EP1899092A1 - Apparatus for the continuous surface cleaning of rotationally movable casting rolls of a strip-casting machine - Google Patents

Apparatus for the continuous surface cleaning of rotationally movable casting rolls of a strip-casting machine

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Publication number
EP1899092A1
EP1899092A1 EP06828793A EP06828793A EP1899092A1 EP 1899092 A1 EP1899092 A1 EP 1899092A1 EP 06828793 A EP06828793 A EP 06828793A EP 06828793 A EP06828793 A EP 06828793A EP 1899092 A1 EP1899092 A1 EP 1899092A1
Authority
EP
European Patent Office
Prior art keywords
laser beam
cleaning
casting roll
casting
units
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
EP06828793A
Other languages
German (de)
French (fr)
Other versions
EP1899092B1 (en
Inventor
Heinrich Marti
Jacques Barbé
Philip Eichenberger
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.)
Main Management Inspiration AG
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Main Management Inspiration AG
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Filing date
Publication date
Application filed by Main Management Inspiration AG filed Critical Main Management Inspiration AG
Publication of EP1899092A1 publication Critical patent/EP1899092A1/en
Application granted granted Critical
Publication of EP1899092B1 publication Critical patent/EP1899092B1/en
Not-in-force 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0674—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for machining
    • 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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D43/00—Mechanical cleaning, e.g. skimming of molten metals

Definitions

  • the invention relates to a device for continuous surface cleaning of rotatable casting rolls of a strip casting machine.
  • the device according to the invention in which a laser beam unit or a plurality of laser beam units arranged side by side and distributed over the casting roll length, by means of which the casting roll surface can be acted upon by one or more laser beams over the entire casting roll length, enables a gapless and regular surface cleaning of casting rolls because the laser beams have very clear boundaries and can be matched to one another in such a way that no joining or overlapping points arise. There are no scratches or abrasions on the casting roller surface.
  • the device can be used during the entire casting operation in the maintenance positions or in an external workshop. It is compact and low maintenance.
  • FIG. 1 shows a part of a strip casting machine 1 with two casting rolls, each with an inventive device for cleaning the surface of the casting rolls.
  • Fig. 2 shows the strip casting machine part of FIG. 1 in a perspective view
  • a part of a strip casting machine 1 with two rotatable about horizontal axes casting rolls 2, 3 is shown, whose directions of rotation are denoted by D 2 D 3 and of which at least one casting roll for changing the casting gap is movably adjustable.
  • D 2 D 3 directions of rotation
  • the metal strip 4 produced is led away through a passage gap 9 between the two cooled casting rolls 2, 3 in the direction of arrow A in FIG.
  • a chamber 10 for an inert gas e.g. Argon
  • the enclosing this chamber 10, upper housing part 1 1 is equipped with one each with the respective casting roll 2, 3 and the respective side seals 5 cooperating sealing system 12, 13, by means of which the chamber 10 is separated from the rest of the housing interior of the strip casting machine 1.
  • an inert gas e.g. Argon
  • the two casting rolls 2, 3 each associated with an inventive apparatus 20 for surface cleaning, by means of which the solidification of the liquid metal causing, cooled and rotating casting roll surface 2a and 3a of Metal oxides, slag or other contaminants is continuously released before it comes back in contact with the liquid metal.
  • the surface cleaning is carried out by means of a laser unit 25 arranged on the circumference of the respective casting roll 2, 3 (with one or more laser beams acting on the respective casting rolls 2, 3 over their entire length) or by means of a plurality of laser beam units 25.
  • a laser unit 25 arranged on the circumference of the respective casting roll 2, 3 (with one or more laser beams acting on the respective casting rolls 2, 3 over their entire length) or by means of a plurality of laser beam units 25.
  • a plurality of laser beam units 25 these are-as shown in FIG. 2-arranged side by side in one or more rows and distributed over the entire length of the respective casting roll 2, 3.
  • the laser beam units 25 may be arranged in a stationary manner at a distance from the casting roll or in the axial direction of the casting rolls 2, 3.
  • the laser beams can be matched to one another in such a way that no joining or overlapping points arise. They work extremely fast and generate extremely high local temperatures, causing the impurities to evaporate or break away. On the casting roll surface 2a, 3a no scratch marks or erosion arise, because the extremely short and localized action of the radiation acts very gently. Since the roller surfaces 2a, 3a do not receive the laser beam, but reflect it, in contrast to the cover layer, the cleaning process stops.
  • the conditions between the casting roll surfaces 2 a, 3 a and the molten metal are not affected by the cleaning equipment during the entire casting period and thus the quality of theête- NEN band not influenced.
  • the service lives of the casting roll surfaces or the casting rolls coats are extended.
  • a suction and filtering device 26 is provided for the impurities separated by the laser beam unit or the laser beam units 25 for the impurities separated by the laser beam unit or the laser beam units 25, a suction and filtering device 26 is provided. In order to protect the G cumrollenoberfest from contamination by the liquid steel escaping gases or smoke, they are discharged together with introduced inert gas from the chamber 10. In order to keep splashes of the casting roll, in particular during casting, a splash guard 44 is provided.
  • the laser beam cleaning or the removal of oxides can be stopped automatically: if there are no more oxides on the casting roll surface, the laser beam is reflected and thus the effect on the casting roll surface is adjusted so that it does not suffer any damage.
