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EP0101661A1 - 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
EP0101661A1
EP0101661A1 EP83730069A EP83730069A EP0101661A1 EP 0101661 A1 EP0101661 A1 EP 0101661A1 EP 83730069 A EP83730069 A EP 83730069A EP 83730069 A EP83730069 A EP 83730069A EP 0101661 A1 EP0101661 A1 EP 0101661A1
Authority
EP
European Patent Office
Prior art keywords
roller according
sleeve
core
web
coolant channel
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.)
Granted
Application number
EP83730069A
Other languages
German (de)
French (fr)
Other versions
EP0101661B1 (en
Inventor
Karl-Friedrich Wesemann
Rainer Lenk
Klaus Ing. Grad Kobusch
Manfred Dipl. Ing. Markan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT83730069T priority Critical patent/ATE26078T1/en
Publication of EP0101661A1 publication Critical patent/EP0101661A1/en
Application granted granted Critical
Publication of EP0101661B1 publication Critical patent/EP0101661B1/en
Expired legal-status Critical Current

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Classifications

    • 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 roller for supporting and / or transporting hot metal bodies, in particular steel strands produced in continuous casting processes.
  • Internally cooled rolls for supporting and / or transporting hot metal bodies, in particular steel strands produced in continuous casting processes, are known. 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 invention has for its object to eliminate the disadvantages mentioned and to provide a roll which has improved bending stiffness, is thermally stable, also with regard to the cooling effect to be exerted on the strand and to specify a method for producing such a roll.
  • Thermally stable is also understood to mean the case that the operability of the roller is not impaired in the event of temporarily increased one-sided heat application.
  • the roller 1 is provided with a helical coolant channel 2 which is connected to concentric bores 3 arranged in the bearing journal 4 as a 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 roller core 7 with a sleeve 8 applied to the core 7.
  • the coolant-tight connection and the fixing of the sleeve S with respect to the core 7 can be achieved in that, according to FIG. 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 of 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 surface 10 of the sleeve 8 near the junctions with the web 6, a notch effects which stress reducing "and the surface enlarging" form, for example as shown in F ig. 2 to 5 and 7 shown by semicircular recesses 19.
  • This shape simultaneously 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 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 is suitable wherever weldable metal parts are only to be connected in parts of their surface, for example in apparatus or container construction. Sub-areas of their surface are understood to mean cases in which flat bodies overlap with their larger surface portion, but only in sub-areas ; touch so that inaccessible welding areas are created. But also those cases in which the O-like body or thick-walled metal sheets border each other with their edges, for example as shown schematically in FIGS. 8 and 9.
  • the edge region of the sheets 21, 22 is machined by machining in such a way that a small remaining wall thickness remains in the form of the projection 23 and the material part 25 delimiting the groove 24.
  • the material portion 25 is partially melted here and forms the first welding layer with the electrode material, which connects the sheets 21, 22 to one another via the projection 23.
  • the projection 23 also prevents the welding melt from flowing into the interior of the container.
  • the degree of melting can be regulated, for example, by the current strength used.
  • FIG. 9 shows an illustration for the case in which two sheets 26, 27 which overlap in the edge region are to be welded.
  • a groove 28 can be worked into the outer sheet 26.
  • the remaining wall thickness 29 is melted with the first welding layer and connected to the sheet 27.
  • the edges 30, 31 of the sheet 26, 27 are then welded to the other sheet.
  • the corresponding welding layers are designated 32, 33.
  • 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. From this it can be deduced that the role of the role, namely pruning 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Continuous Casting (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Rollers For Roller Conveyors For Transfer (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 Walze zum Stützen und/oder Transportieren von heißen Metallkörpern, insbesondere von in kontinuierlichen Gießverfahren erzeugten Stahlsträngen.The invention relates to an internally cooled roller for supporting and / or transporting hot metal bodies, in particular steel strands produced in continuous casting processes.

