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Research on work roll contour for improving the flatness defect of electronic aluminum foil

Electronic aluminum foil strips have extremely large width-to-thickness ratios and often exhibit tight-edge and rib-wave defect after rolling. To improve this special flatness defect, the defect distribution characteristics, section profile of aluminum foil strip, and defect cause were analyzed; and a new work roll contour was designed based on the idea of partial variable diameter. The new work roll contour is a combination of multiple curves, and the influences of the various curve parameters on the contour were researched. A finite element simulation model based on ABAQUS was established to study the control characteristics of the flatness defect when using the new work roll contour. Simulation results and actual production data of the 1450 aluminum foil rolling mill show that the new work roll can increase the depression of the tight-edge area and improve the flatness defect of tight-edge and rib-wave.