EP0992302A1 - Procédé et dispositif de contrôle continu du réglage initiale et des paramètres d'oscillation d'une lingotière de coulée continue - Google Patents

Procédé et dispositif de contrôle continu du réglage initiale et des paramètres d'oscillation d'une lingotière de coulée continue Download PDF

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Publication number
EP0992302A1
EP0992302A1 EP99118135A EP99118135A EP0992302A1 EP 0992302 A1 EP0992302 A1 EP 0992302A1 EP 99118135 A EP99118135 A EP 99118135A EP 99118135 A EP99118135 A EP 99118135A EP 0992302 A1 EP0992302 A1 EP 0992302A1
Authority
EP
European Patent Office
Prior art keywords
mold
casting
strand
oscillation
hydraulic cylinders
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
EP99118135A
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German (de)
English (en)
Other versions
EP0992302B1 (fr
Inventor
Axel Weyer
Adolf Zajber
Rainer KÖNIG
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 Schloemann Siemag AG
SMS Demag AG
Schloemann Siemag AG
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Filing date
Publication date
Application filed by SMS Schloemann Siemag AG, SMS Demag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0992302A1 publication Critical patent/EP0992302A1/fr
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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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/166—Controlling or regulating processes or operations for mould oscillation
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the invention relates to a method and a device for the continuous control of the Basic setting and oscillation parameters of a continuous casting mold arranged in a lifting table.
  • the steel is introduced in a known manner from a ladle over shadow pipe, intermediate container and dip tube into the mold. This is in the upper area for receiving the dip tube funnel-shaped and designed for low-tension solidification of the strand skin.
  • a lubricating film is used special casting powder between the walls of the mold and the strand solidifying used. This and the use of a high-frequency oscillation system in Combined with an optimal mold geometry, optimal strip surfaces can be achieved.
  • Chill mold oscillation is an essential part of the continuous casting process of metals. It enables the required lubricating effect of the lubricant, for example casting powder or oil, and thus reduces the coefficient of friction or the sticking of a strand on the mold walls. This has resulted from the melting of casting powder Slag has proven particularly useful as a lubricant in the mold, taking care that the mold powder permanently covers the bathroom mirror.
  • the lubricant for example casting powder or oil
  • Eccentric drives generating a sinusoidal vibration form of the mold Frequency and amplitude are determined by the speed of the motor drive.
  • the essential oscillation parameters (negative strip, healing time, Amplitude and frequency of the mold oscillation as well as their combination) in every operating case must be set specifically for the quality of the cast product.
  • the free Selection of the oscillation parameters is therefore an essential component for optimization of the continuous casting process and consists essentially in the choice of an optimal combination of amplitude and frequency, with the negative strip within specified limits should be, preferably between 15 and 40%.
  • DE 37 04 793 C2 describes a device with two on a lifting table for the continuous casting mold or directly on this articulated eccentric shaft.
  • at least one propeller shaft is used, of which The rod end facing away from the eccentric shaft is arranged such that it can be changed in position, and the rod ends are rotatable against each other.
  • This can be a non-sinusoidal movement due to a deliberately generated gimbal error that occurs when a propeller shaft not in alignment between the shafts.
  • By changing height and lateral displacement of the rotary drive are different non-sinusoidal Movements of the mold can be realized.
  • EP 0 121 622 B1 describes a process for continuous casting using a Mold mounted in a frame, which is powered by two electrohydraulic drive units is vibrated.
  • the device is preferably operated at a frequency which is higher than the natural frequency of the vibration device.
  • An essential feature of the known sinusoidal and non-sinusoidal speed profiles is that the mold at a predetermined vibration frequency and Amplitude in each period, the time between two successive overtaking maneuvers of the strand through the mold when moving downward corresponds to an identical one Has speed and path course.
  • Casting speeds are required for the thin slab process with slab thicknesses of less than 100 mm of more than 4 m / min usual.
  • the stroke frequencies are correspondingly high the mold, with which the usual values of the negative strip are achieved, namely about 400 up to 450 strokes / min, or approx. 7.5 Hz.
  • At these high frequencies there are deviations of Vibration curve from the sinusoidal shape due to the small time intervals of around 0.13 up to 0.15 seconds / vibration can hardly be determined and have a lubricating behavior and the shell formation in the mold has hardly any influence.