Innengekühlte Walzen zum Stützen und/oder Transportieren von heißen Metallkörpern, insbesondere von in kontinuierlichen Gießverfahren erzeugten Stahlsträngen sind bekannt. 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. 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 1200 *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 Zwangsführu.ng.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 forced. 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 auszu- übenden Kühlwirkung sowie ein Verfahren zur Herstellung einer derartigen Walze anzugeben. Unter thermisch stabil wird auch der Fall verstanden, daß bei zeitweiser verstärkter einseiti.ger Wärmebeaufschlagung die Betriebsfähigkeit der Walze nicht beeinträchtigt wird.The invention has for its object to eliminate the disadvantages mentioned and to provide a roll which has improved bending stiffness, is thermally stable, also with regard to the cooling effect to be exerted on the strand and to specify a method for producing such a roll. Thermally stable is also understood to mean the case that the operability of the roller is not impaired in the event of temporarily increased one-sided heat application.

Die Aufgabe wird gelöst durch eine Walze, wie erfindungsgemäß in Anspruch 1 dargestellt. Weitere vorteilhafte, die Erfindung weiterbildende Maßnahmen sind in den Unteransprüchen beschrieben. Erfindungsgemäße Verfahren zur Herstellung einer derartigen Walze beinhalten die Ansprüche 15 bis 18.The object is achieved by a roller, as shown in claim 1 according to the invention. Further advantageous measures that further develop the invention are described in the subclaims. Methods according to the invention for producing such a roller include claims 15 to 18.

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

  • Fig. 1 eine Walze in perspektivischer Darstellung,
  • Fig. 2 bis 6 ausschnittsweise Vergrößerungen der Verbindungsstelle zwischen Kern und Hülse und
  • Fig. 7 eine vergrößerte Darstellung eines Kühlmittelkanals einer längsgeschnitten Walze.
  • Fig. 8 und 9 Beispiele für die Anwendung des erfindungsgemäßen Verfahrens beim Schweißen von Blechen.
Show it
  • 1 is a roller in perspective,
  • Fig. 2 to 6 enlarged sections of the connection between the core and sleeve and
  • Fig. 7 is an enlarged view of a coolant channel of a longitudinally cut roller.
  • 8 and 9 examples of the application of the method according to the invention when welding sheet metal.

Gemäß Fig. 1 ist die Walze 1 mit einem schraubenlinienförmigen Kihlmittelkanal 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 Walzenkernes 7 mit einer auf den Kern 7 aufgebrachten Hülse 8.1, the roller 1 is provided with a helical coolant channel 2 which is connected to concentric bores 3 arranged in the bearing journal 4 as a 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 roller core 7 with a sleeve 8 applied to the core 7.

Gemäß der Erfindung kann die kühlmitteldichte Verbindung und die Fixierung der Hülse S gegenüber dem Kern 7 dadurch erzielt werden, daß gemäß Fig. 2 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 Hülse 8 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 S with respect to the core 7 can be achieved in that, according to FIG. 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 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 kerbwirkungsarme, 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 ein 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 verminderten Radius a 1:0,9 beträgt.In a further embodiment of the invention, to increase the cooling effect of the cooling medium, both on 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 of 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. Likewise, it is advantageous to give the inner surface 10 of the sleeve 8 near the junctions with the web 6, a notch effects which stress reducing "and the surface enlarging" form, for example as shown in F ig. 2 to 5 and 7 shown by semicircular recesses 19. This shape simultaneously 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 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 one thin-walled 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 5 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. Aber auch solche Fälle, bei denen der-O artige Körper oder auch dickwandige Bleche mit ihren Kanten aneinander grenzen, beispielsweise wie in den Fig. 8 und 9 schematisch dargestellt.This method according to the invention is of course not limited to the example described for the production of an internally cooled roll. It is suitable wherever weldable metal parts are only to be connected in parts of their surface, for example in apparatus or container construction. Sub-areas of their surface are understood to mean cases in which flat bodies overlap with their larger surface portion, but only in sub-areas ; touch so that inaccessible welding areas are created. But also those cases in which the O-like body or thick-walled metal sheets border each other with their edges, for example as shown schematically in FIGS. 8 and 9.

