EP0992303B1 - Method for withdrawing a cast strand and arc-type continuous casting machine therefor - Google Patents
Method for withdrawing a cast strand and arc-type continuous casting machine therefor Download PDFInfo
- Publication number
- EP0992303B1 EP0992303B1 EP99116308A EP99116308A EP0992303B1 EP 0992303 B1 EP0992303 B1 EP 0992303B1 EP 99116308 A EP99116308 A EP 99116308A EP 99116308 A EP99116308 A EP 99116308A EP 0992303 B1 EP0992303 B1 EP 0992303B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal strip
- guide roller
- speed
- segment
- strip
- 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 10
- 238000009749 continuous casting Methods 0.000 title claims abstract 7
- 239000002184 metal Substances 0.000 claims abstract description 99
- 238000005266 casting Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 5
- 238000007665 sagging Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000007257 malfunction Effects 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
- B22D11/1282—Vertical casting and curving the cast stock to the horizontal
-
- 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 present invention relates to a strand withdrawal method for a metal strip cast in a continuous sheet caster, in particular a steel band, the metal band first of all with a an input speed driven arc input segment is withdrawn vertically from a casting mold, the metal strip an arc shape is embossed in the arc entrance segment, so that the metal band runs into an arc, the metal band after reaching a horizontal tape running direction from one with an output speed driven sheet output segment straightened and fed out of the sheet exit segment with the metal band between the arc entry segment and the arc output segment is initially arranged on a circular arc Reaction role and then guided over a guide role is, as well as a corresponding continuous sheet caster.
- Such a strand withdrawal process or such a continuous sheet casting installation are from the company SMS Schloemann-Siemag distributed as so-called CSP systems.
- CSP systems Thin slabs cast with a strip thickness between 40 mm and 150 mm.
- the metal strip is made from a casting mold deducted vertically. After that, the metal strip is driven by a Arch input segment (bending driver) stamped an arch shape. After reaching a horizontal belt running direction that will Metal strip from a driven sheet exit segment (pull-out direction driver) straightened.
- the metal band runs between the two drivers exactly circular arc.
- this ahead of both drivers act on the metal strip at exactly the same speed. Differences in speeds either cause one tendon-shaped course or a sack-like sagging of the metal band between the two drivers. Sagging can be mechanical be counteracted by the fact that a reaction role and an additional guide roller supports the metal band from below.
- Deviations of the metal strip from its ideal line can Malfunctions can lead to the casting being stopped. Speed differences must therefore be corrected immediately in order to Deviations of the metal strip from its ideal line as far as possible to avoid.
- the metal band should at least a roll arranged on the circular arc roll firmly to the total course of the metal strip and thus also the entire continuous sheet caster increased stability and increased synchronization to rent.
- the object of the present invention is a strand withdrawal method and a corresponding continuous sheet caster to make available, by means of which the metal band with sufficient accuracy is guided on its ideal line and Deviations from the ideal line are sure to be on time are detectable that the deviations are counteracted can.
- the task is solved for the strand withdrawal process in that the guide roller is arranged below the arc that a Applying the metal tape to the guide roller or lifting it off of the metal strip is gripped by the guide roller and that the Initial speed when the metal band is applied to the Guide roller increased and when lifting the metal strip from the Leadership role is lowered.
- the object is achieved in that the guide roller is arranged below the arc that the Guide roller has a detection device, by means of which the metal tape lies against the guide roller or is lifted off of the metal strip can be detected by the guide roller, and that the Detection device with a control element in operative connection stands, by means of which the output drive corresponding to the application the metal strip to the guide roller or lifting the Metal strip can be controlled by the guide roller.
- the guide roller rotates at a peripheral speed. If the circumferential speed is the metal band on the guide roller necessarily equal to the input speed. It it is therefore possible for the metal strip to lie against the guide roller is detected when the difference in peripheral speed a predetermined speed barrier to the input speed falls below, and that on lifting the metal strip recognized by the leadership role when the difference the peripheral speed to the input speed the predetermined Speed limit exceeded.
- the detection device can be, for example, as Speed sensor for detecting a peripheral speed the leadership role.
- the metal band lies on the guide roller, it exercises one Contact force on the guide roller. It is therefore also possible that recognized on the metal tape on the guide roller if the contact force exceeds a predetermined force barrier, and that on lifting the metal strip from the guide roller is detected when the applied force is the predetermined force barrier below.
