EP0044795A2 - Sizing tool for expanding tube ends - Google Patents

Sizing tool for expanding tube ends Download PDF

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Publication number
EP0044795A2
EP0044795A2 EP81420105A EP81420105A EP0044795A2 EP 0044795 A2 EP0044795 A2 EP 0044795A2 EP 81420105 A EP81420105 A EP 81420105A EP 81420105 A EP81420105 A EP 81420105A EP 0044795 A2 EP0044795 A2 EP 0044795A2
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EP
European Patent Office
Prior art keywords
jaws
expansion head
socket
expansion
sleeve
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
EP81420105A
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German (de)
French (fr)
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EP0044795A3 (en
EP0044795B1 (en
Inventor
Daniel Filliat
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Unicum Sa SA
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Unicum Sa SA
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Publication date
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Priority to AT81420105T priority Critical patent/ATE11115T1/en
Publication of EP0044795A2 publication Critical patent/EP0044795A2/en
Publication of EP0044795A3 publication Critical patent/EP0044795A3/en
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Publication of EP0044795B1 publication Critical patent/EP0044795B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/02—Enlarging
    • B21D41/026—Enlarging by means of mandrels

Definitions

  • the invention relates to an expansion head for an apparatus for flaring or widening the ends of tubes or the like.
  • Apparatuses for flaring the ends of the tubes corresponding to the preamble of claim 1 are known (French Patents 2,300,638 - 2,379,333 - 2,332,082 - 2,371,981) and comprising a body with means of displacement by cam and lever '' a mandrel whose conical end acts in thrust in the corresponding bore of a plurality of jaws in the form of sectors connected together by an elastic means to form an expansion head, capable of cooperating externally with the ends of the tubes to flare.
  • the expansion head thus formed is provided with a terminal support flange in the bottom of the bore, with a socket fixedly mounted at the end of the body.
  • Such devices and in particular their expansion heads have drawbacks caused by the positioning and the very conformation of the elastic means ensuring the retention of the jaws between them.
  • This elastic means is housed and positioned in a groove formed circularly at the periphery of the collar of the sleeve, so that it considerably limits the dimensioning of the jaws of the expansion head for the same sleeve. It is necessary to have several ranges of sockets corresponding to different ranges of dimensions of the jaws of the expansion head, and this results in a significant cost and storage.
  • Another major disadvantage is caused by the technological configuration of the elastic medium which does not allow a énontage d and easy reassembly of the entire p former head has nsion for exchange or repair of one or bit of said head, both on site and in the factory.
  • the various known elastic means exert their retaining action in a circumferential and linear manner around the jaw games, thereby causing an imbalance of the applied forces which always tends to reject the jaws relative to each other.
  • the invention as characterized in the claims overcomes these drawbacks and is remarkable in that the elastic jaw retaining means is positioned in a circular groove established below the common flange of each jaw, to allow a wide range of jaw dimensions with the same socket.
  • the expansion head has a retractable elastic retaining means with respect to the bottom of the sleeve, to allow its displacement in expansion or shrinkage, by the action of the mandrel, and also its disassembly.
  • the elastic means ensuring the retention of the jaws therebetween is an open spring having a flat bearing face, so as to no longer exert a linear circumferential action on the entire set of jaws, but an action circumferential surface forming scope, to allow perfect stability of the jaws during disassembly or reassembly.
  • the opening or slit of the aforementioned spring further authorizes the introduction of a clamp, with a view to its spacing for mounting or dismounting.
  • this apparatus comprises a body (1) with means of displacement by cam (2) and lever (2) of a mandrel (3) whose conical end (3) acts in thrust on an expansion head (T) housed inside a bushing (4) fixed at the end of the body (1 ).
  • the sleeve (4) is tapped at (4 1 ) to be screwed onto the external thread (1) of the body (1).
  • the lower part of the sleeve (4) is pierced at (4 2 ) with a hole of diameter smaller than said internal thread, to form a shoulder (4 3 ) allowing positioning, passage and the overflow of the expansion head (T).
  • the expansion head (T) is produced from several jaws (5), FIG. 3, generally six, in the form of sectors, which have, from their common internal edge (5 1 ), recesses (5 2 ) flared from their lower end, to form, after circular positioning of the sectors, a conical bore (5 3 ), Figures 1 and 2.
  • the different jaws (5) are held circularly between them by an elastic member (0).
  • the elastic means (0) for holding the jaws (5) is positioned in a circular groove (5 4 ) established below an externally squared edge (5 5 ), of small diameter, common to each jaw , to constitute, after their circular coaxial mounting, a support flange on the shoulder (4 3 ) of the sleeve (4). This arrangement allows a wide range of jaw dimensions with the same socket.
  • the elastic means for retaining (0) the jaws (5) is a spring (6) with at least one flat bearing face (6) intended to cooperate with the corresponding bottom (5 6 ) of the groove (5 4 ) which constitutes a flat surface. It follows that the flat support face (6 1 ) of the spring, in combination with the bottom of the groove (5 4 ), determines a support along a peripheral surface forming a scope for self-centering and stable positioning in height of the jaws (5), thereby avoiding an imbalance in all directions, in particular during assembly (assembly or disassembly) o
  • the spring (6) is open at (6 2 ) to give it a certain diametrical expansion when the mandrel (3) is pressed into the resulting bore (5 3 ) of the jaw assembly (5), with a view to their possible spacing.
  • the opening (6 2 ) of the spring (6) allows the introduction of a clamp specially shaped to allow its spacing relative to the set of jaws, for its assembly and / or disassembly.
  • the spring (6) always with an internal planar support face, may not be open, on the sole condition that it is made of a material capable of undergoing a diametrical expansion by elasticity in particular, with a view to a. assembly and disassembly on the one hand, and on the other hand so as not to hinder the spacing of the jaws (5).
  • an elastic member (A) suitably profiled for, 6 ′ on the one hand being centered in an external groove (5 7 ) common to the jaws (5), and on the other hand, projecting alternately from the external diameter of the head (T), in order to ensure its axial retention in combination with the underside (4 4 ) of the sleeve (4) and the support flange (5 5 ) of said jaws (5).
  • the elastic member (A) is an open pin spring (7), of pentagonal shape ( Figures 1 and 2), the sides (7 1 ) of which are centered and positioned in the groove (5 7 ) and whose projecting vertices (7 2 ) project beyond the outside diameter of the socket (4) to be applied to the underside (4 4 ) of said socket (4), Figures 4 and 6, when the flange ( 5 5 ) is supported on the shoulder (4 3. ) Of the sleeve (4). It is obvious that the groove (5 7 ) is machined at a distance (d) from below the collar (5 5 ), equal to the depth of the hole (4 2 ) of the sleeve (4). There is therefore no clearance at height ( Figures 4 and 5).
  • the pin spring (7) is open at (7 3 ) so as not to harm the diametrical expansion of the jaws (5); for this purpose, in a preferred manner, the spring (7) is split in line with one of its vertices (72).
  • the pentagonal shape of the spring (7) is preferred although not limiting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Earth Drilling (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Paper (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Endoscopes (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Lubricants (AREA)
  • Ceramic Products (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Pipe Accessories (AREA)
  • Joints Allowing Movement (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

