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WO2009115174A1 - Dispositif de guidage de barre et son procédé de fonctionnement - Google Patents

Dispositif de guidage de barre et son procédé de fonctionnement Download PDF

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Publication number
WO2009115174A1
WO2009115174A1 PCT/EP2009/001309 EP2009001309W WO2009115174A1 WO 2009115174 A1 WO2009115174 A1 WO 2009115174A1 EP 2009001309 W EP2009001309 W EP 2009001309W WO 2009115174 A1 WO2009115174 A1 WO 2009115174A1
Authority
WO
WIPO (PCT)
Prior art keywords
strand
hydraulic cylinder
force
strand guide
pressure
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.)
Ceased
Application number
PCT/EP2009/001309
Other languages
German (de)
English (en)
Inventor
Axel Weyer
Christian Geerkens
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 Siemag AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of WO2009115174A1 publication Critical patent/WO2009115174A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the present invention relates to a strand guiding device for guiding a strand in the form of thick slabs, slabs, thin slabs, blocks or Vorprofilen carbon steel, stainless steel or stainless steel from a mold in a continuous casting.
  • Strand guide devices of the type mentioned are basically known in the art, for. Example from the European patent EP 0 902 734 B1 or the German patent application DE 10 2005 051 051 A1. Both documents disclose a strand guiding device for guiding a steel strand after leaving a mold in a continuous casting plant.
  • the strand guiding devices each comprise a strand guiding element, at least one hydraulic cylinder for adjusting the strand guiding element, a regulating device and a valve device for actuating the hydraulic cylinder in response to control signals of the regulating device.
  • the control device is used to carry out a position control of the hydraulic cylinder or the strand guiding element coupled thereto.
  • the invention has the object, a known strand guiding device and in particular a control device contained therein and a method for operating the strand guiding device to the effect that they are suitable for a plurality of alternative uses.
  • the strand guiding device is characterized in that its regulating device is designed to control the Course of the actual Anstellkraft of the hydraulic cylinder and the strand guide element against the strand to a predetermined course of the desired Anstellkraft.
  • the term "strand" in the present description represents thick slabs, slabs, thin slabs, blocks, billets or pre-profiles, the latter in the form of Beam Blank BBL formats, these are, for example, precursors for double-T beams , or in the form of round profile formats
  • the strand can be made of carbon steel, stainless steel or stainless steel.
  • the present invention is limited to the use of directional control valves as actuators between the control device and the hydraulic cylinder; Other types of valves are expressly not used in the present invention.
  • the claimed force control in conjunction with the directional control valve device allows a plurality of applications generally in the metallurgical industry, such. B. to promote the strand or the cold strand, to carry out a soft reduction or to detect the position of the sump tip within the cooling strand.
  • the claimed combination of force control and directional valves allows the control of a resultant piston force (double-sided cylinder chamber pressure control, all 4 individual valves are used here), or optionally the control of a single cylinder chamber force (or chamber pressure without Consideration of existing counteracting 2'ts cylinder chamber force).
  • This circuit variation thus allows a targeted hydraulic loading of the cylinder chambers (pressure or force) z.
  • B. in case of failure, in case of security, or in case of failure of the required pressure sensors.
  • a targeted / positive Cherte setting a cylinder chamber effect or a cylinder acting direction is thus made possible.
  • Directional control valves have the advantage that they are more robust than control valves; In particular, the quality of the oil or the purity of the oil may be worse than with control valves.
  • directional valves allow the setting of a controlled and fixed control function, eg. As the setting of a locking position without electrical / mechanical tension or setting a defined pressure-force situation on the hydraulic cylinder when driving the individual directional control valves when they are connected in a bridge circuit.
  • the directional valves are characterized by easy maintenance and servicing, in particular, no specially trained personnel is required.
  • directional control valves are cheaper than control valves.
  • the claimed force control offers the advantage that - except for special applications, such. B. for detecting the position of the sump tip - basically no position sensor are required.
  • the claimed force control When using the claimed force control to detect the position of the sump tip rollers and bearings are protected due to the respective predetermined force-target value from overloading. Nevertheless, contact between the rollers and the line is possible with regard to control (minimum force control).
  • the minimum force control ensures that - always with a guaranteed cooling - always a rotating role is present, which has contact with the surface of the strand, so that a strand guide is continuous.
  • Softeruction means a compression of the strand by only a small thickness reduction, eg. For example, by 1 to 2 mm in order to improve the quality of his structure by z. B. segregations can be prevented. Softer reduction is preferably carried out in the region of residual solidification, that is to say in the range from 30% to 100% of the sump length.
  • the strand guide element is formed as an employee driven or non-driven single role. In the case of slab plants, the single roll is positioned within a segment by means of separately placed trusses, while the individual rolls are employed directly in block plants. In the latter case, the individual roles are individual drivers or straightening units. There are a number of possible applications for the individual rollers in the abovementioned systems, which are briefly outlined below without any claim to completeness:
  • the force-controlled single roles can z. B. are used for a cold strand transport at a defined setting of a preferably constant force setpoint.
  • the force setpoint is preferably specified variably as a function of the format width.
