EP0018350B1 - Dispositif de coulée continue, notamment pour la fabrication de brames - Google Patents

Dispositif de coulée continue, notamment pour la fabrication de brames Download PDF

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Publication number
EP0018350B1
EP0018350B1 EP19800890036 EP80890036A EP0018350B1 EP 0018350 B1 EP0018350 B1 EP 0018350B1 EP 19800890036 EP19800890036 EP 19800890036 EP 80890036 A EP80890036 A EP 80890036A EP 0018350 B1 EP0018350 B1 EP 0018350B1
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Prior art keywords
strand
beams
frame
transverse
plant according
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EP19800890036
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German (de)
English (en)
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EP0018350A1 (fr
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Max Burkhard
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Individual
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Individual
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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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1288—Walking bar members

Definitions

  • the invention relates to a continuous caster, in particular for producing slabs with a coolable continuous mold, a straight or curved strand guide for transporting, cooling and possibly deflecting the strand, which has a guide frame into which two mutually opposing rows of walking bars are installed each of which can be periodically adjusted against the strand by means of a drive device, can be moved by a predetermined transport step, can be lifted off the strand and can be returned to its starting position, the movement cycle of the walking bars belonging to one group being approximately one compared to the movement cycle of the walking bars belonging to another group half period is offset, and in the case of an arcuate strand guide with an adjoining straightening device with drivable straightening device arranged in the frame with drivable straightening tools arranged in the frame for straightening the S tranges and all walking bars are designed as transverse bars running transversely to the longitudinal median plane of the strand and in pairs opposite one another with respect to the strand (DE-B-1 608 352).
  • Every continuous sheet caster is the strand guide, in and with which the strand which essentially emerges from the mold is deflected and cooled.
  • Straight or arcuate strand guides with rollers arranged in a row on both sides of the strand are known.
  • Each row contains a significant number of rollers, which are not only mechanically but also thermally stressed, which is very high and unfavorably, and are therefore far less stable than might be expected. Since the strand shell is supported by each roller only along a very narrow area strip, adjacent rollers in each row must be as close as possible to one another.
  • the space available for accommodating the device for spraying cooling water is very narrow and is disadvantageously designed, so that only a central surface zone of the strand shell section between adjacent rolls can be effectively cooled, since the rolls themselves do not contribute to the cooling.
  • the strand shell is not supported in these sections, can therefore bulge and is often bent out and back as it passes through the rows of rollers, which adversely affects the structure of the solidified strand.
  • Blocks of very different cross-sectional formats are required by the processing industry.
  • the production of such blocks by cutting a strand to the desired cross section means converting an existing continuous casting plant to this cross section.
  • the company has started to cut the blocks out of slabs, which should be as wide as possible for economic reasons, but whose broad sides must be flat and parallel.
  • blocks formed from a longitudinally divided, 2700 mm wide slab can no longer be properly rolled out if they are about 1.5 mm thicker on one of their narrow sides than on the other.
  • the slab width that can be achieved purely by casting technology cannot currently be used, because the curvature of the broad slab sides is determined by the deflection of the rolls in the case of strand guides equipped with rolls.
  • the slab widths that can be used are governed by the permissible deflections of the rolls, the rule of thumb being that the roll diameters must change in the same ratio as the slab widths. This results in the currently valid limit for the slab widths, beyond which the rollers become too heavy and the distances between the support points of the strand shell are too great. While it has been suggested not only to support or divide the rollers at their ends but also between them, these measures have not proven successful.
  • Continuous-arch casting systems have also been proposed and built, the strand support of which is equipped with walking beams arranged on both sides of the strand.
  • These walking beams are designed as longitudinal beams curved in accordance with the shape of the continuous arch, with two broad groups of such beams opposing each broad continuous surface and between two adjacent beams of one group and one of the other associated beams.
  • Each bar group can be adjusted against the strand, can be moved in the longitudinal direction in the engaged state, can be lifted off the strand and can be returned to the starting position in the raised state, and the movement sequences of the two longitudinal bar groups are shifted in phase by essentially half a period.
  • the support of the strand and its cooling are improved because the coolable longitudinal beams lie flat against the strand shell, but the weight and, in particular, the masses to be moved are large in the case of strand supports for wide slabs.
