EP1249288B1 - Verfahren zur Kontrolle der Antriebskräfte bei Stranggiessanlagen - Google Patents
Verfahren zur Kontrolle der Antriebskräfte bei Stranggiessanlagen Download PDFInfo
- Publication number
- EP1249288B1 EP1249288B1 EP02006261A EP02006261A EP1249288B1 EP 1249288 B1 EP1249288 B1 EP 1249288B1 EP 02006261 A EP02006261 A EP 02006261A EP 02006261 A EP02006261 A EP 02006261A EP 1249288 B1 EP1249288 B1 EP 1249288B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- driving force
- forces
- individual
- maximum permissible
- force
- 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 15
- 238000009749 continuous casting Methods 0.000 title claims description 10
- 238000005266 casting Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
Definitions
- the invention relates to a method for controlling the driving forces of strand guide segments when conveying a cast strand from a continuous caster.
- the strands produced are from the mold to supported and guided at least for solidification in a roller corset. Separate Rolls within or behind this strand guide section become Overcoming the pull-out resistance which the strand passes through on its way the roller guide is driven.
- the performance of these drives will generally dimensioned so that, on the one hand, in every conceivable operating situation a safe discharge of the strand is guaranteed, but on the other hand the Manufacturing costs are kept as low as possible and the drives are not unnecessarily oversized become.
- Knowing the upcoming pull-out force, usually to overcome the pull-out resistance is required can be used for the evaluation of the operational Processes of a continuous caster are used.
- DE 29 23 900 C2 describes a method for preventing breakthroughs of the strand in continuous casting plants known, changes in the strand and the operating parameters of the continuous caster and measured with a limit value be compared, whereupon a signal for a countermeasure is exceeded is produced.
- Below the mold are the first segment of the strand guide the force changes in the pull-out forces caused by mechanical resistance measured and for a change in the casting process or its Termination used. The changes in force are measured using pressure cells or strain gauges.
- Document EP-A-1 193 007 describes a method and a device to determine the position of the final solidification in the casting strand during continuous casting of metals, especially steel, in which the one produced in the continuous casting mold Casting strand guided in support segments, cooled and through the support segments is pulled out with driven support roller pairs.
- the procedure concerns the control of the driving forces of the first strand guide segment.
- JP 03 254 343 A describes a method for measuring bulges of the strand during continuous casting. It suggests by calculation or measuring the torques of the motors with the respective drive rollers are connected to calculate the drive torques of the drive rollers. The Pulling force on the strand by drive rollers is obtained from the torques obtained calculated.
- the present invention is based on the object of changes to the To identify and analyze the driving forces of strand drives at an early stage determine their causes and take measures for a forward-looking, timely protection of the system against excessive wear resulting in a prolonged failure, for which in particular that occurring in the casting direction mechanical resistance of the segments against the driving forces shall be.
- the invention is based on a method for controlling the driving forces Strand guide segments when conveying a cast strand out of one Continuous casting machine, with a maximum permissible driving force for conveying of the strand is specified and the individual driving forces of a number of Measured segments, from which the sum of the individual forces is calculated, this is compared with the maximum permissible driving force and when it is exceeded the system is shut down or switched off. It is under the maximum permissible driving force, the maximum permissible strand resistance and the individual driving force means the individual resistance.
- the invention provides that for a single segment the maximum permissible driving force is specified and with the current driving force until the maximum permissible driving force (resistance) is reached. Beyond that there will be increases in driving force systemically prevented.
- the maximum permissible driving force is specified with the current driving force compared and if they are exceeded this is reduced until it at least match.
- FIGS. 1 and 2 shows the cast strand 1 which is guided through the rollers 2 with their bearings 3 according to FIG. 1 in a vertical plane and according to FIG. 2 in a horizontal plane.
- the bearings 3 of the rollers 2 are fastened to frames 4 and 5, which in turn are supported with brackets 6 on the outer supporting structures 8 of the supporting frame.
- Load cells 7 are arranged between the supports 6 and 8, which directly and precisely record the contact force of the segments.
- the contact force of the segments is however a deformation of the support brackets 6, 8 for example by means of inclinometers 9.
- the pull-out force of the strand 1 in the casting direction is transmitted directly from the strand guide segments to a number of support points of the device.
- a total force is formed corresponding to the sections of the strand guide segments, the pull-out force of a strand guide element acting in the casting direction according to FIG. 1 in the area of vertical guidance, whereas in the case of arc continuous casting plants, a corresponding angle must be taken into account in the further evaluation and arrangement of the measuring technology.
- an inclination measurement is installed under the support of the strand guide segments.
- the measuring method involves inclination measurement using an inclinometer on the substructure the support points of the strand guide segments.
- the inclination measurement shows the deformation of the substructure depending on the forthcoming discharge force.
- the measurement of the normal slope takes place during the casting break, d. H. without hot strand in the continuous caster.
- measurements in the foundry are used to determine the pull-out force.
- the inclination values are converted into a pull-out force with the corresponding design-dependent conversion factors.
- the measurement can be taken on all four Points can be done, but it can also be two or even one Limit point.
- the conversion of the measured variable can be done accordingly the geometric conditions or according to the location of the Main force axis can be converted accordingly.
