EP0879101B1 - Workpiece descaling process - Google Patents

Workpiece descaling process Download PDF

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Publication number
EP0879101B1
EP0879101B1 EP97901471A EP97901471A EP0879101B1 EP 0879101 B1 EP0879101 B1 EP 0879101B1 EP 97901471 A EP97901471 A EP 97901471A EP 97901471 A EP97901471 A EP 97901471A EP 0879101 B1 EP0879101 B1 EP 0879101B1
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EP
European Patent Office
Prior art keywords
liquid
rotor
control
jet
workpiece
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP97901471A
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German (de)
French (fr)
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EP0879101A1 (en
Inventor
Gerlinde Djumlija
Karl Kremmaier
Johann Oberhumer
Andreas Schweighofer
Herwig Wrulich
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Primetals Technologies Austria GmbH
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Voest Alpine Industrienlagenbau GmbH
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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
    • B21B45/04—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 de-scaling, e.g. by brushing
    • B21B45/08—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 de-scaling, e.g. by brushing hydraulically

Definitions

  • the invention relates to a method for descaling a workpiece, in particular one Rolled stock, the workpiece being moved past a rotor descaling device and in this at least one jet of liquid which flows around a surface to be descaled of the workpiece intersecting axis of rotation rotates on the surface to be descaled is sprayed, the liquid jet being intermittent, i.e. temporarily suspended, educated is, as well as a rotor descaling device for performing the method.
  • Rotor descaling devices are for example from DE-A - 43 28 303 or EP-A - 0 586 823 or DE-A 31 25 146 are known.
  • Rotor descaling devices are on rotating beams or rotating nozzle holders Spray nozzles are arranged, which are directed against the workpiece surface to be descaled.
  • the axis of rotation is generally perpendicular to the workpiece surface to be descaled aligned.
  • Rotor descaling devices of the type described above are from the US-A 5 220 935 and DE-A 23 55 893 are already known. A decrease in Liquid demand is achieved here by the liquid jet being intermittent is trained. Furthermore, a double application of workpiece surfaces with Liquid jets and thus unnecessary supercooling of the rolling stock, especially in the With regard to a subsequent rolling process, avoided. This embodiment however, does not yet enable optimal descaling of a workpiece with minimal Fluid requirement.
  • the invention aims to avoid the disadvantages and difficulties described above and sets itself the task of a method and a facility for carrying out the To create process in which by the intermittent formation of the liquid jet caused effect of increased jet pressures intensified and over the surface of the Workpiece is distributed. Furthermore, an optimal descaling with minimization of the Fluid requirements are made possible. In particular, it should be possible, not just that Lower fluid requirements, but also reduce fluid pressure without Losing in terms of the quality of the surfaces to be descaled.
  • This object is achieved in that the suspension of the formation of a Liquid jet two or more times in succession, but only for a short time, i.e. maximum via a liquid jet rotation of 10 °, preferably 5 °.
  • liquid jets are expediently formed at the same time.
  • a rotor descaling device for performing the method according to the invention with a liquid feed line to a stator and one opposite the stator rotatably mounted rotor with at least one nozzle to form a liquid jet is provided, is characterized in that between the rotor and the stator Interruption device with which the liquid supply to a nozzle is intermittent is feasible is provided.
  • the interruption device is expediently immovable relative to the stator arranged control disc formed with at least one control opening for the purpose of time limited passage of liquid to the nozzle is provided.
  • a structurally simple solution is characterized in that a plurality of Passage openings are provided and each passage opening to a respective nozzle of the rotor leads, with at least two mouths of the passage openings each in different Radial distances from the axis of rotation of the rotor open into the liquid chamber and the Control disk each corresponding to an opening of a passage opening with a allow a liquid passage from the liquid chamber to the passage opening Control opening is provided.
  • control openings are expedient at one and the same radial distance from the axis of rotation of the rotor is provided, which advantageously in one and the same Radial distance from the axis of rotation of the rotor arranged control openings are grouped together.
  • Control opening As a preferred embodiment Control slot extending in the circumferential direction of the control disk.
  • the nozzles are designed as omnidirectional nozzles. In this way, higher jet pressures can be achieved in comparison to flat jet nozzles, since the jet is only minimally expanded with omnidirectional nozzles.
  • FIG. 1 schematically illustrating a section through a rotor descaling device, the section being taken through the axis of rotation.
  • FIG. 2 shows a view of the rotor descaling device in the direction of FIG Arrow II.
  • 3 shows a partial top view of the rotor head according to line III-III of FIG. 1 and
  • FIG. 4 shows a top view of a control disk according to arrow IV of FIG. 1.
  • FIG. 5 illustrates a spray pattern on a rolling stock which is shown in FIG Top view is shown.
  • 6 illustrates the use of rotor descaling devices according to the invention for particularly wide workpieces, such as continuous cast slabs etc.
  • a rotor descaling device 1 In the case of a rotor descaling device 1, one by one is in a transmission housing 2 Rotation axis 3 rotatably supported rotor 4 with its rotor shaft 5 supported by bearings 6. On the rotor shaft 5 is a drive pinion 7, which is not shown with a Rotor drive combs, fastened. At the end protruding out of the gear housing 2 Rotor shaft 5, a rotor head 8 is provided which extends radially outwards Consoles 9 is provided which carry spray nozzles 10. According to the illustrated Exemplary embodiments are twelve consoles 9, which extend circumferentially around the rotor head 8 are evenly distributed, provided, each of which a console 9 with a Spray nozzle 10 is provided. The spray nozzles 10 are designed as omnidirectional nozzles and are on one each radially from the spray nozzle 10 through the bracket 9 and the rotor head 8 inwardly extending passage opening 11 connected by line.
  • the rotor shaft 5 is hollow and is inside a hollow tube 12, the so-called stator.
  • This stator 12 protrudes with one end 13 from the Gear housing 2 and is with this end 13 to a pressure medium supply line 14, such as a High pressure water pipe, connected.
  • a pressure medium supply line 14 such as a High pressure water pipe
  • Both the control disk 17 and the stator 12 are forming one Liquid chamber 19 (high-pressure liquid chamber) by means of a tight on the rotor 8 attached cover 20 covers.
  • control openings 18, 18 ', 18 "of the control disk are provided at different radial distances r 1 , r 2 and r 3 from the axis of rotation 3 of the rotor shaft 5, the radial distances r 1 to r 3 being so are selected so that the control openings 18 to 18 "can be brought into alignment with the orifices 21, 21 ', 21" of the through openings 11 provided on the inside of the rotor, which can be seen from FIG. 3, ie the through openings 11 are also up to different radial distances r 1 to r 3 extend inward from the axis of rotation 3 of the rotor shaft 5.
  • control openings 18, 18 ', 18 " are designed as slots, so that the Align the orifices 21 to 21 “of the through openings 11 on the inside of the rotary head the control slots 18, 18 ', 18 "over a longer range of rotation.
  • the function of the rotor descaling device 1 is as follows:
  • the liquid jet is formed as long as the control opening 18, 18 ', 18 "with the corresponding passage opening 11 is connected by line. If there is one Disconnection of this connection, the liquid jet is interrupted and it becomes again formed when the next control opening 18, 18 ', 18 "- or the same Control opening after rotation through 360 ° - again with the passage opening 11 is connected by line. There is therefore a temporary suspension Liquid jet.
  • the control disk 17 immovably attached to the stator 12 thus forms one Interruption device with which the liquid supply to each nozzle 10 in Intervals are interruptible.
  • Circular lines 25 illustrate the impingement of the intermittently formed liquid jets on the Workpiece surface 23, while this is shown by the arrow 26 Feed direction is moved past the rotor descaling device 1.
  • Sections a 2 adjoining the center line 27 of the workpiece 22 are acted upon by nozzles 10, which are supplied by control openings 18 ′ arranged at an average distance r 2 from the axis of rotation 3, and the three central sections a 1 are provided by the three closely arranged control Slots 18 ", which are arranged at the smallest distance r 1 from the axis of rotation 3 of the rotor 4, are formed.
  • Fig. 6 illustrates the arrangement of several large rotor descaling devices 1 Workpiece surfaces 23, such as occur with slabs or wide belts.
  • nozzles 10 are provided at different radial distances from the axis of rotation 3 of the rotor 4 and the control openings 18, 18 ', 18 "can be arranged such that several Nozzles 10 simultaneously or the nozzles 10 one after the other intermittently with liquid be charged.
  • Groups of nozzles can also have different nozzle diameters or they can also be formed by different types of nozzles. This allows the Constant exposure to water across the cross-section of the workpiece to be ignited being held.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Entzundern eines Werkstückes, insbesondere eines Walzgutes, wobei das Werkstück an einer Rotor-Entzunderungseinrichtung vorbeibewegt.wird und bei dieser mindestens ein Flüssigkeitsstrahl, der um eine die zu entzundernde Oberfläche des Werkstückes schneidende Rotationsachse rotiert, auf die zu entzundernde Oberfläche gespritzt wird, wobei der Flüssigkeitsstrahl intermittierend, d.h. zeitweilig aussetzend, gebildet wird, sowie eine Rotor-Entzunderungseinrichtung zur Durchführung des Verfahrens.The invention relates to a method for descaling a workpiece, in particular one Rolled stock, the workpiece being moved past a rotor descaling device and in this at least one jet of liquid which flows around a surface to be descaled of the workpiece intersecting axis of rotation rotates on the surface to be descaled is sprayed, the liquid jet being intermittent, i.e. temporarily suspended, educated is, as well as a rotor descaling device for performing the method.

