EP2257397A1 - Strand guide segment - Google Patents
Strand guide segmentInfo
- Publication number
- EP2257397A1 EP2257397A1 EP09724438A EP09724438A EP2257397A1 EP 2257397 A1 EP2257397 A1 EP 2257397A1 EP 09724438 A EP09724438 A EP 09724438A EP 09724438 A EP09724438 A EP 09724438A EP 2257397 A1 EP2257397 A1 EP 2257397A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strand guide
- cross member
- strand
- guide roller
- longitudinal slot
- 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
Links
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
-
- 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
- B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
Definitions
- the invention relates to a strand guide segment for supporting and guiding a cast metal strand in a strand guide of a continuous casting with a plurality of strand guide rollers, which are supported in a segment frame of the strand guide segment on cross members.
- the invention relates to a strand guide segment for supporting and guiding a cast steel strand.
- a thin slab or a strip - strand guide rollers arranged individually or in strand guide segments.
- adjustable and drivable strand guide rollers are provided at intervals from one another on the cast strand and at the start of casting on the starter strand.
- a strand guide segment of the type described above is already known from WO 01/94051 A1. It comprises two rows of strand guide rollers supported on cross beams, the cross beams being arranged in successive segment frames.
- a strand guide rollers supporting cross member is guided on vertical guides in the segment frame movable and can be made to the cast strand or the Anfahrstrang.
- the necessary contact force is applied by a clamping device designed as a pressure cylinder, which acts centrally on the cross member. The central contact force causes a deflection of the arc inside cross member and the strand guide rollers supported thereon.
- a desired convex (crowned) cross-sectional shape of the cast strand is achieved when the outer arch portion and the inner arch portion of a segment are braced by acting on the four segment corners clamping cylinders.
- a similar deformation pattern is achieved in a cross member with employed strand guide rollers when two adjusting devices engage in each case in the end regions of the cross member thereto.
- Such an embodiment is already known from WO 2006/037555 A1.
- this embodiment has the disadvantage that two synchronously operating pressure medium cylinder must be provided.
- the object of the present invention is to avoid the disadvantages of the known prior art and to propose a strand guide segment with at least one strand guide rollers supporting cross member of the type described above, in which always a convex in cross-section of the cast strand (spherical) cross-sectional shape is ensured.
- This object is achieved on the basis of a strand guide segment of the type described above in that at least one of the cross member is plate-shaped and has a parallel to the longitudinal extent of the strand guide rollers aligned longitudinal slot.
- a particularly advantageous embodiment is that at least one cross member supporting a strand guide roller is slidably formed in the segment frame normal to the direction of longitudinal extension of the strand guide roller, this displaceable cross member is connected via at least one Anstellinraum with the segment frame and the displaceable cross member is plate-shaped and a parallel to Has longitudinal extension of the strand guide roller aligned longitudinal slot.
- the segment tension of the four clamping cylinders arranged on the segment corners results in a convex deformation of the stationary cross members and thus in a desired biconvex shape of the cast strand.
- engageable cross member of the same design would result from the centric introduction of the adjusting force a counter-concave deformation of the cross member and thus the driven strand guide rollers.
- the resulting within a segment different deformation of the strand shells could lead to problems with the slab quality.
- the longitudinal slot in the cross member between a pivot joint for the articulation of the adjusting device on the cross member and the strand guide roller is arranged.
- the longitudinal slot in the cross member has a slot length which is less than one of the coaxial and arranged on this cross member supported strand guide roller formed support length.
- a support length of the strand guide roller here is the distance between the two outer side faces of the arranged on the movable cross member strand guide roller to understand.
- the longitudinal slot in the cross member has a slot length which is less than one of the coaxially arranged and supported on this cross member strand guide roller and reduced by half the length of the edge strand guide roller sections support length.
- This strand guide roller comprises a plurality of strand guide roller sections which extend between adjacent bearing points in the case of a multi-layered roller
- several rollers which are mounted independently of each other on a crossbeam and axially aligned fall under the term "1". strand guiding role ".
- the longitudinal slot extends in the cross member between two aligned normal to the longitudinal extent of the strand guide roller guides.
- the longitudinal slot in the cross member has a slot length which is greater than one third of the coaxially arranged and supported on this cross member strand guide roller support length.
- the connecting device connecting the cross member to the segment frame has a force application line of force which divides the slot length of the longitudinal slot in the cross member and the support length formed by the strand guide roller in the middle.
