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Spot-joining - new technologies in the field of joining by forming

: Neugebauer, Reimund; Dietrich, S.; Mauermann, R.

Kiuchi, M.:
Advanced technology of plasticity 2002. Vol.2 : Proceedings of the 7th International Conference on Technology of Plasticity, Yokohama, October 27 - November 1, 2002
Tokyo: Japan Society for Technology of Plasticity, 2002
International Conference on Technology of Plasticity (ICTP) <7, 2002, Tokyo>
Conference Paper
Fraunhofer IWU ()
assembly; finite element method (FEM); joining by forming; selfpierce-riveting; clinching; rivet clinching; dieless rivet clinching; flat counter tool; hydroforming; hydrojoining; aluminum; joining method; dieless; anvil; joining force reduction; Clinchen; Nietclinchen; matrizenlos Nietclinchen; Stanznieten; Fügen; Hydrofügen; Fügekraftreduzierung; Fügeverfahren; Aluminium; Hydroumformung; Matrize; Amboss; matrizenlos; Finite-Elemente-Methode (FEM)

The object of this paper are new developments in the field of joining by forming. The possibilitiy of reducing the setting force in spot-joining operations by modifying the kinematics of the punch is described. This reduction of the setting force is not only an advantage because of the possible weight reduction of the joining equipment but also because it allows the integration of spot-joining by forming operations into hydroforming processes at comparable low fluid-pressure. Furthermore a new method of spot-joining by forming shall be introduced, where contrary to standard technologies like clinching or self-pierce riveting the die has no cavity and therefore a high concentricity tolerance between punch and die is obtained.