EP0077700A1 - Method for the local deforming of round tubes into tubes with flat sides, and die for doing the same - Google Patents

Method for the local deforming of round tubes into tubes with flat sides, and die for doing the same Download PDF

Info

Publication number
EP0077700A1
EP0077700A1 EP82401761A EP82401761A EP0077700A1 EP 0077700 A1 EP0077700 A1 EP 0077700A1 EP 82401761 A EP82401761 A EP 82401761A EP 82401761 A EP82401761 A EP 82401761A EP 0077700 A1 EP0077700 A1 EP 0077700A1
Authority
EP
European Patent Office
Prior art keywords
tube
punch
matrix
faces
tubes
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
EP82401761A
Other languages
German (de)
French (fr)
Other versions
EP0077700B1 (en
Inventor
Alain Herbulot
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.)
Peugeot Cycles SA
Original Assignee
Peugeot Cycles SA
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 Peugeot Cycles SA filed Critical Peugeot Cycles SA
Publication of EP0077700A1 publication Critical patent/EP0077700A1/en
Application granted granted Critical
Publication of EP0077700B1 publication Critical patent/EP0077700B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21D15/00—Corrugating tubes
    • B21D15/02—Corrugating tubes longitudinally

Definitions

  • Tubes used in industry generally have a circular section because of the ease of their continuous production, from strip rolls, on a tube machine and also because of their mechanical qualities.
  • this circular shape poses problems when one wants to perform certain operations such as drilling a tube, welding it with other parts, docking it with other tubes, and in particular assembling several similar tubes of so as to allow them to lead into another tube of larger section.
  • the object of the present invention is to remedy these drawbacks by making it possible to form local flat surfaces on the tube.
  • the subject of this invention is in fact a method of locally deforming a round tube into a tube of substantially triangular cross section, according to which an elongated punch comprising a dihedral between two guide faces is inserted axially into the tube, to lay the portion of tube to be deformed, containing the punch, on the side walls of a V-shaped groove on the upper face of a die, then to be applied to the external free surface of the tube a compression part, also provided with a groove, and tightening it until it comes into contact with the die and the penetration of the tube and the punch into the bottom of the V-groove, so that the portion of tube follows the outline of the space delimited between the grooves of the matrix and of the compression part, the section of which is substantially triangular; finally we move aside the compression part and the matrix and we withdraw the punch from the tube.
  • the tube thus produced has, over a portion of its length only, a substantially triangular section, but only its shape has been modified so that its mechanical qualities have not been altered but that on the other hand its adaptation to be fixed or accosted to other parts is clearly improved.
  • the invention also extends to a forming tool or punch, intended for the implementation of this method, which comprises a dihedron with a determined angle between two narrow guide and centering faces, the edges of the dihedron and of the ends of the two lateral faces being generators of the same cylinder.
  • the tool comprises, opposite the edge of the dihedron, a curved surface whose axis coincides with this edge.
  • the cylinder on which the edges of the tool are placed having a diameter very slightly smaller than that of the tube to be deformed, the tool can easily be inserted inside this tube to the desired point, and even removed from it. tube after its deformation. It is also always perfectly centered in the tube and can easily be centered in relation to the matrix.
  • Figures 1 and 2 illustrate a particularly interesting application of the invention. They indeed show three tubes of circular section, 1, 2 and 3, which are arranged parallel side by side in the extension of a tube 4 of larger diameter. Each of the tubes 1, 2 and 3 is deformed at its end close to the tube 4 so as to have two flat faces, respectively 6.7, 8.9, and 10.11, capable of being approached each against the corresponding face of one of the other two tubes.
  • the two flat faces 6, 7 are joined by a curved surface in a portion of a circle 12, the diameter of which is greater than that of the initial tube 1, 2 or 3, each of the surfaces 12 forming a third of a circle, so that the set of three deformed tubes 1, 2 and 3 is delimited externally by a circumference constituted by the succession of the three surfaces 12, as shown more clearly in FIG. 2.
  • the outside diameter of the assembly of the three deformed tubes is equal to, or preferably slightly less than, the internal diameter of the tube 4, so that the three tubes 1, 2 and 3 can easily be connected to this tube 4 and lead to the inside.
  • the deformation is obtained by means of a forming tool, or punch, such as that shown in FIG. 6.
  • This punch 18 is formed from a solid metal bar, of circular section having a neighboring radius or very slightly less than the internal radius of the tube to be deformed, for example the tube 1 in FIG. 4.
  • This punch 18 has two flat faces, respectively 20 and 22, intersecting on an edge 23 and thus forming a dihedron whose angle corresponds to that which one wishes to obtain on the tube 1.
  • Each of the planar faces 20 and 22 joins a portion of cylinder 24, 26 respectively, of the initial bar and the edge 23 of the dihedron formed by the faces 20 and 22 is located practically on a generator of the cylinder of the outer surface of this bar. Consequently, the edges 27, 28 and 29, 30 of the lateral faces 24 and 26, and the edge 23 of the dihedral constitute the generatrices of the same cylinder.
  • the lateral faces 24 and 26 are connected by a surface 32, also curved, but having its axis coincident with the edge 23.
  • the punch 18 can receive any desired length but its cross section remains inscribed in a circle of diameter at most equal to the internal diameter of the tube. This punch 18 can thus easily be introduced into the end of a tube which must be deformed, for example at the left end of the tubes shown in FIG. 1.
  • the lateral faces 24 and 26 then act as organs guiding and centering.
  • a compression part 38 also comprising a groove 40, is then lowered on the tube 1, then clamped on this tube which it presses into the groove 34 until it itself comes to bear against the matrix 36.
  • the bottom of the groove 40 pushes the upper part of the tube 1 against the curved surface 32 of the punch 18, then pushes this punch itself into the groove 34 by deforming the lower part of the tube 1 , which is applied against the two flat faces 20 and 22 of the punch 18.
  • the groove 40 closes the groove 34 and delimits with it a cavity whose cross section has substantially the shape of a triangle.
  • the groove 40 has a curved shape, its radius of curvature being very close to that of the upper cylindrical surface 32 of the punch, so that the tube 1 deformed by compression takes, as shown Figure 5, also a cross section in the shape of a triangle having a curved side.
  • the tube 1 practically follows the shape of the cavity delimited by the grooves 40 and 34 and, moreover, is supported on the punch 18.
  • the punch 18 is connected, by a transition portion 41, to a handling handle 42.
  • the active part of the forming tool or punch 18 can be relatively short, as shown in Figure 6, or have a length significantly greater and thus allow the deformation of a part of the tube relatively distant from its open end.
  • a punch 18 of great length can be introduced into a tube 44, of circular section, and reach a middle portion 46.
  • the portion of tube 46 containing the punch 18 is then placed in the die 36 and compressed by the part 38, as described for the tube 1.
  • the axial length of these two members that is to say of the die and of the compression part 38, as well as that of the grooves 34 and 40 which are open at their two ends, correspond to the length of the portion of tube which it is desired to deform. Consequently, in the embodiment of FIG. 7, the length of the grooves 34 and 40 used corresponds to the length of the tube portion 46. Thus only this part is deformed, the rest of the tube 44 retaining its circular section.
  • the angle of the dihedral formed by the flat faces 20 and 22 of the portion 46 can vary and be chosen as a function of the particular application for which the tube 44 is intended.
  • a punch 18 is then introduced into each of the tubes 1, 2, 3 for example, then these tubes are pressed against each other by compression piles in the portion of a cylinder which bring them together so that they deform at their reciprocal contact. Each abuts in the V-shaped groove that the two adjacent tubes gradually form by matching the shape of the punches they contain.