- a symmetrical to the center line bending line is achieved.
- the longitudinal slot in the cross member has expansion areas at its ends, edge cracking in this area is certainly avoided.
- These end-side expansion areas are circular.
- the diameter of the circular extension regions is equal to or greater than the slot width of the longitudinal slot.
- the circular widening region thus comprises end sections of the longitudinal slot which terminate in semicircular fillets or circular widenings which terminate the longitudinal slot.
- the extension areas may also differ slightly from the circular shape. They allow a voltage optimization in the sense of avoiding voltage spikes regardless of the slot width and surface finish of the slot.
- FIG. 1 is an axonometric view of a strand guide segment with an engageable and strand guide rollers bearing cross member, Fig. 2 arranged in the inner arc segment frame displaceable cross member in a partial section of Figure 1,
- Fig. 3 is a front view of the cross member according to the invention
- Fig. 4a to 4c a comparative representation of the effects of the clamping forces and contact forces in the segment on the cross-sectional shape of the cast
- a cast strand with still liquid core and a thin strand shell is continuously formed in an oscillating cooled continuous casting mold.
- downstream strand guide with several meters radius of curvature of the casting strand is deflected under constant cooling of substantially vertical direction in the horizontal and directed straight there.
- a plurality of strand guide rollers which are arranged in two rows, form a transport channel for the cast strand, in which it is supported and guided.
- Some of the strand guide rollers are designed as driver rollers and provided with a motor drive to ensure a controlled conveying speed for the casting strand and at the start of casting for the starter strand.
- Casting successive strand guide rollers of both rows are summarized in assemblies in a strand guide segment.
- Such a continuous casting plant is known for example from EP 908 256 A1.
- the strand guide is composed of individual strand guide segments, as one is shown schematically in Fig. 1 in axonometric representation.
- Each strand guide segment comprises a segment frame 1 which is formed by an outer arc segment frame 2 a and an inner arc segment frame 2 b, which are interconnected by four hydraulically actuable bracing devices 3 a, 3 b, 3 c, 3 d arranged in the corner regions of the segment frame 1, which have a predetermined positioning of Allow inner arch segment frame 2b to the outer arch segment frame 2a.
- the bearing housings 6 mounted on successively arranged cross members 4 strand guide rollers 5 can be adjusted to the degree of strand thickness or casting start on the thickness of the Anfahrstranges.
- Each strand guide roller 5 is formed as a continuous, multi-bearing roller or a plurality of aligned rollers.
- the cross members 4 are fixedly secured in the inner bow segment frame 2 b or in the outer bow segment frame 2 a.
- Fig. 2 shows in a partial section of Fig. 1 arranged in a réellebogensegmentrahmen 2b sliding cross member 7, which carries a plurality of bearing housing 6 which receive a multi-bearing, coupled to a drive 9a strand guide roller 5a rotatably.
- a similar, driven strand guide roller 5b is arranged opposite in the outer arch segment frame 2a and in Fig. 1 by the drive 9b, which is opposite to the drive 9a, indicated.
- the driven strand guide roller 5b is supported in stationary cross beams 4 in the same way as the adjacent strand guide rollers 5 fastened in the outer arc segment frame 2a (FIG. 1).
- the provided for the driven strand guide roller 5a sliding roller carrier 7 is on the one hand via a pivot joint 1 1 connected to a controllable pressure medium cylinder Anstell shark 10 which is supported on the other hand via a pivot joint 12 on the inner arc segment frame 2b.
- the two pivot joints 11, 12 define a connecting line 13, which corresponds to the line of action of the force applied to the cast strand and coincides in Figure 2 with the central axis of the adjusting device 10.
- Parallel to the connecting lines 13, guides 15a, 16a are fastened on both sides to the displaceable cross member 7, which cooperate with corresponding counter guides 15b, 16b on the inner bow segment frame 2b.
- the guides 15a are arranged on the broad sides of the cross member 7, approximately at a distance of a half Strangschreibungsrollenabêt.es 5c, 5e from its side edges.
- the guides 16a bear against the end faces of the cross member 7.
- the guides 15a and counter guides 15b stabilize the cross member 7 in the casting direction G, the guides 16 and counter guides 16b in the transverse direction thereto.
- the cross member 7 has a longitudinal slot 20 which is parallel to the axis of rotation 14 of the driven strand guide roller 5a and extends between the two vertical guides 15a. The adjusting forces introduced with the adjusting device 10 in the cross member are redirected through the longitudinal slot and change the voltage conditions in the cross member.
