EP2523764A1 - Regelverfahren für den giessspiegel einer stranggiesskokille - Google Patents
Regelverfahren für den giessspiegel einer stranggiesskokilleInfo
- Publication number
- EP2523764A1 EP2523764A1 EP10798820A EP10798820A EP2523764A1 EP 2523764 A1 EP2523764 A1 EP 2523764A1 EP 10798820 A EP10798820 A EP 10798820A EP 10798820 A EP10798820 A EP 10798820A EP 2523764 A1 EP2523764 A1 EP 2523764A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- controller
- control method
- continuous casting
- output signal
- 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
- B22D11/16—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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
Definitions
- the present invention relates to a control method for the casting level of a continuous casting mold.
- a measured actual value of the casting level is supplied to a casting ⁇ mirror controller, which determines on the basis of the actual value and a corresponding target value, a target position for the closure device and the closure means supplies,
- Such a control method is known for example from US 5,921,313 A.
- a vibration compensator is provided which compensates Bulgingschwingungen.
- the present invention further relates to a Computerpro ⁇ program comprising machine code that can be executed directly by a control device for a continuous casting and whose execution caused by the control means that the control device controls the casting level of a continuous casting ⁇ mold of the continuous caster according to such Regelver ⁇ driving rules.
- the present invention further relates to a control device for a continuous casting plant, which is designed in this way is that it performs such a control method during operation.
- the present invention relates to a continuous casting plant, which is controlled by such a control device.
- the pouring level in the continuous casting mold is undesirably influenced by, inter alia, sudden disruptions.
- undesirable disturbances are the so-called “clogging” and “unclogging”, ie the sudden caking or cancel alumina in Zulaufka ⁇ nal of the mold.
- the meniscus can be influenced by ruckarti ⁇ ges peeling of the metal strand in an undesirable manner.
- Each disturbance of the pouring mirror means one
- the G chipspiegelregler is usually designed as a PI controller or as a PID controller, which also has several additional functions to combat specific disorders.
- An example of such an additional function is the abovementioned compensation of bulging oscillations.
- the integral part of the mold level regulator is required in the prior art in order to find and hold the stationary set position for the closure device.
- the pouring level regulator In the case of sudden inflow disturbances or withdrawal disorders, the pouring level regulator must react quickly.
- the integral component of the G manLitereglers must settle quickly to a new desired position for the closure device.
- An integral component with a short reset time will respond quickly, but will overshoot.
- An integral component with a large reset time will not overshoot, but it will react too slowly.
- the meniscus can not quickly still subdued and reliable Retired to its setpoint be ⁇ into the desired level again.
- the object of the present invention is to provide ways to achieve a more accurate control.
- the expectation value for the meniscus instantaneously from the measured actual value of the meniscus subtra ⁇ is hiert. By doing so, a faster response to pouring mirror disturbances can be achieved. It is preferably provided that the start-up factor has an initial value at the beginning of the control method and is steadily increased to a final value in the course of the control method. By this procedure, a troublefree ⁇ approximately free connection of the Störetznkompensators is in particular possible. This is especially true if the initial value of the Aufschalt ⁇ factor is zero and the end value of the Aufschaltcons is one.
- the G recognizespiegelregler is usually designed as a controller with Integ ⁇ ral , for example, as a PI controller or as a PID controller. Due to its integral behavior, the casting level controller has a readjustment time.
- the reset time is characteristic of how fast the G stealaptregler reacts to disturbances.
- the G toyspie ⁇ gelregler reacts quickly to disturbances with a small reset time, but tends to overshoot.
- the G stealspiegelregler reacts stable reactivity to G stealspiegelinen at a large readjustment, but reacts slower.
- the reset time of the G confuseLitereglers currency ⁇ ing and / or increased after increasing the Aufschaltcons of an initial value to a final value is provided.
- the initial value and the final value of the integral are of course at ⁇ particular values as the initial value and the final value of ⁇ intrusion factor.
