EP2768622A1 - Stripper for an operating roll of a rolling stand - Google Patents

Stripper for an operating roll of a rolling stand

Info

Publication number
EP2768622A1
EP2768622A1 EP12761924.5A EP12761924A EP2768622A1 EP 2768622 A1 EP2768622 A1 EP 2768622A1 EP 12761924 A EP12761924 A EP 12761924A EP 2768622 A1 EP2768622 A1 EP 2768622A1
Authority
EP
European Patent Office
Prior art keywords
scraper
shielding
shielding element
work roll
rolling
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
EP12761924.5A
Other languages
German (de)
French (fr)
Other versions
EP2768622B1 (en
Inventor
Stephan Fischer
Andreas Löhr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2768622A1 publication Critical patent/EP2768622A1/en
Application granted granted Critical
Publication of EP2768622B1 publication Critical patent/EP2768622B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally

Definitions

  • the present invention relates to a scraper for a work roll rolling stand, in particular a work roll of a hot rolling stand, an apparatus for cooling a work roll of a rolling stand.
  • scrapers for the upper and lower work rolls are installed in the inlet and outlet of the respective stands.
  • the scrapers typically have constant contact with the work rolls. This contact is made in each case via a scraper tip, which contacts the respective work roll.
  • the scrapers are adapted to shield the rolling stock surface against the roll cooling water and are capable of scraping any rolling stock adhering to the work rolls from the work rolls.
  • the work rolls are subjected to a high thermal load during the rolling process.
  • the heat applied to the work rolls heat is transferred mainly in contact of the work rolls with the rolling stock in the nip, the registered heat energy is increased here by the additionally developed by the plastic deformation of the rolling stock rolling heat.
  • frictional heat is introduced by the friction generated between rolling stock and rolls, as well as also in the contact area between the work roll and the support rollers usually provided in the work rolls.
  • typically the radiant heat of the rolling stock in the inlet area and in the outlet area is transferred to the work rolls.
  • the roll cooling is of considerable importance.
  • it is attempted to withdraw by a sufficient external roll cooling, especially on the outlet side, the registered in the nip in the surface region of the work roll heat of the work roll as early as possible after leaving the nip to the penetration of heat in the depth of the roll as possible largely and efficiently prevent.
  • cooling water is sprayed onto the work rolls as early as possible.
  • the scrapers ensure that the outside of the work rolls sprayed cooling water does not come into contact with the rolling stock to prevent cooling of the rolling stock and / or a reduction in the quality of the rolling stock.
  • the scrapers are as deep as possible above the rolling stock or as close to the roll gap as possible. Some of the scrapers are also part of the respective inlet and outlet guides and are accordingly at least rotatable or often gimbal stored. The scraper is pressed against the respective work rolls either pneumatically, hydraulically or by an impact with a contact mass.
  • the scraper Since the scraper is typically arranged very close above the surface of the rolling stock, it is on one side, namely on the rolling stock facing side, exposed to high thermal stress. On the other hand, on the side facing away from the rolling stock, the scraper is charged with the cooling water, which he should wegalten from the rolling stock. Accordingly, the On the one hand, scrapers of the prior art are subjected to very high temperatures and, on the other hand, to cooling-water temperatures. This inevitably results in a different thermal expansion of the respective sides of the scraper, which may result in that the scraper buckles and can not provide a complete seal more for example in the central region of the rolling stock.
  • Stripping elements are known, for example, from DE 10 2008 019 548 A1 and from EP 0 899 030 A2.
  • the scraper for a work roll of a rolling stand in particular a hot rolling stand, a scraper tip for contacting a work roll of the rolling mill and a first shielding member for shielding the rolling against cooling water of the rolling mill is provided.
  • a second shielding element is provided for shielding the first shielding element against thermal loading by the rolling stock.
  • the first and second shield members are preferably spaced apart, preferably at a distance of 0.5cm to 5cm, more preferably at a distance of 1cm to 4cm, even more preferably at a distance of 2cm to 3cm.
  • a shielding of the first shielding element can be achieved by the second shielding element.
  • a parallelogram effect can be achieved in this way if the first shielding element and the second shielding element are subjected to a different temperature expansion due to different temperature action.
  • an insulating element for thermal insulation of the two shielding elements is arranged between the first shielding element and the second shielding element.
  • the second shielding element which serves to shield the thermal load from the rolling stock, is subjected to a significantly higher temperature than the first shielding element which keeps the cooling water away from the rolling stock.
  • bowing of the scraper can be prevented since a large temperature difference of the different sides within a single material, as known in the art, is avoided.
  • the scraper according to the present invention bulges in operation less strong or not at all, so that the shielding performance of the scraper can be set in the band center area targeted and controllable.
  • At least one third shielding element is provided at a distance from the first shielding element and / or from the second shielding element and / or at least one second insulating element is arranged between the third shielding element and the first and / or second shielding element.
  • the corresponding multi-part structure of the scraper in the form of a sandwich construction, in particular with an inner insulating layer, can fulfill this.
  • the insulating layer separates the side of high thermal stress from the side of low thermal stress.
  • the two shielding elements are connected to one another by a screw connection, preferably using spacers.
  • a particularly efficient construction is achieved by at least two shielding elements, which are spaced apart from one another by screw connections and / or spacers and connected to one another.
  • the scraper tip is formed as a separate component, which can preferably be quickly replaced by a simple closure.
  • the scraper tip can be made of a different material than the first and second shielding elements.
  • the scraper is preferably pivotally mounted as a whole relative to the rolling stand, so that a contact of the scraper tip is ensured with the outer surface of the respective work roll, even with movements or displacements of the axis of the work roll.
  • At least one stripping element extends integrally over the support length of a work roll.
  • a device for cooling the work roll of a rolling stand with the features of claim 10 also solves the above object.
