EP0101661B1 - Internally cooled supporting and/or conveying roll and process for manufacturing this roll - Google Patents

Internally cooled supporting and/or conveying roll and process for manufacturing this roll Download PDF

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Publication number
EP0101661B1
EP0101661B1 EP83730069A EP83730069A EP0101661B1 EP 0101661 B1 EP0101661 B1 EP 0101661B1 EP 83730069 A EP83730069 A EP 83730069A EP 83730069 A EP83730069 A EP 83730069A EP 0101661 B1 EP0101661 B1 EP 0101661B1
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EP
European Patent Office
Prior art keywords
core
sleeve
cross
cooling medium
internally cooled
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
Application number
EP83730069A
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German (de)
French (fr)
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EP0101661A1 (en
Inventor
Karl-Friedrich Wesemann
Rainer Lenk
Klaus Ing. Grad Kobusch
Manfred Dipl. Ing. Markan
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Vodafone GmbH
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Mannesmann AG
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Priority to AT83730069T priority Critical patent/ATE26078T1/en
Publication of EP0101661A1 publication Critical patent/EP0101661A1/en
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Publication of EP0101661B1 publication Critical patent/EP0101661B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/08—Lubricating, cooling or heating rolls internally
    • B21B2027/083—Lubricating, cooling or heating rolls internally cooling internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/008—Rollers for roller conveyors

Definitions

  • the invention relates to an internally cooled support and / or transport roller according to the preamble of patent claim 1.
  • Internally cooled rolls for supporting and / or transporting hot metal bodies, in particular steel strands produced in continuous casting processes, are known (cf. DE-A-2 408 769 and the generic DE-A-1 583 619). They usually consist of a core, in the surface of which one or more channels are incorporated. The channels merge into radial bores which open into axially directed bores arranged in the bearing journals. The latter are used for coolant supply and removal.
  • the core of the roller is surrounded by a sleeve which is shrunk onto the core and closes the cooling channel or the cooling channels of the core to the outside.
  • the roller When the roller is pressed onto the strand, which is hot up to 1200 ° C, the roller is subjected to considerable mechanical and thermal loads, which lead to deflection and warping. With regard to the sleeve, it can be noted that it partially detaches from the core under the loads mentioned during operation and then the cooling medium is no longer positively guided. The result is reduced cooling at the highly stressed line of contact with the strand. In addition, the mechanical stability is affected by this process.
  • the invention has for its object to eliminate the disadvantages mentioned and to provide a roller which has an improved bending stiffness, is thermally stable, also in relation to the cooling effect to be exerted on the strand, and to specify a method for producing such a roller.
  • Thermally stable is also to be understood as the case that the operability of the roller is not impaired in the event of occasionally increased one-sided heat application.
  • a method according to the invention for producing such a roller includes claim 11.
  • a roller 1 is provided with a helical coolant channel 2, which is connected to concentric bores 3 arranged in the bearing journal 4 as coolant inflow or outflow via radial bores 5.
  • the individual turns of the coolant channel 2 are separated from one another by the web 6, so that there is a positive guide for the cooling medium in the entire roller 1.
  • the forced guidance is achieved, as shown in FIGS. 2 to 6, by a coolant-tight connection of the webs 6 of the core 7 with a sleeve 8 applied to the core 7.
  • the coolant-tight connection and the fixing of the sleeve 8 relative to the core 7 can be achieved in that the web 6 is trapezoidal thread-shaped and engages in a corresponding recess 9 on the inner surface 10 of the sleeve 8.
  • a groove 12 is incorporated in the end face 11 of the web 6, into which a seal 13 of circular cross section is inserted.
  • the sleeve 8 is screwed onto the core 7, the pitch of the thread being self-locking. At the ends, the sleeve 8 is expediently welded to the core 7.
  • the end face 11 of the web 6 itself is provided with a thread which is connected to a corresponding thread in the inner lateral surface 10 of the sleeve 8.
  • the end face 11 of the web 6 is permanently and tightly connected to the inner lateral surface 10 of the sleeve 8 by a pressure welding.
  • Pressure welding is understood to mean resistance welding, such as spot welding or roll seam welding. It is of course also possible to cover the coolant channels 2 with appropriate tapes and to weld the tape edges 14 according to FIG. 5, including the end face 11 of the webs 6.
  • the band forming the sleeve 8 in the welded state for covering the coolant channels 2 is obtained from a tube with the dimensions of the desired sleeve, in which the tube is separated or strips of material from the tube wall in accordance with the course of the webs are cut out in such a way that the remaining cut edges slightly cover the webs 6, leaving a gap for the weld seam which connects the cut edges 14 to the web 6.
  • the coolant channel 2 in such a way that it has a large cross-section with a small cross-sectional area and the side the cross-sectional area with the greatest length extension is formed by the inner lateral surface 10 of the sleeve 8, for example by rectangular design of the cross-sectional area of the coolant channel 2 (FIG. 6) or, as shown in FIG. 7, by a trapezoidal cross section.
  • the inner lateral surface 10 of the sleeve 8 a notch-effective, stress-reducing and surface-increasing shape near the connection points with the web 6, for example, as shown in FIGS. 2 to 5 and 7, by means of semicircular recesses 19.
  • This shape also improves the cooling effect.
  • the ratio of the radius r of the core to the radius of the radius a reduced by the coolant channel 2 is 1: 0.9.
  • This method according to the invention is of course not limited to the example described for the production of an internally cooled roll. It can be used wherever weldable metal parts are only to be connected in parts of their surface, for example in the construction of apparatus or containers. Sub-areas of their surface are understood to mean cases in which flat bodies overlap with their larger surface portion, but only touch in sub-areas, so that inaccessible welding areas arise.
  • a roller is obtained which, for a given outer diameter, has the largest possible core diameter with the smallest sleeve thickness. It therefore has a large section modulus.
  • the thermal load on the roll is reduced to a small part, namely the jacket.
  • the large section modulus of the roller, including the sleeve ensures that the roller remains free of distortion even if the sleeve surface is heated on one side for a long time.
  • the effective cooling system supports the roller in its functions with a low wall thickness of the sleeve, a controlled water flow, a high speed of the cooling medium and a large cooling surface.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Continuous Casting (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)

