Research on the deformation optimization of tube forming under magnetic pulse force

In this work, the deformation optimization of electromagnetic tube forming has been investigated through the combination of the sequential coupling numerical simulation, the design optimization and experiments. The results show that the distribution of the homogeneous-radial deformation along axial direction is relative and it corresponds to a critical length ratio, which increases with the aspect ratio of coil. The optimal tube length is insensitive to the discharge voltage. It is 92.44 mm corresponding to the 100 mm long coil that agrees well with the experimental results. The relative error between the experimental value and the discharge voltage forecast is less than 5.9%. These results indicate the deformation optimization of tube forming under magnetic pulse force based on the combination of FEM and the design optimization is feasible, which can be used to initialize the discharge voltage and realize the controllable deformation.