EP3354362B1 - 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
EP3354362B1
EP3354362B1 EP17201816.0A EP17201816A EP3354362B1 EP 3354362 B1 EP3354362 B1 EP 3354362B1 EP 17201816 A EP17201816 A EP 17201816A EP 3354362 B1 EP3354362 B1 EP 3354362B1
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EP
European Patent Office
Prior art keywords
gap
roller
wiper
rolling oil
roll
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EP17201816.0A
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German (de)
French (fr)
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EP3354362A1 (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 oil load of a rolled strip conveyed through a roll gap of a rolling mill, in which a stripper which is arranged on a strip outlet side of the rolling mill and is provided with a scraper edge for abutment against a bale surface of an upper work roll delimiting the roll gap is used.
  • the present invention relates to a rolling mill with a device for reducing the rolling oil load of a rolling strip conveyed through a roll gap of a rolling mill, comprising an upper work roll arranged in a rolling mill and a stripper arranged on a strip outlet side of the rolling mill, which is opposite a bale surface of the roll gap delimiting the roll gap upper work roll has a scraper edge to bear against the bale surface.
  • scrapers are used in particular in cooperation with the upper work roll, but also in cooperation with the lower work roll.
  • the wipers are typically in rolling operation constant contact with the work roll, a wiper edge of the wipers abutting against a bale surface of the work roll.
  • the wipers are used, in particular, to wipe rolling material adhering to the work rolls from the work rolls and to prevent rolling oil applied to the bale surface of the work roll by means of a rolling oil application arranged above the wipers.
  • a scraper of the type mentioned is from EP 2 768 622 A1 known.
  • a partitioning element which is arranged in a relative position corresponding to the position of a scraper relative to the bale surface of the upper work roll, a gap being formed between a front edge of the partitioning element and the bale surface, which gap forms a flow channel running parallel to the bale surface, into which Compressed air flows from a nozzle of the partitioning element arranged on the front edge and flows along the surface of the bale in the direction of rotation of the work roll and is intended to prevent rolling oil running off the bale surface of the work roll from reaching the surface of the rolled strip.
  • the partitioning element which is complex in comparison to a scraper, in particular because of the compressed air supply, 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 in the process.
  • the present invention is based on the object of proposing a method and a device for reducing the rolling oil load of a rolled strip, in such a way that a stripper which is simpler in design than a partitioning element can be used with improved efficiency.
  • the method according to the invention has the features of claim 1.
  • the arrangement of the stripper with a gap width d for rolling oil adhering to the bale surface is changed as a function of a parameter influencing the rolling process or the rolling result in its arrangement relative to the bale surface.
  • the invention is based on the knowledge that, in particular on the strip outlet side, rolling oil can in fact not only reach the surface of the rolled strip from an area of the bale surface arranged above the scraper, to which the rolling oil is applied, but also a substantial proportion of the rolling load on the roller Rolling strip on the strip exit side is caused by the fact that from the strip entry side into the roll gap with the rolling oil drawn in, an additional rolling oil load results.
  • This rolling oil which is transported through the roll gap and adheres to the surface of the bale, is detached from the surface of the bale by a scraper which lies against the surface of the bale and reaches the surface of the rolled strip.
  • the gap width d of the conveying gap depends on at least one of the Rolling process or the parameters influencing the rolling result is changed in its arrangement relative to the bale surface. A reduction in the work roll diameter due to wear on the bale surface can also be taken into account.
  • the gap width of the conveying gap is set during the rolling operation in such a way that a rolling oil film adhering to the bale surface in the area between the rolling gap and the scraper edge is conveyed through the conveying gap to a discharge area of the bale surface above a rear side of the scraper.
  • the gap width of the conveying gap is preferably reduced to zero during an interruption of the rolling operation in order to rest the scraper edge against the bale surface, so that the scraper can be used in a conventional manner to remove residues deposited on the bale surface.
  • the gap width of the conveying gap is preferably changed during the acceleration and / or braking of the work rolls in order to continuously optimize the gap width during the acceleration or braking.
  • the change is particularly preferably carried out continuously.
  • the rolling oil 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 bale surface and / or the viscosity of the rolling oil.
  • the rolling mill according to the invention has the features of claim 7.
  • the scraper for setting a conveying gap between the scraper edge of the scraper and the bale surface is provided with an adjusting device which is connected to a control variable of the rolling mill to act upon the adjusting device which controls the correcting variable as a function of a rolling process or the rolling result Specifies parameters.
