EP3354362A1 - Method and device for reducing the rolling oil load of a rolled strip - Google Patents

Method and device for reducing the rolling oil load of a rolled strip Download PDF

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Publication number
EP3354362A1
EP3354362A1 EP17201816.0A EP17201816A EP3354362A1 EP 3354362 A1 EP3354362 A1 EP 3354362A1 EP 17201816 A EP17201816 A EP 17201816A EP 3354362 A1 EP3354362 A1 EP 3354362A1
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EP
European Patent Office
Prior art keywords
rolling
gap
edge
scraper
bale surface
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Granted
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EP17201816.0A
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German (de)
French (fr)
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EP3354362B1 (en
Inventor
Axel Barten
Axel Marx
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Achenbach Buschhetten GmbH and Co KG
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Achenbach Buschhetten GmbH and Co KG
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Publication of EP3354362A1 publication Critical patent/EP3354362A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • B21B45/0275—Cleaning devices
    • B21B45/0278—Cleaning devices removing liquids
    • B21B45/0284—Cleaning devices removing liquids removing lubricants
    • 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
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass

Definitions

  • the present invention relates to a method for reducing the rolling stock load of a rolled strip conveyed by a rolling mill, in which a scraper disposed on a strip discharge side of the rolling mill is provided with a scraper edge for abutting against a bale surface of an upper work roll defining the nip.
  • the present invention relates to an apparatus for reducing the rolling stock load of a rolled strip conveyed by a rolling mill nip, comprising a stripper disposed on a strip discharge side of the rolling mill having a stripper edge opposing a bale surface of an upper work roll defining the nip for abutting against the bale surface.
  • scrapers are used in particular in cooperation with the upper, but also in cooperation with the lower work roll.
  • the scrapers are typically in rolling contact with the work roll, with a scraper edge of the work roll Scraper rests against a bale surface of the work roll.
  • the scrapers serve to strip off the work rolls adhering to the work rolls and to prevent rolling oil applied to the surface of the rolled strip from being applied to the bale surface of the work roll by means of a rolling oil applied above the stripper.
  • a scraper of the type mentioned is from the EP 2 768 622 A1 known.
  • a complex partitioning element Compared to a scraper, in particular because of the compressed air supply, a complex partitioning element must be arranged at a defined distance from the bale surface in order to achieve the desired function in order to form the required injector-like flow channel through the gap formed thereby.
  • the object of the present invention is to propose a method and a device for reducing the rolling stock of a rolled strip, such that a scraper which is of a simpler design compared to a partition element can be used with an improved efficiency.
  • the inventive method has the features of claim 1.
  • the scraper is modified to form a conveying gap having a gap width d for rolling oil adhering to the bale surface as a function of a parameter influencing the rolling process or the rolling result in its relative arrangement to the bale surface.
  • the invention is based on the finding that, in particular on the strip outlet side, rolling oil can not only reach the surface of the rolled strip from an area of the bale surface, above which the rolling oil is applied, but also a substantial proportion of the rolling stock of the rolling stock Rolling strip on the strip outlet side is due to the fact that leads from the strip inlet side into the nip with retracted rolling oil to an additional rolling load.
  • This rolling oil which is transported through the roll gap and adheres to the bale surface, is detached from the bale surface by a wiper which bears against the leading edge on the bale surface and reaches the surface of the rolled strip.
  • the natural barrier effect of the upwardly funded rolling oil film can be used and on the other hand, an impact on the surface of the rolled strip by the due to the centrifugal force detached from the ball surface rolling oil film is prevented.
  • the formation of the rolling oil film of a variety of parameters, in particular rotational speed of the work rolls, viscosity of the rolling oil, roughness of the bale surface of the work rolls and thermal expansion of the work rolls bales depends, is provided according to the invention that the gap width d of the conveying gap in dependence on at least one Rolling or influencing the rolling result parameter is changed in its relative arrangement to the bale surface. In this case, a reduction of the working roll diameter due to wear of the bale surface can be considered.
  • the gap width of the conveying gap during the rolling operation is adjusted such that a rolling oil film adhering to the bale surface in the region between the nip and the wiper edge is conveyed through the conveying nip to a discharge area of the bale surface above a rear side of the wiper.
  • the gap width of the conveying nip is reduced to zero during an interruption of the rolling operation for abutment of the wiper edge against the bale surface, so that the wiper can be used in a conventional manner to remove residues deposited on the bale surface.
  • the nip width of the conveying nip is changed during acceleration and / or deceleration of the work rolls in order to continuously optimize the nip width during acceleration or deceleration.
  • the change takes place continuously.
  • the rolling stock load can be used as a controlled variable.
  • the gap width of the conveying gap is preferably changed as a function of the rolling speed and / or the roughness of the ball surface and / or the viscosity of the rolling oil.
  • the device according to the invention has the features of claim 7.
  • the scraper for adjusting a conveying gap between the scraper edge of the scraper and the bale surface is provided with an adjusting device which is connected for acting on the adjusting with a manipulated variable with a control device which predetermines the manipulated variable in dependence on a parameter influencing the rolling process or the rolling result ,
  • the adjusting device allows both a stop position of the wiper edge of the scraper to bear the scraper edge against the bale surface of the work roll and a distance position for setting a maximum gap width of the formed between the scraper edge and the bale surface conveying gap.
  • control device is provided with a sensor device for detecting the parameter, an automated operation of the device can take place.
  • the sensor device serves to detect a parameter characterizing the amount of rolling oil on the surface of the rolled strip.
  • the scraper function can be particularly effective when conditioning the leading edge of the scraper against the bale surface.
  • Fig. 1 shows a schematic representation of a two nip 10 limiting work rolls 11, 12 of a rolling mill 13, which are arranged between two support rollers 14, 15.
  • a rolled strip 16 is conveyed, wherein on a strip outlet side 17 in the case of the illustrated embodiment, only above the rolled strip, a scraper 18 is provided which is arranged with a preferably interchangeable on the scraper 18 arranged scraper edge 19 opposite a bale surface 20 of the upper work roll 11 is.
  • the scraper 18 is provided with an adjusting device 21, which in the present case comprises a roller frame 22 arranged on a linear adjustment 23, which allows the longitudinal adjustment of a splash guard 24, at the lower end of the scraper 18 to a Swivel joint 25 is pivotally mounted.
  • the adjusting device 21 of the scraper 18 comprises a pivoting device 26 which is formed from a arranged on a bottom 27 of the splash guard 24 linear adjustment 28 which acts on a connected to the scraper 18 pivoting lever 29.
  • the adjusting device 21 allows a relative adjustment of the scraper 18 relative to the upper work roll 11, such that both the distance a of the scraper edge 19 against the rolled strip 16 and the gap width d formed between the scraper edge 19 and the bale surface 20 of the upper work roll 11 conveying gap 38th is changeable.
  • the position of the discharge area 37 on the bale surface 20 varies depending on the process parameters of the rolling process as well as surface parameters of the rolls and in particular the characteristics of the rolling oil characterizing parameters, such as the surface roughness of the work roll or Viscosity of the rolling oil.
  • variable in their relative position relative to the bale surface 20 of the work roll 11 scraper edge 19 allows the position of the scraper edge 19 both in terms of the distance a from the belt surface 34 and with respect to the gap width d in the to adapt to the prevailing conditions of the rolling process.
  • the gap width d of a conveying gap 38 formed between the wiper edge 19 and the bale surface 20 can on the one hand be set sufficiently low, so that a discharge quantity that runs off the bale surface 20 does not or only with a small proportion reaches the strip surface 34 and, on the other hand, set it to be sufficiently large be to allow that passed through the nip 10 on the tape inlet side 17 rolling oil film 45 is conveyed through the conveying gap 38 through to the discharge area 37 above a rear side 39 of the scraper 18 and derived from there by the preferably channel-shaped scraper 18 targeted can be.
  • one of the rotational speed of the work rolls 11, 12 dependent adjustment of the conveying gap 38 is particularly advantageous to approximately the conveying gap 38 during the acceleration and deceleration of the work rolls 11, 12 changing position of the discharge area 37 and a as a result of changes in the centrifugal force, the layer thickness of the rolling oil film adhering to the ball surface 20 is continuously adjusted.
  • the wiper edge 19 can advantageously be moved to rest against the bale surface 20 in order to clean the bale surface 20.
  • Fig. 2 shows that in Fig. 1 shown rolling mill 13, wherein in addition to the arranged above the rolling belt 16 on the belt outlet side 17 scraper 18 below the rolling belt 16, a further scraper 40 is provided which cooperates with a bale surface 41 of the lower work roll 12 in a similar function as the scraper 18.
  • the scraper 40 is arranged on a pivoting table 42, which serves in particular at the same time for the installation of an air cushion conveyor 43.
  • Fig. 2 shows a downstream on the strip outlet side 17 in the strip running direction adjacent to the scrapers 18, 40 arranged sensor device 44 which allows in the present case, both on the top of the rolled strip 16 and on the underside of the rolled strip 16, the measurement of the amount of rolling oil present on the respective surface From this, a manipulated variable for a control device acting on the adjusting device 21 of the scrapers 18, 40 is generated.

