US3542118A - Dummy bar handling mechanism - Google Patents

Dummy bar handling mechanism Download PDF

Info

Publication number
US3542118A
US3542118A US692219A US3542118DA US3542118A US 3542118 A US3542118 A US 3542118A US 692219 A US692219 A US 692219A US 3542118D A US3542118D A US 3542118DA US 3542118 A US3542118 A US 3542118A
Authority
US
United States
Prior art keywords
dummy bar
path
rolls
mold
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.)
Expired - Lifetime
Application number
US692219A
Other languages
English (en)
Inventor
Irving Rossi
Horst Huber
Herbert Fastert
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 Concast Inc
Original Assignee
Concast Inc
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 Concast Inc filed Critical Concast Inc
Application granted granted Critical
Publication of US3542118A publication Critical patent/US3542118A/en
Assigned to SMS CONCAST INC. reassignment SMS CONCAST INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 08/08/1984 Assignors: CONCAST INCORPORATED
Assigned to SMS CONCAST INC. reassignment SMS CONCAST INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CONCAST INCORPORATED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B22D11/08—Accessories for starting the casting procedure

Definitions

  • the present invention relates to machines for the continuous casting of metal and particularly to mechanism for handling dummy bars which are used in such machines.
  • molten metal is poured in one end of an open-ended mold which is cooled to solidify the periphery of the metal therein to form a strand.
  • the strand is then withdrawn from the exit end of the mold and conducted along an appropriate path to a work station at which it is cut'into lengths and/or otherwise processed.
  • suitable means such as water sprays, to prevent the core from remelting the periphery and then to complete solidification.
  • the strand moves down in a straight vertical line from the mold to'the first work station; in others it is conducted down along'a curved path in order'to bend it into a horizontal path where further work may be performed on it more conveniently and economically than in a vertical path.
  • the path of the strand away from the mold is usually defined by idler rolls or other suitable support elements and the strand is customarily withdrawn from the mold by driven withdrawal rolls frictionally engaging the strand at points along the path at which the strand is sufficientlysolidified so as resist being broken or rolled out of shape by the pressure of the withdrawal rolls.
  • the exit end of the mold is plugged by a dummy bar until sufficient metal accumulates in the mold for a strand to form.'Then the dummy bar is withdrawn and moved down the path from the mold followed by thestrand.
  • the dummy bar is withdrawn from the mold with at least the assistance of the withdrawal rolls. Consequently, the dummy bar is made long enough to extend from the mold to the withdrawal rolls (or at least to the first set of them if there are more than one set) and with the withdrawal rolls positioned along a portion of the path where the strand will" be substantially solidified the dummybar must be quite long in order to reach the rolls.
  • the dummy bars as usually constituted are'cumbersome to handle and store, par
  • An object of the-present invention is to provide mechanism for handling dummy bars that enables the use of relatively short dummy bars, as compared with dummy bars as presently constituted.
  • Another object isto provide means for removing a dummy bar from the path from the mold without having to travel to the end of the path, for storing it in a convenient location ready for reuse, and for reinserting it in the path in position to be moved back up the path to be plugged in the mold for a subsequent casting run.
  • the successive driven rolls along the-path to the conduit member are spaced so that the distances between them and between the upstream end of the conduit member and the first driven roll upstream from it, are each less than the length of the dummy bar.
  • the driven rolls of these pairs are adapted to be driven alternatively in reverse directions by conventional drive connections and are thus operable to move a dummy bar in either direction along the path, for withdrawing a dummy bar from the mold and conveying it to the conduit member in one direction, and moving it in the reverse direction, from the conduit member back up the path to mold-plugging position.
  • the driven rolls for moving the dummy bar in accordance with this invention operate with less pressure than the usual withdrawal rolls for the strand and therefore will not distort the shape of the strand, which follows the dummy bar.
  • Driven withdrawal rolls in the form applied in known machines are provided in the path'downstream from the conduit member to firmly engage the strand and assure its movement through the machine at a uniform rate. 7
  • FIG. 1 is a side, view of a vertical section through the essential portions of a continuous-casting machine having a dummy bar handling mechanism of the present invention, showing the elements diagrammatically;
  • FIG. 2 is a partial view of the machine shown in FIG. 1, showing the conduit member of the mechanism in its alternative position;
  • FIG. 3 is a view similarto the view of FIG. 1, but showing another embodiment of dummy bar handling mechanism of this invention.
  • FIG 4 is a partial vi'ew of the embodiment illustrated in FIG. 3, showing the conduit member of FIG. 3. in its alternative position.
  • the path defined by idler rolls l2 and withdrawal rolls 13 is shown as These and other objects are accomplished by the dummy 7 bar handling mechanism of'the present invention in which a conduit member having two conduits for the dummy bar and strand is arranged in the path for the strand from the mold to be movable to alternative positions in which one or theother of the conduits forms a section of the path.
  • the dummy bar is on the conduit which is in position forming a section of the path, the dummy bar is removed from the path by moving the conduit member to its alternative-position.
  • the conduitbearing' the dummy bar moves out of the path and is replaced by the other conduit so that the pathway for the strand, which follows the dummy bar, is clear and uninterrupted.
  • the conduit, on whichthe dummy bar then rests provides a storage position from which the dummy bar can readily be replaced on the path, after the tail end of the strand has passed the conduit member, by moving the conduit member to switch the positions of the conduits again.
  • a dummy bar 14 which has approximately the same cross-sectional dimensions as the strand 11, has its upstream end received in and plugging the exit end of the mold 10 until sufficient molten metal, indicated at 15, is accumulated in the mold for the strand 11 to be formed therein-Then the dummy bar is withdrawn and moves down the path defined by the rolls l2, and is followed by the strand 1 1.
