EP0250355A1 - Method of manufacturing a rotationally symmetrical hollow body - Google Patents

Method of manufacturing a rotationally symmetrical hollow body Download PDF

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Publication number
EP0250355A1
EP0250355A1 EP87730013A EP87730013A EP0250355A1 EP 0250355 A1 EP0250355 A1 EP 0250355A1 EP 87730013 A EP87730013 A EP 87730013A EP 87730013 A EP87730013 A EP 87730013A EP 0250355 A1 EP0250355 A1 EP 0250355A1
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EP
European Patent Office
Prior art keywords
mandrel
hollow body
collecting surface
movement
produced
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.)
Withdrawn
Application number
EP87730013A
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German (de)
French (fr)
Inventor
Wolfgang Prof.Dr.-Ing. Reichelt
Peter Dr.-Ing. Voss-Spilker
Karl-Heinz Ing. Häusler
Horst Ing. Stinnertz
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.)
Vodafone GmbH
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Mannesmann AG
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Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0250355A1 publication Critical patent/EP0250355A1/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D23/00Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/003Moulding by spraying metal on a surface
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/123Spraying molten metal
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/14Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying for coating elongate material
    • C23C4/16Wires; Tubes
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18After-treatment
    • C23C4/185Separation of the coating from the substrate

Definitions

  • the invention relates to a method for producing rotationally symmetrical hollow bodies, in particular pipes or tube blanks, by spraying a atomized melt of a metal or an alloy onto a cylindrical collecting surface, between which and the spray mist a relative movement in the circumferential direction of the hollow body to be produced is generated and the sprayed metal continuously detaches from the cylindrical collecting surface.
  • a round mandrel that rotates about its longitudinal axis and is supported at both ends has been used as the collecting surface when a tube is to be produced by spraying.
  • the mandrel must have at least the length of the hollow body to be produced. If the spray jet is not as wide as the length of the finished hollow body, the mandrel must be moved in the longitudinal direction in addition to its rotational movement relative to the spray head. The distance by which the mandrel is moved in the longitudinal direction corresponds to the length of the finished hollow body. If several spray heads are used, the length of the longitudinal movement of the mandrel depends on the distance between the spray heads.
  • the hollow body produced by spraying on the mandrel as a collecting surface which can currently be up to 8 meters long, must be detached from the more than 8 meter long mandrel after completion.
  • a further disadvantage is that an at least as long mandrel must be used when producing a long hollow body. This mandrel must be preheated in its entire length before each spraying operation, which requires a corresponding device and also means high energy consumption.
  • the object of the invention is to propose a method which avoids the disadvantages of the known procedure.
  • This new method according to the invention consists in that - starting from the method mentioned at the beginning - the sprayed metal or alloy is continuously detached from the cylindrical collecting surface.
  • the invention is based on the idea that it is possible to produce hollow bodies of practically unlimited length and in an economical manner if a continuous mode of operation is used.
  • the continuous mode of operation has not been considered so far because the difficulties encountered - namely the continuous detachment of the workpiece from the support - were considered insurmountable.
  • the method can be carried out in various ways.
  • the devices required for this differ accordingly.
  • the device shown in FIG. 1 has a crucible 2 with molten metal 1 or an alloy, from which the metal or the alloy is sprayed onto a collecting surface 8 with the aid of a nebulizing system consisting of a nozzle 4 and an annular gas supply 3.
  • the collecting surface 8 is a horizontally arranged, cantilevered round mandrel, which is set in rotation by a rotary drive (not shown) about its longitudinal axis.
  • the hollow body 6 can be removed from the mandrel 8, it is, as illustrated at B, injured in an oscillating movement running in its longitudinal direction.
  • the device required for this which, like the rotary drive, is not shown in the drawing, is located on the section of the mandrel 8 that runs to the right (in the figure).
  • the oscillation device provides not only for the detachment of the hollow body 6 produced by spraying from the mandrel 8, but also for a transport movement in direction A. This is achieved in that the part of the oscillation movement directed in direction A is carried out at a higher speed than that in the opposite direction.
  • the process is carried out under protective gas in a container 9.
  • the hollow body 6 running from the conical (not shown) tapered free end 8a of the mandrel 8 passes through a gas seal indicated at 7, which prevents oxygen from penetrating into the interior of the housing prevented.
  • the material that does not deposit on the mandrel but falls into the lower part of the housing is carried away by a screw conveyor 10.
  • the finished workpiece 6, which becomes longer and longer as the manufacturing process progresses, is supported in the area leading to the left on a roller table (not shown) which also allows the workpiece to be rotated in the circumferential direction.
  • the collecting surface namely the mandrel
  • the hollow-body-shaped workpiece is detached and transported away by oscillating movements which are given to the mandrel or by means of an abrasion device.
  • the mandrel can also have a position deviating from the horizontal.
  • the mandrel can be inclined in the discharge direction if the peeling and discharge effect is thereby increased or improved. It is also conceivable that Arrange the mandrel vertically and remove the finished workpiece downwards. Such a device is shown in Fig. 2. The same parts are numbered the same.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Powder Metallurgy (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Physical Vapour Deposition (AREA)
  • Forging (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zum Herstellen von rotationssymmetrischen Hohlkörpern, insbesondere von Rohren oder Rohrluppen, durch Aufsprühen einer vernebelten Schmelze eines Metalles oder einer Legierung auf eine zylindrische Auffangfläche, zwischen der und dem Sprühnebel eine Relativbewegung in Umfangsrichtung des herzustellenden Hohlkörpers erzeugt wird. Um die Arbeitsweise zu vereinfachen, und insbesondere auch Hohlkörper mit größeren Längen herstellen zu können, wird erfindungsgemäß vorgeschlagen, daß das aufgesprühte Metall kontinuierlich von der zylindrischen Auffangfläche abgelöst wird.The invention relates to a method for producing rotationally symmetrical hollow bodies, in particular tubes or tube blanks, by spraying a atomized melt of a metal or an alloy onto a cylindrical collecting surface, between which and the spray mist a relative movement in the circumferential direction of the hollow body to be produced is generated. In order to simplify the procedure, and in particular to be able to produce hollow bodies with greater lengths, it is proposed according to the invention that the sprayed metal is continuously detached from the cylindrical collecting surface.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von rotations­symmetrischen Hohlkörpern, insbesondere Rohren oder Rohrluppen, durch Aufsprühen einer vernebelten Schmelze eines Metalls oder einer Legierung auf eine zylindrische Auffangfläche, zwischen der und dem Sprühnebel eine Relativbewgung in Umfangsrichtung des herzustellenden Hohlkörpers erzeugt wird und das aufgesprühte Metall kontinuierlich von der zylindrischen Auffangfläche ablöst.The invention relates to a method for producing rotationally symmetrical hollow bodies, in particular pipes or tube blanks, by spraying a atomized melt of a metal or an alloy onto a cylindrical collecting surface, between which and the spray mist a relative movement in the circumferential direction of the hollow body to be produced is generated and the sprayed metal continuously detaches from the cylindrical collecting surface.

