23 is open.
  • the pinch rolls 13 are spring loaded, known in the art, whereby they grip the starter bar well as the casting C, which is somewhat thicker than the starter bar.
  • the offset of roll 21 toward the starter bar is sufficiently small that the starter bar can move past vertically without interference.
  • the switch section 23 operates independently of the bending rolls 14.
  • my invention affords a simple bending roll arrangement for accommodating a rigid starter bar, yet keeping all bending rolls journaled on fixed axes.
  • the invention also affords a method of handling the starter bar without shifting any of the bending rolls.
  • a rigid starter bar is advantageous over a flexible bar, since a flexible bar necessitates a long run-out conveyor.
  • My invention facilitates use of a rigid bar in such installations, since it overcomes other problems encountered with a rigid bar.
  • a continuous-casting machine which includes a mold, a guide-roll rack below said mold, an assembly of power-driven pinch rolls below said guide-roll rack, a set of bending rolls below said pinch rolls, a curved roll rack below said bending rolls, and a rigid starter bar adapted to be disconnected from a casting after the leading end of the casting passes said pinch rolls, said bending rolls including a fulcrum roll which defines a tangent line where the casting first acquires a curvature and other rolls which contact the convex and concave faces of the casting both above and below said tangent line, the improvement comprising a switch section in which several rolls of the curved roll rack are journaled, said switch section being shiftable to an open position to allow said starter bar to pass vertically and to a closed position to guide the casting into the rolls below, said bending rolls below said tangent line having work-engaging faces offset horizontally from the workengaging faces of the rolls above in the direction toward which the casting curves, but being journaled on fixed axe
  • a machine as defined in claim 1 in which the distance of offset is about 3/16 to 7/32 inch, which bends the casting on a radius of about 31 to 33 feet, but is insufficient to interfere with vertical movement of said starter bar.
  • a machine as defined in claim 1 in which there is only a single switch section and the only rolls journaled therein are located on the convex side of the casting.
  • said switch section includes a frame in which the rolls are journaled, means pivotally supporting said frame, and a toggle linkage connected to said frame for shifting the section between its open and closed positions, said linkage affording positive support for said section in its closed position.
  • a method of handling a rigid starter bar in a continuous-casting machine which includes a set of bending rolls, said method comprising withdrawing the starter bar ahead of a casting in a vertical direction, moving the starter bar past the bending rolls without shifting the bending rolls, and bending the casting to a curvature after the starter bar is disconnected from the leading end thereof.
  • a method as defined in claim 5 in which a switch section below the bending rolls is opened to allow the starter bar to pass vertically and closed to guide the casting independently of the bending rolls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US185644A 1971-10-01 1971-10-01 Method and apparatus for using a rigid starter bar through a fixed bending unit Expired - Lifetime US3911995A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
BE789204D BE789204A (fr) 1971-10-01 Procede et appareil pour utiliser une barre d'amorcage rigide dans un dispositif de cintrage fixe
US185644A US3911995A (en) 1971-10-01 1971-10-01 Method and apparatus for using a rigid starter bar through a fixed bending unit
CA151,742A CA957126A (en) 1971-10-01 1972-09-14 Method and apparatus for using a rigid starter bar through a fixed bending unit
ZA726370A ZA726370B (en) 1971-10-01 1972-09-18 Method and apparatus for using a rigid starter bar through a fixed bending unit
GB4316872A GB1410336A (en) 1971-10-01 1972-09-18 Method and apparatus for handling a vertically descending starter bar in a continuous casting machine
AU46946/72A AU461040B2 (en) 1971-10-01 1972-09-21 Method and apparatus for using a rigid starter bar through afixed bending unit
AR244284A AR193758A1 (es) 1971-10-01 1972-09-26 Maquina de vaciado continuo con dispositivo doblador de la pieza vaciada y separador de la vara de cabado antes del doblado
DE19722247083 DE2247083A1 (de) 1971-10-01 1972-09-26 Verfahren und vorrichtung zur steuerung einer steifen anfahrstange in einer stranggiessmaschine
FR7233951A FR2156612B1 (pt) 1971-10-01 1972-09-26
ES407069A ES407069A1 (es) 1971-10-01 1972-09-27 Perfeccionamientos en maquinas de moldeo continuo.
BR006723/72A BR7206723D0 (pt) 1971-10-01 1972-09-28 Processo de manejar uma barra de partida e maquina de fundicao continua
NL7213170A NL7213170A (pt) 1971-10-01 1972-09-28
IT70089/72A IT975135B (it) 1971-10-01 1972-09-29 Procedimento e dispositivo per ini ziare la colata continua coll impie go del falso lingotto
AT842172A AT326851B (de) 1971-10-01 1972-09-29 Stranggiessmaschine
JP9887172A JPS5528777B2 (pt) 1971-10-01 1972-10-02
RO72400A RO60668A (pt) 1971-10-01 1972-10-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US185644A US3911995A (en) 1971-10-01 1971-10-01 Method and apparatus for using a rigid starter bar through a fixed bending unit

