EP0236237A1 - Stranggussanlage für Metall - Google Patents

Stranggussanlage für Metall Download PDF

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Publication number
EP0236237A1
EP0236237A1 EP87400491A EP87400491A EP0236237A1 EP 0236237 A1 EP0236237 A1 EP 0236237A1 EP 87400491 A EP87400491 A EP 87400491A EP 87400491 A EP87400491 A EP 87400491A EP 0236237 A1 EP0236237 A1 EP 0236237A1
Authority
EP
European Patent Office
Prior art keywords
mold
frame
support
continuous casting
installation according
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
EP87400491A
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English (en)
French (fr)
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EP0236237B1 (de
Inventor
Robert Vatant
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.)
Clecim SAS
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Clecim SAS
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Filing date
Publication date
Application filed by Clecim SAS filed Critical Clecim SAS
Priority to AT87400491T priority Critical patent/ATE52432T1/de
Publication of EP0236237A1 publication Critical patent/EP0236237A1/de
Application granted granted Critical
Publication of EP0236237B1 publication Critical patent/EP0236237B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the subject of the invention is an installation for the continuous casting of metal and in particular steel.
  • Such installations have been known for a long time, which generally comprise, on a fixed support frame, an ingot mold and a secondary cooling device aligned along a casting axis.
  • the mold consists of a set of walls cooled by circulation of fluid, delimiting a bottomless casting cavity and mounted on a frame in the form of a sufficiently rigid frame to precisely maintain the positioning of the walls, these possibly being moved to adjust the dimensions of the casting cavity.
  • the secondary cooling device itself consists of a set of guide and cooling members, generally rollers or guide plates associated with water spray bars, the set being mounted on a chassis. support and thus delimiting a corridor placed in the extension of the mold along the casting axis and sometimes called "guide corset".
  • the steel poured into the mold cavity forms, along the cooled walls thereof, a crust whose thickness increases downwards and which is evacuated by the opposite end of the cavity, the cast product, consisting of 'a liquid core enclosed in the solidified crust, then passing into the guide corset, the upper part of which is placed near the outlet of the mold.
  • the cooling continues inside the guide corset which opens, at its lower part, into a product extraction member.
  • the casting can be done vertically or else in a curved manner, the guide corset bringing the product poured vertically to the horizontal point.
  • the mold is carried by support and guiding members allowing oscillations parallel to the casting axis and associated with an oscillation control means whose amplitude and frequency are adjustable as required.
  • the mold As the product is continuous and moves in the guide corset at a substantially constant speed, at each period of the oscillating movement, the mold first of all descends at the same speed as the product, up to a certain level, then rises to the initial level, the walls then peeling off from the product retained by the guide corset.
  • the support and oscillation members must therefore exert a certain effort on the mold.
  • the technique of continuous casting was first developed to produce products of relatively small section, we quickly moved to much larger installations since, currently, we continuously slab slabs of more one meter wide and more than 10 mm thick. The mold then reaches a large size and weight and the support, guidance and oscillation control members must be provided accordingly.
  • the mold is a delicate organ, which must be adjusted with precision and can be damaged by metal breakthroughs, which is why it must be able to be easily removed from the installation for maintenance or adjustment or to be replaced. .
  • the oscillations can be guided by runners parallel to the casting axis and, in this case, to give the desired degree of freedom
  • the support and oscillation lever which normally has two branches placed on either side of the mold, is connected to the oscillation table by two connecting rods hinged on one side on the table and on the other on each of the two branches.
  • the two arms of the lever can also be articulated directly on the oscillation table, the latter being held by two other connecting rods directed in directions substantially parallel to the two arms of the lever, the exact orientation being determined so that the displacement of the mold is made along the casting axis.