Rotor-Entzunderungseinrichtungen sind beispielsweise aus der DE-A - 43 28 303 oder der EP-A - 0 586 823 oder der DE-A 31 25 146 bekannt. Bei diesen bekannten Rotor-Entzunderungseinrichtungen sind an rotierenden Balken bzw. rotierenden Düsenhaltern Spritzdüsen angeordnet, die gegen die zu entzundernde Werkstückoberfläche gerichtet sind. Die Rotationsachse ist in der Regel senkrecht zur zu entzundernden Werkstückoberfläche ausgerichtet.Rotor descaling devices are for example from DE-A - 43 28 303 or EP-A - 0 586 823 or DE-A 31 25 146 are known. In these known rotor descaling devices are on rotating beams or rotating nozzle holders Spray nozzles are arranged, which are directed against the workpiece surface to be descaled. The axis of rotation is generally perpendicular to the workpiece surface to be descaled aligned.

Hierbei entstehen je nach der Relativbewegung zwischen dem Werkstück und der rotierenden bzw. den rotierenden Spritzdüsen, welche Relativbewegung von der Bewegung des Werkstückes und der Drehzahl der Düsen abhängt, sowie in Abhängigkeit von der Anzahl der Düsen Flüssigkeits-Beaufschlagungsmuster, die von einzelnen Spritzkurven gebildet werden, die die Form von verschlungenen Radlinien aufweisen. Dadurch bedingt kommt es zur Mehrfachbeaufschlagung ein- und derselben Werkstückoberfläche mit Flüssigkeitsstrahlen. Nachteilig ist der dabei auftretende große Verbrauch an aufgesprühter Flüssigkeit und damit verbunden eine größere Abkühlung des Werkstückes, als es eigentlich für die Entzunderung notwendig wäre.This creates depending on the relative movement between the workpiece and the rotating one or the rotating spray nozzles, which relative movement from the movement of the Workpiece and the speed of the nozzles depends, as well as depending on the number of Nozzles liquid loading patterns, which are formed by individual spray curves, which are in the form of tortuous wheel lines. This leads to Multiple application of one and the same workpiece surface with liquid jets. A disadvantage is the large consumption of sprayed-on liquid, and thus connected a greater cooling of the workpiece than it is actually for descaling would be necessary.