Abstract

A roll for the support and transport of ingots is disclosed including a core with a helical duct along the periphery covered by a thin sleeve being secured to the groove or duct separating ridges by welding making sure that coolant cannot flow transverse to the duct and that the sleeve cannot slip off the core. A particular welding technique as employed has broader applications including joining plate or sheet stock.

Description

Die Erfindung betrifft eine innengekühlte Stütz-und/oder Transportwalze gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an internally cooled support and / or transport roller according to the preamble of patent claim 1.

Innengekühlte Walzen zum Stützen und/oder Transportieren von heißen Metallkörpern, insbesondere von in kontinuierlichen Gießverfahren erzeugten Stahlsträngen sind bekannt (vgl. DE-A-2 408 769 sowie die gattungsbildende DE-A-1 583 619). Sie bestehen üblicherweise aus einem Kern, in dessen Oberfläche ein oder mehrere Kanäle eingearbeitet sind. Die Kanäle gehen in radiale Bohrungen über, die in axial gerichteten, in den Lagerzapfen angeordneten Bohrungen münden. Letztere dienen der Kühlmittelzu- bzw. -abfuhr. Der Kern der Walze ist von einer Hülse umgeben, die auf den Kern aufgeschrumpft ist und den Kühlkanal bzw. die Kühlkanäle des Kernes nach außen abschließt.Internally cooled rolls for supporting and / or transporting hot metal bodies, in particular steel strands produced in continuous casting processes, are known (cf. DE-A-2 408 769 and the generic DE-A-1 583 619). They usually consist of a core, in the surface of which one or more channels are incorporated. The channels merge into radial bores which open into axially directed bores arranged in the bearing journals. The latter are used for coolant supply and removal. The core of the roller is surrounded by a sleeve which is shrunk onto the core and closes the cooling channel or the cooling channels of the core to the outside.

