The application of innovative joining technologies as well as joining strategies are necessary to achieve a flexible and competitive production of frame structures, which fulfill the condition of lightweight constructions as structural parts, cabins, or chassis frames. As the joint design must be developed taking into account holistic aspects to exclude suboptimal solutions, joining by forming is expected to be an attractive alternative to thermal-based joining processes, e.g. welding. In the present paper, investigations have been carried out to evaluate both feasibility and capability of joining by forming processes. Joining has been accomplished by compressing or expanding cylindrical profiles using rigid tools for rolling-in processes, fluid active medium for hydro-forming as well as active energy for electromagnetic forming. Experimental results on primarily force-fit joints of tubes and massive cylindrical mandrels by rolling-in and by electromagnetic were discussed to evaluate the different joining processes. The material quality of different light metals (aluminium alloys AA6060, AA2007, magnesium alloys) in the joining processes was analysed, regarding the influences of process parameters on mechanical properties of the joints. Typical industrial applications in the manufacturing process are addressed. Further basic developments for the manufacturing of dominating form-fit joints by hydroforming as well as by electromagnetic forming are currently in the focus of investigations.
Joining by forming of lightweight frame structures
2006
12 Seiten, 12 Bilder, 26 Quellen
Article/Chapter (Book)
English
Frame joining structure, frame joining method, and vehicle
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