Es ist bekannt, Hohlkörper, insbesondere Rohre oder Rohrluppen, durch Aufsprühen einer vernebelten Schmelze eines Metalls oder einer Le­gierung auf eine zylindrische Auffangfläche zu erzeugen, zwischen der und dem Sprühnebel eine Relativbewegung im Umfangsrichtung des her­zustellenden Hohlkörpers erzeugt wird.It is known to produce hollow bodies, in particular pipes or tube blanks, by spraying a atomized melt of a metal or an alloy onto a cylindrical collecting surface, between which and the spray mist a relative movement in the circumferential direction of the hollow body to be produced is generated.

So verwendet man bisher als Auffangfläche einen runden, um seine Längsachse rotierenden, beiderends gelagerten Dorn, wenn ein Rohr im Sprühverfahren hergestellt werden soll. Der Dorn muß hierbei minde­stens die Länge des zu erzeugenden Hohlkörpers aufweisen. Falls der Sprühstrahl nicht so breit ist, wie die Länge des fertigen Hohlkör­pers beträgt, muß der Dorn zusätzlich zu seiner Rotationsbewegung relativ zum Sprühkopf in Längsrichtung bewegt werden. Die Strecke, um die der Dorn in Längsrichtung bewegt wird, entspricht aber der Länge des fertigen Hohlkörpers. Werden mehrere Sprühköpfe verwendet, rich­tet sich die Länge der Längsbewegung des Dorns nach dem Abstand zwi­schen des Sprühköpfen.So far, a round mandrel that rotates about its longitudinal axis and is supported at both ends has been used as the collecting surface when a tube is to be produced by spraying. The mandrel must have at least the length of the hollow body to be produced. If the spray jet is not as wide as the length of the finished hollow body, the mandrel must be moved in the longitudinal direction in addition to its rotational movement relative to the spray head. The distance by which the mandrel is moved in the longitudinal direction corresponds to the length of the finished hollow body. If several spray heads are used, the length of the longitudinal movement of the mandrel depends on the distance between the spray heads.

