EP0467877A2 - Guidage de barre sur une installation de coulée continue - Google Patents

Guidage de barre sur une installation de coulée continue Download PDF

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Publication number
EP0467877A2
EP0467877A2 EP91890150A EP91890150A EP0467877A2 EP 0467877 A2 EP0467877 A2 EP 0467877A2 EP 91890150 A EP91890150 A EP 91890150A EP 91890150 A EP91890150 A EP 91890150A EP 0467877 A2 EP0467877 A2 EP 0467877A2
Authority
EP
European Patent Office
Prior art keywords
support
strand guide
counter
disks
guide 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
EP91890150A
Other languages
German (de)
English (en)
Other versions
EP0467877A3 (en
EP0467877B1 (fr
Inventor
Armin Dipl.-Ing. Schertler
Josef Anton Ortner
Werner Scheurecker
Kurt Engel
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19904022894 external-priority patent/DE4022894A1/de
Priority claimed from DE19904022871 external-priority patent/DE4022871A1/de
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0467877A2 publication Critical patent/EP0467877A2/fr
Publication of EP0467877A3 publication Critical patent/EP0467877A3/de
Application granted granted Critical
Publication of EP0467877B1 publication Critical patent/EP0467877B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing

Definitions

  • the invention relates to a strand guide on a continuous caster, with mutually opposite strand guide roller-bearing frame parts, of which at least one can be displaced along a guide device by means of a displacement device with enlargement or reduction of the distance between the opposing strand guide rollers, the frame parts using the displacement device against one another until they are in contact with one another
  • Support devices can be tensioned on counter support devices which are provided with support surfaces located at different heights and with counter support surfaces.
  • a strand guide of this type is known from DE-C 1 963 146.
  • the support device is designed here as a bushing which has support surfaces arranged in steps at different heights.
  • the bushing can be rotated about its axis, so that one of the support surfaces can come into engagement with a counter support surface of a counter support device, whereby the support device can be brought into different distances from the counter support device and thus different distances between the opposing strand guide rollers can be defined.
  • the disadvantage here is that only very specific strand thicknesses can be cast, the number of different strand thicknesses being predetermined by the number of supporting and counter-supporting surfaces.
  • Another disadvantage is that with the known strand guide an exact adaptation to the desired strand format is not possible; in particular, it is not possible to adjust the distances between the opposing rolls of the strand guide in accordance with the shrinkage of the strand over the length of the To vary the strand guide, ie to arrange the roller conveyors of the strand guides lying one above the other in a wedge shape over the longitudinal extent of the strand guide.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to provide a strand guide of the type described above, in which the roller spacings of opposite strand guide rollers can be adjusted as desired, so that one can speak practically of a stepless adjustment of the roller spacing.
  • the strand guide should nevertheless have a construction which is simple to manufacture and maintain, and which, despite the rough continuous casting operation, has only a low susceptibility to repairs.
  • the abutment is also advantageously formed by a bush having a helical support surface which is non-rotatable and rests with its support surface on the support surface of the rotatable bush.
  • the tie rods are expediently designed as pressure medium cylinders, the cylinders of which are each articulated to one of the frame parts and the piston rods of which are each articulated to the opposite frame part, and the support and counter support devices are penetrated by the piston rod of the pressure medium cylinders.
  • a guide device is advantageously provided on one of the frame parts, on which the other frame part is guided laterally, ie perpendicular to the direction of displacement, the guide device, however, pivoting movements of the frame parts relative to one another about the rollers parallel axis allows.
  • a preferred embodiment is characterized in that the guide device is formed by a guide column, which is rigidly arranged on one of the scaffold parts, with laterally projecting spherical support surfaces are provided on the guide column, on which guide surfaces of the second scaffold part rest, advantageously the spherical support surfaces being cylindrical are trained.
  • the rotatable bushings provided on the pressure medium cylinders arranged in the longitudinal direction of the strand guide are advantageously actuated synchronously and independently of the rotatable bushes provided on the pressure medium cylinders arranged in the longitudinal direction of the strand guide.
  • a wide range of setting a roller spacing despite the use of a rotatable bush with a low inclination helical support surface can be achieved in that each support and Counter support device extensions or recesses are provided in several height levels.
  • a simple maintenance or a simple exchange of the device for setting a roller spacing can be achieved if a support and counter support device with a rotatable bush and its abutment forms a unit that can be pushed onto the tie rod.
  • each unit is advantageously surrounded on the outside by a protective device designed as a telescopic cylinder.
  • the helical support surface of the rotatable sleeve expediently has an angle of inclination smaller than the friction angle associated with the friction prevailing between it and the abutment.