- the final value of the reset time is finite. In this case, an integral component of the G manspie ⁇ gelreglers is maintained under all operating conditions. However, it is also possible that the final value of the reset time is infinite. This corresponds to a complete shutdown of the Integralanteils of the G manLitereglers. For example, if the mold level governor is designed as a PI controller, it only works as a P controller with an integral time of infinity. Likewise, for example, a PID controller can be reduced to a PD controller by increasing the reset time to the value infinite.
- the differential controller is (at least) designed as a proportional controller. It therefore has a proportional gain.
- the proportional gain is increased during and / or after increasing the turn-on factor from an initial value to a final value.
- the initial value and the final value of the Proporti ⁇ onalverstärkung here are values other than the initial value and the final value of the Aufschaltcons.
- Increasing the proportional gain of the differential controller and increasing the reset time of the G fauxLitereglers are independent. It is thus possible to increase only one value and to keep the other value constant or to increase both values. Also, in the case that both
- the initial value of the proportional gain of the differential controller can be determined as needed.
- the on ⁇ initial value is equal to a proportional gain of the G manLitereglers.
- the differential controller can be designed, for example, as a PI controller or as an even more complex controller. However, it is preferred that the differential controller is designed as a pure P controller.
- the present invention is further achieved by a computer program of the type mentioned, in which effects the exporting ⁇ tion of the computer program that controls the processing Steuereinrich ⁇ casting level of the continuous casting according to the invention a ⁇ OF INVENTION control method.
- the computer program can for example be stored on a data carrier in machine-readable form.
- the disk may be particularly Be ⁇ standing part of the control device.
- FIG. 3 schematically shows the internal structure of a disturbance variable compensator
- a continuous casting plant has a continuous casting mold 1.
- liquid metal 3 is poured over a dip tube, for example steel or aluminum ⁇ minium.
- the inflow of the liquid metal 3 into the continuous casting mold 1 is adjusted by means of a closure device 4.
- Shown in FIG. 1 is an embodiment of the closure device 4 as a sealing plug. In this case, a position of the shutter 4 corresponds to a
- the closure device 4 may be designed as a slide. In this case, the closed position corresponds to the slider position.
- the liquid metal 3 contained in the continuous casting mold 1 is cooled by means of cooling devices, so that a strand shell 5 is formed.
- the core 6 of the metal strand 7 is ever ⁇ still liquid. He freezes later.
- the cooling devices are not shown in FIG.
- the solidified metal strand 7 solidified shell 5, liquid core 6) is removed from the Strangg phoneko ⁇ kille 1 by means of a trigger mechanism. 8
- the pouring level 9 of the liquid metal 3 in the continuous casting mold 1 should be kept as constant as possible.
- a trailing zugs technically v at which the solidified metal ⁇ strand 7 is withdrawn from the continuous casting mold 1, is generally constant. Therefore, both in the prior art as well as in the present invention, the position of the closure device 4 tracked to adjust the inflow of liq ⁇ sigen metal 3 in the continuous casting mold 1 so that the casting mirror 9 is kept as constant as possible.
- a corresponding measuring device 10 known as such
- an actual value hG of the pouring mirror 9 is detected.
- the actual value hG is fed to a control device 11 for the continuous casting plant.
- the control device 11 determines, according to a control method, which is explained in more detail below, a desired position p * to be assumed by the closure device 4.
- the closure device 4 is then controlled accordingly by the control device 11.
- the control device 11 outputs a corresponding actuating signal to an adjusting device 12 for the closure device 4.
- the adjusting device 12 may be, for example, a hydraulic cylinder unit.
- an actual position p of the closure device 4 is further detected by means of a corresponding measuring device 13 (known as such) and fed to the control device 11.
- a closed-loop control of the closure position takes place.
- a pure control open loop control
- the control device 11 is designed such that it carries out an inventive control method during operation.
- the mode of operation of the control device 11 is determined by a computer program 14 with which the control device 11 is programmed.
- the computer ⁇ program 14 is stored within the control device 11 in a disk 15, for example a Flash-EPROM.
- the data carrier 15 is part of the control device 11. The storage takes place in machine-readable form.
- the computer program 14 may have been supplied to the control device 11 via a mobile data carrier 16, for example a USB memory stick (shown) or an SD memory card (not shown). Also on the mobile data carrier 16, the computer program 14 is stored in machine-readable form. Alternatively, it is possible to feed the computer program 14 to the control device 11 via a computer network connection or a programming device.