  • the individual longitudinal beams do not extend over the entire length of the strand arch, which can be 15 m or more, for example, in the case of strands of large cross section, but rather in the longitudinal direction are divided, so that the entire strand guide is made up of several contiguous sections.
  • the reduction in the total mass to be moved and its distribution that can be achieved in this way cannot contribute to reducing the difficulties associated with the drive, which are due to the need to arrange the drive elements necessary for each beam above or below the strand and to expose its heat radiation.
  • the entire drive arrangement is therefore difficult to monitor, inaccessible and subject to high temperatures during operation, which is why relatively minor defects can only be remedied after the system has been switched off and cooled down.
  • the removal and installation of the middle walking beam located between the two outermost and subject to greater wear is a difficult and time-consuming work.
  • the practically usable frequencies of the beam movement are restricted upwards.
  • the aim of the invention is a continuous caster with a strand guide, which allows the casting of slabs with a width which is considerably greater than the usual, which is lighter overall than the known one and in which the mass to be moved is broken down into a large number of comparatively small masses.
  • each crossbeam is connected to the one end of at least one plunger and is supported by the plunger or plungers against the guide frame, the plungers for starting and lifting as well as for the transport and return movement of the crossbar are drivable and preferably also the tools of the straightening device are designed as crossbars supported with punches against the scaffold or a device frame and can be adjusted or lifted off the strand with the aid of the punches.
  • the weight of the strand guides of continuous casting plants according to the invention is considerably less than the weight of comparable walking beam guides with longitudinal bars, the weight saving becoming noticeable with slab widths of approximately 200 cm and increasing considerably and progressively with increasing slab width.
  • the drive devices or their elements can be laid on both sides, as well as simple and reliable, they are outside the high temperature range and can be screwed on in their entirety.
  • the ferrostatic forces are transmitted from the walking beams directly to the guide frame in the system according to the invention, so that the actual drive does not have to be dimensioned excessively heavy.
  • the crossbeams can be relatively narrow and be arranged at intervals which readily allow the installation of devices for effectively cooling the strand with sprayed-on coolant, and the division into a large number of low-mass parts makes it possible to significantly reduce the sequence frequency of the movement cycles compared to the hitherto usual ones to increase.
  • the strand usually enters the strand guide at a temperature of at least 1000 ° C and out of it at a temperature of 500 ° C. All crossbars rest against the strand along a surface strip, within which the temperature drop in the longitudinal direction is small, for. B. is 0.3 ° C / cm. There is therefore no danger that the crossbeams will warp as a result of temperature differences.
  • crossbeams of a pair of crossbeams or a plurality of consecutive crossbeam pairs of the strand guide and / or the straightening device together with the stamps in a common frame and with this to form a detachably attachable to the guide frame unit, preferably all units containing the same number of crossbeam pairs are identical to one another.
  • the installation and removal or replacement of crossbars is then particularly easy and can be done from the side.
  • Each crossbar can be supported with two or more, but most simply by means of a single plunger, which advantageously extends essentially over the entire length of the bar. It is advisable if at least that crossbeam which is the mold first can be driven individually; it may even be advisable to drive all crossbars individually.
  • From the respective conditions, e.g. B. from the metal to be cast and the cross section of the strand depends on how far it is possible to drive a number of consecutive crossbars together to simplify the strand management, in particular to combine two adjacent or three consecutive to a drive group in which a crossbar is directly driven is and with this the others are coupled to drive movement.
  • a combination is recommended, in which the crossbar, which is the mold first, and a number of the bars following it individually and each of the remaining crossbars several, successive, e.g. B. two or three can be driven together.
  • the solidified strand shell is still thin in the vicinity of the mold and can be expanded under the influence of the ferrostatic pressure.
  • the strand is always supported over a crossbar width at points spaced apart from one another by a little more than a crossbar width and can bulge between the relatively dense support points.
  • the bulges which are not very important in themselves and which are not very significant in themselves, and which develop relatively slowly, can, however, be intercepted if the crossbeams are moved with correspondingly high repetition frequencies, so that the strand shell is only slightly bent back and forth, which is very is desired.
  • the forces to be exerted or taken up by the crossbeams can e.g. B. generated or collected with hydraulic cylinders that are reciprocable along the strand guide. It is more advantageous, however, to design all the stamps supporting a crossbar as levers, one end of which is attached to the crossbar, preferably articulated, and the other ends of which are pivotally connected to the guide frame or the frame, because the crossbar is then more flexible and conforms to the shape of the Can adjust strand area automatically.
