Family of fixation devices with variable taper

Details Family of fixation devices with variable taper Family of fixation devices with variable taper

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 5/02 (2006.01)

Patent

CA 2761986

According to the prior art, there is a multiplicity of drilling and length families by fixation diameter recognition, contrarily to cylindrical smooth portion fixations for which a single tool is not sufficient. The person skilled in the art must plan the adequate tool and device for each thickness of a member to be clamped, which represents an important tool cost and also a time loss due to the change of tools. The purpose of the invention is to adapt the taper ratio (C1; C2) of the device (1, 20) based on the thickness to be clamped (12, 31). Preferably, the taper ratio of the bushings ranges between 1 and 4 %. Accordingly, using three to four reference sets of devices having the same outer diameter (16A, 16C) but a different taper ratio, it is possible to clamp any potential member thickness with modifying the bore diameter of members to be assembled.

Famille de dispositifs de fixation à conicité variable. Dans l'état de la technique, il existe une multitude de familles de perçage et de longueur, par repère de diamètre de fixation, contrairement aux fixations à partie lisse cylindrique pour lesquelles un outillage unique est suffisant. L'homme du métier doit prévoir l'outil et le dispositif adéquats pour chaque épaisseur d'élément à serrer, ce qui représente un coût en outillage important et également une perte de temps due au changement d'outillage. Dans l'invention, on a eu l'idée d'adapter un taux de conicité (C1; C2) du dispositif (1; 20) en fonction de l'épaisseur à serrer (12; 31). De préférence, le taux de conicité des douilles est compris entre 1% et 4%. Ainsi, avec trois ou quatre jeux de références de dispositifs de même diamètre extérieur (16A; 16C), mais de taux de conicité différent, on peut serrer toutes les épaisseurs d'éléments envisageables, sans modifier le diamètre d'alésage des éléments à assembler.

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