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

Abstract

Verfahren zur Reduzierung der Walzöllast eines durch einen Walzspalt (10) eines Walzwerks (13) geförderten Walzbandes (16), bei dem ein auf einer Bandauslaufseite (17) des Walzwerks (13) angeordneter, mit einer Abstreiferkante (19) zur Anlage gegen eine Ballenoberfläche (20) einer den Walzspalt (10) begrenzenden oberen Arbeitswalze (11) versehener Abstreifer (18) zur Ausbildung eines Förderspaltes (38) mit einer Spaltbreite d für an der Ballenoberfläche (20) haftendes Walzöl in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter in seiner Relativanordnung zur Ballenoberfläche (20) verändert wird.Method for reducing the rolling stock load of a rolled strip (16) conveyed through a roll gap (10) of a rolling mill (13), wherein a stripper edge (17) of the rolling mill (13) is arranged with a stripper edge (19) for bearing against a bale surface (20) a scraper (18) provided with an upper work roll (11) defining the nip (10) for forming a conveying nip (38) having a nip width d for rolling oil adhering to the bale surface (20) in response to a rolling or rolling result Parameter in its relative arrangement to the bale surface (20) is changed.

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Reduzierung der Walzöllast eines durch einen Walzspalt eines Walzwerks geförderten Walzbandes, bei dem ein auf einer Bandauslaufseite des Walzwerks angeordneter, mit einer Abstreiferkante zur Anlage gegen eine Ballenoberfläche einer den Walzspalt begrenzenden oberen Arbeitswalze versehener Abstreifer verwendet wird. Darüber hinaus betrifft die vorliegende Erfindung eine Vorrichtung zur Reduzierung der Walzöllast einer durch einen Walzspalt eines Walzwerks geförderten Walzbandes, umfassend einen auf einer Bandauslaufseite des Walzwerks angeordneten Abstreifer, der gegenüberliegend einer Ballenoberfläche einer den Walzspalt begrenzenden oberen Arbeitswalze eine Abstreiferkante zur Anlage gegen die Ballenoberfläche aufweist.The present invention relates to a method for reducing the rolling stock load of a rolled strip conveyed by a rolling mill, in which a scraper disposed on a strip discharge side of the rolling mill is provided with a scraper edge for abutting against a bale surface of an upper work roll defining the nip. Moreover, the present invention relates to an apparatus for reducing the rolling stock load of a rolled strip conveyed by a rolling mill nip, comprising a stripper disposed on a strip discharge side of the rolling mill having a stripper edge opposing a bale surface of an upper work roll defining the nip for abutting against the bale surface.