  • the apparatus for cooling a work roll in a rolling stand comprises adewassersprühvorraum for spraying cooling water on the work roll, and a scraper described above, wherein the scraper between the rolling stock and thedewasseraufsprühvorraum is arranged.
  • Figure 1 shows an upper outlet side scraper according to a
  • a scraper 1 1 is provided, which is by means of its scraper tip 5 in contact with a work roll 1 of a stand of a hot rolling mill not explicitly shown.
  • the work roll 1 is in a conventional manner in contact with a support roller. 2
  • the work roll 1 is cooled in a likewise known manner. In addition to a known internal cooling of the work roll 1, it is also cooled by spraying with cooling water from the outside.
  • the work roll 1 is cooled by means of a cooling water spraying device 3.
  • Thedewassersprühvorraum 3 brings this large amounts of cooling water directly on the work roll 1.
  • the scraper 1 1 is disposed between the rolling stock 10 and thedebergsprühvorraum 3 to prevent the rolling stock
  • a cooling of the rolling stock 10 is namely not desired within the respective rolling mills.
  • the scraper 1 1 is arranged with its scraper tip 5 such that the cooling water as soon as possible after the exit of the
  • the scraper tip 5 is advantageously arranged as close as possible to the roll gap.
  • the scraper tip 5 advantageously extends over the entire support length of the work roll 1, in order to achieve a uniform stripping and a uniform cooling of the work roll 1.
  • the scraper 1 1 is pivotally mounted on a bearing pin 4.
  • the scraper tip 5 is pressed against the work roll 1 by means of a pneumatic cylinder 12 which is arranged on the stripper tip 5 opposite end of the scraper 1 1.
  • the bearing pin 4 is arranged between the stripper tip 5 and the pneumatic cylinder 12 accordingly.
  • the scraper 1 1 comprises a shielding element 8 for the actual shielding of the rolling stock 10 against the cooling water applied with the cooling water spray device 3.
  • a second shielding element 6 is provided, which serves to shield the first shielding element 8 against the thermal load of the rolling stock 10.
  • the second shielding element 6 is spaced from the first shielding element 8.
  • two shielding elements 8, 6 are provided here at a distance from one another, the first shielding element 8 protecting the rolling stock 10 from contact with the cooling water from the spraying device 3 and the second shielding element 6 protecting the first shielding element from excessive heat.
  • the second shielding element 6 is provided on the rolling stock 10 facing side of the scraper 1 1. Accordingly, the large radiant heat of the rolling stock 10 is shielded by the second shielding element 6 here. In this way, an excessively large temperature gradient in the thickness direction of the shielding element 8 can be avoided, whereby an adverse heat deformation of the scraper 1 1 can be avoided. Even if heat deformation of the first stripping element 6 and / or the second stripping element 8 occurs in the present exemplary embodiment, however, this typically results in only a parallelogram displacement of the two stripping elements 6, 8 against each other, which can be swiveled immediately by the pivot about the journal 4 Scraper 1 1 is balanced by means of the Anpressmasse 12.
  • the first shielding element 8 and the second shielding element 6 are connected to each other via schematically indicated fastening elements 9.
  • a fastening element 9 for example a screw connection, in combination with spacer elements is preferably provided.
  • an insulating member 7 is further provided between the first shielding element 8 and the second shielding element 6, which thermally insulated from each other the two plate-shaped shielding elements 8, 6.
  • the spacers in the fastening elements 9 then also serve to prevent the insulating layer 7 from being crushed or destroyed when the first shielding element 8 is connected to the second shielding element 6.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

The present invention relates to a stripper (11) for an operating roll of a rolling stand, in particular a hot-rolling stand, wherein the stripper (11) has a stripper tip (5) for making contact with an operating roll (1) of the rolling stand and a first screening element (8) for screening the material (10) being rolled against cooling water of the rolling stand is provided, wherein a second screening element (6) for screening the first screening element (8) against a thermal loading by the material (10) being rolled is provided.

Description

Abstreifer für eine Arbeitswalze eines Walzgerüsts  Scraper for a work roll of a rolling stand
Technisches Gebiet Technical area
Die vorliegende Erfindung betrifft einen Abstreifer für eine Arbeitswalze Walzgerüsts, insbesondere einer Arbeitswalze eines Warmwalzgerüsts, eine Vorrichtung zum Kühlen einer Arbeitswalze eines Walzgerüstes. The present invention relates to a scraper for a work roll rolling stand, in particular a work roll of a hot rolling stand, an apparatus for cooling a work roll of a rolling stand.
Stand der Technik In Walzgerüsten, insbesondere in Warmwalzgerüsten, werden Abstreifer für die oberen und unteren Arbeitswalzen im Einlauf und im Auslauf der jeweiligen Gerüste eingebaut. Die Abstreifer haben dabei im Walzbetrieb typischerweise ständigen Kontakt zu den Arbeitswalzen. Dieser Kontakt wird jeweils über eine Abstreiferspitze hergestellt, welche die jeweilige Arbeitswalze kontaktiert. Die Abstreifer sind dazu ausgebildet, die Walzgutoberfläche gegen das Walzenkühlwasser abzuschirmen und sind dazu in der Lage, eventuell an den Arbeitswalzen anhaftendes Walzgut von den Arbeitswalzen abzustreifen. PRIOR ART In rolling stands, in particular in hot rolling stands, scrapers for the upper and lower work rolls are installed in the inlet and outlet of the respective stands. In the rolling operation, the scrapers typically have constant contact with the work rolls. This contact is made in each case via a scraper tip, which contacts the respective work roll. The scrapers are adapted to shield the rolling stock surface against the roll cooling water and are capable of scraping any rolling stock adhering to the work rolls from the work rolls.