Beim Anpressen der Walze zum Zweck der Abstützung an den bis zu 1 200 °C heißen Strang wird die Walze erheblichen mechanischen und thermischen Belastungen unterworfen, die zur Durchbiegung und zum Verzug führen. Hinsichtlich der Hülse ist zu verzeichnen, daß diese sich unter den genannten Belastungen während des Betriebes vom Kern teilweise löst und dann eine Zwangsführung des Kühlmediums nicht mehr gegeben ist. Das Ergebnis ist eine verminderte Kühlung an der hochbelasteten Kontaktlinie zum Strang. Außerdem wir die mechanische Stabilität durch diesen Vorgang beeinträchtigt.When the roller is pressed onto the strand, which is hot up to 1200 ° C, the roller is subjected to considerable mechanical and thermal loads, which lead to deflection and warping. With regard to the sleeve, it can be noted that it partially detaches from the core under the loads mentioned during operation and then the cooling medium is no longer positively guided. The result is reduced cooling at the highly stressed line of contact with the strand. In addition, the mechanical stability is affected by this process.

Der Erfindung liegt die Aufgabe zugrunde, die genannten Nachteile zu beseitigen und eine Walze zu schaffen, die eine verbesserte Biegesteifigkeit aufweist, thermisch stabil ist, auch in bezug auf die auf den Strang auszuübenden Kühlwirkung sowie ein Verfahren zur Herstellung einer derartigen Walze anzugeben. Unter thermisch stabil wird auch der Fall verstanden, daß bei zeitweiser verstärkter einseitiger Wärmebeaufschlagung die Betriebsfähigkeit der Walze nicht beeinträchtigt wird.The invention has for its object to eliminate the disadvantages mentioned and to provide a roller which has an improved bending stiffness, is thermally stable, also in relation to the cooling effect to be exerted on the strand, and to specify a method for producing such a roller. Thermally stable is also to be understood as the case that the operability of the roller is not impaired in the event of occasionally increased one-sided heat application.

Die Aufgabe wird gelöst durch eine Walze, wie durch die Merkmale der Ansprüche 1, 2, 3 dargestellt. Weitere vorteilhafte, die Erfindung weiterbildende Maßnahmen sind in den Unteransprüchen beschrieben. Ein erfindungsgemäßes Verfahren zur Herstellung einer derartigen Walze beinhaltet Anspruch 11.The object is achieved by a roller, as represented by the features of claims 1, 2, 3. Further advantageous measures that further develop the invention are described in the subclaims. A method according to the invention for producing such a roller includes claim 11.

Die Erfindung soll anhand der schematischen Darstellung in den Zeichnungen beschrieben werden.The invention will be described with reference to the schematic representation in the drawings.

Es zeigen :

  • Figur 1 eine Walze in perspektivischer Darstellung,
  • Figuren 2 bis 6 ausschnittsweise Vergrößerungen der Verbindungsstelle zwischen Kern und Hülse und
  • Figur7 eine vergrößerte Darstellung eines Kühlmittelkanals einer längsgeschnitten Walze.
Show it :
  • FIG. 1 shows a roller in perspective,
  • Figures 2 to 6 enlarged sections of the connection between the core and sleeve and
  • Figure 7 is an enlarged view of a coolant channel of a longitudinally cut roller.

Gemäß Fig. 1 ist eine Walze 1 mit einem schraubenlinienförmigen Kühlmittelkanal 2 versehen, der mit in den Lagerzapfen 4 angeordneten konzentrischen Bohrungen 3 als Kühlmittelzu- oder -abfluß über radiale Bohrungen 5 verbunden ist. Die einzelnen Windungen des Kühlmittelkanals 2 sind durch den Steg 6 voneinander getrennt, so daß in der gesamten Walze 1 eine Zwangsführung für das Kühlmedium besteht. Die Zwangsführung wird erreicht, wie in den Fig. 2 bis 6 dargestellt, durch eine kühlmitteldichte Verbindung der Stege 6 des Kernes 7 mit einer auf den Kern 7 aufgebrachten Hülse 8.1, a roller 1 is provided with a helical coolant channel 2, which is connected to concentric bores 3 arranged in the bearing journal 4 as coolant inflow or outflow via radial bores 5. The individual turns of the coolant channel 2 are separated from one another by the web 6, so that there is a positive guide for the cooling medium in the entire roller 1. The forced guidance is achieved, as shown in FIGS. 2 to 6, by a coolant-tight connection of the webs 6 of the core 7 with a sleeve 8 applied to the core 7.

