CH355331A

CH355331A - Process for the manufacture of a tubular connector and connector obtained according to this process

Info

Publication number: CH355331A
Authority: CH
Inventors: Gabriel Hyver Rene
Original assignee: Aurousseau & Cie Ets
Priority date: 1958-06-03
Filing date: 1959-05-30
Publication date: 1961-06-30

Description

Procede pour la fabrication d'un raccord tubulaire et raccord obtenu selon ce procede La presente Invention a pour objet un procede de fabrication d'un raccord tubulaire bi-m6talhque et 1e raccord tubulaire bi-m & allique obtenu par 1e pro- c6d6. Ce raccord convient par exemple pour r6aliser 1'assemblage d'organes de r6frigerateurs, conden- seurs, appareils de chauffage, etc. ... , lorsque les deux Organes ä assembler sont eux-memas constitu6s par deux m6taux diff6rents, difficiles ä souder entre eux. Process for the manufacture of a tubular connector and connector obtained according to this process The subject of the present invention is a process for the manufacture of a bi-metallic tubular connector and the first bi-metallic tubular connector obtained by the first process. This coupling is suitable, for example, for assembling components of refrigerators, condensers, heaters, etc. ... , when the two Organs to be assembled are themselves made up of two different metals, which are difficult to weld together.

Le procede selon 1'invention est caract6ris6 par 1e fait que Fon soude bout ä bout, par chocs et ä froid, deux morceaux constitues, chacun, d'un des m6taux destines ä constituer 1e raccord et que Fon soumet la pike bi-m6tallique ainsi obtenue ä une op6ration de filage ä froid. The process according to the invention is characterized by the fact that one welds end to end, by impact and cold, two pieces each consisting of one of the metals intended to constitute the first connection and that one subjects the bi-metallic pike thus obtained at a cold spinning operation.

Le raccord selon 1'invention est caracteris6 en ce que la surface de soudure des deux m6taux qui 1e constituent est sensiblement de forme tronconique. The coupling according to the invention is characterized in that the welding surface of the two metals which constitute it is substantially of frustoconical shape.

Quelques mises en Oeuvre particulieres du pro ced6 sont exposees ci-apres, ä titre d'exemple, en regard du dessin ci-annex6, dans lequel Les fig. 1 ä 3 repr6sentent sch6matiquement la soudure des deux morceaux de mAal devant consti- tuer 1e raccord ; les fig. 4 et 5 montrent sch6matiquement la r6a- lisation proprement dite du raccord par filage in verse ; la fig. 6 repr6sente 1e raccord Brut obtenu par cette op6ration ; la fig. 7 represente ce meme raccord apres fini- tion ; la fig. 8 represente un raccord analogue obtenu dune maniere connue ; la fig. 9 repr6sente la r6alisation d'un raccord, analogue ä celui de la fig. 7, par la m6thode de filage direct, et les fig. 10 ä 13 repr6sentent un processus de fa- brication analogue, applique ä des moroeaux de me- tal pr6sentant la forme d'un tube ou d'un dtui. A few particular implementations of the process are set out below, by way of example, with reference to the attached drawing, in which FIGS. 1 to 3 schematically represent the welding of the two pieces of metal to constitute the connection; the figs. 4 and 5 schematically show the actual production of the connection by reverse spinning; fig. 6 represents the Raw fitting obtained by this operation; fig. 7 represents this same fitting after finishing; fig. 8 represents a similar connection obtained in a known manner; fig. 9 represents the realization of a connection, similar to that of FIG. 7, by the direct spinning method, and figs. 10 to 13 show a similar manufacturing process applied to pieces of metal in the shape of a tube or case.

Il sera d6crit tout d'abord, ä titre d'exemple, la fabrication d'un raccord ä partir de deux frägments de Barres 1 et 2, Tune 6tant une Barre de cuivre, 1'autre 6tant une Barre d'aluminium, ces deux m6taux n'6tant cit6s qu'ä titre d'exemple. 0n pourrait em- ployer tous les m6taux susceptibles d'etre travai116s par filage ä froid. . There will first be described, by way of example, the manufacture of a connector from two fragments of bars 1 and 2, one being a copper bar, the other being an aluminum bar, these two metals given only by way of example. One could employ all metals capable of being worked by cold extrusion. .