Die Arbeitswalzen werden während des Walzvorganges einer hohen thermischen Belastung ausgesetzt. Die auf die Arbeitswalzen aufgebrachte Wärme wird dabei hauptsächlich im Kontakt der Arbeitswalzen mit dem Walzgut im Walzspalt übertragen, wobei die eingetragene Wärmeenergie hier noch durch die zusätzlich durch die plastische Formänderung des Walzgutes entwickelte Walzhitze erhöht wird. Weiterhin wird Reibungswärme durch die zwischen Walzgut und Walzen erzeugte Reibung, sowie ebenfalls im Kontaktbereich zwischen Arbeitswalze und den üblicherweise vorgesehenen Stützwalzen in die Arbeitswalzen eingetragen. Weiterhin wird typischerweise auch die Strahlungswärme des Walzgutes im Einlaufbereich und im Auslaufbereich auf die Arbeitswalzen übertragen. The work rolls are subjected to a high thermal load during the rolling process. The heat applied to the work rolls heat is transferred mainly in contact of the work rolls with the rolling stock in the nip, the registered heat energy is increased here by the additionally developed by the plastic deformation of the rolling stock rolling heat. Furthermore, frictional heat is introduced by the friction generated between rolling stock and rolls, as well as also in the contact area between the work roll and the support rollers usually provided in the work rolls. Furthermore, typically the radiant heat of the rolling stock in the inlet area and in the outlet area is transferred to the work rolls.
Um einen vorzeitigen oder übermäßigen Verschleiß der Arbeitswalzen durch die thermische Belastung zu verhindern, ist die Walzenkühlung von erheblicher Bedeutung. Insbesondere wird versucht, durch eine ausreichende Walzenaußenkühlung, insbesondere auf der Auslaufseite, die im Walzspalt in den Oberflächenbereich der Arbeitswalze eingetragene Wärme der Arbeitswalze so früh wie möglich nach dem Verlassen des Walzspaltes wieder zu entziehen, um das Eindringen der Wärme in die Tiefe der Walze möglichst weitgehend und effizient zu verhindern. To prevent premature or excessive wear of the work rolls by the thermal load, the roll cooling is of considerable importance. In particular, it is attempted to withdraw by a sufficient external roll cooling, especially on the outlet side, the registered in the nip in the surface region of the work roll heat of the work roll as early as possible after leaving the nip to the penetration of heat in the depth of the roll as possible largely and efficiently prevent.
Entsprechend wird Kühlwasser so früh wie möglich auf die Arbeitswalzen aufgespritzt. Die Abstreifer sorgen dafür, dass das auf die Arbeitswalzen von außen aufgespritzte Kühlwasser nicht mit dem Walzgut in Kontakt kommt, um eine Abkühlung des Walzgutes und/oder eine Verringerung der Qualität des Walzgutes zu verhindern. Accordingly, cooling water is sprayed onto the work rolls as early as possible. The scrapers ensure that the outside of the work rolls sprayed cooling water does not come into contact with the rolling stock to prevent cooling of the rolling stock and / or a reduction in the quality of the rolling stock.
Da die Walzenaußenkühlung so früh wie möglich nach dem Austritt des Walzgutes aus dem Walzspalt stattfinden soll, sind die Abstreifer so tief wie möglich über dem Walzgut bzw. so nah wie möglich am Walzspalt angeordnet. Teilweise sind die Abstreifer auch Bestandteil der jeweiligen Ein- und Auslaufführungen und sind entsprechend zumindest drehbar oder häufig gar kardanisch gelagert. Der Abstreifer wird an die jeweiligen Arbeitswalzen entweder pneumatisch, hydraulisch oder über eine Beaufschlagung mit einer Anpressmasse angepresst. Since the roll external cooling should take place as early as possible after the exit of the rolling stock from the roll gap, the scrapers are as deep as possible above the rolling stock or as close to the roll gap as possible. Some of the scrapers are also part of the respective inlet and outlet guides and are accordingly at least rotatable or often gimbal stored. The scraper is pressed against the respective work rolls either pneumatically, hydraulically or by an impact with a contact mass.
Da der Abstreifer typischerweise sehr dicht oberhalb der Oberfläche des Walzgutes angeordnet ist, ist er einseitig, nämlich auf dem Walzgut zugewendeten Seite, einer hohen thermischen Belastung ausgesetzt. Auf der dem Walzgut abgewandten Seite hingegen wird der Abstreifer mit dem Kühlwasser beaufschlagt, welches er vom Walzgut forthalten soll. Entsprechend sind die Abstreifer aus dem Stand der Technik auf ihrer einen Seite sehr hohen Temperaturen und auf der anderen Seite Kühlwassertemperaturen ausgesetzt. Hierdurch ergibt sich zwangsläufig eine unterschiedliche thermische Ausdehnung der jeweiligen Seiten des Abstreifers, welche darin resultieren kann, dass sich der Abstreifer wölbt und beispielsweise im Mittenbereich des Walzgutes keine vollständige Abdichtung mehr bereitstellen kann. Since the scraper is typically arranged very close above the surface of the rolling stock, it is on one side, namely on the rolling stock facing side, exposed to high thermal stress. On the other hand, on the side facing away from the rolling stock, the scraper is charged with the cooling water, which he should wegalten from the rolling stock. Accordingly, the On the one hand, scrapers of the prior art are subjected to very high temperatures and, on the other hand, to cooling-water temperatures. This inevitably results in a different thermal expansion of the respective sides of the scraper, which may result in that the scraper buckles and can not provide a complete seal more for example in the central region of the rolling stock.
Abstreifelemente sind beispielsweise aus der DE 10 2008 019 548 A1 sowie aus der EP 0 899 030 A2 bekannt. Stripping elements are known, for example, from DE 10 2008 019 548 A1 and from EP 0 899 030 A2.