  • a strand guide is to be created in which the adjustment process for adjusting the distance between the opposing strand guide rollers can be carried out very easily and, despite the restricted space, relatively large support and counter support surfaces with a very small design of the support and counter support devices are available stand.
  • the actuator for adjusting the support and counter support surfaces should be kept as small as possible.
  • a pressure medium cylinder of the simplest type can be provided as the rotary drive for each support disk.
  • About half of the annular area occupied by the support disks or counter support disks is available both for the support and counter support surfaces for receiving the clamping force pressing the frame parts against one another.
  • the cross-sectional areas of the recesses of each support disk and the cross-sectional areas of the extensions of the counter support disk can be chosen as small as desired - at least what theirs Expansion in the circumferential direction affects - a relatively small angular movement of the support disks is sufficient to change the distance between the opposing strand guide rollers. In other words, this means that the drive device for carrying out the rotary movement of the support disks can also be kept small.
  • the length of the extensions of the counter support disks is advantageously dimensioned by a game greater than the sum of the thicknesses of the support disks aligned in a stack.
  • guide strips are expediently arranged on the outer circumference of the support disks parallel to the central axis of the support disks and extending over the height of the support disks aligned to form a stack, and have the support disks to limit them their rotational movement, which interact with the guide rails.
  • Pressure medium cylinders are advantageously provided for rotating the support disks, specifically a separate pressure medium cylinder for each of the support disks lying one above the other.
  • the support disks are provided on the outside with an annular groove, into each of which a circumferential web of the support disk arranged above or below extends.
  • the guide strips are advantageously connected at the ends facing the uppermost support disk to a circumferential annular bead which engages over the top support disk.
  • the support and counter support disks are preferably arranged centrally to a tie rod connecting the opposite frame parts.
  • a control valve is expediently provided to control the pressure medium cylinders of the support disks arranged one above the other in a stack, which controls the pressure medium cylinders in such a way that the extensions of the counter support disks are each stacked on top of one another Support the full material of the support washers.
  • FIG. 1 shows a side view of the strand guide frame in the direction of the strand axis and partially in section
  • FIG. 2 shows a view from above partially along line II-II of FIG. 1 of this strand guide frame demonstrate.
  • Fig. 3 shows a side view in the direction of arrow III of Fig. 1.
  • FIG. 4 shows, in a manner analogous to FIG. 4, a second embodiment in a schematic representation.
  • Fig. 6 shows a side view of a strand guide in the direction of the strand axis and partially cut according to a further embodiment and FIG.
  • FIG. 7 is a view from above, also partially cut, of this strand guide frame.
  • Fig. 8 shows a detail of Fig. 7 and
  • Fig. 9 shows a detail of Fig. 6 on an enlarged scale;
  • FIGS. 10, 11, 12 and 13 illustrate a control for the strand guiding scaffold and its mode of operation in a schematic representation, wherein FIGS. 10 to 13 each correspond to different distance settings of the opposing strand guiding rollers.
  • 1 is a strand with a slab cross-section - it could also be a strand with a bloom or billet cross-section, which is guided and supported between mutually opposite strand guide rollers 2, 3.
  • the strand guide rollers 2 supporting the strand 1 on the outside or underside 4 are mounted on longitudinal beams 5 on two cross beams 6, which are supported on the foundation.
  • This, made up of the longitudinal 5 and cross members 6 fixed scaffold part 7, is opposite a movable in the direction of the thickness 8 and thus the roller spacing of the rollers 2 and 3 of the strand 1 scaffold part 9, which is also composed of longitudinal 10 and cross members 11 .
  • the scaffold part 9, which is displaceable relative to the stationary scaffold part 7, is guided on guide columns 14 rigidly mounted laterally on the strand guide tracks 12, 13 formed by the strand guide rollers 2 and 3 on the stationary scaffold part 7, specifically in the longitudinal direction of the strand guide tracks via two on each of the guide columns 14 at the same height , but arranged on opposite sides of the guide columns 14, crowned, preferably cylindrically shaped support surfaces 15, against which rigidly arranged side walls with guide surfaces 16 rest on the displaceable frame part 9.
  • These cylinder support surfaces 15 each have a radius R which corresponds to half their distance, as a result of which the displaceable frame part 9 relative to the stationary frame part 7 about the common axis A of these support surfaces 15, which axis A extends parallel to the rollers 2, 3 , is pivotable.
  • guide strips 17 are arranged on each stationary guide column 14, which protrude into a groove-shaped recess 18 of the displaceable scaffold part 9 with lateral play 19.
  • the scaffold parts 7, 9, which are rectangular in plan, are connected to each other at the corner points via a pressure medium cylinder 20 and can be adjusted with respect to one another and clamped against one another with the aid of these pressure medium cylinders.