Gemäß der Erfindung kann die kühlmitteldichte Verbindung und die Fixierung der Hülse 8 gegenüber dem Kern 7 dadurch erzielt werden, daß gemäß Fig. der Steg 6 trapezgewindeförmig ausgebildet ist und in entsprechender Ausnehmung 9 auf der Innenmantelfläche 10 der Hülse 8 eingreift. In der Stirnfläche 11 des Steges 6 ist eine Nut 12 eingearbeitet, in die eine Dichtung 13 von kreisrundem Querschnitt eingelegt ist. Die Hülse8 wird auf den Kern 7 aufgeschraubt, wobei das Steigungsmaß des Gewindeganges selbsthemmend ist. An den Enden ist die Hülse 8 mit dem Kern 7 zweckmäßig verschweißt.According to the invention, the coolant-tight connection and the fixing of the sleeve 8 relative to the core 7 can be achieved in that the web 6 is trapezoidal thread-shaped and engages in a corresponding recess 9 on the inner surface 10 of the sleeve 8. A groove 12 is incorporated in the end face 11 of the web 6, into which a seal 13 of circular cross section is inserted. The sleeve 8 is screwed onto the core 7, the pitch of the thread being self-locking. At the ends, the sleeve 8 is expediently welded to the core 7.

Gemäß Fig. 3 ist die Stirnfläche 11 des Steges 6 selbst mit einem Gewinde versehen, das mit einem entsprechenden Gewinde in der Innenmantelfläche 10 der Hülse 8 in Verbindung steht.3, the end face 11 of the web 6 itself is provided with a thread which is connected to a corresponding thread in the inner lateral surface 10 of the sleeve 8.

In weiterer Ausgestaltung der Erfindung wird, wie in Fig.4 dargestellt, durch eine Preßschweißung die Stirnfläche 11 des Steges 6 mit der Innenmantelfläche 10 der Hülse 8 dauerhaft und dicht verbunden. Unter Preßschweißung wird dabei eine Widerstandsschweißung, wie die Punkt- oder Rollnahtschweißung, verstanden. Es ist natürlich auch möglich, die Kühlmittelkanäle 2 durch entsprechende Bänder abzudecken und die Bandkanten 14 nach Fig. 5 unter Einbeziehung der Stirnfläche 11 der Stege 6 miteinander zu verschweißen.In a further embodiment of the invention, as shown in FIG. 4, the end face 11 of the web 6 is permanently and tightly connected to the inner lateral surface 10 of the sleeve 8 by a pressure welding. Pressure welding is understood to mean resistance welding, such as spot welding or roll seam welding. It is of course also possible to cover the coolant channels 2 with appropriate tapes and to weld the tape edges 14 according to FIG. 5, including the end face 11 of the webs 6.

Ein weiteres erfindungsgemäßes Merkmal besteht darin, daß das im verschweißten Zustand die Hülse 8 bildende Band zur Abdeckung der Kühlmittelkanäle 2 aus einem Rohr mit den Maßen der gewünschten Hülse gewonnen wird, in dem das Rohr derart getrennt oder aus der Rohrwand Materialstreifen entsprechend dem Verlauf der Stege derart herausgeschnitten werden, daß die verbleibenden Schnittkanten die Stege 6 geringfügig überdecken unter Belassung eines Spaltes für die Schweißnaht, die die Schnittkanten 14 mit dem Steg 6 verbinden.Another feature of the invention is that the band forming the sleeve 8 in the welded state for covering the coolant channels 2 is obtained from a tube with the dimensions of the desired sleeve, in which the tube is separated or strips of material from the tube wall in accordance with the course of the webs are cut out in such a way that the remaining cut edges slightly cover the webs 6, leaving a gap for the weld seam which connects the cut edges 14 to the web 6.