  • the lever and the connecting rods are articulated on bearings carried by parts forming support chairs placed and fixed on a fixed platform.
  • the lever is reciprocated by an oscillation control mechanism which, more often than not, is an eccentric mechanism mounted on the support frame at a point relatively spaced from the mold, below the work floor.
  • the forces due to the weight of the ingot mold and the detachment effect, possibly amplified by the levers, are substantial enough and are collected by the bearings of the articulation axes.
  • These bodies are therefore, overall, heavy and expensive and are subject to relatively significant wear due to the high frequency of the oscillations and loads applied.
  • the object of the invention is a new arrangement allowing the mechanisms to be considerably simplified and the loads applied to be reduced so that the assembly is less expensive and easier to maintain.
  • the means for controlling the oscillations of the ingot mold bears directly, on one side on the frame of the ingot mold and on the other on the upper part of the support frame of the guide corset.
  • the upper part of the guide corset generally consists of a cooling element produced in a particular way and forming an upper cage which can be easily removed from the rest of the guide corset for maintenance, repair or rapid replacement by a spare cage, the risks of breakthroughs, and consequently of damage, being greater in this one.
  • the mold is normally placed at a working floor which covers the entire installation placed below. It is advantageous to be able to remove at the same time the mold and the upper element of the corset placed immediately below it while the possible replacement of the other parts of the corset, which is done less often, can be carried out differently. .
  • the upper cooling element which is removably mounted on the frame of the installation, is provided with removable fixing means with the ingot mold and means for hooking on a lifting beam which allows remove the upper element at the same time with the mold which then rests on it.
  • the relative positioning of the two members is adjusted on a support site and then the assembly is replaced, the mold placed on the upper element first being applied to the oscillation table which has remained fixed and the upper element continuing its descent to support members formed on the fixed frame.
  • the oscillation control means is fixed on one side on the chassis of the mold and on the other on the chassis of the upper cooling element.
  • the means for controlling the oscillations is a hydraulic jack, preferably double-acting, comprising a body and a piston connected respectively, by at least two articulated connections, one to the chassis of the mold and the another to the frame of the upper part of the guide corset.
  • This cylinder can, advantageously, constitute itself the support member of the mold which must simply be kept in its path by guide members.
  • the latter are not subjected to the forces due to the weight of the mold and the detachment of the solidified crust and can consist of slides or else connecting rods articulated on a support piece which, according to an additional characteristic of the invention, can be fixed. directly on the chassis of the upper cooling cage.
  • the mold and its means for supporting, guiding and controlling the oscillations constitute, with the upper cooling element, a compact and homogeneous unit, which can be dismantled and reassembled in block and on which the alignment and amplitude of the oscillations can be carried out outside the installation and maintained during operation with all the desired fidelity.
  • FIGS. 1 and 2 show the upper part of a continuous casting installation comprising an ingot mold 1 and a secondary cooling device 2 forming a guide corset, at least the upper part of which consists of a separate cage 20 .
  • the ingot mold 1 constitutes a bottomless mold providing a pouring cavity limited by cooled walls 11 carried by a frame 12.
  • the guide corset 2 comprises, conventionally, two series of guide rollers 24 placed on either side of the product, associated with spray bars not shown and mounted on a support frame 25.
  • the rollers 24 can be grouped into segments each comprising a frame 26 for supporting several pairs of rollers, removably mounted on the frame 25.
  • the latter is based on the foundation mass 3 in a way that allows it to expand in particular.
  • the ingot mold 1 and the upper cage 20 are carried by a fixed platform 33 provided at the upper part of the foundation mass 3, below the level of the pouring floor 31 and on which are fixed, possibly so removable, the support means and guiding the mold.
  • the mold is fixed on a table which is supported by a lever articulated around a fixed horiontal axis and connected to an oscillation mechanism.
  • the oscillation table can be omitted.