  • a conduit member 16 is arranged in the path for the strand-and is preferably located upstream from the withdrawal rolls l3and a sequence of driven rolls D, each paired with and spaced from a back-up roll D, are interspersed between the idler rolls 12 at spaced intervals along the portion of the path between the mold and the conduit member 16.
  • the rolls D and D of each pair are spaced apart to permit passage of the dummy bar 14 or the strand ll between them and to frictionally engage the dummy bar 14 or strand 11 thus passing between.
  • the distances between the mold and the first roll D in the sequence, between the rolls D, and between the conduit member 16 and the roll D upstream from it are less than the length of the dummy bar 14.
  • the pairs of rolls D and D are thus adapted to apply power to move the dummy bar all the way along the path between the mold and conduit member, and the driven rolls D are drivingly connected in a conventional manner to a drive motor (not shown) to be selectively driven in one direction or the other for moving the dummy bar either down the path from the mold to the conduit member or in the reverse direction, from the conduit member to the mold.
  • the conduit member 16 has a pair of alternate conduits 20 and 21 thereon and each conduit is adapted to form a section of the path for the dummy bar 14, or strand 11, between the rollers D and D upstream from the conduit member 16 and the withdrawal rolls 13.
  • Suitable-means such as a hydraulically operated piston in a cylinder 22 having a reciprocating piston rod 23 pivotally connected at 24 to the frame 25 of the conduit member, is provided to move the conduit member 16 from the position shown in FIG. 1, in which the conduit 20 is in position forming a section for a through path, to the alternate position shown in FIG. 2, in which the conduit 21 is in the position to complete the path.
  • the conduit 20 is formed by a solid platform element 27 and the conduit 21 is formed .by pairs of spaced idler rolls 28 with intermediate platform segments 29.
  • the exact form of the conduits is not critical, however, and, in FIGS. 3 and 4, both conduits 20 and 21 are shown formed by platform elements 27.
  • One of the conduits, conduit 20 in the embodiments illustrated, has a stop lever 30 at its downstream end connected to the frame 25 by a pivot 31 and is mounted in a conventional manner so as to be resiliently urged downward to block the downstream end of the conduit.
  • the stop lever 30 is thus operable to block the conduit so that the dummy bar 14 moving down the path is brought to rest on the conduit 20. If it is desired to let the dummy bar proceed along the path, the stop lever 30 may be lifted up out of the way. Otherwise the stop lever holds the dummy bar 14 on the conduit 20 as shown in FIG. 1 so as to be lifted out of the path by moving the conduit member 16 to the position illustrated in FIG.
  • conduit member 16 may be moved back to the former position (FIG. 1) to replace the dummy bar in the path ready to be moved back up the path to be plugged into the mold for a subsequent casting run. This latter is accomplished by reversing the drive for the rolls D and then pushing the dummy bar back off the conduit 20 into the bite of the first pair of rolls D, D' upstream from the conduit member.
  • Means such as a hydraulically operated piston (not shown) connected to the stop lever, is suitably provided for swinging the stop lever to the left for pushing the dummy bar 14 back.
  • the sequence of rolls D, D' then conduct the dummy bar back up to the mold.
  • FIGS. 3 and 4 illustrate another form of casting machine embodying the invention.
  • one pair of idler rolls 12 is located very close to the exit end of the mold to guide the strand or dummy bar.
  • the path is further defined by one pair of withdrawal control rolls D" of which at least one is driven.
  • This pair of rolls of D" is nearer the exit end of the mold than the first pair of withdrawal control rolls in known machines.
  • This permits the use of a very short dummy bar, since the dummy bar now has only to have the length of the distance between the pair ofwithdrawal control rolls D" and the mold.
  • the shortness of this dummy bar results in a low weight and easy-to-handle dummy bar, and therefore only a comparatively low pressure has to be applied by the withdrawal control rolls D" on the dummy bar and subsequently on the following strand.
  • the conduit member 16 is positioned below the rolls D" a distance less than the length of the dummy bar in order forthe rolls D" to operate to move a dummy bar from the conduit 20 of the conduit member, back up to the mold by movement of stop lever 30, which is operated to push a dummy bar off the conduit 20 as described with reference to the embodiment shown in FIGS. 1 and 2, and by reversing the drive of the rolls D".
  • conduit member 16 From the conduit member 16 a strand moving down from the mold is suitably conducted along acurved path to the withdrawal or forwarding rolls 13 by a chute 35.
  • a strand of metal is formed in an open-ended mold and emerges from an exit end thereof, and wherein a dummy bar is applied to plug said exit end at the start of casting and is thereafter withdrawn
  • the improvement comprising a path for conducting the dummy bar and strand away from the exit end of the mold, a member in said path having a pair of conduits therethrough for the dummy bar and the strand, each of said conduits being a sufficient length to support the dummy bar, and means for selectively moving the member to alternative positions in which one or the otherof the conduits constitutes a section of said path, whereby a dummy bar on one of the conduits is placed in the path and removed therefrom by moving the member from one of said positions to the other.
  • the path includes a pair of rolls between the exit end of the mold and said member, said rolls being spaced apart and arranged for engaging respectively opposite sides of a strand or dummy bar on the path and at least one of the rolls being a driven roll, and in which the distances between the exit end of the mold and said rolls and between said rolls and said member are each less than the length of the dummyv bar whereby the rolls are adapted for drivingly moving a dummy bar from the mold to the member.
  • the machine of claim 1 which includes a sequence of pairs of rolls along the path between the exit end of the mold and said member, the rolls in each pair including a driven roll and being spaced apart and arranged for engaging respectively opposite sides of a strand or dummy bar on the path, and in which the distances between adjacent pairs of the rolls, between the exit end of the mold and the first pair of rolls in the sequence and between said member and the last pairin the sequence are each lessithan the length of the dummy bar whereby the rolls are'adapted for drivingly moving a dummy bar from the mold to the member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US692219A 1967-12-20 1967-12-20 Dummy bar handling mechanism Expired - Lifetime US3542118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69221967A 1967-12-20 1967-12-20