1. Expansion head for an apparatus for flaring up or widening the ends of tubes, comprising essentially a body (1) with shifting means (2-2**1 ) for a chuck (3) the tapering end (3**1 ) of which is acting urgingly within the corresponding bore (5**3 ) of a plurality of independent concentric jaws (5) in the form of sectors interconnected by a retaining elastic means (O) positioned within a circular groove (5**4 ) established underneath the common colla (5**5 ) for each one of the aforesaid jaws (5) in order to constitute the expansion head proper, the collar (5**5 ) of which is abutted within the shouldered bore (4**3 ) of a socket (4) secured at the end of the body (1), characterized in that all the retaining means (O and A) of the jaws (5) are disposed underneath their common collar (5**5 ) to permit an extensive range of dimensions of the jaws (5) with the same socket (4), the elastic but collapsible means (A) of said jaws (5) relative to the bottom of said socket (4) being centered and positioned within a groove (5**7 ) of the aforesaid jaws (5) while protruding alternately from the external diameter of the expansion head (T) for retaining same axially and vertically in combination on the one hand with the lower face (4**4 ) of the socket (4) and on the other hand with the opposite collar (5**5 ) abutted on the inside shouldering (4**3 ) of said socket (4).

Description

L'invention concerne une tête d'expansion pour un appareil destiné à évaser ou à élargir les extrémités des tubes ou similaires.The invention relates to an expansion head for an apparatus for flaring or widening the ends of tubes or the like.

On connaît des appareils pour évaser les extrémités des tubes correspondant au préambule de la revendication 1 (Brevets Français 2.300.638 - 2.379.333 - 2.332.082 - 2.371.981) et comprenant un corps avec des moyens de déplacement par came et levier d'un mandrin dont l'extrémité conique agit en poussée dans l'alésage correspondant d'une pluralité de mors sous forme de secteurs reliés entre eux par un moyen élastique pour constituer une tête d'expansion, susceptible de coopérer extérieurement avec les extrémités des tubes à évaser. Le plus souvent, la tête d'expansion ainsi formée, est munie d'une collerette terminale d'appui dans le fond de l'alésage, d'une douille montée fixement en bout du corps.Apparatuses for flaring the ends of the tubes corresponding to the preamble of claim 1 are known (French Patents 2,300,638 - 2,379,333 - 2,332,082 - 2,371,981) and comprising a body with means of displacement by cam and lever '' a mandrel whose conical end acts in thrust in the corresponding bore of a plurality of jaws in the form of sectors connected together by an elastic means to form an expansion head, capable of cooperating externally with the ends of the tubes to flare. Most often, the expansion head thus formed is provided with a terminal support flange in the bottom of the bore, with a socket fixedly mounted at the end of the body.