- the computer program 14 comprises machine code 17, which is directly executable by the control device 11. The execution of the machine code 17 by the control device 11 causes the control device 11 to control the pouring level 9 of the continuous casting mold 1 according to a control method according to the invention. This control method will be explained below in connection with FIGS Ver ⁇ 2 and 3 in more detail.
- FIG. 2 shows a control arrangement implemented by the control device 11.
- the operation of the control arrangement of Figure 2 enables an inventive control method for the casting ⁇ mirror 9 of the continuous casting mold. 1
- the control arrangement has a pouring-mirror regulator 18.
- the casting-level controller 18 determined on the basis of a target ⁇ value hG * for the meniscus 9 and detected by means of the Messein ⁇ device 10 actual value hG for the meniscus 9 ge ⁇ Gurss a controller characteristic, the target position p * for the closure mechanism 4.
- the controller characteristic of the casting mirror controller 18 is according to the representation of FIG 2 propor ⁇ tional-integral.
- the pouring-mirror regulator 18 is preferably designed as a regulator with integral behavior.
- the desired position p * for the closure device 4 is supplied to the closure device 4.
- the set position is fed to a position controller 19, to which the actual position p of the closure device 4 is also supplied.
- the position controller 19 may be formed, for example, as a P controller.
- the actual position p of the closure device 4 acts on the actual pouring mirror 9 due to the inflow of liquid metal 3 which has thus been set.
- the actual value hG of the pouring mirror gels 9 is detected and, as already mentioned, the G manspie ⁇ gelregler 18 fed.
- the disturbance variable compensator 20 comprises inter alia an integrator 21.
- An integration time constant TK of the integrator 21 is preferably determined by the cross section of the continuous casting mold 1, the measuring range 5hG of the measuring device 10 for the actual value hG of the pouring mirror 9 and the measuring range ⁇ of the measuring device 13 for the Actual position p as well as the
- the integrator 21 is supplied with an input value within the disturbance variable compensator 20 which will be discussed later.
- the integrator 21 determines by integrating the input value according to the integration time constant TK an output signal hE.
- the output signal hE corresponds to an expected value hE for the pouring mirror 9.
- the expected value hE is fed within the disturbance variable compensator 20 to a node 22, which continues to receive the
- the measuring device 10 for the meniscus 9 is tarry ⁇ approximately afflicted.
- the actual value hG of the pouring mirror 9 therefore has a delay time. It is possible to actively delay the expected value hE by means of a delay element.
- the delay element would have to be arranged between the integrator 21 and the node 22 for this purpose. Preferably, however, no such delay element is present.
- the expected value hE for the pouring mirror 9 is therefore preferably subtracted without delay from the measured actual value hG of the pouring mirror 9.
- the difference e is fed to a differential controller 23 within the disturbance compensator 20.
- the differential controller 23 uses the difference e to determine a controller output signal e '.
- the differential controller 23 may be formed as needed.
- the differential controller 23 may be formed as a PI controller. It is preferred that the differential controller 23 is designed as a pure P controller. Regardless of its specific embodiment, however, the differential controller 23 has a proportional gain kP.
- the controller output signal e 'already corresponds to a disturbance compensation value z, which is to be switched to the desired position p * of the closure device 4.
- the regulator output signal e ' is multiplied in a multiplier 24 by a breakdown factor k.
- the contact factor k can have a fixed value.
- the on ⁇ switching factor at the start of the control method comprises k corresponding to the illustration of Figure 4 kA and an initial value is increased in the course of the control method continuously to a final value kE.
- an inflow signal Z is derived according to FIG. 3 from the actual position p of the closure device 4.
- the inflow signal Z can be determined by determining the inflow Z based on the actual position p of the closure device 4 and the characteristic curve K of the closure device 4, which results at the given actual position p of the closure device 4.
- the Aufschaltmate is fed in ⁇ within the Störuggnkompensators 20 to the integrator 21 as its input signal.
- the G foolLiteregler 18 vorzugswei ⁇ se is designed as a controller with integral behavior.
