Method and forming die for fabricating torque joints

Details Method and forming die for fabricating torque joints Method and forming die for fabricating torque joints

B - Operations, Transporting

21

D

B21D 39/04 (2006.01) B21D 15/02 (2006.01) B21D 26/14 (2006.01) B21D 39/08 (2006.01) B21D 43/18 (2006.01) B21D 53/88 (2006.01)

Patent

CA 2255972

A method of fabricating or forming a tubular member (10) to produce a torque joint wherein the torque joint is formed using an external die arrangement (64) for electromagnetic concurrently forming longitudinal and circumferential or radial grooves in tubular members (10). For the concurrent formation of longitudinal and circumferential or radial grooves (76, 78), the external die (22) which encompasses the area of the components which is to be joined, has grooves (28) or recesses (26) machined in the circumferential inner surface of the die (22) such that upon the generating of an electromagnetic force by means of an internal coil (16) arranged within the area (20) which is to be deformed, the superimposed tubular member (10) is expanded outwardly so as to enter the recesses (26) or grooves (28) which are present in the inner encompassing surface of the external die (22). As a result, the interlocking groove structure or pattern formed in the tubular member (10) produces a torque joint.

Méthode de fabrication ou de formage d'un élément tubulaire (10) permettant de former un joint de torsion; selon cette méthode, on forme le joint de torsion en utilisant un moule externe (64) qui permet de créer par électromagnétisme des entailles longitudinales et, simultanément, des entailles circulaires ou radiales dans des éléments tubulaires (10). Pour créer des entailles longitudinales et, simultanément circulaires ou radiales (76, 78), le moule externe (22), qui recouvre la partie des composants devant être jointe, possède des entailles (26) ou des évidements (28), usinés à la surface circulaire interne du moule (22) de manière à ce que l'élément tubulaire superposé (10), sous l'action d'une force électromagnétique générée par une bobine interne (16) disposée dans la partie (20) à déformer, sorte à l'extérieur et rentre dans les évidements (26) ou les entailles (28) présentes à la surface interne du moule externe (22) qui recouvre la partie susmentionnée. Cette disposition permet de former un joint de torsion grâce à la structure ou au motif entrecroisés des entailles créées dans l'élément tubulaire (10).

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