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  • 1
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3949-3954 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Joining by forming of magnesium alloys is restricted by the limited forming capability ofmagnesium at room temperature. For this reason heating of the parts to temperatures of 220 °C ormore is required to form joints without cracks. State-of-the-art joining by forming methods (such asclinching 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 isneeded to achieve joints of acceptable quality. In this paper two new clinching methods “dielessclinching” and “dieless rivet-clinching” shall be introduced. Both methods work with a flat anvil asa counter tool, thus offering important advantages for the application in joining of Mg/Mg, Al/Mgor Fe/Mg joints. In joining by forming with a flat counter tool the proportion of crack inducingtensile stresses in the bottom part during the joining process is very low. Moreover the heat transferbetween the heated anvil and the parts is comparatively fast. That makes it possible to decrease theheating time in joining by forming with a flat counter tool to only one second or less. The dielessclinching process was simulated using the Finite Elements Method (FEM) to analyze the influenceof geometrical parameters of the punch and the process parameter clamping force. Furthermore thelimitations of the new dieless joining method were investigated
    Type of Medium: Electronic Resource
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