- Figure 3 shows the movable or engageable on the cast strand cross member 7 with the mounted thereon bearing housings 6 and rotatably supported therein strand guide roller 5a, which is formed in several parts and three strand guide roller sections 5c, 5d, 5e.
- the movable cross member 7 is plate-shaped and carries a series of previously described vertical guides 15a, 16a. Between the mounted in the upper edge region and the center of the cross member 7 pivot joint 1 1 and the strand guide roller 5a of the cross member 7 is penetrated by a longitudinal slot 20 with a slot length L SCh .
- the slot length is shorter than the support length L S t, which is determined by the edge-side end faces of the strand guide roller sections 5 c, 5 e.
- the slot length L SCh is also less than the support length L S t formed by the strand guide roller 5 a and reduced by half the length of the edge-side strand guide roller sections 5 c, 5 e.
- the slot length Lsc h is also longer than one third of the support length L S t formed by the coaxially arranged strand guide roller. It extends in an area between the two vertical guides 15a.
- the longitudinal slot 20 in the cross member 7 merges at its two ends in circular extension regions 21, 21a.
- the diameter of these circular extension regions 21, 21 a is at least twice as large as the slit width B SCh -
- FIG. 3 shows two embodiments of the expansion region 21, 21 a.
- the extension portion 21 has a diameter larger than that Slot width B SCh -
- the extension portion 21 a has a diameter corresponding to the slot width B SCh .
- FIG. 3 embodiment of an engageable on the cast strand cross member is analogous to a non-adjustable cross member, which is rigidly fixed in an outer arc segment frame or inner arc segment frame applicable.
- FIG. 4a A comparative representation of the effects of the clamping forces and contact forces in a strand guide segment on the cross-sectional shape of the cast strand is shown in Figures 4a, 4b and 4c and illustrates the advantage of the solution according to the invention.
- FIG. 4a illustrates an inner-arc segment frame 2b which is braced with the outer-arc segment frame (not illustrated) via four bracing devices 3a, 3b, 3c, 3d arranged in the corner region.
- the tension forces F Sp applied by the tensioning devices are transmitted via the cross members 4 fixedly arranged in the segment frame to the strand guide rollers 5 and thus to the cast strand 30.
- This is a desired shape itself, through which a centered strand transport is ensured in the continuous casting ,
- a cross member 7 which can be raised against the cast strand 30 is loaded with the longitudinal slot 20 according to the invention with a central setting force F A. Since a power transmission via the longitudinal slot 20 is not possible, there is a deflection of the load to the edge regions of the cross member 7 and thus to the end regions of the strand guide roller 5a. The cast strand 30 is therefore much more heavily loaded in its lateral edge zones than in its central area. This also leads to a biconvex deformation image, as is analogous to the rigidly positioned cross members 4 in Figure 4a adjusts. The harmful changing deformation therefore no longer occurs in the inventive design of a strand guide segment.
- the longitudinal slot according to the invention can be arranged on any strand guide rollers carrying cross members both on the outer bow and on the inner bow of the strand guide. This possibility exists regardless of whether this cross member is rigidly anchored in a strand guide segment, as inner arc segment part is adjustable or designed as an individual component in the strand guide segment with a cross member associated Anstell issued adjustable.
