EP0119467B1 - Process for fixing a malleable metallic jacket to a rod of composite material, and insulator produced by carrying out this process - Google Patents

Process for fixing a malleable metallic jacket to a rod of composite material, and insulator produced by carrying out this process Download PDF

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Publication number
EP0119467B1
EP0119467B1 EP84101546A EP84101546A EP0119467B1 EP 0119467 B1 EP0119467 B1 EP 0119467B1 EP 84101546 A EP84101546 A EP 84101546A EP 84101546 A EP84101546 A EP 84101546A EP 0119467 B1 EP0119467 B1 EP 0119467B1
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EP
European Patent Office
Prior art keywords
sleeve
rod
composite material
electrical insulator
metal
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
EP84101546A
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German (de)
French (fr)
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EP0119467A1 (en
Inventor
Denis Dumora
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Ceraver SA
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Ceraver SA
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Application filed by Ceraver SA filed Critical Ceraver SA
Priority to AT84101546T priority Critical patent/ATE25166T1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/38—Fittings, e.g. caps; Fastenings therefor
    • H01B17/40—Cementless fittings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49227—Insulator making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force

Definitions

  • the present invention relates to a method for fixing a malleable metal sleeve to a rod of composite material according to the preamble of claim 1.
  • the sleeve may for example be made of steel or of aluminum alloy, while the rod may consist of fibers glass impregnated with synthetic resin.
  • a method according to the preamble of claim 1 is described in document DE-A-1 400 003.
  • the sleeve belongs to an end fitting of an electrical insulator, the rod of which is the insulating element, it is understandable that its attachment to the rod is an extremely critical operation. If one proceeds by mechanical shrinking, it is necessary that the compression is sufficient to ensure the maintenance of the rod in its sleeve, even in the event of significant tensile force; but this compression should not be excessive so as not to risk damaging the fibers and causing cracks.
  • This method has drawbacks because it creates a creep of the metal of the sleeve, perpendicular to the compression forces in two opposite directions, symmetrically with respect to the median plane of the compressed zone; this causes tensile forces in the fibers of the rod in two opposite directions.
  • the application of the compression forces is not homogeneous along all the generatrices of the sleeve, an ovalization of the rod is observed with delamination of the fibers.
  • the known process therefore causes deterioration of the fibers capable of considerably reducing the performance of the insulator concerned.
  • the object of the present invention is to avoid these drawbacks and to propose a method which reduces the risk of deterioration of the rod when the sleeve is compressed. This object is achieved by the method as characterized in claim 1.
  • the elastic elongation limit of the glass fibers E is of the order of 3% while the deformation of the metal can cause the sleeve to lengthen of the order of 6% to 10%.
  • the method according to the invention causes progressive tightening of the sleeve on the rod capable of stretching the fibers in one direction from the inlet of the sleeve, unlike known methods.
  • the compressive force is variable depending on the annular zones considered.
  • the present invention also relates to an electrical insulator obtained by the implementation of the above method. It comprises at least one end fitting having a sleeve in which one end of the rod has been fixed.
  • the inlet of the sleeve has an uncompressed bead on the rod.
  • the fitting 2 comprises a cylindrical sleeve 3 provided with an internal cylindrical housing 6 with an axis 9 and capable of receiving with gentle friction the end 11 of a rod 10 of composite material, for example based on glass fibers impregnated with synthetic resin.
  • the play between the rod and the interior wall of the housing 6 has been deliberately exaggerated in the figure).
  • the end face of the rod 10 applied against the bottom 7 of the housing 6 has been referenced 8.
  • the inlet of the fitting 2 is provided with a bead 5 which will not be compressed on the rod 10.
  • Such an arrangement makes it possible to separate the zones of maximum mechanical stress, which are located in the compressed zone of the fitting 2, zones of maximum electrical stresses which are situated substantially outside the fitting beyond the plane 12.
  • the area of the sleeve interested in the necking is referenced by L. It is limited on the one hand by a plane 13, orthogonal to the axis 9 and located after the bead 5, and on the other hand by a plane orthogonal to the axis 9 and passing substantially through the terminal face 8 of the rod 10.
  • FIG. 3 has shown in solid lines the fitting 2 ′ after shrinking and we have recalled by dotted lines its initial configuration.
  • the sleeve and the fixing end have been referenced respectively 3 'and 4'.
  • the metal of the sleeve is hardened around the end 11 ′ of the rod 10 whose fibers have been drawn only in the direction shown diagrammatically by the arrow 20.
  • FIGS 4 and 5 show very schematically a device for implementing the method which has just been described.
  • Figure 4 shows the device in the starting position (see Figure 1), while the right part shows the device after the shrinking operation has been performed (see Figure 3).
  • This device comprises eight curvilinear sectors 41 to 48; one of them, the sector 41 is seen in the final position and in the initial position in FIG. 4, while they are all seen in FIG. 5 under the references 41 'to 48' in the final position.
  • These sectors are arranged radially with respect to the axis 9 of the rod 10 and are regularly distributed around this axis.
  • a part 51 of the external face of the sector 41 constitutes a compression zone for the constriction.
  • the translational movement 60 of the fitting caused by the rotary movement of the sectors is such that the compression zone of a sector is applied successively at any point in a zone of the sleeve corresponding to the width of the compression zone.
  • the transverse curvature of the sector compression zone is substantially zero. This provision simplifies the manufacturing of sectors but is not compulsory.
  • the number of sectors is of course not limited to eight; it can be modified, for example as a function of the diameter of the sleeve to be shrunk.
  • the longitudinal profile of the compression zone is chosen as a function of the force which it is desired to impart to this or that annular zone of the sleeve.
  • the method according to the invention makes it possible to preserve the fibers of the rod while ensuring the desired attachment for the rod in its sleeve.
  • the following advantage should also be noted, relating to an organic insulator comprising a rod of any length, two constricted fittings and an insulating coating possibly provided with fins. It appears from Figures 1 and 3 that the distance between the planes "entry of the two fittings is not changed by the method according to the invention. It is therefore possible to place the rod and its fittings, directly and without adjustment, in a mold to produce a one-piece insulating coating.