- the pouring-mirror regulator 18 therefore preferably has an adjusting time TN.
- the reset time TN is characteristic of the In ⁇ tegral the G manavareglers 18th
- the reset time TN of the G goLitereg ⁇ lers 18 is kept constant over time.
- the reset time TN of the leveling mirror regulator 18 be increased during an initial value TA to an end value TE during and / or after the increase of the startup factor k.
- 4 shows an increase in the reset time TN during the increase of the Aufschaltfak- sector k.
- FIG. 5 shows an increase in the reset time TN after the increase in the turn-on factor k.
- Other embodiments are possible. For example, increasing the readjustment ⁇ time TN with the increase of the Aufschaltcons can advertising started k and beyond the time when the override factor k reaches its final value kE. It is also possible to start increasing the reset time TN at a point in time at which the override factor k is already greater than its initial value kA but still smaller than its final value kE.
- the final value TE of the reset time TN is final lent. In this case, even after reaching the final value TE of the reset time TN a - albeit reduced - integral behavior of the G manLitereglers 18 maintained.
- it is possible to increase the reset time TN to the final value TE infinity. In this case, the integral behavior of the G manLitereglers 18 is completely suppressed.
- the proportional gain kP of the differential regulator 23 is constant throughout the control process. However, according to the representations of FIGS. 4 and 5, it is preferred that the proportional gain kP is increased during an increase of the turn-on factor k from an initial value kPA to a final value kPE (see FIG. 4) and / or (see FIG. 5). Similar to increasing the reset time TN embodiments are also possible here that, for example, although increasing the proportional gain kP of the differential controller 23 is started together with the increase of the on ⁇ switching factor k, but extends beyond the time at which the Aufschaltmin k its end value reached kE. It is also possible, for example, to start increasing the proportional gain kP of the differential controller 23, while the override factor k has an intermediate value between its initial value kA and its final value kE.
- the initial value kPA of the proportional gain kP of the differential controller 23 may be selected as needed.
- the initial value kPA is equal to a proportional gain k 'of the G manLitereglers 18th
- the present invention has many advantages.
- the control method according to the invention the
- Störly conductingnkompensator 20 largely determining the stationary nominal position p * of the closure device 4.
- the Stör conductingnkompensator 20 dynamically cheaper than the integral portion of the G manharireglers 18.
- the reset time TN of the G manharireglers 18 can therefore be made larger, because the integral component only minor inaccuracies must compensate. In some cases, the integral component can even be omitted (reset time TN against infinity).
- the inventive control method so-can with considerably better jump-like disorders in feeding liquid metal 3 in the continuous casting mold 1 and at the Ab ⁇ pull the metal strand 7 from the continuous casting mold 1 REA be yawed and thus the pouring mirror 9 are kept better constant.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Feedback Control In General (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10798820.6A EP2523764B1 (de) | 2010-01-15 | 2010-12-28 | Regelverfahren für den giessspiegel einer stranggiesskokille |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP10150817A EP2353752A1 (de) | 2010-01-15 | 2010-01-15 | Regelverfahren für den Gießspiegel einer Stranggießkokille |
| EP10798820.6A EP2523764B1 (de) | 2010-01-15 | 2010-12-28 | Regelverfahren für den giessspiegel einer stranggiesskokille |
