Abstract
A reliable analytical model that determines the surface profile of a workpiece (material) in round–oval–round pass sequence has been established. The surface profile of an outgoing workpiece is computed by using the linear interpolation of the radius of curvature of an incoming workpiece and that of roll groove to the roll axis direction. The validity of the surface profile model has been examined by hot rod rolling experiment with the roll gap and the design of oval groove changed. The surface profile and cross sectional area of a workpiece predicted by the new model were in agreement with those obtained experimentally.
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