Abstract

Le poinçon de formage (18) comporte deux faces planes (20, 22) reliées par une arête (23), deux portions d'un cylindre passant par l'arête (23) et une surface incurvée centrée sur l'arête. Ce poinçon (18) est introduit dans le tube jusqu'au point à déformer, puis le tube est comprimé entre une rainure (34) en V d'une matrice (36) et une rainure incurvée (40) d'une pièce de compression (38). Le poinçon (18) est ensuite extrait du tube par coulissement axial.The forming punch (18) has two planar faces (20, 22) connected by an edge (23), two portions of a cylinder passing through the edge (23) and a curved surface centered on the edge. This punch (18) is introduced into the tube up to the point to be deformed, then the tube is compressed between a V-shaped groove (34) of a die (36) and a curved groove (40) of a compression part. (38). The punch (18) is then extracted from the tube by axial sliding.

Description

Les tubes utilisés dans l'industrie ont généralement une section circulaire en raison de la facilité de leur fabrication en continu, à partir de rouleaux de feuillards, sur machine à tube et également en raison de leurs qualités mécaniques. Toutefois cette forme circulaire pose des problèmes lorsque l'on veut effectuer certaines opérations telles que le perçage d'un tube, son soudage avec d'autres pièces, son accostage avec d'autres tubes, et notamment l'assemblage de plusieurs tubes semblables de façon à leur permettre de déboucher dans un autre tube de plus forte section.Tubes used in industry generally have a circular section because of the ease of their continuous production, from strip rolls, on a tube machine and also because of their mechanical qualities. However, this circular shape poses problems when one wants to perform certain operations such as drilling a tube, welding it with other parts, docking it with other tubes, and in particular assembling several similar tubes of so as to allow them to lead into another tube of larger section.

La présente invention a pour but de remédier à ces inconvénients en permettant de former sur le tube des surfaces planes locales.The object of the present invention is to remedy these drawbacks by making it possible to form local flat surfaces on the tube.

Cette invention a en effet pour objet un procédé de déformation locale d'un tube rond en un tube de section sensiblement triangulaire, selon lequel on introduit axialement dans le tube un poinçon allongé comportant un dièdre entre deux faces de guidage, à poser la portion de tube à déformer,contenant le poinçon, sur les parois latérales d'une rainure en V de la face supérieure d'une matrice, puis à appliquer sur la surface libre extérieure du tube une pièce de compression, également munie d'une rainure, et à la serrer jusqu'à son contact avec la matrice et à la pénétration du tube et du poinçon dans le fond de la rainure en V, de sorte que la portion de tube épouse le contour de l'espace délimité entre les rainures de la matrice et de la pièce de compression, dont la section est sensiblement triangulaire; enfin on écarte la pièce de compression et la matrice et on retire le poinçon du tube.The subject of this invention is in fact a method of locally deforming a round tube into a tube of substantially triangular cross section, according to which an elongated punch comprising a dihedral between two guide faces is inserted axially into the tube, to lay the portion of tube to be deformed, containing the punch, on the side walls of a V-shaped groove on the upper face of a die, then to be applied to the external free surface of the tube a compression part, also provided with a groove, and tightening it until it comes into contact with the die and the penetration of the tube and the punch into the bottom of the V-groove, so that the portion of tube follows the outline of the space delimited between the grooves of the matrix and of the compression part, the section of which is substantially triangular; finally we move aside the compression part and the matrix and we withdraw the punch from the tube.