  • the pivot point of the lever or the lever of at least one crossbeam of some, but preferably all, of the crossbeam pairs is arranged on a bolt loaded with a force and displaceable against this force, in particular on the piston rod of a hydraulic cylinder or the like.
  • This variant allows the compressive forces acting on the strand to be limited at the top because the crossbeam can deflect.
  • the bolt can be adjustably fastened to the guide frame or the frame so that it is possible to adjust all the beams individually and relative to one another and to adapt the course of the arc determined by the strand guide to a predetermined desired shape precisely and conveniently.
  • This target shape is not definitively determined once and for all, but is entirely changeable, it being possible, in particular and also subsequently, to set the arch shape which has been found to be best suited to the entire production process.
  • the design of the crossbeams is largely independent of the desired arch shape, for example, crossbeams designed for circular arch guides can also be easily installed in wicker arch guides and vice versa, which is not permitted with longitudinal walking beams because they must be precisely adapted to the strand curvature and also require a curvature that is invariable in the longitudinal direction of the strand.
  • the one or more crossbar supporting levers are designed as toggle levers and both lever arms of at least one toggle lever can be driven, the toggle lever arm on the beam side near the articulation point on the crossbars, the other toggle arm each having a link guide in the vicinity of the knee joint and in each link slot the pin engages a stationary, drivable crank.
  • the lever or arms supporting a crossbar as a pivot lever and to drive at least one pivot lever for a reciprocating movement, e.g. B. with a link guide for the pin of a stationary drivable crank, the end of the pivot lever remote from the strand is preferably movable by means of a pressure medium cylinder against the strand and away from it.
  • the cooling of the strand is straightforward in the continuous casting plants according to the invention, because the crossbars lying flat against the strand bring about extensive heat removal if they themselves are adequately cooled.
  • Such cooling devices effect not only sufficient cooling of the crossbeam, but also of the socket joint connection with the lever and the latter.
  • spraying the strand with cooling water can be dispensed with and e.g. B.
  • Crossbars have proven to be very effective, which have a number of cells separated by web walls, which are open on their front side facing the strand and open on the rear side, or on their rear side each with a rear wall which is provided with a passage opening, whereby nozzles for spraying the strand surface through the cells are attached to the rear of the bar.
  • the crossbeam touching the strand is immobile in relation to it, so there is no sliding friction and forces originating from it and which stress the solidified strand jacket.
  • the strand guide contains many elements which follow one another at relatively short intervals and are provided with contact surfaces, namely the crossbars.
  • a proper adaptation between crossbars and strand links makes it possible to arrive at cold strands which are satisfactory in every respect and consist of relatively few hinged links and are therefore relatively short, light and therefore easy to manipulate.
  • the links are designed as cross bars approximately the same width as the cross bars; the crossbars have at one end or at both of them a section provided with a longitudinal profile and on the strand guide on one side or on both sides an extension is formed which interacts with a bar section and is provided with a profile complementary to its profile.
  • strand guides with an arc radius of approximately 10 m, such a cold strand need not be longer than 2 to 3 m and can be handled very easily by means of the overhead crane.
  • FIG. 1 a and 1 b show an arc continuous casting installation according to the invention in a longitudinal section
  • FIG. 2 shows a frame
  • FIG. 3 shows a section along line 111-111 of FIG. 2
  • FIG. 4 shows a toggle lever drive in four phases of movement
  • Fig. 5 a group of three jointly drivable toggle levers
  • Fig. 6 a swivel lever including drive
  • Fig. 7 a variant of a swivel lever
  • Fig. 3 and a sectional view of an embodiment of a crossbeam
  • Fig. 10 a strand guide with inserted cold strand.
  • the continuous sheet caster shown in FIGS. 1b and 1b has a coolable continuous mold 1 which is fastened to a horizontal support 2 connected to stands 3.
  • a cooling section 4 is arranged, in which the extruded strand 5 is guided along bars which cross each other in a lattice manner and the spray devices (not shown), e.g. B. contains nozzles or nozzle pipes for spraying a coolant through the window onto the strand surface.
  • the cooling section is followed by a strand guide, to which a number of crossbeams supported against an arcuate guide frame 6 belong and which is intended to guide the strand leaving the cooling section 4 in a substantially vertical direction along an arc in the horizontal direction.
  • the crossbeams are arranged in an upper row which faces the upper, concave of the two curved strand surfaces, and in a lower row which lies on the side of the lower, convex strand surface. All crossbars are assigned to one another to the extent that each bar 7 in the upper row is opposite a bar 8 in the lower row.