  • the setting device preferably enables both a stop position of the scraper edge of the scraper for abutment of the scraper edge against the bale surface of the work roll and a distance position for setting a maximum gap width of the conveying gap formed between the scraper edge and the bale surface.
  • control device is provided with a sensor device for detecting the parameter, the device can be operated automatically.
  • the sensor device is preferably used to detect a parameter that characterizes the quantity of rolling oil on the surface of the rolled strip.
  • the scraper function can be carried out particularly effectively when the front edge of the scraper lies against the surface of the bale.
  • Fig. 1 shows a schematic representation of two work rolls 11, 12 of a rolling mill 13 which delimit a roll gap 10 and which are arranged between two support rolls 14, 15.
  • a roller belt 16 is conveyed through the roll gap 10, a stripper 18 being provided on a belt outlet side 17 in the case of the exemplary embodiment shown only above the roller belt, said stripper 18 being arranged opposite a ball surface 20 of the upper work roller 11 with a stripper edge 19 which is preferably exchangeably arranged on the stripper 18 is.
  • the scraper 18 is provided with an adjusting device 21, which in the present case comprises a linear adjustment 23 arranged on a roller frame 22, which enables the longitudinal adjustment of a splash guard plate 24, at the lower end of which the scraper 18 by Swivel joint 25 is arranged pivotably.
  • the adjusting device 21 of the scraper 18 comprises a swivel device 26 which is formed from a linear adjustment 28 arranged on an underside 27 of the splash guard 24, which acts on a swivel lever 29 connected to the scraper 18.
  • the adjusting device 21 enables the scraper 18 to be adjusted relative to the upper work roll 11 such that both the distance a between the scraper edge 19 and the roller belt 16 and the gap width d of a conveying gap 38 formed between the scraper edge 19 and the bale surface 20 of the upper work roll 11 is changeable.
  • FIG. 1 an impingement of the bale surface 20 of the work roll 11 with rolling oil is indicated, which on the bale surface 20 passes from a strip inlet side 33 of the rolling mill 13 through a wedge gap 35 formed in the roll gap 10 between the bale surface 20 and a strip surface 34 of the rolled strip 16 to the strip outlet side 17 and initially adheres to the bale surface 20 until the rolling oil film 45 is finally at least partially thrown off the bale surface 20 into a discharge region 37 of the bale surface 20 due to the centrifugal forces acting on the rolling oil film 45.
  • the position of the discharge region 37 on the bale surface 20 varies as a function of the process parameters of the rolling process and also as a function of surface parameters of the rolls and in particular the parameters characterizing the properties of the rolling oil, such as the surface roughness of the work roll or the Viscosity of the rolling oil.
  • the in its relative position relative to the bale surface 20 of the work roll 11 changeable scraper edge 19 makes it possible to change the position of the scraper edge 19 both in terms of the distance a from the belt surface 34 and in terms of the gap width d to adapt to the prevailing conditions at the respective stage of the rolling process.
  • the gap width d of a conveying gap 38 formed between the scraper edge 19 and the bale surface 20 can on the one hand be set sufficiently small so that a run-off quantity flowing from the bale surface 20 does not reach the belt surface 34 or only to a small extent and on the other hand is set sufficiently large in order to make it possible for the rolling oil film 45, which has reached the strip inlet side 17 through the roll gap 10, to be conveyed through the conveying gap 38 to the discharge area 37 above a rear side 39 of the scraper 18 and from there to be discharged in a targeted manner by the preferably channel-shaped scraper 18 can be.
  • an adjustment of the conveying gap 38 which is dependent on the rotational speed of the work rolls 11, 12 is particularly advantageous, for example around the conveying gap 38 during the position of the discharge area 37 which changes during acceleration and braking of the work rolls 11, 12 and one due to centrifugal forces changing layer thickness of the rolling oil film adhering to the bale surface 20 continuously adjust.
  • the scraper edge 19 can advantageously be moved against the bale surface 20 in order to clean the bale surface 20.
  • Fig. 2 shows that in Fig. 1 Rolling mill 13 shown, in addition to the scraper 18 arranged above the rolled strip 16 on the strip outlet side 17 below the rolled strip 16, a further scraper 40 is provided which cooperates with a bale surface 41 of the lower work roll 12 in a function comparable to that of the scraper 18.
  • the scraper 40 is preferably arranged on a swivel table 42, which is used in particular for the installation of an air cushion conveyor 43.
  • wipers 40 can be changed in their arrangement relative to the bale surface of the lower work roll 12, so that a corresponding conveying gap can be set.
  • Fig. 2 shows a sensor device 44 arranged on the strip outlet side 17 in the strip running direction downstream of the wipers 18, 40, which in the present case enables the measurement of the amount of rolling oil present on the respective surface both on the top of the rolled strip 16 and on the underside of the rolled strip 16 from this to generate a manipulated variable for a control device acting on the setting device 21 of the wipers 18, 40.