- the strand guide segment can also comprise only one cross member carrying at least one strand guide roller.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0049208A AT506549B1 (en) | 2008-03-28 | 2008-03-28 | TRAIN TOUR SEGMENT |
PCT/EP2009/052099 WO2009118222A1 (en) | 2008-03-28 | 2009-02-23 | Strand guide segment |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2257397A1 true EP2257397A1 (en) | 2010-12-08 |
EP2257397B1 EP2257397B1 (en) | 2012-04-04 |
Family
ID=40602489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09724438A Not-in-force EP2257397B1 (en) | 2008-03-28 | 2009-02-23 | Strand guide segment |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2257397B1 (en) |
KR (1) | KR20100126846A (en) |
CN (1) | CN102083571A (en) |
AT (2) | AT506549B1 (en) |
WO (1) | WO2009118222A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010007659B4 (en) * | 2010-01-12 | 2019-05-09 | Sms Group Gmbh | Continuous casting machine with a dummy strand |
AT509352B1 (en) * | 2010-02-05 | 2014-06-15 | Siemens Vai Metals Tech Gmbh | ROAD GUIDE SEGMENT IN CASSETTE CONSTRUCTION WITH SINGLE ROLLING |
EP2404686A1 (en) * | 2010-07-09 | 2012-01-11 | Siemens VAI Metals Technologies GmbH | Roller holder for a line guide segment of a strand casting machine |
DE102011088127A1 (en) * | 2011-06-07 | 2012-12-13 | Sms Siemag Ag | Strand guide segment of a strand guide of a continuous casting plant and method for operating a strand guiding segment |
KR101372640B1 (en) * | 2011-12-27 | 2014-03-11 | 주식회사 포스코 | Seperatable Segment and Roll Changing Method Using It |
CN104057049B (en) * | 2014-07-09 | 2016-06-15 | 北京科技大学 | The continuous casting machine fan-shaped segment of the big pressure of continuous casting billet solidifying end and big reduction method thereof |
CN104057050B (en) * | 2014-07-14 | 2016-04-13 | 北京科技大学 | A kind of supporting construction of fan-shaped sections of slab continuous Continuous Casting Rolls |
AT516412B1 (en) * | 2014-10-28 | 2017-07-15 | Primetals Technologies Austria GmbH | Strand guide roller unit for a continuous casting machine |
CN108015244B (en) * | 2017-12-05 | 2023-11-14 | 马鞍山钢铁股份有限公司 | Sector section structure of continuous casting machine |
AT521416B1 (en) * | 2018-07-02 | 2024-01-15 | Primetals Technologies Austria GmbH | Strand guide segment with individually movable strand guide rollers |
CN110523938B (en) * | 2019-07-24 | 2021-10-01 | 中国一冶集团有限公司 | Wall surface fixing device for replacing guide rail of continuous casting machine and method for fixing replaced guide rail |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1101959A (en) * | 1965-07-20 | 1968-02-07 | Nat Res Dev | Improvements in and relating to load cells |
DE59912592D1 (en) * | 1998-03-09 | 2006-02-09 | Sms Demag Ag | Guide element of a continuous casting plant |
DE19916173A1 (en) * | 1999-04-10 | 2000-10-12 | Sms Demag Ag | Method and device for adjusting the slab profile of a continuously cast slab, in particular a thin slab |
AT3953U3 (en) | 2000-06-02 | 2001-04-25 | Voest Alpine Ind Anlagen | STRING GUIDING ELEMENT AND STRING GUIDING SEGMENT WITH INTEGRATED STRING GUIDING ELEMENT |
DE10040271A1 (en) * | 2000-08-17 | 2002-02-28 | Sms Demag Ag | Device for the continuous casting of metals, in particular steel |
AT409465B (en) * | 2000-12-12 | 2002-08-26 | Voest Alpine Ind Anlagen | METHOD FOR ADJUSTING A CASTING SPLIT ON A STRAND GUIDE OF A CONTINUOUS CASTING SYSTEM |
DE102004048618A1 (en) * | 2004-10-06 | 2006-04-13 | Sms Demag Ag | Method and roller segment for determining the core solidification and / or the sump tip in the continuous casting of metals, in particular of steel materials |
DE102006040012A1 (en) * | 2006-08-25 | 2008-02-28 | Sms Demag Ag | Strand guiding device and method for guiding a not yet solidified metal strip |
-
2008
- 2008-03-28 AT AT0049208A patent/AT506549B1/en not_active IP Right Cessation
-
2009
- 2009-02-23 KR KR1020107024086A patent/KR20100126846A/en not_active Application Discontinuation
- 2009-02-23 EP EP09724438A patent/EP2257397B1/en not_active Not-in-force
- 2009-02-23 WO PCT/EP2009/052099 patent/WO2009118222A1/en active Application Filing
- 2009-02-23 CN CN2009801193193A patent/CN102083571A/en active Pending
- 2009-02-23 AT AT09724438T patent/ATE552057T1/en active
Non-Patent Citations (1)
Title |
---|
See references of WO2009118222A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT506549B1 (en) | 2011-06-15 |
AT506549A1 (en) | 2009-10-15 |
KR20100126846A (en) | 2010-12-02 |
ATE552057T1 (en) | 2012-04-15 |
EP2257397B1 (en) | 2012-04-04 |
WO2009118222A1 (en) | 2009-10-01 |
CN102083571A (en) | 2011-06-01 |
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