- the detection device can act as a contact force sensor to detect a contact force with which the metal strip abuts the guide roller, be formed.
- a Metal strip 1 here a steel strip 1, castable.
- the metal strip 1 has a strip thickness between 40 mm and 150 mm.
- a so-called Thin slab caster At the continuous sheet caster 1 is a so-called Thin slab caster.
- the continuous sheet caster has a casting mold 2 on.
- An arc entry segment 3 is arranged below the casting mold.
- the arc input segment 3 is from an input drive system 4 controlled such that it with the metal strip 1 an input speed ve perpendicular from the casting mold 2 subtracts and impresses an arc shape on the metal strip 1.
- the metal band 1 therefore runs when leaving the sheet entry segment 3 into an arc.
- a reaction roller 5 is located below the arc input segment 3 arranged.
- the reaction roller 5 in turn is a leadership role 6 subordinate.
- the guide roller 6 is an arc exit segment 7 subordinate.
- the sheet exit segment 7 is speed controllable Output drive system 8 driven.
- the sheet exit segment 7 aligns the metal strip 1 after reaching it a horizontal tape running direction x straight again. Further promotes it the metal strip 1 at an initial speed va from the Arch output segment 7 from.
- the guide roller 6 is not on the arc, but below the Arranged circular arc.
- the distance of the guide roller 6 from the arc is between 5 cm and 15 cm.
- the Guide roller 6 has a detection device 9.
- the detection device 9 is in the present case as a speed sensor educated.
- the detection device 9 can be used to detect at what peripheral speed vu the guide roller 6 rotates. If the difference in peripheral speed vu to Input speed ve a predetermined speed limit falls below, is applied by a control element 10 of the metal strip 1 to the guide roller 6 recognized. If on the other hand, the difference between the peripheral speed vu and the input speed ve exceeds the predetermined speed limit, is from the control element 10 on lifting the metal strip 1 recognized by the guide roller 6.
- the Metal strip 1 to the guide roller 6 or the lifting of the metal strip 1 can be captured by the guide roller 6. So can also by specifying a corresponding setpoint va * to the output drive system 8 the starting speed especially when putting on of the metal strip 1 to the guide roller and when lifting the Metal strip 1 are lowered by the guide roller 6.
- the detection device 9 can also be used as a contact force sensor be trained.
- the metal tape 1 against the guide roller 6 can be detected when the applied force is a predetermined force barrier exceeds.
- the metal strip can be lifted off 1 can be recognized by the guide roller 6 when the contact force falls below a predetermined force barrier.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Radiography Using Non-Light Waves (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Strangabzugsverfahren für ein in einer Bogenstranggießanlage gegossenes Metallband, insbesondere ein Stahlband, wobei das Metallband zunächst von einem mit einer Eingangsgeschwindigkeit angetriebenen Bogeneingangssegment senkrecht aus einer Gießkokille abgezogen wird, wobei dem Metallband im Bogeneingangssegment eine Bogenform aufgeprägt wird, so daß das Metallband in einen Kreisbogen einläuft, wobei das Metallband nach Erreichen einer waagerechten Bandlaufrichtung von einem mit einer Ausgangsgeschwindigkeit angetriebenen Bogenausgangssegment gerade gerichtet und aus dem Bogenausgangssegment ausgefördert wird, wobei das Metallband zwischen dem Bogeneingangssegment und dem Bogenausgangssegment zunächst über eine am Kreisbogen angeordnete Reaktionsrolle und sodann über eine Führungsrolle geführt wird, sowie eine hiermit korrespondierende Bogenstranggießanlage.The present invention relates to a strand withdrawal method for a metal strip cast in a continuous sheet caster, in particular a steel band, the metal band first of all with a an input speed driven arc input segment is withdrawn vertically from a casting mold, the metal strip an arc shape is embossed in the arc entrance segment, so that the metal band runs into an arc, the metal band after reaching a horizontal tape running direction from one with an output speed driven sheet output segment straightened and fed out of the sheet exit segment with the metal band between the arc entry segment and the arc output segment is initially arranged on a circular arc Reaction role and then guided over a guide role is, as well as a corresponding continuous sheet caster.
Ein derartiges Strangabzugsverfahren bzw. eine derartige Bogenstranggießanlage werden bspw. von der Firma SMS Schloemann-Siemag als sogenannte CSP-Anlagen vertrieben. Mit CSP-Anlagen werden Dünnbrammen mit einer Banddicke zwischen 40 mm und 150 mm gegossen.Such a strand withdrawal process or such a continuous sheet casting installation are from the company SMS Schloemann-Siemag distributed as so-called CSP systems. With CSP systems Thin slabs cast with a strip thickness between 40 mm and 150 mm.