Bei Walzwerken werden Abstreifer insbesondere im Zusammenwirken mit der oberen, aber auch im Zusammenwirken mit der unteren Arbeitswalze eingesetzt. Die Abstreifer haben typischerweise im Walzbetrieb ständigen Kontakt zu der Arbeitswalze, wobei eine Abstreiferkante der Abstreifer gegen eine Ballenoberfläche der Arbeitswalze anliegt. Die Abstreifer dienen insbesondere dazu an den Arbeitswalzen anhaftendes Walzgut von den Arbeitswalzen abzustreifen und zu verhindern, dass mittels einer oberhalb der Abstreifer angeordneten Walzölbeaufschlagung auf die Ballenoberfläche der Arbeitswalze aufgebrachtes Walzöl auf die Oberfläche des Walzbandes gelangt. Ein Abstreifer der eingangs genannten Art ist aus der EP 2 768 622 A1 bekannt.In rolling mills scrapers are used in particular in cooperation with the upper, but also in cooperation with the lower work roll. The scrapers are typically in rolling contact with the work roll, with a scraper edge of the work roll Scraper rests against a bale surface of the work roll. In particular, the scrapers serve to strip off the work rolls adhering to the work rolls and to prevent rolling oil applied to the surface of the rolled strip from being applied to the bale surface of the work roll by means of a rolling oil applied above the stripper. A scraper of the type mentioned is from the EP 2 768 622 A1 known.

Aus der EP 0 662 359 A1 ist der Einsatz eines Abschottungselementes bekannt, das in einer der Position eines Abstreifers entsprechenden Relativposition gegenüber der Ballenoberfläche der oberen Arbeitswalze angeordnet ist, wobei zwischen einer Vorderkante des Abschottungselements und der Ballenoberfläche ein Spalt ausgebildet ist, der einen parallel zur Ballenoberfläche verlaufenden Strömungskanal ausbildet, in den aus einer an der Vorderkante angeordneten Düse des Abschottungselements eine Druckluftströmung gelangt, die in Rotationsrichtung der Arbeitswalze an der Ballenoberfläche entlang strömt und verhindern soll, dass von der Ballenoberfläche der Arbeitswalze ablaufendes Walzöl auf die Oberfläche des Walzbandes gelangt.From the EP 0 662 359 A1 is the use of a Abschottungselementes known, which is arranged in a position corresponding to a position of a scraper relative to the bale surface of the upper work roll, wherein between a front edge of the partitioning element and the bale surface, a gap is formed, which forms a parallel to the bale surface extending flow channel in the From a front edge arranged on the nozzle of the foreclosure element passes a compressed air flow, which flows in the direction of rotation of the work roll along the bale surface and to prevent running of the bale surface of the work roll rolling oil reaches the surface of the rolled strip.

Das im Vergleich zu einem Abstreifer insbesondere wegen der Druckluftzuführung komplex ausgestaltete Abschottungselement muss zur Erzielung der gewünschten Funktion in einem definierten Abstand gegenüber der Ballenoberfläche angeordnet werden, um durch den dabei ausgebildeten Spalt den erforderlichen injektorartigen Strömungskanal auszubilden.Compared to a scraper, in particular because of the compressed air supply, a complex partitioning element must be arranged at a defined distance from the bale surface in order to achieve the desired function in order to form the required injector-like flow channel through the gap formed thereby.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren sowie eine Vorrichtung zur Reduzierung der Walzöllast eines Walzbandes vorzuschlagen, derart, dass ein im Vergleich zu einem Abschottungselement einfacher ausgebildeter Abstreifer mit einem verbesserten Wirkungsgrad einsetzbar ist.The object of the present invention is to propose a method and a device for reducing the rolling stock of a rolled strip, such that a scraper which is of a simpler design compared to a partition element can be used with an improved efficiency.

Zur Lösung dieser Aufgabe weist das erfindungsgemäße Verfahren die Merkmale des Anspruchs 1 auf.To solve this problem, the inventive method has the features of claim 1.

Erfindungsgemäß wird der Abstreifer zur Ausbildung eines Förderspaltes mit einer Spaltbreite d für an der Ballenoberfläche haftendes Walzöl in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter in seiner Relativanordnung zur Ballenoberfläche verändert.According to the invention, the scraper is modified to form a conveying gap having a gap width d for rolling oil adhering to the bale surface as a function of a parameter influencing the rolling process or the rolling result in its relative arrangement to the bale surface.

Der Erfindung liegt die Erkenntnis zugrunde, dass insbesondere auf der Bandauslaufseite Walzöl tatsächlich nicht nur von einem oberhalb des Abstreifers angeordneten Bereich der Ballenoberfläche, auf den das Walzöl aufgebracht wird, auf die Oberfläche des Walzbandes gelangen kann, sondern darüber hinaus ein wesentlicher Anteil der Walzöllast des Walzbandes auf der Bandauslaufseite dadurch bedingt ist, dass von der Bandeinlaufseite in den Walzspalt mit eingezogenes Walzöl zu einer zusätzlichen Walzöllast führt. Dieses durch den Walzspalt transportierte Walzöl, das an der Ballenoberfläche haftet, wird von einem mit der Vorderkante an der Ballenoberfläche anliegenden Abstreifer von der Ballenoberfläche abgelöst und gelangt auf die Oberfläche des Walzbandes.The invention is based on the finding that, in particular on the strip outlet side, rolling oil can not only reach the surface of the rolled strip from an area of the bale surface, above which the rolling oil is applied, but also a substantial proportion of the rolling stock of the rolling stock Rolling strip on the strip outlet side is due to the fact that leads from the strip inlet side into the nip with retracted rolling oil to an additional rolling load. This rolling oil, which is transported through the roll gap and adheres to the bale surface, is detached from the bale surface by a wiper which bears against the leading edge on the bale surface and reaches the surface of the rolled strip.