Gemäß Fig. 8 wird dabei der Kantenbereich der Bleche 21, 22 derart durch spanende Formgebung bearbeitet, daß eine geringe Restwanddicke in Form des 5 Vorsprunges 23 als auch des die Nut 24 begrenzenden Materialsteils 25 verbleibt. Beim Schweißvorgang wird hier der Materialanteil 25 zum Teil aufgeschmolzen und bildet mit dem Elektrodenmaterial die erste Schweißlage, die die Bleche 21, 22 über den Vorsprung 23 miteinander verbindet. Bei der Außenschweißung von Behältern verhindert der Vorsprung 23 zugleich ein Durchfließen der Schweißschmelze in das Behälterinnere. Das Maß des Aufschmelzens kann beispielsweise über die benutzte Stromstärke reguliert werden.8, the edge region of the sheets 21, 22 is machined by machining in such a way that a small remaining wall thickness remains in the form of the projection 23 and the material part 25 delimiting the groove 24. During the welding process, the material portion 25 is partially melted here and forms the first welding layer with the electrode material, which connects the sheets 21, 22 to one another via the projection 23. When containers are welded externally, the projection 23 also prevents the welding melt from flowing into the interior of the container. The degree of melting can be regulated, for example, by the current strength used.

Fig. 9 zeigt eine Darstellung für den Fall, daß zwei sich im Kantenbereich überlappende Bleche 26, 27 verschweißt werden sollen. Hier kann in das außen liegende Blech 26 eine Nut 28 eingearbeitet werden. Die verbleibende Restwanddicke 29 wird mit der ersten Schweißlage aufgeschmolzen und mit dem Blech 27 verbunden. Die Kanten 30, 31 der Blech 26, 27 werden dann anschließend mit dem jeweils anderen Blech verschweißt. Die entsprechenden Schweißlagen sind mit 32, 33 bezeichnet.FIG. 9 shows an illustration for the case in which two sheets 26, 27 which overlap in the edge region are to be welded. Here, a groove 28 can be worked into the outer sheet 26. The remaining wall thickness 29 is melted with the first welding layer and connected to the sheet 27. The edges 30, 31 of the sheet 26, 27 are then welded to the other sheet. The corresponding welding layers are designated 32, 33.

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 Stutzen 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. From this it can be deduced that the role of the role, namely pruning 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 (17)

