EP1118396B1 - Device for hydromechanical descaling - Google Patents

Device for hydromechanical descaling Download PDF

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Publication number
EP1118396B1
EP1118396B1 EP00123086A EP00123086A EP1118396B1 EP 1118396 B1 EP1118396 B1 EP 1118396B1 EP 00123086 A EP00123086 A EP 00123086A EP 00123086 A EP00123086 A EP 00123086A EP 1118396 B1 EP1118396 B1 EP 1118396B1
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EP
European Patent Office
Prior art keywords
workpiece
jet nozzles
liquid jet
descaling
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00123086A
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German (de)
French (fr)
Other versions
EP1118396A3 (en
EP1118396A2 (en
Inventor
Hans-Joachim Pahnke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wepuko Hydraulik & Co Pumpen- und Kompressorenfabrik Firma GmbH
Original Assignee
Wepuko Hydraulik & Co Pumpen- und Kompressorenfabrik Firma GmbH
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Application filed by Wepuko Hydraulik & Co Pumpen- und Kompressorenfabrik Firma GmbH filed Critical Wepuko Hydraulik & Co Pumpen- und Kompressorenfabrik Firma GmbH
Publication of EP1118396A2 publication Critical patent/EP1118396A2/en
Publication of EP1118396A3 publication Critical patent/EP1118396A3/en
Application granted granted Critical
Publication of EP1118396B1 publication Critical patent/EP1118396B1/en
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Classifications

    • 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 device for hydromechanical descaling with several liquid jet nozzles, on which the to be descaled Workpiece is moved past, and with at least one Liquid pump.
  • At a defined feed rate of the workpiece can be off the workpiece length are calculated that time in which the nozzles have to radiate. About the number of nozzles and about this jet time can then be the total volume flow or the total amount of water calculate that comes out of the nozzles. The required total volume flow and determine the required pressure of the liquid the pump size and / or the number of pumps during configuration a Entzu shoresstrom.
  • the present invention is based on the object at a Device for hydromechanical descaling the number of required liquid pumps and / or their performance compared Descaling systems with annularly arranged liquid jet nozzles to be able to reduce.
  • the object is achieved with a device for hydromechanical descaling with several liquid jet nozzles to which the descaling workpiece is moved past, and with at least one Solved liquid pump, which is characterized in that the Liquid jet nozzles are arranged in one place and that the device comprises means for moving the workpiece (11) several times past the liquid jet nozzles, each time only part of the liquid jet nozzles are active.
  • the liquid jet nozzles no longer ring in a plane arranged around the workpiece and all at the same time active or not active, but they are now rather arranged or driven, that the individual surface areas of the workpiece during transport be processed one after the other at the liquid jet nozzles.
  • the total volume flow of the liquid to the individual Split points with liquid jet nozzles By this division the volume flow, the at least one liquid pump can be smaller be designed, or it can be the number of required pumps to reduce.
  • the total purchase price for the liquid pumps is So in a device according to the invention significantly lower than at known plants.
  • liquid jet nozzles In order to obtain an optimal descaling result, the liquid jet nozzles to arrange or control such that one after the other an all-round descaling of the workpiece is possible.
  • the liquid jet nozzles are preferably on bars or rings arranged, wherein the beams arranged pivotable about its longitudinal axis so that an optimal angle of impact of the liquid can be adjusted on the workpiece surface.
  • Fig. 1 shows a descaling device 10 according to the prior Technique with a total of four rings around a workpiece to be descaled 11 arranged around bars 12 to 15 with liquid jet nozzles 16, all in one plane and arranged and driven are that the workpiece 11 when passing through the annularly arranged liquid jet nozzles 16 machined on all sides becomes.
  • the workpiece 11 descaled over its entire length is a supplying the liquid jet nozzles 16, not shown here liquid pump or more such Fluid pumps switched to idle mode until the next Workpiece arrives.
  • liquid pump or more such Fluid pumps switched to idle mode until the next Workpiece arrives.
  • the device 10 according to the invention is designed so that the workpiece 11 in both directions through the liquid jet nozzles 16 is movable therethrough and with each passing of the liquid jet nozzles 16 only part of the nozzles 16 is active, so can the Total volume flow can be divided into several partial volume flows, which must be made available at a later time, so that now pumps of lower power or used in smaller numbers can be.
  • the state of the art known in the art descaling device 20 of FIG. 2 the here shown in side view, two spaced apart Make 21 and 22, at which liquid jet nozzles 23 for descaling the surface of the workpiece 11 are arranged.
  • the surface of the workpiece 11 At the Passing the workpiece 11 in the direction of arrow 24, the surface of the workpiece 11 first on the bottom and on the front descaled and then at the point 22 at the top and on the back side.
  • the two points 21 and 22 of descaling are thereby spaced by a distance D from each other, which is greater than the length L of the workpiece 11.
  • Fig. 3 shows a descaling device 30 with two liquid jet nozzles 31 provided bars 32 and 33, a descaling the top and the bottom of a workpiece 11 allow.
  • the Beams 32 and 33 are spaced by a distance D in the transport direction 34 of FIG Workpiece 11 spaced apart, which is greater than the length L of the workpiece 11.
  • the bars 32 and 33 are arranged in the same place.
  • the beams 32 and 33 are pivotable about their longitudinal axis 35, 36 arranged so that the impact angle of the liquid on the surface of the workpiece 11 is adjustable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Nozzles (23) producing liquid jets are distributed over several separate zones which are distanced from one another in the transport direction (24) of the workpiece (11). Alternatively, the nozzles are distributed over a single zone, and the workpiece is movable past them several times, with only a part of the nozzles being activated during each pass.