  • the device 20 for surface cleaning of the respective casting rolls 2, 3 according to the invention may comprise, in addition to the laser beam unit or laser beam units 25, at least one additional additional cleaning unit for mechanical, chemical, galvanic and / or thermal cleaning of the casting roll surface 2a, 3a, which surrounds the laser beam unit or the Laser beam units 25 in the direction of rotation D 2 , D 3 of the casting roll forward and / or downstream can be.
  • the laser beam unit or the laser beam units 25 is advantageously followed by a over the entire length of the respective casting roll 2, 3 extending cleaning brush 45 in the direction of rotation D 2j D 3 of the casting roll 2, 3, with which the possible residues can be completely removed.
  • the cleaning brush 45 is preferably accommodated in an enclosure 47, from which the residual particles are removed by means of a suction device 46.
  • a cleaning brush 45 may be much softer than conventional cleaning brushes, and is also used with less contact force. Such cleaning brushes thus also have longer service lives and cause no damage to the casting roll surfaces 2a, 3a.
  • the condition of the cleaned casting roll surface 2a, 3a, the position, the temperature and the profile of the casting roll are monitored, for which a measuring device 40 is present, which preferably comprises a number of sensors arranged side by side or offset over the casting roll length (cf. 2).
  • the inventive device for surface cleaning / renewal of casting rolls can be used during the casting operation or during the entire casting period, in the maintenance positions or in an external workshop. It is compact and low maintenance.
  • the particle emitter and / or laser beam unit or the laser beam units 25, the final cleaning with suction, an inert gas supply and a splash guard form an overall system, which ensures optimum cleaning of the roll surfaces.
  • a mechanical cleaning can also be performed by scrapers or scratches.
  • a particle beam for cleaning organic, ceramic, metallic particles, plastic particles or dry ice can be used. It is also a twisting, milling, or grinding these surfaces possible.
  • a chemical or a chemical mechanical cleaning can also be used, for example in the form of etching, preferably with a specific acid, or in the form of waste liquors. Furthermore, can a cleaning can also be done by ultrasound with a liquid carrier medium.
  • a thermal cleaning is also conceivable.
  • a melting or burning away of the surface deposits is achieved by deliberate heating on the roller surface, wherein the molten deposits are dabbed or otherwise removed.
  • the at least one laser beam unit 25 can also be used for renewal of the casting roll surface during or outside operation, for example for the creation of dimples (dimples or textures). Such textures could also be restored by other means, such as by diamonds, needles, pneumatic needle punch, or roller blading. It is also possible to bring about this by the mentioned particle beam with ceramic particles, plastic particles, metal particles, etc.
  • the cleaning devices can be used to clean the inline rolling mill rolls individually or as a system, especially for long sequences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Continuous Casting (AREA)

Abstract

An apparatus serves for the continuous surface cleaning of rotationally movable casting rolls (2, 3) of a strip-casting machine. A plurality of laser beam units (25) are arranged on the circumference of the respective casting roll (2, 3), which laser beam units (25) are arranged next to one another, are distributed over the casting-roll length and by means of which the casting-roll surface (2a, 3a) can be acted upon with one or more laser beams over the entire casting-roll length. Additional cleaning units (30, 31, 35, 45) for the mechanical cleaning of the casting-roll surface are advantageously connected ahead of and/or behind the laser beam units (25). This makes gap-free and regular surface cleaning of the casting rolls possible.

Description

Vorrichtung zur kontinuierlichen Oberflächenreinigung von drehbeweglichen Giessrollen einer Bandgiessmaschine Apparatus for continuous surface cleaning of rotatable casting rolls of a strip casting machine
Die Erfindung betrifft eine Vorrichtung zur kontinuierlichen Oberflächenreinigung von drehbeweglichen Giessrollen einer Bandgiessmaschine.The invention relates to a device for continuous surface cleaning of rotatable casting rolls of a strip casting machine.
Bei Giessanlagen, die eine oder zwei Giessrollen beinhalten, wird bekanntlich flüssiger Stahl in Kontakt mit der gekühlten Giessrollenoberflä- che gebracht, um sich auf dieser zu verfestigen. Bevor die sich drehende Giessrolle wieder mit dem flüssigen Stahl in Kontakt kommt, muss sie kontinuierlich gereinigt werden, um eine Ansammlung von Metalloxyden, Schlacke oder anderen Verunreinigungen auf der Giessrollenoberfläche zu verhindern. Zur Oberflächenreinigung werden mechanische Reinigungsgeräte wie Kratzer, Bürsten oder Reinigungsbänder verwendet, wobei es schwierig ist, eine gleichmässige Reinigung über die Gesamtlänge der Giessrolle zu gewährleisten. Die ungleichmässige Reinigung wirkt sich negativ auf die Qualität des vergossenen Produktes aus. Um die Reinigung zu verbessern, ist es bekannt, mehrere Reinigungsgeräte nebeneinander über die Giessrollenlänge zu verteilen, wobei jedoch die Gefahr besteht, dass sich Fugestellen bilden, die die Oberflächenreinigung beeinträchtigen. Bei den Reinigungsgeräten handelt es sich um Gegenstände, welche Kratzspuren oder Abtragungen auf der Giessrollenoberfläche verursachen können. Diese neigen dazu, Oberflächendefekte auf dem vergossenen Band zu bilden. Im Eingiessbereich können durch die den Flüssigstahl entweichenden Gase und Spritzer beim Angiessen die Giessrollenoberflä- chen kontaminieren.In the case of casting machines which include one or two casting rolls, it is known that liquid steel is brought into contact with the cooled casting roll surface in order to solidify thereon. Before the rotating casting roll comes into contact with the liquid steel again, it must be continuously cleaned to allow accumulation of metal oxides, slag or other contaminants on the casting roll surface prevent. Surface cleaning uses mechanical cleaning equipment such as scratches, brushes, or cleaning tapes, and it is difficult to ensure uniform cleaning over the entire length of the casting roll. The uneven cleaning has a negative effect on the quality of the potted product. To improve the cleaning, it is known to distribute several cleaning equipment side by side over the casting roll length, but there is a risk that form Fugestellen that affect the surface cleaning. The cleaning devices are objects which can cause scratch marks or abrasions on the casting roller surface. These tend to form surface defects on the cast strip. In the pouring area, the casting roll surfaces can be contaminated by the gases and splashes escaping from the liquid steel during casting.