Le tube ainsi réalisé présente, sur une portion de sa longueur seulement, une section sensiblement triangulaire, mais seule sa forme a été modifiée de sorte que ses qualités mécaniques n'ont pas été altérées mais que par contre son adaptation à être fixé ou accosté à d'autres pièces est nettement améliorée.The tube thus produced has, over a portion of its length only, a substantially triangular section, but only its shape has been modified so that its mechanical qualities have not been altered but that on the other hand its adaptation to be fixed or accosted to other parts is clearly improved.

L'invention s'étend également à un outil ou poinçon de formage, destiné à la mise en oeuvre de ce procédé, qui comporte un dièdre d'angle déterminé entre deux faces étroites de guidage et de centrage, les arêtes du dièdre et des extrémités des deux faces latérales étant des génératrices d'un même cylindre.The invention also extends to a forming tool or punch, intended for the implementation of this method, which comprises a dihedron with a determined angle between two narrow guide and centering faces, the edges of the dihedron and of the ends of the two lateral faces being generators of the same cylinder.

Selon un mode de réalisation préféré, l'outil comporte à l'opposé de l'arête du dièdre, une surface incurvée dont l'axe est confondu avec cette arête.According to a preferred embodiment, the tool comprises, opposite the edge of the dihedron, a curved surface whose axis coincides with this edge.

Le cylindre sur lequel sont placées les arêtes de l'outil ayant un diamètre très légèrement inférieur à celui du tube à déformer, l'outil peut facilement être introduit à l'intérieur de ce tube jusqu'au point désiré, et même retiré de ce tube après sa déformation. Il est par ailleurs toujours parfaitement centré dans le tube et peut l'être aisément par rapport à la matrice.The cylinder on which the edges of the tool are placed having a diameter very slightly smaller than that of the tube to be deformed, the tool can easily be inserted inside this tube to the desired point, and even removed from it. tube after its deformation. It is also always perfectly centered in the tube and can easily be centered in relation to the matrix.

La description ci-dessous fera d'ailleurs ressortir les avantages et caractéristiques de l'invention.The description below will moreover highlight the advantages and characteristics of the invention.

Sur les dessins annexés :

  • - la fig.l est une vue en perspective montrant l'accostage de plusieurs tubes déformés selon le procédé de l'invention; 1'
  • - la fig. 2 est une vue en bout, à échelle légèrement agrandie, des tubes de la figure 1;
  • - la fig. 3 est une vue analogue à la figure 2, d'une autre application de l'invention;
  • - les fig. 4 et 5 illustrent deux phases du procédé de déformation du tube, respectivement avant et après la compression de ce dernier;
  • - la fig. 6 est une vue en perspective d'un poinçon de formage selon l'invention;
  • - la fig. 7 est une vue en perspective d'un autre exemple de réalisation d'un tube déformé localement par le procédé de l'invention.
In the accompanying drawings:
  • - Fig.l is a perspective view showing the docking of several deformed tubes according to the method of the invention; 1 '
  • - fig. 2 is an end view, on a slightly enlarged scale, of the tubes of FIG. 1;
  • - fig. 3 is a view similar to FIG. 2 of another application of the invention;
  • - figs. 4 and 5 illustrate two phases of the tube deformation process, respectively before and after the compression of the latter;
  • - fig. 6 is a perspective view of a forming punch according to the invention;
  • - fig. 7 is a perspective view of another embodiment of a locally deformed tube by the method of the invention.

Les figures 1 et 2 illustrent une application particulièrement intéressante de l'invention. Elles montrent en effet trois tubes de section circulaire, 1, 2 et 3, qui sont disposés parallèlement côte à côte dans le prolongement d'un tube 4 de plus grand diamètre. Chacun des tubes 1, 2 et 3 est déformé à son extrémité voisine du tube 4 de façon à comporter deux faces planes, respectivement 6,7, 8,9, et 10,11, susceptible d'être accostée chacune contre la face correspondante de l'un des deux autres tubes. Les deux faces planes 6,7 sont réunies par une surface incurvée en portion de cercle 12, dont le diamètre est supérieur à celui du tube 1, 2 ou 3 initial, chacune des surfaces 12 formant un tiers de cercle, de sorte que l'ensemble des trois tubes déformés 1, 2 et 3 est délimité extérieurement par une circonférence constituée par la succession des trois surfaces 12, ainsi que le montre plus clairement la figure 2.Figures 1 and 2 illustrate a particularly interesting application of the invention. They indeed show three tubes of circular section, 1, 2 and 3, which are arranged parallel side by side in the extension of a tube 4 of larger diameter. Each of the tubes 1, 2 and 3 is deformed at its end close to the tube 4 so as to have two flat faces, respectively 6.7, 8.9, and 10.11, capable of being approached each against the corresponding face of one of the other two tubes. The two flat faces 6, 7 are joined by a curved surface in a portion of a circle 12, the diameter of which is greater than that of the initial tube 1, 2 or 3, each of the surfaces 12 forming a third of a circle, so that the the set of three deformed tubes 1, 2 and 3 is delimited externally by a circumference constituted by the succession of the three surfaces 12, as shown more clearly in FIG. 2.

Le diamètre extérieur de l'ensemble des trois tubes déformés est égal, ou de préférence légèrement inférieur, au diamètre interne du tube 4, de sorte que les trois tubes 1, 2 et 3 peuvent facilement être raccordés à ce tube 4 et déboucher à l'intérieur.The outside diameter of the assembly of the three deformed tubes is equal to, or preferably slightly less than, the internal diameter of the tube 4, so that the three tubes 1, 2 and 3 can easily be connected to this tube 4 and lead to the inside.

