EP0263093B1 - Apparatus for heat-treating a continuously moving metal wire - Google Patents

Apparatus for heat-treating a continuously moving metal wire Download PDF

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Publication number
EP0263093B1
EP0263093B1 EP87890213A EP87890213A EP0263093B1 EP 0263093 B1 EP0263093 B1 EP 0263093B1 EP 87890213 A EP87890213 A EP 87890213A EP 87890213 A EP87890213 A EP 87890213A EP 0263093 B1 EP0263093 B1 EP 0263093B1
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EP
European Patent Office
Prior art keywords
wire
drum
tension roller
axle
tension
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
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EP87890213A
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German (de)
French (fr)
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EP0263093A3 (en
EP0263093A2 (en
Inventor
Gerhard Dipl.-Ing. Dr. Ritter
Klaus Dipl.-Ing. Ritter
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EVG Entwicklungs und Verwertungs GmbH
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EVG Entwicklungs und Verwertungs GmbH
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Publication of EP0263093A2 publication Critical patent/EP0263093A2/en
Publication of EP0263093A3 publication Critical patent/EP0263093A3/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire

Definitions

  • the invention relates to a device for heat treatment, in particular annealing, of a continuously moving metal wire using a driven drum wrapped in wire with several turns in the heat treatment area.
  • Devices of this type enable a relatively long residence time of the wire in the heat treatment zone with a space-saving design.
  • a device of this type known from DE-B-595.364, designed as an annealing furnace
  • the drum is designed conically in such a way that the drum diameter gradually decreases from the point of entry of the wire to its point of discharge. In this way it should be achieved that the windings enclose the drum at the end of the run with play so that there is always a larger free wire length for processing in an intermittently working upsetting press for the production of screw bolts and similar objects.
  • a cause of an interruption in operation can be that the wire gets tangled when it is pulled off a reel.
  • the wire section remaining in the heat treatment zone is heated so long that it is practically annealed and thus becomes unusable, and there is also the risk that the wire, which may contract again in the event of cooling, will become so strong due to the resistance of the rigid drum Stretching is subjected to the fact that it tears. This danger of tearing also exists when a cooling treatment of the wire wound around a rigid drum is interrupted.
  • the invention is therefore first of all concerned with the object of eliminating the risk of the wire breaking in the event of an intentional or forced interruption of operation in a heat treatment device of the type specified in the introduction.
  • the drum wound by the continuously moving wire is assigned a tensioning roller or a group of tensioning rollers, the axial position of which can be changed from a predetermined rest position relative to the axial position of the drum, and that devices for changing the axial position of the tensioning roller or Each tensioning roller of the group is provided with a limited tensioning force in the sense of tensioning the windings of the wire wrapping around the drum and / or each tensioning roller in series.
  • the drum and the tensioning roller or the tensioning roller group form a system wrapped in the wire windings, the scope of which can be changed by changing the axial position of the tensioning roller or each tensioning roller with respect to the axial position of the drum, so that when a certain tension in the Wire allows the wire to be relieved by changing the relative axis positions and thus prevents the wire from tearing.
  • the axis of the tensioning roller or each tensioning roller of a tensioning roller group can be guided in parallel with respect to the axis of the drum.
  • the extent of the system formed by the drum and the tensioning roller or the group of tensioning rollers along the system axis automatically changes in accordance with the stretching or shrinking of the wire during annealing or Cooling can change, which effectively mimics a conical drum of variable conicity and the wire windings on the drum and on or on each tensioning roller fit well, without the risk of the wire tearing when the business is interrupted.
  • the displaceability of the axis of the or each tension roller can also be combined with the pivotability thereof with respect to the drum axis.
  • the drum and the tensioning roller or the group of tensioning rollers can be located in an oven housing which may be filled with protective gas.
  • the furnace housing should have a hood that opens automatically when the device is interrupted, in which the heating device of the furnace is preferably arranged, whereby in the event of an interruption in operation not only prevents the wire from tearing, but also prevents the wire section remaining in the furnace from annealing by allowing it to cool down.
  • the annealing furnace generally designated 1 in FIGS. 1 to 3 has a housing which consists of a base plate 2 and a hood 3 which can be placed thereon by means of handles 4, on the vertical side walls 5 of which the heating devices of the furnace are advantageously mounted.
  • a drum 6 is arranged in the interior of the annealing furnace 1 and is connected in a rotationally fixed manner to a shaft 7 passing through the base plate 2.
  • the shaft 7 carries a drive element, e.g. a pulley 8.
  • a tensioning roller 10 is provided, which is rotatably mounted with stub axles 11 at the free ends of two one-armed levers 12, 13.
  • the other ends of the one-armed lever 12, 13 are attached to a shaft 14.
  • the shaft 14 also passes through the base plate 2 of the annealing furnace and carries at its outer end a one-armed lever 15, at the free end of which the piston rod 16 engages a cylinder-piston arrangement 17.
  • the drum 6 and the tension roller 10 with several turns wrapping wire 18 can be loaded with any tensile force that is selected so that the heat resistance of the wire 18 is not exceeded and it Wire in the event of a sudden cooling is possible to contract without tearing.
  • the furnace hood 3 preferably together with the heating device for the furnace, should be automatically lifted during an interruption in operation, so that the possibility of rapid cooling of the wire windings is created, which can be used because the associated risk of tearing is eliminated according to the invention has been.
  • a wall part 26 is provided on the base plate 2 according to FIG. 3, in which there is an inlet guide 27 for the wire, and a corresponding recess is provided in the hood 3 into which the wall part 26 can engage
  • the outgoing part of the wire lies just above the upper edge of the base plate 2 and can therefore be passed through a simple U-shaped slot in the hood.
  • the stub axles 11 of the tensioning roller are pivotably mounted by means of ball joints 33, etc. one end of the roll (the wire inlet side during annealing or the wire outlet side during cooling) in a stationary bearing pan, which is supported by a bracket 28 fixedly connected to the base plate 2, and the other end in an adjustable bearing pan, which is armed at one end of one Lever 13 is located, the other end is rotatably connected to a shaft 14 passing through the base plate 2.
  • a one-armed lever 15 ′ engages, which has an elongated hole at its free end, into which a driver connected to the piston rod 16 of a cylinder-piston arrangement 17 engages.
  • the axes of the drum and the tensioning roller are parallel to one another at the start of operation, that is to say in the cold state of the wire 18 wrapping around the drum 6 and the tensioning roller 10.
  • the piston-cylinder arrangement 17 then forces such an inclination of the axis of the tensioning roller 10 that the circumferential length of the system drum-tensioning roller increases in the axial direction from the inlet point of the wire to the outlet point thereof and the wire 18 is essentially uniform on the drum and lies against the tension roller.
  • Fig. 6 shows an arrangement of the tension roller 10, in which it can both move and pivot.
  • two coaxial shafts 29, 30 are provided.
  • a one-armed lever 31 is connected to one end of the inner shaft 29 and a one-armed lever 32 is rotatably connected to one end of the outer shaft 30.
  • Each of the one-armed levers 31, 32 carries at its free end a bearing socket, into which one of the stub axles 11 is the instep roller 10 engages with a ball joint 33.
  • the coaxial shafts 29, 30 are spring-loaded by means of a piston-cylinder arrangement analogous to the arrangement 17 in FIG. 1, independently of one another in the sense of tensioning the wire wrapping around the drum 6 and the tensioning roller 10 .
  • the tensioning roller 10 By rotating the two shafts 29 and 30 in the same direction, the tensioning roller 10 is displaced in parallel, and by rotating the outer shaft 30 alone, the tensioning roller 10 is pivoted about the end lying at the top in FIG. 6. By rotating the two shafts 29 and 30 in opposite directions by the same angular amounts, the tensioning roller is pivoted about its axis center. By rotating the two shafts 29 and 30 by unequal angular amounts, the tensioning roller 10 can finally be moved and pivoted in parallel.
  • FIG. 7 A further embodiment of the invention is shown in a schematic top view (with the furnace hood raised) in FIG. 7. 7, a group of six tensioning rollers 10 'is arranged in a star shape around a drum 6. These tensioning rollers 10 'can be mounted displaceably and / or pivotably, as has been described with reference to FIGS. 1 to 3 (displaceable mounting), FIGS. 4 and 5 (pivotable mounting) and from FIG. 6 (displaceable and pivotable mounting) is.
  • FIG. 6 the same reference numerals as in FIGS. 1 to 3 have been used for the tensioning roller arrangement for the sake of simplicity.
  • the wire can be guided alternately over the drum 6 and one of the tensioning rollers 10 'in a largely arbitrary manner.
  • the tensioning rollers can also have only a fraction of the length of the drum, in the example shown about a sixth of this length, each tensioning roller being arranged opposite a certain length of the drum axis and the wire with several turns over the drum and the first tensioning roller, then over the drum and the second tension roller, etc. is guided.
  • the surfaces thereof can have helical grooves 25, as shown in FIG. 8.
  • the device according to the invention is suitable for the heat treatment of wires of largely any cross-sectional shape and in particular also of wires of different metal compositions and according to different required treatment temperatures, especially since the tensioning rollers are automatically adjusted depending on the temperature-dependent change in length of the wire.