Darstellung der Erfindung Presentation of the invention
Entsprechend ist es eine Aufgabe der vorliegenden Erfindung, einen Abstreifer sowie eine Vorrichtung zum Kühlen der Arbeitswalzen eines Walzgerüstes anzugeben, welcher eine verbesserte Abdichtung für das Kühlwasser im Betrieb ermöglicht. Accordingly, it is an object of the present invention to provide a scraper and a device for cooling the work rolls of a rolling stand, which allows an improved seal for the cooling water during operation.
Diese Aufgabe wird gelöst mittels eines Abstreifers mit den Merkmalen des Anspruchs 1 . Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben. This object is achieved by means of a scraper with the features of claim 1. Advantageous embodiments are specified in the subclaims.
Entsprechend weist der Abstreifer für eine Arbeitswalze eines Walzgerüsts, insbesondere eines Warmwalzgerüsts, eine Abstreiferspitze zum Kontaktieren einer Arbeitswalze des Walzgerüsts auf und ein erstes Abschirmelement zum Abschirmen des Walzgutes gegen Kühlwasser des Walzgerüsts ist vorgesehen. Erfindungsgemäß ist ein zweites Abschirmelement zum Abschirmen des ersten Abschirmelementes gegen eine thermische Belastung durch das Walzgut vorgesehen. Durch das Bereitstellen eines ersten Abschirmelementes zum Abschirmen des Walzgutes gegen das Kühlwasser und eines zweiten Abschirmelementes zum Abschirmen des ersten Abschirmelementes gegen eine thermische Belastung durch das Walzgut kann erreicht werden, dass die beiden Abschirmelemente, nämlich das erste Abschirmelement und das zweite Abschirmelement, entsprechend der jeweils vorherrschenden thermischen Bedingungen so angepasst werden können, dass die entsprechende Abstreiferspitze stets in Kontakt mit der jeweiligen Arbeitswalze steht. Das erste und das zweite Abschirmelement sind bevorzugt voneinander beabstandet, bevorzugt in einem Abstand von 0,5cm bis 5cm, bevorzugter in einem Abstand von 1 cm bis 4cm, noch bevorzugter in einem Abstand von 2cm bis 3cm. Auf diese Weise kann eine Abschirmung des ersten Abschirmelements durch das zweite Abschirmelement erreicht werden. Darüber hinaus lässt sich auf diese Weise ein Parallelogrammeffekt erreichen, wenn das erste Abschirmelement und das zweite Abschirmelement durch unterschiedliche Temperatureinwirkung einer unterschiedlichen Temperaturausdehnung unterworfen sind. Accordingly, the scraper for a work roll of a rolling stand, in particular a hot rolling stand, a scraper tip for contacting a work roll of the rolling mill and a first shielding member for shielding the rolling against cooling water of the rolling mill is provided. According to the invention, a second shielding element is provided for shielding the first shielding element against thermal loading by the rolling stock. By providing a first shielding element for shielding the rolling stock against the cooling water and a second shielding element for shielding the first shielding element against thermal stress by the rolling stock, it can be achieved that the two shielding elements, namely the first shielding element and the second shielding element, respectively prevailing thermal conditions can be adjusted so that the corresponding scraper tip is always in contact with the respective work roll. The first and second shield members are preferably spaced apart, preferably at a distance of 0.5cm to 5cm, more preferably at a distance of 1cm to 4cm, even more preferably at a distance of 2cm to 3cm. In this way, a shielding of the first shielding element can be achieved by the second shielding element. In addition, a parallelogram effect can be achieved in this way if the first shielding element and the second shielding element are subjected to a different temperature expansion due to different temperature action.
In einer bevorzugten Weiterbildung ist zwischen dem ersten Abschirmelement und dem zweiten Abschirmelement ein Isolierelement zur thermischen Isolation der beiden Abschirmelemente gegeneinander angeordnet. In a preferred development, an insulating element for thermal insulation of the two shielding elements is arranged between the first shielding element and the second shielding element.
Entsprechend wird das zweite Abschirmelement, welches zur Abschirmung der thermischen Belastung durch das Walzgut dient, mit einer deutlich höheren Temperatur beaufschlagt, als das erste Abschirmelement, welches das Kühlwasser vom Walzgut fern hält. Auf diese Weise kann eine Wölbung des Abstreifers verhindert werden, da eine starke Temperaturdifferenz der unterschiedlichen Seiten innerhalb eines einzigen Materials, so wie im Stand der Technik bekannt, vermieden wird. Entsprechend wölbt sich der Abstreifer gemäß der vorliegenden Erfindung im Betrieb weniger stark bzw. überhaupt nicht mehr, so dass die Abschirmleistung des Abstreifers auch im Bandmittenbereich gezielt und kontrollierbar eingestellt werden kann. Accordingly, the second shielding element, which serves to shield the thermal load from the rolling stock, is subjected to a significantly higher temperature than the first shielding element which keeps the cooling water away from the rolling stock. In this way, bowing of the scraper can be prevented since a large temperature difference of the different sides within a single material, as known in the art, is avoided. Accordingly, the scraper according to the present invention bulges in operation less strong or not at all, so that the shielding performance of the scraper can be set in the band center area targeted and controllable.