- the invention is particularly suitable for monitoring the pull-out forces in the casting operation.
- the invention enables active machine protection in the event of overload, z. B. if the strand shell breaks. With the help of the invention Monitoring the pull-out forces protects the system from destruction.
- the power of the string drives can be limited. A set one Maximum force of the strand guide elements is monitored and switches in the additional control logic, the line drives automatically when starting from. Overall, using the monitoring method according to the invention the design criteria of the continuous casting plant during operation and at any time be checked.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
Description
- Figur 1
- in Ansicht ein Strangführungssegment der vertikalen Strangführung unterhalb der Kokille;
- Figur 2
- das Strangführungssegment gemäß Fig. 1 im Schnitt einer zum Gussstrang senkrechten Ebene.
Die Lager 3 der Rollen 2 sind auf Rahmen 4 und 5 befestigt, welche sich ihrerseits mit Konsolen 6 auf den äußeren Tragkonstruktionen 8 des Stützgerüstes abstützen. Zwischen den Auflagem 6 und 8 sind Kraftmessdosen 7 angeordnet, welche die Auflagekraft der Segmente unmittelbar und exakt erfassen.
Bei der zur Anwendung gelangenden Messmethode wird unter den Auflagen der Strangführungssegmente eine Neigungsmessung installiert.
Claims (3)
- Verfahren zur Kontrolle der Antriebskräfte von Strangführungssegmenten beim Ausfördern eines Gussstranges aus einer Stranggießanlage, wobei eine höchstzulässige Antriebskraft zum Ausfördem des Stranges vorgegeben wird und die Einzel-Antriebskräfte einer Anzahl von Segmenten gernessen und daraus die Summe der einzelnen Kräfte errechnet wird, diese mit der höchstzulässigen Antriebskraft verglichen wird und bei deren Überschreitung die Anlage zurückgefahren oder abgeschaltet wird,
dadurch gekennzeichnet, dass mittels Inklinometer zunächst die Normalneigung an den Unterbaukonstruktionen der Auflagepunkte der Strangführungssegmente ohne Strang gemessen wird und nachfolgend weitere Neigungsmessungen während des Gießbetriebes durchgeführt werden,
und dass die Differenzen der Neigungswerte über konstruktionsbedingte Umrechnugnsfaktoren, bedingt durch Verformung der konstruktiven Trageeinrichtung durch Krafteinwirkung, die anstehenden Ausziehkräfte, also die Einzelwiderstände und somit die Einzel-Antriebskräfte angeben. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass für ein einzelnes Segment die höchstzulässige Antriebskraft vorgegeben und mit der aktuellen Antriebskraft so lange verglichen wird, bis die höchstzulässige Antriebskraft bzw. Widerstand erreicht ist. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass für ein einzelnes Segment die höchstzulässige Antriebskraft vorgegeben, mit der aktuellen Einzel-Antriebskraft verglichen, und bei deren Überschreitung diese so weit rückgeführt wird, dass sie zumindest übereinstimmen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10118097 | 2001-04-11 | ||
DE10118097A DE10118097A1 (de) | 2001-04-11 | 2001-04-11 | Verfahren und Vorrichtung zur Kontrolle der Antriebskräfte bei Stranggießanlagen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1249288A2 EP1249288A2 (de) | 2002-10-16 |
EP1249288A3 EP1249288A3 (de) | 2002-12-18 |
EP1249288B1 true EP1249288B1 (de) | 2004-10-06 |
Family
ID=7681239
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02006261A Expired - Lifetime EP1249288B1 (de) | 2001-04-11 | 2002-03-20 | Verfahren zur Kontrolle der Antriebskräfte bei Stranggiessanlagen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1249288B1 (de) |
AT (1) | ATE278491T1 (de) |
DE (2) | DE10118097A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008004910A1 (de) * | 2008-01-18 | 2009-07-23 | Sms Demag Ag | Überlastüberwachung von Strangführungselementen |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2923900C2 (de) * | 1979-06-13 | 1984-09-13 | Hoesch Werke Ag, 4600 Dortmund | Verfahren zum Verhindern von Durchbrüchen des Strangs in Stranggießanlagen |
JP2849152B2 (ja) * | 1990-03-05 | 1999-01-20 | 日新製鋼株式会社 | 連続鋳造機におけるバルジング量の測定方法及びバルジングの抑制方法 |
DE10007706A1 (de) * | 2000-02-19 | 2001-08-23 | Sms Demag Ag | Verfahren und Anlage zum Gießen von Vorprodukten in einer Stranggießanlage |
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 |
-
2001
- 2001-04-11 DE DE10118097A patent/DE10118097A1/de not_active Withdrawn
-
2002
- 2002-03-20 AT AT02006261T patent/ATE278491T1/de not_active IP Right Cessation
- 2002-03-20 EP EP02006261A patent/EP1249288B1/de not_active Expired - Lifetime
- 2002-03-20 DE DE50201188T patent/DE50201188D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50201188D1 (de) | 2004-11-11 |
ATE278491T1 (de) | 2004-10-15 |
DE10118097A1 (de) | 2002-10-17 |
EP1249288A2 (de) | 2002-10-16 |
EP1249288A3 (de) | 2002-12-18 |
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