Description

Die Erfindung betrifft eine Vorrichtung zum Wärmebehandeln, insbesondere Glühen, eines kontinuierlich fortbewegten Metalldrahtes unter Verwendung einer vom Draht mit mehreren Windungen umschlungenen angetriebenen Trommel im Wärmebehandlungsbereich.The invention relates to a device for heat treatment, in particular annealing, of a continuously moving metal wire using a driven drum wrapped in wire with several turns in the heat treatment area.

Vorrichtungen dieser Gattung ermöglichen bei platzsparender Bauweise eine relativ lange Verweilzeit des Drahtes in der Wärmebehandlungszone. Bei einer aus der DE-B-595.364 bekannten, als Glühofen ausgebildeten Vorrichtung dieser Gattung ist die Trommel derart konisch gestaltet, daß derTrommeldurchmesservon der Zulaufstelle des Drahtes zu dessen Ablaufstelle allmählich abnimmt. Auf diese Weise soll erreicht werden, daß die Windungen die Trommel am Ablaufende mit Spiel umschließen, damit hier stets eine größere freie Drahtlänge für die Verarbeitung in einer intermittierend arbeitenden Stauchpresse für die Herstellung von Schraubenbolzen und ähnlichen Gegenständen zur Verfügung steht.Devices of this type enable a relatively long residence time of the wire in the heat treatment zone with a space-saving design. In a device of this type, known from DE-B-595.364, designed as an annealing furnace, the drum is designed conically in such a way that the drum diameter gradually decreases from the point of entry of the wire to its point of discharge. In this way it should be achieved that the windings enclose the drum at the end of the run with play so that there is always a larger free wire length for processing in an intermittently working upsetting press for the production of screw bolts and similar objects.