  • the individual pairs of crossbeams are each housed in a frame 9 (FIGS. 2 and 3) and each beam 7, 8 is connected to a single stamp extending over all or a substantial part of its length, which acts as a toggle lever 70 or 80 is formed.
  • the use of a single stamp is not mandatory, but in most cases it is much simpler than the possible support with two or more stamps.
  • the crossbar 7 or 8 is articulated to the free end of the toggle arm 71 or 81 on the strand side, whereas the free end of the other toggle arm 72 or 82 is articulated to a cross member 90, 92 of the frame.
  • the frame are placed on the arcuate guide frame 6 and detachably fastened to it by means of screw bolts or the like, so that they can be individually assembled or replaced, and simply, from the side, without any special work and without the aid of devices other than those already available Cranes of the plant. Another advantage is the simple and weight-saving construction.
  • the guide frame can be constructed from simple arch supports and is not loaded with any forces other than the weight of the units consisting of frame, beam and their drive levers and the weight of the strand, whereas all the forces required for the strand transport or their reactions are from the frame 9 are included. These are essentially tensile forces to be absorbed by the longitudinal frame members.
  • the frame 9 consists of two longitudinal spars 91 which are connected at their upper ends to the cross spar 90 and at their other ends to the cross spar 92, which is provided with foot plates which can be screwed onto the frame.
  • Each of the two crossbeams 7 and 8 is articulated to the adjacent toggle lever arm 71 and 81 by means of a socket joint, which consists of a circular cylindrical socket 73 and 83 formed on the beam and extending over its entire length, and from a hollow cylinder 74 that contacts the surface thereof or 84, who sits at the free arm end.
  • a nozzle tube can be arranged inside the hollow cylinder, with which cooling liquid can be sprayed against the side of the cylinder inner wall opposite the pan.
  • FIGS. 8 and 9 A further embodiment of a crossbar can be seen in FIGS. 8 and 9.
  • This crossbar 100 has a number of cells 101 with axes normal to the string broadside. The cells are laterally delimited by web walls 102 and separated from one another. In any case, the cells are open on their front surface facing the strand, they are open on the back (FIG. 8) or partially covered by a rear wall 103 (FIG. 9).
  • This rear wall is provided with a passage opening 104 in the area of each cell. Each rear cell opening or passage opening is juxtaposed with a nozzle 105, from which cooling liquid can be sprayed through the cell onto the strand surface.
  • the nozzles are connected to the crossbar and are located, for example, on feed pipes that extend between two end walls 106 of the beam. With such crossbeams a completely sufficient support and at the same time a very effective cooling of the strand can be achieved.
  • the toggle 70, 80 and accordingly their z. B. a pivot joint, connected arms 71, 72 and 81, 82 can be formed as extending over the entire length of the cross beams 7 and 8, stiffened with transverse walls, and are pivotally attached with their outer ends.
  • the lower toggle arm 82 of the lower toggle lever is rotatable about pivot bearing 64 which is stationary relative to the cross member 92 of the frame, whereas the pivot points of the arm 72 of the other toggle lever on the cross member 90 of the frame are adjustable in the normal direction to the strand.
  • a hydraulic cylinder 93 is placed on each of the cross bars near its two ends, the piston rods of the two cylinders are connected to a cross bar and this is pivotally connected to the end of the toggle arm 72.
  • the upper toggle lever 70 is therefore not connected to the frame at a position which is immovable relative to it, but the pivoting point of its arm 72 can be shifted normally to the strand also during the operation of the system, specifically against the force exerted by the hydraulic cylinder and thus adjustable.
  • the lower toggle lever 80 or its arm 82 can also be connected to the frame via hydraulic cylinders 93.
  • the task of deflecting and transporting the strand by means of the strand guide which incidentally is less about pulling out the strand than braking it, requires an orderly transport movement of the crossbeams.
  • the strand must always be held so that the movement determined by crossbeams can be impressed on it.
  • the crossbar pairs are kinematically combined into groups and the movements of the bars of such a group are offset by practically half a period compared to the movements of the bars of another group, i. H. the bars of one group are positioned against the strand and are moved a certain distance to transport them, while at the same time the bars of the other group are lifted and returned to their starting position.
  • the crossbars can be driven individually and combined in such a way that each bar, with the exception of the end bars of one group, lies between two bars of the other group.
  • the invention also allows a combination of these options.
  • the strand shell In the vicinity of the mold, the strand shell is thin and may therefore only be unsupported for relatively short distances, but at the end of the strand guide it is already thick enough to withstand the ferrostatic pressure even over longer distances.
  • a number of individually drivable crossbeam pairs are therefore preferably arranged in the vicinity of the mold, whereas subgroups of e.g. B. connect two or more pairs of crossbars that can be driven together.
  • FIG. 4 illustrates which shows the four phases a, b, c, d of the movement sequence.
  • a link guide 78 is attached to the toggle lever arm 72