De tels appareils et notamment leurs têtes d'expansion présentent des inconvénients engendrés par le positionnement et la conformation même du moyen élastique assurant la retenue des mors entre eux. Ce moyen élastique est logé et positionné dans une gorge formée circulairement à la périphérie de la collerette de la douille, de sorte qu'il limite considérablement le dimensionnement des mors de la tête d'expansion pour une même douille. Il s'avère nécessaire d'avoir plusieurs gammes de douilles correspondant à différentes fourchettes de dimensions des mors de la tête d'expansion et il résulte de ce fait, un prix de revient et un stockage importants.Such devices and in particular their expansion heads have drawbacks caused by the positioning and the very conformation of the elastic means ensuring the retention of the jaws between them. This elastic means is housed and positioned in a groove formed circularly at the periphery of the collar of the sleeve, so that it considerably limits the dimensioning of the jaws of the expansion head for the same sleeve. It is necessary to have several ranges of sockets corresponding to different ranges of dimensions of the jaws of the expansion head, and this results in a significant cost and storage.

Un autre inconvénient majeur est occasionné par la conformation technologique du moyen élastique qui ne permet pas un dénontage et remontage faciles de l'ensemble de la tête d'ex- pansion pour l'échange ou la réparation de l'un ou des mors de ladite tête, aussi bien sur le chantier qu'en usine. En effet, les différents moyens élastiques connus exercent leur action de retenue de manière circonférentielle et linéaire autour des jeux de mors, en entraînant ainsi un déséquilibre des forces appliquées qui tend toujours à rejeter les mors les uns par rapport aux autres.Another major disadvantage is caused by the technological configuration of the elastic medium which does not allow a énontage d and easy reassembly of the entire p former head has nsion for exchange or repair of one or bit of said head, both on site and in the factory. Indeed, the various known elastic means exert their retaining action in a circumferential and linear manner around the jaw games, thereby causing an imbalance of the applied forces which always tends to reject the jaws relative to each other.

L'invention telle qu'elle est caractérisée dans les revendications remédie à ces inconvénients et est remarquable en ce que le moyen élastique de retenue des mors est positionné dans une gorge circulaire établie au-dessous de la collerette commune de chaque mors, pour autoriser une gamme étendue de dimensions de mors avec la même douille.The invention as characterized in the claims overcomes these drawbacks and is remarkable in that the elastic jaw retaining means is positioned in a circular groove established below the common flange of each jaw, to allow a wide range of jaw dimensions with the same socket.

Suivant une autre caractéristique, la tête d'expansion présente un moyen de retenue élastique escamotable par rapport au fond de la douille, pour permettre son déplacement en expansion ou en retreinte, par l'action du mandrin,et également son démontage.According to another characteristic, the expansion head has a retractable elastic retaining means with respect to the bottom of the sleeve, to allow its displacement in expansion or shrinkage, by the action of the mandrel, and also its disassembly.

Suivant une autre caractéristique, le moyen élastique assurant la retenue des mors entre eux, est un ressort ouvert présentant une face d'appui plane, de manière à exercer non plus une action circonférentielle linéaire sur l'ensemble du jeu de mors, mais une action circonférentielle de surface formant portée, pour permettre une stabilité parfaite des mors lors d'un démontage ou d'un remontage. L'ouverture ou fente du ressort précité autorisant en outre l'introduction d'une pince, en vue de son écartement pour son montage ou démontage.According to another characteristic, the elastic means ensuring the retention of the jaws therebetween is an open spring having a flat bearing face, so as to no longer exert a linear circumferential action on the entire set of jaws, but an action circumferential surface forming scope, to allow perfect stability of the jaws during disassembly or reassembly. The opening or slit of the aforementioned spring further authorizes the introduction of a clamp, with a view to its spacing for mounting or dismounting.

Ces caractéristiques et d'autres encore ressortiront de la suite de la description.These characteristics and others will emerge from the following description.

Pour bien fixer l'objet de l'invention, sans toutefois le limiter, aux figures des dessins annexés :

  • La figure 1 est une vue en perspective, avant montage dans la douille d'une tête d'expansion selon l'invention, elle-même représentée avant le positionnement des différents moyens élastiques de retenue.
  • La figure 2 est une vue en perspective de la tête d'expansion seule, après montage des moyens élastiques de retenue.
  • La figure 3 est une vue en perspective de l'un des mors constituant après assemblage avec ses homologues, la tête d'expansion.
  • La figure 4 est une vue en coupe longitudinale montrant une tête d'expansion selon l'invention, logée dans une douille, avant son montage en bout du corps de l'appareil à évaser de tout type connu.
  • La figure 5 est une vue semblable à la figure 4, après montage de l'ensemble douille-tête d'expansion, en bout du corps de l'appareil.
  • La figure 6 est une vue en coupe transversale selon la ligne 6-6 de la figure 4.
  • La figure 7 est une vue en coupe transversale considérée selon la ligne 7-7 de la figure 5.
  • Les figures 8, 9 et 10 sont des vues partielles en coupe et à une échelle plus importante, montrant différentes formes d'exécution nullement limitatives du moyen élastique de retenue entre eux des mors.
To clearly define the object of the invention, without however limiting it, to the figures of the appended drawings:
  • Figure 1 is a perspective view, before mounting in the socket of an expansion head according to the invention, itself shown before the positioning of the various elastic retaining means.
  • Figure 2 is a perspective view of the expansion head alone, after mounting of the elastic retaining means.
  • Figure 3 is a perspective view of one of the jaws constituting after assembly with its counterparts, the expansion head.
  • Figure 4 is a longitudinal sectional view showing an expansion head according to the invention, housed in a socket, before mounting at the end of the body of the flaring apparatus of any known type.
  • Figure 5 is a view similar to Figure 4, after mounting of the expansion head-socket assembly, at the end of the body of the device.
  • Figure 6 is a cross-sectional view along line 6-6 of Figure 4.
  • Figure 7 is a cross-sectional view taken along line 7-7 of Figure 5.
  • Figures 8, 9 and 10 are partial sectional views on a larger scale, showing different embodiments in no way limiting the elastic means for retaining the jaws therebetween.