Bei Bogenstranggießanlagen wird das Metallband aus einer Gießkokille senkrecht abgezogen. Danach wird dem Metallband von einem angetriebenen Bogeneingangssegment (Biegetreiber) eine Bogenform aufgeprägt. Nach Erreichen einer waagerechten Bandlaufrichtung wird das Metallband von einem angetriebenen Bogenausgangssegment (Auszieh-Richttreiber) gerade gerichtet.In continuous sheet casting machines, the metal strip is made from a casting mold deducted vertically. After that, the metal strip is driven by a Arch input segment (bending driver) stamped an arch shape. After reaching a horizontal belt running direction that will Metal strip from a driven sheet exit segment (pull-out direction driver) straightened.
Im Idealfall verläuft das Metallband zwischen den beiden Treibern exakt kreisbogenförmig. Dies setzt u.a. voraus, daß beide Treiber mit exakt gleicher Geschwindigkeit auf das Metallband wirken. Unterschiede in den Geschwindigkeiten verursachen entweder einen sehnenförmigen Verlauf oder ein sackartiges Durchhängen des Metallbandes zwischen den beiden Treibern. Dem Durchhängen kann mechanisch dadurch entgegengewirkt werden, daß eine Reaktionsrolle und eine zusätzliche Führungsrolle das Metallband von unten stützen.Ideally, the metal band runs between the two drivers exactly circular arc. Among other things, this ahead of both drivers act on the metal strip at exactly the same speed. Differences in speeds either cause one tendon-shaped course or a sack-like sagging of the metal band between the two drivers. Sagging can be mechanical be counteracted by the fact that a reaction role and an additional guide roller supports the metal band from below.
Abweichungen des Metallbandes von seiner Ideallinie können zu Betriebsstörungen bis hin zum Gießabbruch führen. Geschwindigkeitsunterschiede müssen daher unverzüglich ausgeregelt werden, um Abweichungen des Metallbandes von seiner Ideallinie so weit wie möglich zu vermeiden. Ferner sollte das Metallband an mindestens einer am Kreisbogen angeordneten Rolle fest abrollen, um dem Gesamtverlauf des Metallbandes und damit auch der gesamten Bogenstranggießanlage eine erhöhte Stabilität und einen erhöhten Gleichlauf zu verleihen.Deviations of the metal strip from its ideal line can Malfunctions can lead to the casting being stopped. Speed differences must therefore be corrected immediately in order to Deviations of the metal strip from its ideal line as far as possible to avoid. Furthermore, the metal band should at least a roll arranged on the circular arc roll firmly to the total course of the metal strip and thus also the entire continuous sheet caster increased stability and increased synchronization to rent.
Die Aufgabe der vorliegenden Erfindung besteht darin, ein Strangabzugsverfahren und eine hiermit korrespondierende Bogenstranggießanlage zur Verfügung zu stellen, mittels derer das Metallband mit hinreichender Genauigkeit auf seiner Ideallinie geführt wird und Abweichungen von der Ideallinie mit Sicherheit so rechtzeitig detektierbar sind, daß den Abweichungen entgegengewirkt werden kann.The object of the present invention is a strand withdrawal method and a corresponding continuous sheet caster to make available, by means of which the metal band with sufficient accuracy is guided on its ideal line and Deviations from the ideal line are sure to be on time are detectable that the deviations are counteracted can.
Die Aufgabe wird für das Strangabzugsverfahren dadurch gelöst, daß die Führungsrolle unterhalb des Kreisbogens angeordnet ist, daß ein Sichanlegen des Metallbandes an die Führungsrolle bzw. ein Abheben des Metallbandes von der Führungsrolle erfaßt wird und daß die Ausgangsgeschwindigkeit beim Sichanlegen des Metallbandes an die Führungsrolle erhöht und beim Abheben des Metallbandes von der Führungsrolle erniedrigt wird.The task is solved for the strand withdrawal process in that the guide roller is arranged below the arc that a Applying the metal tape to the guide roller or lifting it off of the metal strip is gripped by the guide roller and that the Initial speed when the metal band is applied to the Guide roller increased and when lifting the metal strip from the Leadership role is lowered.