In Versuchen hat sich nun herausgestellt, dass bei einer Einstellung eines Förderspaltes zwischen der Abstreiferkante des Abstreifers und der Ballenoberfläche ein an der Ballenoberfläche haftender Walzölfilm durch den Förderspalt hindurch an der Abstreiferkante vorbei gefördert wird, auf die von der Oberfläche des Walzbandes abgewandte Rückseite des Abstreifers gelangt und schließlich infolge der Zentrifugalkraft von der Ballenoberfläche abgeschleudert wird. Dabei ist die Förderrichtung des durch den Walzspalt auf die Bandauslaufseite gelangten und an der Ballenoberfläche haftenden Walzölfilms entgegengesetzt der Abflussrichtung einer von der Ballenoberfläche schwerkraftbedingt ablaufenden Walzölmenge, sodass der durch den Förderspalt aufwärts geförderte Walzölfilm dem abwärts gerichteten Walzölabfluss entgegenwirkt und eine natürliche Sperrwirkung erzeugt.In experiments, it has now been found that when setting a conveying gap between the wiper edge of the scraper and the bale surface adhering to the bale surface rolling oil film is conveyed through the conveying gap to the scraper edge, passes to the side remote from the surface of the rolled strip back of the scraper and finally thrown off the bale surface due to centrifugal force. In this case, the conveying direction of passing through the nip on the tape outlet side and adhering to the bale surface rolling oil film is opposite to the direction of flow of a ball surface by gravity running rolling oil amount, so that the subsidized by the conveying gap upwards Rolling oil film counteracts the downhill rolling oil drain and produces a natural barrier effect.

Durch eine geeignete Einstellung des zwischen der Abstreiferkante des Abstreifers und der Ballenoberfläche ausgebildeten Förderspalts lässt sich nun erreichen, dass einerseits die natürliche Sperrwirkung des aufwärts geförderten Walzölfilms genutzt werden kann und andererseits eine Beaufschlagung der Oberfläche des Walzbandes durch den aufgrund der Zentrifugalkraft von der Ballenoberfläche abgelösten Walzölfilm verhindert wird. Da die Ausbildung des Walzölfilms von den verschiedensten Parametern, wie insbesondere Rotationsgeschwindigkeit der Arbeitswalzen, Viskosität des Walzöls, Rauigkeit der Ballenoberfläche der Arbeitswalzen und thermische Ausdehnung der Arbeitswalzenballen, abhängig ist, ist erfindungsgemäß vorgesehen, dass die Spaltbreite d des Förderspalts in Abhängigkeit von zumindest einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter in seiner Relativanordnung zur Ballenoberfläche verändert wird. Dabei kann auch eine Reduzierung des Arbeitswalzendurchmessers infolge einen Abnutzung der Ballenoberfläche berücksichtigt werden.By a suitable adjustment of the formed between the wiper edge of the scraper and the bale surface conveying gap can now be achieved, on the one hand, the natural barrier effect of the upwardly funded rolling oil film can be used and on the other hand, an impact on the surface of the rolled strip by the due to the centrifugal force detached from the ball surface rolling oil film is prevented. Since the formation of the rolling oil film of a variety of parameters, in particular rotational speed of the work rolls, viscosity of the rolling oil, roughness of the bale surface of the work rolls and thermal expansion of the work rolls bales, depends, is provided according to the invention that the gap width d of the conveying gap in dependence on at least one Rolling or influencing the rolling result parameter is changed in its relative arrangement to the bale surface. In this case, a reduction of the working roll diameter due to wear of the bale surface can be considered.

Gemäß einer bevorzugten Variante des Verfahrens wird die Spaltbreite des Förderspaltes während des Walzbetriebs derart eingestellt, dass eine an der Ballenoberfläche im Bereich zwischen dem Walzspalt und der Abstreiferkante haftender Walzölfilm durch den Förderspalt bis in einen Abwurfbereich der Ballenoberfläche oberhalb einer Rückseite des Abstreifers gefördert wird.According to a preferred variant of the method, the gap width of the conveying gap during the rolling operation is adjusted such that a rolling oil film adhering to the bale surface in the region between the nip and the wiper edge is conveyed through the conveying nip to a discharge area of the bale surface above a rear side of the wiper.

Vorzugsweise wird die Spaltbreite des Förderspaltes während einer Unterbrechung des Walzbetriebs zur Anlage der Abstreiferkante gegen die Ballenoberfläche auf Null reduziert, sodass der Abstreifer in konventioneller Weise zur Entfernung von auf der Ballenoberfläche abgelagerten Rückständen nutzbar ist.Preferably, the gap width of the conveying nip is reduced to zero during an interruption of the rolling operation for abutment of the wiper edge against the bale surface, so that the wiper can be used in a conventional manner to remove residues deposited on the bale surface.

Vorzugsweise wird die Spaltbreite des Förderspaltes während der Beschleunigung und/oder dem Abbremsen der Arbeitswalzen verändert, um die Spaltbreite während des Beschleunigens beziehungsweise Abbremsen kontinuierlich zu optimieren. Besonders vorzugsweise erfolgt die Veränderung kontinuierlich.Preferably, the nip width of the conveying nip is changed during acceleration and / or deceleration of the work rolls in order to continuously optimize the nip width during acceleration or deceleration. Particularly preferably, the change takes place continuously.

Wenn die Spaltbreite des Förderspaltes in Abhängigkeit von der in Bandlaufrichtung stromabwärts gemessenen Walzölmenge verändert wird, kann die Walzöllast als Regelgröße verwendet werden.When the nip width of the conveying nip is changed depending on the amount of rolling oil measured downstream in the direction of tape travel, the rolling stock load can be used as a controlled variable.

Vorzugsweise wird die Spaltbreite des Förderspaltes in Abhängigkeit von der Walzgeschwindigkeit und/oder der Rauheit der Ballenoberfläche und/oder der Viskosität des Walzöls verändert.The gap width of the conveying gap is preferably changed as a function of the rolling speed and / or the roughness of the ball surface and / or the viscosity of the rolling oil.