Aus der EP-A 0 640 413 ist es bekannt, zur Verminderung der Flüssigkeits-Beaufschlagung die Flüssigkeitsstrahlen gegen die Bewegungsrichtung des Werkstückes geneigt auf die Oberfläche des Werkstückes aufzuspritzen. Dies wird gemäß diesem Dokument dadurch verwirklicht, daß der Flüssigkeitsstrahl über jenen Teil seiner Rotationsbewegung abgedeckt wird, in dem er der Forderung, gegen die Bewegungsrichtung des Werkstückes gerichtet zu sein, nicht mehr entspricht. Auch hierbei ist jedoch nach wie vor ein hoher Flüssigkeitsverbrauch gegeben, wenn auch nicht die gesamte Flüssigkeit auf das Werkstück auftrifft.From EP-A 0 640 413 it is known to reduce the exposure to liquids the liquid jets are inclined against the direction of movement of the workpiece Spray the surface of the workpiece. This is done according to this document realizes that the liquid jet is covered over that part of its rotational movement is directed towards the direction of movement of the workpiece be no longer corresponds. However, this is still a high one Given liquid consumption, though not all of the liquid on the workpiece hits.

Rotor-Entzunderungseinrichtungen der eingangs beschriebenen Art sind aus der US-A 5 220 935 und der DE -A 23 55 893 bereits bekannt. Eine Verringerung des Flüssigkeitsbedarfs wird hierbei erreicht, indem der Flüssigkeitsstrahl intermittierend ausgebildet ist. Weiters wird eine Doppelbeaufschlagung von Werkstückoberflächen mit Flüssigkeitsstrahlen und damit eine unnötige Unterkühlung des Walzgutes, insbesondere im Hinblick auf einen nachfolgenden Walzvorgang, vermieden. Diese Ausführungsform ermöglicht jedoch noch keine optimale Entzunderung eines Werkstückes bei minimalem Flüssigkeitsbedarf.Rotor descaling devices of the type described above are from the US-A 5 220 935 and DE-A 23 55 893 are already known. A decrease in Liquid demand is achieved here by the liquid jet being intermittent is trained. Furthermore, a double application of workpiece surfaces with Liquid jets and thus unnecessary supercooling of the rolling stock, especially in the With regard to a subsequent rolling process, avoided. This embodiment however, does not yet enable optimal descaling of a workpiece with minimal Fluid requirement.

Ein besonderer Effekt der intermittierenden Beaufschlagung mit Flüssigkeitsstrahlen ist darin zu sehen, daß aufgrund der ein- oder mehrmaligen Unterbrechung des Flüssigkeitstrahles Druckspitzen entstehen, die sich als Strahldruckerhöhungen auswirken, wodurch eine wesentliche Verbesserung der Entzunderungswirkung erzielt wird. Die Strahldrücke der Flüssigkeitsstrahlen erreichen Spitzenwerte, die ein Vielfaches der bei konventionellen Verfahren bekannten konstanten Strahldrücke ausmachen. Es entstehen erfindungsgemäß so hohe Auftreffdrücke der Flüssigkeitsstrahlen an der Oberfläche des Werkstückes, daß der Flüssigkeitsdruck beträchtlich abgesenkt werden kann und eine verbesserte Entzunderungswirkung gegeben ist.There is a special effect of the intermittent application of liquid jets to see that due to the one or more interruptions in the liquid jet Pressure peaks arise, which act as increases in jet pressure, causing a significant improvement in descaling is achieved. The jet pressures of the Liquid jets reach peak values that are many times that of conventional ones Process known constant jet pressures. According to the invention, it arises in this way high impact pressures of the liquid jets on the surface of the workpiece that the Fluid pressure can be significantly reduced and improved Descaling effect is given.

Die Erfindung bezweckt die Vermeidung der oben geschilderten Nachteile und Schwierigkeiten und stellt sich die Aufgabe, ein Verfahren sowie eine Einrichtung zur Durchführung des Verfahrens zu schaffen, bei dem der durch die intermittierende Bildung des Flüssigkeitsstrahles hervorgerufene Effekt erhöhter Strahldrücke verstärkt und über die Oberfläche des Werkstückes verteilt wird. Weiters soll eine optimale Entzunderung bei Minimierung des Flüssigkeitsbedarfes ermöglicht werden. Insbesondere soll es möglich sein, nicht nur den Flüssigkeitsbedarf zu senken, sondern auch den Flüssigkeitsdruck zu reduzieren, ohne Einbußen hinsichtlich der Qualität der zu entzundernden Oberflächen hinnehmen zu müssen.The invention aims to avoid the disadvantages and difficulties described above and sets itself the task of a method and a facility for carrying out the To create process in which by the intermittent formation of the liquid jet caused effect of increased jet pressures intensified and over the surface of the Workpiece is distributed. Furthermore, an optimal descaling with minimization of the Fluid requirements are made possible. In particular, it should be possible, not just that Lower fluid requirements, but also reduce fluid pressure without Losing in terms of the quality of the surfaces to be descaled.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Aussetzen der Bildung eines Flüssigkeitsstrahles zwei- oder mehrmals hintereinander, jedoch nur kurzzeitig, d.h. maximal über eine Flüssigkeitsstrahl-Rotation von 10°, vorzugsweise 5°, erfolgt. This object is achieved in that the suspension of the formation of a Liquid jet two or more times in succession, but only for a short time, i.e. maximum via a liquid jet rotation of 10 °, preferably 5 °.

