Theoretical analysis of nonequilibrium axial force for cross wedge rolled asymmetric shaft
Abstract：The nonequilibrium axial force in the cross wedge rolled asymmetric shaft will result in such forming defects as axial movement and cutting-step.Therefore,the axial projection of helicoid was divided into two cases,and the boundary conditions for different cases were determined.In addition,the projection areas of contact surface in three coordinate directions were accurately solved,and then the formula of axial force was derived with considering the effect of axial friction force between the die and rolled shaft-segment.The proposed formula was used to select the technological parameters for asymmetric rolling.The finite element（FE） model for die segmentation was established with DEFORM-3D FE software,and the nonequilibrium axial force acted on both sides of step were measured.It is found that the axial force acted on both sides of step basically tends to be equal.It indicates that the proposed formula can be used to calculate the technological parameters for rolling the asymmetric shafts.
Keywords：cross wedge rollingasymmetric rollingnonequilibrium axial forcecontact areaaxial projectionadditional rolling forcetechnological parameter selectiontheoretical analysis
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)