  • a link guide 79 is attached to the other toggle lever arm 71, in the vicinity of its articulation point on the crossbar 7.
  • the guideways of the two for. B.
  • disc-shaped link guides 78 and 79 protrude pins of stationary cranks 78 'and 79', which are driven in the same direction, counterclockwise in Fig. 4 and offset from each other by a predetermined phase angle of about 90 °.
  • the positions which the cranks 78 ', 79' assume at the beginning of the movement phases a to d are entered in the four figures.
  • the crossbar 7 is placed against the strand which is transported in the course of this phase by the distance indicated by the arrow s.
  • the lifting of the crossbar begins, which ends at the end of the phase, whereupon the return movement of the lifted bar (arrow h) begins, which lasts until the end of phase c.
  • phase d the bar is switched on again.
  • the vector diagrams illustrate the path covered within each phase and the previous four phases, and does so in a simplified manner, namely in the form of a square or its sides.
  • the guideways of the link guides are drawn as straight elongated holes. In practice, it may be advisable to use curved guideways to coordinate the lifting and transporting movements of the crossbeam more precisely.
  • Side-by-side toggle levers can be connected by means of cranks 89 and coupling rods 88 provided in the vicinity of their ends adjacent to the crossbeams and can be driven together (FIG. 5). It is then sufficient to drive one of the coupled cranks on adjacent and jointly driven toggle levers.
  • the motor drive power required for each pair of bars can be comparatively small, because the toggle lever mechanism ensures sufficiently large contact forces between the bars and the strand. It is therefore advisable to drive the pairs of beams or the coupled pairs of beams individually, because the motors, gears and all other components involved in the power transmission are light enough to allow them to be attached to the sides of the guide frame or the longitudinal spars of the frame, which is why Set up support brackets but no changes to the frame design are required.
  • drive motors because compressed air and hydraulic fluid are practically always available, pneumatic or hydraulic flow machines are definitely possible, but above all electric motors, the reliable synchronization of which does not pose any problems.
  • the movement of the crossbeams can basically be broken down into a transport movement and a positioning movement in various ways. This is very easily done with stamps of the type shown in FIGS. 6 and 7.
  • the stamp is designed as a simple lever 111, at one end of which the crossbar 7 is fastened, for. B. articulated and the other end is pivotally connected to the piston rod 113 of a pneumatic or hydraulic drive 112.
  • the actuator is double-acting.
  • the two compartments 114, 115 into which the cylinder space of the drive unit is divided by its piston, the one further away from the lever 111, 114, is permanently connected to a compressed air source, e.g. B. a container containing air under a predetermined pressure.
  • the piston is therefore continuously loaded in the direction against the strand, which depends on the piston surface and the pressure of the compressed air and is therefore adjustable by changing this pressure.
  • the other cylinder compartment, 115 can optionally be connected to or separated from a pressure source, such as a container, which contains gaseous or preferably liquid pressure medium under higher pressure. If the compartment 115 is depressurized, the crossbar is set against the strand with the force which corresponds to the load on the piston with the compressed air contained in the compartment 114. If pressure medium is let into the compartment 115, the piston is lifted against the contact force due to the higher pressure prevailing in this compartment. This adjustment stroke can be limited by means of stops. In this way, the shut-off movement is impressed on the crossbeam.
  • the transport movement of the crossbar can be produced with a drive in the manner of an oscillating crank loop.
  • the lever 111 then has a slot 116 which is parallel to the piston rod 113 and into which projects a pin which projects from a stationary crank 117.
  • the crank is advantageously arranged in the vicinity of the beam 7.
  • the transport movement according to stroke and frequency is determined by the crank or its speed.
  • the times in which the compartment 115 is connected to the associated container, must be coordinated with the crank rotation, as hardly needs to be discussed in more detail. It goes without saying that instead of one cylinder, two can be provided, in each of which one of two pistons seated on a common piston rod is accommodated.
  • the adjusting movement does not necessarily have to be derived by means of a pneumatic or hydropneumatic device; for this purpose, a nut 118 which can be moved in a non-rotatable and non-rotatable manner can also be articulatedly connected to the outer end of the lever, into which a non-displaceably mounted spindle 119 is screwed.
  • the spindle can be driven by a motor 121 via a gear 120.
  • the cylinders can be assembled and advantageously be adjustably attached to the frame of the strand guide or to the frame in the normal direction to the strand surfaces to be supported, so that an adaptation to different strand thicknesses is very easily possible.
  • strand guides designed according to the invention which do not contain large contiguous masses allow the transport movement of the strand to be divided into many small and rapidly successive steps, e.g. B. in thirty steps / min or more.
