PIN RETENTION METHOD AND APPARATUS

摘要

A pin (6) which has a compressive strength less than the tensile strength of a substrate (1) can be fixed into a hole in the substrate when the substrate is held between a stopping block (2) and a clamp (3) by transporting the pin (6) through a passage (5) into the hole with sufficient kinetic energy that the pin is forged into a shape defined by the hole upon impacting the stopping block (2). The pin can be retained in the substrate by forging it into a headed and bulged shape (9, 10) defined by recesses (7, 8) in the stopping block and the clamp on either side of the hole in the substrate (1).