Punch rivet and also a method and apparatuses for attachment of individual components to one another of which at least one component is formed by a workpiece of composite material

Abstract

A punch rivet for the attachment of individual components to one another of which at least one component is formed by a workpiece of composite material, the punch rivet having a flange of larger diameter, a rivet section of smaller diameter and a ring-like component contact surface at the side of the flange adjacent to the rivet section and surrounding the rivet section, wherein the rivet section has a ring surface at its free end for the piercing of the two workpieces, with the punch rivet having a central passage which extends over the full length of the punch rivet and wherein the punch rivet has an inwardly directed projection in the region of the rivet section 14.

1 . A punch rivet ( 10 ) for the attachment of individual components ( 40 ,  42 ) to one another of which at least one component ( 40 ) is formed by a workpiece of composite material, with the punch rivet ( 10 ) having a flange ( 12 ) of larger diameter (D 1 ), a rivet section ( 14 ) of smaller diameter (D 2 ) and a ring-like component contact surface ( 18 ) at the side ( 16 ) of the flange adjacent to the rivet section ( 14 ) and surrounding the rivet section ( 14 ), wherein the rivet section ( 14 ) has a ring surface ( 22 ) at its free end ( 20 ) for the piercing of the two workpieces, with the ring surface standing at least substantially perpendicular to the central longitudinal axis ( 24 ) of the punch rivet and optionally having an inner concave ring surface ( 26 ) which forms the transition from the end face ( 20 ) of the punch rivet ( 10 ) to the hollow inner space ( 28 ) of the rivet section, with the punch rivet having a central passage ( 36 ) which extends over the full length of the punch rivet and wherein the punch rivet ( 10 ) has an inwardly directed projection ( 38 ) in the region of the rivet section ( 14 ).