Investigation of the influence of varying tumbling strategies on a tumbling self-piercing riveting process

Abstract The increasing demands for the reduction of carbon dioxide emission require intensified efforts to increase resource efficiency. Especially in mobility sector with large moving masses, savings can contribute enormously emissions. One possibility is reduce weight vehicles by using lightweight technologies. A frequently used method implementation multi-material systems. These consist dissimilar materials such as steel, aluminium or plastics. In production these systems, joining different and geometries a central challenge. Due on joints, challenges processes itself are also increasing. Since conventional rather rigid only react limited extent disturbance variables changing process variables, new methods technologies required. widely properties self-piercing riveting. Because tool combination fact that rivet geometry be related tools, systems requires changes during process. order extend window elements, enhanced tumbling kinematic punch. integration results significant adjustable parameters. This enables higher material flow control through specific strategy. investigated steel an alloy, which differ significantly their mechanical have many applications automotive engineering, especially structural car body components. galvanized HCT590X+Z dual-phase characterised low yield strength, combined high tensile strength good hardening behaviour. alloy EN AW-6014. precipitation-hardening consists aluminium, magnesium silicon energy absorption capability. objective this work obtain fundamental knowledge riveting With sheet thicknesses partners, influences parameters strategy analysed. Such based angle, onset kinematics. context selected combinations consisting variation parameters, versatility identified. To illustrate results, force–displacement curves from individual joints compared undercut heads geometrically measured. Furthermore, micrographs allow analysis characteristic joint interlock, residual thickness end position head.