Für die Bogenstranggießanlage wird die Aufgabe dadurch gelöst, daß die Führungsrolle unterhalb des Kreisbogens angeordnet ist, daß die Führungsrolle eine Erfassungseinrichtung aufweist, mittels derer ein Sichanlegen des Metallbandes an die Führungsrolle bzw. Abheben des Metallbandes von der Führungsrolle erfaßbar ist, und daß die Erfassungseinrichtung mit einem Steuerelement in Wirkverbindung steht, mittels dessen der Ausgangsantrieb entsprechend dem Sichanlegen des Metallbandes an die Führungsrolle bzw. dem Abheben des Metallbandes von der Führungsrolle ansteuerbar ist.For the continuous sheet caster, the object is achieved in that the guide roller is arranged below the arc that the Guide roller has a detection device, by means of which the metal tape lies against the guide roller or is lifted off of the metal strip can be detected by the guide roller, and that the Detection device with a control element in operative connection stands, by means of which the output drive corresponding to the application the metal strip to the guide roller or lifting the Metal strip can be controlled by the guide roller.
Mit dem erfindungsgemäßen Strangabzugsverfahren bzw. der erfindungsgemäßen Bogenstranggießanlage läßt man also das Metallband in einem Toleranzbereich definiert durchhängen. Dieses geringfügige Durchhängen beeinflußt weder den Gießprozeß noch die Qualität des erzeugten Metallbandes. Als entscheidenden Vorteil erreicht man aber, daß bei einer zu hohen Ausgangsgeschwindigkeit, wenn also das Metallband versucht, einen sehnenförmigen Verlauf anzunehmen, das Metallband zuerst von der Führungsrolle abhebt und erst später von der Reaktionsrolle abheben würde. Bereits das Abheben von der Führungsrolle wird aber detektiert, so daß die Ausgangsgeschwindigkeit rechtzeitig vor dem Abheben des Metallbandes von der Reaktionsroile nachgeführt werden kann.With the strand draw-off method according to the invention or the one according to the invention Continuous sheet caster is therefore left in the metal strip sag defined tolerance range. This slight Sagging does not affect the casting process or the quality of the generated metal strip. The decisive advantage is achieved but that if the output speed is too high, if so Metal tape tries to assume a tendon-shaped course that First the metal band lifts off the guide roller and only later from the reaction roll would take off. Already taking off from the Leading role is detected, however, so that the output speed in good time before lifting the metal strip from the reaction tube can be tracked.
Die Führungsrolle rotiert mit einer Umfangsgeschwindigkeit. Wenn das Metallband an der Führungsrolle anliegt, ist die Umfangsgeschwindigkeit zwangsweise gleich der Eingangsgeschwindigkeit. Es ist daher möglich, daß auf Sichanlegen des Metallbandes an die Führungsrolle erkannt wird, wenn die Differenz der Umfangsgeschwindigkeit zur Eingangsgeschwindigkeit eine vorbestimmte Geschwindigkeitsschranke unterschreitet, und daß auf Abheben des Metallbandes von der Führungsrolle erkannt wird, wenn die Differenz der Umfangsgeschwindigkeit zur Eingangsgeschwindigkeit die vorbestimmte Geschwindigkeitsschranke überschreitet.The guide roller rotates at a peripheral speed. If the circumferential speed is the metal band on the guide roller necessarily equal to the input speed. It it is therefore possible for the metal strip to lie against the guide roller is detected when the difference in peripheral speed a predetermined speed barrier to the input speed falls below, and that on lifting the metal strip recognized by the leadership role when the difference the peripheral speed to the input speed the predetermined Speed limit exceeded.
Hiermit korrespondierend kann die Erfassungseinrichtung bspw. als Geschwindigkeitssensor zum Erfassen einer Umfangsgeschwindigkeit der Führungsrolle ausgebildet sein.Corresponding to this, the detection device can be, for example, as Speed sensor for detecting a peripheral speed the leadership role.
Wenn das Metallband auf der Führungsrolle aufliegt, übt es eine Anliegekraft auf die Führungsrolle aus. Es ist daher auch möglich, daß auf Sichanlegen des Metallbandes an die Führungsrolle erkannt wird, wenn die Anliegekraft eine vorbestimmte Kraftschranke überschreitet, und daß auf Abheben des Metallbandes von der Führungsrolle erkannt wird, wenn die Anliegekraft die vorbestimmte Kraftschranke unterschreitet.If the metal band lies on the guide roller, it exercises one Contact force on the guide roller. It is therefore also possible that recognized on the metal tape on the guide roller if the contact force exceeds a predetermined force barrier, and that on lifting the metal strip from the guide roller is detected when the applied force is the predetermined force barrier below.