Selon la présente invention et dans l'exemple nullement limitatif illustré aux dessins, on voit notamment aux figures 4 et 5, un appareil de tout type connu, destiné à évaser des extrémités de tubes. Succinctement, cet appareil comprend un corps (1) avec des moyens de déplacement par came (2 ) et levier (2) d'un mandrin (3) dont l'extrémité conique (3 ) agit en poussée sur une tête d'expansion (T) logée à l'intérieur d'une douille (4) fixée en bout du corps (1). D'une manière connue, la douille (4) est taraudée en (41) pour être vissée sur le filetage extérieur (1 ) du corps (1). Coaxia- lement au taraudage (41), la partie inférieure de la douille (4) est percée en (42) d'un trou de diamètre inférieur audit taraudage, pour constituer un épaulement (43) autorisant le positionnement, le passage et le débordement de la tête d'expansion (T).According to the present invention and in the nonlimiting example illustrated in the drawings, we see in particular in Figures 4 and 5, an apparatus of any known type, intended to flare ends of tubes. Briefly, this apparatus comprises a body (1) with means of displacement by cam (2) and lever (2) of a mandrel (3) whose conical end (3) acts in thrust on an expansion head (T) housed inside a bushing (4) fixed at the end of the body (1 ). In a known manner, the sleeve (4) is tapped at (4 1 ) to be screwed onto the external thread (1) of the body (1). Coaxial with the internal thread (4 1 ), the lower part of the sleeve (4) is pierced at (4 2 ) with a hole of diameter smaller than said internal thread, to form a shoulder (4 3 ) allowing positioning, passage and the overflow of the expansion head (T).

La tête d'expansion (T) est réalisée à partir de plusieurs mors (5), figure 3, généralement six, sous forme de secteurs, qui présentent à partir de leur arête intérieure commune (51), des évidements (52) évasés à partir de leur extrémité basse, pour constituer, après positionnement circulaire des secteurs, un alésage conique (53), figures 1 et 2.The expansion head (T) is produced from several jaws (5), FIG. 3, generally six, in the form of sectors, which have, from their common internal edge (5 1 ), recesses (5 2 ) flared from their lower end, to form, after circular positioning of the sectors, a conical bore (5 3 ), Figures 1 and 2.

Comme on l'a vu précédemment, les différents mors (5) sont maintenus circulairement entre-eux par un organe élastique (0). Selon l'invention, le moyen élastique (0) de retenue des mors (5) est positionné dans une gorge circulaire (54) établie en dessous d'un rebord équerré extérieurement (55), de faible diamètre, commun à chaque mors, pour constituer, après leur Montage coaxial circulaire, une collerette d'appui sur l'épaulement (43) de la douille (4). Cette disposition autorise une gamme étendue de dimensions de mors avec la même douille.As seen above, the different jaws (5) are held circularly between them by an elastic member (0). According to the invention, the elastic means (0) for holding the jaws (5) is positioned in a circular groove (5 4 ) established below an externally squared edge (5 5 ), of small diameter, common to each jaw , to constitute, after their circular coaxial mounting, a support flange on the shoulder (4 3 ) of the sleeve (4). This arrangement allows a wide range of jaw dimensions with the same socket.

En effet, il est possible de réduire en épaisseur et en diamètre la collerette d'appui (55) puisque cette dernière n'est plus équipée, en opposition avec les réalisations antérieures connues, du moyen élastique de retenue (0) qui occupait une certaine place dans le fond du taraudage (41) de la douille (4) et nécessitait des dimensions suffisantes de la collerette pour son positionnement et centrage. Selon l'invention, il subsiste un jeu (j) suffisamment important pour couvrir les différentes gammes dimensionnelles de têtes d'expansion.Indeed, it is possible to reduce the thickness and diameter of the support flange (5 5 ) since the latter is no longer equipped, in opposition to the known prior embodiments, with the elastic retaining means (0) which occupied a some place in the bottom of the thread (4 1 ) of the sleeve (4) and required sufficient dimensions of the flange for its positioning and centering. According to the invention, there remains a clearance (j) large enough to cover the different dimensional ranges of expansion heads.