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

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 ein Walzwerk mit einer Vorrichtung zur Reduzierung der Walzöllast einer durch einen Walzspalt eines Walzwerks geförderten Walzbandes, umfassend eine in einem Walzwerk angeordnete obere Arbeitswalze und einen auf einer Bandauslaufseite des Walzwerks angeordneten Abstreifer, der gegenüberliegend einer Ballenoberfläche der den Walzspalt begrenzenden oberen Arbeitswalze eine Abstreiferkante zur Anlage gegen die Ballenoberfläche aufweist.The present invention relates to a method for reducing the rolling oil load of a rolled strip conveyed through a roll gap of a rolling mill, in which a stripper which is arranged on a strip outlet side of the rolling mill and is provided with a scraper edge for abutment against a bale surface of an upper work roll delimiting the roll gap is used. Furthermore, the present invention relates to a rolling mill with a device for reducing the rolling oil load of a rolling strip conveyed through a roll gap of a rolling mill, comprising an upper work roll arranged in a rolling mill and a stripper arranged on a strip outlet side of the rolling mill, which is opposite a bale surface of the roll gap delimiting the roll gap upper work roll has a scraper edge to bear 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 work roll, but also in cooperation with the lower work roll. The wipers are typically in rolling operation constant contact with the work roll, a wiper edge of the wipers abutting against a bale surface of the work roll. The wipers are used, in particular, to wipe rolling material adhering to the work rolls from the work rolls and to prevent rolling oil applied to the bale surface of the work roll by means of a rolling oil application arranged above the wipers. A scraper of the type mentioned is from 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 the use of a partitioning element is known, which is arranged in a relative position corresponding to the position of a scraper relative to the bale surface of the upper work roll, a gap being formed between a front edge of the partitioning element and the bale surface, which gap forms a flow channel running parallel to the bale surface, into which Compressed air flows from a nozzle of the partitioning element arranged on the front edge and flows along the surface of the bale in the direction of rotation of the work roll and is intended to prevent rolling oil running off the bale surface of the work roll from reaching 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.The partitioning element, which is complex in comparison to a scraper, in particular because of the compressed air supply, 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 in the process.

Aus der DE 10 2014 222 530 A1 ist eine mit einem Bandabweiser versehene, in einem Walzgerüst angeordnete Walzenanordnung bekannt, wobei zwischen dem Bandabweiser und einer Walze der Walzenanordnung ein in der Spaltbreite einstellbarer Spalt vorgesehen ist.From the DE 10 2014 222 530 A1 is known a roll arrangement provided with a band deflector and arranged in a roll stand, a gap with an adjustable gap being provided between the band deflector and a roll of the roll arrangement.

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 present invention is based on the object of proposing a method and a device for reducing the rolling oil load of a rolled strip, in such a way that a stripper which is simpler in design than a partitioning element can be used with improved efficiency.

