EP1313579B1 - Stranggiessanlage mit soft-reduction-strecke - Google Patents

Stranggiessanlage mit soft-reduction-strecke Download PDF

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Publication number
EP1313579B1
EP1313579B1 EP01969503A EP01969503A EP1313579B1 EP 1313579 B1 EP1313579 B1 EP 1313579B1 EP 01969503 A EP01969503 A EP 01969503A EP 01969503 A EP01969503 A EP 01969503A EP 1313579 B1 EP1313579 B1 EP 1313579B1
Authority
EP
European Patent Office
Prior art keywords
pressure
soft
segment
billet
mode
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.)
Expired - Lifetime
Application number
EP01969503A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1313579A1 (de
Inventor
Werner Rahmfeld
Jacob Wetter
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1313579A1 publication Critical patent/EP1313579A1/de
Application granted granted Critical
Publication of EP1313579B1 publication Critical patent/EP1313579B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • 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 method and the corresponding device is mainly in the horizontal part of the strand guide of the continuous casting installed and serves to improve the quality of the structure and the surface quality of the cast product.
  • the soft reduction effect is achieved by reducing the strand thickness in the range its solidification with molten core up to the top of the liquid sump achieved.
  • the range in which soft-reduction has a significant impact the inner quality of the strand is in the solidification at FS: 0.3 to 0.8, accordingly a length position on the solidification paths.
  • the soft-reduction, the specifically in small steps performed thickness reduction in the range mentioned demonstrably reduces the segregation tendency in the melt.
  • the zone in which the strand thickness is reduced must be changeable in the longitudinal position of the strand.
  • the clamping cylinder used in the support segments.
  • the support segments are in Conveniently set for soft-reduction position to pass on Strand to make targeted thickness reduction. This procedure is practical fully processed and referred to as dynamic soft reduction, which, however, requires a lot of effort on the part of the technical implementation is.
  • the invention is based on the object, starting from the aforementioned state technology, a method and an apparatus for continuous casting of slabs or blocks, in particular of thin slabs, in the preamble of claim 1 type, which is a highly effective soft-reduction with reduced Expenditure of technical means with high quality of the result allows.
  • the process of the invention is that of the practical operation gained knowledge that a solidified part of the strand, if it enters the range of soft-reduction, not deformed may be because otherwise the support rollers or pressure rollers or their bearings or the Scaffolding construction of the segments would be damaged, especially then if several segments form the soft-reduction area and are conically set are.
  • Such a case may, for example, occur when the casting speed changes or as a result of a business interruption. in such a case got to then from the clamping pressure for soft-reduction, the hard pressure, to soft printing with preferably switched over 40% of the hard pressure at the outlet of the strand can be.
  • this conversion takes place automatically by hard pressure Soft pressure - and possibly vice versa - by determining a pressure increase pulse, in the Klemmzylindem created by the occurrence of non-deformable solidified strand in the conically set segment.
  • An embodiment of the method provides that during ongoing operation with Hard pressure of the soft reduction section, when reaching the upper limit or Switched to soft pressure, and vice versa while running Operating condition with soft pressure when reaching the lower pressure, limit or Switching value is switched to hard pressure.
  • the method according to the invention is further developed in that Inlet of a non-deformable, solidified strand part in one for hard pressure conically adjusted segment due to the resulting pressure rise pulse in the Klemmzylindem a switch from hard to soft pressure he follows.
  • the clamping cylinders are primarily with soft-reduction printing, the so-called Hard pressure, applied, with each movement of the cylinder piston a Pressure change causes.
  • a pressure sensor on the cylinder ensures that the Pressure increase in the cylinder is used to switch to the soft pressure.
  • a check valve by a relief valve partially open, allowing the segment to yield in the hydraulic circuit that is, the segment jaw width may change and solidify Strang stained the segment can pass under soft pressure.
  • an embodiment of the method according to the invention provides that after switching a segment to a soft-pressure operating state for a solidified strand part, in the case of the following inlet one not solidified strand part into the segment a print query is started, in short, intermittent intervals of soft pressure on hard - and vice versa - is switched and it is checked whether the pressures unchanged remain, or whether they are above or below the respective border or Switching value and that depending on the pressure test the setting on hard pressure or soft pressure. This measure becomes an wide opening of the segment due to the ferrostatic pressure of the melt prevented.