Landscapes

  • Insulating Bodies (AREA)
  • Insulators (AREA)
  • Forging (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Dowels (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Inorganic Insulating Materials (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Organic Insulating Materials (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Clamps And Clips (AREA)

Abstract

The present invention provides a method of fixing a sleeve (3) of malleable metal on a rod (10) of composite material, said sleeve comprising a cylindrical internal housing (6) in which an end (11) of said rod (10) is received. A compression operation is performed causing the sleeve to be stretched in a continuous manner over annular zones of the sleeve substantially from the inlet of the sleeve and substantially up to the end of the rod in such a manner as to cold draw the metal of the sleeve around the rod without stretching the composite material beyond its elastic strain limit.

Description

La présente invention concerne un procédé pour fixer un manchon métallique malléable sur un jonc en matériau composite selon le préambule de la revendication 1. Le manchon peut être par exemple en acier ou en alliage d'aluminium, tandis que le jonc peut être constitué de fibres de verre imprégnées de résine synthétique. Un procédé selon le préambule de la revendication 1 est décrit dans le document DE-A-1 400 003.The present invention relates to a method for fixing a malleable metal sleeve to a rod of composite material according to the preamble of claim 1. The sleeve may for example be made of steel or of aluminum alloy, while the rod may consist of fibers glass impregnated with synthetic resin. A method according to the preamble of claim 1 is described in document DE-A-1 400 003.

Lorsque le manchon appartient à une ferrure d'extrémité d'un isolateur électrique dont le jonc est l'élément isolant, on conçoit que sa fixation sur le jonc soit une opération extrêmement critique. Si l'on procède par rétreint mécanique, il faut que la compression soit suffisante pour assurer le maintien du jonc dans son manchon, même en cas d'effort de traction important ; mais cette compression ne doit pas être excessive pour ne pas risquer d'endommager les fibres et de provoquer des craquelures.When the sleeve belongs to an end fitting of an electrical insulator, the rod of which is the insulating element, it is understandable that its attachment to the rod is an extremely critical operation. If one proceeds by mechanical shrinking, it is necessary that the compression is sufficient to ensure the maintenance of the rod in its sleeve, even in the event of significant tensile force; but this compression should not be excessive so as not to risk damaging the fibers and causing cracks.