In weiterer Ausgestaltung der Erfindung ist es zur Erhöhung der Kühlwirkung des Kühlmediums sowohl auf die Hülse 8 als auch der Walze 1 auf den Strang von Vorteil, den Kühlmittelkanal 2 derart zu gestalten, daß er im Querschnitt einen großen Umfang bei kleiner Querschnittsfläche aufweist und die Seite der Querschnittsfläche mit der größten Längenerstreckung von der Innenmantelfläche 10 der Hülse 8 gebildet ist, beispielsweise durch rechteckige Gestaltung der Querschnittsfläche des Kühlmittelkanals 2 (Fig. 6) oder, wie in Fig. 7 dargestellt, durch einen trapezförmigen Querschnitt. Ebenso ist es von Vorteil, der Innenmantelfläche 10 der Hülse 8 nahe den Verbindungsstellen mit dem Steg 6 eine kerbwirkungsärme, spannungsreduzierende « und die Oberfläche vergrößernde Form zu geben, beispielsweise wie in den Fig. 2 bis 5 und 7 dargestellt, durch halbkreisförmige Ausnehmungen 19. Durch diese Formgebung wird gleichzeitig eine Verbesserung der Kühlwirkung erzielt. Wesentlich für die Biegesteifigkeit der Walze ist auch, daß das Verhältnis von Radius r des Kernes zum Radius des durch den Kühlmittelkanal 2 verminderten Radius a 1 : 0,9 beträgt.In a further embodiment of the invention, to increase the cooling effect of the cooling medium on both the sleeve 8 and the roller 1 on the strand, it is advantageous to design the coolant channel 2 in such a way that it has a large cross-section with a small cross-sectional area and the side the cross-sectional area with the greatest length extension is formed by the inner lateral surface 10 of the sleeve 8, for example by rectangular design of the cross-sectional area of the coolant channel 2 (FIG. 6) or, as shown in FIG. 7, by a trapezoidal cross section. It is also advantageous to give the inner lateral surface 10 of the sleeve 8 a notch-effective, stress-reducing and surface-increasing shape near the connection points with the web 6, for example, as shown in FIGS. 2 to 5 and 7, by means of semicircular recesses 19. This shape also improves the cooling effect. It is also essential for the bending stiffness of the roll that the ratio of the radius r of the core to the radius of the radius a reduced by the coolant channel 2 is 1: 0.9.

Von besonderem Vorteil ist jedoch ein Verfahren, bei dem das die Hülse 8 bildende Rohr entsprechend dem Verlauf der Stege nicht vollständig getrennt wird, sondern, wie in Fig. 6 dargestellt, in die Außenoberfläche des Rohres 8 eine Nut 15 eingearbeitet wird, die einen dünnwandigen Restzylinder 16 als Projektion der Stegstirnflächen 11 bestehen läßt. Dieser Restzylinder 16 hält das Rohr 8 während des Aufbringens auf den Kern 7 und während des Schweißens mechnisch stabil. Der Restzylinder 16 wird beim Aufbringen der ersten Schweißlage 17 aufgeschmolzen und verbindet damit die Stirnfläche 11 des Steges 6 mit dem die Hülse 8 bildenden Rohrwandteil. Falls erforderlich, wird die Nut 15 mit nachfolgenden Schweißlagen 18 aufgefüllt.Of particular advantage, however, is a method in which the tube forming the sleeve 8 is not completely separated in accordance with the course of the webs, but, as shown in FIG. 6, a groove 15 is machined into the outer surface of the tube 8, which groove has a thin wall Residual cylinder 16 can exist as a projection of the web end faces 11. This residual cylinder 16 holds the tube 8 mechanically stable during application to the core 7 and during welding. The remaining cylinder 16 is melted when the first welding layer 17 is applied and thus connects the end face 11 of the web 6 to the tube wall part forming the sleeve 8. If necessary, the groove 15 is filled with subsequent welding layers 18.

Dieses erfindungsgemäße Verfahren ist natürlich nicht auf das geschilderte Beispiel der Herstellung einer innengekühlten Walze beschränkt. Es bietet sich überall dort an, wo schweißbare Metallteile nur in Teilbereichen ihrer Oberfläche verbunden werden sollen, beispielsweise im Apparate- bzw. Behälterbau. Unter Teilbereichen ihrer Oberfläche werden dabei solche Fälle verstanden, bei denen flächige Körper sich mit ihren größeren Oberflächenanteil überdecken, jedoch nur in Teilbereichen berühren, so daß unzugängliche Schweißbereiche entstehen.This method according to the invention is of course not limited to the example described for the production of an internally cooled roll. It can be used wherever weldable metal parts are only to be connected in parts of their surface, for example in the construction of apparatus or containers. Sub-areas of their surface are understood to mean cases in which flat bodies overlap with their larger surface portion, but only touch in sub-areas, so that inaccessible welding areas arise.

