Research on the roll contour of finishing work roll in hot rolled wide strip production line
Hot strip mills are prone to edge wraping defects in the later stages of the same-specification product continuous production,es-pecially for wide-specification products.To solve this problem,the influence of different CVC roll contour parameters on the variation of the finishing work roll contour curve for hot rolled wide strip mills is analyzed,and the application of CVC roll contour+concave roll con-tour combination is studied.The results show that there is a negative correlation between the end roll diameter difference and the middle roll diameter difference of CVC roll,and an example of 2 050 mm hot rolling production line is given to illustrate this.This provides ref-erence for the determination and optimization of CVC roll contour curves.The advantages and disadvantages of practical application of concave roll are introduced by analyzing the concave roll curve determining method and the axial shifting method of the concave roll,and the relationship between the bending change of the concave roll and the heat expansion value of the roll is analyzed theoretically,which shows that the CVC roll contour+concave roll contour combination can effectively solve the edge warping defect,extend the rolling kilo-meterage.Finally,the validity of its effectiveness is verified from the application angle by listing the changes in edge wraping of the same specification and steel grade after production.
hot continuous rollingCVC roll contourroll contour parametersconcave rolledge warping
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