Considering the characteristics of large cylindrical shell rolling,such as double driving rolls,asymmetrical rolling and huge workpiece,a slab method was developed to establish the rolling force model.In this model,the nonuniform normal and shear stresses and the upper and lower surface temperatures of the workpiece were taken into account.Moreover,the flow stress model,considering the dynamic recovery and dynamic recrystallization behaviors of the material,was established.The rolling pressure distribution,the rolling force,the rolling torque and the neutral points could be calculated quickly and easily by the rolling force model.The predicted results were shown to be in good agreement with the measured values,which indicated that the model can satisfy the requirement of industrial application.
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