Durch die erfindungsgemäßen Maßnahmen erhält man eine Walze, die bei vorgegebenem Außendurchmesser einen möglichst großen Kerndurchmesser bei geringster Hülsendicke aufweist. Sie besitzt damit ein großes Widerstandsmoment. Die thermische Belastung der Rolle wird auf einen kleinen Teil, nämlich den Mantel reduziert. Daraus leitet sich ab, daß die Funktion der Rolle, nämlich Stützen und Kühlen, getrennt sind. Das große Widerstandsmoment der Walze unter Einbeziehung der Hülse stellt sicher, daß auch bei längerer einseitiger Erwärmung der Hülsenoberfläche die Walze frei von Verzug bleibt. Das wirkungsvolle Kühlsystem unterstützt die Walze in ihren Funktionen durch eine geringe Wanddicke der Hülse, eine kontrollierte Wasserführung, eine hohe Geschwindigkeit des Kühlmediums und eine große Kühlfläche.By means of the measures according to the invention, a roller is obtained which, for a given outer diameter, has the largest possible core diameter with the smallest sleeve thickness. It therefore has a large section modulus. The thermal load on the roll is reduced to a small part, namely the jacket. It follows that the role of the role, namely support and cooling, are separate. The large section modulus of the roller, including the sleeve, ensures that the roller remains free of distortion even if the sleeve surface is heated on one side for a long time. The effective cooling system supports the roller in its functions with a low wall thickness of the sleeve, a controlled water flow, a high speed of the cooling medium and a large cooling surface.

Claims (11)

