Stamping rivet upsetting tool comprises die endface which is radially divided into sectors outside raised area

摘要

The tool has a holding down device (20) for the sheets with a rivet punch (25) moving axially in its cylinder (24), and a die (27) opposite the holding-down device, with a raised area (34). The die endface (36) is divided radially outside the raised area into sectors (35) which can move relative to each other, depending on the force exerted on each of them.