Chacun de ces fragments 1 et 2 est dispose dans une empreinte tronconique pratiqu6e dans deux blocs d'acier 3, 4 respectivement, que 1'on peut rapprocher brusquement 1'un de 1'autre axialement et qui sont repr6sentes Fig. 2 ä beaucoup plus grande 6chelle. Selon une technique connue, RTI ID="0001.0271" WI="4" HE="4" LX="1636" LY="1778"> ce rapprochement brusque opere la soudure des deux fragments 1 et 2, suivant une zone reprdsentde par la ligne 5 (fig. 2), et laisse apparaitre un bourrelet de soudure 6. Each of these fragments 1 and 2 is arranged in a frustoconical cavity made in two blocks of steel 3, 4 respectively, which can be suddenly brought closer to one another axially and which are represented in FIG. 2 to much larger scale. According to a known technique, RTI ID="0001.0271" WI="4" HE="4" LX="1636" LY="1778"> this abrupt approximation operates the welding of the two fragments 1 and 2, along a zone represented by line 5 (fig. 2), and reveals a weld bead 6.

En s6parant les deux blocs d'acier 3 et 4 1'un de 1'autre, les deux morceaux metalliques soud6s restent dans la cavit6 de 1'un des blocs et, notamment, si les cavit6s tronconiques en question ont des angles au sommet diff6rent, 1e morceau soudd restera tou- jours dans celle dopt 1'angle au sommet est 1e plus petit. Dans 1e cas oü 1'op6ration de soudure ne serait pas rdussie, chaque morceau resterait dans la cavit6 et cette constatation fournit un moyen de v6rifier que la soudure est correcte. By separating the two steel blocks 3 and 4 from each other, the two welded metal pieces remain in the cavity of one of the blocks and, in particular, if the tapered cavities in question have different apex angles , the welded piece will always remain in the one where the vertex angle is the smallest. In the event that the welding operation is not successful, each piece would remain in the cavity and this observation provides a means of verifying that the welding is correct.

Dans une op6ration subsequente, 1e bourrelet (ou bavure) de soudure 6 est cisailld, par exemple en faisant passer 1e morceau soude 1, 2 au travers dune bague 7 d'un diametre convenable, bague qui, dans la fig. 3, est deplac6e dans 1e sens de la fleche F. In a subsequent operation, the bead (or burr) of weld 6 is sheared, for example by passing the welded piece 1, 2 through a ring 7 of a suitable diameter, which ring, in FIG. 3, is moved in the direction of arrow F.

L'ebauche ainsi obtenue est plac6e dans la ca- vit6 8 dune matrice 9, dans laquelle peut descendre 1e poingon 18. Le rayon de ce poingon est ddtermin6, par rapport au rayon de la cavite 8, pour que la difference de ces deux rayons soit precisement dgale ä 1'epaisseur que doit avoir 1e raccord termine. The blank thus obtained is placed in the cavity 8 of a die 9, into which the punch 18 can descend. is exactly equal to the thickness that the finished fitting must have.

Comme 1e montre la fig. 4, la descente du poin- gon dann 1e sens de la fleche F1 provoque, par filage invense, la remontde en 1a du mAal constituant 1'ex- tr6mite 1 de 1'ebauche et, 1'operation se poursuivant, c'est 1e metal constituant la partie 2 de 1'dbauche qui remonte ä son tour. Lorsque cette operation est ter- minee, an obtient un raccord brut, tel que montre fig. 6, dans lequel la zone de soudure des parties 1 et 2, materialisde par la ligne 11, se presente sous la forme dune surface tronconique. De cette maniere, cette zone de soudure a une surface beaucoup plus grande que dans la forme normale de soudure reprd- sentee fig. B. En outre, 1'opdration de filage ayant un effet analogue ä celui d'un forgeage, le raccord selon 1'invention presente les caracteres avantageux 6nu- meres ci-dessus. As shown in fig. 4, the descent of the punch in the direction of the arrow F1 causes, by reverse spinning, the rise in 1a of the maal constituting the end 1 of the blank and, the operation continuing, it is the first metal constituting part 2 of the outline which goes back in turn. When this operation is finished, an obtains a raw fitting, as shown in fig. 6, in which the weld zone of parts 1 and 2, materialized by line 11, is in the form of a frustoconical surface. In this way, this weld zone has a much larger area than in the normal weld shape shown in fig. B. Furthermore, the spinning operation having an effect analogous to that of forging, the joint according to the invention exhibits the advantageous characteristics enumerated above.

Dans une phase subsequente, le fond rdsiduaire 12 de 1'dbauche est enleve dune maniere connue, et 1'on obtient 1e raccord repräsente fig. 7. In a subsequent phase, the residual bottom 12 of the blank is removed in a known manner, and the fitting shown in fig. 7.

