Springback behaviors of tube numerical control bending under different geometrical parameters

Abstract

To realize the accuracy forming of diverse bent tubular components, the influences of geometrical parameters including the bending angle θ, the relative bending radius R/D, the outside diameter of tube D and the wall thickness of tube t on springback behaviors of high strength TA18 tube in numerical control (NC) bending are explored by finite element (FE) numerical simulation method. The results show that with increasing the θ or the R/D, the springback angle linearly increases, which can be described as a linear equation. With increasing the t, the springback angle first reduces and then increases, while the springback angle fluctuates mildly with increasing the D. Under the same D/t, the springback angle declines with increasing the D and t proportionally.