Zur Lösung dieser Aufgabe weist das erfindungsgemäße Verfahren die Merkmale des Anspruchs 1 auf.To achieve this object, the method according to the invention 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 arrangement of the stripper with a gap width d for rolling oil adhering to the bale surface is changed as a function of a parameter influencing the rolling process or the rolling result in its arrangement relative 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 knowledge that, in particular on the strip outlet side, rolling oil can in fact not only reach the surface of the rolled strip from an area of the bale surface arranged above the scraper, to which the rolling oil is applied, but also a substantial proportion of the rolling load on the roller Rolling strip on the strip exit side is caused by the fact that from the strip entry side into the roll gap with the rolling oil drawn in, an additional rolling oil load results. This rolling oil, which is transported through the roll gap and adheres to the surface of the bale, is detached from the surface of the bale by a scraper which lies against the surface of the bale 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.It has now been found in tests that when a conveyor gap is set between the scraper edge of the scraper and the bale surface, a rolling oil film adhering to the bale surface is conveyed through the conveying gap past the scraper edge, to the rear of the scraper facing away from the surface of the roller belt and finally is thrown off the bale surface due to the centrifugal force. The conveying direction of the rolling oil film that has reached the strip outlet side through the roll gap and adheres to the bale surface is opposite to the outflow direction of a quantity of rolling oil that flows from the bale surface due to gravity, so that the conveyed upward through the conveying gap Rolling oil film counteracts the downward rolling oil drain and creates 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.With a suitable adjustment of the conveying gap formed between the scraper edge of the scraper and the bale surface, it can now be achieved that on the one hand the natural blocking effect of the rolling oil film conveyed upwards can be used and on the other hand an action on the surface of the rolled strip by the rolling oil film detached from the bale surface due to the centrifugal force is prevented. Since the formation of the rolling oil film is dependent on a wide variety of parameters, such as in particular the 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 roll bales, it is provided according to the invention that the gap width d of the conveying gap depends on at least one of the Rolling process or the parameters influencing the rolling result is changed in its arrangement relative to the bale surface. A reduction in the work roll diameter due to wear on the bale surface can also be taken into account.

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 is set during the rolling operation in such a way that a rolling oil film adhering to the bale surface in the area between the rolling gap and the scraper edge is conveyed through the conveying gap to a discharge area of the bale surface above a rear side of the scraper.

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.The gap width of the conveying gap is preferably reduced to zero during an interruption of the rolling operation in order to rest the scraper edge against the bale surface, so that the scraper 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.The gap width of the conveying gap is preferably changed during the acceleration and / or braking of the work rolls in order to continuously optimize the gap width during the acceleration or braking. The change is particularly preferably carried out continuously.

Wenn die Spaltbreite des Förderspaltes in Abhängigkeit von der in Bandlaufrichtung stromabwärts gemessenen Walzölmenge verändert wird, kann die Walzöllast als Regelgröße verwendet werden. Vorzugsweise wird die Spaltbreite des Förderspaltes in Abhängigkeit von der Walzgeschwindigkeit und/oder der Rauheit der Ballenoberfläche und/oder der Viskosität des Walzöls verändert.If the gap width of the conveyor gap is changed depending on the quantity of rolling oil measured downstream in the direction of strip travel, the rolling oil 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 bale surface and / or the viscosity of the rolling oil.

Das erfindungsgemässe Walzwerk weist die Merkmale des Anspruchs 7 auf.The rolling mill 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 des Walzwerks verbunden ist, welche die Stellgröße in Abhängigkeit von einem den Walzvorgang oder das Walzergebnis beeinflussenden Parameter vorgibt.According to the invention, the scraper for setting a conveying gap between the scraper edge of the scraper and the bale surface is provided with an adjusting device which is connected to a control variable of the rolling mill to act upon the adjusting device which controls the correcting variable as a function of a rolling process or the rolling result Specifies parameters.

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.The setting device preferably enables both a stop position of the scraper edge of the scraper for abutment of the scraper edge against the bale surface of the work roll and a distance position for setting a maximum gap width of the conveying gap formed between the scraper edge and the bale surface.

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, the device can be operated automatically.

Vorzugsweise dient die Sensoreinrichtung zur Erfassung eines die Walzölmenge auf der Oberfläche des Walzbandes charakterisierenden Parameters.The sensor device is preferably used to detect a parameter that characterizes the quantity 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 surface or a cutting edge, the scraper function can be carried out particularly effectively when the front edge of the scraper lies against the surface of the bale.

