U. K. Yoo, J. B. Lee, J. H. Park, Y. Lee*
The Journal of Mechanical Science and Technology, vol. 24, no. 11, pp.2289-2295, 2010

Abstract : This paper presents an analytical model that predicts the surface profile of a workpiece in a round-to-2−R oval groove and a square section-to-2−R oval groove rolling sequence. “2−R oval” indicates a profile of the roll groove that has two different radii of curvature. Using low carbon steel (S10C) and stainless steel (STS304), we conduct a hot groove rolling experiment to verify the robustness of the proposed model. Results show that the predicted surface profile and exit cross-sectional area are in good agreement with experimental results. The second radius of curvature of the 2−R oval groove is important in reducing the exit cross-sectional area of the workpiece and partly squeezing the workpiece outward (i.e., in the roll gap direction) when in contact with the workpiece. Therefore, the surface profile of the workpiece in the 2−R oval groove is smaller than that of the 1−R oval groove.

Keyword : Modeling; 2-R oval groove; Surface profile; Groove rolling