In einer besonders bevorzugten Ausgestaltung ist mindestens ein drittes Abschirmelement beabstandet vom ersten Abschirmelement und/oder vom zweiten Abschirmelement vorgesehen und/oder mindestens ein zweites Isolierelement ist zwischen dem dritten Abschirmelement und dem ersten und/oder zweiten Abschirmelement angeordnet. Hieraus ergibt sich bevorzugt für mindestens zwei Abschirmelemente eine Sandwich-Struktur. Der entsprechende mehrteilige Aufbau des Abstreifers in Form eines Sandwich-Aufbaus, insbesondere mit einer innenliegenden Isolierschicht, kann dies erfüllen. Die Isolierschicht trennt dabei die Seite hoher thermischer Belastung von der Seite geringer thermischer Belastung. Bevorzugt werden die beiden Abschirmelemente durch eine Schraubverbindung, bevorzugt unter Verwendung von Abstandshaltern, miteinander verbunden. In a particularly preferred embodiment, at least one third shielding element is provided at a distance from the first shielding element and / or from the second shielding element and / or at least one second insulating element is arranged between the third shielding element and the first and / or second shielding element. This results preferably for at least two shielding a sandwich structure. The corresponding multi-part structure of the scraper in the form of a sandwich construction, in particular with an inner insulating layer, can fulfill this. The insulating layer separates the side of high thermal stress from the side of low thermal stress. Preferably, the two shielding elements are connected to one another by a screw connection, preferably using spacers.
Ein besonders effizienter Aufbau wird erreicht durch mindestens zwei Abschirmelemente, die über Schraubverbindungen und/oder Abstandshalter voneinander beabstandet und miteinander verbunden sind. A particularly efficient construction is achieved by at least two shielding elements, which are spaced apart from one another by screw connections and / or spacers and connected to one another.
In einer besonders bevorzugten Ausführungsvariante ist die Abstreiferspitze als separates Bauteil ausgebildet, welches bevorzugt mittels eines einfachen Verschlusses schnell ausgetauscht werden kann. Durch die Bereitstellung der Abstreiferspitze als separates Bauteil kann zum einen erreicht werden, dass eine defekte und/oder abgenutzte Abstreiferspitze schnell und effizient ausgetauscht werden kann, um den Anlagenbetrieb nicht unnötig lange aufzuhalten, zum anderen kann die Abstreiferspitze aus einem anderen Material hergestellt werden, als das erste und zweite Abschirmelement. Der Abstreifer ist bevorzugt als Ganzes gegenüber dem Walzgerüst verschwenkbar gelagert, so dass ein Kontakt der Abstreiferspitze mit der äußeren Oberfläche der jeweiligen Arbeitswalze sichergestellt ist, auch bei Bewegungen bzw. Verlagerungen der Achse der Arbeitswalze. In a particularly preferred embodiment, the scraper tip is formed as a separate component, which can preferably be quickly replaced by a simple closure. By providing the scraper tip as a separate component can be achieved on the one hand, that a defective and / or worn scraper tip can be replaced quickly and efficiently, not to stop the plant operation unnecessarily long, on the other hand, the scraper tip can be made of a different material than the first and second shielding elements. The scraper is preferably pivotally mounted as a whole relative to the rolling stand, so that a contact of the scraper tip is ensured with the outer surface of the respective work roll, even with movements or displacements of the axis of the work roll.
Um eine zuverlässige Abschirmwirkung zu erreichen, erstreckt sich mindestens ein Abstreifelement einteilig über die Stützlänge einer Arbeitswalze hinweg. In order to achieve a reliable shielding effect, at least one stripping element extends integrally over the support length of a work roll.
Eine Vorrichtung zur Kühlung der Arbeitswalze eines Walzgerüstes mit den Merkmalen des Anspruchs 10 löst ebenfalls die oben gestellte Aufgabe. A device for cooling the work roll of a rolling stand with the features of claim 10 also solves the above object.
Entsprechend umfasst die Vorrichtung zum Kühlen einer Arbeitswalze in einem Walzgerüst eine Kühlwassersprühvorrichtung zum Aufsprühen von Kühlwasser auf die Arbeitswalze, sowie einen oben beschriebenen Abstreifer, wobei der Abstreifer zwischen dem Walzgut und der Kühlwasseraufsprühvorrichtung angeordnet ist. Accordingly, the apparatus for cooling a work roll in a rolling stand comprises a Kühlwassersprühvorrichtung for spraying cooling water on the work roll, and a scraper described above, wherein the scraper between the rolling stock and the Kühlwasseraufsprühvorrichtung is arranged.
Kurze Beschreibung der Figur Brief description of the figure
Bevorzugte weitere Ausführungsformen und Aspekte der vorliegenden Erfindung wird durch die nachfolgende Beschreibung der Figur näher erläutert. Dabei zeigt: Preferred further embodiments and aspects of the present invention will be explained in more detail by the following description of the figure. Showing:
Figur 1 zeigt einen oberen auslaufseitigen Abstreifer gemäß einem Figure 1 shows an upper outlet side scraper according to a
Ausführungsbeispiel der vorliegenden Erfindung. Embodiment of the present invention.
Detaillierte Beschreibung eines bevorzugten Ausführungsbeispiels Detailed Description of a Preferred Embodiment
Im Folgenden wird ein bevorzugtes Ausführungsbeispiele anhand der Figur 1 beschrieben. In the following, a preferred embodiment will be described with reference to FIG.
5  5
Entsprechend ist ein Abstreifer 1 1 vorgesehen, welcher mittels seiner Abstreiferspitze 5 in Kontakt mit einer Arbeitswalze 1 eines nicht explizit gezeigten Walzgerüsts einer Warmwalzstraße steht. Die Arbeitswalze 1 steht in an sich bekannter Weise in Kontakt mit einer Stützwalze 2.  Accordingly, a scraper 1 1 is provided, which is by means of its scraper tip 5 in contact with a work roll 1 of a stand of a hot rolling mill not explicitly shown. The work roll 1 is in a conventional manner in contact with a support roller. 2
10  10
Die Arbeitswalze 1 wird in ebenfalls bekannter Weise gekühlt. Neben einer bekannten Innenkühlung der Arbeitswalze 1 wird sie auch durch Besprühen mit Kühlwasser von außen gekühlt.  The work roll 1 is cooled in a likewise known manner. In addition to a known internal cooling of the work roll 1, it is also cooled by spraying with cooling water from the outside.