  • the invention is based on the object using the oscillation technique one arranged in a lifting table and above this of four angular, double acting independent hydraulic cylinders in vibration-driven continuous casting mold to determine the actually existing oscillation forces with high accuracy and the now possible detection of the actually acting forces for the machine and Use process control directly.
  • the method in the preamble of claim 1 mentioned type with the invention proposed that the lifting table of the continuous casting mold of four angular, preferably double-acting hydraulic cylinders in Vibrations is driven and those actually acting on the hydraulic cylinders Oscillating forces in the casting break and / or casting operation are measured and diagnosed the casting machine and / or the casting process.
  • An embodiment of the method provides that by means of those used for the oscillation drive corner hydraulic cylinders the actually occurring oscillation forces in a plane perpendicular to the casting strand with an accuracy of about +/- 20 kg become.
  • Another embodiment of the method provides that the calculation of the Machine and process data b) to d) the working pressures on both sides of the work surface of the cylinder and two depending on the position-assigned forces opposite cylinder chambers determines the effectively resulting force of each cylinder becomes.
  • the measure has a particularly advantageous effect on the method that as a result Decoupling the mold and its oscillation parameters from forced operation empirical optimal adjustment of the vibration level to the withdrawal direction of the casting strand is set.
  • a further embodiment of the method provides that at an arbitrarily specified strand withdrawal speed the zero line of the mold vibrations relative to the position of the bath level during the casting process in accordance with the casting parameters, in particular the Casting speed is shifted up or down.
  • the oscillation device shown in the family tree in FIG. 1 comprises a rectangular one Lift table 10, which receives the mold 1 in a positive and non-positive manner.
  • This lifting table 10 is Free swinging on four servo hydraulic cylinders 2 to 5 and is based on proven Type of laterally supported, horizontally arranged leaf springs (not shown) in guided its vertical direction of vibration.
  • Each hydraulic cylinder 2 to 5 has one between an upper pressure chamber 7 and one lower pressure chamber 8 movably arranged piston 9, the upper and lower working surface can be acted upon by the working medium of the upper or lower pressure chamber 7, 8 is. From the difference in forces that arises in this way, the current effect results Force of a cylinder.
  • Each hydraulic cylinder 2 to 5 is a supply and discharge lines 11, 12 for pressure medium to and from the pressure chambers 7, 8 of the cylinder 2 to 5 controlling hydraulic valve 13 upstream and this a differential pressure calculator 14 to determine the effective resulting force of the hydraulic cylinder 2 to 5 is subordinate.
  • a position transmitter 15 is assigned to each hydraulic cylinder 2 to 5, from which by calculation in the centrally assigned computing unit 18 from those with the signal lines 16, 17 input measured data calculated control signals and this via command lines 19 to control the required operating functions to the corresponding operational control devices are transmitted.
  • the pressures of the individual pressure chambers 7, 8 of a cylinder 2 to 5 are determined by signal lines 11,12 connected to the hydraulic valve 13, which in turn with the pressure pump 20 for the operating medium is connected.
  • FIG. 2 shows a top view of the lifting table 10 with the arrangement of the lifting table and in Vibrating hydraulic cylinders 2 to 5.
  • the continuous casting mold 1 is approximately installed in the central area of the lifting table 10.
  • FIG. 3 shows a force / displacement diagram of an acceleration cycle using the example of a hydraulic cylinder.
  • the X-axis shows the effective force of the oscillation acceleration depending on the position b) of the piston assigned to this in the hydraulic cylinder.
  • the ratio is from the steepness of the diagram according to the angle ⁇ of force and position can be determined exactly, which is a possibility in practice Function monitoring, for example, the frictional forces between the mold walls and the strand shell or to detect irregularities, for example, breakage of one of the guide springs or a compensator or damage to a cylinder. It can be done by Determining the value F when reversing the direction of a hydraulic cylinder, for example a broken spring recognize quickly.
  • the invention enables precise monitoring at high oscillation frequencies the decisive operational functions of the casting machine and casting process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP99118135A 1998-10-02 1999-09-11 Procédé et dispositif de contrôle continu du réglage initiale et des paramètres d'oscillation d'une lingotière de coulée continue Expired - Lifetime EP0992302B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19845357 1998-10-02
DE19845357A DE19845357A1 (de) 1998-10-02 1998-10-02 Verfahren und Vorrichtung zur kontinuierlichen Kontrolle der Grundeinstellung und Oszillationsparameter einer Stranggießkokille