1. Innengekühlte Stütz- und/oder Transportwalze, bestehend aus einem Kern mit in seiner Oberfläche eingelassenem Kühlmittelkanal, der mit in den Lagerzapfen befindlichen axial gerichteten Bohrungen für den Kühlmittelzu- und -abfluß durch radial angeordnete Bohrungen verbunden ist und
eine den Kern umgebende Hülse,
gekennzeichnet durch
eine auch unter einseitiger Beaufschlagung durch Druck und hohe Wärme kühlmitteldichte und eine Verschiebung zwischen dem Steg (6) des Kerns (7) und Hülse (8) verhindernde Verbindung.1. Internally cooled support and / or transport roller, consisting of a core with a coolant channel embedded in its surface, which is connected to axially directed bores for the coolant inflow and outflow through radially arranged bores and
a sleeve surrounding the core,
marked by
a connection which is coolant-tight even under one-sided exposure to pressure and high heat and prevents a displacement between the web (6) of the core (7) and sleeve (8). 2. Walze nach Anspruch 1, dadurch gekennzeichnet,
daß der Kühlmittelkanal (2) des Kerns (7) im Querschnitt einen große Umfang bei kleiner Querschnittsfläche aufweist und die Seite der Querschnittsfläche mit der größten Längenerstreckung (20) von der Innenmantelfläche (10) der Hülse (8) gebildet ist.2. Roller according to claim 1, characterized in
that the coolant channel (2) of the core (7) has a large cross-section with a small cross-sectional area and the side of the cross-sectional area with the greatest length extension (20) is formed by the inner lateral surface (10) of the sleeve (8). 3. Walze nach Anspruch 2,
dadurch gekennzeichnet,
daß das Seitenverhältnis mindestens 5:1, vorzugsweise 8 bis 10:1 beträgt.3. Roller according to claim 2,
characterized,
that the aspect ratio is at least 5: 1, preferably 8 to 10: 1. 4. Walze nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß der Kühlmittelkanal (2) in die Oberfläche des Kernes (7) schraubenlinienförmig eingelassen ist.4. Roller according to one of claims 1 to 3,
characterized,
that the coolant channel (2) is embedded in the surface of the core (7) helically. 5. Walze nach Anspruch 1,
gekennzeichnet durch
ein Verhältnis von Radius des Kernes (r) zum Radius des durch den Kühlmittelkanal verminderten Radius (a) von 1:0,9.5. Roller according to claim 1,
marked by
a ratio of the radius of the core (r) to the radius of the radius (a) reduced by the coolant channel of 1: 0.9. 6. Walze nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß der Steg (6) des Kernes (7) zwischen dem Kühlmittelkanal (2) trapezgewindeförmig ausgebildet ist.6. Roller according to one of claims 1 to 5,
characterized,
that the web (6) of the core (7) between the coolant channel (2) is trapezoidal. 7. Walze nach einem oderen mehreren der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß die Stirnfläche (11) des Steges (6) mit einer Ausnehmung (12) versehen ist, in die ein Dichtmaterial (13) mit insbesondere kreisförmigem Querschnitt eingelegt ist.7. roller according to one or more of claims 1 to 6,
characterized,
that the end face (11) of the web (6) is provided with a recess (12) into which a sealing material (13) with a particularly circular cross section is inserted. 8. Walze nach einem oderen mehreren der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß der trapezgewindeförmige Steg (6) mit einer korrespondierenden Ausnehmung (9) in der Innenmantelfläche (10) der Hülse (8) steht.8. roller according to one or more of claims 1 to 7,
characterized,
that the trapezoidal thread-shaped web (6) with a corresponding recess (9) in the inner surface (10) of the sleeve (8). 9. Walze nach Anspruch 1 und 6,
dadurch gekennzeichnet,
daß in die Stirnfläche (11) des Steges (6) ein Gewindegang eingeschnitten ist, der mit einem entsprechenden Gewinde in der Innenmantel-. fläche (10) der Hülse (8) in Verbindung steht.9. Roller according to claim 1 and 6,
characterized,
that in the end face (11) of the web (6) a thread is cut, which with a corresponding thread in the inner jacket. surface (10) of the sleeve (8) is connected. I 10. Walze nach einem oder mehreren der Ansprüche 1 bis 9,
gekennzeichnet durch
eine kerbwirkungsarme, spannungsreduzierende und die Oberfläche vergrößernde Formgebung der Innenmantelfläche (10) der Hülse (8) nahe den Verbindungsstellen mit den Stegen (6).I 10. Roller according to one or more of claims 1 to 9,
marked by
a low-notch, stress-reducing and surface-enlarging shape of the inner circumferential surface (10) of the sleeve (8) near the connection points with the webs (6). 11. Walze nach einem oder mehreren der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
daß die Hülse (8) mit der Stirnfläche (11) des Steges (6) durch Schweißen verbunden ist.11. Roller according to one or more of claims 1 to 10,
