Abstract: Because of the complicated deformation, the research for a rectangular box relies mainly on finite element method (FEM) and experiment, so the development of intelligent control for non-axisymmetric part deep drawing is limited. On the basis of hypothesis that the deformation law of shear stress zero-line is the same as the equivalent axisymmetric workpiece, the approximate stress analysis solution in flange and sidewall area is obtained from the deformation characteristics of a rectangular box in the process of deep drawing. The method which is verified by the FEM simulation provides not only an effective means for studying the deformation law of a rectangular box, but also the theoretical basis for the parameter identification model and prediction model in the intelligent deep drawing control.

Key words: Axisymmetric workpiece, Deep drawing, Rectangular box, Stress analysis, flow field, train aerodynamics, uniform wind, exponential wind