Aus der US- 5,651 ,413 ist es bekannt, die Giessrollenoberfläche mittels einer Partikel- bzw. Sandstrahlvorrichtung zu reinigen. Dazu werden eine oder mehrere, über die Giessrollenlänge verteilte Strahldüsen verwendet. Die Partikelanzahl sowie die Strahlgeschwindigkeit nimmt im Strahlkegel gegen aussen hin ab, so dass die Reinigung unregelmässig ist. Bei der Anordnung von mehreren Strahldüsen entstehen Berührungs- oder Überlappungsbereiche, die ebenfalls zu einer unregelmässigen Reinigung führen können. Die Partikel- bzw. Sandstrahlvorrichtung, die neben der Düse oder den Düsen einen Auffangbehälter für die Sandpartikel, eine Rückführung derselben, einen Sammelbehälter, eine Einspeisung sowie einen druckbeaufschlagten, die Sandpartikel wieder zu der Düse zuführenden Verteiler umfasst, braucht Platz. Zudem entsteht zusätzlicher Staub durch das Zerbrechen der Partikel. Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, die eine regelmässige Oberflächenreinigung über die gesamte Giessrollenlänge ermöglicht, und bei der die Gefahr von Beschädigung oder vom Abtragen der Giessrollenoberflä- che weitgehend eliminiert wird.From US Pat. No. 5,651,413 it is known to clean the casting roll surface by means of a particle or sandblasting device. For this purpose one or more jet nozzles distributed over the casting roll length are used. The number of particles as well as the jet velocity decreases in the cone of rays towards the outside, so that the cleaning is irregular. In the arrangement of multiple jet nozzles arise contact or overlap areas, which can also lead to an irregular cleaning. The particle or sand blasting device, which comprises a collecting container for the sand particles, a return of the same, a collecting container, a feed and a pressurized, the sand particles returning to the nozzle next to the nozzle or nozzles distributor needs space. In addition, additional dust is created by the breaking of the particles. The present invention has for its object to provide a device of the aforementioned type, which allows a regular surface cleaning over the entire Giessrollenlänge, and in which the risk of damage or removal of Giessrollenoberflä- surface is largely eliminated.
Diese Aufgabe wird erfindungsgemäss durch eine Vorrichtung mit den Merkmalen des Anspruches 1 gelöst.This object is achieved according to the invention by a device having the features of claim 1.
Weitere bevorzugte Ausgestaltungen der erfindungsgemässen Vorrichtung bilden den Gegenstand der abhängigen Ansprüche.Further preferred embodiments of the inventive device form the subject of the dependent claims.
Die erfindungsgemässe Vorrichtung, bei der am Umfang der jeweiligen Giessrolle eine Laserstrahleinheit oder mehrere nebeneinander angeordnete, über die Giessrollenlänge verteilte Laserstrahleinheiten angeordnet sind, mittels denen die Giessrollenoberfläche über die gesamte Giessrollenlänge mit einem oder mehreren Laserstrahlen beaufschlagbar ist, ermöglicht eine lückenlose und regelmässige Oberflächenreinigung von Giessrollen, da die Laserstrahlen sehr klare Grenzen aufweisen und derart aufeinander abgestimmt werden können, dass keine Füge- oder Überlappungsstellen entstehen. Auf der Giessrollenoberfläche entstehen keine Kratzspuren oder Abtragungen. Die Vorrichtung kann während des gesamten Giessbetriebs in den Wartungspositionen oder in einer externen Werkstatt eingesetzt werden. Sie ist kompakt und wartungsarm.The device according to the invention, in which a laser beam unit or a plurality of laser beam units arranged side by side and distributed over the casting roll length, by means of which the casting roll surface can be acted upon by one or more laser beams over the entire casting roll length, enables a gapless and regular surface cleaning of casting rolls because the laser beams have very clear boundaries and can be matched to one another in such a way that no joining or overlapping points arise. There are no scratches or abrasions on the casting roller surface. The device can be used during the entire casting operation in the maintenance positions or in an external workshop. It is compact and low maintenance.
Die Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigen rein schematisch: - A -The invention will be explained in more detail with reference to the drawing. It shows purely schematically: - A -
Fig. 1 einen Teil einer Bandgiessmaschine 1 mit zwei Giessrollen, mit je einer erfindungsgemässen Vorrichtung zur Oberflächenreinigung der Giessrollen;1 shows a part of a strip casting machine 1 with two casting rolls, each with an inventive device for cleaning the surface of the casting rolls.
