Effect of double taper roller shape on the waved surface of strips in continuous annealing process

The finite element method is applied to quantitatively analyze the effect of double taper roller shape on the waved surface of strips in continuous annealing proeess. According to the simulation results, the waved surface initially oecurs in the strip area on the taper shoulders, at which the tensile stress and transverse stress experience a dramatie ehange, and the transverse compressive stress and equivalent stress have the largest values in the area. This finding is consistent with the real case. The occurrence probability of waved surfaces enlarges with the total taper-to-taper ratio increasing as well as with the length and diameter of the roller's flat section decreasing. Among the faetors, the length of the flat section has the most significant influence on the waved surfaee of strips, then the total taper and the taper ratio, and finally the diameter of the flat section.