Der durch Sprühen auf den Dorn als Auffangfläche hergestellte Hohl­körper, der gegenwärtig bis zu 8 Meter lang sein kann, muß nach Fertigstellung von dem mehr als 8 Meter langen Dorn gelöst werden.The hollow body produced by spraying on the mandrel as a collecting surface, which can currently be up to 8 meters long, must be detached from the more than 8 meter long mandrel after completion.

Dies ist nur mit Hilfe einer aufwendigen Löseeinrichtung möglich. Nachteilig ist ferner, daß bei Herstellung eines langen Hohlkörpers ein mindestens ebenso langer Dorn verwendet werden muß. Dieser Dorn muß vor jedem Sprühvorgang in seiner gesamten Länge vorgewärmt wer­den, was eine entsprechende Vorrichtung erfordert und zudem einen ho­hen Energieverbrauch bedeutet.This is only possible with the help of a complex release device. A further disadvantage is that an at least as long mandrel must be used when producing a long hollow body. This mandrel must be preheated in its entire length before each spraying operation, which requires a corresponding device and also means high energy consumption.

Ein weiterer Nachteil der bekannten Arbeitsweise ist, daß ein auf­wendiger Dornumlauf erforderlich ist, weil vermieden werden muß, daß die Dorne ihre Geradheit verlieren. Schließlich können mit dem bekannten Verfahren nur Hohlkörper einer relativ begrenzten Maximal­länge hergestellt werden, weil die Verwendung sehr langer Dorne den technischen Aufwand unverhältnismäßig vergrößert.Another disadvantage of the known method of operation is that a complex mandrel circulation is necessary because it must be avoided that the mandrels lose their straightness. Finally, only hollow bodies of a relatively limited maximum length can be produced with the known method, because the use of very long mandrels increases the technical outlay disproportionately.

Aufgabe der Erfindung ist es, ein Verfahren vorzuschlagen, das die Nachteile der bekannten Arbeitsweise vermeidet. Dieses neue Verfah­ren besteht nach der Erfindung darin, daß - ausgehend von dem ein­gangs genannten Verfahren - das aufgesprühte Metall bzw. die Legie­rung kontinuierlich von der zylindrischen Auffangfläche abgelöst wird.The object of the invention is to propose a method which avoids the disadvantages of the known procedure. This new method according to the invention consists in that - starting from the method mentioned at the beginning - the sprayed metal or alloy is continuously detached from the cylindrical collecting surface.

Der Erfindung liegt der Gedanke zugrunde, daß es möglich ist, Hohl­körper von praktisch unbegrenzter Länge und auf wirtschaftliche Weise herzustellen, wenn man eine kontinuierliche Arbeitsweise anwendet. Die kontinuierliche Arbeitsweise wurde bisher nicht in Betracht ge­zogen, weil man die dabei auftretenden Schwierigkeiten - nämlich das kontinuierliche Ablösen des Werkstücks von der Unterlage - für unüberwindbar hielt.The invention is based on the idea that it is possible to produce hollow bodies of practically unlimited length and in an economical manner if a continuous mode of operation is used. The continuous mode of operation has not been considered so far because the difficulties encountered - namely the continuous detachment of the workpiece from the support - were considered insurmountable.

Es hat sich nun gezeigt, daß eine (quasi) kontinuierliche Ablösung von der Auffangfläche stattfindet, wenn dieser, gemäß der Erfindung, eine in Achsrichtung des in der Herstellung befindlichen Hohlkörpers wirkende Oszillationsbewegung erteilt wird. Auf diese Weise wird ver­hindert, daß sich das Werkstück auf der Auffangfläche festsetzt.It has now been shown that (quasi) continuous detachment from the collecting surface takes place if, according to the invention, this is given an oscillating movement acting in the axial direction of the hollow body being manufactured. This prevents the workpiece from getting stuck on the collecting surface.