Dans les brevets américains 3152392, 3192622 (correspondant au document mentionné ci-dessus) et dans les brevets français 2418960 et 2447082, on propose d'insérer l'extrémité du jonc dans le logement cylindrique d'un manchon dont la surface externe peut être soit cylindrique, soit légèrement conique ou bico- nique. On réalise le rétreint par l'intermédiaire d'une matrice polygonale de compression en plusieurs pièces, de manière à appliquer simultanément en tout point de la face externe du manchon une force radiale centripète. Le but recherché est de multiplier le nombre de pièces de la matrice pour que la force radiale soit la plus uniforme possible.In the US patents 3,152,392, 3,192,622 (corresponding to the document mentioned above) and in the French patents 2,418,960 and 2,447,082, it is proposed to insert the end of the rod into the cylindrical housing of a sleeve whose external surface can be either cylindrical, either slightly conical or bi-conical. The constriction is carried out by means of a polygonal compression matrix in several pieces, so as to simultaneously apply at any point on the external face of the sleeve a centripetal radial force. The aim is to multiply the number of parts of the matrix so that the radial force is as uniform as possible.

Ce procédé présente des inconvénients car il crée un fluage du métal du manchon, perpendiculairement aux forces de compression dans deux directions opposées, symétriquement par rapport au plan médian de la zone comprimée ; ceci entraîne des efforts de traction dans les fibres du jonc suivant deux directions opposées. En outre, si l'application des forces de compression n'est pas homogène suivant toutes les génératrices du manchon, on observe une ovalisation du jonc avec délaminage des fibres.This method has drawbacks because it creates a creep of the metal of the sleeve, perpendicular to the compression forces in two opposite directions, symmetrically with respect to the median plane of the compressed zone; this causes tensile forces in the fibers of the rod in two opposite directions. In addition, if the application of the compression forces is not homogeneous along all the generatrices of the sleeve, an ovalization of the rod is observed with delamination of the fibers.

Le procédé connu provoque donc des détériorations des fibres susceptibles de diminuer considérablement les performances de l'isolateur concerné.The known process therefore causes deterioration of the fibers capable of considerably reducing the performance of the insulator concerned.

La présente invention a pour but d'éviter ces inconvénients et de proposer un procédé qui réduit le risque d'une détérioration du jonc lors de la compression du manchon. Ce but est atteint par le procédé tel qu'il est caractérisé dans la revendication 1.The object of the present invention is to avoid these drawbacks and to propose a method which reduces the risk of deterioration of the rod when the sleeve is compressed. This object is achieved by the method as characterized in claim 1.

A titre d'exemple, la limite d'allongement élastique des fibres de verre E est de l'ordre de 3 % tandis que la déformation du métal peut entraîner un allongement du manchon de l'ordre de 6 % à 10%.By way of example, the elastic elongation limit of the glass fibers E is of the order of 3% while the deformation of the metal can cause the sleeve to lengthen of the order of 6% to 10%.

Le procédé selon l'invention provoque un serrage progressif du manchon sur le jonc susceptible d'étirer les fibres dans une seule direction à partir de l'entrée du manchon, contrairement aux procédés connus.The method according to the invention causes progressive tightening of the sleeve on the rod capable of stretching the fibers in one direction from the inlet of the sleeve, unlike known methods.

Selon un perfectionnement du procédé conforme à l'invention, la force de compression est variable selon les zones annulaires considérées.According to an improvement of the method according to the invention, the compressive force is variable depending on the annular zones considered.

La présente invention a également pour objet un isolateur électrique obtenu par la mise en oeuvre du procédé ci-dessus. Il comporte au moins une ferrure d'extrémité présentant un manchon dans lequel a été fixée une extrémité du jonc.The present invention also relates to an electrical insulator obtained by the implementation of the above method. It comprises at least one end fitting having a sleeve in which one end of the rod has been fixed.

Selon une variante de réalisation, et pour des raisons qui seront explicitées plus loin, l'entrée du manchon présente un bourrelet non comprimé sur le jonc.According to an alternative embodiment, and for reasons which will be explained below, the inlet of the sleeve has an uncompressed bead on the rod.

D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description suivante d'un mode de mise en œuvre donné à titre illustratif mais nullement limitatif.Other characteristics and advantages of the invention will appear during the following description of an embodiment given by way of illustration but in no way limiting.