Bei kontinuierlichem Abzug des Drahtes vom Ablaufende der Trommel ist ein solches Spiel zwischen Draht und Trommel unerwünscht, vielmehr soll der Draht zur Vermeidung einerwillkürlichen Verlagerung der Windungen und zur Sicherung einerverteilten Haftreibung für den Drahtvorschub am Trommelumfang möglichst gleichmäßig anliegen. Da im Falle einer Glühbehandlung sich der Draht vom Zulaufende zum Ablaufende der Trommel hin durch Wärmedehnung verlängert und im Falle einer Kühlbehandlung infolge der Schrumpfung des Drahtes umgekehrte Verhältnisse vorliegen, müßte bei Verwendung einer konischen Trommel der Trommeldurchmesser von der Zulaufstelle des Drahtes zu dessen Ablaufstelle im ersten Fall allmählich zunehmen und im zweiten Fall allmählich abnehmen, u.zw. in einem der Längsänderung des Drahtes entsprechenden Ausmaß.With continuous removal of the wire from the end of the drum, such a play between the wire and the drum is undesirable, rather the wire should lie as evenly as possible on the drum circumference in order to avoid an arbitrary displacement of the turns and to ensure a distributed static friction for the wire feed. Since in the case of an annealing treatment the wire extends from the inlet end to the outlet end of the drum due to thermal expansion and in the case of a cooling treatment due to the shrinkage of the wire, the situation is reversed, if a conical drum is used, the drum diameter from the inlet point of the wire to its outlet point in the first Increase the case gradually and gradually decrease in the second case, etc. to an extent corresponding to the longitudinal change in the wire.

Wenn der Draht über die gesamte Länge der Trommel an deren Umfang anliegt, ergibt sich allerdings ein Problem bei Betriebsunterbrechungen, unabhängig von deren Ursache. Eine Ursache einer Betriebsunterbrechung kann darin bestehen, daß sich der Draht bei Abzug von einer Haspel verheddert. Im Falle einer Unterbrechung beim Drahtglühen wird der in der Wärmebehandlungszone verbleibende Drahtabschnitt so lange erhitzt, daß er praktisch ausgeglüht und damit unbrauchbar wird, wobei zusätzlich die Gefahr besteht, daß der sich bei einer allfälligen Abkühlung wieder zusammenziehende Draht zufolge des Widerstandes der starren Trommel so starken Dehnbeanspruchungen unterworfen wird, daß er reißt. Diese Reißgefahr besteht auch bei Unterbrechung einer Kühlbehandlung des um eine starre Trommel geschlungenen Drahtes.However, if the wire lies against the circumference of the entire length of the drum, there is a problem in the event of stoppages regardless of the cause. A cause of an interruption in operation can be that the wire gets tangled when it is pulled off a reel. In the event of an interruption in the wire annealing, the wire section remaining in the heat treatment zone is heated so long that it is practically annealed and thus becomes unusable, and there is also the risk that the wire, which may contract again in the event of cooling, will become so strong due to the resistance of the rigid drum Stretching is subjected to the fact that it tears. This danger of tearing also exists when a cooling treatment of the wire wound around a rigid drum is interrupted.

Die Erfindung befaßt sich deshalb zunächst mit der Aufgabe, bei einer Wärmebehandlungsvorrichtung der einleitend angegebenen Gattung die Gefahr eines Reißens des Drahtes im Falle einer gewollten oder durch eine Störung erzwungenen Betriebsunterbrechung zu beheben.The invention is therefore first of all concerned with the object of eliminating the risk of the wire breaking in the event of an intentional or forced interruption of operation in a heat treatment device of the type specified in the introduction.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der vom kontinuierlich bewegten Draht umschlungenen Trommel eine Spannwalze oder eine Gruppe von Spannwalzen zugeordnet ist, deren Achslage aus einer vorgegebenen Ruhelage heraus gegenüber der Achslage der Trommel veränderbar ist, und daß Einrichtungen zum Ändern der Achslage der Spannwalze bzw. jeder Spannwalze der Gruppe im Sinne des Spannens der die Trommel und die bzw. jede Spannwalze jeweils in Serie umschlingenden Windungen des Drahtes mit begrenzter Spannkraft vorgesehen sind.This object is achieved in that the drum wound by the continuously moving wire is assigned a tensioning roller or a group of tensioning rollers, the axial position of which can be changed from a predetermined rest position relative to the axial position of the drum, and that devices for changing the axial position of the tensioning roller or Each tensioning roller of the group is provided with a limited tensioning force in the sense of tensioning the windings of the wire wrapping around the drum and / or each tensioning roller in series.

Auf diese Weise wird von der Trommel und der Spannwalze bzw. der Spannwalzengruppe ein von den Drahtwindungen umschlungenes System gebildet, dessen Umfang durch Änderung der Achslage der Spannwalze bzw. jeder Spannwalze bezüglich der Achslage der Trommel veränderbar ist, so daß bei Überschreiten einer bestimmten Spannung im Draht durch Änderung der relativen Achslagen eine Entlastung des Drahtes ermöglicht und damit ein Reißen desselben verhindert wird.In this way, the drum and the tensioning roller or the tensioning roller group form a system wrapped in the wire windings, the scope of which can be changed by changing the axial position of the tensioning roller or each tensioning roller with respect to the axial position of the drum, so that when a certain tension in the Wire allows the wire to be relieved by changing the relative axis positions and thus prevents the wire from tearing.

