EP0277109B1 - Apparatus for heat-treating (in particular annealing) a continuously moving metal wire - Google Patents

Apparatus for heat-treating (in particular annealing) a continuously moving metal wire Download PDF

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Publication number
EP0277109B1
EP0277109B1 EP88890005A EP88890005A EP0277109B1 EP 0277109 B1 EP0277109 B1 EP 0277109B1 EP 88890005 A EP88890005 A EP 88890005A EP 88890005 A EP88890005 A EP 88890005A EP 0277109 B1 EP0277109 B1 EP 0277109B1
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EP
European Patent Office
Prior art keywords
wire
drums
heating chamber
deflection
drum
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.)
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EP88890005A
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German (de)
French (fr)
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EP0277109A1 (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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    • 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 arrangement of a drum wrapped in wire directly in the heat treatment area means that the drum itself is heated excessively and in the case of e.g. due to tangling of the interruption in the operation caused by the wire drawn off a reel, the wire in the looping area heats up even further when the temperature in the heat treatment area drops, for example by switching off the radiators and opening a housing enclosing the drum. This results in the risk that the relevant sections of the wire will anneal and become unusable.
  • the invention is therefore concerned with the task of a heat treatment device for a continuous form the advancing wire in such a way that the wire can be passed through a heat treatment area of moderate dimensions with the longest possible dwelling time without the need to arrange drum-like rotating bodies which are wrapped in the wire in the heat treatment area and which are heated to high temperature and thereby cause the difficulties described above.
  • an essentially all-round heating chamber is arranged between two mutually axially parallel and rotatably mounted deflection drums which have self-contained wire guide grooves on their outer surface, the wall of which in the intersection areas with the common outer ones Tangential planes on the two deflection drums has inlet and outlet openings for the wire to be looped around the two deflection drums with a plurality of turns lying next to one another, at least one of the two deflection drums being motor-driven and in the heating chamber along the two groups of them traversing back and forth Wire sections radiators are arranged.
  • the drums wrapped in the wire are outside the heating chamber and they are heated only by contact with the heated wire, i.e. considerably less than in the older devices, which also results in the heat returned to the wire by each drum in the event of a break in operation is significantly less and, moreover, problems with regard to the storage of the drums are eliminated.
  • the heating chamber is formed by a base plate and an elongated hood-like housing which can be lifted off the latter and has slots on its two narrow sides, starting from the base of the housing and parallel to the axes of the deflecting rollers, as entry and exit openings for the two groups of Has wire sections and carries the radiator inside on its two long sides.
  • the hood Like housing can then be easily lifted, on the one hand to load the device with the wire during the first start-up by wrapping the drums and on the other hand to remove the radiator from the area affected by the wire in all of a business interruption.
  • the deflection drums are advantageous according to the previously mentioned older proposal by the applicant rotatable, disc-shaped bodies of rotation, each of which has self-contained wire guide grooves on its circumference.
  • the disk-shaped rotating bodies can then rotate against one another with friction and thereby effectively change the wrap angle. It is particularly advantageous if the diameters of the disk-shaped rotating bodies increase along at least one of the drum axes, etc. in relation to the thermal expansion of the wire to be expected along the drum, preferably disproportionately. This ensures that the wire remains firmly in contact with the drum jacket in spite of the wire being heated and the thermal expansion caused by it.
  • the device according to FIGS. 1 and 2 has a heating chamber 1 formed by a base plate 3 and a hood-like housing 4 which can be lifted off and which is expediently arranged upstream and downstream of the deflection drums 5 arranged outside the heating chamber 1.
  • a heating chamber 1 formed by a base plate 3 and a hood-like housing 4 which can be lifted off and which is expediently arranged upstream and downstream of the deflection drums 5 arranged outside the heating chamber 1.
  • slots 9 are formed in the intersection areas with the common outer tangential planes on the two deflection drums 5 to the axes of the deflection drums, starting from the base of the housing and from on - And exit openings of the chamber 1 for the back and forth wire coulters 8a and 8b serve, which result from the wrapping of the two deflection drums 5 with a plurality of turns of the wire 8.
