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Dieless clinching and dieless rivet-clinching of magnesium

: Neugebauer, Reimund; Dietrich, S.; Kraus, C.

Volltext urn:nbn:de:0011-n-552726 (759 KByte PDF)
MD5 Fingerprint: 2d0720926a27b996715ae8da624189b3
Erstellt am: 1.4.2011

Micari, F.:
Sheet Metal 2007, 12th International Conference on Sheet Metal. Proceedings : University of Palermo, Italy, April 1st-4th 2007
Stafa-Zürich: Trans Tech Publications, 2007 (Key engineering materials 344)
ISBN: 0-87849-437-5
ISBN: 978-087849-437-8
International Conference Sheet Metal (SheMet) <12, 2007, Palermo>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWU ()
magnesium; mechanical joining; clinching

Joining by forming of magnesium alloys is restricted by the limited forming capability of magnesium at room temperature. For this reason heating of the parts to temperatures of 220 °C or more is required to form connections without cracks. State-of-the-art joining by forming methods (such as clinching or self-pierce riveting) are usually working with a contoured die as a counter tool. Researches on these joining methods have shown that a minimum heating time of 3 to 6 seconds is needed to achieve connections of acceptable quality. New joining by forming methods working with a flat anvil as counter tool make it possible to decrease the heating time considerably. In this paper two methods - the dieless clinching and the dieless rivet-clinching - and their potential for the joining of magnesium parts shall be introduced in detail. The results of extensive research on the influence between heating parameters and the formation of the connections as well as the results of tensile test done to characterize the strength of dieless joined connections are discussed.