Gleichzeitig findet eine Transportbewegung in Längsrichtung statt. Die Oszillation der Auffangfläche stört nicht den im Sprühverfahren erfolgenden Aufbau des Hohlkörpers, insbesondere nich den Zusammen­halt des bereits fertigen Werkstückteils mit dem in der Herstellung befindlichen. Dies ist nach der der Erfindung zugrundeliegenden Er­kenntnis möglich, weil die Metalltröpfchen ihren Flüssigkeitscharak­ter beim Auftreten auf die Auffangfläche verlieren und sich verfe­stigen. Das angelagerte verfestigte Material löst sich unter der Wirkung der Oszillation von der Auffangfläche.At the same time, a transport movement takes place in the longitudinal direction. The oscillation of the collecting surface does not interfere with the structure of the hollow body which takes place in the spraying process, in particular not with the cohesion of the already finished workpiece part with that which is being produced. This is possible according to the knowledge on which the invention is based, because the metal droplets lose their liquid character when they occur on the collecting surface and solidify. The attached solidified material loosens from the collecting surface under the effect of the oscillation.

Ausgehend von der grundlegenden Erkenntnis, wie sie vorstehend er­läutert wurde, kann das Verfahren auf verschiedene Weise durchgeführt werden. Ensprechend unterscheiden sich die dafür benötigten Vor­richtungen.Based on the basic knowledge, as explained above, the method can be carried out in various ways. The devices required for this differ accordingly.

Die Erfindung wird anhand der Abbildungen näher erläutert. Es zei­gen:

  • Fig. 1 eine schematische Darstellung einer zur Durchführung des erfindungsgemäßen Verfahrens dienenden Vorrichtung,
  • Fig. 2 die Vorrichtung nach Fig. 1 mit senkrecht angeordnetem Dorn.
The invention is explained in more detail with the aid of the figures. Show it:
  • 1 shows a schematic representation of a device used to carry out the method according to the invention,
  • Fig. 2 shows the device of FIG. 1 with a vertically arranged mandrel.

Die in Fig. 1 dargestellte Vorrichtung weist einen Tiegel 2 mit geschmolzenem Metall 1 oder einer Legierung auf, aus dem das Metall oder die Legierung mit Hilfe eines aus einer Düse 4 und einer ring­förmigen Gaszuführung 3 bestehenden Vernebelungssystems auf eine Auffangfläche 8 aufgesprüht wird. Die Auffangfläche 8 ist ein waage­recht angeordneter, fliegend gelagerter runder Dorn, der von einem (nicht gezeigten) Drehantrieb in rotierende Bewegung um seine Längs­achse versetzt wird. Der Sprühnebel 5, der aus dem Vernebelungssy­ stem, austritt, trifft im Bereich des Sprühkegels auf den Dorn 8 auf und bildet dort einen Hohlkörper 6, der den sich drehenden Dorn 8 umgibt. Da der durch relativ kalte Gasstrahlen vernebelten Schmelze im Fluge so viel Wärme entzogen wird, daß die Kondensation bei der Ablagerung stattfindet, bildet sich ein festes Werkstück, weil die Temperatur der Auffangfläche und damit auch des sich darüber aufschichtenden Materials unterhalb des Schmelzpunktes des vernebelten Materials gehalten wird.The device shown in FIG. 1 has a crucible 2 with molten metal 1 or an alloy, from which the metal or the alloy is sprayed onto a collecting surface 8 with the aid of a nebulizing system consisting of a nozzle 4 and an annular gas supply 3. The collecting surface 8 is a horizontally arranged, cantilevered round mandrel, which is set in rotation by a rotary drive (not shown) about its longitudinal axis. The spray 5, which from the Nebebelungssy stem, emerges, strikes the mandrel 8 in the region of the spray cone and forms a hollow body 6 there, which surrounds the rotating mandrel 8. Since the melt atomized by relatively cold gas jets in flight so much heat is removed that the condensation takes place during the deposition, a solid workpiece is formed because the temperature of the collecting surface and thus of the material piled up above it is kept below the melting point of the atomized material becomes.

Damit der Hohlkörper 6 sich von dem Dorn 8 abnehmen läßt, wird er, wie bei B veranschaulicht, in eine in seiner Längsrichtung verlaufende Oszillationsbewegung verletzt. Die hierzu erforderliche Vorrichtung, die, ebenso wie der Drehantrieb, in der Zeichnung nicht dargestellt ist, befindet sich am (in der Figur) nach rechts verlaufenden Abschnitt des Dornes 8.So that the hollow body 6 can be removed from the mandrel 8, it is, as illustrated at B, injured in an oscillating movement running in its longitudinal direction. The device required for this, which, like the rotary drive, is not shown in the drawing, is located on the section of the mandrel 8 that runs to the right (in the figure).

