| 摘要 |
<p>PURPOSE:To improve dimensional accuracy by controlling the gap of rolling rolls in accordance with the roll gap control functions taking the plastic coefft. of a rolling material set differently when its thickness is increasing or when decreasing and the elastic coefft. of a rolling mill into consideration. CONSTITUTION:When a roll gap is increased by DELTASi, thickness errors are determined by the equation I wherein DELTAS is a rolling roll gap, DELTAh is an increase in thickness, K is the rigidity coefft. of a rolling mill and M is the plastic coefft. of a rolling material. However, when the roll gap is decreasing, the equation II is used and when it is increasing, the equation III is used, thus both are corrected dividedly to obtain a roll gap control function which is set in a calculator 1. Next, based on the output of a detector 3 for the movement extent of rolling material and the above- described gap control function having been set, the calculator 1 calculates the roll gap and controls a screw down mechanism 6.</p> |