Publications (1)

Publication Number Publication Date
US3542118A true US3542118A (en) 1970-11-24

Family

ID=24779704

Family Applications (1)

Application Number Title Priority Date Filing Date
US692219A Expired - Lifetime US3542118A (en) 1967-12-20 1967-12-20 Dummy bar handling mechanism

Country Status (7)

Country Link
US (1) US3542118A (de)
AT (1) AT290038B (de)
CH (1) CH473628A (de)
DE (1) DE1815049B1 (de)
FR (1) FR1602819A (de)
GB (1) GB1194290A (de)
SE (1) SE352003B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707180A (en) * 1970-01-29 1972-12-26 Mannesmann Ag Method for advancing a continuously cast ingot along a curved withdrawal path
US3752210A (en) * 1971-08-24 1973-08-14 Steel Corp Method for controlling forces on a strand as it solidifies
US3752219A (en) * 1969-05-13 1973-08-14 Concast Ag Strand guide apparatus for continuous casting
US3779303A (en) * 1971-01-08 1973-12-18 Fives Lille Cail Installation for continuous ingot casting
US3823763A (en) * 1972-10-19 1974-07-16 United States Steel Corp Ramp-type apparatus for disconnecting and storing a flexible starter bar
US4412579A (en) * 1982-05-07 1983-11-01 Koppers Company, Inc. Apparatus for handling a continuous casting machine starter bar
US4623016A (en) * 1981-05-20 1986-11-18 Danieli & C. Officine Meccaniche S.P.A. Device for parking the dummy bar upstream from the extraction and straightening group
CN113894260A (zh) * 2021-09-30 2022-01-07 上海二十冶建设有限公司 一种大断面矩形坯连铸机快速脱引锭结构及操作方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH597943A5 (de) * 1976-10-07 1978-04-14 Concast Ag
DE2714338C3 (de) * 1977-03-31 1984-08-02 Mannesmann AG, 4000 Düsseldorf Anfahrstrang-Transportvorrichtung
DE2748690C2 (de) * 1977-10-29 1983-12-29 SMS Schloemann-Siemag AG, 4000 Düsseldorf Vorrichtung zum Lösen des Anfahrkopfes eines Anfahrstranges in einer Stranggießanlage
AT363627B (de) * 1979-10-22 1981-08-25 Voest Alpine Ag Strangfuehrung fuer eine bogenstranggiessanlage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1084450B (de) * 1957-06-11 1960-06-30 Mannesmann Ag Verfahren und Vorrichtung zum Anfahren beim Stranggiessen von Metallen
US2920359A (en) * 1957-12-26 1960-01-12 Koppers Co Inc Flexible segmental starting bar continuous casting machine
FR1264943A (fr) * 1960-08-11 1961-06-23 Concast Ag Dispositif pour l'amenée du jet d'obturation dans les installations de coulée continue
DE1210140B (de) * 1964-01-28 1966-02-03 Schloemann Ag Aufnahme- und Zufuehreinrichtung fuer den Anfahrstrang von Stranggiessanlagen
FR1384436A (fr) * 1964-03-02 1965-01-04 United States Steel Corp Tête de barre d'amorçage pour coulée continue et joint séparable pour cette tête
US3338297A (en) * 1964-03-06 1967-08-29 United States Steel Corp Apparatus for bending a casting having a liquid core