Bien entendu un raccordement peut s'effectuer de manière analogue lorsque les tubes de section circulaire sont en nombre supérieur à trois, par exemple au nombre de quatre, comme le montre la figure 3. Dans ce cas seulement l'angle que forment entre elles les faces planes 13 et 14, ainsi que la valeur de l'arc de la surface incurvée correspondante 16, sont de 90° au lieu de 120°.Of course, a connection can be made in a similar manner when the tubes of circular section are more than three in number, for example four in number, as shown in FIG. 3. In this case only the angle formed between them plane faces 13 and 14, as well as the value of the arc of the corresponding curved surface 16, are 90 ° instead of 120 °.

Quelle que soit la valeur de l'angle du dièdre que doivent former les faces planes du tube de section circulaire, la déformation est obtenue au moyen d'un outil de formage, ou poinçon, tel que celui représenté sur la figure 6. Ce poinçon 18 est formé à partir d'une barre de métal pleine, de section circulaire ayant un rayon voisin ou très légèrement inférieur au rayon interne du tube à déformer, par exemple le tube 1 de la figure 4. Ce poinçon 18 comporte deux faces planes, respectivement 20 et 22, se coupant sur une arête 23 et formant ainsi un dièdre dont l'angle correspond à celui que l'on veut obtenir sur le tube 1. Chacune des faces planes 20 et 22 rejoint une portion de cylindre 24, 26 respectivement, de la barre initiale et l'arête 23 du dièdre formé par les faces 20 et 22 se trouve pratiquement sur une génératrice du cylindre de la surface extérieure de cette barre. Par suite, les arêtes 27, 28 et 29, 30 des faces latérales 24 et 26, et l'arête 23 du dièdre constituent les génératrices d'un même cylindre.Whatever the value of the dihedral angle that the plane faces of the section tube must form circular, the deformation is obtained by means of a forming tool, or punch, such as that shown in FIG. 6. This punch 18 is formed from a solid metal bar, of circular section having a neighboring radius or very slightly less than the internal radius of the tube to be deformed, for example the tube 1 in FIG. 4. This punch 18 has two flat faces, respectively 20 and 22, intersecting on an edge 23 and thus forming a dihedron whose angle corresponds to that which one wishes to obtain on the tube 1. Each of the planar faces 20 and 22 joins a portion of cylinder 24, 26 respectively, of the initial bar and the edge 23 of the dihedron formed by the faces 20 and 22 is located practically on a generator of the cylinder of the outer surface of this bar. Consequently, the edges 27, 28 and 29, 30 of the lateral faces 24 and 26, and the edge 23 of the dihedral constitute the generatrices of the same cylinder.

Par ailleurs, en regard du sommet 23 du dièdre, les faces latérales 24 et 26 sont reliées par une surface 32, également incurvée, mais ayant son axe confondu avec l'arête 23.Furthermore, opposite the apex 23 of the dihedral, the lateral faces 24 and 26 are connected by a surface 32, also curved, but having its axis coincident with the edge 23.

Le poinçon 18 peut recevoir toute longueur désirée mais sa section transversale reste inscrite dans un cercle de diamètre au plus égal au diamètre interne du tube. Ce poinçon 18 peut ainsi facilement être introduit dans l'extrémité d'un tube qui doit être déformée, par exemple à l'extrémité de gauche des tubes représentés sur la figure 1. Les faces latérales 24 et 26 jouent alors le rôle d'organes de guidage et de centrage.The punch 18 can receive any desired length but its cross section remains inscribed in a circle of diameter at most equal to the internal diameter of the tube. This punch 18 can thus easily be introduced into the end of a tube which must be deformed, for example at the left end of the tubes shown in FIG. 1. The lateral faces 24 and 26 then act as organs guiding and centering.

La portion de tube contenant le poinçon 18 est ensuite placée dans une rainure en V, 34, ménagée à la partie supérieure d'une matrice 36, le dièdre 20, 22, 23 du poinçon étant exactement centré par rapport à la rainure 34, tandis que le tube 1 est en appui tangentiel sur les deux parois inclinées de la rainure mais fait saillie à l'extérieur de celle-ci (fig. 4).The portion of tube containing the punch 18 is then placed in a V-shaped groove 34 formed in the upper part of a die 36, the dihedron 20, 22, 23 of the punch being exactly centered relative to the groove 34, while that the tube 1 is in tangential support on the two inclined walls of the groove but protrudes outside of it (fig. 4).

Une pièce de compression 38, comportant également une rainure 40, est alors abaissée sur le tube 1, puis serrée sur ce tube qu'elle enfonce dans la rainure 34 jusqu'à ce qu'elle-même vienne en appui contre la matrice 36. Au cours de ce déplacement de la pièce 38 le fond de la rainure 40 repousse la partie supérieure du tube 1 contre la surface incurvée 32 du poinçon 18, puis repousse ce poinçon lui-même dans la rainure 34 en déformant la partie inférieure du tube 1, qui vient s'appliquer contre les deux faces planes 20 et 22 du poinçon 18.A compression part 38, also comprising a groove 40, is then lowered on the tube 1, then clamped on this tube which it presses into the groove 34 until it itself comes to bear against the matrix 36. During this movement of the part 38 the bottom of the groove 40 pushes the upper part of the tube 1 against the curved surface 32 of the punch 18, then pushes this punch itself into the groove 34 by deforming the lower part of the tube 1 , which is applied against the two flat faces 20 and 22 of the punch 18.