  • the oscillation movement is achieved by one or two hydraulic cylinders 5 whose body 51 is rigidly fixed directly to the chassis 12 of the mold while the rod of each cylinder bears directly on the chassis of the upper cage 20 by means of a connecting rod 54.
  • the upper cage 20 itself rests directly on the support frame, the weight of the mold is supported by the oscillation cylinders 5.
  • the mold must simply be guided in its oscillating movement and, in the example shown, a pair of connecting rods 42 is used for this purpose placed on both sides of the chassis below it, and articulated around an axis 43 on the chassis 12 and around an axis 41, respectively on two support chairs 4 each comprising a support plate 45 which can be applied on a horizontal platform 33 formed at the upper part of the foundation solid 3.
  • the supply conduits 13 and discharge 14 in cooling fluid are connected to fixed circuits 16 by removable and watertight connection members 15 comprising two parts fixed respectively on the support plates 45 and on the platform 33 and which engage one in the other when the support chairs 4 are applied on the platform 33.
  • the chassis 12 of the mold must be supported by a second pair of connecting rods articulated on the support chair 4 and on the chassis 12.
  • the second pair holding rods can be replaced by flexible blades 44 fixed at their ends on the support chairs 4 and on the frame 12, on both sides thereof, which further alleviates the assembly.
  • the upper element 20 of the guide corset rests separately on the support frame.
  • the platform 33 being formed on a fixed frame 32, the latter may carry fork-shaped support members 37 placed on either side of the upper element 20 and in which pins 21 rest fixed on both sides of the frame 27 of the cage 20.
  • the latter is provided at its lower part with two other pins 22 which slide in guides 23 provided at the upper part of the corset, either directly either on the support frame, or preferably on the frame 26 for supporting the rollers of the corset segment along the upper cage 20.
  • the arrangements according to the invention make it possible to remove in block not only the ingot mold and the upper element 20 but also all of the means for supporting, guiding and controlling the oscillations. From the outlet, it is possible to adjust in the workshop with precision all the elements which participate in the oscillation of the ingot mold and also the amplitude of the oscillation movements controlled by the jack 5.
  • the support plates 45 are applied to the support platform 33 then the upper cage 20, discharged from the mold, comes to rest by the pins 21 in the forks 37 , the pins 22 engaging in the slides 23 of the segment 26.
  • one of the essential advantages of the invention resides in the fact that, the oscillation cylinders bearing directly on the chassis of the ingot mold and of the upper cage 20 between which the effort of take-off of the walls of the ingot mold, the integration of all the support and guiding elements in the same assembly makes it possible to loop the forces and consequently to lighten the connecting rods 42 and 44 which only provide a guiding role. Likewise, the joints 41 and 43 are no longer subjected to significant forces and can therefore be produced in a simpler and lighter manner.
  • the cylinders 5 for controlling the oscillations of the mold are preferably double-acting cylinders, the two chambers of which are connected to oil supply means 55 by hoses 56 allowing the movements of the mold to oscillate.
  • FIG. 3 gives, by way of example, a diagram of the system 7 for hydraulic supply of the jacks 5.
  • the two chambers of the jack are connected by the hoses 56 to the two outputs of a flow servo-valve 70 whose inputs are connected respectively to supply circuits 71 for pressurized fluid and discharge 72.
  • the flow servo-valve 70 which is for example of the mechanical feedback type, is actuated in a known manner under the action of an electrical signal supplied by a control device 73 and can take three positions, respectively a position neutral for which the circuits are cut and two supply positions each of one of the chambers 57, 58 of the jack 5, the other chamber then being connected to the evacuation circuit.
  • the supply circuit 71 is produced in a conventional manner and in particular comprises a pressure accumulator 74 making it possible to ensure a constant supply pressure and a pressure limiter 75.
  • the discharge circuit 72 is also connected to a pressure accumulator 76 making it possible in particular to force-feed circuits.
