Control method for utilizing roller diameter difference to achieve automatic pressing zeroing of aluminum cold rolling mill

The invention relates to a control method for utilizing a roller diameter difference to achieve automatic pressing zeroing of an aluminum cold rolling mill. The method comprises the steps of determining given roller gap values by determining the parameters of contact rolling force and squeezin rolling force of roller systems and utilizing the roller diameter difference, wherein the given roller gap values are calculated by calculating the roller diameter difference of the new and old roller systems before roller replacement, and the two roller gap values including the initial roller gap valueand the secondary roller gap value are given by stages; conducting automatic pressing on the basis of the calculation parameters. By means of the method, the production efficiency and finished productratio of the rolling mill are increased, and the occurrence of product quality defects caused by pressing is avoided. 本发明涉及种利用辊径差实现铝冷轧机自动靠零的控制方法。该方法通过确定辊系接触轧制力和压靠轧制力参数，以及利用辊径差确定辊缝给定值：通过计算换辊前后新旧辊系辊径差的方式来计算辊缝给定值，并分阶段给定两次的辊缝值，即初