Fig. 2 den Bandgiessmaschinenteil nach Fig. 1 in perspektivischer DarstellungFig. 2 shows the strip casting machine part of FIG. 1 in a perspective view
In Fig. l und 2 wird ein Teil einer Bandgiessmaschine 1 mit zwei um horizontale Achsen drehbaren Giessrollen 2, 3 gezeigt, deren Drehrichtungen mit D2 D3 bezeichnet sind und von denen mindestens eine Giessrolle zur Veränderung des Giessspaltes beweglich einstellbar ist. Zur Erzeugung eines Metallbandes 4 wird zwischen die beiden Giessrollen 2, 3 und zwei im Stirnseitenbereich der Giessrollen 2, 3 angeordnete Seitenabdichtungen 5 (vgl. Fig. 2, die eine der beiden Seitenabdichtungen 5 zeigt) über eine Eingiessvorrichtung 6 aus einem Behälter 7 das flüssige Metall eingegossen und bildet ein Schmelzbad 8. Das erzeugte Metallband 4 wird durch einen Durchgangsspalt 9 zwischen den beiden, gekühlten Giessrollen 2, 3 in Pfeilrichtung A nach Fig. 1 weggeführt.In Fig. L and 2, a part of a strip casting machine 1 with two rotatable about horizontal axes casting rolls 2, 3 is shown, whose directions of rotation are denoted by D 2 D 3 and of which at least one casting roll for changing the casting gap is movably adjustable. To produce a metal strip 4, between the two casting rolls 2, 3 and two side seals 5 (see Fig. 2, which shows one of the two side seals 5) in the front side region of the casting rolls 2, 3 via a pouring device 6 from a container 7, the liquid Cast metal and forms a molten bath 8. The metal strip 4 produced is led away through a passage gap 9 between the two cooled casting rolls 2, 3 in the direction of arrow A in FIG.
Oberhalb des Schmelzbades 8 ist eine Kammer 10 für ein Schutzgas, z.B. Argon, gebildet. Der diese Kammer 10 umschliessende, obere Gehäuseteil 1 1 ist mit je einem mit der jeweiligen Giessrolle 2, 3 und den jeweiligen Seitenabdichtungen 5 zusammenwirkenden Dichtsystem 12, 13 ausgestattet, mittels welchem die Kammer 10 vom übrigen Gehäuseinnern der Bandgiessmaschine 1 getrennt ist.Above the molten bath 8 is a chamber 10 for an inert gas, e.g. Argon, formed. The enclosing this chamber 10, upper housing part 1 1 is equipped with one each with the respective casting roll 2, 3 and the respective side seals 5 cooperating sealing system 12, 13, by means of which the chamber 10 is separated from the rest of the housing interior of the strip casting machine 1.
Wie insbesondere aus Fig. 1 ersichtlich, ist den beiden Giessrollen 2, 3 je eine erfindungsgemässe Vorrichtung 20 zur Oberflächenreinigung zugeordnet, mittels welcher die die Verfestigung des flüssigen Metalls bewirkende, gekühlte und sich drehende Giessrollenoberfläche 2a bzw. 3a von Metalloxyden, Schlacke oder anderen Verunreinigungen kontinuierlich befreit wird, bevor sie wieder mit dem flüssigen Metall in Kontakt kommt.As can be seen in particular from Fig. 1, the two casting rolls 2, 3 each associated with an inventive apparatus 20 for surface cleaning, by means of which the solidification of the liquid metal causing, cooled and rotating casting roll surface 2a and 3a of Metal oxides, slag or other contaminants is continuously released before it comes back in contact with the liquid metal.
Erfindungsgemäss wird die Oberflächenreinigung mittels einer am Umfang der jeweiligen Giessrolle 2, 3 angeordneten Lasereinheit 25 (mit einem oder mehreren die jeweiligen Giessrolle 2, 3 über ihre Gesamtlänge beaufschlagenden Laserstrahl) oder mittels mehreren Laserstrahleinheiten 25 durchgeführt. Bei der letztgenannten Variante mit mehreren Laserstrahleinheiten 25 werden diese - wie Fig. 2 zeigt - nebeneinander in einer oder mehreren Reihen angeordnet und über die Gesamtlänge der jeweiligen Giessrolle 2, 3 verteilt. Dabei wird dafür gesorgt, dass die Laserstrahlen vollständig und gleichmässig die Giessrollenoberfläche 2a, 3a über die Gesamtlänge beaufschlagen. Die Laserstrahleinheiten 25 können ortsfest in einem Abstand zur Giessrolle oder in Achsrichtung der Giessrollen 2, 3 beweglich angeordnet sein.According to the invention, the surface cleaning is carried out by means of a laser unit 25 arranged on the circumference of the respective casting roll 2, 3 (with one or more laser beams acting on the respective casting rolls 2, 3 over their entire length) or by means of a plurality of laser beam units 25. In the latter variant with a plurality of laser beam units 25, these are-as shown in FIG. 2-arranged side by side in one or more rows and distributed over the entire length of the respective casting roll 2, 3. In this case, it is ensured that the laser beams completely and uniformly act on the casting roller surface 2a, 3a over the entire length. The laser beam units 25 may be arranged in a stationary manner at a distance from the casting roll or in the axial direction of the casting rolls 2, 3.