Im einfachsten Fall kann die Achse der Spannwalze bzw. jeder Spannwalze einer Spannwalzengruppe bezüglich der Achse der Trommel parallel verschiebbar geführt sein. Besonders vorteilhaft ist es aber, die Achse der Spannwalze bzw. jeder Spannwalze einer Spannwalzengruppe an einem Ende schwenkbar zu lagern, und zwar zum Glühen des Drahtes nahe ihrem drahtzulaufseitigen Ende und zum Kühlen des Drahtes nahe ihrem drahtablaufseitigen Ende. Auf diese Weise wird, wie später an Ausführungsbeispielen noch genauer erläutert wird, erreicht, daß sich der Umfang des von der Trommel und der Spannwalze bzw. der Gruppe von Spannwalzen gebildeten Systems längs der Systemachse selbsttätig entsprechend der Dehnung bzw. Schrumpfung des Drahtes beim Glühen bzw. Kühlen verändern kann, womit wirkungsmäßig eine konische Trommel veränderlicher Konizität nachgeahmt wird und die Drahtwindungen an der Trommel und an der bzw. an jeder Spannwalze gut anliegen, ohne daß die Gefahr eines Reißens des Drahtes bei Betriebsunterbrechung besteht. Wie später noch genauer erläutert wird, kann ferner die Verschiebbarkeit der Achse der bzw. jeder Spannwalze mit einer Verschwenkbarkeit derselben bezüglich der Trommelachse kombiniert werden.In the simplest case, the axis of the tensioning roller or each tensioning roller of a tensioning roller group can be guided in parallel with respect to the axis of the drum. However, it is particularly advantageous to pivotally support the axis of the tensioning roller or each tensioning roller of a tensioning roller group at one end, specifically for annealing the wire near its end on the wire feed side and for cooling the wire near its end on the wire exit side. In this way, as will be explained in more detail later with exemplary embodiments, the extent of the system formed by the drum and the tensioning roller or the group of tensioning rollers along the system axis automatically changes in accordance with the stretching or shrinking of the wire during annealing or Cooling can change, which effectively mimics a conical drum of variable conicity and the wire windings on the drum and on or on each tensioning roller fit well, without the risk of the wire tearing when the business is interrupted. As will be explained in more detail later, the displaceability of the axis of the or each tension roller can also be combined with the pivotability thereof with respect to the drum axis.

Die Trommel und die Spannwalze bzw. die Gruppe von Spannwalzen können sich in einem gegebenenfalls mit Schutzgas gefüllten Ofengehäuse befinden. Das Ofengehäuse soll dabei eine bei Betriebsunterbrechung der Vorrichtung automatisch öffnende Haube aufweisen, in welcher vorzugsweise die Heizeinrichtung des Ofens angeordnet ist, wodurch erreicht wird, daß im Falle einer Betriebsunterbrechung nicht nur ein Reißen des Drahtes verhindert, sondern auch ein Ausglühen des im Ofen verbleibenden Drahtabschnittes durch Ermöglichung einer Abkühlung desselben vermieden wird.The drum and the tensioning roller or the group of tensioning rollers can be located in an oven housing which may be filled with protective gas. The furnace housing should have a hood that opens automatically when the device is interrupted, in which the heating device of the furnace is preferably arranged, whereby in the event of an interruption in operation not only prevents the wire from tearing, but also prevents the wire section remaining in the furnace from annealing by allowing it to cool down.

Weitere Merkmale und Vorteile der Erfindung gehen aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen hervor. In diesen zeigen:

  • Fig. 1 eine Draufsicht auf eine als Glühofen dienende Vorrichtung nach der Erfindung bei abgehobener Ofenhaube;
  • Fig. 2 eine Ansicht der abgehobenen Haube;
  • Fig. 3 eine Seitenansicht zu Fig. 1 in teilweisem Schnitt; die
  • Fig. 4 und 5 eine teilweise Draufsicht bzw. Seitenansicht entsprechend den Fig. 1 und 3 einer bevorzugten Ausführungsform der Erfindung mit schwenkbarer Spannwalze;
  • Fig. 6 eine sowohl parallel verschiebbare als auch schwenkbare Spannwalze für eine erfindungsgemäße Vorrichtung;
  • Fig. 7 eine erfindungsgemäße Vorrichtung, bei welcher der Trommel eine Gruppe von Spannwalzen zugeordnet ist, und
  • Fig. 8 eine vorteilhafte Ausbildung der Trommel und/oder der Spannwalze.
Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the drawings. In these show:
  • Figure 1 is a plan view of a device serving as an annealing furnace according to the invention with the furnace hood lifted.
  • Fig. 2 is a view of the hood removed;
  • Fig. 3 is a side view of Figure 1 in partial section. the
  • 4 and 5 a partial top view and side view corresponding to FIGS. 1 and 3 of a preferred embodiment of the invention with a pivotable tensioning roller;
  • 6 shows a tensioning roller, which can be displaced in parallel as well as swiveling, for a device according to the invention;
  • 7 shows a device according to the invention, in which a group of tensioning rollers is assigned to the drum, and
  • Fig. 8 shows an advantageous embodiment of the drum and / or the tension roller.

Der in den Fig. 1 bis 3 allgemein mit 1 bezeichnete Glühofen hat ein Gehäuse, das aus einer Grundplatte 2 und einer auf diese mittels Henkeln 4 aufsetzbaren Haube 3 besteht, an deren vertikalen Seitenwänden 5 vorteilhaft die Heizeinrichtungen des Ofens montiert ist.The annealing furnace generally designated 1 in FIGS. 1 to 3 has a housing which consists of a base plate 2 and a hood 3 which can be placed thereon by means of handles 4, on the vertical side walls 5 of which the heating devices of the furnace are advantageously mounted.

Im Inneren des Glühofens 1 ist eine Trommel 6 angeordnet, die drehfest mit einer die Grundplatte 2 durchsetzenden Welle 7 verbunden ist. Die Welle 7 trägt an ihrem aus dem Glühofen 1 herausragenden Ende ein Antriebsorgan, z.B. eine Riemenscheibe 8.A drum 6 is arranged in the interior of the annealing furnace 1 and is connected in a rotationally fixed manner to a shaft 7 passing through the base plate 2. At its end protruding from the annealing furnace 1, the shaft 7 carries a drive element, e.g. a pulley 8.

