Jan 01, 2010 · Rolling force acting on horizontal roll By the upperbound method, the rolling force acting on the horizontal roll can be expressed as Rh w + N rw+ N hb+ N h, + N 3 + Ph = 2hL wVI :(N N'3+N,+N5) (25) n, =KwH wl b; v, is.1) (18) 3 Rolling Force Acting on Vertical Roll 2. 3 Friction power on contact surface between flank of horizontal roll and ...