Self-Piercing Riveting Machine (SPR)

The SPR Process
Self-piercing riveting is a cold-joining process where a rivet, driven by an external force, pierces through the upper and middle layers of material and flares out within the bottom layer. This creates a mechanically interlocked plastic deformation, forming a robust permanent joint.
These joints offer high tensile and shear strength, resulting in what is commonly known as a “lock-riveted” connection.

Main Functions
SPR is a high-efficiency riveting process that drives a rivet directly into the metal under pressure, eliminating the need for pre-drilled holes or manual rivet placement. A self-piercing riveting machine (SPR Equipment) can automatically complete the entire cycle including loading, positioning, and riveting in under 2 seconds.