Im Abstand von der Trommel 6 ist eine Spannwalze 10 vorgesehen, die mit Achsstummeln 11 an den freien Enden zweier einarmiger Hebel 12, 13 drehbar gelagert ist. Die anderen Enden der einarmigen Hebel 12, 13 sind an einer Welle 14 befestigt. Die Welle 14 durchsetzt ebenfalls die Grundplatte 2 des Glühofens und trägt an ihrem äußeren Ende einen einarmigen Hebel 15, an dessen freiem Ende die Kolbenstange 16 einer Zylinder-Kolben-Anordnung 17 angreift. Durch Beaufschlagen des Kolbens der Anordnung 17 mit Druckluft vorgegebenen Druckes kann der die Trommel 6 und die Spannwalze 10 mit mehreren Windungen umschlingende Draht 18 mit einer beliebigen Zugkraft belastet werden, die so gewählt wird, daß die Warmfestigkeit des Drahtes 18 nicht überschritten wird und es dem Draht im Falle einer plötzlichen Abkühlung möglich ist, sich zusammenzuziehen, ohne zu reißen.At a distance from the drum 6, a tensioning roller 10 is provided, which is rotatably mounted with stub axles 11 at the free ends of two one-armed levers 12, 13. The other ends of the one-armed lever 12, 13 are attached to a shaft 14. The shaft 14 also passes through the base plate 2 of the annealing furnace and carries at its outer end a one-armed lever 15, at the free end of which the piston rod 16 engages a cylinder-piston arrangement 17. By acting on the piston of the arrangement 17 with compressed air predetermined pressure, the drum 6 and the tension roller 10 with several turns wrapping wire 18 can be loaded with any tensile force that is selected so that the heat resistance of the wire 18 is not exceeded and it Wire in the event of a sudden cooling is possible to contract without tearing.

Im Falle einer Abschaltung der Vorrichtung oder eines Stillstandes derselben infolge einer Betriebsstörung bestünde weiterhin die Gefahr, daß der im Glühofen befindliche Drahtabschnitt ausgeglüht und unbrauchbar wird. Um auch das zu vermeiden, soll die Ofenhaube 3, vorzugsweise samt der Heizeinrichtung für den Ofen, bei einer Betriebs unterbrechung automatisch abgehoben werden, so daß die Möglichkeit einer raschen Abkühlung der Drahtwindungen geschaffen wird, die nutzbar ist, weil die damit verbundene Reißgefahr erfindungsgemäß behoben worden ist.In the event of the device being switched off or at a standstill as a result of a malfunction, there would still be the danger that the wire section located in the annealing furnace would be burned out and rendered unusable. In order to avoid this as well, the furnace hood 3, preferably together with the heating device for the furnace, should be automatically lifted during an interruption in operation, so that the possibility of rapid cooling of the wire windings is created, which can be used because the associated risk of tearing is eliminated according to the invention has been.

Um gegebenenfalls den Raum unter der Ofenhaube 3 in an sich bekannter Weise mit Schutzgas füllen zu können, können in der Grundplatte 2 entsprechende Bohrungen 19 vorgesehen sein. Der gesamte Glühofen 1 kann dann von einer größeren, mit Schutzgas gefüllten Haube umgeben sein, damit sich der Abkühlvorgang nach Abheben der Ofenhaube 3 in einer ausreichenden Schutzgasatmosphäre vollzieht.In order to be able to fill the space under the furnace hood 3 with protective gas in a manner known per se, appropriate bores 19 can be provided in the base plate 2. The entire annealing furnace 1 can then be surrounded by a larger hood filled with protective gas, so that the cooling process takes place after the furnace hood 3 has been lifted off in a sufficient protective gas atmosphere.

Damit das Abheben der Haube 3 vom zulaufenden Draht 18 nicht behindert wird, ist an der Grundplatte 2 gemäß Fig. 3 ein Wandteil 26 vorgesehen, in welchem sich eine Zulaufführung 27 für den Draht befindet, und in der Haube 3 ist eine entsprechende Ausnehmung vorgesehen, in welche der Wandteil 26 eingreifen kann Der auslaufende Teil des Drahtes liegt knapp über der Oberkante der Grundplatte 2 und kann daher durch einen einfachen U-förmigen Schlitz der Haube geleitet werden.So that the lifting of the hood 3 from the incoming wire 18 is not hindered, a wall part 26 is provided on the base plate 2 according to FIG. 3, in which there is an inlet guide 27 for the wire, and a corresponding recess is provided in the hood 3 into which the wall part 26 can engage The outgoing part of the wire lies just above the upper edge of the base plate 2 and can therefore be passed through a simple U-shaped slot in the hood.

