Mechanism of generating edge buckling in galvanized strips with mild character during coiling process and its solution

The closepacked edge wave appears in the process of payingoff (color coating line) after coiling process in continuous galvanizing line, and the uncoated area on the edge makes the strip out of use. By measuring the spot and analytically calculating the plastoclastic deformation of the strip in coiling process using the iteration of layer by layer, the effects of the number of coiling layers, coiling tension, strip thickness and minus crown on the stress field and displacement field of the strip in coiling process were quantitative studied, and the mechanism of generating this phenomenon was revealed. Based on the analytical results and measured data, the coiling technological parameters was modified, the defect of edge buckling generated in coiling process was effectively controlled, and the up-to-standard rate of products was markedly upgraded.