Extruded and bent profiles are important structural elements in lightweight constructions, e.g. car bodies. Increasing demands for cost-effectiveness and better quality lead to a new extrusion process for the manufacturing of rounded profiles. Experiments have shown that rounding during extrusion leads to workpieces which are better than conventionally bent profiles. They have no cross-section deformations, no residual stresses, full formability, and highest shape accuracy. This paper presents the direct rounding of profiles. In this process an external guide tool applies a lateral force to the leaving profile in such a way that it is deflected. By this superposition of a moment and a force, the material flow in the die is influenced, and the profiles leave the die in a rounded shape. The accuracy of the rounded contour is excellent, and a cross-section deformation does not occur. As this technology is cheaper, better, and easier to handle compared to conventional bending processes, for which distinct knowledge is crucial, it may replace demanding bending applications completely.
Direct rounding of profiles during extrusion
Direktes Rundbiegen von Profilen beim Strangpressen
2000
5 Seiten, 11 Bilder, 8 Quellen
Aufsatz (Konferenz)
Englisch
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