Die Fig. 4 und 5 zeigen in Draufsicht bzw. Seitenansicht eine bevorzugte Art der Lagerung der Spannwalze 10. Die Achsstummeln 11 der Spannwalze sind mittels Kugelgelenken 33 schwenkbar gelagert, u.zw. das eine Walzenende (das drahtzulaufseitige beim Glühen bzw. das drahtablaufseitige beim Kühlen) in einer ortsfesten Lagerpfanne, die von einer mit der Grundplatte 2 fest verbundenen Konsole 28 getragen wird, und das andere Ende in einer verstellbaren Lagerpfanne, die sich an einem Ende eines einarmigen Hebels 13 befindet, dessen anderes Ende drehfest mit einer die Grundplatte 2 durchsetzenden Welle 14 verbunden ist. An dem aus dem Ofengehäuse herausragenden Ende der Welle 14 greift ein einarmiger Hebel 15', der an seinem freien Ende ein Langloch aufweist, in welches ein mit der Kolbenstange 16 einer Zylinder-Kolben-Anordnung 17 verbundener Mitnehmer eingreift.4 and 5 show a preferred type of mounting of the tensioning roller 10 in plan view and side view. The stub axles 11 of the tensioning roller are pivotably mounted by means of ball joints 33, etc. one end of the roll (the wire inlet side during annealing or the wire outlet side during cooling) in a stationary bearing pan, which is supported by a bracket 28 fixedly connected to the base plate 2, and the other end in an adjustable bearing pan, which is armed at one end of one Lever 13 is located, the other end is rotatably connected to a shaft 14 passing through the base plate 2. At the end of the shaft 14 protruding from the furnace housing, a one-armed lever 15 ′ engages, which has an elongated hole at its free end, into which a driver connected to the piston rod 16 of a cylinder-piston arrangement 17 engages.

Im Falle eines Glühofens sind zu Betriebsbeginn, also im kalten Zustand des die Trommel 6 und die Spannwalze 10 umschlingenden Drahtes 18, die Achsen der Trommel und die Spannwalze parallel zueinander. Mit zunehmender Erhitzung des Drahtes dehnt sich dieser, so daß eine kontinuierliche Verlängerung der Drahtwindungen vom Zulaufende zum Ablaufende der Trommel auftritt. Durch die Kolben-Zylinder-Anordnung 17 wird dann eine solche Schrägstellung der Achse der Spannwalze 10 erzwungen, daß die Umfangslänge des Systems Trommel-Spannwalze in Achsrichtung von der Zulaufstelle des Drahtes zur Ablaufstelle desselben hin zunimmt und der Draht 18 im wesentlichen gleichmäßig an der Trommel und an der Spannwalze anliegt.In the case of an annealing furnace, the axes of the drum and the tensioning roller are parallel to one another at the start of operation, that is to say in the cold state of the wire 18 wrapping around the drum 6 and the tensioning roller 10. As the wire heats up, it expands so that there is a continuous lengthening of the wire windings from the inlet end to the outlet end of the drum. The piston-cylinder arrangement 17 then forces such an inclination of the axis of the tensioning roller 10 that the circumferential length of the system drum-tensioning roller increases in the axial direction from the inlet point of the wire to the outlet point thereof and the wire 18 is essentially uniform on the drum and lies against the tension roller.

Fig. 6 zeigt eine Anordnung der Spannwalze 10, bei welcher sich diese sowohl verschieben als auch verschwenken kann. Hiebei sind an Stelle der Welle 14 zwei koaxiale Wellen 29, 30 vorgesehen. Mit einem Ende der Innenwelle 29 ist ein einarmiger Hebel 31 und mit einem Ende der Außenwelle 30 ist ein einarmiger Hebel 32 drehfest verbunden. Jeder der einarmigen Hebel 31, 32 trägt an seinem freien Ende eine Lagerpfanne, in welche einer der Achsstummel 11 der Spannwalze 10 mit einem Kugelgelenk 33 eingreift. An ihren unteren, aus dem Glühofen herausragenden Enden sind die koaxialen Wellen 29, 30 mittels je einer Kolben-Zylinder-Anordnung analog der Anordnung 17 in Fig. 1, unabhängig voneinander im Sinne des Spannens des die Trommel 6 und die Spannwalze 10 umschlingenden Drahtes federbelastet.Fig. 6 shows an arrangement of the tension roller 10, in which it can both move and pivot. Instead of the shaft 14, two coaxial shafts 29, 30 are provided. A one-armed lever 31 is connected to one end of the inner shaft 29 and a one-armed lever 32 is rotatably connected to one end of the outer shaft 30. Each of the one-armed levers 31, 32 carries at its free end a bearing socket, into which one of the stub axles 11 is the instep roller 10 engages with a ball joint 33. At their lower ends protruding from the annealing furnace, the coaxial shafts 29, 30 are spring-loaded by means of a piston-cylinder arrangement analogous to the arrangement 17 in FIG. 1, independently of one another in the sense of tensioning the wire wrapping around the drum 6 and the tensioning roller 10 .

Durch gleichsinnige Drehung der beiden Wellen 29 und 30 wird die Spannwalze 10 parallel verschoben, und durch Drehung der Außenwelle 30 allein wird die Spannwalze 10 um das in Fig. 6 oben liegende Ende geschwenkt. Durch gegensinnige Drehung der beiden Wellen 29 und 30 um gleiche Winkelbeträge wird die Spannwalze um ihren Achsmittelpunkt geschwenkt. Durch Drehung der beiden Wellen 29 und 30 um ungleiche Winkelbeträge kann schließlich die Spannwalze 10 parallel verschoben und verschwenkt werden.By rotating the two shafts 29 and 30 in the same direction, the tensioning roller 10 is displaced in parallel, and by rotating the outer shaft 30 alone, the tensioning roller 10 is pivoted about the end lying at the top in FIG. 6. By rotating the two shafts 29 and 30 in opposite directions by the same angular amounts, the tensioning roller is pivoted about its axis center. By rotating the two shafts 29 and 30 by unequal angular amounts, the tensioning roller 10 can finally be moved and pivoted in parallel.