  • the times during which the solidified strand shell is unsupported in sections are then only a few seconds and during these short periods of time there is only a very limited bulging, which is known to be relatively slow. the flexing of the strand shell detrimental to the formation of the desired strand structure is therefore reduced to an insignificant degree.
  • the frame 6 of the strand guide can also be designed in a simple manner, especially if it is intended for mounting frame frames.
  • the guide frame can have a number of continuous, essentially arc-shaped side members, e.g. B. box girders, with top straps curved or curved according to the shape of the strand.
  • These longitudinal beams are immovable approximately in the middle against a foundation, and movable with both ends, advantageously vertically movable in the vicinity of their mold-side end z. B. against a surface of a stand 3 and near its other end horizontally movable against the foundation or a support block.
  • Frame frames can be placed on the upper sides of all the longitudinal beams in a cylindrically curved surface with the desired arc shape of the cross section to be guided, and frame frames can be attached and detachably fastened to the carrier sections, for example by means of screws.
  • the adaptation to the arch shapes need not be strict.
  • the frame or units assembled with them can be installed from the side and therefore do not need to be raised significantly above their installation height.
  • guide frames 6 and the crossbeams 7, 8 of this type can also be viewed from below due to the lateral arrangement of the drive devices.
  • the firm support of the arch support from below approximately in the middle between the movable supports of the arch ends guarantees a kink-free load even during operation, because the effects of temperature-related changes in length come into play at largely uninfluenced points.
  • a cold or start-up strand is an essential accessory of every continuous caster.
  • the inventive design of the walking beam holding and transporting the walking beam as a successive crossbar in the longitudinal direction of the strand allows the strand to be supported at many and relatively close to one another, because the crossbars can be relatively narrow and closely adjacent.
  • the center planes of adjacent crossbeams can project from each other by 4 dm and the adjacent lower beam edges from each other by about 1 dm.
  • start-up line from links which are connected to one another in an articulated manner, in which the distance between adjacent joint axes corresponds to the pitch of the transverse beam row, that is to say the distance between the central planes of adjacent transverse beams, that is, for example, also 4 dm.
  • Such a start-up line can therefore be relatively short and smooth and relatively light, so that it can be easily minipulated.
  • Fig.la the space requirement is small.
  • a cold strand 131 consisting, for example, of eleven links 132 can be carried by a running frame 133, which is not necessarily but advantageously attached to the top of the horizontal beam 2 or between the longitudinal beams of this beam construction and can be moved along the same.
  • the cold strand lies on an endless chain or the like, 134, which can be driven by the same motor 135 as the chassis or by its own motor.
  • 10 shows, in a representation corresponding approximately to FIG. 2, two transverse bars 7, 8 which can be driven with toggle levers, between which there is a link 132 of a cold strand.
  • the links are designed as cross bars with a middle section corresponding to the length of the cross beams 7, 8, the cross section of which practically corresponds to the cross section of the strand to be produced.
  • a side rod section 136 connects on both sides, which with a longitudinal profile, z. B. is provided with one or more longitudinal ribs.
  • This longitudinal profile stanchions are complementary to the longitudinal profiles of two, each on one side of the crossbars 7, 8, arranged approaches 137, 138.
  • the interlocking profiles of the rod sections or approaches, the z. B. can be arranged on the correspondingly wide toggle arms 71, 81, secures the cold strand against lateral sliding out of the space between the opposing rows of crossbars.
  • a straightening device (FIG. 1b), the tools of which are also designed as crossbars and are therefore designated as 7, 8 as they are.
  • These crossbeams face each other in pairs, can be set against the strand 5, can be moved back and forth in the longitudinal direction of the strand and are supported against a frame with stamps. It is advantageous to use these stamps as toggle levers 71, 72; 81, 82 form and arrange each pair of bars in a frame.
  • the toggle lever drive allows the required straightening forces to be applied without difficulty, which can be greater than the supporting forces for the bent strand section, because the strand is in any case already largely solidified in the region of the straightening device.
  • the tools of the straightening device and their drives which do not need to differ from those already described, can, if necessary, be dimensioned or designed to be stronger.
  • Cooling the strand which is a problem that cannot be solved satisfactorily in the case of roller guides provided with rollers, is a difficult task.
  • the heat is extracted extensively and therefore gently, but it is not possible to change the cooling in the longitudinal direction of the strand.
  • the continuous casting process can also be used for steels in which, due to their composition-related sensitivity to inadequately adapted heat removal, it has not previously been considered.
  • the strand can be cooled uniformly at any point in a previously manageable manner, at least by means of the z. B. cooled crossbeams, where appropriate, in particular in the entrance area of the continuous sheet, cooling with the aid of sprayed-on coolant can also occur.