Dans le dessin annexé :

  • la figure 1 montre en coupe axiale une extrémité d'un isolateur organique, et notamment une ferrure dans laquelle est engagée l'extrémité d'un jonc en matériau composite,
  • la figure 2 est un diagramme montrant très schématiquement l'amplitude des forces de compression appliquées sur le manchon,
  • la figure 3 montre en coupe axiale l'extrémité de l'isolation de la figure 1 après l'opération de rétreint schématisée par la figure 2,
  • la figure 4 montre en coupe schématique un dispositif permettant la mise en oeuvre du procédé selon l'invention, les parties gauche et droite de cette figure correspondant respectivement aux deux états de l'isolateur illustrés dans les figures 1 et 3.
  • la figure 5 est une vue schématique en coupe transversale selon la ligne V de la figure 4 ; on y voit en outre l'ensemble des secteurs de compression associés au manchon.
In the attached drawing:
  • FIG. 1 shows in axial section one end of an organic insulator, and in particular a fitting in which the end of a rod made of composite material is engaged,
  • FIG. 2 is a diagram very schematically showing the amplitude of the compression forces applied to the sleeve,
  • FIG. 3 shows in axial section the end of the insulation of FIG. 1 after the shrinking operation shown diagrammatically in FIG. 2,
  • FIG. 4 shows in schematic section a device allowing the implementation of the method according to the invention, the left and right parts of this figure corresponding respectively to the two states of the insulator illustrated in FIGS. 1 and 3.
  • Figure 5 is a schematic cross-sectional view along line V of Figure 4; it also shows all of the compression sectors associated with the sleeve.

On a représenté sur la figure 1 une extrémité d'un isolateur 1 comportant une ferrure 2 en métal malléable, tel que l'acier ou un alliage d'aluminium, présentant un manchon cylindrique 3 et une extrémité de fixation 4 ; cette dernière présente toute forme adaptée à l'utilisation de l'isolateur. L'essentiel est que la ferrure 2 comporte un manchon cylindrique 3 muni d'un logement cylindrique interne 6 d'axe 9 et susceptible de recevoir à frottement doux l'extrémité 11 d'un jonc 10 en matériau composite, par exemple à base de fibres de verre imprégnées de résine synthétique. (Le jeu entre le jonc et la paroi intérieure du logement 6 a été volontairement exagéré sur la figure). On a référencé 8 la face extrême du jonc 10 appliquée contre le fond 7 du logement 6.There is shown in Figure 1 an end of an insulator 1 having a fitting 2 of malleable metal, such as steel or an aluminum alloy, having a cylindrical sleeve 3 and a fixing end 4; the latter has any shape suitable for the use of the insulator. The main thing is that the fitting 2 comprises a cylindrical sleeve 3 provided with an internal cylindrical housing 6 with an axis 9 and capable of receiving with gentle friction the end 11 of a rod 10 of composite material, for example based on glass fibers impregnated with synthetic resin. (The play between the rod and the interior wall of the housing 6 has been deliberately exaggerated in the figure). The end face of the rod 10 applied against the bottom 7 of the housing 6 has been referenced 8.

L'entrée de la ferrure 2 est munie d'un bourrelet 5 qui ne sera pas comprimé sur le jonc 10. On a référencé 12 le plan « d'entrée de la ferrure qui coupe en A l'axe 9 commun au jonc 10 et à la ferrure 2. Une telle disposition permet de séparer les zones de contraintes mécaniques maximum, qui se situent dans la zone comprimée de la ferrure 2, des zones de contraintes électriques maximum qui se situent sensiblement à l'extérieur de la ferrure au-delà du plan 12.The inlet of the fitting 2 is provided with a bead 5 which will not be compressed on the rod 10. We have referenced 12 the plane "entry of the fitting which cuts at A the axis 9 common to the rod 10 and to the fitting 2. Such an arrangement makes it possible to separate the zones of maximum mechanical stress, which are located in the compressed zone of the fitting 2, zones of maximum electrical stresses which are situated substantially outside the fitting beyond the plane 12.

La zone du manchon intéressée par le rétreint est référencée par L. Elle est limitée d'une part par un plan 13, orthogonal à l'axe 9 et située après le bourrelet 5, et d'autre part par un plan orthogonal à l'axe 9 et passant sensiblement par la face terminale 8 du jonc 10.The area of the sleeve interested in the necking is referenced by L. It is limited on the one hand by a plane 13, orthogonal to the axis 9 and located after the bead 5, and on the other hand by a plane orthogonal to the axis 9 and passing substantially through the terminal face 8 of the rod 10.