Die Oszillationsvorrichtung sorgt nicht nur für das Ablösen des durch Sprühen erzeugten Hohlkörpers 6 vom Dorn 8, sondern auch für eine Transportbewegung in Richtung A. Dies wird dadurch erreicht, daß man den in Richtung A gerichteten Teil der Oszillationsbewegung mit größerer Geschwindigkeit erfolgen läßt, als den in der dazu entgegengesetzten Richtung.The oscillation device provides not only for the detachment of the hollow body 6 produced by spraying from the mandrel 8, but also for a transport movement in direction A. This is achieved in that the part of the oscillation movement directed in direction A is carried out at a higher speed than that in the opposite direction.

Es ist aber auch denkbar, wie in der Fig. 1 dargestell, eine Abzieh­vorrichtung 11 für das erstarrte Rohrende vorzusehen, die mit glei­cher Drehzahl und Drehrichtungwie der Dorn 8 rotiert und das Rohr­ende mit einer Zange 12 erfaßt und in Richtung A zielt. Selbstver­ständlich kann statt der Zange ein herkömmlicher Rollentreibapparat Verwendung finden.However, it is also conceivable, as shown in FIG. 1, to provide a pulling device 11 for the solidified pipe end, which rotates at the same speed and direction of rotation as the mandrel 8 and grips the pipe end with a pair of pliers 12 and aims in the direction A. Of course, a conventional roller driver can be used instead of the pliers.

Um die Oxidation des vernebelten Metalls/Legierung zu vermeiden, wird der Arbeitsvorgang unter Schutzgas in einem Behälter 9 durchgeführt. Der vom konisch (nicht dargestellten) verjüngten freien Ende 8a des Dorns 8 ablaufende Hohlkörper 6 passiert eine bei 7 angedeutete Gas­dichtung, die das Eindringen von Sauerstoff in das Gehäuseinnere verhindert. Das Material, das sich nicht auf dem Dorn ablagert, son­dern in den unteren Teil des Gehäuses fällt, wird von einem Schnek­kenförderer 10 abtransportiert.In order to avoid the oxidation of the atomized metal / alloy, the process is carried out under protective gas in a container 9. The hollow body 6 running from the conical (not shown) tapered free end 8a of the mandrel 8 passes through a gas seal indicated at 7, which prevents oxygen from penetrating into the interior of the housing prevented. The material that does not deposit on the mandrel but falls into the lower part of the housing is carried away by a screw conveyor 10.

Das fertige Werkstück 6, das mit Fortschreiten des Herstellungsvor­gangs ständig länger wird, wird in dem nach links führenden Bereich auf einem (nicht gezeigten) Rollgang abgestützt, der auch die Drehung des Werkstücks in Umfangsrichtung zuläßt.The finished workpiece 6, which becomes longer and longer as the manufacturing process progresses, is supported in the area leading to the left on a roller table (not shown) which also allows the workpiece to be rotated in the circumferential direction.

Es kann zweckmäßig sein, zu Beginn des Sprühvorgangs zunächst ein Hohlkörper-Anfangsstück herzustellen, was zwar bei rotierendem Dorn aber ohne Oszillationsbewegung des Dorns erfolgt. Ist das Anfangs­stück mit der erforderlichen Wandstärke durch Sprühen fertiggestellt, wird es durch Einschalten des Oszillationsantriebes vom Dorn gelöst und in Austragrichtung - Pfeil A - transportiert, bis das Ende des Anfangsstücks Platz für die Herstellung des unmittelbar anschließen­den Hohlkörperstücks gemacht hat. Dann wird - unter Abschaltung des Oszillationsantriebes oder seiner Drosselung - der nächste Abschnitt durch Sprühen hergestellt.It may be expedient to first produce a hollow body starting piece at the beginning of the spraying process, which takes place with the mandrel rotating but without the mandrel oscillating. If the starting piece with the required wall thickness is finished by spraying, it is detached from the mandrel by switching on the oscillation drive and transported in the discharge direction - arrow A - until the end of the starting piece has made room for the production of the immediately adjacent hollow body piece. Then - with the oscillation drive switched off or its throttling - the next section is produced by spraying.