Hiermit korrespondierend kann die Erfassungseinrichtung als Anliegekraftsensor zum Erfassen einer Anliegekraft, mit der das Metallband an der Führungsrolle anliegt, ausgebildet sein.Corresponding to this, the detection device can act as a contact force sensor to detect a contact force with which the metal strip abuts the guide roller, be formed.
Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei zeigt in Prinzipdarstellung die einzige
- Figur 1
- eine Bogenstranggießanlage für ein Metallband.
- Figure 1
- a continuous caster for a metal strip.
Mittels der in Fig. 1 dargestellten Bogenstranggießanlage ist ein Metallband 1, hier ein Stahlband 1, gießbar. Das Metallband 1 weist dabei eine Banddicke zwischen 40 mm und 150 mm auf. Bei der Bogenstranggießanlage gemäß Fig. 1 handelt es sich somit um eine sogenannte Dünnbrammengießanlage.By means of the continuous sheet caster shown in Fig. 1 is a Metal strip 1, here a steel strip 1, castable. The metal strip 1 has a strip thickness between 40 mm and 150 mm. At the continuous sheet caster 1 is a so-called Thin slab caster.
Gemäß Fig. 1 weist die Bogenstranggießanlage eine Gießkokille 2
auf. Unterhalb der Gießkokille ist ein Bogeneingangssegment 3 angeordnet.
Das Bogeneingangssegment 3 wird von einem Eingangs-Antriebssystem
4 derart angesteuert, daß es das Metallband 1 mit
einer Eingangsgeschwindigkeit ve senkrecht aus der Gießkokille 2
abzieht und dem Metallband 1 eine Bogenform aufprägt. Das Metallband
1 läuft folglich beim Verlassen des Bogeneingangssegments 3
in einen Kreisbogen ein.1, the continuous sheet caster has a
Unterhalb des Bogeneingangssegments 3 ist eine Reaktionsrolle 5
angeordnet. Der Reaktionsrolle 5 wiederum ist eine Führungsrolle
6 nachgeordnet. Der Führungsrolle 6 ist ein Bogenausgangssegment
7 nachgeordnet. Das Bogenausgangssegment 7 ist mittels eines geschwindigkeitssteuerbaren
Ausgangs-Antriebssystems 8 angetrieben.
Das Bogenausgangssegment 7 richtet das Metallband 1 nach Erreichen
einer waagerechten Bandlaufrichtung x wieder gerade. Ferner fördert
es das Metallband 1 mit einer Ausgangsgeschwindigkeit va aus dem
Bogenausgangssegment 7 aus.A reaction roller 5 is located below the arc input segment 3
arranged. The reaction roller 5 in turn is a leadership role
6 subordinate. The guide roller 6 is an arc exit segment
7 subordinate. The sheet exit segment 7 is speed controllable
Wenn das Metallband 1 mittel der Bogensegmente 3, 7 auf seiner Ideallinie gehalten wird, liegt es exakt an der Reaktionsrolle 5 an. Die Reaktionsrolle 5 ist also am Kreisbogen angeordnet. Wenn aber die Ausgangsgeschwindigkeit va größer ist als die Eingangsgeschwindigkeit ve, nimmt das Metallband 1 zwischen den Bogensegmenten 3, 7 einen sehnenförmigen Verlauf an. Es hebt also von der Reaktionsrolle 5 ab. Es ist zwar möglich, dieses Abheben des Metallbandes 1 von der Reaktionsrolle 5 zu detektieren und dem Abheben entgegenzuwirken. Dies erfordert jedoch aufwendige und schnelle Sensor- und Regelsysteme. Um ein schnelleres Reagieren auf Abweichungen des Metallbandes 1 von seiner Ideallinie zu ermöglichen, wird daher wie folgt vorgegangen:If the metal strip 1 middle of the arc segments 3, 7 on his Ideal line is held, it lies exactly on the reaction roller 5 on. The reaction roller 5 is thus arranged on the circular arc. If but the output speed va is greater than the input speed ve, takes the metal strip 1 between the arc segments 3, 7 a tendon-shaped course. So it lifts from the Reaction roll 5 from. It is possible to lift off the metal strip Detect 1 from the reaction roller 5 and lifting counteract. However, this requires elaborate and fast sensor and control systems. To respond faster To enable the metal strip 1 to deviate from its ideal line, is therefore carried out as follows:
Die Führungsrolle 6 ist nicht am Kreisbogen, sondern unterhalb des
Kreisbogens angeordnet. Der Abstand der Führungsrolle 6 vom Kreisbogen