characterized,
that the sleeve (8) is connected to the end face (11) of the web (6) by welding. 12. Walze nach Anspruch 11,
dadurch gekennzeichnet,
daß die Hülse (8) mit der Stirnfläche (11) des Steges (6) durch Preßschweißen verbunden ist.12. Roller according to claim 11,
characterized,
that the sleeve (8) is connected to the end face (11) of the web (6) by pressure welding. 13. Walze nach Anspruch 11,
dadurch gekennzeichnet, ;
daß die Hülse (8) in Form eines den Kühlmittelkanal (2) abdeckenden Bandes auf den Kern (7) aufgebracht ist und die Bandkanten (14) mit der Stirnfläche (11) unter Auffüllen des Spaltes zwischen den Bandkanten (14) mittels Elektrolichtbogenschweißens verbunden ist.13. Roller according to claim 11,
characterized, ;
that the sleeve (8) in the form of a band covering the coolant channel (2) is applied to the core (7) and the band edges (14) are connected to the end face (11) by filling the gap between the band edges (14) by means of electric arc welding . 14. Walze nach Anspruch 11 und 13,
dadurch gekennzeichnet,
daß das einen schraubenlinienförmig angeordneten Kühlmittelkanal (2) abdeckende Band aus einem Rohr gebildet ist, das im Steigungsmaß des Kühlmittelkanales (bzw. des Steges) umlaufend getrennt ist.14. Roller according to claim 11 and 13,
characterized,
that the helically arranged coolant channel (2) covering band is formed from a tube which is circumferentially separated in the pitch of the coolant channel (or the web). 15. Verfahren zum Verbinden zweier elektrisch schweißbarer Metallteile mittels des Elektrolichtbogenschweißverfahrens, insbesondere zur Herstellung einer Walze nach Anspruch 1,
dadurch gekennzeichnet,
daß bei Metallteilen, die nur in Teilbereichen ihrer Oberfläche verbunden werden sollen, mindestens eines der Materialteile an der zu verbindenden Stelle ein mindestens teilweises Durchschmelzen des Materials gestattende, verringerte Wanddicke aufweist.15. A method for connecting two electrically weldable metal parts by means of the electric arc welding method, in particular for producing a roller according to claim 1.
characterized,
that in the case of metal parts which are only to be connected in partial areas of their surface, at least one of the material parts at the point to be connected has an at least partial melting of the material, which permits reduced wall thickness. 16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß zum Verschweißen von Randbereichen von Materialteilen die Wanddicke mindestens eines Materialteiles mittels spanabhebender Formgebung entweder als Vorsprung oder in Form von Ausnehmungen gebildet wird.16. The method according to claim 15, characterized in that for welding edge regions of material parts, the wall thickness of at least one material part is formed by means of machining either as a projection or in the form of recesses. 17. Verfahren nach Anspruch 15, dadurch gekennzeichnet, daß bei flächig aufeinanderliegenden dickwandigen Stahlteilen, die nur in Teilbereichen ihrer Oberfläche gemeinsame Berührungsflächen besitzen, in der der Berührungsfläche gegenüberliegenden Oberfläche eines der Stahlteile eine Nut eingearbeitet wird, die eine geringe Restwanddicke beläßt und daß die Restwand während des Schweißens aufgeschmolzen und zusammen mit dem Elektrodenmaterial zur Bildung einer Schweißlage benutzt wird.17. The method according to claim 15, characterized in that in the case of flat, thick-walled steel parts which only have common contact surfaces in partial areas of their surface, a groove is incorporated in the surface of the steel parts opposite the contact surface, which leaves a small remaining wall thickness and that the remaining wall melted during welding and used together with the electrode material to form a welding layer.
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 true EP0101661A1 (en) 1984-02-29
EP0101661B1 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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WO1991013709A2 (en) * 1990-03-16 1991-09-19 Battelle Development Corporation Uniformly-cooled casting wheel
US9630247B2 (en) 2012-07-20 2017-04-25 Sms Concast Ag Guide roller for guiding a strand in a strand casting system

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US9630247B2 (en) 2012-07-20 2017-04-25 Sms Concast Ag Guide roller for guiding a strand in a strand casting system

Also Published As

Publication number Publication date
ES525040A0 (en) 1984-05-16
DE3231433A1 (en) 1984-02-23
ES8404942A1 (en) 1984-05-16
EP0101661B1 (en) 1987-03-25
DE3231433C2 (en) 1985-07-11
CA1232848A (en) 1988-02-16
JPS5950963A (en) 1984-03-24
ATE26078T1 (en) 1987-04-15
ZA835876B (en) 1984-04-25
US4631792A (en) 1986-12-30

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