Multi-piece self pierce rivet die for improved die life

A die for shaping a self-pierce rivet, comprising:

• a one piece anvil that is disposed along an axis and includes:
• a first portion that has a first perimeter surface;
• a second portion that is coaxially disposed with the first portion, the second portion having an end surface and a second perimeter surface that extends from the end surface;
• and
• a flange portion having an upper surface and a lower surface disposed opposite the upper surface, wherein the upper and lower surfaces extend from the first and second perimeter surfaces, respectively, and away from the axis;
• and
• a collar fixedly disposed on the anvil, the collar having an interior surface, an exterior surface disposed opposite the interior surface, and a mating surface that extends from the interior surface to the exterior surface;
• wherein the interior surface of the collar engages the second perimeter surface and the mating surface of the collar engages the upper surface of the flange portion.