D'autre part, d'une manière particulièrement importante, le moyen élastique de retenue (0) des mors (5), est un ressort (6) avec au moins une face plane d'appui (6 ) destinée à coopérer avec le fond correspondant (56) de la gorge (54) qui constitue une surface plane. Il en résulte que la face plane d'appui (61) du ressort, en combinaison avec le fond de la gorge (54), détermine un appui suivant une surface périphérique formant portée pour l'auto-centrage et le positionnement stable en hauteur des mors (5), en leur évitant, par voie de conséquence, un déséquilibre dans tous les sens, notamment en cours d'assemblage (montage ou démontage)oOn the other hand, particularly importantly, the elastic means for retaining (0) the jaws (5), is a spring (6) with at least one flat bearing face (6) intended to cooperate with the corresponding bottom (5 6 ) of the groove (5 4 ) which constitutes a flat surface. It follows that the flat support face (6 1 ) of the spring, in combination with the bottom of the groove (5 4 ), determines a support along a peripheral surface forming a scope for self-centering and stable positioning in height of the jaws (5), thereby avoiding an imbalance in all directions, in particular during assembly (assembly or disassembly) o

A partir de cette conception de base du ressort (6) dont la seule condition nécessaire et suffisante est d'avoir une face interne d'appui plane (6'),plusieurs formes en section dudit ressort peuvent être envisagées, comme illustré nullement limitativement aux figures 8, 9 et 10. Le fond de la gorge (5 4) demeure toujours plan, en étant parallèle aux génératrices du corps de la tête d'expansion (T).From this basic design of the spring (6), the only necessary and sufficient condition of which is to have an internal flat support face (6 ′), several shapes in section of said spring can be envisaged, as illustrated in no way limited to Figures 8, 9 and 10. The bottom of the groove ( 5 4 ) always remains flat, being parallel to the generatrices of the body of the expansion head (T).

On voit également, notamment aux figures 1 et 2, que le ressort (6) est ouvert en (62) pour lui conférer une certaine expansion diamétrale lors de l'enfoncement du mandrin (3) dans l'alésage résultant (53) de l'assemblage des mors (5), en vue de leur écartement éventuel. De même, l'ouverture (62) du ressort (6) permet l'introduction d'une pince spécialement conformée pour autoriser son écartement par rapport au jeu de mors, en vue de son montage et/ou démontage.It can also be seen, in particular in FIGS. 1 and 2, that the spring (6) is open at (6 2 ) to give it a certain diametrical expansion when the mandrel (3) is pressed into the resulting bore (5 3 ) of the jaw assembly (5), with a view to their possible spacing. Similarly, the opening (6 2 ) of the spring (6) allows the introduction of a clamp specially shaped to allow its spacing relative to the set of jaws, for its assembly and / or disassembly.

Eventuellement, le ressort (6), avec toujours une face interne d'appui plane, peut ne pas être ouvert, à la seule condition qu'il soit réalisé en une matière susceptible de subir une expansion diamétrale par élasticité notamment, en vue d'un. montage et démontage d'une part, et d'autre part pour ne pas gêner l'écartement des mors (5).Optionally, the spring (6), always with an internal planar support face, may not be open, on the sole condition that it is made of a material capable of undergoing a diametrical expansion by elasticity in particular, with a view to a. assembly and disassembly on the one hand, and on the other hand so as not to hinder the spacing of the jaws (5).

Suivant l'invention on prévoit d'équiper la tête d'expansion (T) d'un moyen de retenue escamotable par rapport à la face de dessous (44) de la douille (4), tout en permettant son déplacement en expansion ou en retreinte, lors de l'action du mandrin (3), et également son démontage. Dans ce but, on utilise un organe élastique (A) convenablement profilé pour, 6' une part se centrer dans une gorge extérieure (57) commune aux mors (5), et d'autre part, déborder en alternance du diamètre extérieur de la tête (T), en vue d'assurer sa retenue axiale en combinaison avec la face de dessous (44) de la douille (4) et la collerette d'appui (55) desdits mors (5).According to the invention, provision is made to equip the expansion head (T) with a retractable retaining means with respect to the underside (4 4 ) of the sleeve (4), while allowing its displacement by expansion or in recess, during the action of the mandrel (3), and also its disassembly. For this purpose, we use an elastic member (A) suitably profiled for, 6 ′ on the one hand being centered in an external groove (5 7 ) common to the jaws (5), and on the other hand, projecting alternately from the external diameter of the head (T), in order to ensure its axial retention in combination with the underside (4 4 ) of the sleeve (4) and the support flange (5 5 ) of said jaws (5).

Selon une réalisation particulièrement intéressante, l'organe élastique (A) est un ressort ouvert en épingle (7), de forme pentagonale (figures 1 et 2), dont les côtés (71) sont centrés et positionnés dans la gorge (57) et dont les sommets en saillie (72) débordent du diamètre extérieur de la douille (4) pour s'appliquer sur la face de dessous (44) de ladite douille (4), figures 4 et 6, lorsque la collerette (55) est en appui sur l'épaulement (43.) de la douille (4). Il est bien évident que la gorge (57) est usinée à une distance (d) du dessous de la collerette (55), égale à la profondeur du.trou (42) de la douille (4). Il n'y a donc pas de jeu en hauteur (figures 4 et 5).According to a particularly advantageous embodiment, the elastic member (A) is an open pin spring (7), of pentagonal shape (Figures 1 and 2), the sides (7 1 ) of which are centered and positioned in the groove (5 7 ) and whose projecting vertices (7 2 ) project beyond the outside diameter of the socket (4) to be applied to the underside (4 4 ) of said socket (4), Figures 4 and 6, when the flange ( 5 5 ) is supported on the shoulder (4 3. ) Of the sleeve (4). It is obvious that the groove (5 7 ) is machined at a distance (d) from below the collar (5 5 ), equal to the depth of the hole (4 2 ) of the sleeve (4). There is therefore no clearance at height (Figures 4 and 5).