  • a further embodiment of the method according to the invention provides that all support segments in the soft-reduction area and in the behind Segments up to the end of the machine subjected to the intermittent pressure scan become. This ensures a uniform quality of the cast product.
  • An expedient embodiment of the method provides that a strand section is determined in particular in the horizontal part of the continuous casting, in which for the operating conditions of the casting operation, as well as for the steel grades used, the soft-reduction conditions apply.
  • the particular strand support section particular care must be taken that all the support segments are individually adjustable with the requisite conicity such that the continuous strand receives the deformation required for the soft reduction.
  • the hydraulically adjustable support segments are set individually against mechanical stops with a predetermined thickness to a predetermined level of soft reduction. The mechanical stops prevent too close movement of the support rollers and thus damage the entire support structure.
  • An apparatus for continuous casting of slabs or blocks, in particular of thin slabs in a continuous casting plant comprises a strand guide with a soft reduction section with pressure or support rollers, individually or as a Segment by means of hydraulic cylinders with change of the clamping cylinder pressure against each other Stepless and limited by stops with a clamping force can be acted upon.
  • a hydraulic circuit with a pressure sensor and provided by this controllable pressure changeover valve and arranged in the circuit block valve, a control valve and a relief valve, and with a pipe rupture protection comprising an overpressure protection with a check valve for application a hard-pressure clamping force within a range of the soft-reduction path, in which the strand is not yet solidified, or a clamping force with soft pressure within the range of the soft reduction range, in which the strand is solidified, and for the purpose of switching from hard to soft printing and vice versa.
  • the clamping force is provided by the hydraulic cylinders both over the frame top as well as over the frame base evenly in the Pressure rollers initiated.
  • FIG 1 the part of a support segment 1 for the cast in a continuous casting plant Strand 2, for example, to see a thin slab.
  • the support segment is located within the soft reduction section of the strand guide and points Pressure or support rollers 3, 4, which individually, or as in the present case, as Segment by means of the hydraulic cylinder 7 against each other continuously with a Clamping force is applied.
  • the numeral 30 denotes a mechanical stop of intended thickness, against which the lower segment part 6 against the segment frame upper part. 5 by the train of the piston rod of the cylinder 7 to the degree of soft-reduction can be adjusted individually.
  • the thickness of the cast thin slab in reduced in small increments to reduce segregation in the strand interior and to improve the surface finish.
  • the soft reduction range includes at least large lengths of the strand with molten core up to to the top of the liquid swamp.
  • Fig. 1 shows the working pressure of the hydraulic Circuit tapped above and below the piston in the hydraulic cylinder 7 and evaluated by the pressure sensor 10.
  • This pressure sensor 10 on the cylinder 7 ensures that an increase in pressure in the cylinder, for example, to switch used by Harttik on the soft print.
  • the clamping cylinders 7 are primarily at the soft-reduction pressure, i. with hard print, and are connected to a check valve 12, e.g. Pipe rupture or unlockable check valve in conjunction with an overpressure safety device 15 connected such that each movement of the cylinder piston causes a pressure change, which - as I said - in case of pressure increase the cylinder is used to switch to the soft pressure.
  • a check valve 12 e.g. Pipe rupture or unlockable check valve in conjunction with an overpressure safety device 15 connected such that each movement of the cylinder piston causes a pressure change, which - as I said - in case of pressure increase the cylinder is used to switch to the soft pressure.
  • the check valve 12 by the relief valve 14 so that the segment can yield, i.e., that the Segment jaw width can change, causing the solidified strand piece 2 the segment 1 can pass under soft pressure.
  • Figure 2 shows a segment 1 for the inlet of the strand 2 with a through Core 8 of liquid melt not closed strand shells 2 '.
  • the Segment frame includes the segment frame top 5 and the segment frame bottom 6, by hydraulic cylinders 7, 7 'against the ferrostatic Pressure of the strand shell 2 'and the liquid Schmelzenkems 8 with relatively high Force to be forced together.
  • the segment 1 has the Pressure guide rollers 2 and 4, which, for example, partially provided with drives are, as is well known.
  • the hydraulic cylinders 7 ' are with soft pressure and the hydraulic cylinder 7 applied with hard pressure in the context of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Fluid-Damping Devices (AREA)
  • Braking Arrangements (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
EP01969503A 2000-08-26 2001-07-25 Stranggiessanlage mit soft-reduction-strecke Expired - Lifetime EP1313579B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10042079 2000-08-26
DE10042079A DE10042079A1 (de) 2000-08-26 2000-08-26 Stranggießanlage mit Soft-Reduction-Strecke
PCT/EP2001/008574 WO2002018077A1 (de) 2000-08-26 2001-07-25 Stranggiessanlage mit soft-reduction-strecke

