EP1412111B1 - Verfahren zum einstellen der dynamischen soft reduction an stranggiessmaschinen - Google Patents
Verfahren zum einstellen der dynamischen soft reduction an stranggiessmaschinen Download PDFInfo
- Publication number
- EP1412111B1 EP1412111B1 EP02750980A EP02750980A EP1412111B1 EP 1412111 B1 EP1412111 B1 EP 1412111B1 EP 02750980 A EP02750980 A EP 02750980A EP 02750980 A EP02750980 A EP 02750980A EP 1412111 B1 EP1412111 B1 EP 1412111B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segment
- casting
- segments
- soft reduction
- billet
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009749 continuous casting Methods 0.000 title claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 3
- 239000000498 cooling water Substances 0.000 claims 1
- 239000002436 steel type Substances 0.000 claims 1
- 238000004364 calculation method Methods 0.000 description 10
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010845 search algorithm Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- B22D11/16—Controlling or regulating processes or operations
-
- 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 method for adjusting the dynamic soft reduction on continuous casting plants, in particular in the continuous casting of slabs.
- a probate countermeasure is the employment of strand guide segments below the mold at a certain rate to grow on each other Unite strand bowls together. This procedure designates one as a soft reduction.
- the end of a segment is determined by the position of the tangent point of the determined last roles of the segment; consequently, it is immediately behind this Roll pair also the beginning of the next segment scheduled.
- the skewing (tap adjustment) of the segment upper frame is called conicity the continuous casting machine (CCM).
- CCM conicity the continuous casting machine
- This consists of two Sizes together: the thermal conicity based on the shrinkage of the Casting by cooling and solidification, as well as the Soft Reduction Share, which is set separately. The latter may, if not expressly otherwise required, also take the size "0".
- the segments are 0 to 7, taking into account the thermal taper clamped on a stop and the segments 8 to 14 (Cyberlink) become the CCM depending on the mode driven to a certain preselected distance, taking into account the Max. Forces that can be initiated in the segment.
- the adjustment strategy for setting up the new boundary conditions is in the following sections.
- TTSR thermal tracking calculation
- Liquid Fraction is generated via the material data records of the TTSR. certainly.
- the Liquid Fraction designates in the liquid swamp of the strand the proportion between liquid and already solidified crystals.
- the value of this Metric is between 0 and 1, where 0 is the location of the full Solidus describes and 1 the position of the liquidus temperature in the Strand.
- the "Thermal Taper" for the casting machine can be over the same mask configure.
- the input is from six different segment positions (Quotas with liquid fraction fraction) are provided to influence the sump tip.
- the TTSR value for the Liquid Fraction calculated from this information the intersection of the liquid fraction with the notional midline of the strand. This value is measured from the pouring level in the mold in Direction to the cutting machine. From this parameter can then the corresponding strand segment can be determined that with the given Quota is charged.
- TTSR seeks from the point of complete Solidification from backwards towards the mold after the first intersection with the imaginary centerline and determines the segment number. Then the search algorithm jumps to the next segment (Solidus -1) and again determines the first there Liquid Fraction Intersection. This continues until the end.
- the associated segment employment rates are set in analogy.
- the TTSR calculation is triggered in a short rhythm of, for example, 10 s, so that then the current calculation is output again.
- the Level 2 accessible data from the Pattem or from their changes are converted to a telegram to the level 1, in which the current Quotas for employment of segmental frames are reported.
- the maximum permissible change in the quota per cycle was limited to 0.2 mm / m.
- Level 1 informs you about the current one every 5 seconds Position of the jaw width of the segment output.
- TTSR in level 2 a "CaDesign” an image for the calculation of Casting machine created, sets level 1 on the information of the mouth width of the exit dimension of the segment 7.
- the segments in the horizontal part of the casting machine are hydraulically to a predetermined Measure adjustable. After setting the quotas, the mouth widths approached by changing the position of the upper frame. The default the odds are made by the Level 2 Automation, while the repositioning the mouth width is regulated by Level 1.
- the control of the segment thus operates in an operating window, the is determined by the minimum and maximum force, and takes care of all Circumstances that the upper frame with the appropriate force on the Losseite the slab rests.
- the segment After the head has passed, the segment lowers again.
- the upcoming one Force corresponds to the hot rod pressure.
- the sump tip Calculated in the appropriate segment can also be the Soft Reduction driving style be activated after checking the plausibility by level 1.
- the segment 8 becomes Gradually lowered to the specified soft reduction position.
- TTSR must decide on the basis of the comparison with the Liquid Fraction calculation, whether only one segment is needed for the soft reduction strategy, or a second is charged to the Soft Reduction Quote.
- the jaw width of the segment exit becomes j-m adapted according to the Soft Reduction Taper.
- those between j and the caster end are also Segments on the new slab thickness taking into account the thermal Adapted to Tapers.
- TTSR calculates first the change in the sump tip and leaves the segment frame so switch long until either the sump tip has run back into the segment 7 is or the Ausziehmaschine stopped for the flying distributor change Has.
- TTSR When the pouring end is initiated, TTSR first calculates the change in the sump tip and keeps the segment frames shifting until either the sump tip has returned to segment 7 or if the extraction machine is stopped for slagging. After definition, the state that has now been reached is frozen.
- the Soft Reduction driving style is then turned off when the Level 1 system is on gives the command to raise the segment upper frame.
- the above-described method for setting the dynamic soft reduction is not only applicable to conventional slabs, but also to so-called thin slabs.
Description
- die Gießgeschwindigkeit Vc,
- die Wassermenge,
- die Stahlsorte,
- die Dicke des Stranges in der Gießmaschine.
- ein Dialog mit Hilfe vom Keyboard zur Neueingabe und Änderung, über fest gespeicherte Pattem aus diesem Dialog, die an die Schmelze gekoppelt sind.
