| 摘要 |
A self-piercing rivet comprises a head (11) and a shank (3). The shank has a circular external profile and is formed with a hexagonal poke (4) whereby zones of weakness are formed at each apex of the hexagon. The poke (4) has an angled lead-in (8) so that as the rivet is set a radially outward force is produced on the wall of the poke causing the poke to split along the zones of weakness. Rose setting is thus obtained without the use of a profiled setting tool. |