Description

Die Erfindung betrifft eine Vorrichtung zur hydromechanischen Entzunderung mit mehreren Flüssigkeitsstrahldüsen, an denen das zu entzundernde Werkstück vorbei bewegt wird, und mit mindestens einer Flüssigkeitspumpe.The invention relates to a device for hydromechanical descaling with several liquid jet nozzles, on which the to be descaled Workpiece is moved past, and with at least one Liquid pump.

Zur Entzunderung von Werkstücken, insbesondere von Walzgut, wird dieses im noch glühenden Zustand an Flüssigkeitsstrahldüsen vorbei bewegt, sodass die auf die Oberfläche des Werkstücks auftreffende Flüssigkeit sowohl durch die Temperaturspannung als auch durch den mechanischen Druck den Zunder von der Oberfläche entfernen kann. Jedes Stück der Oberfläche des Werkstücks muss dabei mit Hochdruckflüssigkeit bestrahlt werden. Aus diesem Grund werden die Flüssigkeitsstrahldüsen seither ringförmig um das Werkstück herum oder gezielt auf einzelne Flächen gerichtet angeordnet, sodass beim Hindurchbewegen durch die Flüssigkeitsstrahldüsen alle gewünschten Oberflächenbereiche des Werkstücks bearbeitet werden. Nachdem sich das glühende Werkstück durch die Flüssigkeitsstrahldüsen mit einer definierten Geschwindigkeit hindurchbewegt hat, wird die mindestens eine Flüssigkeitspumpe in eine drucklose Umlaufphase geschaltet, bis das nächste Werkstück eintrifft. Dies kann bis zu mehreren Minuten dauern. For the descaling of workpieces, in particular of rolling stock, is this moves in still glowing state past liquid jet nozzles, so that the liquid impinging on the surface of the workpiece both by the temperature voltage and by the mechanical pressure can remove the scale from the surface. Each piece of the surface of the workpiece must be filled with high-pressure liquid be irradiated. For this reason, the liquid jet nozzles become since then annular around the workpiece or targeted directed to individual surfaces, so when moving through through the liquid jet nozzles all the desired Surface areas of the workpiece are processed. After yourself the glowing workpiece through the liquid jet nozzles with a defined Speed has moved through, the at least one Liquid pump switched to a non-pressurized circulation phase until the next workpiece arrives. This can take up to several minutes.