- Soft Reduction Quote [mm/m],
- Liquid Fraction Anteil vor der Durcherstarrung.
Nach der Definition wird der jetzt erreichte Zustand eingefroren.
Claims (6)
- Verfahren zur Einstellung der dynamischen Soft Reduction an Stranggießanlagen, insbesondere beim Stranggießen von Brammen,
dadurch gekennzeichnet, dass die Lage der Sumpfspitze sowie die Anteile Fest und Flüssig im Gießstrang errechnet werden und nach Maßgabe der Lageveränderungen der Sumpfspitze ein oder mehrere Segmente der Strangführung verstellt werden. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass zur Berechnung der Lage der Sumpfspitze ein thermodynamisches Rechenmodell zur Bestimmung der Temperaturprofile im Strang während des Gießens eingesetzt wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass in dem Rechenmodell wesentliche Gießparameter wieGießgeschwindigkeit Vcdie Kühlwassermengedie Stahlsortedie Dicke des Stranges in der GießmaschineWärmeleistung der KokilleRollenplan der Strangführung oder dergleichen - Verfahren nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass bei einer Lagerveränderung der Sumpfspitze in Richtung auf das letzte Rollenpaar der Gießmaschine die Segmentanstellung dann verändert wird, wenn die neue Lage um ≥10 cm vorgeschoben ist, und im umgekehrten Fall die Segmenteinstellung dann aktiviert wird, wenn die berechnete Sumpfspitze um ≥40 cm zurückgenommen worden ist. - Verfahren nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass mittels des thermodynamischen Rechenmodells die Lage der Sumpfspitze in vorgegebenen Zyklen errechnet wird. - Verfahren nach Anspruch 5,
dadurch gekennzeichnet, dass die Änderung der Anstellung der Segmente je Zyklus auf einen Default Wert limitiert ist.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10126956 | 2001-06-01 | ||
DE10126956 | 2001-06-01 | ||
DE10141128A DE10141128A1 (de) | 2001-06-01 | 2001-08-22 | Verfahren zum Einstellen der dynamischen Soft Reduction an Stranggießmaschinen |
DE10141128 | 2001-08-22 | ||
PCT/EP2002/005768 WO2002098587A2 (de) | 2001-06-01 | 2002-05-25 | Verfahren zum einstellen der dynamischen soft reduction an stranggiessmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1412111A2 EP1412111A2 (de) | 2004-04-28 |
EP1412111B1 true EP1412111B1 (de) | 2004-12-01 |
Family
ID=26009459
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02750980A Expired - Lifetime EP1412111B1 (de) | 2001-06-01 | 2002-05-25 | Verfahren zum einstellen der dynamischen soft reduction an stranggiessmaschinen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1412111B1 (de) |
AT (1) | ATE283742T1 (de) |
AU (1) | AU2002344361A1 (de) |
WO (1) | WO2002098587A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2564192C1 (ru) * | 2014-04-02 | 2015-09-27 | Открытое акционерное общество "Уральский завод тяжелого машиностроения" | Способ мягкого обжатия непрерывнолитой заготовки |
EP2788133B1 (de) | 2011-12-05 | 2016-02-03 | Primetals Technologies Austria GmbH | Prozesstechnische massnahmen in einer stranggiessmaschine bei giessstart, bei giessende und bei der herstellung eines übergangsstücks |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7121323B2 (en) | 2002-02-22 | 2006-10-17 | Sms Demag Ag | Method and device for the continuous casting and direct shaping of a metal strand, in particular a steel cast strand |
DE102005030837B4 (de) * | 2005-07-01 | 2024-04-04 | Sms Group Gmbh | Verfahren und Stranggießvorrichtung zum Verformen eines gießwarmen Stranges aus Metall, insbesondere aus Stahl oder Stahlwerkstoffen |
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 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5160633A (en) * | 1974-11-25 | 1976-05-26 | Nippon Kokan Kk | Haganeno renzokuchuzoho |
JPS57139458A (en) * | 1981-02-20 | 1982-08-28 | Nippon Steel Corp | Controlling method for perfect solidification position of ingot in continuous casting |
DE19931331A1 (de) * | 1999-07-07 | 2001-01-18 | Siemens Ag | Verfahren und Einrichtung zum Herstellen eines Stranges aus Metall |
DE10045250A1 (de) * | 2000-09-13 | 2002-03-21 | Sms Demag Ag | Verfahren und Einrichtung zum Bestimmen der Lage der Enderstarrung im Gießstrang beim Stranggießen von Metallen, insbesondere von Stahl |
-
2002
- 2002-05-25 WO PCT/EP2002/005768 patent/WO2002098587A2/de not_active Application Discontinuation
- 2002-05-25 AT AT02750980T patent/ATE283742T1/de active
- 2002-05-25 AU AU2002344361A patent/AU2002344361A1/en not_active Abandoned
- 2002-05-25 EP EP02750980A patent/EP1412111B1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2788133B1 (de) | 2011-12-05 | 2016-02-03 | Primetals Technologies Austria GmbH | Prozesstechnische massnahmen in einer stranggiessmaschine bei giessstart, bei giessende und bei der herstellung eines übergangsstücks |
RU2564192C1 (ru) * | 2014-04-02 | 2015-09-27 | Открытое акционерное общество "Уральский завод тяжелого машиностроения" | Способ мягкого обжатия непрерывнолитой заготовки |
Also Published As
Publication number | Publication date |
---|---|
WO2002098587A3 (de) | 2004-02-19 |
AU2002344361A1 (en) | 2002-12-16 |
ATE283742T1 (de) | 2004-12-15 |
WO2002098587A2 (de) | 2002-12-12 |
EP1412111A2 (de) | 2004-04-28 |
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