  • the formation of these inlet and outlet openings by slots extending from the housing base enables the hood-like housing 4 to be lifted off
  • holes can be provided in the base plate 3.
  • the entire device can moreover be surrounded by a larger hood filled with protective gas, so that the wire cools down in an adequate protective gas atmosphere when the hood-like housing 4 is lifted in the event of an interruption in operation.
  • One of the receiving chambers 2 for the deflection drums 5 has inlet and outlet openings 11 for the continuously running wire 8, which are arranged in the interior of the heat treatment device in accordance with the wire guide. It is also possible to provide the inlet opening in one of the chambers 2 and the outlet opening for the wire in the other chamber 2.
  • the deflection drums 5 can be cylindrical rollers, which have self-contained wire guide grooves 6 on their outer surface, the depth of which is so large that the wire 8 they accommodate cannot fall out of the grooves even when thermal expansion occurs.
  • a wire take-off device, not shown, downstream of the heat treatment device, can hold the wire under tension so far in this embodiment that it is held in contact with the drums 5 despite stretching when it is heated.
  • At least one of the drums 5 can be driven by a motor 12 and, as shown in FIG. 1, both drums can optionally also be connected to one another by means of chain wheels 13 and a chain 14.
  • Rows of radiators 10 are attached to the chamber walls on both sides of the movement path of the wire shares 8a and 8b passing through the heating chamber 1. However, it is also possible to provide only one row of radiators, either laterally or in the middle between the movement paths of the two wire shares 8a and 8b.
  • This can be a simple radiant heater, but, as indicated in FIG. 2, heating rods 10a are preferably used, which are arranged in the focal line of reflectors 10b.
  • the reflectors 10b can be designed to be rotatable about the axes of the heating rods 10a.
  • This arrangement makes it possible to switch off the energy supply to the heating rods in the event of an interruption in operation and at the same time to rotate the reflectors by 180 °, so that the residual energy still stored in the heating rods is radiated against the housing walls and not against the wire shares 8a, 8b.
  • the energy supply to the wire coulters can be interrupted in the shortest possible time in the event of a fault.
  • the deflecting drum is composed of disc-shaped rotating bodies 15 which can be rotated relative to one another, each of which has self-contained wire guide grooves 6 on its circumference having.
  • the diameters of the disk-shaped rotary bodies 15 preferably increase along the drum axis, at least in the case of a drum 5, etc. in relation to the thermal and tensile expansion to be expected along the drum, preferably disproportionately.
  • the hubs 16 of the disk-shaped rotary body 15 are, according to FIGS. 3 and 4, rotatably supported by means of liners 17 with frictional engagement on a driven shaft 18, with the exception of the first disk-shaped rotary body 15A, which is connected in a rotationally fixed manner to the shaft 18.
  • the individual rotary bodies 15 can be designed according to FIG. 4 as spoke wheels with a thin wheel rim 20 which has the wire guide grooves 6 and which is connected to the wheel hub 16 by means of spokes 21, which are optionally designed as cooling vanes.
  • FIG. 5 and 6 show a further advantageous exemplary embodiment of the deflection drums 5 for the wire arranged in front of and behind a heating chamber 1, which is only indicated schematically.
  • different disc-shaped rotary bodies 31 and 32 are arranged alternately, which can be rotated relative to one another and which are driven by friction.
  • the diameters of the disk-shaped rotating bodies 31 advantageously increase step by step from a smallest to a largest value, whereas the disk-shaped rotating bodies 32 increase wegs have the same diameter, but which is larger than the largest diameter of the disc-shaped rotary body 31.
  • a wire 8 can now, initially starting from the bottom and progressing upwards, be looped around the two deflection drums 5 in such a way that it always loops around only the grooved, disc-shaped rotating bodies 31.
  • the wire reaches the uppermost disk-shaped rotating body 31 of a drum 5, it is guided to the uppermost disk-shaped rotating body 32 of the other drum 5, in order then to be returned to the plane in the descending direction, but now only touching the grooved disk-shaped rotating body 32 which he entered the device.
  • the wire sections wrapping around the rotating bodies 31 and the rotating bodies 32 cross each other without contact in space.
  • the resulting dwell time in the heating chamber doubles at the same throughput speed of the wire and, moreover, the inlet and outlet openings 11 in FIG. 2 come to lie in alignment in the housing 4. They can therefore both be formed by short slots extending from the base of the housing 4.