1. Internally cooled supporting- and/or conveying roller, consisting of a core (7) with a cooling medium channel (2) which is let into its surface with the formation of a cross-piece (6), which channel is connected with axially aligned bores (3) which are situated in the bearing pins for the inflow and outflow of cooling medium through radially arranged bores (5) and a sleeve (8) surrounding the core (7), which is connected with the core, whereby the cooling medium channel (2) of the core (7) in cross-section has a large circumference with a small cross-sectional area and the side of the cross-sectional area with the greatest longitudinal extent (20) is formed by the inner peripheral surface (10) of the sleeve (8), characterized in that an attachment which prevents axial displacement of the sleeve (8) with respect to the core (7) is provided such that the sleeve (8) is connected by welding with the remaining surface parts of the core between the cooling medium channels (2) over the entire length of its mutual contact surface.
2. Internally cooled supporting- and/or conveying roller, consisting of.a core (7) with a cooling medium channel (2) which is let into its surface with the formation of a cross-piece (6), which channel is connected with axially aligned bores (3) which are situated in the bearing pins for the inflow and outflow of cooling medium through radially arranged bores (5) and a sleeve (8) surrounding the core (7), which is connected with the core (7), whereby the cooling medium channel (2) of the core (7) in cross-section has a large circumference with a small cross-sectional area and the side of the cross-sectional area with the greatest longitudinal extent (20) is formed by the inner peripheral surface (10) of the sleeve (8), characterised in that an attachment is provided which prevents axial displacement of the sleeve (8) with respect to the core (7) such that a thread course is cut into the front face (11) of the cross-piece (6), which thread course is connected with a corresponding thread in the inner peripheral surface (10) of the sleeve (8).
3. Internally cooled supporting- and/or conveying roller, consisting of a core (7) with a cooling medium channel (2) which is let into its surface with the formation of a cross-piece (6), which channel is connected with axially aligned bores (3) which are situated in the bearing pins for the inflow and outflow of cooling medium through radially arranged bores (5) and a sleeve (8) surrounding the core (7), which is connected with the core (7), whereby the cooling medium channel (2) of the core (7) in cross-section has a large circumference with a small cross-sectional area and the side of the cross-sectional area with the greatest longitudinal extent (20) is formed by the inner peripheral surface (10) of the sleeve (8), characterized in that an attachment is provided which prevents axial displacement of the sleeve (8) with respect to the core, such that the cross-piece (6) of the core (7) between the cooling jacket (2) is constructed so as to be in the form of a trapezoidal thread and is connected by its front face (11) with a corresponding recess (9) in the inner peripheral surface (10) of the sleeve (8), whereby the front face (11) of the cross-piece (6) is provided with a recess (12), into which a sealing material (13) is inserted, having in particular a circular cross-section.
4. Internally cooled supporting- and/or conveying roller according to one of Claims 1 to 3, characterized in that the aspect ratio of the cross-sectional area of the cooling medium channels amounts to at least 5 : 1, preferably 8-10 : 1.
5. Internally cooled roller according to one of Claims 1 to 4, characterized in that the cooling medium channel (2) is let into the surface of the core (7) in the form of a spiral.
6. Internally cooled supporting- and/or conveying roller according to one of Claims 1 to 5, characterized by a ratio of radius of the core R to the radius of the radius a, reduced through the cooling medium channel, of 1 : 0.9.
7. Internally cooled supporting- and/or conveying roller according to one of Claims 1 to 6, characterized by a forming of the inner peripheral surface (10) of the sleeve (8) close to the connection points with the cross-pieces (6) which is free of notch effect, reduces tension and enlarges the surface.
8. Internally cooled supporting- and/or conveying roller according to Claim 1, characterized in that the sleeve (8) is connected with the front face (11) of the cross-piece (6) through pressure welding.
9. Internally cooled supporting- and/or conveying roller according to Claim 1, characterized in that the sleeve (8) is applied onto the core (7) in the form of a band covering the cooling medium channel (3) and the band edges (14) are connected with the front face (11) with filling of the gap between the band edges (14) by means of electric arc welding.
10. Internally cooled supporting- and/or conveying roller according to Claim 1, characterized in that the band covering a helically arranged cooling medium channel is formed from a tube, which is separated peripherally in the pitch of the cooling medium channel (or respectively of the cross-piece).
11. Method for the production of an internally cooled supporting- and/or conveying roller according to Claim 1, with a sleeve (8) and a core (7) which consist of thick-walled steel parts which are able to be welded electrically and which lie on each other in a laminar manner, whereby they only have common areas of contact in partial regions of their surface, and which are connected with each other by means of the electric arc welding process, characterized in that in the surface of one of the steel parts lying opposite the area of contact, a groove (15) is worked in, which leaves a small residual wall thickness and in that the residual wall (16) is fused on during welding and is used together with the electrode material to form a layer of weld such that the sleeve (8) is connected with the core (7) over the length of their common area of contact through welding.
EP83730069A 1982-08-20 1983-07-06 Internally cooled supporting and/or conveying roll and process for manufacturing this roll Expired EP0101661B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83730069T ATE26078T1 (en) 1982-08-20 1983-07-06 INTERNALLY-COOLED BACKUP AND/OR TRANSPORT ROLLER AND METHOD OF PRODUCTION THEREOF.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3231433A DE3231433C2 (en) 1982-08-20 1982-08-20 Internally cooled support and / or transport roller and process for their production
DE3231433 1982-08-20

Publications (2)

Publication Number Publication Date
EP0101661A1 EP0101661A1 (en) 1984-02-29
EP0101661B1 true EP0101661B1 (en) 1987-03-25

Family

ID=6171582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83730069A Expired EP0101661B1 (en) 1982-08-20 1983-07-06 Internally cooled supporting and/or conveying roll and process for manufacturing this roll

Country Status (8)

Country Link
US (1) US4631792A (en)
EP (1) EP0101661B1 (en)
JP (1) JPS5950963A (en)
AT (1) ATE26078T1 (en)
CA (1) CA1232848A (en)
DE (1) DE3231433C2 (en)
ES (1) ES8404942A1 (en)
ZA (1) ZA835876B (en)

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Also Published As

Publication number Publication date
DE3231433C2 (en) 1985-07-11
US4631792A (en) 1986-12-30
CA1232848A (en) 1988-02-16
JPS5950963A (en) 1984-03-24
ES525040A0 (en) 1984-05-16
DE3231433A1 (en) 1984-02-23
EP0101661A1 (en) 1984-02-29
ZA835876B (en) 1984-04-25
ES8404942A1 (en) 1984-05-16
ATE26078T1 (en) 1987-04-15

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