Ansatt die Auffangfläche, nämlich den Dorn, während der Herstellung des Hohlkörpers rotieren zu lassen, ist es auch möglich, den Dorn mit einer oder mehreren auf einem Ring verteilten, ggfs. rotierenden Düse zu umgeben, aus der bzw. aus denen die flüssige Schmelze in vernebeltem Zustand aufgebracht wird. Das Ablösen und der Abtransport des hohlkörperförmigen Werkstücks erfolgt auch in diesem Fall durch oszillierende Bewegungen, die dem Dorn aufgegeben werden oder mit Hilfe einer Abriebvorrichtung.Instead of allowing the collecting surface, namely the mandrel, to rotate during the production of the hollow body, it is also possible to surround the mandrel with one or more, possibly rotating, nozzles distributed on a ring, from which or from which the liquid melt flows nebulized state is applied. In this case, too, the hollow-body-shaped workpiece is detached and transported away by oscillating movements which are given to the mandrel or by means of an abrasion device.

Wenn aus Düsenringen oder aus um den Dorn rotierenden Düsen das ver­nebelte Metall aufgebracht wird, kann der Dorn auch eine von der Waagerechten abweichende Lage haben. Zum Beispiel kann der Dorn in der Austragrichtung geneigt sein, wenn dadurch die Ablöse- und Aus­tragwirkung verstärkt oder verbessert wird. Es ist auch denkbar, den Dorn senkrecht anzuordnen und das fertige Werkstück nach unten abzu­transportieren. Eine derartige Vorrichtung ist in Fig. 2 dargestellt. Gleiche Teile sind hierbei gleich beziffert.If the atomized metal is applied from nozzle rings or from nozzles rotating around the mandrel, the mandrel can also have a position deviating from the horizontal. For example, the mandrel can be inclined in the discharge direction if the peeling and discharge effect is thereby increased or improved. It is also conceivable that Arrange the mandrel vertically and remove the finished workpiece downwards. Such a device is shown in Fig. 2. The same parts are numbered the same.

Es ist auch möglich, das fertige Rohr in einem Bogen geführt in die horizontale Lage zurückzufahren.It is also possible to return the finished pipe to the horizontal position in an arc.

Claims (14)