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  • Continuous Casting (AREA)

Claims (12)

1. Installation de coulée continue, en particulier pour la production de brames, équipée d'une lingotière (1) en continu, refroidissable, d'un support de brin, rectiligne ou courbe, destiné au transport, au refroidissement et, le cas échéant, à la dérivation du brin, lequel support présente une cage de guidage (6), dans laquelle sont aménagées deux séries opposées de longerons déployés, dont, au moyen d'un dispositif moteur, chaque organe peut être périodiquement serré contre le brin (5), déplacé sur un parcours pré-déterminé, écarté du brin et revenir à sa position de départ, le cycle de manoeuvre des longerons déployés appartenant à un groupe étant décalé d'environ une demi-période de temps par rapport au cycle de manoeuvre des longerons déployés appartenant à l'autre groupe de chaque série et, dans le cas d'un support courbe du brin, équipé d'un dispositif redresseur raccordé à ce groupe, avec des mécanismes redresseurs à commande morrice, disposés dans la cage et destinés au redressement rectiligne du brin et tous les longerons mobiles se présentant sous la forme de longerons transverses (7, 8, 100) perpendiculaires au plan longitudinal du brin (5) et opposés paire par paire par rapport au brin, se caractérisant en ce que chaque longeron transverse est relié à l'une des extrémités d'au moins un étançon (70, 80; 111) et vient s'appuyer via le ou les étançons sur la cage de guidage (6), en ce que les étançons peuvent être commandés par moteur pour le serrage ou l'écartement ainsi que pour la manoeuvre de transport et de retour du longeron transverse et en ce que, en ordre préférentiel, les mécanismes du dispositif redresseur sont constitués de longerons transverses (7, 8) venant s'appuyer avec les étançons sur la cage ou un bâti dudit mécanisme et pouvant être serrés contre ou écartés du brin à l'aide des étançons.
2. Installation conforme à la revendication 1 se caractérisant en ce que les deux longerons transverses (7, 8; 100) d'une paire de longerons transverses ou de plusieurs paires successives de ceux-ci du support de brin et/ou du dispositif redresseur avec tous les étançons (70, 80; 111) sont disposés dans un châssis commun (9) et reliés α-tec celui-ci pour en faire une unité fixable, mais avec manoeuvre d'écartement possible, sur la cage de guidage ou le bâti du mécanisme et en ce que, en ordre préférentiel, toutes les unités comportant le même nombre de paires de longerons transverses sont identiques entre elles (fig. 2).
3. Installation conforme à la revendication 1 ou 2 se caractérisant en ce que le longeron transverse (7 ou 8) est maintenu par un seul étançon (70 ou 80), qui s'étend essentiellement sur toute la longueur de longeron (fig. 2 et 3).
4. Installation conforme à une des revendications 1 à 3 se caractérisant en ce que c'est à tout le moins le longeron transverse le plus proche de la lingotière qui peut être indivituellement commandé par moteur.
5. Installation conforme à une des revendications 1 à 4 se caractérisant en ce que un nombre de longerons transverses successifs peut être conjointement commandé par moteur, en particulier en ce que deux séries voisines ou trois séries successives sont rassemblées en un seul groupe commandable par moteur, dans lequel groupe un longeron transverse est directement commandé par moteur et que sur celui-ci sont couplés les autres destinés à suivre ce même mouvement d'entrainement par moteur (fig. 5).
6. Installation conforme à une des revendications 1 à 5 se caractérisant en ce que tous les étançons (70, 80) soutenant un longeron transverse (7, 8) sont constitués sous la forme de leviers, dont une des extrémités est fixée au longeron transverse, y avantageusement articulés et dont les autres extrémités sont fixées (fig. 3) à la cage de guidage ou au châssis avec possibilité d'articulation.
7. Installation conforme à la revendication 6 se caractérisant en ce que un point d'articulation de levier (70, 80; 111) ou le levier tout au moins d'un longeron transverse de quelques-unes ou de préférence toutefois de toutes les parois de longerons transverses est disposé sur un axe lesté d'une force et pouvant coulisser à l'encontre de cette force et en particulier fixé sur la tige du piston (113) d'un cylindre hydraulique (93; 112) ou similaire.
8. Installation conforme à la revendication 6 ou 7 se caractérisant en ce que le ou les leviers étayant un longeron transverse (7, 8; 100) sont constitués sous la forme de leviers coudés (70, 80) et en ce que les deux bras de levier (71, 72 ou 81, 82) d'au moins un levier coudé sont commandables par moteur, en ce que le bras de levier coudé du côté du longeron (71) à proximité du point d'articulation sur le longeron transverse (7) et l'autre bras de levier (72) à proximité de l'articulation coudée (77) présentent chacun un guidage à coulisses (79 ou 78) et en ce que dans chaque rainure coulissante le tenon de chaque fois un arbre coudé mobile fixement posé (79', 78') vient s'engrener.
9. Installation conforme à la revendication 6 ou 7 se caractérisant en ce que le ou les leviers soutenant un longeron transverse (7) prenne(nt) la forme d'un levier articulé (111) et en ce que pour le moins un levier articulé est commandable pour un mouvement de va-et-vient, p. ex. est muni d'une guidage à coulisses (111) pour un tenon d'un arbre coudé mobile fixement posé (117) et en ce que l'extrémité du levier articulé au brin (5) est, en ordre préférentiel, déplaçable au moyen d'un cylindre de poussée (112) pour le serrer contre le brin ou pour l'en écarter.
10. Installation conforme à l'une des revendications 6 à 9 se caractérisant en ce que sur l'extrémité se trouvant du côté du brin de tous les leviers soutenant un longeron transverse il a été prévu un poche (73), ce qui est également le cas sur le longeron transverse (7) pour un cylindre touchant celle-ci en surface, en particulier un cylindre creux (74) refroidissable à sa face interne.
11. Installation conforme à une des revendications 1 à 10 se caractérisant en ce que le longeron transverse (100) présente un certain nombre d'alvéoles (101) délimitées par des parois verticales (102), qui à leur face frontale orientée vers le brin et à leur face arrière sont ou ouvertes ou recouvertes d'une paroi arrière (103), qui est équipée d'une ouverture livrant passage (104) et en ce que sur la face arrière des longerons ou a disposé des gicleurs (105) pour l'arrosage du brin au travers des alvéoles (fig. 9, 10).
12. Installation conforme à l'une des revendications 1 à 11 avec un brin froid se composant d'un certain nombre d'organes articulés entre eux, se caractérisant en ce que les organes sont constitués de barres transversales (132) présentant à peu près la même largeur que les longerons transverses (7, 8), en ce que ces barres transversales présentent à l'une des extrémités ou aux deux une section (136) pourvue d'un profilage longitudinal et en ce que sur le support du brin d'un côté ou des deux le long d'un épaulement (137) il se forme un profilage complémentaire au profilage des sections de barre.
EP19800890036 1979-04-20 1980-03-20 Dispositif de coulée continue, notamment pour la fabrication de brames Expired EP0018350B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3000/79 1979-04-20
AT300079A AT360691B (de) 1979-04-20 1979-04-20 Stranggiessanlage, insbesondere zum herstellen von brammen