Publications (1)

Publication Number Publication Date
US3911995A true US3911995A (en) 1975-10-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
US185644A Expired - Lifetime US3911995A (en) 1971-10-01 1971-10-01 Method and apparatus for using a rigid starter bar through a fixed bending unit

Country Status (16)

Country Link
US (1) US3911995A (pt)
JP (1) JPS5528777B2 (pt)
AR (1) AR193758A1 (pt)
AT (1) AT326851B (pt)
AU (1) AU461040B2 (pt)
BE (1) BE789204A (pt)
BR (1) BR7206723D0 (pt)
CA (1) CA957126A (pt)
DE (1) DE2247083A1 (pt)
ES (1) ES407069A1 (pt)
FR (1) FR2156612B1 (pt)
GB (1) GB1410336A (pt)
IT (1) IT975135B (pt)
NL (1) NL7213170A (pt)
RO (1) RO60668A (pt)
ZA (1) ZA726370B (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150715A (en) * 1976-09-09 1979-04-24 Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft Supporting and guiding means for cast strands
US5598884A (en) * 1992-10-26 1997-02-04 Clecim Device for guiding a cast bar from the output of a casting wheel to the input of a rolling mill
WO2004007112A1 (en) * 2002-07-10 2004-01-22 Danieli & C. Officine Meccaniche S.P.A. Continuous casting plant with a deflecting device for metallic strips and deflecting method
US20040045695A1 (en) * 2000-10-06 2004-03-11 Karl Rittner Device for the continous casting of metals, especially steel, for use in a solidified bending method
CN109158566A (zh) * 2018-04-25 2019-01-08 西安麦特沃金液控技术有限公司 金属坯立式连续铸造设备及方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5233944A (en) * 1975-09-10 1977-03-15 Nippon Cable Syst Inc Control cables
AT347057B (de) * 1976-07-08 1978-12-11 Voest Ag Stranggiessanlage
FR2498499A1 (fr) * 1981-01-27 1982-07-30 Clesid Sa Dispositif de guidage, d'extraction et d'introduction de mannequin pour machine de coulee continue

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338297A (en) * 1964-03-06 1967-08-29 United States Steel Corp Apparatus for bending a casting having a liquid core

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338297A (en) * 1964-03-06 1967-08-29 United States Steel Corp Apparatus for bending a casting having a liquid core

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150715A (en) * 1976-09-09 1979-04-24 Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft Supporting and guiding means for cast strands
US5598884A (en) * 1992-10-26 1997-02-04 Clecim Device for guiding a cast bar from the output of a casting wheel to the input of a rolling mill
US20040045695A1 (en) * 2000-10-06 2004-03-11 Karl Rittner Device for the continous casting of metals, especially steel, for use in a solidified bending method
US6810942B2 (en) 2000-10-06 2004-11-02 Sms Demag Ag Device for the continuous casting of metals, especially steel, for use in a solidified bending method
KR100817175B1 (ko) 2000-10-06 2008-03-27 에스엠에스 데마그 악티엔게젤샤프트 응고화 굽힘 처리용 금속 연속 주조 장치, 특히 강 연속주조 장치
WO2004007112A1 (en) * 2002-07-10 2004-01-22 Danieli & C. Officine Meccaniche S.P.A. Continuous casting plant with a deflecting device for metallic strips and deflecting method
US20050236134A1 (en) * 2002-07-10 2005-10-27 Alfredo Poloni Continuous casting plant with a deflecting device for metallic strips and deflecting method
CN109158566A (zh) * 2018-04-25 2019-01-08 西安麦特沃金液控技术有限公司 金属坯立式连续铸造设备及方法

Also Published As

Publication number Publication date
JPS4842924A (pt) 1973-06-21
ATA842172A (de) 1975-03-15
GB1410336A (en) 1975-10-15
RO60668A (pt) 1976-12-15
JPS5528777B2 (pt) 1980-07-30
NL7213170A (pt) 1973-04-03
ES407069A1 (es) 1975-11-01
BE789204A (fr) 1973-03-22
BR7206723D0 (pt) 1973-07-24
DE2247083A1 (de) 1973-04-05
AU4694672A (en) 1974-03-28
FR2156612A1 (pt) 1973-06-01
CA957126A (en) 1974-11-05
FR2156612B1 (pt) 1978-03-03
ZA726370B (en) 1973-06-27
AU461040B2 (en) 1975-05-15
AT326851B (de) 1976-01-12
IT975135B (it) 1974-07-20
AR193758A1 (es) 1973-05-22

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Legal Events

Date Code Title Description
AS Assignment

Owner name: USX CORPORATION, A CORP. OF DE, STATELESS

Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960

Effective date: 19880112