1. Verfahren zum Herstellen von rotationssymmetrischen Hohlkörpern, insbesondere von Rohren oder Rohrluppen, durch Aufsprühen einer vernebelten Schmelze eines Metalls oder einer Legierung auf eine zylindrische Auffangfläche, zwischen der und dem Sprühnebel eine Relativbewegung in Umfangsrichtung des herzustellenden Hohlkör­pers erzeugt wird,
dadurch gekennzeichnet,
daß das aufgesprühte Metall kontinuierlich von der zylindrischen Auffangfläche abgelöst wird.
1. A method for producing rotationally symmetrical hollow bodies, in particular tubes or pipe blanks, by spraying a atomized melt of a metal or an alloy onto a cylindrical collecting surface, between which and the spray mist a relative movement in the circumferential direction of the hollow body to be produced is generated,
characterized,
that the sprayed metal is continuously detached from the cylindrical collecting surface.
2. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
daß der Auffangfläche eine in Achsrichtung des in der Herstel­lung befindlichen Hohlkörpers wirkende Oszillationsbewegung er­teilt wird.
2. The method according to claim 1,
characterized,
that the collecting surface is given an oscillating movement acting in the axial direction of the hollow body being manufactured.
3. Verfahren nach Anspruch 2,
dadurch gekennzeichnet,
daß zum Ablösen des Hohlkörpers der in Richtung zur Entnahme­seite der Auffangfläche gerichtete Teil der Oszillationsbewe­gung mit kleinerer Energie als der in entgegengesetzter Richtung erfolgende Teil der Oszillationsbewegung erzeugt wird.
3. The method according to claim 2,
characterized,
that to detach the hollow body, the part of the oscillation movement directed towards the removal side of the collecting surface is generated with less energy than the part of the oscillation movement taking place in the opposite direction.
4.Verfahren nach Anspruch 3,
dadurch gekennzeichnet,
daß in der Sprühzone zunächst ohne Oszillation der Auffangflä­che ein Hohlkörper-Anfangsstück erzeugt wird, wonach der Ablö­se- und Abtransportvorgang durch Aufbringen der in Achsrichtung des Hohlkörpes auf das Anfangsstück einwirkenden Oszillations­bewegung herbeigführt und so lange aufrechterhalten wird, bis Raum für die Herstellung eines übergangslos anschließenden wei­teren Hohlkörperstücks geschaffen ist und daß dann dieses wei­tere Stück ohne Oszillationsbewegung der Auffangsfläche herge­stellt wird, wonach die genannten Vorgänge in periodischem Wechsel fortgesetzt werden.
4.The method according to claim 3,
characterized,
that a hollow body initial piece is first produced in the spray zone without oscillation of the collecting surface, after which the detachment and removal process is brought about by applying the oscillating movement acting on the initial piece in the axial direction of the hollow body and is maintained until there is space for the production of another seamlessly subsequent one Hollow body piece is created and that this further piece is then produced without oscillating movement of the collecting surface, after which the processes mentioned are continued in a periodic change.
5. Vorrichtung zur Durchführung des Verfahrens nach den Ansprüchen 1 bis 4,
dadurch gekennzeichnet,
daß die Auffangfläche (8) ein zylindrischer Dorn ist, der nur an einem Ende in einer Halterung befestigt ist.
5. Device for carrying out the method according to claims 1 to 4,
characterized,
that the collecting surface (8) is a cylindrical mandrel, which is fastened at one end in a holder.
6. Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet,
daß die Länge des Dornes (8) der zwei- bis dreifachen Breite der Sprühzone (5) entspricht.
6. The device according to claim 5,
characterized,
that the length of the mandrel (8) corresponds to two to three times the width of the spray zone (5).
7. Vorrichtung nach den Ansprüchen 5 und 6,
dadurch gekennzeichnet,
daß der Dorn (8) zu seinem freien Ende (8a) hin konisch ver­läuft.
7. Device according to claims 5 and 6,
characterized,
that the mandrel (8) is tapered towards its free end (8a).
8. Vorrichtung nach den Ansprüchen 5 bis 7,
dadurch gekennzeichnet,
daß die Oberfläche des Dornes (8) mindestens im Bereich der Sprühzone (5) aus hochwarmfestem Werkstoff, wie Keramik, Stahl, Stahlguß oder dergleichen, besteht.
8. Device according to claims 5 to 7,
characterized,
that the surface of the mandrel (8), at least in the area of the spray zone (5), is made of highly heat-resistant material such as ceramic, steel, cast steel or the like.
9. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß dem Dorn (8) eine Abziehvorrichtung (11) für den erstarrten Hohlkörper (6) zugeordnet ist.
9. The device according to one or more of the preceding claims,
characterized,
that the mandrel (8) is assigned a puller (11) for the solidified hollow body (6).
10. Vorrichtung nach Anspruch 9,
dadurch gekennzeichnet,
daß die Abziehvorrichtung aus in einem ggfs. rotierenden Käfig gelagerten Schrägrollen besteht.
10. The device according to claim 9,
characterized,
that the pulling device consists of inclined rollers, which may be mounted in a rotating cage.
11. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Dorn (8) rotationsfest gehalten und mit einer den Dorn im Abstand umgebenden Düsenring versehen ist.
11. The device according to one or more of the preceding claims,
characterized,
that the mandrel (8) is held in rotation and is provided with a nozzle ring surrounding the mandrel at a distance.
12. Vorrichtung nach Anspruch 11,
dadurch gekennzeichnet,
daß der Düsenring um den Dorn (8) rotierbar gelagert ist.
12. The device according to claim 11,
characterized,
that the nozzle ring is rotatably mounted around the mandrel (8).
13. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Dorn (8) und/oder der Düsenring in einem eine oszillierende Drehbewegung um die Längsachse des Dorns (8) erzeugenden Antrieb verbunden sind.
13. The device according to one or more of the preceding claims,
characterized,
that the mandrel (8) and / or the nozzle ring are connected in a drive producing an oscillating rotary movement about the longitudinal axis of the mandrel (8).
14. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß der Dorn senkrecht angeordnet ist.
14. The device according to one or more of the preceding claims,
characterized,
that the mandrel is arranged vertically.
EP87730013A 1986-05-27 1987-02-05 Method of manufacturing a rotationally symmetrical hollow body Withdrawn EP0250355A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3617833A DE3617833C1 (en) 1986-05-27 1986-05-27 Process for the production of rotationally symmetrical hollow bodies
DE3617833 1986-05-27