Lorsque la pièce 38 arrive en contact avec la matrice 36 la rainure 40 ferme la rainure 34 et délimite avec elle une cavité dont la section droite a sensiblement la forme d'un triangle. De préférence, comme le montrent les dessins, la rainure 40 a une forme incurvée, son rayon de courbure étant très voisin de celui de la surface cylindrique supérieure 32 du poinçon, de sorte que le tube 1 déformé par la compression prend, comme le montre la figure 5, également une section droite en forme de triangle ayant un côté incurvé. A ce moment en effet, le tube 1 épouse pratiquement la forme de la cavité délimitée par les rainures 40 et 34 et, en outre, est en appui sur le poinçon 18.When the part 38 comes into contact with the matrix 36 the groove 40 closes the groove 34 and delimits with it a cavity whose cross section has substantially the shape of a triangle. Preferably, as shown in the drawings, the groove 40 has a curved shape, its radius of curvature being very close to that of the upper cylindrical surface 32 of the punch, so that the tube 1 deformed by compression takes, as shown Figure 5, also a cross section in the shape of a triangle having a curved side. At this time, in fact, the tube 1 practically follows the shape of the cavity delimited by the grooves 40 and 34 and, moreover, is supported on the punch 18.

Toutefois, comme le montre notamment la figure 5, les faces latérales 24 et 26 en fin de compression sont libres, de sorte que le poinçon 18 peut coulisser à l'intérieur du tube 1, même après la déformation de celui- ci. En conséquence, après l'éloignement de la pièce de compression 38 et de la matrice 36, le poinçon 18 est retiré du tube 1 qui est prêt à être utilisé, c'est-à-dire éventuellement à être assemblé avec d'autres tubes identiques, de la manière représentée sur les figures 1 à 3.However, as shown in particular in Figure 5, the side faces 24 and 26 at the end of compression are free, so that the punch 18 can slide inside the tube 1, even after the deformation thereof. Consequently, after the compression piece 38 and the die 36 have moved away, the punch 18 is withdrawn from the tube 1 which is ready to be used, that is to say possibly to be assembled with other tubes identical, as shown in the figures 1 to 3.

De préférence, comme le montre la figure 6, le poinçon 18 est relié, par une portion de transition 41, à une poignée de manipulation 42. La partie active de l'outil de formage ou poinçon 18 peut être relativement courte, comme représenté sur la figure 6, ou avoir une longueur très nettement supérieure et permettre ainsi la déformation d'une partie du tube relativement éloignée de son extrémité ouverte.Preferably, as shown in FIG. 6, the punch 18 is connected, by a transition portion 41, to a handling handle 42. The active part of the forming tool or punch 18 can be relatively short, as shown in Figure 6, or have a length significantly greater and thus allow the deformation of a part of the tube relatively distant from its open end.

Par exemple, comme dans le mode de réalisation représenté sur la figure 7, un poinçon 18 de grande longueur peut être introduit dans un tube 44, de section circulaire, et atteindre une partie médiane 46. La portion de tube 46 contenant le poinçon 18 est ensuite placée dans la matrice 36 et comprimée par la pièce 38, de la manière décrite pour le tube 1. Dans ce cas, comme dans le précédent, la longueur axiale de ces deux organes, c'est-à-dire de la matrice et de la pièce de compression 38, de même que celle des rainures 34 et 40 qui sont ouvertes à leurs deux extrémités, correspondent à la longueur de la portion de tube que l'on désire déformer. Par conséquent, dans le mode de réalisation de la figure 7, la longueur des rainures 34 et 40 utiliséescorrespond à la longueur de la portion de tube 46. Ainsi seule cette partie est déformée, le reste du tube 44 conservant sa section circulaire.For example, as in the embodiment shown in FIG. 7, a punch 18 of great length can be introduced into a tube 44, of circular section, and reach a middle portion 46. The portion of tube 46 containing the punch 18 is then placed in the die 36 and compressed by the part 38, as described for the tube 1. In this case, as in the previous one, the axial length of these two members, that is to say of the die and of the compression part 38, as well as that of the grooves 34 and 40 which are open at their two ends, correspond to the length of the portion of tube which it is desired to deform. Consequently, in the embodiment of FIG. 7, the length of the grooves 34 and 40 used corresponds to the length of the tube portion 46. Thus only this part is deformed, the rest of the tube 44 retaining its circular section.

Bien entendu l'angle du dièdre formé par les faces planes 20 et 22 de la portion 46 peut varier et être choisi en fonction de l'application particulière à laquelle est destiné le tube 44.Of course, the angle of the dihedral formed by the flat faces 20 and 22 of the portion 46 can vary and be chosen as a function of the particular application for which the tube 44 is intended.

Dans tous les cas seule la forme de la section du tube est modifiée. Le matériau lui-même conserve ses propriétés propres, de sorte que la déformation n'entraîne pas d'affaiblissement de la résistance mécanique du tube mais permet, au contraire, sa fixation et son assemblage aisés avec d'autres tubes ou avec des pièces planes ou autres.In all cases, only the shape of the tube section is modified. The material itself retains its own properties, so that the deformation does not weaken the mechanical strength of the tube but allows, on the contrary, its easy fixing and assembly with other tubes or with flat or other parts.