Die erfindungsgemäße Vorrichtung weist die Merkmale des Anspruchs 7 auf.The device according to the invention has the features of claim 7.

Erfindungsgemäß ist der Abstreifer zur Einstellung eines Förderspaltes zwischen der Abstreiferkante des Abstreifers und der Ballenoberfläche mit einer Einstelleinrichtung versehen, die zur Beaufschlagung der Einstelleinrichtung mit einer Stellgröße mit einer Steuereinrichtung verbunden ist, welche die Stellgröße in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter vorgibt.According to the invention, the scraper for adjusting a conveying gap between the scraper edge of the scraper and the bale surface is provided with an adjusting device which is connected for acting on the adjusting with a manipulated variable with a control device which predetermines the manipulated variable in dependence on a parameter influencing the rolling process or the rolling result ,

Vorzugsweise ermöglicht die Einstelleinrichtung sowohl eine Anschlagstellung der Abstreiferkante des Abstreifers zur Anlage der Abstreiferkante gegen die Ballenoberfläche der Arbeitswalze als auch eine Distanzstellung zur Einstellung einer maximalen Spaltbreite des zwischen der Abstreiferkante und der Ballenoberfläche ausgebildeten Förderspaltes.Preferably, the adjusting device allows both a stop position of the wiper edge of the scraper to bear the scraper edge against the bale surface of the work roll and a distance position for setting a maximum gap width of the formed between the scraper edge and the bale surface conveying gap.

Wenn die Steuereinrichtung mit einer Sensoreinrichtung zur Erfassung des Parameters versehen ist, kann ein automatisierter Betrieb der Vorrichtung erfolgen.If the control device is provided with a sensor device for detecting the parameter, an automated operation of the device can take place.

Vorzugsweise dient die Sensoreinrichtung zur Erfassung eines die Walzölmenge auf der Oberfläche des Walzbandes charakterisierenden Parameters.Preferably, the sensor device serves to detect a parameter characterizing the amount of rolling oil on the surface of the rolled strip.

Wenn die Kontaktkante des Abstreifers eine abrasive oder als Schneidkante ausgebildete Oberfläche aufweist, kann die Abstreiferfunktion bei Anlage der Vorderkante des Abstreifers gegen die Ballenoberfläche besonders wirksam erfolgen.If the contact edge of the scraper has an abrasive or designed as a cutting edge surface, the scraper function can be particularly effective when conditioning the leading edge of the scraper against the bale surface.

Nachfolgend wird eine bevorzugte Ausführungsform der Erfindung anhand der Zeichnung näher erläutert.Hereinafter, a preferred embodiment of the invention will be explained in more detail with reference to the drawing.

Es zeigen:

Fig. 1
eine Ausführungsform mit einem oberhalb des Walzbandes angeordneten Abstreifer;
Fig. 2
eine Ausführungsform mit einem oberhalb des Walzbandes angeordneten Abstreifer und einem unterhalb des Walzbandes angeordneten Abstreifer
Show it:
Fig. 1
an embodiment with an above the rolled strip scraper;
Fig. 2
an embodiment with an above the rolled strip scraper and arranged below the rolled strip scraper

Fig. 1 zeigt in schematischer Darstellung zwei einen Walzspalt 10 begrenzende Arbeitswalzen 11, 12 eines Walzwerks 13, die zwischen zwei Stützwalzen 14, 15 angeordnet sind. Durch den Walzspalt 10 wird ein Walzband 16 gefördert, wobei auf einer Bandauslaufseite 17 im Fall des dargestellten Ausführungsbeispiels lediglich oberhalb des Walzbandes ein Abstreifer 18 vorgesehen ist, der mit einer vorzugsweise auswechselbar am Abstreifer 18 angeordneten Abstreiferkante 19 gegenüberliegend einer Ballenoberfläche 20 der oberen Arbeitswalze 11 angeordnet ist. Fig. 1 shows a schematic representation of a two nip 10 limiting work rolls 11, 12 of a rolling mill 13, which are arranged between two support rollers 14, 15. Through the nip 10 a rolled strip 16 is conveyed, wherein on a strip outlet side 17 in the case of the illustrated embodiment, only above the rolled strip, a scraper 18 is provided which is arranged with a preferably interchangeable on the scraper 18 arranged scraper edge 19 opposite a bale surface 20 of the upper work roll 11 is.

Der Abstreifer 18 ist mit einer Einstelleinrichtung 21 versehen, die im vorliegenden Fall eine an einem Walzgestell 22 angeordnete Linearverstellung 23 umfasst, die die Längsverstellung eines Spritzschutzbleches 24 ermöglicht, an dessen unterem Ende der Abstreifer 18 um ein Schwenkgelenk 25 verschwenkbar angeordnet ist. Zur Schwenkverstellung des Abstreifers 18 gegenüber dem Spritzschutzblech 24 umfasst die Einstelleinrichtung 21 des Abstreifers 18 eine Schwenkeinrichtung 26, die aus einer an einer Unterseite 27 des Spritzschutzbleches 24 angeordneten Linearverstellung 28 gebildet ist, welche auf eine mit dem Abstreifer 18 verbundenen Schwenkhebel 29 wirkt. Die Einstelleinrichtung 21 ermöglicht eine Relativverstellung des Abstreifers 18 gegenüber der oberen Arbeitswalze 11, derart, dass sowohl der Abstand a der Abstreiferkante 19 gegenüber dem Walzband 16 als auch die Spaltbreite d eines zwischen der Abstreiferkante 19 und der Ballenoberfläche 20 der oberen Arbeitswalze 11 ausgebildeten Förderspaltes 38 veränderbar ist.The scraper 18 is provided with an adjusting device 21, which in the present case comprises a roller frame 22 arranged on a linear adjustment 23, which allows the longitudinal adjustment of a splash guard 24, at the lower end of the scraper 18 to a Swivel joint 25 is pivotally mounted. For pivotal adjustment of the scraper 18 relative to the splash guard 24, the adjusting device 21 of the scraper 18 comprises a pivoting device 26 which is formed from a arranged on a bottom 27 of the splash guard 24 linear adjustment 28 which acts on a connected to the scraper 18 pivoting lever 29. The adjusting device 21 allows a relative adjustment of the scraper 18 relative to the upper work roll 11, such that both the distance a of the scraper edge 19 against the rolled strip 16 and the gap width d formed between the scraper edge 19 and the bale surface 20 of the upper work roll 11 conveying gap 38th is changeable.