beträgt dabei zwischen 5 cm und 15 cm. Ferner weist die
Führungsrolle 6 eine Erfassungseinrichtung 9 auf. Die Erfassungseinrichtung
9 ist im vorliegenden Fall als Geschwindigkeitssensor
ausgebildet. Mittels der Erfassungseinrichtung 9 kann erfaßt werden,
mit welcher Umfangsgeschwindigkeit vu die Führungsrolle 6
rotiert. Wenn die Differenz der Umfangsgeschwindigkeit vu zur
Eingangsgeschwindigkeit ve eine vorbestimmte Geschwindigkeitsschranke
unterschreitet, wird von einem Steuerelement 10 auf Sichanlegen
des Metallbandes 1 an die Führungsrolle 6 erkannt. Wenn
hingegen die Differenz der Umfangsgeschwindigkeit vu zur Eingangsgeschwindigkeit
ve die vorbestimmte Geschwindigkeitsschranke überschreitet,
wird von dem Steuerungselement 10 auf Abheben des Metallbandes
1 von der Führungsrolle 6 erkannt.The guide roller 6 is not on the arc, but below the
Arranged circular arc. The distance of the guide roller 6 from the arc
is between 5 cm and 15 cm. Furthermore, the
Guide roller 6 has a detection device 9. The detection device
9 is in the present case as a speed sensor
educated. The detection device 9 can be used to detect
at what peripheral speed vu the guide roller 6
rotates. If the difference in peripheral speed vu to
Input speed ve a predetermined speed limit
falls below, is applied by a
Mittels der Erfassungseinrichtung 9 kann also das Sichanlegen des
Metallbandes 1 an die Führungsrolle 6 bzw. das Abheben des Metallbandes
1 von der Führungsrolle 6 erfaßt werden. Somit kann auch
durch Vorgabe eines entsprechenden Sollwertes va* an das Ausgangs-Antriebssystem
8 die Ausgangsgeschwindigkeit va beim Sichanlegen
des Metallbandes 1 an die Führungsrolle erhöht und beim Abheben des
Metallbandes 1 von der Führungsrolle 6 erniedrigt werden.By means of the detection device 9, therefore, the
Metal strip 1 to the guide roller 6 or the lifting of the metal strip
1 can be captured by the guide roller 6. So can also
by specifying a corresponding setpoint va * to the
Alternativ kann die Erfassungseinrichtung 9 auch als Anliegekraftsensor ausgebildet sein. In diesem Fall wird eine Anliegekraft erfaßt, mit der das Metallband 1 an der Führungsrolle 6 anliegt bzw. die das Metallband 1 auf die Führungsrolle 6 ausübt. In diesem Fall kann auf Sichanlegen des Metallbandes 1 an die Führungsrolle 6 erkannt werden, wenn die Anliegekraft eine vorbestimmte Kraftschranke überschreitet. Umgekehrt kann auf Abheben des Metallbandes 1 von der Führungsrolle 6 erkannt werden, wenn die Anliegekraft die vorbestimmte Kraftschranke unterschreitet.Alternatively, the detection device 9 can also be used as a contact force sensor be trained. In this case there is a contact force detected with which the metal strip 1 rests on the guide roller 6 or which the metal strip 1 exerts on the guide roller 6. In this Case can on the metal tape 1 against the guide roller 6 can be detected when the applied force is a predetermined force barrier exceeds. Conversely, the metal strip can be lifted off 1 can be recognized by the guide roller 6 when the contact force falls below a predetermined force barrier.
Durch das Anordnen der Führungsrolle unterhalb des Kreisbogens wird also weiterhin sichergestellt, daß das Metallband 1 nur geringfügig durchhängen kann. Dadurch, daß das Metallband 1 aber nicht gleichzeitig, sondern nacheinander die Rollen 5, 6 kontaktiert bzw. den Kontakt von ihnen löst, wird aber ein Toleranzbereich für die Ausgangsgeschwindigkeit va geschaffen, innerhalb dessen das Metallband 1 den Kontakt mit der Reaktionsrolle 5 nicht verliert. By placing the guide roller below the circular arc thus also ensured that the metal strip 1 only slightly can sag. Because the metal strip 1 is not at the same time, but instead contacted the rollers 5, 6 or the Solves contact from them, but becomes a tolerance range for them Output speed va created, within which the metal strip 1 does not lose contact with the reaction roller 5.