Publications (2)

Publication Number Publication Date
EP0992302A1 true EP0992302A1 (fr) 2000-04-12
EP0992302B1 EP0992302B1 (fr) 2003-06-25

Family

ID=7883149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99118135A Expired - Lifetime EP0992302B1 (fr) 1998-10-02 1999-09-11 Procédé et dispositif de contrôle continu du réglage initiale et des paramètres d'oscillation d'une lingotière de coulée continue

Country Status (3)

Country Link
EP (1) EP0992302B1 (fr)
AT (1) ATE243581T1 (fr)
DE (2) DE19845357A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070172A1 (fr) * 2001-03-02 2002-09-12 Sms Demag Aktiengesellschaft Procede pour determiner les caracteristiques d'un systeme d'oscillation d'une coquille oscillante pour coulee continue
EP1358955A1 (fr) * 2002-04-30 2003-11-05 SMS Demag AG Procédé et dispositif pour la reconnaissance de la condition des éléments ou des groupes d'une installation de coulée continue de métal fondu, en particulier d'acier fondu
WO2005105342A1 (fr) * 2004-04-24 2005-11-10 Sms Demag Ag Dispositif concu pour recevoir une coquille pour la coulee continue sur une table elevatrice permettant de couler des metaux liquides, notamment des materiaux a base d'acier
CN102861789A (zh) * 2012-10-23 2013-01-09 天津市先达精密压铸有限公司 压铸薄壁板零件调平专用夹具
US20170008076A1 (en) * 2014-02-14 2017-01-12 Danieli & C. Officine Meccaniche S.P.A. Control device for oscillating table
CN113894259A (zh) * 2021-08-27 2022-01-07 上海二十冶建设有限公司 一种板坯连铸结晶器在线对中调整方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004058356A1 (de) * 2004-12-03 2006-06-14 Sms Demag Ag Steuer- und/oder Regeleinrichtung für einen eine Stranggießkokille tragenden Hubtisch einer Stranggießvorrichtung für flüssige Metalle, insbesondere für flüssigen Stahlwerkstoff
DE102014202404A1 (de) 2014-02-11 2015-08-13 Sms Siemag Ag Oszillationseinrichtung für eine Stranggießkokille und diverse Prüfverfahren
DE102015202266A1 (de) 2015-02-09 2016-08-11 Sms Group Gmbh Verfahren und Vorrichtung zur Ermittlung der von einer Kolben-Zylindereinheit erzeugten Gesamtkraft
ES2562859B1 (es) * 2015-08-11 2016-12-22 Sarralle Equipos Siderúrgicos, S.L. Sistema de control de los cilindros de oscilación de un molde para colada continua
DE102017201496A1 (de) * 2017-01-31 2018-08-02 Sms Group Gmbh Oszillationssystem für eine Stranggießkokille, und Verfahren zum Erzeugen einer Oszillationsbewegung einer Stranggießkokille
CN107008875B (zh) * 2017-04-12 2022-07-05 宣化钢铁集团有限责任公司 实现小方坯连铸机双运行模式的装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121622A1 (fr) * 1983-03-07 1984-10-17 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Procédé et appareil pour la coulée continue utilisant un moule oscillant
EP0124362A1 (fr) * 1983-04-28 1984-11-07 Uss Engineers And Consultants, Inc. Système d'indication de la charge d'une installation d'oscillations d'une lingotière à coulée continue

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121622A1 (fr) * 1983-03-07 1984-10-17 KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. Procédé et appareil pour la coulée continue utilisant un moule oscillant
EP0124362A1 (fr) * 1983-04-28 1984-11-07 Uss Engineers And Consultants, Inc. Système d'indication de la charge d'une installation d'oscillations d'une lingotière à coulée continue

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002070172A1 (fr) * 2001-03-02 2002-09-12 Sms Demag Aktiengesellschaft Procede pour determiner les caracteristiques d'un systeme d'oscillation d'une coquille oscillante pour coulee continue
EP1358955A1 (fr) * 2002-04-30 2003-11-05 SMS Demag AG Procédé et dispositif pour la reconnaissance de la condition des éléments ou des groupes d'une installation de coulée continue de métal fondu, en particulier d'acier fondu
WO2005105342A1 (fr) * 2004-04-24 2005-11-10 Sms Demag Ag Dispositif concu pour recevoir une coquille pour la coulee continue sur une table elevatrice permettant de couler des metaux liquides, notamment des materiaux a base d'acier
CN102861789A (zh) * 2012-10-23 2013-01-09 天津市先达精密压铸有限公司 压铸薄壁板零件调平专用夹具
US20170008076A1 (en) * 2014-02-14 2017-01-12 Danieli & C. Officine Meccaniche S.P.A. Control device for oscillating table
US9731346B2 (en) * 2014-02-14 2017-08-15 Danieli & C. Officine Meccaniche S.P.A. Control device for oscillating table
CN113894259A (zh) * 2021-08-27 2022-01-07 上海二十冶建设有限公司 一种板坯连铸结晶器在线对中调整方法

Also Published As

Publication number Publication date
ATE243581T1 (de) 2003-07-15
EP0992302B1 (fr) 2003-06-25
DE19845357A1 (de) 2000-04-06
DE59906072D1 (de) 2003-07-31

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