Comme précédemment indiqué, le ressort en épingle (7) est ouvert en (73) pour ne pas nuire à l'expansion diamétrale des mors (5) ; à cet effet, d'une manière préférée, le ressort (7) est fendu au droit de l'un de ses sommets (72). La forme pentagonale du ressort (7) est préférée quoique non limitative.As previously indicated, the pin spring (7) is open at (7 3 ) so as not to harm the diametrical expansion of the jaws (5); for this purpose, in a preferred manner, the spring (7) is split in line with one of its vertices (72). The pentagonal shape of the spring (7) is preferred although not limiting.

Il est bien évident que dans le cas de têtes d'expansion et de douilles de grandes dimensions, ces dernières peuvent coopérer avec une bague intercalaire susceptible d'être vissée en bout du corps (1) de l'appareil, de telles dispositions étant parfaitement connues pour l'homme de l'art.It is obvious that in the case of large expansion heads and sockets, the latter can cooperate with an intermediate ring capable of being screwed at the end of the body (1) of the device, such arrangements being perfectly known to those skilled in the art.

Les avantages de cette tête d'expansion ressortent bien de la description, on souligne en particulier :

  • - la possibilité d'utiliser la même douille pour plusieurs gammes dimensionnelles de jeux de mors, par suite des dimensions réduites de la collerette qui assure uniquement la retenue de la tête d'expansion à l'intérieur de la douille.
  • - l'auto-centrage et le positionnement stable en hauteur des mors, en leur évitant un déséquilibre dans tous les sens, conférés grâce à la face interne rigoureusement plane du ressort de retenue desdits mors.
  • - le maintien et le positionnement en hauteur de la tête d'expansion par rapport à la douille.
  • - les possibilités de séparer la tête d'expansion et la douille, sans enlever le moyen élastique reliant les mors entre eux.
The advantages of this expansion head appear clearly from the description, it is emphasized in particular:
  • - The possibility of using the same socket for several dimensional ranges of jaw sets, due to the reduced dimensions of the flange which only ensures the retention of the expansion head inside the socket.
  • - self-centering and stable positioning in height of the jaws, avoiding an imbalance in all directions, conferred by the strictly flat internal face of the spring for retaining said jaws.
  • - Maintaining and positioning the expansion head in height relative to the socket.
  • - The possibilities of separating the expansion head and the socket, without removing the elastic means connecting the jaws to each other.

Claims (6)