Bei einer definierten Vorschubgeschwindigkeit des Werkstücks kann aus der Werkstücklänge diejenige Zeit errechnet werden, in der die Düsen strahlen müssen. Über die Anzahl der Düsen und über diese Strahlzeit lässt sich dann der Gesamtvolumenstrom bzw. die gesamte Wassermenge errechnen, die aus den Düsen austritt. Der benötigte Gesamtvolumenstrom und der erforderliche Druck der Flüssigkeit bestimmen die Pumpengröße und/oder die Anzahl der Pumpen bei der Projektierung einer Entzunderungsanlage.At a defined feed rate of the workpiece can be off the workpiece length are calculated that time in which the nozzles have to radiate. About the number of nozzles and about this jet time can then be the total volume flow or the total amount of water calculate that comes out of the nozzles. The required total volume flow and determine the required pressure of the liquid the pump size and / or the number of pumps during configuration a Entzunderungsanlage.

Aus der US 5,661,884 ist eine Vorrichtung bekannt geworden, die an einer ersten Stelle obere Flüssigkeitsstrahldüsen aufweist, die die Oberfläche eines Werkstücks bestrahlen und an einer zweiten Position, die von der ersten Position unterschiedlich ist, Flüssigkeitsstrahldüsen aufweist, die das Werkstück von unten bestrahlen.From US 5,661,884 a device has become known to the a first location has upper liquid jet nozzles that the surface irradiate a workpiece and at a second position, the different from the first position, has liquid jet nozzles, which irradiate the workpiece from below.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, bei einer Vorrichtung zur hydromechanischen Entzunderung die Anzahl der benötigten Flüssigkeitspumpen und/oder deren Leistung gegenüber Entzunderungsanlagen mit ringförmig angeordneten Flüssigkeitsstrahldüsen reduzieren zu können.The present invention is based on the object at a Device for hydromechanical descaling the number of required liquid pumps and / or their performance compared Descaling systems with annularly arranged liquid jet nozzles to be able to reduce.

Die Aufgabe wird mit einer Vorrichtung zur hydromechanischen Entzunderung mit mehreren Flüssigkeitsstrahldüsen, an denen das zu entzundernde Werkstück vorbei bewegt wird, und mit mindestens einer Flüssigkeitspumpe gelöst, die dadurch gekennzeichnet ist, dass die Flüssigkeitsstrahldüsen an einer Stelle angeordnet sind und dass die Vorrichtung Mittel aufweist zur Bewegung des Werkstücks (11) mehrmals an den Flüssigkeitsstrahldüsen vorbei, wobei jedes Mal nur ein Teil der Flüssigkeitsstrahldüsen aktiv ist. Im Gegensatz zu den Vorrichtungen nach dem Stand der Technik sind jetzt also die Flüssigkeitsstrahldüsen nicht mehr ringförmig in einer Ebene um das Werkstück angeordnet und alle gleichzeitig aktiv oder nicht aktiv, sondern sie sind jetzt vielmehr so angeordnet bzw. angesteuert, dass die einzelnen Oberflächenbereiche des Werkstücks beim Transport an den Flüssigkeitsstrahldüsen vorbei nacheinander bearbeitet werden. Dazu wird der Gesamtvolumenstrom der Flüssigkeit auf die einzelnen Stellen mit Flüssigkeitsstrahldüsen aufgeteilt. Durch diese Aufteilung des Volumenstroms kann die mindestens eine Flüssigkeitspumpe kleiner ausgelegt werden, oder es lässt sich die Anzahl der benötigten Pumpen reduzieren. Der Gesamtanschaffungspreis für die Flüssigkeitspumpen ist also bei einer erfindungsgemäßen Vorrichtung deutlich geringer als bei bekannten Anlagen.The object is achieved with a device for hydromechanical descaling with several liquid jet nozzles to which the descaling workpiece is moved past, and with at least one Solved liquid pump, which is characterized in that the Liquid jet nozzles are arranged in one place and that the device comprises means for moving the workpiece (11) several times past the liquid jet nozzles, each time only part of the liquid jet nozzles are active. in the Contrary to the devices of the prior art are now So the liquid jet nozzles no longer ring in a plane arranged around the workpiece and all at the same time active or not active, but they are now rather arranged or driven, that the individual surface areas of the workpiece during transport be processed one after the other at the liquid jet nozzles. For this purpose, the total volume flow of the liquid to the individual Split points with liquid jet nozzles. By this division the volume flow, the at least one liquid pump can be smaller be designed, or it can be the number of required pumps to reduce. The total purchase price for the liquid pumps is So in a device according to the invention significantly lower than at known plants.