15 Bei der Außenkühlung wird, nachdem das Walzgut 10 den Walzspalt verlassen hat, die Arbeitswalze 1 mittels einer Kühlwassersprühvorrichtung 3 gekühlt. Die Kühlwassersprühvorrichtung 3 bringt dabei große Mengen Kühlwasser direkt auf die Arbeitswalze 1 auf. Der Abstreifer 1 1 ist zwischen dem Walzgut 10 und der Kühlwassersprühvorrichtung 3 angeordnet um zu verhindern, dass das WalzgutIn the case of external cooling, after the rolling stock 10 has left the rolling gap, the work roll 1 is cooled by means of a cooling water spraying device 3. The Kühlwassersprühvorrichtung 3 brings this large amounts of cooling water directly on the work roll 1. The scraper 1 1 is disposed between the rolling stock 10 and the Kühlwassersprühvorrichtung 3 to prevent the rolling stock
20 10 in Kontakt mit dem Kühlwasser kommt. Eine Kühlung des Walzgutes 10 ist nämlich innerhalb der jeweiligen Walzstraßen nicht gewünscht. 20 10 comes in contact with the cooling water. A cooling of the rolling stock 10 is namely not desired within the respective rolling mills.
Vorteilhaft ist es, wenn der Abstreifer 1 1 mit seiner Abstreiferspitze 5 derart angeordnet ist, dass das Kühlwasser so schnell wie möglich nach dem Austritt desIt is advantageous if the scraper 1 1 is arranged with its scraper tip 5 such that the cooling water as soon as possible after the exit of the
25 jeweiligen Oberflächenelements aus dem Walzspalt mit der Arbeitswalze 1 in Kontakt kommt. Mit anderen Worten ist die Abstreiferspitze 5 vorteilhaft so nah wie möglich am Walzspalt angeordnet. Durch diese schnelle Kühlung kann erreicht werden, dass die von der Oberfläche der Arbeitswalze 1 aufgenommene Wärme nicht tiefer in die Arbeitswalze 1 bzw. das Volumen der Arbeitswalze eintritt und25 respective surface element comes into contact with the work roll 1 from the nip. In other words, the scraper tip 5 is advantageously arranged as close as possible to the roll gap. By this rapid cooling can be achieved that the heat absorbed by the surface of the work roll 1 does not enter deeper into the work roll 1 or the volume of the work roll and
30 diese entsprechend nicht schädigen kann. Die Abstreiferspitze 5 erstreckt sich vorteilhaft über die gesamte Stützlänge der Arbeitswalze 1 hinweg, um ein gleichmäßiges Abstreifen und eine gleichmäßige Kühlung der Arbeitswalze 1 zu erreichen. Der Abstreifer 1 1 ist über einen Lagerzapfen 4 verschwenkbar gelagert. Die Abstreiferspitze 5 wird an die Arbeitswalze 1 mittels eines pneumatischen Zylinders 12 angedrückt, welche am der Abstreiferspitze 5 entgegengesetzten Ende des Abstreifers 1 1 angeordnet ist. Der Lagerzapfen 4 ist entsprechend zwischen der Abstreiferspitze 5 und dem pneumatischen Zylinder 12 angeordnet. 30 this can not harm accordingly. The scraper tip 5 advantageously extends over the entire support length of the work roll 1, in order to achieve a uniform stripping and a uniform cooling of the work roll 1. The scraper 1 1 is pivotally mounted on a bearing pin 4. The scraper tip 5 is pressed against the work roll 1 by means of a pneumatic cylinder 12 which is arranged on the stripper tip 5 opposite end of the scraper 1 1. The bearing pin 4 is arranged between the stripper tip 5 and the pneumatic cylinder 12 accordingly.
Neben der Abstreiferspitze 5 umfasst der Abstreifer 1 1 ein Abschirmelement 8 zum eigentlichen Abschirmen des Walzgutes 10 gegen das mit der Kühlwassersprühvorrichtung 3 aufgetragene Kühlwasser. Ein zweites Abschirmelement 6 ist vorgesehen, welches zum Abschirmen des ersten Abschirmelementes 8 gegen die thermische Belastung durch das Walzgut 10 dient. Das zweite Abschirmelement 6 ist vom ersten Abschirmelement 8 beabstandet. Mit anderen Worten sind hier zwei Abschirmelemente 8, 6 beabstandet voneinander vorgesehen, wobei das erste Abschirmelement 8 das Walzgut 10 vor dem Kontakt mit dem Kühlwasser aus der Sprühvorrichtung 3 schützt und das zweite Abschirmelement 6 das erste Abschirmelement vor übermäßiger Hitze schützt. In addition to the scraper tip 5, the scraper 1 1 comprises a shielding element 8 for the actual shielding of the rolling stock 10 against the cooling water applied with the cooling water spray device 3. A second shielding element 6 is provided, which serves to shield the first shielding element 8 against the thermal load of the rolling stock 10. The second shielding element 6 is spaced from the first shielding element 8. In other words, two shielding elements 8, 6 are provided here at a distance from one another, the first shielding element 8 protecting the rolling stock 10 from contact with the cooling water from the spraying device 3 and the second shielding element 6 protecting the first shielding element from excessive heat.