Für Werkstücke mit größeren Oberflächen, insbesondere für Walzgut, ist es von Vorteil, wenn mehrere Flüssigkeitsstrahlen gebildet werden, wobei jeweils ein Flüssigkeitsstrahl mittels einer eigenen Düse gebildet wird und während einer Umdrehung jeweils einem eigenen Teilbereich der Oberfläche des zu entzundernden Werkstückes zugeordnet ist.For workpieces with larger surfaces, in particular for rolling stock, it is advantageous if a plurality of liquid jets are formed, each with a liquid jet by means of a own nozzle is formed and during each revolution a separate section is assigned to the surface of the workpiece to be descaled.

Hierbei werden zweckmäßig die Flüssigkeitsstrahlen gleichzeitig gebildet.In this case, the liquid jets are expediently formed at the same time.

Eine Rotor-Entzunderungseinrichtung zur Durchführung des erfindungsgemäßen Verfahrens mit einer Flüssigkeitszubringerleitung zu einem Stator und einem gegenüber dem Stator drehbar gelagerten Rotor, der mit mindestens einer Düse zur Bildung eines Flüssigkeitsstrahles versehen ist, ist dadurch gekennzeichnet, daß zwischen dem Rotor und dem Stator eine Unterbrechungseinrichtung, mit der die Flüssigkeitszufuhr zu einer Düse intermittierend durchführbar ist, vorgesehen ist.A rotor descaling device for performing the method according to the invention with a liquid feed line to a stator and one opposite the stator rotatably mounted rotor with at least one nozzle to form a liquid jet is provided, is characterized in that between the rotor and the stator Interruption device with which the liquid supply to a nozzle is intermittent is feasible is provided.

Zweckmäßig ist die Unterbrechungseinrichtung von einer gegenüber dem Stator unbeweglich angeordneten Steuerscheibe gebildet, die mit mindestens einer Steueröffnung zwecks zeitlich begrenzten Durchtritts von Flüssigkeit zur Düse versehen ist.The interruption device is expediently immovable relative to the stator arranged control disc formed with at least one control opening for the purpose of time limited passage of liquid to the nozzle is provided.

Eine bevorzugte Ausführungsform ist dadurch gekennzeichnet,

  • daß die Flüssigkeitszubringerleitung leitungsmäßig in eine am Rotor vorgesehene Flüssigkeitskammer mündet,
  • daß der Rotor mit einer die Flüssigkeit zur Düse leitenden Durchlaßöffnung versehen ist,
  • daß die Durchlaßöffnung mit einer Mündung in die Flüssigkeitskammer mündet und
  • daß die Durchlaßöffnung mittels der Steuerscheibe intermittierend verschließbar und bei deckungsgleicher Lage der Mündung der Durchlaßöffnung mit der Steueröffnung freigegeben ist.
A preferred embodiment is characterized in that
  • that the liquid feed line opens into a liquid chamber provided on the rotor,
  • that the rotor is provided with a passage opening which conducts the liquid to the nozzle,
  • that the passage opening opens into the liquid chamber with a mouth and
  • that the passage opening can be closed intermittently by means of the control disk and is released when the mouth of the passage opening is congruent with the control opening.

Eine konstruktiv einfache Lösung ist dadurch gekennzeichnet, daß eine Mehrzahl von Durchlaßöffnungen vorgesehen ist und jede Durchlaßöffnung zu jeweils einer Düse des Rotors führt, wobei zumindest zwei Mündungen der Durchlaßöffnungen in jeweils unterschiedlichen Radialabständen von der Rotationsachse des Rotors in die Flüssigkeitskammer münden und die Steuerscheibe jeweils korrespondierend zu einer Mündung einer Durchlaßöffnung mit einer einen Flüssigkeitsdurchtritt von der Flüssigkeitskammer zur Durchlaßöffnung gestattenden Steueröffnung versehen ist. A structurally simple solution is characterized in that a plurality of Passage openings are provided and each passage opening to a respective nozzle of the rotor leads, with at least two mouths of the passage openings each in different Radial distances from the axis of rotation of the rotor open into the liquid chamber and the Control disk each corresponding to an opening of a passage opening with a allow a liquid passage from the liquid chamber to the passage opening Control opening is provided.

Hierbei sind zweckmäßig mehrere Steueröffnungen in ein- und demselben Radialabstand von der Rotationsachse des Rotors vorgesehen, wobei vorteilhaft die in ein- und demselben Radialabstand von der Rotationsachse des Rotors angeordneten Steueröffnungen gruppenweise zusammengefaßt sind.Here, several control openings are expedient at one and the same radial distance from the axis of rotation of the rotor is provided, which advantageously in one and the same Radial distance from the axis of rotation of the rotor arranged control openings are grouped together.

Soll ein Flüssigkeitsstrahl über eine etwas längere Wegstrecke, d.h. nicht nur punktförmig, aufrecht erhalten werden, ist nach einer bevorzugten Ausführungsform eine Steueröffnung als sich in Umfangsrichtung der Steuerscheibe erstreckender Steuer-Schlitz ausgebildet.If a liquid jet is to be driven over a somewhat longer distance, i.e. not just punctiform, are maintained, is a control opening as a preferred embodiment Control slot extending in the circumferential direction of the control disk.

Es ist von besonderem Vorteil, wenn die Düsen als Rundstrahldüsen ausgebildet sind. Hierdurch können im Vergleich zu Flachstrahldüsen höhere Strahldrücke erreicht werden, da der Strahl bei Rundstrahldüsen nur minimal aufgeweitet wird.It is particularly advantageous if the nozzles are designed as omnidirectional nozzles. In this way, higher jet pressures can be achieved in comparison to flat jet nozzles, since the jet is only minimally expanded with omnidirectional nozzles.