Lorsque plusieurs tubes sont destinés à être accostés de la manière représentée aux Fig. 1 à 3, il est souvent avantageux de les déformer simultanément. Un poinçon 18 est alors introduit dans chacun des tubes 1,2,3 par exemple, puis ces tubes sont pressés les uns contre les autres par des piles de compression en portion de cylindre qui les rapprochent de telle sorte qu'ils se déforment à leur contact réciproque. Chacun bute dans la rainure en V que forment progressivement les deux tubes adjacents en épousant la forme des poinçons qu'ils contiennent.When several tubes are intended to be docked in the manner shown in FIGS. 1 to 3, it is often advantageous to deform them simultaneously. A punch 18 is then introduced into each of the tubes 1, 2, 3 for example, then these tubes are pressed against each other by compression piles in the portion of a cylinder which bring them together so that they deform at their reciprocal contact. Each abuts in the V-shaped groove that the two adjacent tubes gradually form by matching the shape of the punches they contain.

Aucune déformation anormale n'apparaît, car la pression est répartie également sur tous les tubes et les poinçons sont serrés jusqu'à entrer pratiquement en contact entre eux. Par contre le retrait des poinçons reste facile.No abnormal deformation appears, because the pressure is distributed evenly over all the tubes and the punches are tightened until practically coming into contact with each other. On the other hand the removal of the punches remains easy.

Il est donc possible de déformer ainsi simultanément des tubes déjà installés, au moment de leur assemblage, par exemple sur un autre tube de plus grand diamètre, ce qui facilite considérablement les assemblages de ce type.It is therefore possible to thus simultaneously deform tubes already installed, at the time of their assembly, for example on another tube of larger diameter, which considerably facilitates assemblies of this type.

Claims (13)

1. Procédé de déformation locale d'un tube rond en un tube de section sensiblement circulaire comportant deux faces planes, caracté-risé en ce qu'il consiste à introduire axialement dans le tube un poinçon allongé (18) comportant un dièdre (20, 22) entre deux faces latérales de guidage (24, 26), à poser la portion du tube à déformer,contenant le poinçon, sur les parois latérales inclinées d'une rainure en V (34) d'une matrice (36), puis à appliquer sur la surface libre extérieure du tube (1) une pièce de compression (38),également munie d'une rainure, et à la serrer jusqu'à son contact avec la matrice et à la pénétration du tube et du poinçon dans le fond de la cavité en V, de sorte que le tube épouse le contour de la cavité délimitée par les rainures de la matrice et de la pièce de compression, et a une section triangulaire; à écarter ensuite la pièce de compression et la matrice, puis à retirer le poinçon du tube.1. A method of locally deforming a round tube into a tube of substantially circular cross section comprising two flat faces, characterized in that it consists in axially introducing into the tube an elongated punch (18) comprising a dihedral (20, 22) between two lateral guide faces (24, 26), to lay the portion of the tube to be deformed, containing the punch, on the inclined side walls of a V-groove (34) of a matrix (36), then applying on the external free surface of the tube (1) a compression part (38), also provided with a groove, and tightening it until it comes into contact with the die and the penetration of the tube and the punch into the bottom of the V-shaped cavity, so that the tube follows the contour of the cavity delimited by the grooves of the matrix and of the compression part, and has a triangular section; then move aside the compression part and the die, then remove the punch from the tube. 2 - Procédé suivant la revendication 1, caractérisé en ce que l'on presse le tube contenant le poinçon au moyen d'une pièce de compression dont la rainure est incurvée, avec un rayon de courbure voisin de celui de la surface supérieure du poinçon, et un axe qui en fin de compression est sensiblement confondu avec le fond de la rainure en V (34) de la matrice.2 - Method according to claim 1, characterized in that the tube containing the punch is pressed by means of a compression part whose groove is curved, with a radius of curvature close to that of the upper surface of the punch, and an axis which at the end of compression is substantially coincident with the bottom of the V-shaped groove (34) of the matrix. 3 - Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que les rainures (34, 40) de la matrice et de la pièce de compression ont une largeur supérieure au diamètre du tube (1) à déformer.3 - Method according to one of claims 1 and 2, characterized in that the grooves (34, 40) of the matrix and the compression part have a width greater than the diameter of the tube (1) to be deformed. 4 - Procédé suivant l'une des revendications 1 à 3, caractérisé en ce que la dimension axiale de la matrice et de la pièce de compression (36, 38) correspond à la longueur des faces planes désirées du tube.4 - Method according to one of claims 1 to 3, characterized in that the axial dimension of the matrix and the compression part (36, 38) corresponds to the length of the desired planar faces of the tube. 5 - Procédé suivant l'une des revendications 1 à 4, caractérisé en ce que l'on introduit le poinçon (18) dans l'extrémité du tube (1, 2, 3) à déformer, puis on place cette extrémité entre la matrice et la pièce de compression.5 - Method according to one of claims 1 to 4, characterized in that the punch (18) is introduced into the end of the tube (1, 2, 3) to be deformed, then this end is placed between the matrix and the compression part. 6 - Procédé suivant l'une des revendications 1 à 4, caractérisé en ce que l'on introduit un poinçon (18) de longueur relativement importante jusqu'à un point intermédiaire du tube, et on pose cette partie intermédiaire (46) dans la rainure en V (34) de la matrice.6 - Method according to one of claims 1 to 4, characterized in that one introduces a punch (18) of relatively large length to an intermediate point of the tube, and this intermediate part (46) is placed in the V-shaped groove (34) of the matrix. 7 - Poinçon de formage pour la déformation locale d'un tube de section circulaire, caractérisé en ce qu'il comporte un dièdre (20, 22, 23), d'angle déterminé, entre deux faces (24, 26) étroites de guidage et de centrage, l'arête (23) du dièdre et les arêtes (27,28-29,30) d'extrémité des deux faces latérales étant des génératrices d'un même cylindre.7 - Forming punch for the local deformation of a tube of circular section, characterized in that it comprises a dihedral (20, 22, 23), of determined angle, between two narrow guide faces (24, 26) and centering, the edge (23) of the dihedral and the edges (27,28-29,30) of the end of the two lateral faces being generators of the same cylinder. 8 - Poinçon suivant la revendication 7, caractérisé en ce qu'il comporte à l'opposé de l'arête de sommet du dièdre (23) une surface incurvée (32) dont l'axe est confondu avec cette arête.8 - Punch according to claim 7, characterized in that it opposite to the top edge of the dihedral (23) a curved surface (32) whose axis coincides with this edge. 9 - Poinçon suivant l'une des revendications 7 et 8, caractérisé en ce que les faces latérales de guidage et de centrage sont constituées par des portions d'un cylindre de diamètre légèrement inférieur à celui du tube à déformer, dans lequel le poinçon est découpé.9 - Punch according to one of Claims 7 and 8, characterized in that the lateral guide and centering faces are constituted by portions of a cylinder with a diameter slightly smaller than that of the tube to be deformed, in which the punch is cut out. 10 - Poinçon suivant l'une des revendications 7 à 9, caractérisé en ce que l'angle du dièdre est au plus égal à 120°.10 - Punch according to one of claims 7 to 9, characterized in that the angle of the dihedral is at most equal to 120 °. 11 - Tube de section circulaire, caractérisé en ce qu'il comporte sur une partie de sa longueur deux faces planes et une section sensiblement triangulaire.11 - Tube of circular section, characterized in that over a part of its length two flat faces and a substantially triangular section. 12 - Tube suivant la revendication 11, caractérisé en ce que la partie de section triangulaire est située à l'une de ses extrémités.12 - Tube according to claim 11, characterized in that the triangular section part is located at one of its ends. 13 - Tube suivant la revendication 11, caractérisé en ce que la partie (46) de section triangulaire est située en un point intermédiaire de sa longueur.13 - Tube according to claim 11, characterized in that the part (46) of triangular section is located at an intermediate point of its length.
EP82401761A 1981-10-09 1982-09-28 Method for the local deforming of round tubes into tubes with flat sides, and die for doing the same Expired EP0077700B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8119036A FR2514270A1 (en) 1981-10-09 1981-10-09 METHOD FOR LOCAL DEFORMATION OF A ROUND TUBE INTO A TUBE COMPRISING PLANAR FACES, AND FORMING PUNCHER FOR IMPLEMENTING SAME
FR8119036 1981-10-09