Das zweite Abschirmelement 6 ist dabei auf der dem Walzgut 10 zugewandten Seite des Abstreifers 1 1 vorgesehen. Entsprechend wird hier die große Strahlungshitze des Walzgutes 10 durch das zweite Abschirmelement 6 abgeschirmt. Auf diese Weise kann ein übermäßig großer Temperaturgradient in Dickenrichtung des Abschirmelements 8 vermieden werden, wodurch eine nachteilige Hitzeverformung des Abstreifers 1 1 vermieden werden kann. Selbst wenn es in dem vorliegenden Ausführungsbeispiel zu einer Hitzeverformung des ersten Abstreifelements 6 und/oder des zweiten Abstreifelements 8 kommt, so ergibt sich daraus jedoch typischer Weise lediglich eine Parallelogrammverschiebung der beiden Abstreifelemente 6, 8 gegeneinander, welche sofort durch den um den Lagerzapfen 4 verschwenkbaren Abstreifer 1 1 mittels der Anpressmasse 12 ausgeglichen wird. The second shielding element 6 is provided on the rolling stock 10 facing side of the scraper 1 1. Accordingly, the large radiant heat of the rolling stock 10 is shielded by the second shielding element 6 here. In this way, an excessively large temperature gradient in the thickness direction of the shielding element 8 can be avoided, whereby an adverse heat deformation of the scraper 1 1 can be avoided. Even if heat deformation of the first stripping element 6 and / or the second stripping element 8 occurs in the present exemplary embodiment, however, this typically results in only a parallelogram displacement of the two stripping elements 6, 8 against each other, which can be swiveled immediately by the pivot about the journal 4 Scraper 1 1 is balanced by means of the Anpressmasse 12.
Das erste Abschirmelement 8 und das zweite Abschirmelement 6 sind über schematisch angedeutete Befestigungselemente 9 miteinander verbunden. Um einen Abstand zwischen dem ersten Abschirmelement 8 und dem zweiten Abschirmelement 6 bereitzustellen, ist bevorzugt ein Befestigungselement 9, beispielsweise eine Schraubverbindung, in Kombination mit Abstandshalterelementen vorgesehen . In Figur 1 ist weiterhin zwischen dem ersten Abschirmelement 8 und dem zweiten Abschirmelement 6 ein Isolierelement 7 vorgesehen, welche die beiden plattenförmig ausgebildeten Abschirmelemente 8, 6 thermisch voneinander isoliert. Die Abstandshalter in den Befestigungselementen 9 dienen dann auch dazu, dass die Isolierschicht 7 bei Verbindung des ersten Abschirmelementes 8 mit dem zweiten Abschirmelement 6 nicht zerdrückt bzw. zerstört wird. The first shielding element 8 and the second shielding element 6 are connected to each other via schematically indicated fastening elements 9. In order to provide a distance between the first shielding element 8 and the second shielding element 6, a fastening element 9, for example a screw connection, in combination with spacer elements is preferably provided. In Figure 1, an insulating member 7 is further provided between the first shielding element 8 and the second shielding element 6, which thermally insulated from each other the two plate-shaped shielding elements 8, 6. The spacers in the fastening elements 9 then also serve to prevent the insulating layer 7 from being crushed or destroyed when the first shielding element 8 is connected to the second shielding element 6.
Durch die Ausbildung als Sandwich-Struktur kann eine Wölbung des Abstreifers 1 1 im Betrieb aufgrund der unterschiedlichen thermischen Belastung der beiden Seiten des Abstreifers 1 1 weitgehend vermieden werden. Entsprechend wird hier eine stabile und gleichmäßige Abstreifungswirkung durch die Abstreiferspitze 5 bereitgestellt. Due to the design as a sandwich structure, a curvature of the scraper 1 1 in operation due to the different thermal load on the two sides of the scraper 1 1 can be largely avoided. Accordingly, a stable and uniform stripping effect is provided by the stripper tip 5 here.
Neben der in Figur 1 gezeigten Struktur des Abstreifers 1 1 mit einem ersten Abschirmelement 8 und einem zweiten Abschirmelement 6 und dem dazwischen angeordneten Isolierelement 7 sind auch Konstruktionen für einen Abstreifer 1 1 Teil der vorliegenden Erfindung, welche mehr als zwei Abschirmelemente aufweisen, beispielsweise drei oder vier, welche ebenfalls beispielsweise mittels einer Isolierschicht voneinander getrennt und voneinander beabstandet sind. In addition to the structure shown in Figure 1 of the scraper 1 1 with a first shielding element 8 and a second shielding 6 and the interposed insulating member 7 are also constructions for a scraper 1 1 part of the present invention, which more than two shielding have, for example, three or four, which are also separated from each other, for example by means of an insulating layer and spaced from each other.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Arbeitswalze 1 stripper
2 Stützwalze  2 support roller
3 Kühlwassersprühvorrichtung 3 cooling water spray device
4 Lagerzapfen für die Abstreiferlagerung 4 journals for the wiper bearing
5 Abstreiferspitze 5 scraper tip
6 zweites Abschirmelement  6 second shielding
7 Isolierelement  7 insulating element
8 erstes Abschirmelement 8 first shielding element
9 Befestigungselement  9 fastener
10 Walzgut  10 rolling stock
1 1 Abstreifer  1 1 scraper
12 Pneumatik-Zylinder  12 pneumatic cylinders

Claims

Patentansprüche claims
1 . Abstreifer (1 1 ) für eine Arbeitswalze eines Walzgerüsts, insbesondere eines Warmwalzgerüsts, wobei der Abstreifer (1 1 ) eine Abstreiferspitze (5) zum Kontaktieren einer Arbeitswalze (1 ) des Walzgerüsts aufweist und ein erstes Abschirmelement (8) zum Abschirmen des Walzgutes (10) gegen Kühlwasser des Walzgerüsts vorgesehen ist, dadurch gekennzeichnet, dass ein zweites Abschirmelement (6) zum Abschirmen des ersten Abschirmelementes (8) gegen eine thermische Belastung durch das Walzgut (10) vorgesehen ist. 1 . Scraper (1 1) for a work roll of a rolling stand, in particular a hot rolling stand, wherein the scraper (1 1) has a scraper tip (5) for contacting a work roll (1) of the rolling stand and a first shielding member (8) for shielding the rolling stock (10 ) is provided against cooling water of the roll stand, characterized in that a second shielding element (6) for shielding the first shielding element (8) against a thermal load by the rolling stock (10) is provided.