  • Each support device 26 is formed by an annular bush 28, which is arranged concentrically around the piston rod and is mounted on the cover plate 23 in a stationary manner and, on its side facing the counter support device 27, is provided with sector-shaped extensions 29 which are directed towards the counter support device 27 and are evenly distributed around the circumference is. Sector-shaped gaps 30, which are somewhat wider than the extensions 29, are provided between the extensions 29.
  • the counter support devices 27 are also formed by bushes 31 arranged concentrically to the piston rods 22, which are configured opposite to the support devices 26, i.e. are provided with extensions 32 turned towards the support devices 26, which can either be inserted between the extensions 29 into the gaps 30 of the support devices 26 until the end faces 33 of the extensions 32 abut the bottom of the recesses 30 or with their end faces 33 on the end faces 34 of the Extensions 29 of the support devices 26 can be placed.
  • the counter support devices 27 can be rotated about the piston rods 22, two counter support devices 27, which are arranged on one side of the strand guideways 12, 13, by means of a common pressure medium cylinder 35, the housing 36 of which on one extension 37 of one of the counter support devices 27 and the latter Piston rod 38 is articulated on an extension 37 of the second counter support device 27, are rotatable. Stops not shown provide suitable end positions of the rotary movement of the counter support devices 27, so that in a rotary position the extensions 29, 32 of the support and counter support devices 26, 27 are exactly opposite one another and in a second rotary position Extensions 32 of the counter support device 27 come to lie exactly between the extensions 29 of the support devices 26, as a result of which two different distances 8 between the rollers 2 and 3 can be set.
  • the counter support devices 27 are each arranged on a stepped sleeve 39 pushed onto the piston rod 22 of the pressure medium cylinder 20 and movable therewith and are supported on a step 40 of this stepped sleeve 39.
  • the counter support device 27 is lifted off the support device 26, as shown in FIG. 4.
  • the support 26 and counter support devices 27 are each protected by a telescopic cylinder 41 arranged on the outside.
  • a device 42 for fine adjustment of the roller spacing 8 of the opposing roller tracks 12, 13 is arranged, which devices 42 are thus provided in series with the support 26 and counter support devices 27. These devices 42 permit a height adjustment of the displaceable scaffold part 9 in relation to the stationary scaffold part 7 to the extent of approximately the height of the extensions 29, 32 of the support 26 and counter support devices 27 or also less.
  • These devices 42 are each formed by two bushes 43, 44, which abut one another with corresponding helical sliding surfaces 45, 46.
  • One of the sleeves 43, 44 is mounted in a stationary, ie non-rotatable, position relative to the piston rod 22 of the pressure medium cylinder 20.
  • the second, opposite bush 43 can be rotated about the piston rod with the aid of an adjusting device 47, such as a Raco device, which allows the setting of a predetermined rotation angle, two bushes 43 arranged at the same height of the longitudinal extension of the strand guideways 12, 13 helical sliding surface 45 can be rotated together by an actuator 47 via push rods 48.
  • the displaceable scaffold part 9 can be pivoted about the axis A of the spherical support surfaces 15. It is therefore possible, with the aid of the device 42, not only to move the displaceable scaffolding part 9 almost continuously - parallel to one another, depending on the minimum setting step of the Raco device and the height difference resulting from the angle of inclination of the helical support surface 45, but also that of the Roll the displaceable scaffold part formed roller track 13 to the opposite roller track 12, which is formed by the rollers 2 on the rigidly arranged scaffold part 7, wedge-shaped, so that a shrinkage of the strand 1 in the thickness direction can be taken into account.
  • the two sleeves 43, 44 with helical sliding surfaces 45, 46 are also surrounded on the outside by a telescopic cylinder 49 in order to prevent the ingress of contaminants between the sleeves 43, 44.
  • the angle of inclination of the helical sliding surfaces 45, 46 is preferably smaller than the associated friction angle, so that the actuating device 47 is not acted upon by forces originating from the strand 1 or from the pressure medium cylinder 20.
  • a differently designed abutment on which the helical support surface 45 is supported could also be provided.
  • the support 26 and counter support device 27 is combined with the device 42 arranged in series to form a structural unit which can be pulled off and pushed onto the piston rod 22 of the pressure medium cylinder 20 in a simple manner and as a whole, thereby making it easy to repair or maintenance and servicing result.
  • support 26 'and counter support devices 27' are present twice on each pressure medium cylinder 20, namely in series one behind the other.
  • the support device 26 ' has counter support surfaces 50 in three different planes 51, 52, 53, on which the end faces 33' of the extensions 32 'of the extensions 32' of the counter support device 27 'are selectively supported.
  • the actuators 54 provided for rotating the counter-support devices 27 ' must allow the counter-support devices 27' to be rotated by a predetermined angle.
  • each cover plate 23 of a housing 24 enclosing the cylinder part 21 of the pressure medium cylinder and a plate 55 opposite this cover plate 23, which is connected to the end of the piston rod 22 or to the displaceable frame part 9 in an articulated manner
