Self-drilling hollow rivet

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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Details

F16B 19/08 (2006.01)

Patent

CA 2138523

A self-drilling hollow rivet (10) has a bit (11) and a rivet sleeve (12) to hold a first and a second component (16, 17) together. In order to secure the components (16 and 17) rigidly together, a rivet hole (15) is drilled by the bit(11) in a first operation. The bit (11) is given a positive and force fit in the rivet sleeve (12) by means of ribs (19', 19''). At the outer periphery of a set heat (20) there are flat surfaces with which a setting device engages. The setting device rotates the self-drilling hollow rivet. The rotary forces are uniformly trans- ferred by the self-drilling hollow rivet (12) to the bit (11) via the ribs (19, 19'') without the drill shaft's (18) breaking at the weakened point (19) during the drilling process. Once the drilling process is completed, the self-drilling hollow rivet (10) is set in a second operation in which the drill shaft (18) is pulled in the direction of the arrow (20'). Here, the claws of the serting device engage in the annular grooves (27). In this setting process the drill head (14) is pulled in- to the rivet sleeve (12) and the latter almost completely surrounds the drill head (14). The closing head is made and the hollow rivet is hermetically sealed.

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