| 摘要 |
<p>PURPOSE:To control a shape so that a crown strip metal in which its thickness reduces gradually from one side end of the strip width toward the other end can be rolled into a specified cross section shape from the start of rolling to the termination. CONSTITUTION:The controlled variable of two arbitrary controlled items of a group of asymmetrical shape controlled items composed of a bending force difference between work rolls 1, a bending force difference between intermediate rolls 2, a rolling force difference between backup rolls 3, a shift position difference between upper and lower intermediate rolls on operating and driving sides of a multistage (exceeding sixfold) rolling mill is set by a control expression, the controlled variable of two arbitrary controlled items of a group of symmetrical shape controlled items composed of an average bending force of the work rolls 1, an average bending force of the intermediate rolls 2, an average shift position of the intermediate rolls on the operating and driving sides is set by a control expression and rolling is started by performing a setup control and after the start of the rolling, each controlled variable is always corrected to be rolled with regard to the variable of tension generated in the direction of the strip width at the time of winding after the start of the rolling.</p> |
