Procedure for cramping by riveting, cramping obtained by this procedure and tool to perform the cramping

摘要

Procedure for cramping by riveting, cramping obtained by this procedure and tool to perform the cramping, in that a protruding lug (15) is made in a section (17) and a slightly larger perforation (6) is made in the same section, in that the part equipped with the lug is fixed in a progressive stamping machine with the lug projecting from the front of the core (3) where it is situated, with movement then being provided to a moving core or ram (2), which doubles the first section over the other, thus housing the lug in the perforation and causing the said lug to partially protrude from the outer surface of the first section. The moving core (2) or ram is provided with a projecting wedge (18), which cuts into the lug and splits it into two lips (19), which are pressed down onto the outer surface of the first section.