Description

Zum Wärmebehandeln, insbesondere Glühen, eines konti­nuierlich fortbewegten Metalldrahtes sind bereits verschie­dene Vorrichtungen bekannt bzw. vorgeschlagen worden, bei welchen eine relativ lange Verweilzeit des Drahtes im Wärmebehandlungsbereich bei relativ geringen Abmessungen der gesamten Vorrichtung dadurch erzielt wird, daß der Draht im Wärmebehandlungsbereich mit zahlreichen Windungen um zumindest einen trommelartigen Rotationskörper ge­schlungen wird, der motorisch in Drehung versetzt wird (vgl. DE-C-595 364 und bzw. die EP-A-263 093 und EP-A-275 864 der gleichen Anmelderin).Various devices have already been known or proposed for the heat treatment, in particular annealing, of a continuously moving metal wire, in which a relatively long dwell time of the wire in the heat treatment area is achieved with relatively small dimensions of the entire device in that the wire has numerous turns in the heat treatment area at least one drum-like rotating body is wound, which is set in rotation by a motor (cf. DE-C-595 364 and / or EP-A-263 093 and EP-A-275 864 by the same applicant).

Die Anordnung einer vom Draht umschlungenen Trommel unmittelbar im Wärmebehandlungsbereich bringt es mit sich, daß die Trommel selbst stark erhitzt wird und im Falle einer z.B. durch Verhedderung des von einer Haspel abgezogenen Drahtes verursachten Betriebsunterbrechung den Draht im Umschlingungsbereich selbst dann noch weiter aufheizt, wenn im übrigen die Temperatur im Wärmebehand­lungsbereich, etwa durch Abschaltung der Heizkörper und Öffnung eines die Trommel umschließenden Gehäuses, absinkt. Hiedurch ergibt sich die Gefahr, daß die betreffenden Abschnitte des Drahtes ausgeglüht und dadurch unbrauchbar werden.The arrangement of a drum wrapped in wire directly in the heat treatment area means that the drum itself is heated excessively and in the case of e.g. due to tangling of the interruption in the operation caused by the wire drawn off a reel, the wire in the looping area heats up even further when the temperature in the heat treatment area drops, for example by switching off the radiators and opening a housing enclosing the drum. This results in the risk that the relevant sections of the wire will anneal and become unusable.

Ein weiterer Nachteil der Anordnung einer vom Draht umschlungenen Trommel unmittelbar im Wärmebehandlungsbe­reich besteht darin, daß sich erhebliche Schwierigkeiten hinsichtlich der Lagerung der auf hoher Temperatur befind­lichen Trommel ergeben. Das ist insbesondere dann der Fall, wenn die Trommel aus später erläuterten Gründen gemäß dem Vorschlag in der älteren EP-A-275 864 der gleichen Anmelderin aus aneinandergereihten, gegeneinander drehbaren scheibenartigen Rotationskörpern zusammengesetzt wird.Another disadvantage of arranging a drum wrapped in wire directly in the heat treatment area is that there are considerable difficulties with regard to the storage of the drum which is at a high temperature. This is particularly the case if, for reasons explained later, the drum is assembled from lined-up, mutually rotatable disk-like rotating bodies in accordance with the proposal in older EP-A-275 864 by the same applicant.

Die Erfindung befaßt sich deshalb mit der Aufgabe, eine Wärmebehandlungsvorrichtung für einen kontinuierlich fortbewegten Draht so auszubilden, daß der Draht mit möglichst langer Verweilzeit durch einen Wärmebehandlungs­bereich mit mäßigen Abmessungen geführt werden kann, ohne daß dazu im Wärmebehandlungsbereich vom Draht umschlungene trommelartige Rotationskörper angeordnet werden müssen, die auf hohe Temperatur erhitzt werden und dadurch die vorstehend geschilderten Schwierigkeiten verursachen.The invention is therefore concerned with the task of a heat treatment device for a continuous form the advancing wire in such a way that the wire can be passed through a heat treatment area of moderate dimensions with the longest possible dwelling time without the need to arrange drum-like rotating bodies which are wrapped in the wire in the heat treatment area and which are heated to high temperature and thereby cause the difficulties described above.

Diese Aufgabe wird bei einer erfindungsgemäßen Wärme­behandlungsvorrichtung dadurch gelöst, daß zwischen zwei mit Abstand voneinander achsparallel und drehbar gelagerten Umlenktrommeln, die an ihrer Mantelfläche in sich ge­schlossene Drahtführungsrillen aufweisen, eine im wesent­lichen allseits geschlossene Heizkammer angeordnet ist, deren Wandung in den Schnittbereichen mit den gemeinsamen äußeren Tangentialebenen an die beiden Umlenktrommeln Ein- und Austrittsöffnungen für den mit einer Vielzahl von nebeneinanderliegenden Windungen um die beiden Umlenk­trommeln zu schlingenden Draht aufweist, wobei zumindest eine der beiden Umlenktrommeln motorisch antreibbar ist und in der Heizkammer längs der sie hin- und rückläufig durchsetzenden beiden Scharen von Drahtabschnitten Heiz­körper angeordnet sind.This object is achieved in a heat treatment device according to the invention in that an essentially all-round heating chamber is arranged between two mutually axially parallel and rotatably mounted deflection drums which have self-contained wire guide grooves on their outer surface, the wall of which in the intersection areas with the common outer ones Tangential planes on the two deflection drums has inlet and outlet openings for the wire to be looped around the two deflection drums with a plurality of turns lying next to one another, at least one of the two deflection drums being motor-driven and in the heating chamber along the two groups of them traversing back and forth Wire sections radiators are arranged.

Bei dieser Vorrichtung befinden sich die vom Draht umschlungenen Trommeln außerhalb der Heizkammer und sie werden nur durch den Kontakt mit dem erhitzten Draht erwärmt, also wesentlich weniger als bei den älteren Vorrichtungen, wodurch auch die im Falle einer Betriebs­unterbrechung von jeder Trommel an den Draht zurückgegebene Wärme wesentlich geringer ist und überdies Probleme bezüglich der Lagerung der Trommeln entfallen.In this device, the drums wrapped in the wire are outside the heating chamber and they are heated only by contact with the heated wire, i.e. considerably less than in the older devices, which also results in the heat returned to the wire by each drum in the event of a break in operation is significantly less and, moreover, problems with regard to the storage of the drums are eliminated.