Die Laserstrahlen können derart aufeinander abgestimmt werden, dass keine Füge- bzw. Überlappungsstellen entstehen. Sie wirken extrem schnell und erzeugen extrem hohe Lokaltemperaturen, so dass die Verunreinigungen verdampfen oder wegsprengen. Auf der Giessrollenoberfläche 2a, 3a entstehen keine Kratzspuren oder Abtragungen, weil die extrem kurze und lokal begrenzte Einwirkung der Strahlung sehr schonend wirkt. Da die Rollenoberflächen 2a, 3a den Laserstrahl im Gegensatz zur Deckschicht nicht aufnimmt, sondern reflektiert, stoppt der Reinigungsprozess.The laser beams can be matched to one another in such a way that no joining or overlapping points arise. They work extremely fast and generate extremely high local temperatures, causing the impurities to evaporate or break away. On the casting roll surface 2a, 3a no scratch marks or erosion arise, because the extremely short and localized action of the radiation acts very gently. Since the roller surfaces 2a, 3a do not receive the laser beam, but reflect it, in contrast to the cover layer, the cleaning process stops.
Somit werden die Verhältnisse zwischen den Giessrollenoberflächen 2a, 3a und der Metallschmelze während der gesamten Giessperiode durch die Reinigungsgeräte nicht beeinträchtigt und somit die Qualität des vergösse- nen Bandes nicht beeinflusst. Die Standzeiten der Giessrollenoberflächen bzw. der Giessrollen-Mäntel werden verlängert.Thus, the conditions between the casting roll surfaces 2 a, 3 a and the molten metal are not affected by the cleaning equipment during the entire casting period and thus the quality of the vergessene- NEN band not influenced. The service lives of the casting roll surfaces or the casting rolls coats are extended.
Für die durch die Laserstrahleinheit bzw. die Laserstrahleinheiten 25 abgetrennten Verunreinigungen ist eine Absaug- und Filtervorrichtung 26 vorgesehen. Um die Giessrollenoberflächen vor Verunreinigung durch die dem Flüssigstahl entweichenden Gase bzw. Rauch zu schützen, werden diese zusammen mit eingebrachtem Inertgas aus der Kammer 10 abgeführt. Um Spritzer von der Giessrolle insbesondere beim Angiessen fernzuhalten, ist ein Spritzschutz 44 vorgesehen.For the impurities separated by the laser beam unit or the laser beam units 25, a suction and filtering device 26 is provided. In order to protect the Gießrollenoberflächen from contamination by the liquid steel escaping gases or smoke, they are discharged together with introduced inert gas from the chamber 10. In order to keep splashes of the casting roll, in particular during casting, a splash guard 44 is provided.
Die Laserstrahlreinigung bzw. die Beseitigung von Oxiden kann unter Umständen selbsttätig abgebrochen werden: wenn sich keine Oxide mehr auf der Giessrollenoberfläche befinden, wird der Laserstrahl reflektiert und somit die Einwirkung auf die Giessrollenoberfläche eingestellt, so dass diese keine Schädigung erleidet.Under certain circumstances, the laser beam cleaning or the removal of oxides can be stopped automatically: if there are no more oxides on the casting roll surface, the laser beam is reflected and thus the effect on the casting roll surface is adjusted so that it does not suffer any damage.
Die erfindungsgemässe Vorrichtung 20 zur Oberflächenreinigung der jeweiligen Giessrolle 2, 3 kann neben der Laserstrahleinheit bzw. den Laserstrahleinheiten 25 mindestens eine weitere zusätzliche Reinigungseinheit zur mechanischen, chemischen, galvanischen und/oder thermischen Reinigung der Giessrollenoberfläche 2a, 3a aufweisen, die der Laserstrahleinheit bzw. den Laserstrahleinheiten 25 in Drehrichtung D2, D3 der Giessrolle vor- und/oder nachgeschaltet werden kann.The device 20 for surface cleaning of the respective casting rolls 2, 3 according to the invention may comprise, in addition to the laser beam unit or laser beam units 25, at least one additional additional cleaning unit for mechanical, chemical, galvanic and / or thermal cleaning of the casting roll surface 2a, 3a, which surrounds the laser beam unit or the Laser beam units 25 in the direction of rotation D 2 , D 3 of the casting roll forward and / or downstream can be.
So wird mit Vorteil der Laserstrahleinheit bzw. den Laserstrahleinheiten 25 Abstreifer 30, 30' zum Abstreifen von grosseren Verunreinigungen in Drehrichtung D2, D3 der Giessrolle 2, 3 vorgeschaltet, die sich über die Gesamtlänge der jeweiligen Giessrolle 2, 3 und über den die Mantelfläche anschliessenden Bereich der Stirnseite erstrecken. Diesen schliessen auf der dem Band 4 abgekehrten Seite eine erste berührungslos zur Rollenoberfläche 2a angeordnete Bürste 35 sowie weitere Bürsten 35 ', welche stirnseitig angeordnet sind, und ein diese umgebende Absaughaube 34, 36 an, durch welche die von den Bürsten 35, 35 ' gelösten Schmutzpartikel abgesaugt werden. Zusätzlich kann auch eine Sandstrahlvorrichtung 31 mit einer Sandabsaugung und Sandwiederaufbereitung 32 (oder eine Reihe solcher Vorrichtungen 31 , vgl. Fig.2) der Laserstrahleinheit bzw. den Laserstrahleinheiten 25 vorgeschaltet werden. Es könnten auch noch zusätzliche, aus der Zeichnung nicht ersichtliche Bürsten oder Reinigungsbänder vor der Laserstrahleinheit bzw. den Laserstrahleinheiten 25 eingesetzt werden.Thus, with advantage of the laser beam unit or the laser beam units 25 scrapers 30, 30 'for stripping larger contaminants in the direction of rotation D 2, D 3 of the casting roll 2, 3 upstream, over the total length of the respective casting roll 2, 3 and on the lateral surface extending subsequent area of the front side. This close on the side facing away from the band 4, a first contactless to the roller surface 2a arranged brush 35 and other brushes 35 ', which are arranged at the front, and a surrounding suction hood 34, 36, through which the of the brushes 35, 35' dissolved Dirt particles are sucked off. In addition, a sandblasting device 31 with a sand extraction and sand recycling 32 (or a number of such devices 31, see FIG. 2) can also be connected upstream of the laser beam unit or laser beam units 25. It could also be additional, not apparent from the drawing brushes or cleaning tapes in front of the laser beam unit or the laser beam units 25 are used.