Die Erfindung ist nachfolgend anhand der Zeichnung an mehreren Ausführungsbeispielen näher erläutert, wobei Fig. 1 einen Schnitt durch eine Rotor-Entzunderungseinrichtung in schematischer Darstellung veranschaulicht, wobei der Schnitt durch die Rotationsachse gelegt ist Fig. 2 zeigt eine Ansicht der Rotor-Entzunderungseinrichtung in Richtung des Pfeiles II.
Fig. 3 zeigt eine Teil-Draufsicht auf den Rotorkopf gemäß der Linie III-III der Fig. 1 und Fig. 4 eine Draufsicht auf eine Steuerscheibe gemäß Pfeil IV der Fig. 1. Fig. 5 veranschaulicht ein Spritzbild auf einem Walzgut, das in Draufsicht dargestellt ist. Fig. 6 veranschaulicht die Verwendung erfindungsgemäßer Rotor-Entzunderungseinrichtungen für besonders breite Werkstücke, wie beispielsweise Stranggußbrammen etc..The invention is explained in more detail below with the aid of several exemplary embodiments, with FIG. 1 schematically illustrating a section through a rotor descaling device, the section being taken through the axis of rotation. FIG. 2 shows a view of the rotor descaling device in the direction of FIG Arrow II.
3 shows a partial top view of the rotor head according to line III-III of FIG. 1 and FIG. 4 shows a top view of a control disk according to arrow IV of FIG. 1. FIG. 5 illustrates a spray pattern on a rolling stock which is shown in FIG Top view is shown. 6 illustrates the use of rotor descaling devices according to the invention for particularly wide workpieces, such as continuous cast slabs etc.

Bei einer Rotor-Entzunderungseinrichtung 1 ist in einem Getriebegehäuse 2 ein um eine Rotationsachse 3 drehbar gelagerter Rotor 4 mit seiner Rotorwelle 5 über Lager 6 abgestützt. An der Rotorwelle 5 ist ein Antriebsritzel 7, das mit einem nicht näher dargestellten Rotorantrieb kämmt, befestigt. Am aus dem Getriebegehäuse 2 nach außen ragenden Ende der Rotorwelle 5 ist ein Rotorkopf 8 vorgesehen, der mit sich radial nach außen erstreckenden Konsolen 9 versehen ist, die Spritzdüsen 10 tragen. Gemäß dem dargestellten Ausführungsbeispiel sind zwölf Konsolen 9, die umfangsmäßig um den Rotorkopf 8 gleichmäßig verteilt angeordnet sind, vorgesehen, von denen jeweils eine Konsole 9 mit einer Spritzdüse 10 versehen ist. Die Spritzdüsen 10 sind als Rundstrahldüsen ausgebildet und sind an jeweils einer sich von der Spritzdüse 10 durch die Konsole 9 und den Rotorkopf 8 radial nach innen erstreckenden Durchlaßöffnung 11 leitungsmäßig angeschlossen.In the case of a rotor descaling device 1, one by one is in a transmission housing 2 Rotation axis 3 rotatably supported rotor 4 with its rotor shaft 5 supported by bearings 6. On the rotor shaft 5 is a drive pinion 7, which is not shown with a Rotor drive combs, fastened. At the end protruding out of the gear housing 2 Rotor shaft 5, a rotor head 8 is provided which extends radially outwards Consoles 9 is provided which carry spray nozzles 10. According to the illustrated Exemplary embodiments are twelve consoles 9, which extend circumferentially around the rotor head 8 are evenly distributed, provided, each of which a console 9 with a Spray nozzle 10 is provided. The spray nozzles 10 are designed as omnidirectional nozzles and are on one each radially from the spray nozzle 10 through the bracket 9 and the rotor head 8 inwardly extending passage opening 11 connected by line.

Die Rotorwelle 5 ist hohl ausgebildet und wird im Inneren von einem Hohlrohr 12, den sogenannten Stator, durchsetzt. Dieser Stator 12 ragt mit einem Ende 13 aus dem Getriebegehäuse 2 und ist mit diesem Ende 13 an eine Druckmedium-Zuleitung 14, wie eine Hochdruck-Wasserleitung, angeschlossen. Zwischen dem Stator 12 und der Rotorwelle 5 bzw. dem Rotorkopf 8, der von dem Stator 12 durchragt wird, sind Flüssigkeitsdichtungen 15 vorgesehen. Am durch den Rotorkopf 8 nach außen ragenden Ende 16 des Stators 12 ist eine mit dem Stator 12 fest verbundene Steuerscheibe 17 mit Steueröffnungen 18, 18', 18" befestigt. Sowohl die Steuerscheibe 17 als auch der Stator 12 sind unter Bildung einer Flüssigkeitskammer 19 (Hochdruck-Flüssigkeitskammer) mittels eines am Rotor 8 dicht befestigten Deckels 20 überdeckt.The rotor shaft 5 is hollow and is inside a hollow tube 12, the so-called stator. This stator 12 protrudes with one end 13 from the Gear housing 2 and is with this end 13 to a pressure medium supply line 14, such as a High pressure water pipe, connected. Between the stator 12 and the rotor shaft 5 or the rotor head 8, through which the stator 12 extends, are liquid seals 15 intended. At the end 16 of the stator 12 projecting outwards through the rotor head 8 there is one with the stator 12 firmly connected control disc 17 with control openings 18, 18 ', 18 " attached. Both the control disk 17 and the stator 12 are forming one Liquid chamber 19 (high-pressure liquid chamber) by means of a tight on the rotor 8 attached cover 20 covers.