L'on peut egalement utiliser la methode de filage directe schematisee dans la fig. 9, dans laquelle la descente du poingon repousse le mdtal ä travers la matrice 13. Ce poinpn prdsente une premiere partie 14, dont 1e rayon est inferieur au rayon de la partie correspondante 15 de la matrice, et une seconde partie 16, de diameire sensiblement egal ä celui de la partie correspondante 17 de ladite matrice, de sorte que 1e metal de la partie 1 de 1'ebauche ne peut pas remonter vers 1e haut et se trouve force vers 1e bas, entre la surface exterieure du poin@on 14 et la surface interne 15 de la matrice. One can also use the direct spinning method schematized in fig. 9, in which the descent of the punch pushes the metal through the die 13. This punch has a first part 14, the radius of which is less than the radius of the corresponding part 15 of the die, and a second part 16, of diameter substantially equal to that of the corresponding part 17 of said die, so that the metal of part 1 of the blank cannot rise upwards and is forced downwards, between the outer surface of the punch 14 and the inner surface 15 of the matrix.

Comme 1e montrent les fig. 10 ä 13, an peut egalement realiser des raccords en partant de deux fragments de tubes 18, 19 (fig. 10) ou de deux etuis 20, 21 (fig. 11), ceux-ci etant disposes de maniere que leurs fonds 22, 23 se fassent vis-ä-vis. As shown in Figs. 10 to 13, an can also make connections starting from two fragments of tubes 18, 19 (fig. 10) or two cases 20, 21 (fig. 11), these being arranged so that their bottoms 22, 23 are opposite each other.

Dans ce cas, les deux blocs 24, 25, dans les cavi- t6s respectives desquelles sont disposes les dlements 18, 19 ou 20, 21 pour realiser la soudure, comportent deux poin@ons axiaux coniques 26, 27 venant s'in- troduire Jans 1'alesage des elements ä essembler. Ces poingons 26, 27 ont une hauteur teile qu'apres sou- dure il se produit un fond commun 28, separant en deux 1'aldsage central de 1'dbauche, ou un bourrelet interieur. Ce fond ou ce bourrelet peut etre RTI ID="0002.0277" WI="11" HE="4" LX="1829" LY="258"> elimine pour obtenir 1'dbauche representee fig. 13. De toute maniere, 1'ebauche 28, obtenue par cette methode de soudure, est traitee soit par filage inverse, comme represente fig. 4 et 5, soit de preference par filage direct, comme represente fig. 9, et Fon peut obtenir de cette maniere un tube tres Jong par rapport ä son diametre. In this case, the two blocks 24, 25, in the respective cavities of which the elements 18, 19 or 20, 21 are arranged to carry out the weld, comprise two conical axial punches 26, 27 which are introduced Jans the boring of the elements to be assembled. These punches 26, 27 have such a height that after welding there is produced a common bottom 28, separating the central alsage of the blank in two, or an interior bead. This bottom or this bead can be RTI ID="0002.0277" WI="11" HE="4" LX="1829" LY="258"> eliminated to obtain the blank represented in fig. 13. In any case, the blank 28, obtained by this welding method, is processed either by reverse spinning, as shown in FIG. 4 and 5, or preferably by direct spinning, as shown in fig. 9, and Fon can obtain in this way a very Jong tube in relation to its diameter.

Claims

CLAIMS I. Process for manufacturing a bi-metallic tubular connector, characterized by the fact that two pieces are welded end to end, by impact and cold, each consisting of one of the metals intended to constitute the connector. and that the bi-metallic piece thus obtained is subjected to a cold spinning operation. He. Bi-metallic tubular connector obtained by the process according to claim 1, characterized in that the weld surface of the two metals which constitute it is of substantially frustoconical shape. SUB-CLAIMS 1. Process according to claim I, characterized in that 1'on operates an indirect spinning.

2. Procdde according to claim I, characterized in that 1'on operates a direct spinning.

3. Process according to claim 1, characterized in that the bead resulting from the welding is removed before proceeding with the spinning operation.

4. Process according to claim I, characterized in that the metal pieces are solid.

5. Process according to claim 1, characterized in that each of the pieces of metal which are to constitute the connection has the shape of a tube or a case and in that, after the welding operation, it eliminates both outer bead and the first inner bead produced by welding.

6. Process according to claim I, characterized in that one of the metals is copper and the other aluminum.