Der Laserstrahleinheit bzw. den Laserstrahleinheiten 25 wird mit Vorteil eine sich über die Gesamtlänge der jeweiligen Giessrolle 2, 3 erstreckende Reinigungsbürste 45 in Drehrichtung D2j D3 der Giessrolle 2, 3 nachgeschaltet, mit der die allfälligen Rückstände vollständig entfernt werden können. Die Reinigungsbürste 45 ist gemäss Fig. 1 vorzugsweise in einer Einhausung 47 untergebracht, aus welcher die Restpartikel mittels einer Absaugvorrichtung 46 entfernt werden. Eine solche Reinigungsbürste 45 kann allerdings wesentlich weicher sein als herkömmliche Reinigungsbürsten, und wird auch mit weniger Anpresskraft verwendet. Derartige Reinigungsbürsten weisen somit auch längere Standzeiten auf und verursachen keine Beschädigungen der Giessrollenoberflächen 2a, 3a.The laser beam unit or the laser beam units 25 is advantageously followed by a over the entire length of the respective casting roll 2, 3 extending cleaning brush 45 in the direction of rotation D 2j D 3 of the casting roll 2, 3, with which the possible residues can be completely removed. According to FIG. 1, the cleaning brush 45 is preferably accommodated in an enclosure 47, from which the residual particles are removed by means of a suction device 46. However, such a cleaning brush 45 may be much softer than conventional cleaning brushes, and is also used with less contact force. Such cleaning brushes thus also have longer service lives and cause no damage to the casting roll surfaces 2a, 3a.
Es wäre auch eine gemeinsame Einhausung von Bürsten oder Reinigungsbändern und den Lasereinheiten möglich, wodurch die Abführung und Filterung der abgelösten Verunreinigungen vereinfacht wäre. Zudem könnte die gesamte Reinigungsvorrichtung 20 als Einheit beispielsweise beim Giessrollenwechsel in einfacher Weise z.B. abgekippt werden.It would also be a common enclosure of brushes or cleaning tapes and the laser units possible, whereby the discharge and filtering of the detached impurities would be simplified. In addition, could the entire cleaning device 20 as a unit, for example, during casting roll change in a simple manner, for example, be tilted.
Der Zustand der gereinigten Giessrollenoberfläche 2a, 3a, die Position, die Temperatur sowie das Profil der Giessrolle werden überwacht, wozu eine Messvorrichtung 40 vorhanden ist, die vorzugsweise eine Anzahl von nebeneinander oder versetzt angeordneten, über die Giessrollenlänge verteilten Sensoren umfasst (vgl. insbesondere Fig. 2).The condition of the cleaned casting roll surface 2a, 3a, the position, the temperature and the profile of the casting roll are monitored, for which a measuring device 40 is present, which preferably comprises a number of sensors arranged side by side or offset over the casting roll length (cf. 2).
Die erfindungsgemässe Vorrichtung zur Oberflächenreinigung/ Erneuerung von Giessrollen kann während des Giessbetriebs bzw. während der gesamten Giessperiode, in den Wartungspositionen oder in einer externen Werkstatt eingesetzt werden. Sie ist kompakt und wartungsarm.The inventive device for surface cleaning / renewal of casting rolls can be used during the casting operation or during the entire casting period, in the maintenance positions or in an external workshop. It is compact and low maintenance.
Die Partikelstrahler und/oder Laserstrahleinheit bzw. die Laserstrahleinheiten 25, die Endreinigung mit Absaugung, eine Inertgasversorgung sowie ein Spritzschutz bilden ein Gesamtsystem, welches eine optimale Reinigung der Rollenoberflächen gewährleistet.The particle emitter and / or laser beam unit or the laser beam units 25, the final cleaning with suction, an inert gas supply and a splash guard form an overall system, which ensures optimum cleaning of the roll surfaces.
Eine mechanische Reinigung kann auch durch Schaber oder Kratzer ausgeführt werden. Bei einem Partikelstrahl für die Reinigung kann organische, keramische, metallische Partikel, Kunststoffpartikel oder Trockeneis verwendet werden. Es ist auch ein Abdrehen, Fräsen, oder ein Schleifen dieser Oberflächen möglich.A mechanical cleaning can also be performed by scrapers or scratches. With a particle beam for cleaning, organic, ceramic, metallic particles, plastic particles or dry ice can be used. It is also a twisting, milling, or grinding these surfaces possible.