Durch die Pfeile 30 und 31 ist in Fig. 1 eine Beaufschlagung der Ballenoberfläche 20 der Arbeitswalze 11 mit Walzöl angedeutet, das auf der Ballenoberfläche 20 von einer Bandeinlaufseite 33 des Walzwerks 13 durch einen im Walzspalt 10 zwischen der Ballenoberfläche 20 und einer Bandoberfläche 34 des Walzbandes 16 gebildeten Keilspalt 35 hindurch zur Bandauslaufseite 17 gelangt und zunächst an der Ballenoberfläche 20 haften bleibt bis der Walzölfilm 45 schließlich in einen Abwurfbereich 37 der Ballenoberfläche 20 aufgrund der auf den Walzölfilm 45 einwirkenden Fliehkräfte zumindest teilweise von der Ballenoberfläche 20 abgeschleudert wird.By the arrows 30 and 31 is in Fig. 1 an action on the bale surface 20 of the work roll 11 indicated by rolling oil, which passes on the bale surface 20 from a band inlet side 33 of the rolling mill 13 through a nip formed in the nip 10 between the bale surface 20 and a belt surface 34 of the rolled strip 16 to the belt outlet side 17 and first adheres to the bale surface 20 until the rolling oil film 45 is finally thrown off at least partially from the bale surface 20 into a discharge area 37 of the bale surface 20 due to the centrifugal forces acting on the rolling oil film 45.

Wie sich in Versuchen herausgestellt hat, variiert die Position des Abwurfbereichs 37 auf der Ballenoberfläche 20 in Abhängigkeit von den Prozessparametern des Walzvorgangs sowie auch in Abhängigkeit von Oberflächenparametern der Walzen und insbesondere den die Eigenschaften des Walzöls charakterisierenden Parametern, wie beispielsweise die Oberflächenrauheit der Arbeitswalze oder die Viskosität des Walzöls.As has been found in experiments, the position of the discharge area 37 on the bale surface 20 varies depending on the process parameters of the rolling process as well as surface parameters of the rolls and in particular the characteristics of the rolling oil characterizing parameters, such as the surface roughness of the work roll or Viscosity of the rolling oil.

Die in ihrer Relativposition gegenüber der Ballenoberfläche 20 der Arbeitswalze 11 veränderbare Abstreiferkante 19 ermöglicht es, die Position der Abstreiferkante 19 sowohl hinsichtlich des Abstandes a von der Bandoberfläche 34 als auch hinsichtlich der Spaltbreite d den im jeweiligen Stadium des Walzvorgangs herrschenden Bedingungen anzupassen. Insbesondere kann die Spaltbreite d eines zwischen der Abstreiferkante 19 und der Ballenoberfläche 20 gebildeten Förderspaltes 38 einerseits ausreichend gering eingestellt werden, so dass eine von der Ballenoberfläche 20 schwerkraftbedingt ablaufende Ablaufmenge nicht oder lediglich mit einem geringen Anteil auf die Bandoberfläche 34 gelangt und andererseits ausreichend groß eingestellt werden, um zu ermöglichen, dass der durch den Walzspalt 10 auf die Bandeinlaufseite 17 gelangter Walzölfilm 45 durch den Förderspalt 38 hindurch bis in den Abwurfbereich 37 oberhalb einer Rückseite 39 des Abstreifers 18 gefördert wird und von dort durch den vorzugsweise rinnenförmig ausgebildeten Abstreifer 18 gezielt abgeleitet werden kann. Dabei hat sich herausgestellt, dass insbesondere eine von der Rotationsgeschwindigkeit der Arbeitswalzen 11, 12 abhängige Einstellung des Förderspalts 38 besonders vorteilhaft ist, um etwa den Förderspalt 38 während der beim Beschleunigen und Abbremsen der Arbeitswalzen 11, 12 sich ändernden Position des Abwurfbereichs 37 und einer sich infolge von Fliehkrafteinflüssen ändernden Schichtdicke des auf der Ballenoberfläche 20 haftenden Walzölfilms kontinuierlich anzupassen.The variable in their relative position relative to the bale surface 20 of the work roll 11 scraper edge 19 allows the position of the scraper edge 19 both in terms of the distance a from the belt surface 34 and with respect to the gap width d in the to adapt to the prevailing conditions of the rolling process. In particular, the gap width d of a conveying gap 38 formed between the wiper edge 19 and the bale surface 20 can on the one hand be set sufficiently low, so that a discharge quantity that runs off the bale surface 20 does not or only with a small proportion reaches the strip surface 34 and, on the other hand, set it to be sufficiently large be to allow that passed through the nip 10 on the tape inlet side 17 rolling oil film 45 is conveyed through the conveying gap 38 through to the discharge area 37 above a rear side 39 of the scraper 18 and derived from there by the preferably channel-shaped scraper 18 targeted can be. It has been found that in particular one of the rotational speed of the work rolls 11, 12 dependent adjustment of the conveying gap 38 is particularly advantageous to approximately the conveying gap 38 during the acceleration and deceleration of the work rolls 11, 12 changing position of the discharge area 37 and a as a result of changes in the centrifugal force, the layer thickness of the rolling oil film adhering to the ball surface 20 is continuously adjusted.