  • the claimed force control is suitable for performing soft-reduction and for setting the corrective force.
  • the desired forces are also set variable, in these cases, however, process-dependent.
  • To detect the position of the sump tip of the force-soli value is given in the form of a jump function as described in one of the independent method claims.
  • the claimed force-controlled single roles are also suitable for the Ausfördem a strand; while a maximum force is set.
  • the strand guiding elements may also be segmental upper or lower frames each having a plurality of rollers.
  • these segment frames are generally employed against spacers and adjusted in this way to a fixed position / mouth width (applies only to slab systems).
  • the force control of the segment frame in slab plant advantageously allows the setting of various width-dependent hot strand set forces and the setting of Kaltstrangsoll oftenn.
  • the force control according to the invention allows both the individual rollers described in the penultimate paragraph and the segment frame described in the last paragraph, an adjustment of the respective Anstell characteristic to the predetermined desired forces.
  • the strand guiding device comprises at least one pressure sensor for detecting the pressure in the chambers of the hydraulic cylinder.
  • the pressure sensor can be arranged at any suitable location within the strand guide device;
  • the pressure sensor is preferably arranged directly on the hydraulic cylinder, in the pressure lines between the directional control valve device and the hydraulic cylinder, or directly on the directional control valve device.
  • the strand guiding device advantageously also comprises a conversion device for converting the detected pressure difference in the chambers of the hydraulic cylinder into an actual application force against the strand taking into account relevant effective surfaces for the pressure in the hydraulic cylinder.
  • the control device is advantageously designed in the form of a three-step controller, a higher-level controller or a controller with pulse width modulation.
  • the directional control valve device comprises at least four directional valves, which are connected in the form of a bridge circuit, wherein the bridge circuit is connected between a source and a sink for the hydraulic fluid for operating the hydraulic cylinder on its input side and the hydraulic raulikzylinder on its output side.
  • the bridge circuit can be constructed in a modular manner.
  • the bridge circuit advantageously allows one-sided pressurization of the piston in the hydraulic cylinder and thus a higher functionality.
  • the bridge circuit allows the setting of a defined pressure / force situation on the hydraulic cylinder.
  • the strand guiding device and the method for its operation for conveying the strand or the cold strand from the mold is used. It is advantageous if the predetermined course of the desired setting force with which the strand guide element is to press against the strand during a predetermined period of time, preferably during the entire period of strand guiding, is constant over time.
  • the claimed Strand actuators- device and the claimed method for their operation for the detection of the current position of the bottom tip of the strand can be used.
  • the claimed strand guiding device is operated as follows:
  • the described method for detecting the position of the sump tip can be part of a force-controlled soft-reduction.
  • FIG. 1 shows a strand guiding device according to the invention
  • FIG. 2 shows an embodiment of a directional control valve device in the form of a bridge circuit
  • the strand guiding device 100 has a hydraulic cylinder 120 with a piston 122 adjustably mounted therein.
  • the piston acts via a piston rod 124 and a strand guide
  • the piston 122 divides the hydraulic cylinder 120 into a cylinder space 126 and an annular cylinder space 128.
  • the pressure inside the cylinder space 126 is measured by means of a first pressure sensor 150-1, while the pressure in the annular cylinder space 128 by means of a second pressure sensor 150-2 is measured.
  • the pressure values determined by the first and second pressure sensors are compared within a control device 130 and converted by means of a conversion device 132 into a value for the resulting force with which the strand guide element 110 presses on the strand 200.
  • the conversion device 132 carries out this conversion, taking into account relevant effective areas for the pressure, in particular in the interior of the hydraulic cylinder.
  • the actual application force determined in this way by the conversion device 132 is subsequently compared with a predetermined desired application force in order to obtain a control deviation e for the adjustment force in this way.
  • the control device 130 calculates suitable control signals for a directional control valve device 140, in which FIG. 1 comprises only one directional control valve.
  • the directional control valve can be switched into three different states: "0", "1” and "2" with the aid of the control device 130.
  • the switching position "0" represents the so-called blocking position as shown in FIG. In the blocking position, the existing pressure lines 160-1, 160-2 to the hydraulic cylinder 120 and the pressure lines to the source Q and the sink S are each separated and locked.
  • the switching positions "1" and “2" each represent a passage position. More precisely, the switching position “1” causes a movement of the piston 122 and thus of the strand guide element 110 in Figure 1 to the left, that is away from the strand 200. The applied force on the strand is therefore in the switching position "1" less. In contrast, the switching position "2" causes a movement of the piston to the right, that is to say in the direction of the strand 200. The setting force is correspondingly increased.
  • FIG. 2 shows a bridge circuit of four-way valves 140'-1,... -4 as directional control valve device for controlling the hydraulic cylinder 120.
  • control device described above with reference to FIG. 1 regulates the actual measured contact force currently measured to the predefined setpoint application force.
  • This force control in combination with the downstream directional control valve device 140 is particularly well suited for a plurality of different applications, especially for conveying a strand or cold strand from a mold, for performing soft-reduction or for detecting the position of the sump tip of a not completely solidified strand.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