  • control device 73 can, by means of mechanical or electrical means that are easy to design, control rapid movements of the servo-valve 70 making it possible to supply the two chambers 57 and 58 of the jack 5 alternately. easily modify during operation not only the frequency of osciallation but also the amplitude and the speed of the movement to choose the profile of the speed / displacement curves allowing to best adapt to the nuances, formats and speed of casting.
  • the cylinders 5 can either ensure only the oscillation of the ingot mold, the weight of which is then supported essentially by the flexible blades 44, or also serve as a means of supporting the ingot mold, the connecting rod 42 and the blade 44 then serving only for guiding along the casting axis.
  • the oscillation could also be controlled by a single jack then placed in the median plane of symmetry of the mold.
  • FIGS. 4 and 5 represent another method of mounting the machine head on the chassis of the guide corset.
  • the ingot mold 1 is guided, as just described, by a pair of connecting rods 42 associated with a pair of flexible blades 44 and articulated on two support chairs 4.
  • the chassis of the upper element 20 the corset is supported by pins 21 on forks 37 ⁇ which are formed on the upper part of the chassis 25 of the guide corset on which the other segments such as 26. are releasably mounted.
  • the chassis 25 also carries, for example on a console part, the slides 23 ⁇ in which engage guide pins 22 placed at the bottom of the upper cage 20.
  • the two support chairs 4 for the connecting rods 42 and the flexible blades 44 are rigidly fixed on the two sides 27 of the chassis of the upper cage 20.
  • the pipes 13 and 14 for supplying and discharging the fluid cooling so, optionally, that the supply and discharge lines of the jack 5 lead to connection members 15 which are fixed on a plate 45 ⁇ placed at the bottom of one of the support chairs 4 and which comes apply to a plate 33 ⁇ to which the different circuits lead.
  • This 33 ⁇ connection plate is preferably resiliently mounted at the upper part of the chassis so as to come to be applied on the plate 45 to make the watertight connection of the various circuits, the support of the assembly on the support frame being however produced by the pins 21 and 22.
  • the oscillation control means is constituted by a uniuqe cylinder 5 placed in the median plane P (FIG. 5) of the ingot mold 1.
  • the movements of the two connecting rods 42, 42 ⁇ placed on either side on the other side of the chassis 12 must be synchronized and, for this purpose, the two connecting rods are fixed on a torsion bar 46 extending from one support chair to the other, on either side of the median plane.
  • the body of the jack 5 is rigidly fixed to the chassis 20 of the upper element, the rod of the jack being connected to the chassis 12 of the mold by a connecting rod 54 articulated at its two ends.
  • the two sides 27 of the frame 20 of the upper element are connected by a spacer 28 on which the body 51 of the jack is fixed.
  • This arrangement has the advantage of allowing the cylinder 5 to be supplied by rigid circuits fixed to one of the sides 27 of the upper element and leading to the connection plate 45.
  • the cylinder 5 is then more difficult to protect from steel projections that may occur in the event of a breakout at the outlet of the mold.
  • the jack is better protected from steel projections when it is fixed directly to the chassis 12 of the mold, as in the case of FIGS. 1 and 2, but it must then be supplied with hoses either from the work floor 31 either from the connection plate 45.
  • the mold is connected, on the one hand with the support frame of the oscillation members and on the other hand with the upper cage and each of these elements must be positioned on the frame or the frame of support by at least two points per side, which multiplies the settings.
  • the machine head according to the invention forms a compact, light assembly which is not very dependent on the other parts of the machine.
  • the forces involved are lower than in conventional constructions, both in terms of dead masses as for the forces due to friction, which are largely closed between the mold and the upper cage.
  • the hydraulic cylinders used for controlling the oscillations of the mold and interposed between the mold and the upper cage are more accessible and better protected in the usual arrangements where the oscillation control mechanism is placed below the floor, near the guide corset proper, that is to say in a wet and dirty one and subjected to high temperatures.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP87400491A 1986-03-07 1987-03-05 Stranggussanlage für Metall Expired - Lifetime EP0236237B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87400491T ATE52432T1 (de) 1986-03-07 1987-03-05 Stranggussanlage fuer metall.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8603282 1986-03-07
FR8603282A FR2598338B1 (fr) 1986-03-07 1986-03-07 Installation de coulee continue de metal