Bei einem bevorzugten Ausführungsbeispiel wird die Heizkammer durch eine Basisplatte und ein von dieser abhebbares langgestrecktes haubenartiges Gehäuse gebildet, das an seinen beiden Schmalseiten von der Basis des Gehäuses ausgehende, zu den Achsen der Umlenkrollen parallele Schlitze als Ein- bzw. Austrittsöffnungen für die beiden Scharen von Drahtabschnitten aufweist und innen an seinen beiden Langseiten die Heizkörper trägt. Das hauben­ artige Gehäuse kann dann leicht abgehoben werden, um einerseits die Vorrichtung bei der erstmaligen Inbetrieb­nahme durch Umschlingung der Trommeln mit Draht zu beschicken und anderseits im alle einer Betriebsunter­brechung die Heizkörper aus dem Einwirkungsbereich auf den Draht zu entfernen.In a preferred embodiment, the heating chamber is formed by a base plate and an elongated hood-like housing which can be lifted off the latter and has slots on its two narrow sides, starting from the base of the housing and parallel to the axes of the deflecting rollers, as entry and exit openings for the two groups of Has wire sections and carries the radiator inside on its two long sides. The hood Like housing can then be easily lifted, on the one hand to load the device with the wire during the first start-up by wrapping the drums and on the other hand to remove the radiator from the area affected by the wire in all of a business interruption.

Um sowohl während der betriebsmäßigen Aufheizung als auch während einer allfälligen Abkühlung des Drahtes nach einer Betriebsunterbrechung Wärmedehnungen und Schrumpfun­gen des Drahtes unter Beibehaltung des Kontaktes zwischen dem Draht und der starren Trommel zu ermöglichen, sind vorteilhaft gemäß dem bereits erwähnten älteren Vorschlag der Anmelderin die Umlenktrommeln aus gegeneinander dreh­baren, scheibenförmigen Rotationskörpern zusammengesetzt, von denen jeder an seinem Umfang in sich geschlossene Drahtführungsrillen aufweist. Die scheibenförmigen Rota­tionskörper können sich dann mit Reibung gegeneinander­drehen und dadurch wirkungsmäßig den Umschlingungswinkel ändern. Besonders vorteilhaft ist es, wenn die Durchmesser der scheibenförmigen Rotationskörper längs zumindest einer der Trommelachsen zunehmen, u.zw. im Verhältnis zu der längs der Trommel zu erwartenden Wärmedehnung des Drahtes vorzugsweise überproportional. Dadurch wird im Betrieb trotz Erhitzung des Drahtes und hiedurch verursachter Wärmedehnung eine satte Anlage des Drahtes am Trommelmantel gesichert.In order to enable thermal expansion and shrinkage of the wire while maintaining contact between the wire and the rigid drum, both during operational heating and during a possible cooling of the wire after an interruption of operation, the deflection drums are advantageous according to the previously mentioned older proposal by the applicant rotatable, disc-shaped bodies of rotation, each of which has self-contained wire guide grooves on its circumference. The disk-shaped rotating bodies can then rotate against one another with friction and thereby effectively change the wrap angle. It is particularly advantageous if the diameters of the disk-shaped rotating bodies increase along at least one of the drum axes, etc. in relation to the thermal expansion of the wire to be expected along the drum, preferably disproportionately. This ensures that the wire remains firmly in contact with the drum jacket in spite of the wire being heated and the thermal expansion caused by it.

Weitere Merkmale und Vorteile der Erfindung gehen aus der folgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung hervor. In diesen zeigen:

  • die Fig. 1 und 2 einen Vertikalschnitt bzw. einen Horizontalschnitt durch ein erstes Ausführungsbeispiel,
  • Fig. 3 eine bevorzugte Ausführungsform einer Umlenk­trommel im Achsschnitt,
  • Fig. 4 eine Draufsicht auf einen der scheibenförmigen Rotationskörper, aus welchen die Umlenktrommel nach Fig. 3 zusammengesetzt ist, und
  • die Fig. 4 und 5 eine vorteilhafte weitere Ausbildung einer erfindungsgemäßen Vorrichtung im Vertikalschnitt bzw. in Draufsicht bei abgehobenem Gehäuse.
Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the drawing. In these show:
  • 1 and 2 a vertical section and a horizontal section through a first embodiment,
  • 3 shows a preferred embodiment of a deflection drum in axial section,
  • Fig. 4 is a plan view of one of the disc-shaped rotary bodies from which the deflection drum according to Fig. 3 is composed, and
  • 4 and 5 an advantageous further training a device according to the invention in vertical section or in plan view with the housing lifted.