On a schématisé sur la figure 2 l'opération de rétreint dans le plan de coupe de la figure 1 par rapport à deux axes orthogonaux (Ot, Ol), Ot représentant l'axe des temps et Ol les abscisses des points d'application des forces de compression sur une génératrice de longueur L. Les flèches 20 schématisent l'amplitude de ces forces.We schematized in Figure 2 the operation of shrinking in the section plane of Figure 1 with respect to two orthogonal axes ( Ot , Ol ), Ot representing the time axis and Ol the abscissa of the points of application of the compressive forces on a generator of length L. The arrows 20 schematize the amplitude of these forces.

Contrairement à l'art antérieur où l'on réalisait une compression simultanée en tout point de la surface externe du manchon, on effectue selon l'invention, entre t, et t2, une compression continue suivant des zones annulaires du manchon, en partant sensiblement du plan 13, jusqu'aux environs du plan de la face 8. L'amplitude de la force appliquée est nulle au niveau du plan 13, puis elle est croissante. Il faut remarquer que la section du jonc 10 passant par le point A reste fixe par rapport au plan 12 pendant toute l'opération de rétreint.Unlike the prior art where simultaneous compression was carried out at all points on the external surface of the sleeve, according to the invention, between t and t 2 , continuous compression is carried out along annular zones of the sleeve, starting substantially from plane 13, up to around the plane of face 8. The amplitude of the applied force is zero at plane 13, then it is increasing. It should be noted that the section of the rod 10 passing through the point A remains fixed relative to the plane 12 during the entire necking operation.

On a montré dans la figure 3 en traits pleins la ferrure 2' après rétreint et on a rappelé par des traits pointillés sa configuration initiale. Le manchon et l'extrémité de fixation ont été référencés respectivement 3' et 4'. Sous l'effet du rétreint, le métal du manchon s'est écroui autour de l'extrémité 11' du jonc 10 dont les fibres ont été étirées uniquement dans la direction schématisée par la flèche 20. Les fibres ayant subi un allongement inférieur à la limite d'allongement élastique, le manchon ayant par ailleurs subi un allongement 21 de l'ordre de 6 % à 10 %, il est apparu une cavité entre les faces 7' et 8' au fond du logement du manchon 3'.FIG. 3 has shown in solid lines the fitting 2 ′ after shrinking and we have recalled by dotted lines its initial configuration. The sleeve and the fixing end have been referenced respectively 3 'and 4'. Under the effect of the constriction, the metal of the sleeve is hardened around the end 11 ′ of the rod 10 whose fibers have been drawn only in the direction shown diagrammatically by the arrow 20. The fibers having undergone an elongation less than the elastic elongation limit, the sleeve having moreover undergone an elongation 21 of the order of 6% to 10%, a cavity appeared between the faces 7 'and 8' at the bottom of the housing of the sleeve 3 '.

Les figures 4 et 5 montrent très schématiquement un dispositif permettant la mise en oeuvre du procédé qui vient d'être décrit.Figures 4 and 5 show very schematically a device for implementing the method which has just been described.

La partie gauche de la figure 4 montre le dispositif en position de départ (voir figure 1), tandis que la partie droite montre le dispositif après que l'opération de rétreint ait été effectuée (voir figure 3).The left part of Figure 4 shows the device in the starting position (see Figure 1), while the right part shows the device after the shrinking operation has been performed (see Figure 3).

Ce dispositif comporte huit secteurs curvilignes 41 à 48 ; l'un d'eux, le secteur 41 est vu en position finale et en position initiale dans la figure 4, tandis qu'ils sont tous vus dans la figure 5 sous les références 41' à 48' en position finale. Ces secteurs sont disposés radialement par rapport à l'axe 9 du jonc 10 et sont régulièrement répartis autour de cet axe.This device comprises eight curvilinear sectors 41 to 48; one of them, the sector 41 is seen in the final position and in the initial position in FIG. 4, while they are all seen in FIG. 5 under the references 41 'to 48' in the final position. These sectors are arranged radially with respect to the axis 9 of the rod 10 and are regularly distributed around this axis.

Une partie 51 de la face externe du secteur 41 constitue une zone de compression pour le rétreint. Il en est de même pour tous les autres secteurs. Ils sont tous susceptibles d'être animés d'un mouvement de rotation dans leurs plans respectifs, schématisé par les flèches 61 pour le secteur 41. L'ensemble des axes de rotation des secteurs se situe dans un plan orthogonal à l'axe du jonc 10.A part 51 of the external face of the sector 41 constitutes a compression zone for the constriction. The same is true for all other sectors. They are all likely to be driven by a rotational movement in their respective planes, shown diagrammatically by the arrows 61 for the sector 41. All the axes of rotation of the sectors are located in a plane orthogonal to the axis of the rod 10.