Während der Walzpausen, also bei fortgesetzter Walzenrotation und leerlaufendem Walzwerk kann die Abstreiferkante 19 vorteilhaft zur Anlage gegen die Ballenoberfläche 20 verfahren werden, um die Ballenoberfläche 20 zu reinigen.During the rolling breaks, ie with continued roll rotation and idling rolling mill, the wiper edge 19 can advantageously be moved to rest against the bale surface 20 in order to clean the bale surface 20.

Fig. 2 zeigt das in Fig. 1 dargestellte Walzwerk 13, wobei ergänzend zu dem oberhalb des Walzbands 16 auf der Bandauslaufseite 17 angeordneten Abstreifer 18 unterhalb des Walzbands 16 ein weiterer Abstreifer 40 vorgesehen ist, der in vergleichbarer Funktion wie der Abstreifer 18 mit einer Ballenoberfläche 41 der unteren Arbeitswalze 12 zusammenwirkt. Vorzugsweise ist der Abstreifer 40 an einem Schwenktisch 42 angeordnet, der insbesondere gleichzeitig zur Installation eines Luftkissenförderers 43 dient. Auch hier kann mittels einer Einstelleinrichtung der Abstreifer 40 in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter in seiner Relativanordnung zur Ballenoberfläche der unteren Arbeitswalze 12 verändert werden, sodass ein entsprechender Förderspalt eingestellt werden kann. Fig. 2 shows that in Fig. 1 shown rolling mill 13, wherein in addition to the arranged above the rolling belt 16 on the belt outlet side 17 scraper 18 below the rolling belt 16, a further scraper 40 is provided which cooperates with a bale surface 41 of the lower work roll 12 in a similar function as the scraper 18. Preferably, the scraper 40 is arranged on a pivoting table 42, which serves in particular at the same time for the installation of an air cushion conveyor 43. Again, by means of an adjustment of the Scrapers 40 are changed in response to a the rolling process or the rolling result influencing parameters in its relative arrangement to the ball surface of the lower work roll 12, so that a corresponding conveying gap can be adjusted.

Fig. 2 zeigt eine auf der Bandauslaufseite 17 in Bandlaufrichtung stromabwärts benachbart zu den Abstreifern 18, 40 angeordnete Sensoreinrichtung 44 die im vorliegenden Fall sowohl auf der Oberseite des Walzbandes 16 als auch auf der Unterseite des Walzbandes 16 die Messung der auf der jeweiligen Oberfläche vorhandenen Walzölmenge ermöglicht, um hieraus eine Stellgröße für eine auf die Einstelleinrichtung 21 der Abstreifer 18, 40 wirkenden Steuereinrichtung zu erzeugen. Fig. 2 shows a downstream on the strip outlet side 17 in the strip running direction adjacent to the scrapers 18, 40 arranged sensor device 44 which allows in the present case, both on the top of the rolled strip 16 and on the underside of the rolled strip 16, the measurement of the amount of rolling oil present on the respective surface From this, a manipulated variable for a control device acting on the adjusting device 21 of the scrapers 18, 40 is generated.

Claims (11)