  • a support 56 and counter support device 57 is arranged, which makes it possible to position the displaceable scaffold part 9 in several precisely defined distances from the stationary scaffold part 7, so that the distance 25 between the opposing strand guide tracks 12, 13 and thus the thickness of the cast part Strand 1 is variable.
  • Each support device 56 is formed by three support disks 58, 59, 60 arranged concentrically one above the other, which are pushed onto a bush 61 surrounding the piston rod 22.
  • the support disks 58, 59, 60 have recesses 63 which are located centrally to their central axis 62 and which, in the exemplary embodiment shown, are designed as segment-shaped through holes.
  • the support disks 58, 59, 60 can be rotated with respect to one another, with a separate pressure medium cylinder 64, for performing the rotary movement for each of the support disks 58, 59, 60. 65, 66 is provided.
  • Each of these pressure medium cylinders 64, 65, 66 engages one of the support disks on a radial extension 67 and is counter-supported on the cover plate 23. With the aid of these pressure medium cylinders, the support disks 58, 59, 60 can be rotated, as will be explained in more detail later with reference to FIGS. 10 to 13.
  • each of the support disks 58, 59, 60 is provided on the outside with a collar 68 which projects in a circumferential groove 69 of the support disk or cover plate 23 arranged below it, so that protection is provided to the outside given is.
  • the support disks themselves are provided with a coating 70 to reduce the friction.
  • laterally projecting guide strips 71 are provided on the cover plate 23, which protrude as far as the uppermost support disk 58 and are evenly distributed over their circumference.
  • an annular bead 72 which overlaps the uppermost support disk 58, is mounted, so that the support disks 58, 59, 60 are held together.
  • a counter support disk 76 is arranged, which can be raised and lowered with the upper scaffolding part 9, namely by taking it with the sleeve 61, on which it can be supported on a shoulder 77.
  • Each of these counter support disks 76 has extensions 78 which extend in the direction of their central axis and which have a cross section which corresponds to the cross section of the recesses 63 of the support disks 58, 59, 60 but is reduced by a slight lateral play 79 exhibit. These extensions 78 can be inserted into the recesses of the support disks when these recesses 63 are rotated into positions aligned with the extensions 78.
  • the length 80 of the extensions 78 is larger than the sum of the thicknesses of the support disks 58, 59, 60 lying one above the other.
  • each counter support disk 76 is surrounded on the outside by a telescopic cylinder 83, so that the ingress of contaminants to the support 56 and counter support devices 57 is prevented.
  • three support disks 58, 59, 60 are provided, resulting in a total of four different distance settings of the support rollers 2, 3 lying opposite one another.
  • the number of support disks can be selected according to requirements.
  • a control valve 86 is provided, which controls the pressure medium cylinders 64, 65, 66 in such a way that the extensions 78 of each counter support disk 76 always rest on top of each other, stacked solid material of the support disks 58, 59.
  • This control valve 86 consists of an elongated cylinder housing 87, in the interior of which a double piston 88 is provided, the pistons 89 of which are connected to one another by a rod 90.
  • a pressure medium drain line 91 is connected to one end of the cylinder housing 87;
  • An inlet line 92 for the pressure medium is provided in the middle of the longitudinal extent of the cylinder housing.
  • the two pistons 89 are arranged at a distance that is slightly larger than the respective distance between the discharge line 91 and the inlet line 92.
  • the pressure medium cylinders 64, 65, 66 are supplied via six connection lines 93, 94, of which three connection lines 93, each of which opens at one end of the pressure medium cylinders 64, 65, 66, between the first outlet line 91 and the central inlet line 92 into the cylinder housing 87 flow into and three more Connection lines 94, which each open into the other end of the pressure medium cylinders 64, 65, 66, open into the cylinder housing between the second outlet line 91 and the central inlet line 92.
  • the two pistons 89 which can be displaced in the cylinder housing 87 have a thickness which is less than the distance between the openings of the individual connecting lines 93, 94.
  • the inlet line 92 is always in the space enclosed by the pistons 89.
  • the double piston 88 can be controlled manually or electronically from the control station of the continuous casting installation.
  • the pressure medium cylinders 64, 65, 66 can only be supplied with pressure medium in such a way that the extensions 78 are always only on the cover plate 23 from the support disks 58, 59, 60 formed solid material rest, so that deformation of the support disks 58, 59 is avoided by the pressure medium applied by the pressure medium cylinders 17 via the extensions 78.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Devices For Molds (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Aerials With Secondary Devices (AREA)
  • Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP91890150A 1990-07-18 1991-07-11 Guidage de barre sur une installation de coulée continue Expired - Lifetime EP0467877B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4022871 1990-07-18
DE19904022894 DE4022894A1 (de) 1990-07-18 1990-07-18 Strangfuehrung an einer stranggiessanlage
DE19904022871 DE4022871A1 (de) 1990-07-18 1990-07-18 Strangfuehrung an einer stranggiessanlage
DE4022894 1990-07-18

