US3566955A - Adaptable drawing mechanism or device for producing strands by continuous casting - Google Patents

Adaptable drawing mechanism or device for producing strands by continuous casting Download PDF

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Publication number
US3566955A
US3566955A US717648A US3566955DA US3566955A US 3566955 A US3566955 A US 3566955A US 717648 A US717648 A US 717648A US 3566955D A US3566955D A US 3566955DA US 3566955 A US3566955 A US 3566955A
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Prior art keywords
conveying
strand
strands
casting
rollers
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Expired - Lifetime
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US717648A
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English (en)
Inventor
Heribert Krall
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Technica Guss GmbH
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Technica Guss GmbH
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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
    • B22D11/14—Plants for continuous casting
    • B22D11/147—Multi-strand plants
    • 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
    • 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
    • B22D11/1284—Horizontal removing

Definitions

  • the invention relates to a drawing mechanism for the continuous or intermittent drawing of strands of metallic stock in continuous casting with at least one conveying system for each strand, consisting of a conveying roller with its driving shaft and press roller opposite to it with pressing device.
  • the casting process serves for the continuous casting of molten metal in moulds open at both ends, whereby the solidifying metal within the mould is drawn out in a solid state, and of the shape relative to the configuration of the mould.
  • the resultant shape, designated as strand is drawn by various conveying rollers and gripper systems.
  • the direction of force ap plied to draw the strand has to be applied opposite to the casting axis with precision and uniformity.
  • the horizontal continuous casting process is of special im portance in plants where bending from the vertical casting direction to the horizontal working direction, is not possible, in other words, when producing various metal sections that cannot be hot or cold formed.
  • the drawing of the strands in horizontal or vertical casting is effected by means of conveying rollers or by means of gripper systems.
  • the conveying rollers are driven, and in most cases, the counterpressure is exerted by press rollerswhich are pressurized pneumatically, hydraulically, or mechanically, or by other suitable means i.e. they are pressed onto the casting strand.
  • the known casting plants accordingto the continuous casting principle are working either with one single strand or more strands, i.e. oneplant is suitable for casting one or several strands respectively at the same time and side by side.
  • the strands are flush side by side or clustered; e.g. in the four-strand process 2 X 2 strands are arranged in-a square.
  • a continuous casting machine is of particular significance which facilitates a conversion when changing the manufacturing programme.
  • Another advaniage of this device is that one independently driven drawing mechanism is provided for each strand.
  • each stand can be drawn by itself, and independent of the other strands.
  • the conveying devices now remaining regarding the number of strands it is possible, when using the device according to the invention, to operate a five-strand plant in such a way that in the one extreme case five sttands are driven and drawn differently and in the other extreme case one single strand. which is drawn by several, or all conveying devices of the plant, if need be.
  • This special case applies particularly when casting heavy blocks.
  • the mechanical driving power of the individual conveying devices can be kept lower than necessary, if a heavy block had to be drawn by a single conveying device.
  • the device according to the invention is extremely variable, viz. with regard to the strands to be drawn, the independent conveying speed of the individual strands and the efficiency and power requirements for conveying cast strands of large dimensions and weight.
  • the invention relates to a device for the continuous or intermittent drawing of metal strands in the continuous casting process with at least one conveying system for each strand, consisting of a conveying roller with its driving shaft and an associated press roller with a proper pressing device.
  • One of the features of the invention for attaining this object is that for each strand at least one independently driven conveying roller is provided, and the conveying rollers on their driving shafts are arranged in series in the direction of the casting axis as well as the press rollers with their driving devices are arranged across the casting axis and are displaceable.
  • FIG. 1 shows schematically in plan view a four-strand method of operation with four driving shafts each having a conveying system arranged in series in the casting direction from left to right; v
  • FIG. la shows schematically in plan view a two strand method of operation where two conveying'systems draw each strand from left to right;
  • FIG. lb shows schematically in plan view a single-strand method of operation with four conveying systems spaced along the casting axially from left to right;
  • FIG. 2 shows a vertical crosssectional view of the conveying system working on one strand in the four-strand operation according to FIG. 1;
  • FIG. 3 shows a diagrammatic sectional view along line AA of FIG. 2.
  • one conveying system consists thus of .one conveying roller on its driving shaft, and at least one press roller with its pressing devices;
  • Each conveying system is adjustable as a whole. Supposing, for example, that the plant has been designed for a maximum of four strands, then at least four conveying systems have to be provided, whereby each conveying system handles one strand, and is displaceable across the casting direction on its driving shaft.
  • the driving shafts of the conveying rollers as well as the support and alignment rails of the pressing devices for adjusting the press rollers are arranged in a staggered series in the casting direction.
  • a four-strand plant for example, can be set to the following working program: Four. thin sections whereby each strand is drawn by one conveying system;
  • One strand of large dimension is cast and now drawn by one up to four conveying systems.
  • the conveying systems act on the strand in line ahead of each other in the casting direction.
  • a plant with a maximum capacity of six strands can operate with six, three, two strands or one strand.