Um ein optimales Entzunderungsergebnis zu erhalten, sind die Flüssigkeitsstrahldüsen derart anzuordnen oder anzusteuern, dass nacheinander eine allseitige Entzunderung des Werkstücks möglich ist.In order to obtain an optimal descaling result, the liquid jet nozzles to arrange or control such that one after the other an all-round descaling of the workpiece is possible.

Die Flüssigkeitsstrahldüsen sind vorzugsweise an Balken oder Ringen angeordnet, wobei die Balken um ihre Längsachse verschwenkbar angeordnet sein können, sodass ein optimaler Auftreffwinkel der Flüssigkeit auf der Werkstückoberfläche eingestellt werden kann.The liquid jet nozzles are preferably on bars or rings arranged, wherein the beams arranged pivotable about its longitudinal axis so that an optimal angle of impact of the liquid can be adjusted on the workpiece surface.

Nachfolgend wird anhand der Zeichnung das Prinzip erfindungsgemäßer Vorrichtungen im Vergleich zu einer Vorrichtung nach dem Stand der Technik erläutert.Hereinafter, the principle according to the invention with reference to the drawing Devices compared to a device according to the prior Technology explained.

Es zeigen:

Fig. 1
eine schematische Vorderansicht einer Entzunderungsvorrichtung nach dem Stand der Technik;
Fig. 2
eine Seitenansicht einer ersten Ausführungsform einer Entzunderungsvorrichtung;
Fig. 3
eine Seitenansicht einer zweiten Ausführungsform einer Entzunderungsvorrichtung.
Show it:
Fig. 1
a schematic front view of a descaling device according to the prior art;
Fig. 2
a side view of a first embodiment of a descaling device;
Fig. 3
a side view of a second embodiment of a descaling device.

Fig. 1 zeigt eine Entzunderungsvorrichtung 10 nach dem Stand der Technik mit insgesamt vier ringförmig um ein zu entzunderndes Werkstück 11 herum angeordneten Balken 12 bis 15 mit Flüssigkeitsstrahldüsen 16, die alle in einer Ebene und derart angeordnet und angesteuert sind, dass das Werkstück 11 beim Hindurchbewegen durch die ringförmig angeordneten Flüssigkeitsstrahldüsen 16 allseitig bearbeitet wird. Nachdem das Werkstück 11 über seine gesamte Länge entzundert worden ist, wird eine die Flüssigkeitsstrahldüsen 16 versorgende, hier nicht dargestellte Flüssigkeitspumpe bzw. mehrere solche Flüssigkeitspumpen in Leerlaufbetrieb umgeschaltet, bis das nächste Werkstück eintrifft. Diese Leerlaufzeiten erhöhen die Betriebskosten der Vorrichtung. Außerdem ist bei der Vorrichtung 10 gemäß dem Stand der Technik die erforderliche Pumpenleistung sehr hoch, da der gesamte erforderliche Volumenstrom der Flüssigkeit gleichzeitig zur Verfügung gestellt werden muss.Fig. 1 shows a descaling device 10 according to the prior Technique with a total of four rings around a workpiece to be descaled 11 arranged around bars 12 to 15 with liquid jet nozzles 16, all in one plane and arranged and driven are that the workpiece 11 when passing through the annularly arranged liquid jet nozzles 16 machined on all sides becomes. After the workpiece 11 descaled over its entire length is a supplying the liquid jet nozzles 16, not shown here liquid pump or more such Fluid pumps switched to idle mode until the next Workpiece arrives. These idle times increase the operating costs of the Contraption. In addition, in the device 10 according to the prior Technique the required pump power very high, since the entire required volume flow of liquid at the same time must be made.