Publications (2)

Publication Number Publication Date
EP0077700A1 true EP0077700A1 (en) 1983-04-27
EP0077700B1 EP0077700B1 (en) 1985-05-29

Family

ID=9262891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401761A Expired EP0077700B1 (en) 1981-10-09 1982-09-28 Method for the local deforming of round tubes into tubes with flat sides, and die for doing the same

Country Status (6)

Country Link
US (1) US4513601A (en)
EP (1) EP0077700B1 (en)
JP (1) JPS5870917A (en)
DE (1) DE3263910D1 (en)
ES (1) ES8402184A1 (en)
FR (1) FR2514270A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467170A2 (en) * 2003-04-10 2004-10-13 Behr GmbH & Co. KG Fitting for heat exchanger , more particularly for automotive vehicle

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569256A (en) * 1984-09-11 1986-02-11 Edward Pepper Method of making a seamless punch
JPH08155575A (en) * 1994-11-30 1996-06-18 Showa:Kk Manufacture of rack shaft
DE19717822C2 (en) * 1997-04-26 2001-02-08 Gretsch Unitas Gmbh Method for manufacturing a telescopic tube of a telescopic brake
US5855137A (en) * 1997-10-01 1999-01-05 General Motors Corporation Method of manufacturing a reservoir tube
US6659134B2 (en) * 2001-03-16 2003-12-09 John Navis Peritoneal dialysis catheter
US6889713B2 (en) * 2001-03-16 2005-05-10 John A. Navis Peritoneal dialysis catheter
BE1014254A3 (en) * 2001-06-20 2003-07-01 Sonaca Sa TUBULAR STRUCTURE THIN partitioned AND MANUFACTURING METHOD THEREOF.
US6918839B2 (en) * 2002-01-28 2005-07-19 The Boeing Company Damage tolerant shaft
US20040250404A1 (en) * 2003-01-14 2004-12-16 Cripsey Timothy J. Process for press forming metal tubes
KR20060034639A (en) * 2003-05-08 2006-04-24 프로토튜브, 아이엔씨. Process for press forming metal tubes
US20060096099A1 (en) * 2003-05-08 2006-05-11 Noble Metal Processing, Inc. Automotive crush tip and method of manufacturing
KR100643141B1 (en) * 2005-09-23 2006-11-10 우신공업 주식회사 Apparatus for forming collecting parts of the pipe type manifold
JP4687890B2 (en) * 2005-10-28 2011-05-25 トヨタ自動車株式会社 Straightening method of metal bending pipe and straightening press mold
JP4622962B2 (en) * 2005-11-30 2011-02-02 株式会社デンソー Intercooler inlet / outlet piping structure
US20130305689A1 (en) * 2012-05-18 2013-11-21 Louis A. Belanger Method and device for exhaust gas management
CN106482568B (en) * 2015-08-25 2019-03-12 丹佛斯微通道换热器（嘉兴）有限公司 Heat exchanger tube, heat exchanger and its assembly method for heat exchanger
US10782071B2 (en) * 2017-03-28 2020-09-22 General Electric Company Tubular array heat exchanger
CN111299422B (en) * 2020-02-27 2021-09-17 武汉理工大学 Molding die for air inlet of fan and manufacturing and forming method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69305C (en) * L. SlLVER-MAN in Bexley, Grafschaft Kent, Bellevue, Knoll Road, England Process for the production of tubes provided with longitudinal ribs
DE3835C (en) * 5. FOX, Maschinenbauer, in Leetls Forge, Leeds, England Steam boiler tubes with shafts along with machines and devices used to manufacture the same
GB575921A (en) * 1944-08-28 1946-03-11 Clarence Lennon Dewey Machine and method for indenting tubing
US3384946A (en) * 1965-04-27 1968-05-28 Reynolds Metals Co Method of making integrally finned metal tubing