Die Vorrichtung nach den Fig. 1 und 2 hat ein von einer Basisplatte 3 und einem abhebbaren haubenartigen Gehäuse 4 aus wärmedämpfendem Material gebildete Heizkammer 1, der zweckmäßig Aufnahmekammern 2 für die erfindungsgemäß außerhalb der Heizkammer 1 angeordneten Umlenktrommeln 5 vor- und nachgeordnet sind. In den beiden Gehäusewänden, welche sich an den Schmalseiten der langgestreckten Heizkammer 1 befinden, sind in den Schnittbereichen mit den gemeinsamen äußeren Tangentialebenen an die beiden Umlenk­trommeln 5 zu den Achsen der Umlenktrommeln parallele Schlitze 9 ausgebildet, die von der Basis des Gehäuses ausgehen und aus Ein- und Austrittsöffnungen der Kammer 1 für die hin- und rückläufigen Drahtscharen 8a und 8b dienen, welche sich durch die Umschlingung der beiden Umlenktrommeln 5 mit einer Vielzahl von Windungen des Drahtes 8 ergeben. Die Ausbildung dieser Ein- und Aus­trittsöffnungen durch von der Gehäusebasis ausgehende Schlitze ermöglicht ein Abheben und Aufsetzen des hauben­artigen Gehäuses 4 bei betriebsmäßiger Anordnung des Drahtes 8 an den Umlenktrommeln 5 und im Bereich der Kammer 1.The device according to FIGS. 1 and 2 has a heating chamber 1 formed by a base plate 3 and a hood-like housing 4 which can be lifted off and which is expediently arranged upstream and downstream of the deflection drums 5 arranged outside the heating chamber 1. In the two housing walls, which are located on the narrow sides of the elongated heating chamber 1, slots 9 are formed in the intersection areas with the common outer tangential planes on the two deflection drums 5 to the axes of the deflection drums, starting from the base of the housing and from on - And exit openings of the chamber 1 for the back and forth wire coulters 8a and 8b serve, which result from the wrapping of the two deflection drums 5 with a plurality of turns of the wire 8. The formation of these inlet and outlet openings by slots extending from the housing base enables the hood-like housing 4 to be lifted off and put on when the wire 8 is operationally arranged on the deflection drums 5 and in the region of the chamber 1.

Um gegebenenfalls den Raum unter dem haubenartigen Gehäuse 4 in an sich bekannter Weise mit Schutzgas füllen zu können, können in der Basisplatte 3 (nicht dargestellte) Bohrungen vorgesehen sein. Die gesamte Vorrichtung kann überdies von einer größeren, mit Schutzgas gefüllten Haube umgeben sein, damit sich der Draht bei einer Betriebsunter­brechung nach Abheben des haubenartigen Gehäuses 4 noch in einer ausreichenden Schutzgasatmosphäre abkühlt.In order to be able to fill the space under the hood-like housing 4 with protective gas in a manner known per se, holes (not shown) can be provided in the base plate 3. The entire device can moreover be surrounded by a larger hood filled with protective gas, so that the wire cools down in an adequate protective gas atmosphere when the hood-like housing 4 is lifted in the event of an interruption in operation.

Eine der Aufnahmekammern 2 für die Umlenktrommeln 5 weist entsprechend der Drahtführung im Inneren der Wärmebe­handlungsvorrichtung angeordnete Ein- und Austritts­öffnungen 11 für den kontinuierlich durchlaufenden Draht 8 auf. Es ist auch möglich, in einer der Kammern 2 die Eintrittsöffnung und in der anderen Kammer 2 die Austritts­öffnung für den Draht vorzusehen.One of the receiving chambers 2 for the deflection drums 5 has inlet and outlet openings 11 for the continuously running wire 8, which are arranged in the interior of the heat treatment device in accordance with the wire guide. It is also possible to provide the inlet opening in one of the chambers 2 and the outlet opening for the wire in the other chamber 2.

Im einfachsten Fall können die Umlenktrommeln 5 zylindrische Walzen sein, die an ihrer Mantelfläche in sich geschlossene Drahtführungsrillen 6 aufweisen, deren Tiefe so groß bemessen ist, daß der von ihnen aufgenommene Draht 8 auch bei der eintretenden Wärmedehnung nicht aus den Rillen herausfallen kann. Eine nicht dargestellte, der Wärmebehandlungsvorrichtung nachgeschaltete Drahtabzugvor­richtung kann bei dieser Ausführungsform den Draht so weit unter Zugspannung halten, daß er trotz Dehnung bei seiner Erwärmung in Anlage an den Trommeln 5 gehalten wird.In the simplest case, the deflection drums 5 can be cylindrical rollers, which have self-contained wire guide grooves 6 on their outer surface, the depth of which is so large that the wire 8 they accommodate cannot fall out of the grooves even when thermal expansion occurs. A wire take-off device, not shown, downstream of the heat treatment device, can hold the wire under tension so far in this embodiment that it is held in contact with the drums 5 despite stretching when it is heated.

Zumindest eine der Trommeln 5 kann von einem Motor 12 angetrieben werden und beide Trommeln können, wie in Fig. 1 dargestellt, gegebenenfalls auch mittels Kettenrädern 13 und einer Kette 14 auf gemeinsame Drehung verbunden sein.At least one of the drums 5 can be driven by a motor 12 and, as shown in FIG. 1, both drums can optionally also be connected to one another by means of chain wheels 13 and a chain 14.

