HENROB - Self Pierce Riveting

Innovative Joining Solutions

What is HSPR?

Henrob Self-Pierce Riveting (HSPR)

Henrob Self-Pierce Riveting (HSPR) is a cold joining process used to fasten two or more sheets of material by driving a rivet through the top sheet(s) and upsetting the rivet, under the influence of a die, into the lower sheet without piercing it.

Speed and quiet operation are features of each system. Typical riveting cycle time ranges from 1.0 to 4 seconds.

HSPR has a number of advantages over other joining techniques, such as welding and blind riveting:

• joins a range of dissimilar materials such as:
  • steel
  • aluminium
  • plastics
• joins multiple material stacks
• non-thermal process – can be used after coating or painting with virtually no aesthetic or other damage
• low energy demands
• fast cycle times
• operator and environment friendly; no heat, fumes, sparks or waste
• repeatable quality
• visually checkable joint
• compatible with adhesives and lubricants
• automatic rivet feed allows continuous production