Le mouvement de translation 60 de la ferrure entraîné par le mouvement de rotation des secteurs est tel que la zone de compression d'un secteur s'applique successivement en tout point d'une zone du manchon correspondant à la largeur de la zone de compression.The translational movement 60 of the fitting caused by the rotary movement of the sectors is such that the compression zone of a sector is applied successively at any point in a zone of the sleeve corresponding to the width of the compression zone.

Comme on le voit sur la figure 5, la courbure transversale de la zone de compression des secteurs est sensiblement nulle. Cette disposition simplifie la fabrication des secteurs mais n'est pas obligatoire.As can be seen in FIG. 5, the transverse curvature of the sector compression zone is substantially zero. This provision simplifies the manufacturing of sectors but is not compulsory.

Le nombre de secteurs n'est bien entendu pas limité à huit ; il peut être modifié, par exemple en fonction du diamètre du manchon à rétreindre.The number of sectors is of course not limited to eight; it can be modified, for example as a function of the diameter of the sleeve to be shrunk.

Le profil longitudinal de la zone de compression est choisi en fonction de la force que l'on souhaite imprimer à telle ou telle zone annulaire du manchon.The longitudinal profile of the compression zone is chosen as a function of the force which it is desired to impart to this or that annular zone of the sleeve.

Comme on l'a déjà souligné, le procédé selon l'invention permet de préserver les fibres du jonc tout en assurant l'accrochage souhaité pour le jonc dans son manchon. Mais il faut noter encore l'avantage suivant, relatif à un isolateur organique comportant un jonc de longueur quelconque, deux ferrures rétreintes et un revêtement isolant éventuellement muni d'ailettes. Il ressort des figures 1 et 3 que la distance entre les plans « d'entrée des deux ferrures n'est pas modifiée par le procédé selon l'invention. Il est donc possible de disposer le jonc et ses ferrures, directement et sans réglage, dans un moule pour réaliser un revêtement isolant monobloc.As already pointed out, the method according to the invention makes it possible to preserve the fibers of the rod while ensuring the desired attachment for the rod in its sleeve. However, the following advantage should also be noted, relating to an organic insulator comprising a rod of any length, two constricted fittings and an insulating coating possibly provided with fins. It appears from Figures 1 and 3 that the distance between the planes "entry of the two fittings is not changed by the method according to the invention. It is therefore possible to place the rod and its fittings, directly and without adjustment, in a mold to produce a one-piece insulating coating.

Claims (6)

1. A method of fixing a sleeve of malleable metal (3) on a rod (10) of composite material, said sleeve comprising a cylindrical internal housing (6) which receives an end (11) of said rod, method in which a compression operation is performed causing the sleeve to be stretched, characterized in that said compression operation is carried out in a continuous manner by means of tools whose points of radial contact with the sleeve (3) are regularly distributed over an annular zone thereof and move substantially from the inlet of the sleeve and substantially up to the end of the rod (10) in such a manner as to press the metal of.the sleeve around the rod without stretching the composite material beyond its elastic strain limit.
2. A method according to claim 1, characterized in that the compression force varies depending on the annular zones under consideration.
3. An electrical insulator comprising a rod (10) of composite material and at least one end fitting (2) including a sleeve (3) characterized in that said rod is fixed in said sleeve by the method - according to claim 1 or 2.
4. An electrical insulator according to claim 3, characterized in that said inlet to the sleeve includes a lip (5) which is not pressed onto the rod (10).
5. An electrical insulator according to claim 3, characterized in that the metal of said sleeve (3) is chosen from steel, an aluminium alloy, an aluminium bronze.
6. An electrical insulator according to claim 3, characterized in that said composite material is constituted by synthetic resin bonded glass fibers.
EP84101546A 1983-02-22 1984-02-16 Process for fixing a malleable metallic jacket to a rod of composite material, and insulator produced by carrying out this process Expired EP0119467B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101546T ATE25166T1 (en) 1983-02-22 1984-02-16 METHOD OF FIXING A FORGEABLE METAL SLEEVE ON A COMPOSITE ROD AND INSULATOR OBTAINED BY THE PERFORMANCE OF THIS METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8302853A FR2541501B1 (en) 1983-02-22 1983-02-22 PROCESS FOR FIXING A TAPERED METAL SLEEVE ON A JOINT OF COMPOSITE MATERIAL
FR8302853 1983-02-22