Eine weitere Ausgestaltung der Erfindung ist in schematischer Draufsicht (bei abgehobener Ofenhaube) in Fig. 7 dargestellt. Gemäß Fig. 7 ist um eine Trommel 6 eine Gruppe von sechs Spannwalzen 10' sternförmig angeordnet. Diese Spannwalzen 10' können verschiebbar und/oder verschwenkbar gelagert sein, wie dies anhand der Fig. 1 bis 3 (verschiebbare Lagerung), der Fig. 4 und 5 (verschwenkbare Lagerung) und von Fig. 6 (verschiebbare und verschwenkbare Lagerung) beschrieben worden ist. In Fig. 6 sind der Einfachheit halber für die Spannwalzenanordnung die gleichen Bezugszeichen wie in den Fig. 1 bis 3 verwendet worden.A further embodiment of the invention is shown in a schematic top view (with the furnace hood raised) in FIG. 7. 7, a group of six tensioning rollers 10 'is arranged in a star shape around a drum 6. These tensioning rollers 10 'can be mounted displaceably and / or pivotably, as has been described with reference to FIGS. 1 to 3 (displaceable mounting), FIGS. 4 and 5 (pivotable mounting) and from FIG. 6 (displaceable and pivotable mounting) is. In FIG. 6, the same reference numerals as in FIGS. 1 to 3 have been used for the tensioning roller arrangement for the sake of simplicity.

Der Draht kann in weitgehend beliebiger Weise abwechselnd über die Trommel 6 und eine der Spannwalzen 10' geführt werden. Die Spannwalzen 10' können im wesentlichen gleiche Länge wie die Trommel 6 haben, wodurch sich eine besonders große Freiheit bezüglich der Drahtführung über das Trommel-Spannwalzen-System ergibt. Die Spannwalzen können aber auch nur einen Bruchteil der Länge der Trommel haben, im dargestellten Beispiel etwa ein Sechstel dieser Länge, wobei jede Spannwalze einem bestimmten Längenabschnitt der Trommelachse gegenüberliegend angeordnet wird und der Draht mit mehreren Windungen über die Trommel und die erste Spannwalze, dann über die Trommel und die zweite Spannwalze usw. geführt wird.The wire can be guided alternately over the drum 6 and one of the tensioning rollers 10 'in a largely arbitrary manner. The tensioning rollers 10 'can have essentially the same length as the drum 6, which results in a particularly great freedom with regard to the wire guidance over the drum tensioning roller system. However, the tensioning rollers can also have only a fraction of the length of the drum, in the example shown about a sixth of this length, each tensioning roller being arranged opposite a certain length of the drum axis and the wire with several turns over the drum and the first tensioning roller, then over the drum and the second tension roller, etc. is guided.

Um eine einwandfreie Führung des Drahtes 18 um die Trommel 6 bzw. um die Spannwalze 10 zu sichern, können deren Oberflächen schraubenlinienförmig verlaufende Rillen 25 aufweisen, wie dies in Fig. 8 dargestellt ist.In order to ensure proper guidance of the wire 18 around the drum 6 or around the tensioning roller 10, the surfaces thereof can have helical grooves 25, as shown in FIG. 8.

Für spezielle Wärmebehandlungszwecke ist es möglich, zwei mit Schutzgas gefüllte Vorrichtungen nach der Erfindung vorzusehen, welche durch eine die beiden Vorrichtungen luftdicht verbindende Rohrleitung zu einer Einheit zusammengefaßt sind, wobei lediglich die erste Vorrichtung beheizt, die zweite hingegen zur Kühlung mit Schutzgas unter Raumtemperatur durchspült wird. Hiebei werden die Spannwalzen 10 zweckmäßig, wie anhand der Fig. 4 und 5 beschrieben, in der ersten Vorrichtung am drahtzulaufseitigen Ende und in der zweiten Vorrichtung am drahtablaufseitigen Ende gelenkig gelagert.For special heat treatment purposes, it is possible to provide two devices filled with protective gas according to the invention, which are combined to form a unit by a pipeline connecting the two devices in an airtight manner, only the first device being heated and the second being flushed with protective gas at room temperature for cooling . The tensioning rollers 10 are expediently articulated, as described with reference to FIGS. 4 and 5, in the first device at the wire feed end and in the second device at the wire run end.

Die erfindungsgemäße Vorrichtung eignet sich zur Wärmebehandlung von Drähten weitgehend beliebiger Querschnittsform und insbesondere auch von Drähten unterschiedlicher Metallzusammensetzung und entsprechend verschiedener erforderlicher Behandlungstemperaturen, zumal sich die Spannwalzen selbsttätig in Abhängigkeit von der temperaturabhängigen Längenänderung des Drahtes verstellen.The device according to the invention is suitable for the heat treatment of wires of largely any cross-sectional shape and in particular also of wires of different metal compositions and according to different required treatment temperatures, especially since the tensioning rollers are automatically adjusted depending on the temperature-dependent change in length of the wire.

Claims (12)