Publications (2)

Publication Number Publication Date
EP0018350A1 EP0018350A1 (fr) 1980-10-29
EP0018350B1 true EP0018350B1 (fr) 1983-07-27

Family

ID=3543750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800890036 Expired EP0018350B1 (fr) 1979-04-20 1980-03-20 Dispositif de coulée continue, notamment pour la fabrication de brames

Country Status (5)

Country Link
EP (1) EP0018350B1 (fr)
JP (1) JPS55141368A (fr)
AT (1) AT360691B (fr)
CA (1) CA1150476A (fr)
DE (1) DE3064359D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2534166A1 (fr) * 1982-10-08 1984-04-13 Clecim Sa Installation de coulee continue de l'acier
US4975793A (en) * 1987-02-26 1990-12-04 Mitsubishi Denki Kabushiki Kaisha Tape loading mechanism for causing a length of tape to travel along a rotary head drum
CN113083906B (zh) * 2021-02-22 2022-06-14 阳春新钢铁有限责任公司 一种减少螺纹钢检废的生产控制方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2017976A1 (en) * 1970-04-15 1971-10-28 Schloemann AG, 4000 Düsseldorf Cooling plates for continuous casting plant
DE2046645B2 (de) * 1970-09-16 1971-09-16 Mannesmann AG, 4000 Dusseldorf Vorrichtung zum fuehren und stuetzen von in fluessigkeitsge kuehlten kokillen erzeugten straengen
SU327742A1 (ru) * 1971-02-15 1977-11-05 Ново-Тульский Металлургический Завод Способ выт гивани слитков различных профилей из кристаллизаторов при непрерывной разливке сталей и сплавов

Also Published As

Publication number Publication date
CA1150476A (fr) 1983-07-26
ATA300079A (de) 1980-06-15
JPS55141368A (en) 1980-11-05
JPS644869B2 (fr) 1989-01-27
AT360691B (de) 1981-01-26
EP0018350A1 (fr) 1980-10-29
DE3064359D1 (en) 1983-09-01

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