Method for the pressing of a press fitting and pressing tool...

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 13/14 (2006.01) B21D 39/04 (2006.01) B25B 27/10 (2006.01)

Patent

CA 2658938

The invention firstly relates to a method for the pressing of a press fitting (3), with a tube (2) inserted into the press fitting (3), by means of a pressing tool (1), wherein the press fitting (3) has an encircling bead (31) in which an O-sealing ring (32) is placed, wherein the tube (2) ends within the press fitting (3) and a first pressing is carried out within the bead (31), wherein, furthermore, a further pressing is carried out on the tube-insert side of the press fitting (3) at a distance from the bead, the further pressing leading to press fitting (3) and tube (2) obtaining a conicity which prevents them being pulled off and runs in the same direction. Furthermore, the invention relates to a pressing tool (1) suitable for carrying out the method. In order to further improve a method of the type under discussion, in particular for simplifying the handling over the course of the pressing operation, and in order to improve a pressing tool of the type under discussion, in particular in terms of handling while maintaining the functional reliability of the press connection which is to be produced, it is proposed, in terms of the method, that the bead (31) is widened axially over the course of the pressing operation by being acted upon radially from the outside. In terms of the object, it is provided that the first pressing geometry (21), which is assigned to the bead (31), leaves the bead (31) space at least in one direction for the axial widening of the bead (31).

L'invention concerne d'une part un procédé de compression au moyen d'un outil de presse (1) d'un raccord de compression (3) sur un tube (2) inséré dans le raccord de compression (3). Le raccord de compression (3) présente un bourrelet périphérique (31) dans lequel un joint torique (32) est placé. Le tube (2) se termine à l'intérieur du raccord de compression (3), et on réalise une première compression à l'intérieur du bourrelet (31). Une autre compression qui forme dans le raccord de compression (3) et le tube (2) des conicités qui s'étendent dans le même sens et qui empêchent l'extraction est réalisée à distance du bourrelet du côté de l'insertion du tube du raccord de compression (3). L'invention concerne en outre un outil de presse (1) qui convient pour mettre en AEuvre le procédé. Pour encore améliorer le procédé du type indiqué, en particulier pour simplifier les manipulations au cours de l'opération de compression et pour améliorer l'outil de compression concerné, en particulier en termes de manipulation, tout en maintenant la sécurité fonctionnelle de la liaison comprimée établie, l'invention consiste, en termes de procédé, à ce que le bourrelet (31) soit évasé axialement au cours de la compression en étant sollicité radialement vers l'extérieur. En ce qui concerne l'outil de compression, l'invention a pour objet que la première géométrie de compression (21) associée au bourrelet (31) dégage pour le bourrelet (31) de l'espace dans au moins une direction pour permettre l'élargissement axial du bourrelet (31).

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