| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To manufacture a cold-rolled steel strip having high accuracy of the width in high yield by calculating the variation of the width in continuous annealing by a numerical formula model and performing width control in the cold tandem rolling taking the variation into consideration even in a thick gage material the width variation of which is large in the continuous annealing. <P>SOLUTION: The numerical formula model by which the width on the outlet side of the final stand is expressed by taking rolling load at each stand, each interstand tension, the controlled variable of shape control means at each stand and the width of a base stock before rolling as variables is preliminarily prepared and also a numerical formula model by which the variation of the width in the continuous annealing is expressed by taking elongation percentage as a variable is also preliminarily prepared. By substituting the predicted value of the rolling load at each stand, the predicted value of each interstand tension, the measured value of the width of the base stock before rolling and the predicted value of the elongation percentage in the continuous annealing respectively in two above numerical formula models, the controlling variables of the shape control means in a plurality of stands among from the first stand to the stand in the next stage of this side of the final stand are set so that the width after the continuous annealing is made to coincide with the target value. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