1. Tête d'expansion pour appareil destiné à évaser ou à élargir les extrémités des tubes, comprenant essentiellement un corps (1) avec moyens de déplacement (2 - 21) d'un mandrin (3) dont l'extrémité conique (31) agit en poussée dans l'alésage correspondant (53) d'une pluralité de mors concentriques, indépendants (5), sous forme de secteurs reliés par un moyen élastique (0), pour constituer la tête d'expansion (T) avec collerette d'appui (5 5) dans l'alésage épaulé (43) d'une douille (4) fixée en bout du corps (1) de l'appareil, ladite tête d'expansion étant caractérisée en ce qu'elle comprend un moyen élastique (o) de retenue des mors, qui est positionné dans une gorge circulaire (5 ) établie au-dessous de la collerette commune (55) de chaque mors (5), pour autoriser une gamme étendue de dimensions de mors avec la même douille ; ladite tête présentant en outre un moyen de retenue élastique escamotable (a) par rapport au fond de ladouille (4), tout en permettant d'une part, son déplacement en expansion ou en retreinte par l'action du mandrin (3), et d'autre part, son démontage. 1 . Expansion head for apparatus intended for flaring or widening the ends of the tubes, essentially comprising a body (1) with means for moving (2 - 2 1 ) a mandrel (3) whose conical end (3 1 ) acts in thrust in the corresponding bore (5 3 ) of a plurality of concentric, independent jaws (5), in the form of sectors connected by elastic means (0), to constitute the expansion head (T) with flange support ( 5 5 ) in the stepped bore (4 3 ) of a socket (4) fixed at the end of the body (1) of the device, said expansion head being characterized in that it comprises a elastic jaw retaining means (o) which is positioned in a circular groove (5) established below the common flange (5 5 ) of each jaw (5), to allow a wide range of jaw dimensions with the same socket; said head further having a retractable elastic retaining means (a) relative to the bottom of the socket (4), while allowing, on the one hand, its displacement in expansion or shrinkage by the action of the mandrel (3), and on the other hand, its disassembly. 2. Tête d'expansion selon 1, caractérisée en ce que le moyen de retenue (o) des mors (5) est un ressort annulaire ouvert (6) avec au moins une surface plane d'appui (61) coopérant avec le fond correspondant (56)de la gorge (54), pour obtenir un appui suivant une surface périphérique formant portée pour l'auto-centrage et le positionnement stable en hauteur des dits mors (5), en leur évitant un déséquilibre dans tous les sens, notamment en cours d'assemblage.2. Expansion head according to 1, characterized in that the retaining means (o) of the jaws (5) is an open annular spring (6) with at least one flat bearing surface (6 1 ) cooperating with the bottom corresponding (5 6 ) of the groove (5 4 ), to obtain a support along a peripheral surface forming a bearing for self-centering and stable positioning in height of said jaws (5), avoiding an imbalance in all sense, especially during assembly. 3. Tête d'expansion selon 1, caractérisée en ce que le moyen de retenue élastique escamotable (a) des mors (5) par rapport à la douille (4), est conformé et convenablement profilé pour d'une part, se centrer et se positionner dans une gorge (5 ) commune auxdits mors (5), et d'autre part, déborder en alternance du diamètre extérieur de la tête, en vue d'assurer sa retenue axiale en hauteur, en combinaison avec la face de dessous (44) de la douille (4) et la collerette (55) en appui sur l'épaulement (43) de la douille (4).3. Expansion head according to 1, characterized in that the retractable elastic retaining means (a) of the jaws (5) relative to the sleeve (4), is shaped and suitably profiled to, on the one hand, center and position in a groove (5) common to said jaws (5), and on the other hand, alternately extend beyond the outside diameter of the head, in order to ensure its axial retention in height, in combination with the bottom face ( 4 4 ) of the sleeve (4) and the flange (5 5 ) resting on the shoulder (4 3 ) of the sleeve (4). 4. Tête d'expansion selon 1 et 3, caractérisée en ce que le moyen de retenue élastique escamotable (a) des mors (5) par rapport à la douille (4), est un ressort en épingle ouvert (7) de forme pentagonale, dont les côtés (71) sont centrés et positionnés dans la gorge (57) et dont les sommets en saillie (72) débordent du diamètre extérieur de la douille pour s'appliquer sur la face de dessous (44) de ladite douille (4).4. Expansion head according to 1 and 3, characterized in that the retractable elastic retaining means (a) of the jaws (5) relative to the sleeve (4), is an open pin spring (7) of pentagonal shape , whose sides (7 1 ) are centered and positioned in the groove (5 7 ) and whose projecting vertices (7 2 ) project beyond the outside diameter of the sleeve to be applied on the bottom face (4 4 ) of said socket (4). 5. Tête d'expansion selon 1 et 2, caractérisée en ce que le ressort (6) est ouvert en (62) en autorisant notamment l'introduction d'une pince appropriée pour écarter ledit ressort du jeu des mors (5), en vue de son montage ou démontage.5. Expansion head according to 1 and 2, characterized in that the spring (6) is open at (6 2 ), in particular authorizing the introduction of a suitable clamp to separate said spring from the set of jaws (5), for assembly or disassembly. 6. Tête d'expansion selon 1 et 2, caractérisée en ce que le fond de la gorge (54) est plan en étant parallèle aux génératrices du corps de ladite tête d'expansion.6. Expansion head according to 1 and 2, characterized in that the bottom of the groove (5 4 ) is plane while being parallel to the generatrices of the body of said expansion head.
EP81420105A 1980-07-18 1981-07-16 Sizing tool for expanding tube ends Expired EP0044795B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81420105T ATE11115T1 (en) 1980-07-18 1981-07-16 EXPANDING HEAD FOR EXPANDING PIPE ENDS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8016173 1980-07-18
FR8016173A FR2486834A1 (en) 1980-07-18 1980-07-18 EXPANSION HEAD FOR AN APPARATUS FOR EXHAUSTING OR EXTENDING TUBES OR THE LIKE

Publications (3)

Publication Number Publication Date
EP0044795A2 true EP0044795A2 (en) 1982-01-27
EP0044795A3 EP0044795A3 (en) 1982-05-12
EP0044795B1 EP0044795B1 (en) 1985-01-09

Family

ID=9244417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420105A Expired EP0044795B1 (en) 1980-07-18 1981-07-16 Sizing tool for expanding tube ends

Country Status (10)