Publications (1)

Publication Number Publication Date
EP0250355A1 true EP0250355A1 (en) 1987-12-23

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ID=6301745

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Application Number Title Priority Date Filing Date
EP87730013A Withdrawn EP0250355A1 (en) 1986-05-27 1987-02-05 Method of manufacturing a rotationally symmetrical hollow body

Country Status (4)

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US (1) US4777995A (en)
EP (1) EP0250355A1 (en)
JP (1) JPS62279049A (en)
DE (1) DE3617833C1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299944A2 (en) * 1987-07-14 1989-01-18 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Method of making a multilayered cylinder, and cylinder so obtained
WO1992015721A1 (en) * 1991-03-07 1992-09-17 Osprey Metals Limited Production of spray deposits
AU638676B2 (en) * 1988-06-06 1993-07-08 Osprey Metals Limited Spray deposition of layered composites

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* Cited by examiner, † Cited by third party
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281225A (en) * 1940-02-15 1942-04-28 Bleakley Corp Method of producing molds
DE810223C (en) * 1949-04-14 1951-08-06 Deutsche Edelstahlwerke Ag Process for the production of metallic moldings
US2639490A (en) * 1948-08-12 1953-05-26 Joseph B Brennan Formation of metal strip under controlled pressures
FR1120320A (en) * 1954-03-06 1956-07-04 Jenaer Glaswerk Schott & Gen Process and device for the continuous manufacture of tubes of glass or of other materials which can be fluidized under the effect of heat
US3409068A (en) * 1965-07-01 1968-11-05 Phelps Dodge Copper Prod Method of continuously casting tubes using a rotating mandrel
DE2002358A1 (en) * 1969-01-20 1970-08-27 Ceskoslovenska Akademie Ved Process for the production of pipes by centrifugal casting
GB1599392A (en) * 1978-05-31 1981-09-30 Osprey Metals Ltd Method and apparatus for producing workable spray deposits
FR2499901A1 (en) * 1981-02-13 1982-08-20 Thoratec Lab Corp APPARATUS AND METHOD FOR MANUFACTURING MULTILAYER TUBE
EP0188994A1 (en) * 1984-12-21 1986-07-30 MANNESMANN Aktiengesellschaft Process and device for producing a metallic block

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2281225A (en) * 1940-02-15 1942-04-28 Bleakley Corp Method of producing molds
US2639490A (en) * 1948-08-12 1953-05-26 Joseph B Brennan Formation of metal strip under controlled pressures
DE810223C (en) * 1949-04-14 1951-08-06 Deutsche Edelstahlwerke Ag Process for the production of metallic moldings
FR1120320A (en) * 1954-03-06 1956-07-04 Jenaer Glaswerk Schott & Gen Process and device for the continuous manufacture of tubes of glass or of other materials which can be fluidized under the effect of heat
US3409068A (en) * 1965-07-01 1968-11-05 Phelps Dodge Copper Prod Method of continuously casting tubes using a rotating mandrel
DE2002358A1 (en) * 1969-01-20 1970-08-27 Ceskoslovenska Akademie Ved Process for the production of pipes by centrifugal casting
GB1599392A (en) * 1978-05-31 1981-09-30 Osprey Metals Ltd Method and apparatus for producing workable spray deposits
FR2499901A1 (en) * 1981-02-13 1982-08-20 Thoratec Lab Corp APPARATUS AND METHOD FOR MANUFACTURING MULTILAYER TUBE
EP0188994A1 (en) * 1984-12-21 1986-07-30 MANNESMANN Aktiengesellschaft Process and device for producing a metallic block

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299944A2 (en) * 1987-07-14 1989-01-18 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Method of making a multilayered cylinder, and cylinder so obtained
EP0299944A3 (en) * 1987-07-14 1989-12-06 CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif Method of making a multilayered cylinder, and cylinder so obtained
AU638676B2 (en) * 1988-06-06 1993-07-08 Osprey Metals Limited Spray deposition of layered composites
WO1992015721A1 (en) * 1991-03-07 1992-09-17 Osprey Metals Limited Production of spray deposits

Also Published As

Publication number Publication date
US4777995A (en) 1988-10-18
DE3617833C1 (en) 1987-09-03
JPS62279049A (en) 1987-12-03

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