  • the conveying systems act according to the above specification. As a matter of fact the plant can also be operated asymmetrically. Keeping to the example of a fourstrand plant, it is possible to produce two thin sections with one conveying system each and to draw one larger section with the remaining two conveying systems.
  • the only prerequisite for the device according to the invention is that the cast strands are arranged side by side extending in one plane.
  • the device according to the invention is suitable for vertical as well as for horizontal casting.
  • the conveying systems can be driven continuously, ie at a uniform speed without interruption or also intermittently. A complete adaption to the specific casting process, and the subsequent cooling of the strand until solidification to such an extent that the strand can be gripped by the rollers is possible without any dif ficulties and without any major expensive changes.
  • a further example of application of the device, according to the invention is the significance of the conveying systems driven independently of one another. If, for example, a fourstrand plant is used working with two thin strands driven by one conveying system each, and one larger strand driven by two conveying systems, then it is, of course, desirable that the drawing speed of the thin strands, and the thick strand be governed by the time of solidification and the heat dissipation in the cooling interval, and not to the contrary that the casting process has to be adjusted to the rate of drawing.
  • these independently driven conveying rollers different sections can also be produced simultaneously with a multistrand plant.
  • the drawing speed of the strand will depend to a certain degree on the cross section of the strand and directly to the rate of the heat loss in the mold and after leaving the mold.
  • thedevic'e according to the invention leads to a simplification of the casting process itself, due to the possible variable drawing rates for each independent strand.
  • the special design, mounting, mechanical function, dri e, etc. of the components of the conveying system is essentially constructed in the known way.
  • the driving shafts for the conveying rollers are set in motion via bevel gears for the power transmission from an electric motor to the driving shaft.
  • the conveying rollers themselves may have every usual shape, i.e. from cylindrical to double-conical, whereby the double cone matches up with the section of the strand.
  • the conveying roller itself is mounted on the driving shaft and can be slid laterally along the shaft, and can be fixed in the desired position in the known way.
  • the press rollers can be used which are preferably cylindrical. Frequently, they are mounted in a bracket; as usually the contact pressure is applied by a pressing device-cg. hydraulically, pneumatically or by electric motor.
  • the pressing device and possibly also the press rollers themselves are supported on alignment rails so that they are adjustable across the casting axis in relation to the conveying rollers. They are fixed in the desired position in the usual way.
  • the four strands S1 to S4 according to FIG. 1 are arranged in one plane.
  • the four driving shafts At to Ad for the four conveying systems T1 to T4 are arranged in series in casting direction, each stands being drawn by one conveying system.
  • FlG. 1a shows the two-strand method of operation, whereby the two conveying systems T1 and T2 draw strand SA and two conveying systems T3 and T4 draw strand SB. Contrary to their position in FIG. 1 all four conveying systems are adjusted to the casting axis by a displacement along their shafts across the casting direction.
  • FiG. 1b shows a single-strand operation, whereby in this special case all four conveying systems Ti to T4 are centered on the casting axle by a corresponding adjustment across the casting direction. Of course, in case of single-strand operation all four conveying systems must not in all cases by used for drawing a strand. 7
  • FIGS. 2 and 3 can be seen that in a frame 1, 1' the shaft Al is mounted in the bearings Z, 2' and can be rotated by the driving unit (not shown). On the shaft A1 a double-cone conveying roller 3 is mounted which draws the strand S1. The press roller 4 is pivoted in fork 5 and is pressed onto the strand by the pressing device 6 which can be displaced across the casting direction. For example, the displacement of the pressing device 6 can be effected via the alignment rails 7, 7 mounted to frame 1, 1 means of the corresponding fixing means.
  • FIG. 3 shows the form of construction according to FIG. 2 in the section A-A.
  • the conveying systems T shown in FlGS. 1, 1a, lb and 2 comprise rollers 3 and d and their related equipment.
  • Mechanism for the simultaneous drawing of several strands of metallic stock in continuous casting with at least one independently driven conveying system for each strand consisting of a conveying roller with its drive shaft on which it is slidably mounted and press roller means mounted opposite to it for sliding movement on a mounting shaft, in which the conveying systems associated with each strand are arranged one behind the other in the direction of the casting and in which the conveying rollers and press rollers of each conveying system are movable in the direction oftheir shafts to a conveying roller position of each stand, said drive and mounting shafts extending crosswise the several strands.
  • a drawing mechanism for the continuous or intermittent drawing of strands of metallic stock in continuous casting havat least one conveying system for each strand consisting of a conveying roller with its driving shaft and a press roller opposite to the conveying roller and having means for applying a pressure thereto;
  • said conveying roller having independent drive means
  • said conveying rollers being mounted on driving shafts and arranged in series and spaced from each other in the direction of the casting axis;
  • said press rollers and their pressing devices also being arranged in series and spaced from each other in the direction of the casting axis;
  • conveying rollers being shiftable laterally from one strand to another strand on their drive shafts which extend transverse to the direction of the drawing of the strands;
  • said press rollers and their pressing devices being mounted on rails extending transverse to the direction of the drawing of the strands and shiftahle laterally from one strand to another strand to a position for cooperation with their respective conveying roller.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US717648A 1967-04-05 1968-04-01 Adaptable drawing mechanism or device for producing strands by continuous casting Expired - Lifetime US3566955A (en)