Wie insbesondere aus Fig. 4 zu ersehen ist, sind die Steueröffnungen 18, 18', 18" der Steuerscheibe in unterschiedlichen Radialabständen r1, r2 und r3 zur Rotationsachse 3 der Rotorwelle 5 vorgesehen, wobei die Radialabstände r1 bis r3 so gewählt sind, daß die Steueröffnungen 18 bis 18" jeweils fluchtend zu den rotorinnenseitig vorgesehenen Mündungen 21, 21', 21" der Durchlaßöffnungen 11, die aus Fig. 3 ersichtlich sind, bringbar sind, d.h. daß sich die Durchlaßöffnungen 11 ebenfalls bis zu unterschiedlichen Radialabständen r1 bis r3 von der Rotationsachse 3 der Rotorwelle 5 nach innen erstrecken.As can be seen in particular from FIG. 4, the control openings 18, 18 ', 18 "of the control disk are provided at different radial distances r 1 , r 2 and r 3 from the axis of rotation 3 of the rotor shaft 5, the radial distances r 1 to r 3 being so are selected so that the control openings 18 to 18 "can be brought into alignment with the orifices 21, 21 ', 21" of the through openings 11 provided on the inside of the rotor, which can be seen from FIG. 3, ie the through openings 11 are also up to different radial distances r 1 to r 3 extend inward from the axis of rotation 3 of the rotor shaft 5.

Gemäß der in Fig. 4 dargestellten Steuerscheibe 17 sind in ein- und demselben Radialabstand r1 bis r3 von der Rotationsachse 3 des Rotors 4 jeweils mehrere Steueröffnungen 18, 18', 18" vorgesehen, die auch, wie in Fig. 4 für die im geringsten Radialabstand r1 vorgesehenen Durchlaßöffnungen 18" dargestellt, gruppenweise zusammengefaßt sein können. Die Steueröffnungen 18, 18', 18" können aber auch lediglich als Bohrungen ausgeführt sein, so daß bei einer Rotation des Rotorkopfes 8 um die Rotationsachse 3 die innenseitigen Mündungen 21 bis 21" der Durchlaßöffnungen 11 nur jeweils kurzzeitig mit den Steueröffnungen 18, 18', 18" der während der Rotation stillstehenden Steuerscheibe 17 fluchten.According to the control disk 17 shown in FIG. 4, a plurality of control openings 18, 18 ', 18 "are provided at one and the same radial distance r 1 to r 3 from the axis of rotation 3 of the rotor 4, which, as in FIG In the smallest radial distance r 1 provided through openings 18 "shown, can be summarized in groups. The control openings 18, 18 ', 18 "can, however, also be designed only as bores, so that when the rotor head 8 rotates about the axis of rotation 3, the inside openings 21 to 21" of the passage openings 11 only briefly with the control openings 18, 18'. , 18 "of the control disc 17 which is stationary during the rotation.

Gemäß Fig. 4 sind die Steueröffnungen 18, 18', 18" als Schlitze ausgebildet, so daß das Fluchten der rotationskopfinnenseitigen Mündungen 21 bis 21" der Durchlaßöffnungen 11 mit den Steuer-Schlitzen 18, 18', 18" über einen längeren Bereich der Rotation gegeben ist.4, the control openings 18, 18 ', 18 "are designed as slots, so that the Align the orifices 21 to 21 "of the through openings 11 on the inside of the rotary head the control slots 18, 18 ', 18 "over a longer range of rotation.

Die Funktion der Rotor-Entzunderungseinrichtung 1 ist folgende:The function of the rotor descaling device 1 is as follows:

Während ein Werkstück 22 - gemäß Fig. 5 beispielsweise ein gewalztes und noch zu walzendes Blech - mit seiner zu entzundernden Oberfläche 23 in einer Ebene 24 (vgl. Fig. 6) an der Rotor-Entzunderungseinrichtung 1, deren Rotationsachse 3 etwa senkrecht zu dieser Ebene 24 gerichtet ist, vorbeibewegt wird, wird die Flüssigkeitskammer 19 mit der auf die Werkstückoberfläche 23 zu sprühenden Flüssigkeit druckbeaufschlagt und der Rotor 4, d.h. die Rotorwelle 5 mitsamt dem Rotorkopf 8, in Drehung versetzt. Hierdurch gelangen mit Hilfe der Steuerscheibe 17 jeweils unterschiedliche Durchlaßöffnungen 11 mit der Flüssigkeitskammer 19 in leitungsmäßige Verbindung, so daß jeweils ein oder mehrere der Düsen 10 mit Druckflüssigkeit beaufschlagt werden, so daß Flüssigkeitsstrahlen gebildet werden.While a workpiece 22 - according to FIG. 5, for example a rolled and still to be rolled Sheet metal - with its surface 23 to be descaled in a plane 24 (see FIG. 6) on the Rotor descaling device 1, whose axis of rotation 3 is approximately perpendicular to this plane 24 is directed past, the liquid chamber 19 with the on Workpiece surface 23 pressurized liquid to be sprayed and the rotor 4, i.e. the Rotor shaft 5 together with the rotor head 8, set in rotation. This way, with the help of Control disk 17 each have different passage openings 11 with the liquid chamber 19 in line connection, so that in each case one or more of the nozzles 10 with Hydraulic fluid are applied so that liquid jets are formed.

