Abstract: Silicon steel often has convex and coil collapse defects during the coiling process, which seriously affect the quality of the steel coil and reduce the yield rate of the steel coil. In order to analyze the causes of convex and coil collapse defects in the coiling process of silicon steel, a mathematical model was established firstly for the stress field during the steel coil coiling process, and the stress calculation method during the coiling process was analyzed. Secondly, the reel was physically modeled to determine the position of the strain gauge. Then, the strain gauge was installed on the silicon steel production line. The relationship between the strain of the steel coil during the coiling process and the coiling quality was analyzed through the values of the strain collected by the strain gauge over time. The data collected by the strain gauge lays a technical foundation for preventing convex and coil collapse in silicon steel coiling.

Key words: silicon steel, convex, coil collapse, stress and strain analysis