Nachfolgend wird eine bevorzugte Ausführungsform der Erfindung anhand der Zeichnung näher erläutert.A preferred embodiment of the invention is explained in more detail below 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 a scraper arranged above the rolled strip;
Fig. 2
an embodiment with a stripper arranged above the rolling belt and a stripper arranged below the rolling belt

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 two work rolls 11, 12 of a rolling mill 13 which delimit a roll gap 10 and which are arranged between two support rolls 14, 15. A roller belt 16 is conveyed through the roll gap 10, a stripper 18 being provided on a belt outlet side 17 in the case of the exemplary embodiment shown only above the roller belt, said stripper 18 being arranged opposite a ball surface 20 of the upper work roller 11 with a stripper edge 19 which is preferably exchangeably arranged on the stripper 18 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 linear adjustment 23 arranged on a roller frame 22, which enables the longitudinal adjustment of a splash guard plate 24, at the lower end of which the scraper 18 by Swivel joint 25 is arranged pivotably. For swivel adjustment of the scraper 18 relative to the splash guard 24, the adjusting device 21 of the scraper 18 comprises a swivel device 26 which is formed from a linear adjustment 28 arranged on an underside 27 of the splash guard 24, which acts on a swivel lever 29 connected to the scraper 18. The adjusting device 21 enables the scraper 18 to be adjusted relative to the upper work roll 11 such that both the distance a between the scraper edge 19 and the roller belt 16 and the gap width d of a conveying gap 38 formed between the scraper edge 19 and the bale surface 20 of the upper work roll 11 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 arrows 30 and 31 is in Fig. 1 an impingement of the bale surface 20 of the work roll 11 with rolling oil is indicated, which on the bale surface 20 passes from a strip inlet side 33 of the rolling mill 13 through a wedge gap 35 formed in the roll gap 10 between the bale surface 20 and a strip surface 34 of the rolled strip 16 to the strip outlet side 17 and initially adheres to the bale surface 20 until the rolling oil film 45 is finally at least partially thrown off the bale surface 20 into a discharge region 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 tests, the position of the discharge region 37 on the bale surface 20 varies as a function of the process parameters of the rolling process and also as a function of surface parameters of the rolls and in particular the parameters characterizing the properties of the rolling oil, such as the surface roughness of the work roll or the 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 in its relative position relative to the bale surface 20 of the work roll 11 changeable scraper edge 19 makes it possible to change the position of the scraper edge 19 both in terms of the distance a from the belt surface 34 and in terms of the gap width d to adapt to the prevailing conditions at the respective stage of the rolling process. In particular, the gap width d of a conveying gap 38 formed between the scraper edge 19 and the bale surface 20 can on the one hand be set sufficiently small so that a run-off quantity flowing from the bale surface 20 does not reach the belt surface 34 or only to a small extent and on the other hand is set sufficiently large in order to make it possible for the rolling oil film 45, which has reached the strip inlet side 17 through the roll gap 10, to be conveyed through the conveying gap 38 to the discharge area 37 above a rear side 39 of the scraper 18 and from there to be discharged in a targeted manner by the preferably channel-shaped scraper 18 can be. It has been found that, in particular, an adjustment of the conveying gap 38 which is dependent on the rotational speed of the work rolls 11, 12 is particularly advantageous, for example around the conveying gap 38 during the position of the discharge area 37 which changes during acceleration and braking of the work rolls 11, 12 and one due to centrifugal forces changing layer thickness of the rolling oil film adhering to the bale surface 20 continuously adjust.

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 breaks between rolls, that is, with continued roll rotation and idling rolling mill, the scraper edge 19 can advantageously be moved 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 Rolling mill 13 shown, in addition to the scraper 18 arranged above the rolled strip 16 on the strip outlet side 17 below the rolled strip 16, a further scraper 40 is provided which cooperates with a bale surface 41 of the lower work roll 12 in a function comparable to that of the scraper 18. The scraper 40 is preferably arranged on a swivel table 42, which is used in particular for the installation of an air cushion conveyor 43. Here, too, the Depending on a parameter influencing the rolling process or the rolling result, wipers 40 can be changed in their arrangement relative to the bale surface of the lower work roll 12, so that a corresponding conveying gap can be set.

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 sensor device 44 arranged on the strip outlet side 17 in the strip running direction downstream of the wipers 18, 40, which in the present case enables the measurement of the amount of rolling oil present on the respective surface both on the top of the rolled strip 16 and on the underside of the rolled strip 16 from this to generate a manipulated variable for a control device acting on the setting device 21 of the wipers 18, 40.