Der Flüssigkeitsstrahl wird so lange gebildet, so lange die Steueröffnung 18, 18', 18" mit der entsprechenden Durchlaßöffnung 11 leitungsmäßig verbunden ist. Kommt es zu einer Unterbrechung dieser Verbindung, wird der Flüssigkeitsstrahl unterbrochen, und er wird erst wieder dann gebildet, wenn die nächste Steueröffnung 18, 18', 18" - oder dieselbe Steueröffnung nach einer Rotation um 360° - wiederum mit der Durchlaßöffnung 11 leitungsmäßig verbunden ist. Es kommt somit zu einem zeitweilig aussetzenden Flüssigkeitsstrahl.The liquid jet is formed as long as the control opening 18, 18 ', 18 "with the corresponding passage opening 11 is connected by line. If there is one Disconnection of this connection, the liquid jet is interrupted and it becomes again formed when the next control opening 18, 18 ', 18 "- or the same Control opening after rotation through 360 ° - again with the passage opening 11 is connected by line. There is therefore a temporary suspension Liquid jet.

Die am Stator 12 unbeweglich befestigte Steuerscheibe 17 bildet somit eine Unterbrechungseinrichtung, mit der die Flüssigkeitszufuhr zu jeweils einer Düse 10 in Intervallen unterbrechbar ist.The control disk 17 immovably attached to the stator 12 thus forms one Interruption device with which the liquid supply to each nozzle 10 in Intervals are interruptible.

Durch entsprechende Anordnung der Steueröffnungen 18, 18', 18" gelingt es, ein Spritzbild, wie es beispielsweise in Fig. 5 dargestellt ist, zu erzeugen. Die kreisbogenähnlichen Linien 25 veranschaulichen das Auftreffen der intermittierend gebildeten Flüssigkeitsstrahlen auf der Werkstückoberfläche 23, während diese gemäß der durch den Pfeil 26 dargestellten Vorschubrichtung an der Rotor-Entzunderungseinrichtung 1 vorbeibewegt wird.By arranging the control openings 18, 18 ', 18 "accordingly, a spray pattern can be achieved, as shown in Fig. 5, for example. Circular lines 25 illustrate the impingement of the intermittently formed liquid jets on the Workpiece surface 23, while this is shown by the arrow 26 Feed direction is moved past the rotor descaling device 1.

Hierbei wird - bei Verwendung einer Steuerscheibe 17 gemäß Fig. 4 - der äußerste Abschnitt a3 der kreisbogenähnlichen Linie 25 jeweils von einer Düse 10 beaufschlagt, die durch die Steuer-Schlitze 18 im größten radialen Abstand r3 von der Rotationsachse 3 des Rotors 4 angeordnet sind.When using a control disk 17 according to FIG. 4, the outermost section a 3 of the arc-like line 25 is acted upon by a nozzle 10, which is arranged through the control slots 18 at the greatest radial distance r 3 from the axis of rotation 3 of the rotor 4 are.

Zur Mittellinie 27 des Werkstückes 22 hin anschließende Abschnitte a2 werden von Düsen 10 beaufschlagt, die durch im mittleren Abstand r2 von der Drehachse 3 angeordnete Steueröffnungen 18' versorgt werden, und die drei mittigen Abschnitte a1 werden durch die drei eng benachbart angeordneten Steuer-Schlitze 18", die im geringsten Abstand r1 von der Rotationsachse 3 des Rotors 4 angeordnet sind, gebildet.Sections a 2 adjoining the center line 27 of the workpiece 22 are acted upon by nozzles 10, which are supplied by control openings 18 ′ arranged at an average distance r 2 from the axis of rotation 3, and the three central sections a 1 are provided by the three closely arranged control Slots 18 ", which are arranged at the smallest distance r 1 from the axis of rotation 3 of the rotor 4, are formed.

Wichtig ist, daß die Kreisbogenabschnitte Fig. 5 a1 bis a3 ortsfest sind (bei Null-Vorschub des Werkstückes), d.h. die Position der Abschnitte von a1 bis a3 wird, weil die Steuerscheibe stillsteht, nicht in Drehrichtung verändert. It is important that the circular arc sections Fig. 5 a 1 to a 3 are stationary (with zero feed of the workpiece), ie the position of the sections from a 1 to a 3 is not changed in the direction of rotation because the control disk is stationary.

Fig. 6 veranschaulicht die Anordnung mehrerer Rotor-Entzunderungseinrichtungen 1 für große Werkstückoberflächen 23, wie sie beispielsweise bei Brammen oder Breitbändern auftreten.Fig. 6 illustrates the arrangement of several large rotor descaling devices 1 Workpiece surfaces 23, such as occur with slabs or wide belts.

Die Erfindung beschränkt sich nicht auf das in der Zeichnung dargestellte Ausführungsbeispiel, sondern sie kann in verschiedener Hinsicht modifiziert werden. Beispielsweise können Düsen 10 in unterschiedlichen radialen Abständen von der Rotationsachse 3 des Rotors 4 vorgesehen sein, und es können die Steueröffnungen 18, 18', 18" derart angeordnet sein, daß mehrere Düsen 10 gleichzeitig oder die Düsen 10 einzeln hintereinander intermittierend mit Flüssigkeit beaufschlagt werden.The invention is not limited to the embodiment shown in the drawing, it can be modified in various ways. For example, nozzles 10 are provided at different radial distances from the axis of rotation 3 of the rotor 4 and the control openings 18, 18 ', 18 "can be arranged such that several Nozzles 10 simultaneously or the nozzles 10 one after the other intermittently with liquid be charged.

Gruppen von Düsen können auch unterschiedliche Düsendurchmesser aufweisen oder sie können auch von unterschiedlichen Düsenarten gebildet sein. Hierdurch kann die Wasserbeaufschlagung über den Querschnitt des zu entzundemden Werkstückes konstant gehalten werden.Groups of nozzles can also have different nozzle diameters or they can also be formed by different types of nozzles. This allows the Constant exposure to water across the cross-section of the workpiece to be ignited being held.

