(1)Aluminum strip rolling. To make the aluminum strip thin mainly depends on the rolling force, so the automatic control mode of plate thickness is constant roll gap as the main body of AGC control mode, even if the rolling force changes, adjust the roll gap at any time to maintain a certain value can get the same thickness of the plate and strip. And because to finishing of rolling aluminum foil, aluminum foil thickness is very thin, rolling, rolling force, make the rolls elastic deformation is easier than being rolled material to produce plastic deformation, the elastic flattening of roll can't be ignored, roll play flattening determines the aluminum foil rolling, the rolling force is not like the mill, aluminum foil rolling is generally under the condition of constant pressure without rolling, roll gap adjustment relies mainly on the aluminum foil thickness after tension and rolling speed.
(3) velocity effect. In the process of 3003 aluminum foil rolling, the thinning of foil thickness with the rise of rolling system is called velocity effect. The explanation of the mechanism of velocity effect still needs to be further studied. The reasons for the velocity effect are generally considered as follows:1) the friction state between the working roller and the rolling material changes. With the increase of rolling speed, the amount of lubricating oil is increased, so that the lubrication state between the roller and the rolling material changes. The friction coefficient decreases, the oil film thickens, and the thickness of aluminum foil decreases accordingly.2) changes of the rolling mill itself. In rolling mills with cylindrical bearings, the necks float in the bearings as the rolling speed increases, so that the two interacting rollers move closer to each other.3) processing softening of materials when they are deformed by rolling. The rolling speed of high speed aluminum foil rolling mill is very high, with the increase of rolling speed, the temperature of rolling deformation zone opens up, it is calculated that the temperature of metal in the deformation zone can rise to 200℃, which is equivalent to an intermediate recovery annealing, so the phenomenon of processing softening of rolled materials is caused.