L'invention concerne un dispositif de guidage de barre destiné à guider une barre à la sortie de la lingotière dans une installation de coulée continue. Le dispositif de guidage de barre 100 comprend au moins un élément de guidage de barre 110, par exemple sous la forme d'un galet segmenté et au moins un vérin hydraulique 120 de positionnement de l'élément de guidage de barre. De plus, il comprend un dispositif de régulation 130 qui est monté en aval d'un dispositif de vannes multivoies 140 afin de piloter le vérin hydraulique 120. Afin de pouvoir utiliser un tel dispositif de guidage de barre 100 pour une pluralité de situations applicatives, le dispositif de régulation est conçu selon l'invention pour réguler la force de positionnement réelle du vérin hydraulique ou de l'élément de guidage de barre par rapport à la barre 200, la force de positionnement réelle étant régulée sur la base d'une force de positionnement de consigne prédéterminée.
PCT/EP2009/001309 2008-03-19 2009-02-24 Dispositif de guidage de barre et son procédé de fonctionnement Ceased WO2009115174A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008015008.8A DE102008015008B4 (de) 2008-03-19 2008-03-19 Verfahren zum Betreiben einer Strangführungseinrichtung
DE102008015008.8 2008-03-19

Publications (1)

Publication Number Publication Date
WO2009115174A1 true WO2009115174A1 (fr) 2009-09-24

Family

ID=40577855

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/001309 Ceased WO2009115174A1 (fr) 2008-03-19 2009-02-24 Dispositif de guidage de barre et son procédé de fonctionnement

Country Status (2)

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DE (1) DE102008015008B4 (fr)
WO (1) WO2009115174A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105014023A (zh) * 2015-06-26 2015-11-04 苏州洲盛非晶科技有限公司 超非晶带用高真空单辊甩带机
CN105772537A (zh) * 2016-05-10 2016-07-20 常州市雪龙机械制造有限公司 精密校平系统

