Low swage load fastener and fastening system

Details Low swage load fastener and fastening system Low swage load fastener and fastening system

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 19/08 (2006.01) B21J 15/02 (2006.01) B21J 15/34 (2006.01) F16B 19/05 (2006.01)

Patent

CA 2379926

A fastening system including a two piece swage type fastener (10) including a pin (12) and a collar (14) in which the pin (12) has relatively wide lock grooves (26) and in which the lock grooves (26) have a generally smooth root contour with the collar (14) having a shank portion (69) with a wall thickness defining an excess volume of material prior to swage greater than the volume of the confronting lock grooves (26) and with the clearance between the inside diameter (ID) of the collar shank portion (69) and the diameter (Du) of crests (71) of the lock grooves (26) being a minimum to reduce the compressive force required to swage the collar shank (69) into the lock grooves (26) and with the excess volume of collar shank (69) material providing only a partial fill of the lock grooves (26) upon swage.

L'invention concerne un système d'assemblage comprenant un dispositif d'assemblage comprenant une fixation (10) en deux parties de type à emboutissage comprenant un axe (12) et une bague (14), l'axe comportant des gorges de verrouillage (26) relativement larges. Les dites gorges de verrouillage (26) présentent généralement un contour de base lisse; la bague (14) comprend une partie de tige (69) ayant une épaisseur de paroi définissant une surépaisseur de matériaux avant emboutissage supérieur au volume des gorges de verrouillage correspondantes (26). Le dégagement entre le diamètre intérieur (ID) de la partie de tige (69) de la bague et le diamètre des crêtes (71) des gorges de verrouillage (26) étant réduit au minimum de manière à réduire la force de compression nécessaire pour emboutir la partie tige (69) dans les gorges de verrouillage (26), la surépaisseur de la partie tige (69) ne remplissant que partiellement les gorges de verrouillage (26) au moment de l'emboutissage.

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