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1983584A (en) * 1930-03-29 1934-12-11 Urschel Engineering Company Process of shaping metal tubes
US2205893A (en) * 1937-09-03 1940-06-25 Gen Electric Method of corrugating a heatradiating tube
US3476869A (en) * 1967-11-21 1969-11-04 Benjamin K Hawkins Conduit system
US3719985A (en) * 1971-08-13 1973-03-13 Steel Parts Corp Method of making bushings
FR2417709A1 (en) * 1978-02-21 1979-09-14 Coflexip FLEXIBLE COMPOSITE TUBE
US4296343A (en) * 1979-10-05 1981-10-20 Ambac Industries, Incorporated Electric motor housing, or the like, with integral pole and methods for making same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69305C (en) * L. SlLVER-MAN in Bexley, Grafschaft Kent, Bellevue, Knoll Road, England Process for the production of tubes provided with longitudinal ribs
DE3835C (en) * 5. FOX, Maschinenbauer, in Leetls Forge, Leeds, England Steam boiler tubes with shafts along with machines and devices used to manufacture the same
GB575921A (en) * 1944-08-28 1946-03-11 Clarence Lennon Dewey Machine and method for indenting tubing
US3384946A (en) * 1965-04-27 1968-05-28 Reynolds Metals Co Method of making integrally finned metal tubing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467170A2 (en) * 2003-04-10 2004-10-13 Behr GmbH & Co. KG Fitting for heat exchanger , more particularly for automotive vehicle
EP1467170A3 (en) * 2003-04-10 2013-01-23 Behr GmbH & Co. KG Fitting for heat exchanger , more particularly for automotive vehicle

Also Published As

Publication number Publication date
DE3263910D1 (en) 1985-07-04
ES515961A0 (en) 1984-02-16
ES8402184A1 (en) 1984-02-16
EP0077700B1 (en) 1985-05-29
FR2514270A1 (en) 1983-04-15
FR2514270B1 (en) 1985-04-26
US4513601A (en) 1985-04-30
JPS5870917A (en) 1983-04-27

Similar Documents

Publication Publication Date Title
EP0077700B1 (en) Method for the local deforming of round tubes into tubes with flat sides, and die for doing the same
EP1941167B1 (en) Blind rivet and removal method thereof
EP1171272B1 (en) Forming equipment for polymerisation of shaped parts in composite material
EP0949977B1 (en) Method for the crosswise shrinking of a cylindrical part in a tubular part and assembly of two corresponding parts
FR2562727A1 (en) METHOD FOR MANUFACTURING CONTACT SPRING SOCKETS
EP1089411B1 (en) Device intended to be pierced by a cylindrical object in a sealed condition, box for electrical apparatus and a process using these
EP0029380B1 (en) Method of forming a bead in the wall of a metallic tube
EP0040163A1 (en) Method for manufacturing end commutators in electric motors
EP0403434B1 (en) Method for preparing as well as fixing and installation for fixing printing plates on a cylinder of a gravure printing machine
EP2833006B1 (en) Screw with limited torque
EP1680257B1 (en) Handling device for a helical spring, handling installation for such a spring and method for handling such a spring
CA2236542A1 (en) Device for assembling a clamping jaw
EP0095976B1 (en) Welding process for two elements
EP0106751A1 (en) Method of making cylindrical work pieces of progressively increasing diameters, and device for carrying out the method
EP0030492B1 (en) Process and device for aligning two cylindrical sections to be assembled abuttingly
EP0433203B1 (en) Method and apparatus for drawing conical containers and containers so obtained
LU82595A1 (en) METHOD AND APPARATUS FOR DETACHING A STRIP FROM A COILED METAL SHEET
FR2653502A1 (en) TUBULAR REINFORCING ELEMENT AND METHOD FOR MANUFACTURING THE SAME
FR3101826A1 (en) PART FOR FIXING SYSTEM AND FIXING SYSTEM INCLUDING THIS PART
FR3116455A1 (en) Tube cutting device
EP0803301A1 (en) Method of manufacturing an article by superplastic forming and diffusion bonding
EP0461017B1 (en) Process and apparatus for making a container and container obtained by said process
EP1160027A1 (en) Expansion plier
FR2612703A1 (en) Method of making an alternator stator and alternator thus obtained
BE572323A (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT NL SE

17P Request for examination filed

Effective date: 19830330

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE GB IT NL SE

REF Corresponds to:

Ref document number: 3263910

Country of ref document: DE

Date of ref document: 19850704

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19850930

Year of fee payment: 4

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19860929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19860930

BERE Be: lapsed

Owner name: CYCLES PEUGEOT

Effective date: 19860930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19870401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19870602

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881121

EUG Se: european patent has lapsed

Ref document number: 82401761.0

Effective date: 19870812