Verfahren zur Reduzierung der Walzöllast eines durch einen Walzspalt (10) eines Walzwerks (13) geförderten Walzbandes (16), bei dem ein auf einer Bandauslaufseite (17) des Walzwerks (13) angeordneter, mit einer Abstreiferkante (19) zur Anlage gegen eine Ballenoberfläche (20) einer den Walzspalt (10) begrenzenden oberen Arbeitswalze (11) versehener Abstreifer (18) zur Ausbildung eines Förderspaltes (38) mit einer Spaltbreite d für an der Ballenoberfläche (20) haftendes Walzöl in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter in seiner Relativanordnung zur Ballenoberfläche (20) verändert wird.Method for reducing the rolling stock load of a rolled strip (16) conveyed through a roll gap (10) of a rolling mill (13), wherein a stripper edge (17) of the rolling mill (13) is arranged with a stripper edge (19) for bearing against a bale surface (20) a scraper (18) provided with an upper work roll (11) defining the nip (10) for forming a conveying nip (38) having a nip width d for rolling oil adhering to the bale surface (20) in response to a rolling or rolling result Parameter in its relative arrangement to the bale surface (20) is changed. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
dass die Spaltbreite d des Förderspaltes (38) während des Walzbetriebs derart eingestellt wird, dass ein an der Ballenoberfläche (20) im Bereich zwischen dem Walzspalt (10) und der Abstreifkante (19) haftender Walzölfilm durch den Förderspalt (38) hindurch bis in einen Abwurfbereich (37) der Ballenoberfläche (20) oberhalb einer Rückseite (39) des Abstreifers (18) gefördert wird.Method according to claim 1,
characterized,
that the gap width d of the conveying gap (38) is adjusted during the rolling operation such that a rolling oil film adhering to the ball surface (20) in the region between the roll gap (10) and the scraping edge (19) passes through the conveying gap (38) and into one Abwurfbereich (37) of the ball surface (20) above a rear side (39) of the scraper (18) is promoted. Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass die Spaltbreite d des Förderspaltes (38) während einer Unterbrechung des Walzbetriebs zur Anlage der Abstreiferkante (19) des Abstreifers (18) gegen die Ballenoberfläche (20) auf Null reduziert wird.Method according to claim 1 or 2,
characterized,
that the gap width d of the conveying gap (38) is reduced to zero during an interruption of the rolling operation for abutment of the wiper edge (19) of the wiper (18) against the bale surface (20). Verfahren nach einem der vorangehenden Ansprüche,
dadurch gekennzeichnet,
dass die Spaltbreite d des Förderspaltes (38) während der Beschleunigung und/oder dem Abbremsen der Arbeitswalzen (11, 12) verändert wird.Method according to one of the preceding claims,
characterized,
that the gap width d of the conveying gap (38) during the acceleration and / or deceleration of the work rolls (11, 12) is changed. Verfahren nach einem oder mehreren der vorangehenden Ansprüche,
dadurch gekennzeichnet,
dass die Spaltbreite d des Förderspaltes (38) in Abhängigkeit von der Viskosität des Walzöls verändert wird.Method according to one or more of the preceding claims,
characterized,
that the gap width d of the conveying gap (38) in function of the viscosity of the rolling oil is changed. Verfahren nach einem oder mehreren der vorangehenden Ansprüche,
dadurch gekennzeichnet,
dass die Spaltbreite d des Förderspaltes (38) in Abhängigkeit von der in Bandlaufrichtung stromabwärts gemessenen Walzölmenge verändert wird.Method according to one or more of the preceding claims,
characterized,
that the gap width d of the conveying gap (38) is changed as a function of the rolling oil quantity measured downstream in the strip running direction. Vorrichtung zur Reduzierung der Walzöllast einer durch einen Walzspalt (10) eines Walzwerks (13) geförderten Walzbandes (16), umfassend einen auf einer Bandauslaufseite (17) des Walzwerkes (13) angeordneten Abstreifer (18), der gegenüberliegend einer Ballenoberfläche (20) einer den Walzspalt (10) begrenzenden oberen Arbeitswalze (11) eine Abstreiferkante (19) zur Anlage gegen die Ballenoberfläche (20) aufweist,
dadurch gekennzeichnet,
dass der Abstreifer (18) zur Einstellung eines Förderspaltes (38) zwischen der Abstreiferkante (19) und der Ballenoberfläche (20) mit einer Einstelleinrichtung (21) versehen ist, die zur Beaufschlagung der Einstelleinrichtung (21) mit einer Stellgröße mit einer Steuereinrichtung verbunden ist, die die Stellgröße in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter vorgibt.Device for reducing the rolling stock load of a rolled strip (16) conveyed through a roll gap (10) of a rolling mill (13), comprising a stripper (18) arranged on a strip outlet side (17) of the rolling mill (13) and lying opposite a bale surface (20) the nip (10) limiting upper work roll (11) has a scraper edge (19) for abutment against the bale surface (20),
characterized,
in that the scraper (18) for setting a conveying gap (38) between the scraper edge (19) and the bale surface (20) is provided with an adjustment device (21) which is connected to a control variable for actuating the adjusting device (21) which specifies the manipulated variable as a function of a parameter influencing the rolling process or the rolling result. Vorrichtung nach Anspruch 7,
dadurch gekennzeichnet,
dass die Einstelleinrichtung (21) sowohl eine Anschlagstellung der Abstreiferkante (19) zur Anlage der Abstreiferkante (19) gegen die Ballenoberfläche (20) der Arbeitswalze (11) als auch eine Distanzstellung zur Einstellung einer maximalen Spaltbreite d des zwischen der Abstreiferkante (19) und der Ballenoberfläche (20) ausgebildeten Förderspaltes (38) ermöglicht.Device according to claim 7,
characterized,
in that the adjusting device (21) has both a stop position of the wiper edge (19) for resting the wiper edge (19) against the bale surface (20) of the work roll (11) and a distance position for setting a maximum gap width d between the wiper edge (19) and the bale surface (20) formed conveying gap (38) allows. Vorrichtung nach Anspruch 7 oder 8,
dadurch gekennzeichnet,
dass die Steuereinrichtung mit einer Sensorrichtung (44) zur Erfassung des Parameters versehen ist.Device according to claim 7 or 8,
characterized,
in that the control device is provided with a sensor direction (44) for detecting the parameter. Vorrichtung nach Anspruch 9,
dadurch gekennzeichnet,
dass die Sensoreinrichtung (44) zur Erfassung eines die Walzölmenge auf einer Bandoberfläche (34) des Walzbandes (16) charakterisierenden Parameters dient.Device according to claim 9,
characterized,
in that the sensor device (44) serves to detect a parameter characterizing the rolling oil quantity on a strip surface (34) of the rolled strip (16). Vorrichtung nach einem der Ansprüche 7 bis 10,
dadurch gekennzeichnet,
dass die Abstreiferkante (19) des Abstreifers (18) eine abrasive oder als Schneidkante ausgebildete Oberfläche aufweist.Device according to one of claims 7 to 10,
characterized,
in that the wiper edge (19) of the wiper (18) has an abrasive surface or a cutting edge.
EP17201816.0A 2017-01-30 2017-11-15 Method and device for reducing the rolling oil load of a rolled strip Active EP3354362B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017101713.5A DE102017101713A1 (en) 2017-01-30 2017-01-30 Method and device for reducing the rolling stock load of a rolled strip

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN114769337A (en) * 2022-05-20 2022-07-22 陈洋 Copper strips processing equipment

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Publication number Priority date Publication date Assignee Title
JPH0631316A (en) * 1992-07-21 1994-02-08 Kawasaki Steel Corp Hot rolling method by use of lubricant
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EP2697000A1 (en) * 2011-04-12 2014-02-19 Siemens Plc Roll stripper device and method
EP2768622A1 (en) 2011-10-18 2014-08-27 SMS Siemag AG Stripper for an operating roll of a rolling stand
DE102014222530A1 (en) * 2014-05-05 2015-11-05 Sms Group Gmbh Band deflector and roller assembly
WO2017118563A1 (en) * 2016-01-07 2017-07-13 Sms Group Gmbh Device for conducting away a fluid from an object

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0631316A (en) * 1992-07-21 1994-02-08 Kawasaki Steel Corp Hot rolling method by use of lubricant
EP0662359A1 (en) 1994-01-08 1995-07-12 Sms Schloemann-Siemag Aktiengesellschaft Device for sealing without contact a gap on the outlet of a rolling stand
EP2697000A1 (en) * 2011-04-12 2014-02-19 Siemens Plc Roll stripper device and method
EP2768622A1 (en) 2011-10-18 2014-08-27 SMS Siemag AG Stripper for an operating roll of a rolling stand
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114769337A (en) * 2022-05-20 2022-07-22 陈洋 Copper strips processing equipment

Also Published As

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CN208146650U (en) 2018-11-27
DE102017101713A1 (en) 2018-08-02

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