Wird die Vorrichtung 10 jedoch erfindungsgemäß so ausgestaltet, dass das Werkstück 11 in beiden Richtungen durch die Flüssigkeitsstrahldüsen 16 hindurch bewegbar ist und bei jedem Passieren der Flüssigkeitsstrahldüsen 16 nur ein Teil der Düsen 16 aktiv ist, so kann der Gesamtvolumenstrom auf mehrere Teilvolumenströme aufgeteilt werden, die zeitlich versetzt zur Verfügung gestellt werden müssen, sodass nun Pumpen geringerer Leistung oder in geringerer Anzahl eingesetzt werden können. However, if the device 10 according to the invention is designed so that the workpiece 11 in both directions through the liquid jet nozzles 16 is movable therethrough and with each passing of the liquid jet nozzles 16 only part of the nozzles 16 is active, so can the Total volume flow can be divided into several partial volume flows, which must be made available at a later time, so that now pumps of lower power or used in smaller numbers can be.

Im Gegensatz zur Vorrichtung 10 nach Fig. 1 weist die aus dem Stand der Technik bekannte Entzunderungsvorrichtung 20 nach Fig. 2, die hier in der Seitenansicht dargestellt ist, zwei voneinander beabstandete Stellen 21 und 22 auf, an denen Flüssigkeitsstrahldüsen 23 zur Entzunderung der Oberfläche des Werkstücks 11 angeordnet sind. Beim Hindurchbewegen des Werkstücks 11 in Pfeilrichtung 24 wird die Oberfläche des Werkstücks 11 zunächst auf der Unterseite und auf der Vorderseite entzundert und anschließend an der Stelle 22 an der Ober- und auf der Rückseite. Die beiden Stellen 21 und 22 der Entzunderung sind dabei um einen Abstand D voneinander beabstandet, der größer ist als die Länge L des Werkstücks 11. Dies bedeutet, dass der Gesamtvolumenstrom zur Entzunderung der Oberfläche des Werkstücks 11 auf zwei Stellen aufgeteilt ist, wobei jeweils nur an einer Stelle 21, 22 ein Volumenstrom benötigt wird, während Flüssigkeitsstrahldüsen 23 der anderen Stelle nicht aktiv sind. Dies ermöglicht es, Flüssigkeitspumpen geringerer Leistung oder in geringerer Anzahl zu verwenden, als dies bei der Vorrichtung 10 nach Fig. 1 möglich ist.In contrast to the device 10 according to FIG. 1, the state of the art known in the art descaling device 20 of FIG. 2, the here shown in side view, two spaced apart Make 21 and 22, at which liquid jet nozzles 23 for descaling the surface of the workpiece 11 are arranged. At the Passing the workpiece 11 in the direction of arrow 24, the surface of the workpiece 11 first on the bottom and on the front descaled and then at the point 22 at the top and on the back side. The two points 21 and 22 of descaling are thereby spaced by a distance D from each other, which is greater than the length L of the workpiece 11. This means that the total volume flow for descaling the surface of the workpiece 11 two places is divided, wherein in each case only at one point 21, 22 a Volume flow is needed, while liquid jet nozzles 23 of the other body are not active. This allows fluid pumps to use less power or less than this in the device 10 of FIG. 1 is possible.