Publications (2)

Publication Number Publication Date
EP0236237A1 true EP0236237A1 (de) 1987-09-09
EP0236237B1 EP0236237B1 (de) 1990-05-09

Family

ID=9332898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400491A Expired - Lifetime EP0236237B1 (de) 1986-03-07 1987-03-05 Stranggussanlage für Metall

Country Status (6)

Country Link
US (1) US4765392A (de)
EP (1) EP0236237B1 (de)
JP (1) JPS62275553A (de)
AT (1) ATE52432T1 (de)
DE (1) DE3762579D1 (de)
FR (1) FR2598338B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015232A1 (de) * 1993-12-03 1995-06-08 Mannesmann Ag Einrichtung zum stranggiessen von stahl
EP0881015A1 (de) * 1997-05-30 1998-12-02 Sms Schloemann-Siemag Aktiengesellschaft Vorrichtung zum Stranggiessen von Stahl

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5219029A (en) * 1992-03-09 1993-06-15 Gunther Behrends Oscillator for continuous casting mold
US5911268A (en) * 1997-10-16 1999-06-15 Custom Systems, Inc. Oscillating mold table assembly
DE102010054398A1 (de) * 2010-12-08 2012-06-14 Sms Siemag Ag Stranggießanlage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528482A (en) * 1967-12-20 1970-09-15 Concast Inc Continuous casting machine
FR2055784A1 (en) * 1969-08-18 1971-04-30 Ural Z Tyaznlloco Mould rocking mechanism in continuous metal - casting plants
DE2248066A1 (de) * 1972-09-30 1974-04-04 Schloemann Ag Vorrichtung zum fuehren einer oszillierenden stranggiesskokille
DE3226530A1 (de) * 1981-09-17 1983-03-24 Voest-Alpine AG, 4010 Linz Stranggiessanlage mit kokille und hubtisch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040397A (en) * 1958-12-17 1962-06-26 Koppers Co Inc Continuous casting machine
US3664409A (en) * 1969-08-08 1972-05-23 Kolomeitsev Adolf P Mold rocking mechanism in a continuous metal casting plant
US4483385A (en) * 1981-11-05 1984-11-20 Amb Technology, Inc. System for oscillating mold tube in continuous steel casting machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528482A (en) * 1967-12-20 1970-09-15 Concast Inc Continuous casting machine
FR2055784A1 (en) * 1969-08-18 1971-04-30 Ural Z Tyaznlloco Mould rocking mechanism in continuous metal - casting plants
DE2248066A1 (de) * 1972-09-30 1974-04-04 Schloemann Ag Vorrichtung zum fuehren einer oszillierenden stranggiesskokille
DE3226530A1 (de) * 1981-09-17 1983-03-24 Voest-Alpine AG, 4010 Linz Stranggiessanlage mit kokille und hubtisch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015232A1 (de) * 1993-12-03 1995-06-08 Mannesmann Ag Einrichtung zum stranggiessen von stahl
CN1043615C (zh) * 1993-12-03 1999-06-16 曼内斯曼股份公司 连续铸钢装置
EP0881015A1 (de) * 1997-05-30 1998-12-02 Sms Schloemann-Siemag Aktiengesellschaft Vorrichtung zum Stranggiessen von Stahl

Also Published As

Publication number Publication date
JPS62275553A (ja) 1987-11-30
EP0236237B1 (de) 1990-05-09
ATE52432T1 (de) 1990-05-15
FR2598338A1 (fr) 1987-11-13
FR2598338B1 (fr) 1989-10-06
DE3762579D1 (de) 1990-06-13
US4765392A (en) 1988-08-23

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