Publications (2)

Publication Number Publication Date
EP1313579A1 EP1313579A1 (de) 2003-05-28
EP1313579B1 true EP1313579B1 (de) 2004-06-16

Family

ID=7653960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969503A Expired - Lifetime EP1313579B1 (de) 2000-08-26 2001-07-25 Stranggiessanlage mit soft-reduction-strecke

Country Status (12)

Country Link
US (1) US6871693B2 (tr)
EP (1) EP1313579B1 (tr)
JP (1) JP2004507363A (tr)
KR (1) KR100796638B1 (tr)
CN (1) CN1280042C (tr)
AT (1) ATE269180T1 (tr)
AU (1) AU2001289743A1 (tr)
CA (1) CA2420604C (tr)
DE (2) DE10042079A1 (tr)
ES (1) ES2220803T3 (tr)
TR (1) TR200401680T4 (tr)
WO (1) WO2002018077A1 (tr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10236367A1 (de) * 2002-08-08 2004-02-19 Sms Demag Ag Verfahren und Vorrichtung zum dynamischen Anstellen von einen Giessstrang aus Metall, insbesondere aus Stahl, beidseitig stützenden und/oder führenden Rollensegmenten
DE102004002783A1 (de) * 2004-01-20 2005-08-04 Sms Demag Ag Verfahren und Einrichtung zum Bestimmen der Lage der Sumpfspitze im Gießstrang beim Stranggießen von flüssigen Metallen, insbesondere von flüssigen Stahlwerkstoffen
CN100493772C (zh) * 2005-07-28 2009-06-03 西安重型机械研究所 铸轧及动态轻压下用液压系统
DE102005055530A1 (de) * 2005-11-22 2007-05-24 Sms Demag Ag Verfahren und Vorrichtung zum Anstellen von mindestens einem Rollensegment einer Strangführungseinrichtung an einen Strang
DE102006048511A1 (de) * 2006-10-13 2008-04-17 Sms Demag Ag Strangführungsvorrichtung und Verfahren für deren Betrieb
DE102007016045A1 (de) * 2007-03-30 2008-10-02 Sms Demag Ag Vorrichtung zum hydraulischen Anstellen von Bauteilen
DE102008009136A1 (de) * 2008-02-14 2009-10-15 Sms Siemag Aktiengesellschaft Strangführung, insbesondere für eine Stahlbrammen-Stranggießanlage
DE102008025548A1 (de) * 2008-05-28 2009-12-03 Sms Siemag Aktiengesellschaft Strangführung, insbesondere für eine Stahlbrammen-Stranggießanlage
CN101920323B (zh) * 2010-08-02 2013-05-08 河北钢铁股份有限公司邯郸分公司 基于压力反馈检测铸坯凝固液芯末端的动态轻压下方法
CN103894572B (zh) * 2014-04-10 2016-09-07 北京科技大学 一种连铸坯预处理方法
EP3549695A1 (en) * 2014-05-14 2019-10-09 Nippon Steel Corporation Continuous casting method for slab
CN104148387B (zh) * 2014-07-11 2016-05-04 中冶东方工程技术有限公司 一种连铸热芯轧制方法
KR102410492B1 (ko) * 2015-07-23 2022-06-20 삼성디스플레이 주식회사 글라스 성형 장치
CN109500370B (zh) * 2018-11-12 2020-12-22 包头钢铁（集团）有限责任公司 一种宽厚板铸机压力控制动态轻压下的方法
CN112355262B (zh) * 2020-11-09 2021-10-15 湖南工程学院 一种用于板坯连铸动态轻压下的控制装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63238965A (ja) 1987-03-26 1988-10-05 Nkk Corp 軽圧下鋳造方法
JPS63242452A (ja) * 1987-03-30 1988-10-07 Nkk Corp 軽圧下鋳造方法
JPS63278655A (ja) 1987-05-12 1988-11-16 Nkk Corp 軽圧下鋳造方法
US5211217A (en) * 1989-08-16 1993-05-18 Diado Tokushuko Kabushiki Kaisha Vertical continuous casting method and casting apparatus
JPH04231104A (ja) * 1990-12-28 1992-08-20 Nippon Steel Corp 未凝固圧延装置
DE69601409T2 (de) * 1995-11-28 1999-09-02 Danieli Off Mecc Verfahren und Vorrichtung zum geregelten Vorwalzen von aus einer Stranggiessanlage austretenden Dünnbramme
DE19718886A1 (de) * 1997-05-03 1998-11-05 Bosch Gmbh Robert Verfahren zur Herstellung von porösen Formkörpern
DE19720768C1 (de) 1997-05-07 1999-01-14 Mannesmann Ag Verfahren und Vorrichtung zum Erzeugen von Brammen aus Stahl
DE10007706A1 (de) * 2000-02-19 2001-08-23 Sms Demag Ag Verfahren und Anlage zum Gießen von Vorprodukten in einer Stranggießanlage

Also Published As

Publication number Publication date
CN1449314A (zh) 2003-10-15
CA2420604C (en) 2010-01-19
JP2004507363A (ja) 2004-03-11
ATE269180T1 (de) 2004-07-15
KR100796638B1 (ko) 2008-01-22
CA2420604A1 (en) 2003-02-26
TR200401680T4 (tr) 2004-08-23
DE50102621D1 (en) 2004-07-22
AU2001289743A1 (en) 2002-03-13
US6871693B2 (en) 2005-03-29
KR20030036708A (ko) 2003-05-09
US20040026066A1 (en) 2004-02-12
CN1280042C (zh) 2006-10-18
EP1313579A1 (de) 2003-05-28
DE10042079A1 (de) 2002-04-25
WO2002018077A1 (de) 2002-03-07
ES2220803T3 (es) 2004-12-16

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