Country Link
EP (1) EP0044795B1 (en)
AT (1) ATE11115T1 (en)
BE (1) BE889656A (en)
CH (1) CH641383A5 (en)
DE (2) DE3168139D1 (en)
DK (1) DK309481A (en)
FI (1) FI812242L (en)
FR (1) FR2486834A1 (en)
IT (1) IT1138063B (en)
NO (1) NO153720C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206835A3 (en) * 1985-06-26 1987-01-28 Westinghouse Electric Corporation Apparatus and method for reforming and rolling deformed ends of tubes
DE4202348C1 (en) * 1992-01-29 1993-06-09 Rothenberger Werkzeuge-Maschinen Gmbh, 6233 Kelkheim, De Tube end expansion tool - has holding drillings for guide pins at inner and outer flange sectors
CH699306A1 (en) * 2008-08-13 2010-02-15 Finemon Ag Flaring tool for pipes and pipe pressing clutch.
DE202010004948U1 (en) 2010-04-13 2011-09-01 Rehau Ag + Co. Expander head for hollow workpieces with guided segments
WO2013113509A1 (en) 2012-02-03 2013-08-08 Rehau Ag + Co Expansion head for expansion tools, expansion tool comprising said expansion head and use thereof
DE202012104450U1 (en) 2012-11-19 2014-02-25 Rehau Ag + Co Expansion head for expansion tools and this comprehensive expansion tool
DE202019107067U1 (en) * 2019-12-18 2021-03-19 Rehau Ag + Co Expansion head for expansion tools as well as this comprehensive expansion tool

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106584877B (en) * 2016-12-09 2023-05-30 重庆寅悦恒工贸有限公司 Pipe fitting centering mechanism for vehicle

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6949442U (en) * 1969-07-18 1970-05-06 Dale Ltd John CONICAL SPREADER FOR EXPANDING TUBES.
US3888102A (en) * 1972-10-10 1975-06-10 Salvatore A Nigido Swedger apparatus
FR2300638A1 (en) * 1975-02-13 1976-09-10 Rothenberger Gmbh Co Maschinen DEVICE FOR FLARING PIPING ENDS
FR2332082A1 (en) * 1975-11-24 1977-06-17 Rothenberger Gmbh Co HAND TOOL FOR ENLARGING THE ENDS OF PIPING TUBES
FR2371981A1 (en) * 1976-11-29 1978-06-23 Rothenberger Gmbh Co

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6949442U (en) * 1969-07-18 1970-05-06 Dale Ltd John CONICAL SPREADER FOR EXPANDING TUBES.
US3888102A (en) * 1972-10-10 1975-06-10 Salvatore A Nigido Swedger apparatus
FR2300638A1 (en) * 1975-02-13 1976-09-10 Rothenberger Gmbh Co Maschinen DEVICE FOR FLARING PIPING ENDS
FR2332082A1 (en) * 1975-11-24 1977-06-17 Rothenberger Gmbh Co HAND TOOL FOR ENLARGING THE ENDS OF PIPING TUBES
FR2371981A1 (en) * 1976-11-29 1978-06-23 Rothenberger Gmbh Co

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206835A3 (en) * 1985-06-26 1987-01-28 Westinghouse Electric Corporation Apparatus and method for reforming and rolling deformed ends of tubes
DE4202348C1 (en) * 1992-01-29 1993-06-09 Rothenberger Werkzeuge-Maschinen Gmbh, 6233 Kelkheim, De Tube end expansion tool - has holding drillings for guide pins at inner and outer flange sectors
EP0619152A1 (en) * 1992-01-29 1994-10-12 Rothenberger Werkzeuge-Maschinen Gmbh Expansion head for expander for hollow workpieces
CH699306A1 (en) * 2008-08-13 2010-02-15 Finemon Ag Flaring tool for pipes and pipe pressing clutch.
DE202010004948U1 (en) 2010-04-13 2011-09-01 Rehau Ag + Co. Expander head for hollow workpieces with guided segments
WO2011128049A1 (en) 2010-04-13 2011-10-20 Rehau Ag + Co Expansion head for expansion tools and expansion tool comprising said expansion head
AU2011240323B2 (en) * 2010-04-13 2014-12-11 REHAU Industries SE & Co. KG Expansion head for expansion tools and expansion tool comprising said expansion head
AU2011240323C1 (en) * 2010-04-13 2015-04-02 REHAU Industries SE & Co. KG Expansion head for expansion tools and expansion tool comprising said expansion head
WO2013113509A1 (en) 2012-02-03 2013-08-08 Rehau Ag + Co Expansion head for expansion tools, expansion tool comprising said expansion head and use thereof
DE102012100894A1 (en) 2012-02-03 2013-08-08 Rehau Ag + Co Expander head for expander tools, this comprehensive expansion tool and their use
DE202012104450U1 (en) 2012-11-19 2014-02-25 Rehau Ag + Co Expansion head for expansion tools and this comprehensive expansion tool
DE202019107067U1 (en) * 2019-12-18 2021-03-19 Rehau Ag + Co Expansion head for expansion tools as well as this comprehensive expansion tool

Also Published As

Publication number Publication date
DE3168139D1 (en) 1985-02-21
EP0044795A3 (en) 1982-05-12
BE889656A (en) 1981-11-16
ATE11115T1 (en) 1985-01-15
NO153720B (en) 1986-02-03
IT1138063B (en) 1986-09-10
FR2486834B1 (en) 1985-04-05
DE44795T1 (en) 1983-08-04
DK309481A (en) 1982-01-19
IT8122943A0 (en) 1981-07-15
FR2486834A1 (en) 1982-01-22
NO812413L (en) 1982-01-19
EP0044795B1 (en) 1985-01-09
FI812242L (en) 1982-01-19
NO153720C (en) 1986-05-14
CH641383A5 (en) 1984-02-29

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