- 11
- Stahlbandsteel strip
- 22
- GießkokilleGießkokille
- 33
- BogeneingangssegmentArch entrance segment
- 44
- Eingangs-AntriebssystemInput drive system
- 55
- Reaktionsrollereaction role
- 66
- Führungsrolleleadership
- 77
- BogenausgangssegmentCurved exit segment
- 88th
- Ausgangs-AntriebssystemOutput drive system
- 99
- Erfassungseinrichtungdetector
- 1010
- Steuerelementcontrol
- dd
- Abstanddistance
- vava
- Ausgangsgeschwindigkeitoutput speed
- va*va *
- Sollwertsetpoint
- veve
- Eingangsgeschwindigkeitinput speed
- vuvu
- Umfangsgeschwindigkeitcircumferential speed
- xx
- BandlaufrichtungTape direction
Claims (6)
- Strip withdrawal method for a metal strip (1) cast in a curved continuous casting plant, particularly a steel strip (1), wherein the metal strip (1) is initially withdrawn vertically from a casting chill mould (2) by a curve entry segment (3) driven at an entry speed (ve), wherein a curved shape is imposed on the metal strip (1) in the curve entry segment (3) so that the metal strip (1) runs in in an arc, wherein the metal strip (1) after attainment of a horizontal strip running direction (x) is aligned to be straight by a curve exit segment (7) driven at an exit speed (va) and is conveyed out of the curve exit segment (7), and wherein the metal strip (1) is guided between the curve entry segment (3) and the curve exit segment (7) additionally by way of a reaction roller (5) arranged at the arc and then by way of a guide roller (6), characterised in that the guide roller (6) is arranged below the arc, that a self-laying of the metal strip (1) against the guide roller (6) or a lifting-off of the metal strip (1) from the guide roller (6) is detected and that the exit speed (va) is increased in the case of self-laying of the metal strip (1) against the guide roller (6) and is reduced in the case of lifting-off of the metal strip (1) from the guide roller (6).
- Strip withdrawal method according to claim 1, characterised in that the guide roller (6) rotates at a circumferential speed (vu), that on self-laying of the metal strip (1) against the guide roller (6) it is recognised when the difference of the circumferential speed (vu) relative to the entry speed (ve) falls below a predetermined speed limit and that on lifting-off of the metal strip (1) from the guide roller (6) it is recognised when the difference of the circumferential speed (vu) relative to the entry speed (ve) exceeds the predetermined speed limit.
- Strip withdrawal method according to claim 1, characterised in that the metal strip (1) exerts a seating force on the guide roller (6), that on self-laying of the metal strip (1) against the guide roller (6) it is recognised when the seating force exceeds a predetermined force limit and that on lifting-off of the metal strip (1) from the guide roller (6) it is recognised when the seating force falls below the predetermined force limit.
- Curved continuous casting installation for casting a metal strip (1), particularly a steel strip (1), comprising a casting chill mould (2), a curve entry segment (3) arranged below the casting chill mould (2), by means of which the metal strip (1) is withdrawable vertically from the casting chill mould (2) and a curved shape can be imposed on the metal strip (1) so that the metal strip (1) on leaving the curve entry segment (3) runs-in in an arc, a reaction roller (5) arranged below the curve entry segment (3) at the arc, a guide roller (6) arranged downstream of the reaction roller (5), a curve exit segment (7) arranged downstream of the guide roller (6) and a speed-controllable exit drive (8), by means of which the metal strip (1) after attainment of a horizontal strip running direction (x) can be aligned to be straight and can be conveyed out of the curve exit segment (7), characterised in that the guide roller (6) is arranged below the arc, that the guide roller (6) has a detecting device (9) by means of which a self-laying of the metal strip (1) against the guide roller (6) or a lifting-off of the metal strip (1) from the guide roller (6) can be detected, and that the detecting device (9) is operatively connected with a control element (10) by means of which the exit drive (8) can be controllable in correspondence with the self-laying of the metal strip (1) against the guide roller (6) or the lifting-off of the metal strip (1) from the guide roller (6).
