Investigation into Springback of Pipe Bending Using Local Induction Heating
Hu Zhong
(Dept. of Mechanical Engineering, Tsinghua University, 100084)

Abstract: Stresses and deformation states of pipe bending are investigated under loading or unloading with various pipe materials, size, bending radius and deformation temperature. A theorem of springback of large diameter pipe bending is presented. The springback angle is simulated by elastoplastic FEM. The experiments are carried out with pipe materials of 20, 10CrMo910 and 12Cr1MoV steel. Results of computations are in good agreement with FEM simulations and experiments.
Keywords: pipe bending, springback, induction heating, theory of plasticity, metal forming, computer simulation.