Abstract：In a grain-oriented silicon steel rewinding line,due to adopting the constant tension winding method and the coreless winding scheme,about 5% coreless wound rollers collapse after stripping,causing heavy economy loss. In order to investigate the mechanism and influencing factors of the heart-shaped roll,and to reduce the probability of collapse,an inner stress model for winding and stripping was proposed based on the elastic superposition theory and the axisymmetric model. Base on the proposed model and the buried pressure tubes model,a critical criterion for heart-shape buckling of winding coils was obtained. Buckling parameters of 12 groups heart-shape roll with thickness of 0.23 and 0.283 mm were measured,which conform to that predicted by the proposed model,validating the accuracy of the model. Finally,the influences on parameters such as the thickness and roughness of the steel strip,and the equivalent radial stiffness of the rubber layer,were studied. It is found that as the thickness and roughness of the steel strip,and the equivalent radial stiffness of the rubber layer increasing,the probability of the heart-shape buckling and the buckling layers increase,which conforms to actual condition. By decreasing the thickness and increasing the elastic module of the rubber layer,the equivalent radial stiffness increase,leading to significant decrements of the coil pressure,the probability of buckling and the thickness of buckling layers.
唐伟, 陶桂林, 王兴东, 孔建益, 王紫阳, 李震. 薄硅钢收卷内应力及无芯筒料卷心形坍塌机理[J]. 钢铁, 2021, 56(10): 99-107.
TANG Wei, TAO Gui-lin, WANG Xing-dong, KONG Jian-yi, WANG Zi-yang, LI Zhen. Internal stress of coreless thin silicon steel coil and collapsing mechanism of coreless heart-shaped coil[J]. Iron and Steel, 2021, 56(10): 99-107.
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