Beiderseits der Bewegungsbahn der die Heizkammer 1 durchsetzenden Drahtscharen 8a und 8b sind Reihen von Heizkörpern 10 an den Kammerwänden angebracht. Es ist aber auch möglich, nur eine Reihe von Heizkörpern, entweder seitlich oder in der Mitte zwischen den Bewegungsbahnen der beiden Drahtscharen 8a und 8b, vorzusehen. Hiebei kann es sich um einfache Strahlungsheizkörper handeln, bevorzugt werden jedoch, wie in Fig. 2 angedeutet, Heizstäbe 10a verwendet, welche in der Brennlinie von Reflektoren 10b angeordnet sind. Die Reflektoren 10b können um die Achsen der Heizstäbe 10a drehbar ausgebildet sein. Diese Anordnung gestattet es, im Falle einer Betriebsunterbrechung die Energiezufuhr zu den Heizstäben abzuschalten und gleich­zeitig die Reflektoren um 180° zu drehen, so daß die noch in den Heizstäben gespeicherte Restenergie gegen die Gehäusewände und nicht gegen die Drahtscharen 8a, 8b abgestrahlt wird. Die Energiezufuhr zu den Drahtscharen kann auf diese Weise im Störungsfall innerhalb kürzester Zeit unterbrochen werden.Rows of radiators 10 are attached to the chamber walls on both sides of the movement path of the wire shares 8a and 8b passing through the heating chamber 1. However, it is also possible to provide only one row of radiators, either laterally or in the middle between the movement paths of the two wire shares 8a and 8b. This can be a simple radiant heater, but, as indicated in FIG. 2, heating rods 10a are preferably used, which are arranged in the focal line of reflectors 10b. The reflectors 10b can be designed to be rotatable about the axes of the heating rods 10a. This arrangement makes it possible to switch off the energy supply to the heating rods in the event of an interruption in operation and at the same time to rotate the reflectors by 180 °, so that the residual energy still stored in the heating rods is radiated against the housing walls and not against the wire shares 8a, 8b. The energy supply to the wire coulters can be interrupted in the shortest possible time in the event of a fault.

Die Fig. 3 und 4 erläutern einen vorteilhaften Aufbau der Umlenktrommeln 5. Gemäß Fig. 3 ist nämlich die Umlenk­trommel aus gegeneinander drehbaren, scheibenförmigen Rotationskörpern 15 zusammengesetzt, von denen jeder an seinem Umfang in sich geschlossene Drahtführungsrillen 6 aufweist. die Durchmesser der scheibenförmigen Rotations­körper 15 nehmen vorzugsweise zumindest bei einer Trommel 5 längs der Trommelachse zu, u.zw. im Verhältnis zu der längs der Trommel zu erwartenden Wärme- und Zugdehnung vorzugs­weise überproportional.3 and 4 explain an advantageous construction of the deflecting drums 5. According to FIG. 3, the deflecting drum is composed of disc-shaped rotating bodies 15 which can be rotated relative to one another, each of which has self-contained wire guide grooves 6 on its circumference having. the diameters of the disk-shaped rotary bodies 15 preferably increase along the drum axis, at least in the case of a drum 5, etc. in relation to the thermal and tensile expansion to be expected along the drum, preferably disproportionately.

Die Naben 16 der scheibenförmigen Rotationskörper 15 sind gemäß den Fig. 3 und 4 mittels Laufbüchsen 17 drehbar mit Reibungsschluß auf einer angetriebenen Welle 18 gelagert, mit Ausnahme des ersten scheibenförmigen Rota­tionskörpers 15A, der drehfest mit der Welle 18 verbunden ist.The hubs 16 of the disk-shaped rotary body 15 are, according to FIGS. 3 and 4, rotatably supported by means of liners 17 with frictional engagement on a driven shaft 18, with the exception of the first disk-shaped rotary body 15A, which is connected in a rotationally fixed manner to the shaft 18.

Wenn die Welle 18 vom Motor 12 in Fig. 1 angetrieben wird, ergibt diese Anordnung, daß bei gleicher Winkelge­schwindigkeit aller scheibenförmigen Rotationskörper die Umfangsgeschwindigkeit in Richtung der Trommelachse zu­nimmt. Dadurch wird der sich während seines Durchlaufes durch die vorrichtung allmählich erwärmende Draht stets in Anlage an den Drahtführungsrillen 6 der von ihm teilweise umschlungenen Trommel 5 gehalten, weil die aufeinander­folgenden Scheiben die Tendenz haben, den Draht schneller mitzunehmen, und diesen daher unter Spannung setzen.If the shaft 18 is driven by the motor 12 in FIG. 1, this arrangement results in that the circumferential speed increases in the direction of the drum axis with the same angular speed of all disk-shaped rotating bodies. As a result, the wire, which gradually heats up during its passage through the device, is always held in contact with the wire guide grooves 6 of the drum 5 which it partially wraps around, because the successive disks have a tendency to take the wire more quickly and therefore put it under tension.