2. Abstreifer gemäß Anspruch 1 , wobei das erste Abschirmelement (8) vom zweiten Abschirmelement (6) beabstandet ist, bevorzugt in einem Abstand von 0,5cm bis 5cm, bevorzugter in einem Abstand von 1 cm bis 4cm, noch bevorzugter in einem Abstand von 2cm bis 3cm. Scraper according to claim 1, wherein the first shielding element (8) is spaced from the second shielding element (6), preferably at a distance of 0.5cm to 5cm, more preferably at a distance of 1cm to 4cm, more preferably at a distance of 2cm to 3cm.
3. Abstreifer gemäß Anspruch 1 oder 2, wobei zwischen dem ersten Abschirmelement (8) und dem zweiten Abschirmelement (6) ein Isolierelement (7) zur thermischen Isolation der beiden Abschirmelemente (6, 8) gegeneinander angeordnet ist. 3. Scraper according to claim 1 or 2, wherein between the first shielding member (8) and the second shielding member (6) an insulating member (7) for thermal insulation of the two shielding elements (6, 8) is arranged against each other.
4. Abstreifer gemäß einem der vorstehenden Ansprüche, wobei mindestens ein drittes Abschirmelement beabstandet vom ersten Abschirmelement (8) und/oder vom zweiten Abschirmelement (6) vorgesehen ist und/oder mindestens ein zweites Isolierelement zwischen dem dritten Abschirmelennent und dem ersten und/oder zweiten Abschirmelement angeordnet ist. 4. Scraper according to one of the preceding claims, wherein at least a third shielding element spaced from the first shielding element (8) and / or the second shielding element (6) is provided and / or at least a second insulating element between the third Abschirmelennent and the first and / or second shielding element is arranged.
5. Abstreifer gemäß einem der vorstehenden Ansprüche, wobei mindestens 5 zwei Abschirmelemente (6, 8) eine Sandwich-Struktur miteinander ausbilden. 5. Scraper according to one of the preceding claims, wherein at least 5 two shielding elements (6, 8) form a sandwich structure with each other.
6. Abstreifer gemäß einem der vorstehenden Ansprüche, wobei mindestens zwei Abschirmelemente (6, 8) über Schraubverbindungen und/oder6. Scraper according to one of the preceding claims, wherein at least two shielding elements (6, 8) via screw connections and / or
10 Abstandshalter voneinander beabstandet miteinander verbunden sind. 10 spacers spaced from each other are connected.
7. Abstreifer gemäß einem der vorstehenden Ansprüche, wobei die Abstreiferspitze (5) als separates Bauteil ausgebildet ist und bevorzugt mit dem ersten Abschirmelement (8) und/oder dem zweiten Abschirmelement7. Scraper according to one of the preceding claims, wherein the scraper tip (5) is designed as a separate component and preferably with the first shielding element (8) and / or the second shielding element
15 (7) verbunden ist. 15 (7) is connected.
8. Abstreifer gemäß einem der vorstehenden Ansprüche, wobei die Abschirmelemente (6, 8) gegenüber dem Walzgerüst verschwenkbar gelagert sind. 8. scraper according to one of the preceding claims, wherein the shielding (6, 8) are pivotally mounted relative to the rolling stand.
20  20
9. Abstreifer gemäß einem der vorstehenden Ansprüche, wobei sich mindestens ein Abstreifelement (6, 8) einteilig über die Stützlänge einer Arbeitswalze (1 ) hinweg erstreckt.  9. Scraper according to one of the preceding claims, wherein at least one scraper element (6, 8) extends integrally over the support length of a work roll (1) away.
25 10. Vorrichtung zum Kühlen einer Arbeitswalze (1 ) eines Walzgerüsts, umfassend eine Kühlwassersprühvorrichtung (3) zum Aufsprühen von Kühlwasser auf die Arbeitswalze (1 ), sowie einen Abstreifer (1 1 ) nach einem der vorstehenden Ansprüche, wobei der Abstreifer (1 1 ) zwischen dem Walzgut (10) und der Kühlwasseraufsprühvorrichtung (3) angeordnet10. A device for cooling a work roll (1) of a roll stand, comprising a Kühlwassersprühvorrichtung (3) for spraying cooling water on the work roll (1), and a scraper (1 1) according to one of the preceding claims, wherein the scraper (1 1 ) between the rolling stock (10) and the Kühlwasseraufsprühvorrichtung (3)
30 ist. 30 is.
EP12761924.5A 2011-10-18 2012-09-03 Stripper for an operating roll of a rolling stand Active EP2768622B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011084735A DE102011084735A1 (en) 2011-10-18 2011-10-18 Scraper for a work roll of a rolling stand
PCT/EP2012/067053 WO2013056889A1 (en) 2011-10-18 2012-09-03 Stripper for an operating roll of a rolling stand

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EP2768622A1 true EP2768622A1 (en) 2014-08-27
EP2768622B1 EP2768622B1 (en) 2015-11-18

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EP (1) EP2768622B1 (en)
JP (1) JP2014530108A (en)
KR (1) KR20140063842A (en)
CN (1) CN103889607B (en)
DE (1) DE102011084735A1 (en)
RU (1) RU2567139C1 (en)
WO (1) WO2013056889A1 (en)

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US20140290325A1 (en) 2014-10-02
CN103889607A (en) 2014-06-25
EP2768622B1 (en) 2015-11-18
WO2013056889A1 (en) 2013-04-25
DE102011084735A1 (en) 2013-04-18
JP2014530108A (en) 2014-11-17
KR20140063842A (en) 2014-05-27
RU2567139C1 (en) 2015-11-10
CN103889607B (en) 2016-06-15

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