New approach for the prediction of stress free surface profile of a workpiece in rod rolling

An analytical model that predicts the surface profile of a workpiece in oval-round pass rolling has been proposed. The surface profile of a workpiece can be modeled when the maximum spread of it is known beforehand. The surface profile of an outgoing workpiece was formulated by using a weighting function and a linear interpolation of the radius of curvature of an incoming workpiece and that of roll groove to the roll axis direction. The validity of surface profile model has been examined by hot rod rolling experiment.