Fig. 3 zeigt eine Entzunderungsvorrichtung 30 mit zwei mit Flüssigkeitsstrahldüsen 31 versehenen Balken 32 und 33, die eine Entzunderung der Ober- und der Unterseite eines Werkstücks 11 ermöglichen. Die Balken 32 und 33 sind um einen Abstand D in Transportrichtung 34 des Werkstücks 11 voneinander beabstandet, der größer ist als die Länge L des Werkstücks 11. Auch hier ist also eine Aufteilung des Gesamtvolumenstroms auf Teilvolumenströme möglich, die jeweils zeitversetzt benötigt werden. Bei einer erfindungsgemäßen Entzunderungsvorrichtung sind die Balken 32 und 33 an derselben Stelle angeordnet. Die Balken 32 und 33 sind um ihre Längsachse 35, 36 verschwenkbar angeordnet, sodass der Auftreffwinkel der Flüssigkeit auf der Oberfläche des Werkstücks 11 einstellbar ist.Fig. 3 shows a descaling device 30 with two liquid jet nozzles 31 provided bars 32 and 33, a descaling the top and the bottom of a workpiece 11 allow. The Beams 32 and 33 are spaced by a distance D in the transport direction 34 of FIG Workpiece 11 spaced apart, which is greater than the length L of the workpiece 11. Here, too, is a breakdown of the total volume flow on partial volume flows possible, each time-delayed needed. In a descaling device according to the invention the bars 32 and 33 are arranged in the same place. The beams 32 and 33 are pivotable about their longitudinal axis 35, 36 arranged so that the impact angle of the liquid on the surface of the workpiece 11 is adjustable.

Claims (4)

  1. Device for hydromechanical descaling with several liquid jet nozzles (23, 31) past which the workpiece (11) to be descaled is moved, and with at least liquid pump, characterised in that the liquid jet nozzles are arranged at one point and in that the device exhibits means for moving the workpiece (11) several times past the liquid jet nozzles, wherein only some of the liquid jet nozzles are active each time.
  2. Device according to Claim 1, characterised in that liquid jet nozzles (23, 31) are arranged or activated so that descaling of the workpiece (11) on all sides in succession is possible.
  3. Device according to one of Claims 1 or 2, characterised in that the liquid jet nozzles (23, 31) are arranged on beams (32, 33) or rings.
  4. Device according to Claim 3, characterised in that the beams (32, 33) are arranged so that they can be swivelled about their longitudinal axis (35, 36).
EP00123086A 2000-01-19 2000-10-25 Device for hydromechanical descaling Expired - Lifetime EP1118396B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20000822U DE20000822U1 (en) 2000-01-19 2000-01-19 Device for hydromechanical descaling
DE20000822U 2000-01-19

Publications (3)

Publication Number Publication Date
EP1118396A2 EP1118396A2 (en) 2001-07-25
EP1118396A3 EP1118396A3 (en) 2003-11-26
EP1118396B1 true EP1118396B1 (en) 2005-08-31

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ID=7936063

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EP00123086A Expired - Lifetime EP1118396B1 (en) 2000-01-19 2000-10-25 Device for hydromechanical descaling

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EP (1) EP1118396B1 (en)
AT (1) ATE303212T1 (en)
DE (1) DE20000822U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014009142U1 (en) 2013-12-16 2014-12-11 Gregor Przybylla Device for descaling forgings consisting of iron or steel alloys or non-ferrous materials

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3004240A1 (en) * 1980-02-06 1981-08-13 Schloemann-Siemag AG, 4000 Düsseldorf Ingot cleaning and descaling equipment - has sPray nozzle beams in parallel pairs adjustable in vertical planes
US5661884A (en) * 1996-02-20 1997-09-02 Tippins Incorporated Offset high-pressure water descaling system
CN1087665C (en) * 1996-03-04 2002-07-17 三菱重工业株式会社 Hot-rolling arrangement

Also Published As

Publication number Publication date
ATE303212T1 (en) 2005-09-15
EP1118396A3 (en) 2003-11-26
DE20000822U1 (en) 2000-03-09
EP1118396A2 (en) 2001-07-25

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