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752219A (en) * 1969-05-13 1973-08-14 Concast Ag Strand guide apparatus for continuous casting
US3707180A (en) * 1970-01-29 1972-12-26 Mannesmann Ag Method for advancing a continuously cast ingot along a curved withdrawal path
US3779303A (en) * 1971-01-08 1973-12-18 Fives Lille Cail Installation for continuous ingot casting
US3752210A (en) * 1971-08-24 1973-08-14 Steel Corp Method for controlling forces on a strand as it solidifies
US3823763A (en) * 1972-10-19 1974-07-16 United States Steel Corp Ramp-type apparatus for disconnecting and storing a flexible starter bar
US4623016A (en) * 1981-05-20 1986-11-18 Danieli & C. Officine Meccaniche S.P.A. Device for parking the dummy bar upstream from the extraction and straightening group
US4412579A (en) * 1982-05-07 1983-11-01 Koppers Company, Inc. Apparatus for handling a continuous casting machine starter bar
CN113894260A (zh) * 2021-09-30 2022-01-07 上海二十冶建设有限公司 一种大断面矩形坯连铸机快速脱引锭结构及操作方法
CN113894260B (zh) * 2021-09-30 2023-04-11 上海二十冶建设有限公司 一种大断面矩形坯连铸机快速脱引锭结构及操作方法

Also Published As

Publication number Publication date
GB1194290A (en) 1970-06-10
FR1602819A (de) 1971-02-01
DE1815049B1 (de) 1970-12-17
CH473628A (de) 1969-06-15
AT290038B (de) 1971-05-10
SE352003B (de) 1972-12-18

Similar Documents

Publication Publication Date Title
US3542118A (en) Dummy bar handling mechanism
GB1047669A (en) Improvements in or relating to apparatus and method for continuous casting
GB1098922A (en) Method and apparatus for bending a casting having a liquid core
US3426835A (en) Starting mechanism for continuous casting machine
US3446270A (en) Apparatus for continuous casting
US3528485A (en) Continuous-casting mold
US3305899A (en) Dummy bar for continuously casting metals
US3157920A (en) Continuous casting plant with deflection of the casting
US3631959A (en) Apparatus for transporting castings from continuous casting machines
US3464482A (en) Continuous casting
US3542115A (en) Continuous-casting method
US3482620A (en) Apparatus for continuous metal casting
US3278999A (en) Apparatus for continuous casting of metals
US3608620A (en) Apparatus for guiding a straightened strand in a continuous casting machine
US3593792A (en) Dummy bar for continuous casting
US2975493A (en) Casting of metals
US3692094A (en) Apparatus for receiving and storing a flexible starter bar
US3429366A (en) Universal starting bar
US3367399A (en) Continuous casting apparatus
US3603375A (en) Flexible starter bar for continuous castings
GB1260171A (en) Roller cage for confining continuous casting as it emerges from mould
US5103892A (en) Continuous casting of discrete shapes
US3901491A (en) Apparatus for cutting billets from a continuous cast strand
US3661199A (en) Dummy bar storage apparatus
US3638715A (en) Method for the continuous casting of tubes

Legal Events

Date Code Title Description
AS Assignment

Owner name: SMS CONCAST INC.

Free format text: CHANGE OF NAME;ASSIGNOR:CONCAST INCORPORATED;REEL/FRAME:004397/0366

Effective date: 19850312

AS Assignment

Owner name: SMS CONCAST INC.

Free format text: CHANGE OF NAME;ASSIGNOR:CONCAST INCORPORATED;REEL/FRAME:004387/0592

Effective date: 19840808