Eine chemische bzw. eine chemisch-mechanische Reinigung kann auch angewendet werden, beispielsweise in Form von Ätzen, vorzugsweise mit einer bestimmten Säure, oder in Form von Ablaugen. Des weiteren kann eine Reinigung auch durch Ultraschall mit einem flüssigen Trägermedium erfolgen.A chemical or a chemical mechanical cleaning can also be used, for example in the form of etching, preferably with a specific acid, or in the form of waste liquors. Furthermore, can a cleaning can also be done by ultrasound with a liquid carrier medium.
Eine thermische Reinigung ist ebenfalls denkbar. Hierbei wird durch gezieltes Aufheizen an der Rollenoberfläche ein Schmelzen bzw. Wegbrennen der Oberflächenablagerungen erwirkt, wobei die geschmolzenen Ablagerungen abgetupft oder anderweitig entfernt werden.A thermal cleaning is also conceivable. In this case, a melting or burning away of the surface deposits is achieved by deliberate heating on the roller surface, wherein the molten deposits are dabbed or otherwise removed.
Die mindestens eine Laserstrahleinheit 25 ist auch zur Erneuerung der Giessrollenoberfläche während oder ausserhalb des Betriebes einsetzbar, zum Beispiel für die Erzeugung von Grübchen (Dimples oder Texturen). Solche Texturen könnten auch durch andere Mittel, wie zum Beispiel durch Diamanten, Nadeln, Druckluft-Nadelklopfer oder Randrierwalze wieder hergestellt werden. Möglich ist auch, dies durch den erwähnten Partikelstrahl mit keramischen Partikeln, Kunststoffpartikeln, Metallpartikeln etc. herbeizuführen.The at least one laser beam unit 25 can also be used for renewal of the casting roll surface during or outside operation, for example for the creation of dimples (dimples or textures). Such textures could also be restored by other means, such as by diamonds, needles, pneumatic needle punch, or roller blading. It is also possible to bring about this by the mentioned particle beam with ceramic particles, plastic particles, metal particles, etc.
Die Reinigungsgeräte können zur Reinigung der Inline-Walzwerksrollen sind einzeln oder als System insbesondere bei langen Sequenzen eingesetzt werden. The cleaning devices can be used to clean the inline rolling mill rolls individually or as a system, especially for long sequences.

Claims

PATENTANSPRUCHE PATENT CLAIMS
1. Vorrichtung zur kontinuierlichen Oberflächenreinigung von drehbeweglichen Giessrollen (2, 3) einer Bandgiessmaschine, dadurch gekennzeichnet, dass am Umfang der jeweiligen Giessrolle (2, 3) eine Laserstrahleinheit oder mehrere nebeneinander angeordnete, über die Giessrollenlänge verteilte Laserstrahleinheiten (25) angeordnet sind, mittels denen die Giessrollen- oberfläche (2a, 3a) über die gesamte Giessrollenlänge mit einem oder mehreren Laserstrahlen beaufschlagbar ist.1. A device for continuous surface cleaning of rotatable casting rolls (2, 3) a strip casting machine, characterized in that on the circumference of the respective casting roll (2, 3) a laser beam unit or more juxtaposed, distributed over the casting roll length laser beam units (25) are arranged by means in which the casting roll surface (2a, 3a) can be acted upon by one or more laser beams over the entire casting roll length.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Laserstrahleinheit bzw. die Laserstrahleinheiten (25) ortsfest in einem Abstand zur Giessrolle oder in Längsrichtung der Giessrolle (2, 3) beweglich angeordnet ist/sind. 2. Apparatus according to claim 1, characterized in that the laser beam unit or the laser beam units (25) is fixedly arranged at a distance from the casting roll or in the longitudinal direction of the casting roll (2, 3) is / are movable.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zusätzliche Reinigungseinheiten (30, 31 , 35, 45) zur mechanischen, chemischen, galvanischen und/oder thermischen Reinigung der Giessrollenober- fläche am Umfang der jeweiligen Giessrolle (2, 3) angeordnet und der Laserstrahleinheit bzw. den Laserstrahleinheiten (25) in Drehrichtung (D2j D3) der jeweiligen Giessrolle vor- und/oder nachgeschaltet sind.3. Device according to claim 1 or 2, characterized in that additional cleaning units (30, 31, 35, 45) for mechanical, chemical, galvanic and / or thermal cleaning of Giessrollenober- surface on the circumference of the respective casting roll (2, 3) and the laser beam unit or the laser beam units (25) in the direction of rotation (D 2j D 3 ) of the respective casting roll forward and / or downstream.
4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Laserstrahleinheit bzw. die Laserstrahleinheiten (25) sowie die zusätzlichen Reinigungseinheiten (30, 31 , 35, 45) mit Absaug- und Filtervorrichtungen (26, 32, 36, 46) versehen sind.4. Apparatus according to claim 3, characterized in that the laser beam unit or the laser beam units (25) and the additional cleaning units (30, 31, 35, 45) with suction and filter devices (26, 32, 36, 46) are provided.
5. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass der Laserstrahleinheit bzw. den Laserstrahleinheiten (25) und den zusätzlichen Reinigungseinheiten (30, 31 , 35, 45) eine gemeinsame Einhausung zugeordnet ist.5. Apparatus according to claim 3, characterized in that the laser beam unit or the laser beam units (25) and the additional cleaning units (30, 31, 35, 45) is associated with a common housing.
