| 摘要 |
<p>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 installation 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 interlock with the pierced panel edge. There is provided an installation apparatus for installing self-attaching fasteners each fastener having a body portion and an annular wall extending from said body portion in generally coaxial alignment, said installation apparatus including a base member and a relatively moveable spaced nose member, said nose member including a first passage receiving said fasteners and communicating with a transverse plunger passage, a plunger moveable with said base member and telescopically receivable through said plunger passage for driving a fastener therethrough into a panel located opposite said plunger passage, said plunger passage terminating in a generally conical recess opposite said plunger which receives and supports said annular wall of said fasteners thereby centering said fasteners in said plunger passage ready for installain the end of said plunger configured to receive the free end of said fastener body portion, and upon receipt of a fastener in said plunger passage conical recess said nose member moveable relative to said plunger to first receive said fastener body portion free end in said plunger bore assuring orientation of a fastener ready for installation, and actuating means then actuating said apparatus to relatively move said plunger through said plunger passage and said oriented fastener through said plunger passage conical recess installing said oriented fastener in a panel.</p> |