- Curved continuous casting installation according to claim 4, characterised in that the detecting device (9) is constructed as a speed sensor (9) for detection of a circumferential speed (vu) of the guide roller (6).
- Curved continuous casting installation according to claim 4, characterised in that the detecting device (9) is constructed as a seating force sensor for detection of a seating force by which the metal strip (1) bears against the guide roller (6).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19838774A DE19838774A1 (en) | 1998-08-26 | 1998-08-26 | Casting of steel strip comprises locating the guide roll below the circular arc section and detecting the break between strip and guide roll |
| DE19838774 | 1998-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0992303A1 EP0992303A1 (en) | 2000-04-12 |
| EP0992303B1 true EP0992303B1 (en) | 2003-06-25 |
Family
ID=7878771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99116308A Expired - Lifetime EP0992303B1 (en) | 1998-08-26 | 1999-08-19 | Method for withdrawing a cast strand and arc-type continuous casting machine therefor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6427758B1 (en) |
| EP (1) | EP0992303B1 (en) |
| AT (1) | ATE243588T1 (en) |
| DE (2) | DE19838774A1 (en) |
| ES (1) | ES2202974T3 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6648059B2 (en) * | 2001-02-22 | 2003-11-18 | Aktiebolaget Skf | Method for detecting a roller failure |
| DE102004002783A1 (en) * | 2004-01-20 | 2005-08-04 | Sms Demag Ag | Method and device for determining the position of the sump tip in the casting strand in the continuous casting of liquid metals, in particular of liquid steel materials |
| DE102005028703A1 (en) * | 2005-06-20 | 2006-12-28 | Siemens Ag | Method for controlling and / or controlling a Anstellsegmentes in a continuous casting and apparatus therefor |
| DE102007005778A1 (en) * | 2006-03-09 | 2007-09-13 | Sms Demag Ag | Continuous casting plant and method for operating a continuous casting plant |
| DE202015105526U1 (en) | 2015-10-19 | 2015-11-09 | Sms Group Gmbh | Minimal leveling unit for thin slab casting plants |
| WO2018152738A1 (en) * | 2017-02-23 | 2018-08-30 | 普锐特冶金技术日本有限公司 | Apparatus for continuous casting of thin sheet |
| US10850322B2 (en) | 2017-10-30 | 2020-12-01 | Nucor Corporation | Casting stand control system with radius roll feedback and method of use |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3478808A (en) * | 1964-10-08 | 1969-11-18 | Bunker Ramo | Method of continuously casting steel |
| US3344841A (en) * | 1965-06-18 | 1967-10-03 | Koppers Co Inc | Control apparatus for a continuous cast billet |
| AT378707B (en) * | 1983-01-11 | 1985-09-25 | Voest Alpine Ag | METHOD FOR MONITORING A CONTINUOUS CASTING PLANT |
| US4949777A (en) * | 1987-10-02 | 1990-08-21 | Kawasaki Steel Corp. | Process of and apparatus for continuous casting with detection of possibility of break out |
| WO1992018272A1 (en) * | 1991-04-19 | 1992-10-29 | Nippon Steel Corporation | Twin-roll thin sheet continuous casting method and apparatus therefor |
| DE4307464C2 (en) * | 1993-03-10 | 2001-04-12 | Sms Demag Ag | CSP continuous casting machine for the continuous production of thin slabs from steel |
| DE19637545B4 (en) * | 1996-09-14 | 2007-10-18 | Sms Demag Ag | Device for diverting a cast in a continuous casting thin slab strand from the vertical in a horizontal Ausförderrichtung |
-
1998
- 1998-08-26 DE DE19838774A patent/DE19838774A1/en not_active Withdrawn
-
1999
- 1999-08-19 US US09/377,352 patent/US6427758B1/en not_active Expired - Fee Related
- 1999-08-19 EP EP99116308A patent/EP0992303B1/en not_active Expired - Lifetime
- 1999-08-19 AT AT99116308T patent/ATE243588T1/en active
- 1999-08-19 ES ES99116308T patent/ES2202974T3/en not_active Expired - Lifetime
- 1999-08-19 DE DE59906073T patent/DE59906073D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19838774A1 (en) | 2000-03-02 |
| ATE243588T1 (en) | 2003-07-15 |
| ES2202974T3 (en) | 2004-04-01 |
| DE59906073D1 (en) | 2003-07-31 |
| US6427758B1 (en) | 2002-08-06 |
| EP0992303A1 (en) | 2000-04-12 |
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