How many dies are used by rivet squeezes to form the rivet?

Rivet squeezes utilize two dies to effectively form a rivet. The process involves one die being fixed, which supports the rivet during the squeezing operation, while the second die exerts pressure to shape the rivet. This dual-die system permits controlled deformation of the rivet and ensures that it properly flares out and holds securely against the materials being joined. The interaction between the two dies allows for consistent and precise results in the riveting process, which is crucial for maintaining structural integrity in aerospace applications.