1. Apparatus for the heat treatment, especially annealing, of a continuously advanced metal wire, with a driven drum, round which several turns of the wire are looped, being used in the heat-treatment zone, characterized in that the drum (6) has assigned to it a tension roller (10) or a group of tension rollers (10'), the axle position of which can be varied relative to the axle position of the drum (6) from a predetermined position of rest and in that there are devices (14, 15, 16, 17) for changing the axle position of the tension roller or of each tension roller (10') of the group for the purpose of tensioning with a limited tension force the turns of the wire (18) which loop in series round the drum (6) and the or each tension roller (10 or 10').
2. Apparatus according to Claim 1, characterized in that the axle of the or each tension roller (10 or 10') is guided so as to be displaceable parallel to the axle of the drum (6).
3. Apparatus according to Claim 1 for the annealing of a wire, characterized in that the axle of the or each tension roller (10 or 10') is mounted pivotably near its wire feed end.
4. Apparatus according to Claim 1 for the cooling of a hot wire, characterized in that the axle of the or each tension roller (10 or 10') is mounted pivotably near its wire run-off end.
5. Apparatus according to Claim 1 characterized in that the axle of the or each tension roller (10 or 10') is guided so as to be displaceable in parallel to a limited extent from its position of rest and is mounted pivotably between its two ends.
6. Apparatus according to one of Claims 1 to 5, characterized in that the tension rollers (10') of a tension-roller group which are assigned to the drum (6) are arranged in different radial directions relative to the axle of the drum (6), preferably in the form of a star round this axle.
7. Apparatus according to one of Claims 1 to 6, characterized in that the or each tension roller (10 or 10') has a smaller diameter than the drum (6).
8. Apparatus according to one of Claims 1 to 7, characterized in that the axle position of the or each tension roller (10 or 10') can be varied according to the change in length of the wire turns, during the heat treatment, as a result of spring force, especially by means of a pneumatic piston/cylinder arrangement (17).
9. Apparatus according to one of Claims 1 to 8, characterized in that helically extending guide grooves (25) for the wire are provided along the periphery of the drum (6) and/or of the or each tension roller (10 or 10').
10. Apparatus according to one of the preceding claims, characterized in that the drum (6) and the tension roller (10) or the group of tension rollers (10) are located in a furnace housing (1) filled, if appropriate, with inert gas.
11. Apparatus according to Claim 10, characterized in that the furnace housing (1) has a hood (3) which opens automatically in the event of an interruption in operation and in which the heating means of the furnace is preferably arranged.
12. Apparatus for the annealing and subsequent cooling of a continuously moved wire, characterized in that an apparatus according to Claim 3 and an apparatus according to Claim 4 are connected in series.
EP87890213A 1986-09-26 1987-09-14 Apparatus for heat-treating a continuously moving metal wire Expired - Lifetime EP0263093B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2578/86 1986-09-26
AT0257886A AT389321B (en) 1986-09-26 1986-09-26 DEVICE FOR HEAT TREATING A CONTINUOUSLY PROGRESSIVE METAL WIRE

Publications (3)

Publication Number Publication Date
EP0263093A2 EP0263093A2 (en) 1988-04-06
EP0263093A3 EP0263093A3 (en) 1988-08-10
EP0263093B1 true EP0263093B1 (en) 1991-01-09

Family

ID=3536809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87890213A Expired - Lifetime EP0263093B1 (en) 1986-09-26 1987-09-14 Apparatus for heat-treating a continuously moving metal wire

Country Status (7)

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US (1) US4913650A (en)
EP (1) EP0263093B1 (en)
JP (1) JPS6389629A (en)
AT (1) AT389321B (en)
DE (1) DE3767264D1 (en)
ES (1) ES2001331B3 (en)
GR (2) GR880300106T1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524588C2 (en) * 2002-12-23 2004-08-31 Sandvik Ab Method and apparatus for cooling strip and wire material
US20070095006A1 (en) * 2005-11-01 2007-05-03 Konersmann Ronald D Lightweight portable concrete enclosure and associated method of construction

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342892A (en) * 1930-01-31 1931-02-12 Gerster Heinrich Improvements in apparatus for drying and imparting gloss to photographs
DE595364C (en) * 1932-12-28 1934-04-13 Kuhne G M B H Heat furnace with rotatable drum inside
US2654139A (en) * 1949-03-10 1953-10-06 United States Steel Corp Continuous strand helical conveying apparatus
US2589411A (en) * 1949-04-05 1952-03-18 United States Steel Corp Continuous strand helical conveying apparatus
US2628790A (en) * 1949-05-04 1953-02-17 Westfalenhutte Dortmund Ag Reeling furnace for hot band rolling
US2587742A (en) * 1949-05-10 1952-03-04 United States Steel Corp Apparatus for continuously processing strands
US2622860A (en) * 1949-05-10 1952-12-23 United States Steel Corp Apparatus for continuously processing strands
US2952451A (en) * 1958-10-22 1960-09-13 United States Steel Corp Strip breakage detecting apparatus for continuous strip furnaces
GB969192A (en) * 1959-09-26 1964-09-09 Somerset Wire Company Ltd A new or improved method of processing wire
DE1206458B (en) * 1960-09-13 1965-12-09 Vaughn Machinery Company Device for the heat treatment of wire
GB1343812A (en) * 1972-06-29 1974-01-16 British Ropes Ltd Treating elongate metal elements
US3921317A (en) * 1973-10-26 1975-11-25 Armstrong Cork Co Apparatus to iron fibers on a moving web
US3857673A (en) * 1974-03-08 1974-12-31 E Andrus Apparatus for heat treating continuous wire and rod
DE2425738C2 (en) * 1974-05-28 1986-03-27 Drabert Söhne Minden (Westf.), 4950 Minden Continuously working decating machine
JPS5852009B2 (en) * 1979-09-05 1983-11-19 東北金属工業株式会社 Continuous annealing method for magnetic metal wire
JPS6044378B2 (en) * 1980-12-05 1985-10-03 三菱電機株式会社 Continuous annealing equipment for wire rods

Also Published As

Publication number Publication date
GR880300106T1 (en) 1988-12-16
JPS6389629A (en) 1988-04-20
ES2001331A4 (en) 1988-05-16
DE3767264D1 (en) 1991-02-14
AT389321B (en) 1989-11-27
US4913650A (en) 1990-04-03
ATA257886A (en) 1989-04-15
EP0263093A3 (en) 1988-08-10
GR3001298T3 (en) 1992-08-26
EP0263093A2 (en) 1988-04-06
ES2001331B3 (en) 1991-07-01

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