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DET0033603 1967-04-05

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BE (1) BE700153A (xx)
DE (1) DE1558319B1 (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036284A (en) * 1975-03-19 1977-07-19 Rudolf Hoffmann Continuous casting apparatus for slabs
US4592409A (en) * 1980-08-08 1986-06-03 Mannesmann Aktiengesellschaft Strand guide for multi-strand metal casting apparatus
US5123147A (en) * 1990-09-20 1992-06-23 Pacific Scientific Company Restraint harness buckle assembly and method of making
US20090025929A1 (en) * 2007-07-26 2009-01-29 Frank's International, Inc. Apparatus for and Method of Deploying a Centralizer Installed on an Expandable Casing String

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923108C2 (de) * 1978-01-04 1986-05-15 Voest-Alpine Ag, Linz Treibwalzengerüst für eine Stranggießanlage
DE3720692C1 (en) * 1987-06-23 1988-09-01 Rexroth Mannesmann Gmbh Drawing machine, especially for a continuous casting installation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1530847U (xx) *
GB980420A (en) * 1963-01-08 1965-01-13 United Steel Companies Ltd Continuous casting machines
DE1531195A1 (de) * 1967-07-20 1969-08-07 J L Huetten Gmbh Hydraulische Haltevorrichtung fuer Verzoegerungsfrei loesbare Verbindung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036284A (en) * 1975-03-19 1977-07-19 Rudolf Hoffmann Continuous casting apparatus for slabs
US4592409A (en) * 1980-08-08 1986-06-03 Mannesmann Aktiengesellschaft Strand guide for multi-strand metal casting apparatus
US5123147A (en) * 1990-09-20 1992-06-23 Pacific Scientific Company Restraint harness buckle assembly and method of making
US20090025929A1 (en) * 2007-07-26 2009-01-29 Frank's International, Inc. Apparatus for and Method of Deploying a Centralizer Installed on an Expandable Casing String

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Publication number Publication date
BE700153A (xx) 1967-12-19
DE1558319B1 (de) 1970-07-30

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