Claims (11)

  1. A method for reducing the rolling oil load of a roller strip (16) conveyed through a roll gap (10) of a roller mill (13), a wiper (18) being used in this method which is arranged on a strip exit side (17) of the roller mill (13) and is provided with a wiper edge (19) for being contacted to a roller surface (20) of an upper work roll (11) delimiting the roll gap (10),
    characterized in that
    the wiper (18) is altered in its relative arrangement to the roller surface (20) in dependence of a parameter influencing the rolling process or the rolled result for forming a conveyor gap (38), which has a gap width d, for rolling oil adhering to the roller surface (20) .
  2. The method according to claim 1,
    characterized in that
    the gap width d of the conveyor gap (38) is set in such a manner during roller operation that a rolling oil film adhering to the roller surface (20) in the area between the roll gap (10) and the wiper edge (19) is conveyed through the conveyor gap (38) into a discharge area (37) of the roller surface (20) above a back side (39) of the wiper (18).
  3. The method according to claim 1 or 2,
    characterized in that
    the gap width d of the conveyor gap (38) is reduced to zero during an interruption of the roller operation so as to contact the wiper edge (19) of the wiper (18) to the roller surface (20).
  4. The method according to one of the preceding claims,
    characterized in that
    the gap width d of the conveyor gap (38) is altered while the work rolls (11, 12) are accelerated and/or decelerated.
  5. The method according to one or more of the preceding claims,
    characterized in that
    the gap width d of the conveyor gap (38) is altered in dependence of the viscosity of the rolling oil.
  6. The method according to one or more of the preceding claims,
    characterized in that
    the gap width d of the conveyor gap (38) is altered in dependence of the amount of rolling oil measured downstream of the conveying direction.
  7. A roller mill having a device for reducing the rolling oil load of a roller strip (16) conveyed through a roll gap (10) of the roller mill (13), the roller mill (13) comprising an upper work roll (11) arranged in the roller mill (13) and a wiper (18) which is arranged on a strip exit side (17) of the roller mill (13) and comprises a wiper edge (19) for being contacted to the roller surface (20), said wiper edge (19) being arranged opposite a roller surface (20) of the upper work roll (11) delimiting the roll gap (10),
    characterized in that
    the wiper (18) is provided with a setting device (21) for setting a conveyor gap (38) between the wiper edge (19) and the roller surface (20), said setting device (21) being connected to a control device of the roller mill (13) in order to apply an actuating variable to the setting device (21), said actuating variable being defined by the control device in dependence of a parameter influencing the rolling process or the rolled result.
  8. The roller mill having a device according to claim 7,
    characterized in that
    the setting device (21) enables a contact position of the wiper edge (19) for contacting the wiper edge (19) to the roller surface (20) of the work roll (11) as well as a distanced position for setting a maximum gap width d of the conveyor gap (38) formed between the wiper edge (19) and the roller surface (20).
  9. The roller mill having a device according to claim 7 or 8,
    characterized in that
    the control device is provided with a sensor device (44) for identifying the parameter.
  10. The roller mill having a device according to claim 9,
    characterized in that
    the sensor device (44) serves for identifying a parameter characterizing the amount of rolling oil on a strip surface (34) of the roll strip (16).
  11. The roller mill having a device according to any one of the claims 7 to 10,
    characterized in that
    the wiper edge (19) of the wiper (18) comprises an abrasive surface or a surface formed as 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

Publications (2)

Publication Number Publication Date
EP3354362A1 EP3354362A1 (en) 2018-08-01
EP3354362B1 true EP3354362B1 (en) 2020-04-01

Family

ID=60327200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17201816.0A Active EP3354362B1 (en) 2017-01-30 2017-11-15 Method and device for reducing the rolling oil load of a rolled strip

Country Status (3)

Country Link
EP (1) EP3354362B1 (en)
CN (1) CN208146650U (en)
DE (1) DE102017101713A1 (en)

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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

Family Cites Families (6)

* 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
DE4422422A1 (en) 1994-01-08 1995-07-13 Schloemann Siemag Ag Appts. for contactless sealing of gap at the exit of a rolling stand,
EP2697000B1 (en) * 2011-04-12 2016-02-24 Primetals Technologies, Limited Roll stripper device and method
DE102011084735A1 (en) 2011-10-18 2013-04-18 Sms Siemag Ag Scraper for a work roll of a rolling stand
DE102014222530A1 (en) * 2014-05-05 2015-11-05 Sms Group Gmbh Band deflector and roller assembly
DE102016204501B4 (en) * 2016-01-07 2023-08-10 Sms Group Gmbh Device for draining a fluid from an object

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* Cited by examiner, † Cited by third party
Title
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CN208146650U (en) 2018-11-27
EP3354362A1 (en) 2018-08-01

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