6. Vorrichtung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass der Laserstrahleinheit bzw. den Laserstrahleinheiten (25) Abstreifer (30, 30') und/oder Bürsten (35, 35') zum Entfernen von grosseren Verunreinigungen in Drehrichtung (D2, D3) der jeweiligen Giessrolle (2, 3) auf der Stirn- und Mantelfläche vorgeschaltet ist.6. Device according to one of claims 3 to 5, characterized in that the laser beam unit or the laser beam units (25) scrapers (30, 30 ') and / or brushes (35, 35') for removing larger impurities in the direction of rotation (D 2 , D 3 ) of the respective casting roll (2, 3) is connected upstream on the front and lateral surface.
7. Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass der Laserstrahleinheit bzw. den Laserstrahleinheiten (25) eine Partikelstrahlvorrichtung (31 ) in Drehrichtung (D2, D3) der jeweiligen Giessrolle (2, 3) vor- oder nachgeschaltet ist. 7. Device according to one of claims 3 to 6, characterized in that the laser beam unit or the laser beam units (25) upstream or downstream of a particle beam device (31) in the direction of rotation (D 2 , D 3 ) of the respective casting roll (2, 3) is.
8. Vorrichtung nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass der Laserstrahleinheit bzw. den Laserstrahleinheiten (25) mindestens eine Reinigungsbürste (45) mit Absaugung zur Entfernung allfälliger Rückstände in Drehrichtung (D2, D3) der jeweiligen Giessrolle (2, 3) nachgeschaltet ist bzw. sind.8. Device according to one of claims 3 to 7, characterized in that the laser beam unit or the laser beam units (25) at least one cleaning brush (45) with suction to remove any residues in the direction of rotation (D 2 , D 3 ) of the respective casting roll (2 , 3) is or are downstream.
9. Vorrichtung nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, dass die durch die Laserstrahleinheit bzw. die Laserstrahleinheiten (25) erzeugten Laserstrahlen von einer gereinigten Giessrollenoberflä- che (2a, 3a) reflektierbar ist.9. Device according to one of claims 3 to 8, characterized in that the laser beam generated by the laser beam unit or the laser beam units (25) laser beams from a cleaned Giessrollenoberflä- surface (2a, 3a) is reflected.
10. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Abstreifer, die berührungslosen Bürsten (35, 35'), Partikelstrahler und/oder die Laserstrahleinheit bzw. die Laserstrahleinheiten (25), die Endreinigung mit Absaugung, eine Inertgasversorgung, ein Spritzschutz sowie ein Gasbzw. Rauchabzug, der die Gase bzw. den Rauch aus der Kammer (10) abführt, ein Gesamtsystem bilden.10. The device according to claim 7, characterized in that the scrapers, the contactless brushes (35, 35 '), particle emitters and / or the laser beam unit or the laser beam units (25), the final cleaning with suction, an inert gas, a splash guard and a Gasbzw. Smoke vent, which dissipates the gases or smoke from the chamber (10), form an overall system.
1 1. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die mindestens eine Laserstrahleinheit (25) auch zur Erneuerung der Giessrollenoberfläche während oder ausserhalb des Betriebes einsetzbar ist, zum Beispiel für die Erzeugung von Grübchen.1 1. Device according to one of claims 1 to 10, characterized in that the at least one laser beam unit (25) can also be used for renewal of the Giessrollenoberfläche during or outside of the operation, for example, for the production of dimples.
12. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Reinigungsgeräte zur Reinigung der Inline-Walzwerks- rollen einzeln oder als System insbesondere bei langen Sequenzen einsetzbar sind. 12. Device according to one of claims 1 to 10, characterized in that the cleaning devices for cleaning the inline rolling mill rolls are used individually or as a system, especially for long sequences.
13. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine chemische bzw. eine chemisch-mechanische Reinigung durch Ätzen, vorzugsweise mit einer bestimmten Säure, durch Ablaugen oder durch Ultraschall mit einem flüssigen Trägermedium ausgeführt ist.13. Device according to one of claims 1 to 3, characterized in that a chemical or a chemical-chemical cleaning by etching, preferably with a certain acid, by leaching or by ultrasound is carried out with a liquid carrier medium.
14. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine thermische Reinigung durch gezieltes Aufheizen an der Rollenoberfläche ausführbar ist, mittels dem ein Schmelzen bzw. Wegbrennen der Schmutzpartikel auf der Rollenoberfläche erwirkt wird. 14. Device according to one of claims 1 to 3, characterized in that a thermal cleaning by selective heating to the roller surface is executable, by means of which a melting or burning away of the dirt particles on the roller surface is obtained.
EP06828793.7A 2005-07-07 2006-07-07 Apparatus for the continuous surface cleaning of rotationally movable casting rolls of a strip-casting machine Not-in-force EP1899092B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01133/05A CH698238B1 (en) 2005-07-07 2005-07-07 Device for the continuous surface cleaning a rotatable casting rolls of a strip-casting machine.
PCT/EP2006/006724 WO2007031135A1 (en) 2005-07-07 2006-07-07 Apparatus for the continuous surface cleaning of rotationally movable casting rolls of a strip-casting machine

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KR101302917B1 (en) 2013-09-06
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WO2007031135A1 (en) 2007-03-22
CH698238B1 (en) 2009-06-30
RU2008104629A (en) 2009-08-20
US7874345B2 (en) 2011-01-25
US20080223542A1 (en) 2008-09-18
RU2417133C2 (en) 2011-04-27
KR20080023219A (en) 2008-03-12
CN101218045A (en) 2008-07-09

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