Um das Wärmespeichervermögen der einzelnen Rotations­körper 15 so gering wie möglich zu halten, können diese gemäß Fig. 4 als Speichenräder mit einem dünnen, die Drahtführungsrillen 6 aufweisenden Radkranz 20 ausgebildet werden, der durch gegebenenfalls als Kühlflügel ausgebilde­te Speichen 21 mit der Radnabe 16 verbunden ist.In order to keep the heat storage capacity of the individual rotary bodies 15 as low as possible, they can be designed according to FIG. 4 as spoke wheels with a thin wheel rim 20 which has the wire guide grooves 6 and which is connected to the wheel hub 16 by means of spokes 21, which are optionally designed as cooling vanes.

Die Fig. 5 und 6 zeigen ein weiteres vorteilhaftes Ausführungsbeispiel der vor und hinter einer nur schema­tisch angedeuteten Heizkammer 1 angeordneten Umlenktrommeln 5 für den Draht. Auf den Antriebswellen 18 dieser beiden Trommeln sind abwechselnd unterschiedliche scheibenförmige Rotationskörper 31 und 32 angeordnet, die gegeneinander drehbar sind und die durch Reibung angetrieben werden. Die Durchmesser der scheibenförmigen Rotationskörper 31 nehmen, wie beim Ausführungsbeispiel nach Fig. 3, vorteilhaft schrittweise von einem kleinsten bis zu einem größten Wert zu, wogegen die scheibenförmigen Rotationskörper 32 durch­ wegs gleiche Durchmesser haben, der jedoch größer als der größte Durchmesser der scheibenförmigen Rotationskörper 31 ist.5 and 6 show a further advantageous exemplary embodiment of the deflection drums 5 for the wire arranged in front of and behind a heating chamber 1, which is only indicated schematically. On the drive shafts 18 of these two drums, different disc-shaped rotary bodies 31 and 32 are arranged alternately, which can be rotated relative to one another and which are driven by friction. As in the exemplary embodiment according to FIG. 3, the diameters of the disk-shaped rotating bodies 31 advantageously increase step by step from a smallest to a largest value, whereas the disk-shaped rotating bodies 32 increase wegs have the same diameter, but which is larger than the largest diameter of the disc-shaped rotary body 31.

Ein Draht 8 kann nun, zunächst von unten beginnend und nach oben fortschrietend, so um die beiden Umlenktrommeln 5 geschlungen werden, daß er stets nur die gerillten scheibenförmigen Rotationskörper 31 umschlingt. Sobald der Draht den obersten scheibenförmigen Rotationskörper 31 einer Trommel 5 erreicht, wird er zum obersten scheiben­förmigen Rotationskörper 32 der anderen Trommel 5 geführt, um sodann in absteigender Richtung, jetzt jedoch nur die gerillten scheibenförmigen Rotationskörper 32 berührend, in die Ebene zurückgeführt zu werden, in welcher er in die Vorrichtung eingetreten ist. Dabei kreuzen einander die die Rotationskörper 31 und die die Rotationskörper 32 um­schlingenden Drahtabschnitte berührungsfrei im Raum.A wire 8 can now, initially starting from the bottom and progressing upwards, be looped around the two deflection drums 5 in such a way that it always loops around only the grooved, disc-shaped rotating bodies 31. As soon as the wire reaches the uppermost disk-shaped rotating body 31 of a drum 5, it is guided to the uppermost disk-shaped rotating body 32 of the other drum 5, in order then to be returned to the plane in the descending direction, but now only touching the grooved disk-shaped rotating body 32 which he entered the device. In this case, the wire sections wrapping around the rotating bodies 31 and the rotating bodies 32 cross each other without contact in space.

Durch diese Anordnung verdoppelt sich bei gleicher Durchlaufgeschwindigkeit des Drahtes die resultierende Verweilzeit in der Heizkammer und überdies kommen die Ein- und Austrittsöffnungen 11 in Fig. 2 im Gehäuse 4 in einer Flucht zu liegen. Sie können daher beide durch von der Basis des Gehäuses 4 ausgehende kurze Schlitze gebildet werden.As a result of this arrangement, the resulting dwell time in the heating chamber doubles at the same throughput speed of the wire and, moreover, the inlet and outlet openings 11 in FIG. 2 come to lie in alignment in the housing 4. They can therefore both be formed by short slots extending from the base of the housing 4.

Claims (9)

