Analysis of asymmetrical cold and hot bond rolling of unbounded clad sheet under constant shear friction

摘要

An analytical model for asymmetrical cold and hot bond rolling of two-layer unbounded clad sheet unbounded before rolling is derived to investigate the stress field using a direct formulation. Constant shear friction between the rolls and the clad sheet is assumed. Due to different roll speeds and roll radii, two neutral points and one bonding point are generated at the roll gap; the plastic deformation regions can be divided into four zones. The neutral points, the rolling pressure distribution, the horizontal stress of the whole clad sheet, the horizontal stresses in the component layers, the shear stress at the interface, the rolling force, and the rolling torque, can be easily and rapidly calculated. The determination of the bonding point and the clad thickness ratio at the exit are of great important. The results obtained from this study have been compared with experiment [Y.M. Huang, T.H. Chen, H.H. Hsu, Analysis of asymmetrical clad sheet rolling by stream function method, Int. J. Mech. Sci. 38 (1996) 443-460] to verify the feasibility of the model.