Publications (2)

Publication Number Publication Date
EP0119467A1 EP0119467A1 (en) 1984-09-26
EP0119467B1 true EP0119467B1 (en) 1987-01-21

Family

ID=9286150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101546A Expired EP0119467B1 (en) 1983-02-22 1984-02-16 Process for fixing a malleable metallic jacket to a rod of composite material, and insulator produced by carrying out this process

Country Status (14)

Country Link
US (1) US4656720A (en)
EP (1) EP0119467B1 (en)
JP (1) JPS59163035A (en)
AT (1) ATE25166T1 (en)
AU (1) AU569867B2 (en)
BR (1) BR8400786A (en)
CA (1) CA1264531A (en)
DE (1) DE3462197D1 (en)
ES (1) ES529922A0 (en)
FR (1) FR2541501B1 (en)
MX (1) MX159352A (en)
NO (1) NO164565C (en)
NZ (1) NZ207222A (en)
ZA (1) ZA841263B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604821B1 (en) * 1986-10-02 1990-01-12 Ceraver COMPOSITE INSULATOR WITH OVER-MOLDED INSULATING COATING
US5233132A (en) * 1986-10-02 1993-08-03 Sediver Societe Europeenne D'isolateurs En Composite insulator comprising a fiber-resin rod and an insulating coating molded thereover
US6544286B1 (en) * 2000-07-18 2003-04-08 Tissue Engineering Refraction, Inc. Pre-fabricated corneal tissue lens method of corneal overlay to correct vision
GB0414131D0 (en) 2004-06-24 2004-07-28 Tyco Electronics Raychem Irela A method of manufacturing a crimped assembly, and related apparatuses
CN103639652B (en) * 2013-11-26 2016-03-16 常熟市福熙机械零部件制造有限公司 The production technology of high temperature resistant securing member

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE495241C (en) * 1927-08-17 1930-04-04 Reinhold Pfundt Method for attaching fittings to insulating bodies
DE909954C (en) * 1939-12-07 1954-04-26 Aeg Device for attaching fittings to insulating bodies
DE1400003A1 (en) * 1956-05-07 1968-10-10 British Insulated Callenders Method for producing a tensile strength connection between a metal fitting and a smooth cylindrical rod or tube made of fiberglass-reinforced synthetic material
GB816926A (en) * 1956-05-07 1959-07-22 British Insulated Callenders Method of attaching fittings to rods or tubes of resin-bonded fibre and fittings attached to such rods or tubes
FR1241157A (en) * 1959-07-21 1960-09-16 Grands Travaux De Marseille Sa Method and apparatus for producing anchor heads on a cable, whether or not stretched, or on a bar
US3549790A (en) * 1969-03-27 1970-12-22 Anderson Electric Corp Strain insulator
JPS5633538B2 (en) * 1974-03-25 1981-08-04
JPS5286968A (en) * 1976-01-14 1977-07-20 Fuji Machine Mfg Method and device for making turnbuckle body
JPS5411337A (en) * 1977-06-24 1979-01-27 Koromensukii Zabuodo Tekusuchi Permanent connection bitween parts of pipe stopper mold
JPS6054730B2 (en) * 1978-03-02 1985-12-02 日本碍子株式会社 Synthetic resin insulator
JPS5598418A (en) * 1979-01-20 1980-07-26 Ngk Insulators Ltd Synthetic resin insulator

Also Published As

Publication number Publication date
DE3462197D1 (en) 1987-02-26
AU569867B2 (en) 1988-02-25
FR2541501A1 (en) 1984-08-24
JPS59163035A (en) 1984-09-14
NO840618L (en) 1984-08-23
ZA841263B (en) 1984-09-26
US4656720A (en) 1987-04-14
BR8400786A (en) 1984-09-25
AU2477084A (en) 1984-08-30
ATE25166T1 (en) 1987-02-15
ES8501564A1 (en) 1984-11-16
NO164565B (en) 1990-07-09
JPH021570B2 (en) 1990-01-12
NO164565C (en) 1990-10-17
CA1264531A (en) 1990-01-23
EP0119467A1 (en) 1984-09-26
NZ207222A (en) 1987-02-20
ES529922A0 (en) 1984-11-16
MX159352A (en) 1989-05-17
FR2541501B1 (en) 1985-08-02

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