| 摘要 |
PURPOSE:To manufacture cold rolled products with better accuracy of sheet thickness by calculating two kinds of predicted value of rolling load corresponding to rolling speeds when presetting and steady rolling and performing each thickness control based on that. CONSTITUTION:On a rolling preset for improving the on-gauge rate to the target thickness of rolled coil by applying a target load value corresponding to the target thickness value calculated by the predicting formula of rolling load and a cold rolling mill 1 for metallic materials performing the thickness control when steady rolling by determining a roll opening based on that target load value, a speed dependence is given to a formula predicting the coefficient of friction in the predicting formula of rolling load. From this matter, two kinds of predicted values of rolling loads corresponding to the rolling speed preset and corresponding to the rolling speed during steady rolling are calculated. Based on that, the thickness control at the time of the presetting of rolling and the steady rolling is performed. Therefore, each function of cold rolling is made highly accurate and the cold rolling products with good accuracy of sheet thickness can be stably manufactured. |