| PCT/EP2010/070769 WO2011085938A1 (de) | 2010-01-15 | 2010-12-28 | Regelverfahren für den giessspiegel einer stranggiesskokille |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2523764A1 true EP2523764A1 (de) | 2012-11-21 |
| EP2523764B1 EP2523764B1 (de) | 2018-01-24 |
Family
ID=41728190
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10150817A Withdrawn EP2353752A1 (de) | 2010-01-15 | 2010-01-15 | Regelverfahren für den Gießspiegel einer Stranggießkokille |
| EP10798820.6A Active EP2523764B1 (de) | 2010-01-15 | 2010-12-28 | Regelverfahren für den giessspiegel einer stranggiesskokille |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10150817A Withdrawn EP2353752A1 (de) | 2010-01-15 | 2010-01-15 | Regelverfahren für den Gießspiegel einer Stranggießkokille |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20120296466A1 (de) |
| EP (2) | EP2353752A1 (de) |
| KR (1) | KR20120102813A (de) |
| CN (1) | CN102712038B (de) |
| BR (1) | BR112012017439B1 (de) |
| RU (1) | RU2520459C2 (de) |
| WO (1) | WO2011085938A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226953B (zh) * | 2013-06-24 | 2016-04-13 | 上海梅山钢铁股份有限公司 | 基于拉坯力补偿结晶器钢水液位的方法 |
| CN104281166B (zh) * | 2013-07-04 | 2017-03-01 | 中国钢铁股份有限公司 | 连铸机的液位控制方法 |
| AT518461B1 (de) * | 2016-04-11 | 2019-12-15 | Primetals Technologies Austria GmbH | Gießspiegelregelung mit Störgrößenkompensation |
| JP6624224B2 (ja) * | 2017-03-30 | 2019-12-25 | Jfeスチール株式会社 | 連続鋳造機の湯面レベル制御装置、連続鋳造機の湯面レベル制御方法およびスラブ製造方法 |
| CN118519481B (zh) * | 2024-07-23 | 2024-09-27 | 深圳市宏源建设科技有限公司 | 灌注桩施工液面实时反馈控制方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54153663A (en) * | 1978-05-24 | 1979-12-04 | Nippon Kokan Kk | Method of removing nozzle for measured signal of molten material level in mold for continuous casting |
| JPS5946705B2 (ja) * | 1979-10-04 | 1984-11-14 | 川崎製鉄株式会社 | 連鋳モ−ルド内の溶融金属レベル制御方法 |
| SU1097440A1 (ru) * | 1982-09-16 | 1984-06-15 | Вологодский Политехнический Институт | Способ автоматического регулировани уровн металла в качающемс кристаллизаторе машины непрерывного лить заготовок и устройство дл его осуществлени |
| JPS6057217A (ja) * | 1983-09-09 | 1985-04-03 | Nippon Kokan Kk <Nkk> | 渦流式モ−ルド湯面計 |
| FR2703277B1 (fr) * | 1993-03-30 | 1995-05-24 | Lorraine Laminage | Procédé et dispositif de régulation du niveau de métal liquide dans une lingotière de coulée continue des métaux. |
| DE19640806C2 (de) * | 1996-10-02 | 2002-03-14 | Siemens Ag | Verfahren und Einrichtung zum Gießen eines Stranges aus flüssigem Material |
| EP1097765A4 (de) * | 1999-04-28 | 2005-02-09 | Sumitomo Metal Ind | Steuerung des schmelzlevels beim stranggiessen |
-
2010
- 2010-01-15 EP EP10150817A patent/EP2353752A1/de not_active Withdrawn
- 2010-12-28 RU RU2012134772/05A patent/RU2520459C2/ru active
- 2010-12-28 US US13/522,457 patent/US20120296466A1/en not_active Abandoned
- 2010-12-28 EP EP10798820.6A patent/EP2523764B1/de active Active
- 2010-12-28 KR KR1020127021187A patent/KR20120102813A/ko not_active Ceased
- 2010-12-28 CN CN201080061496.3A patent/CN102712038B/zh active Active
- 2010-12-28 WO PCT/EP2010/070769 patent/WO2011085938A1/de not_active Ceased
- 2010-12-28 BR BR112012017439-8A patent/BR112012017439B1/pt active IP Right Grant
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011085938A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011085938A1 (de) | 2011-07-21 |
| KR20120102813A (ko) | 2012-09-18 |
| EP2353752A1 (de) | 2011-08-10 |
| RU2520459C2 (ru) | 2014-06-27 |
| RU2012134772A (ru) | 2014-02-20 |
| CN102712038B (zh) | 2014-07-30 |
| BR112012017439B1 (pt) | 2019-07-16 |
| CN102712038A (zh) | 2012-10-03 |
| US20120296466A1 (en) | 2012-11-22 |
| EP2523764B1 (de) | 2018-01-24 |
| BR112012017439A2 (pt) | 2016-04-19 |
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