Forming First year production engineering Rolling Rolling Average of true stress calculations Rolling Given: An annealed copper strip 225 mm wide and 25 mm thick is being rolled to a thickness of 20 mm in one pass. The roll radius is 300 mm, and the rolls rotate at 100 rpm. Find: Calculate the roll force and the power required in this operation. Rolling In previous Example calculate the roll force and the power for the case in which the workpiece material is 1100-0 aluminum and the roll radius, R, is 500 mm. Rolling Calculate the individual drafts in each of the stands in the tandemrolling operation shown in Figure Rolling Estimate the roll force, F, and the torque for an AISI 1020 carbon-steel strip that is 200 mm wide 12 mm thick, and rolled to a thickness of 6 mm. The roll radius is 200 mm, and it rotates at 200 rpm. Rolling A rolling operation takes place under the conditions shown in the accompanying figure. What is the position, xn, of the neutral point? Note that there are a front and back tension that have not been specified. Additional data are as follows: Material is 5052-0 aluminum; hardened steel rolls; surface roughness of the rolls = 0.025 um; rolling temperature = 210°C A flat-rolling operation is being carried out where h. = 6 mm, h f = 5 mm, w. = 300 mm, R = 250 mm, u = 0.25, and the average flow stress of the material is 275 MPa. Estimate the roll force and the torque.