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2206868A1 (de) * 1972-02-14 1973-08-23 Schloemann Ag Steuer- und regeleinrichtung zum foerdern und richten eines giesstranges waehrend und nach der erstarrung des fluessigen kerns
EP0025852A1 (fr) * 1979-09-07 1981-04-01 Sms Schloemann-Siemag Aktiengesellschaft Commande hydraulique d'un cylindre de réglage à injection double d'une installation de coulée continue
DE3822939C1 (en) * 1988-07-04 1989-10-05 Mannesmann Ag, 4000 Duesseldorf, De Continuous casting method for the production of slabs with a reduced thickness relative to the cast condition
DE3835010A1 (de) * 1988-10-14 1990-04-19 Rexroth Mannesmann Gmbh Vorrichtung zum abstuetzen und fuehren eines aus der kokille einer stranggussanlage austretenden stranges
WO1998050185A1 (fr) * 1997-05-07 1998-11-12 Mannesmann Ag Procede et dispositif de production de brames d'acier
DE19809807A1 (de) * 1998-03-09 1999-09-16 Schloemann Siemag Ag Anstellverfahren für ein Rollensegment einer Stranggießanlage
DE19836843A1 (de) * 1998-08-14 2000-02-17 Schloemann Siemag Ag Vorrichtung zum hydraulischen Anstellen der Rollen von Strangführungssegmenten einer Stranggießanlage
DE19960792A1 (de) * 1999-01-15 2000-08-17 Voest Alpine Ind Anlagen Stranggiesskokille
DE10160636A1 (de) * 2000-12-12 2002-07-18 Voest Alpine Ind Anlagen Verfahren zum Einstellen eines Gießspaltes an einer Strangführung einer Stranggießanlage
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT404807B (de) 1996-05-08 1999-03-25 Voest Alpine Ind Anlagen Stellvorrichtung zur einrichtung der lage von strangstützelementen
DE102005051051A1 (de) 2005-10-25 2007-04-26 Sms Demag Ag Verfahren zum Betreiben eines Anstellsystems zum Anstellen eines Stranges in einer Stranggießanlage

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2206868A1 (de) * 1972-02-14 1973-08-23 Schloemann Ag Steuer- und regeleinrichtung zum foerdern und richten eines giesstranges waehrend und nach der erstarrung des fluessigen kerns
EP0025852A1 (fr) * 1979-09-07 1981-04-01 Sms Schloemann-Siemag Aktiengesellschaft Commande hydraulique d'un cylindre de réglage à injection double d'une installation de coulée continue
DE3822939C1 (en) * 1988-07-04 1989-10-05 Mannesmann Ag, 4000 Duesseldorf, De Continuous casting method for the production of slabs with a reduced thickness relative to the cast condition
DE3835010A1 (de) * 1988-10-14 1990-04-19 Rexroth Mannesmann Gmbh Vorrichtung zum abstuetzen und fuehren eines aus der kokille einer stranggussanlage austretenden stranges
WO1998050185A1 (fr) * 1997-05-07 1998-11-12 Mannesmann Ag Procede et dispositif de production de brames d'acier
DE19809807A1 (de) * 1998-03-09 1999-09-16 Schloemann Siemag Ag Anstellverfahren für ein Rollensegment einer Stranggießanlage
DE19836843A1 (de) * 1998-08-14 2000-02-17 Schloemann Siemag Ag Vorrichtung zum hydraulischen Anstellen der Rollen von Strangführungssegmenten einer Stranggießanlage
DE19960792A1 (de) * 1999-01-15 2000-08-17 Voest Alpine Ind Anlagen Stranggiesskokille
DE10160636A1 (de) * 2000-12-12 2002-07-18 Voest Alpine Ind Anlagen Verfahren zum Einstellen eines Gießspaltes an einer Strangführung einer Stranggießanlage
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

Also Published As

Publication number Publication date
DE102008015008B4 (de) 2024-02-01
DE102008015008A1 (de) 2009-09-24

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