| 摘要 |
PURPOSE: A method for preventing the crown quantity fluctuation of steel strips by rolling load fluctuation of a rolling process is provided to improve convenience by expressing vendor pressure control incremental value for automatic shape control of rolling load as a theoretical formula. CONSTITUTION: A method for preventing the crown quantity fluctuation of steel strips by rolling load fluctuation of a rolling process comprises followings. The crown quantity of a steel sheet(300) is calculated due to rolling load fluctuation generated on a steel sheet during steel sheet rolling. The rolling load fluctuation by the fluctuation of the bender pressure is calculated. The crown quantity of the steel sheet to which the incremental value of the rolling load is added is calculated through the rolling load fluctuation. The crown fluctuation of the steel sheet by the rolling load fluctuation is calculated using the crown quantity. The pressure output incremental value of vendor cylinders(400a,400b) is calculated by dividing the vendor pressure applied on the both sides of the steel plate with the total area of vendor cylinders. Output adjustment factor multiplied in the pressure output incremental value of the vendor cylinder is calculated.
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