F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/123
F16B 37/04 (2006.01) B23P 19/04 (2006.01) B26F 1/02 (2006.01) F16B 13/00 (2006.01) F16B 29/00 (2006.01)
Patent
CA 1270391
ABSTRACT The present disclosure relates to self-piercing fasteners, such as studs, bolts or nuts, the method of attaching such fasteners to a panel and fastener installa- tion apparatus, including the installation head and die button. The fastener includes a self-piercing and riveting annular wall which is driven into a panel supported against a die member by the installation head. The die member includes an annular die cavity surrounding a central projecting die portion which is telescopically receivable in the free open end of the fastener annular wall. The free end of the fastener annular wall includes a piercing surface which mates with a piercing surface at the outer edge of the projecting die portion to pierce a slug from the panel. The panel slug is then pressed into the opening in the annular fastener wall by the conical end of the projecting die portion and the free end of the annular wall is simultaneously deformed radially outwardly in the die cavity forming a rigid mechanical inter- lock with the pierced panel edge . There is provided a fastener and panel assembly, said fastener having a body portion and an annular wall portion extending from said body portion, said annular wall portion including a first tubular portion adjacent said body portion having generally parallel walls and a second radially outwardly hook-shaped end portion, said panel including a slug pierced from the main portion of said panel by said annular wall disposed in said first tubular annular wall portion in engagement with the internal surface of said first tubular portion, and said panel having a portion adjacent the pierced panel edge displaced from the plane of said main panel portion engaging the exterior surface of said first tubular annular wall portion and deformed in said hook-shaped portion, forming a mechanical inter- lock between said panel and said fastener annular wall portion.
595691
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