Claims (11)

  1. Method for descaling a workpiece (22), in particular a rolled product, the workpiece (22) being moved past a rotor descaling device (1) and, at this device, at least one jet of liquid, which rotates about an axis of rotation (3) which intersects that surface (23) of the workpiece (22) which is to be descaled, being sprayed onto the surface (23) which is to be descaled, the jet of liquid being formed intermittently, i.e. in such a way that it stops from time to time, characterized in that the formation of a jet of liquid is stopped two or more times in succession, but only for a short time, i.e. for a liquid jet rotation of at most 10°, preferably 5°.
  2. Method according to Claim 1, characterized in that a plurality of jets of liquid are formed, in each case one jet of liquid being formed by means of a dedicated nozzle (10) and, during a revolution, being assigned to in each case a dedicated partial region (a1, a2, a3) of the surface (23) of the workpiece (22) which is to be descaled.
  3. Method according to Claim 2, characterized in that the jets of liquid are formed simultaneously.
  4. Rotor descaling device for carrying out the method according to one of Claims 1 to 3, having a liquid feedline (14) leading to a stator (12) and a rotor (4) which is mounted so that it can rotate with respect to the stator (12) and is provided with at least one nozzle (10) for forming a jet of liquid, characterized in that an interrupter device (17), which can be used to supply the liquid to a nozzle (10) intermittently, is provided between the rotor (4) and the stator (12).
  5. Device according to Claim 4, characterized in that the interrupter device is formed by a control disc (17) which is arranged immoveably with respect to the stator (12) and is provided with at least one control opening (18, 18', 18'') in order to allow passage of liquid to the nozzle (10) in a manner which is restricted in terms of time.
  6. Device according to Claim 5, characterized
    in that the liquid feedline (14) opens, at the line, into a liquid chamber (19) provided on the rotor (4),
    in that the rotor (4) is provided with a passage opening (11) which guides the liquid to the nozzle (10),
    in that the passage opening (11), by means of a mouthpiece (21 to 21''), opens into the liquid chamber (19), and
    in that the passage opening (11) can be closed off intermittently by means of the control disc (17) and is opened when the mouthpiece (21) of the passage opening (11) and the control opening (18, 18', 18'') are in congruent positions.
  7. Device according to Claim 6, characterized in that a plurality of passage openings (18, 18', 18'') are provided and each passage opening (18, 18', 18'') leads to in each case one nozzle (10) of the rotor (4), at least two mouthpieces (21) of the passage openings (18, 18', 18'') opening into the liquid chamber (19) at in each case different radial distances (r1, r2, r3) from the axis of rotation (3) of the rotor (4), and the control disc (17) being provided with a control opening (18, 18', 18'') which in each case corresponds to a mouthpiece (21) of a passage opening (11) and allows passage of liquid from the liquid chamber to the passage opening.
  8. Device according to Claim 7, characterized in that a plurality of control openings (18, 18', 18'') are provided at the same radial distance (r1, r2, r3) from the axis of rotation (3) of the rotor (4).
  9. Device according to Claim 8, characterized in that the control openings (18, 18', 18'') which are arranged at the same radial distance (r1, r2, r3) from the axis of rotation (3) of the rotor (4) are combined in groups.
  10. Device according to one of Claims 5 to 9, characterized in that a control opening (18, 18', 18'') is designed as a control slot which extends in the circumferential direction of the control disc (17) (Fig. 4).
  11. Device according to one of Claims 4 to 10, characterized in that the nozzles (10) are designed as round jet nozzles.
EP97901471A 1996-02-02 1997-01-29 Workpiece descaling process Expired - Lifetime EP0879101B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT19596 1996-02-02
AT195/96 1996-02-02
AT0019596A AT406234B (en) 1996-02-02 1996-02-02 METHOD FOR DESCALING A WORKPIECE
PCT/AT1997/000015 WO1997027955A1 (en) 1996-02-02 1997-01-29 Workpiece descaling process

Publications (2)

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EP0879101A1 EP0879101A1 (en) 1998-11-25
EP0879101B1 true EP0879101B1 (en) 2001-11-14

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US (1) US6149733A (en)
EP (1) EP0879101B1 (en)
JP (1) JP2000504277A (en)
KR (1) KR19990082108A (en)
AT (1) AT406234B (en)
CA (1) CA2245575C (en)
DE (1) DE59705387D1 (en)
WO (1) WO1997027955A1 (en)

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AT507663B1 (en) * 2009-04-09 2010-07-15 Siemens Vai Metals Tech Gmbh METHOD AND DEVICE FOR PREPARING HOT ROLLING MATERIAL
US9321067B2 (en) * 2010-07-08 2016-04-26 Federal Signal Corporation Seal cartridge for a rotating nozzle assembly
DE102015206393A1 (en) 2015-04-10 2016-10-13 Sms Group Gmbh Device for cleaning the surface of an object
DE102015226657A1 (en) 2015-12-23 2017-06-29 Sms Group Gmbh Rotorentzunderung
DE102015226658A1 (en) * 2015-12-23 2017-06-29 Sms Group Gmbh Device for descaling a workpiece
DE102016217560A1 (en) 2016-03-18 2017-09-21 Sms Group Gmbh Device and method for descaling a workpiece
AU2018437298A1 (en) 2018-08-21 2021-03-18 Hermetik Hydraulik Ab A device and method for descaling rolling stock
CN115254994B (en) * 2022-08-24 2024-09-03 重庆钢铁股份有限公司 Titanium plate rolling purging method, device, equipment and storage medium

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Publication number Publication date
CA2245575A1 (en) 1997-08-07
AT406234B (en) 2000-03-27
ATA19596A (en) 1999-08-15
KR19990082108A (en) 1999-11-15
DE59705387D1 (en) 2001-12-20
CA2245575C (en) 2005-06-21
WO1997027955A1 (en) 1997-08-07
EP0879101A1 (en) 1998-11-25
JP2000504277A (en) 2000-04-11
US6149733A (en) 2000-11-21

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