Publications (3)

Publication Number Publication Date
EP0467877A2 true EP0467877A2 (fr) 1992-01-22
EP0467877A3 EP0467877A3 (en) 1992-02-26
EP0467877B1 EP0467877B1 (fr) 1994-12-14

Family

ID=25895140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890150A Expired - Lifetime EP0467877B1 (fr) 1990-07-18 1991-07-11 Guidage de barre sur une installation de coulée continue

Country Status (5)

Country Link
US (1) US5115857A (fr)
EP (1) EP0467877B1 (fr)
JP (1) JPH04231155A (fr)
AT (1) ATE115448T1 (fr)
DE (1) DE59103863D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040271A1 (de) 2000-08-17 2002-02-28 Sms Demag Ag Vorrichtung zum Stranggießen von Metallen, insbesondere von Stahl
BR112014016984B1 (pt) * 2012-01-12 2020-05-12 Nippon Steel & Sumikin Engineering Co., Ltd. Dispositivo de redução de peça fundida
DE102017219740A1 (de) 2017-11-07 2019-05-09 Sms Group Gmbh Strangführungssegment und Stranggießanlage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2612094A1 (de) * 1975-03-25 1976-10-14 Voest Ag Strangfuehrung an einer stranggiessanlage
DE3212414A1 (de) * 1981-04-22 1982-11-11 Voest-Alpine AG, 4010 Linz Strangfuehrungsgeruest fuer eine stranggiessanlage
EP0194656A1 (fr) * 1985-03-12 1986-09-17 MANNESMANN Aktiengesellschaft Dispositif pour la coulée continue de métal, en particulier d'acier

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT344346B (de) * 1975-04-30 1978-07-10 Voest Ag Einrichtung zum fuehren eines gussstranges
AT343303B (de) * 1975-10-01 1978-05-26 Voest Ag Stutz- und fuhrungsbogen fur gussstrange, insbesondere fur brammengussstrange
AT341698B (de) * 1975-10-16 1978-02-27 Voest Ag Stutz- und fuhrungsbogen fur gussstrange, insbesondere fur brammengussstrange
AT340082B (de) * 1975-10-29 1977-11-25 Voest Ag Strangfuhrung an einer stranggiessanlage
AT361649B (de) * 1979-06-28 1981-03-25 Voest Alpine Ag Stuetz- und fuehrungsgeruest fuer stranggiess- anlagen
AT368049B (de) * 1979-11-28 1982-08-25 Voest Alpine Ag Einrichtung an einem stuetz- und fuehrungsgeruest fuer eine stranggiessanlage
DE3829549A1 (de) * 1988-08-31 1990-03-08 Voest Alpine Ind Anlagen Strangfuehrungsgeruest fuer eine stranggiessanlage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2612094A1 (de) * 1975-03-25 1976-10-14 Voest Ag Strangfuehrung an einer stranggiessanlage
DE3212414A1 (de) * 1981-04-22 1982-11-11 Voest-Alpine AG, 4010 Linz Strangfuehrungsgeruest fuer eine stranggiessanlage
EP0194656A1 (fr) * 1985-03-12 1986-09-17 MANNESMANN Aktiengesellschaft Dispositif pour la coulée continue de métal, en particulier d'acier

Also Published As

Publication number Publication date
US5115857A (en) 1992-05-26
EP0467877A3 (en) 1992-02-26
JPH04231155A (ja) 1992-08-20
ATE115448T1 (de) 1994-12-15
EP0467877B1 (fr) 1994-12-14
DE59103863D1 (de) 1995-02-02

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