1. Apparatus for heat-treating, in particular annealing, a continuously moving metal wire, in which apparatus a heating chamber (1) which is essentially closed on all sides is arranged between two deflection drums (5) which are mounted spaced apart, parallel to the axis and rotatably and which have on their jacket surface in­dividually closed wire guide grooves (6), the wall of which heating chamber has in the intersect regions with the common outer tangential planes on to the two deflec­tion drums (5) inlet and outlet openings (9) for the wire (8) to be wound around the two deflection drums (5) with a multitude of adjacent windings, it being possible for at least one of the two deflection drums (5) to be motor­driven and heating units (10) being arranged in the heating chamber (1) along the two groups (8a, 8b) of wire portions penetrating said heating chamber forwards and rearwards.
2. Apparatus according to Claim 1, characterized in that the heating chamber (1) is formed by a base plate (3) and an elongated, hood-type housing (4) which can be detached from said base plate, has on its two narrow sides slots (9) parallel to the axes of the deflection rolls starting from the base of the housing (4) as inlet and outlet openings for the two groups (8a, 8b) of wire portions, and bears the heating units (10) on the inside on its two longitudinal sides.
3. Apparatus according to Claim 1, characterized in that accommodation chambers (2), which are essentially closed on all sides, for the two deflection drums (5) are provided on both sides of the heating chamber (1), it being possible for the inlet and outlet openings (11) of the wire (8) to be formed together on one of the two accommodation chambers (2) or to be distributed between these two chambers (2).
4. Apparatus according to Claims 2 and 3, characterized in that the detachable hood-type housing (4) forming the heating chamber (1) over the base plate (3) is construct­ed in one piece with housing parts forming the accommoda­tion chambers (2) for the deflection drums (5) in inter­action with the base plate.
5. Apparatus according to one of Claims 1 to 4, charac­terized in that the deflection drums (5) are compiled of essentially disc-shaped rotation bodies (15) which can be rotated counter to one another, each of which has on its circumference individually closed wire guide grooves (6).
6. Apparatus according to Claim 5, characterized in that the diameters of the disc-shaped rotation bodies (15) increase along the axis of at least one drum (5), to be precise preferably overproportionally in relation to the expansion of the wire (8) to be expected along the drum.
7. Apparatus according to Claim 5 or 6, characterized in that each deflection drum (5) has in the axial direction disc-shaped rotation bodies (31, 32) of alternatingly smaller and larger diameter such that the wire (8) can be guided firstly from one end of the two drums (5) to the other end whilst wrapping the smaller or larger disc-type rotation bodies (31 or 32) and can then be returned to the first end of the two drums (5) whilst wrapping the respective other disc-shaped rotation bodies (32 or 31).
8. Apparatus according to one of claims 1 to 7, charac­terized in that the heating units (10) are formed by heating bars (10a) with reflectors (10b), it being possible for the reflectors (10b) to be swivelled between a position directing the heat radiation against the movement path of the two groups (8a, 8b) of wire and a position shielding these groups of wire from the heat radiation.
9. Apparatus according to one of claims 1 to 8, characterized in that the heating chamber (1) and, if appropriate, also the accommodation chambers (2) for the deflection drums (5) are filled with protective gas.
EP88890005A 1987-01-19 1988-01-12 Apparatus for heat-treating (in particular annealing) a continuously moving metal wire Expired - Lifetime EP0277109B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0008387A AT389323B (en) 1987-01-19 1987-01-19 DEVICE FOR HEAT TREATMENT, IN PARTICULAR GLOWING, OF A CONTINUOUSLY PROGRESSIVE METAL WIRE
AT83/87 1987-01-19

Publications (2)

Publication Number Publication Date
EP0277109A1 EP0277109A1 (en) 1988-08-03
EP0277109B1 true EP0277109B1 (en) 1991-03-06

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Application Number Title Priority Date Filing Date
EP88890005A Expired - Lifetime EP0277109B1 (en) 1987-01-19 1988-01-12 Apparatus for heat-treating (in particular annealing) a continuously moving metal wire

Country Status (7)

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US (1) US4860999A (en)
EP (1) EP0277109B1 (en)
JP (1) JPS63199827A (en)
AT (1) AT389323B (en)
DE (1) DE3861861D1 (en)
ES (1) ES2003078B3 (en)
GR (2) GR880300126T1 (en)

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DE4412433B4 (en) * 1994-04-12 2006-01-19 Michael Hörauf Maschinenfabrik GmbH & Co KG Device for transporting yarn with a winding mast
JP2905431B2 (en) * 1995-09-07 1999-06-14 三ツ星ベルト株式会社 Code dip processing machine
US20070095006A1 (en) * 2005-11-01 2007-05-03 Konersmann Ronald D Lightweight portable concrete enclosure and associated method of construction
US7832250B2 (en) * 2008-04-18 2010-11-16 L&P Property Management Company Method and apparatus for automating production of sinuous springs
AT507423B1 (en) * 2009-03-25 2010-05-15 Ebner Ind Ofenbau PROCESS FOR PREHEATING GLOWING IN A BROWN GLOW SYSTEM
CN112126770B (en) * 2020-10-16 2022-02-01 江西远桥电磁线科技协同创新有限公司 Copper wire annealing device

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Also Published As

Publication number Publication date
EP0277109A1 (en) 1988-08-03
GR3001606T3 (en) 1992-11-23
GR880300126T1 (en) 1988-12-16
ES2003078B3 (en) 1991-11-01
DE3861861D1 (en) 1991-04-11
JPS63199827A (en) 1988-08-18
ATA8387A (en) 1989-04-15
AT389323B (en) 1989-11-27
US4860999A (en) 1989-08-29
ES2003078A4 (en) 1988-10-16

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