Influences of Clamp Die Geometry and Friction on the Clamping Process in Rotary Draw Bending

摘要

Rotary Draw Bending (RDB) is applied to bend tubes and profiles with thin wall thicknesses and small bending radii.rnThese are used in the automotive, chemical and furniture industry, for example. The determination of process parameters isrndone empirically or by FE-Analyses (FEA), so far. The required bending moment has to be transmitted by the clamp dies tornthe tube. Only by a correctly adjusted clamping force slipping of the tube through the clamp dies or inadmissible deformationrncan be prevented. For an analytical determination of the clamping force influences like friction and geometry of the clamprndies have to be considered. These influences are determined by calculations, FEA and experiments.