Method of welding a component to a shape memory alloy...

B - Operations – Transporting – 23 – K

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B23K 26/28 (2006.01) A61F 2/06 (2006.01) A61F 2/90 (2006.01) A61L 31/18 (2006.01) B23K 26/42 (2006.01) F16B 5/07 (2006.01) F16B 5/08 (2006.01) F16B 7/22 (2006.01)

Patent

CA 2659170

A method of cutting, polishing and then welding together two metallic components (10, 18), in which the respective components (10, 18) are cut to define respective cut surfaces (14, 16) that are to be polished and fitted together, both to define the relative positions of the two components (10, 18) to be fixed by the welding and to provide facing weld surfaces at which the two components (10, 18) can be welded together. The method is characterized by the steps of i) making at least one extra cut (20), to create at least one zone of elastic deformation that deforms when the cut surfaces (14, 16) are fitted together; ii) polishing the cut surfaces (14, 16) before fitting them together; and iii) designing the dimensions of the cut components (10, 18) so that the zones of elastic deformation compensate for the variations of dimensions caused by the polishing step, thereby retaining the capability of the polished cut surfaces (14, 16, 20) to define said component (10, 18) relative positions during the welding step.

La présente invention concerne un procédé de découpe, de polissage, puis de soudage de deux composants métalliques (10, 18), dans lequel les composants respectifs (10, 18) sont découpés pour définir des surfaces de coupe (14, 16) respectives qui doivent être polies et assemblées, pour définir les positions relatives des deux composants (10, 18) à fixer par la soudure et pour fournir des surfaces de soudure se faisant face sur lesquelles les deux composants (10, 18) peuvent être soudés l'un à l'autre. Le procédé se caractérise par les étapes consistant à : i) faire au moins une coupe supplémentaire (20), pour créer au moins une zone de déformation élastique qui se déforme lorsque les surfaces de coupe (14, 16) sont assemblées ; ii) polir les surfaces de coupe (14, 16) avant de les assembler ; et iii) concevoir les dimensions des composants coupés (10, 18) de telle sorte que les zones de déformation élastique compensent les variations de dimensions dues à l'étape de polissage, maintenant ainsi la capacité des surfaces de coupe polies (14, 16, 20) à définir les positions relatives dudit composant (10, 18) pendant l'étape de soudage.

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