[China Aluminum Network] In the production of double-leaf foils, the rolling of aluminum foil is divided into three processes: rough rolling, medium rolling, and finish rolling. From the process point of view, it can be roughly divided from the thickness of the rolling outlet. The sub-method is that the exit thickness is greater than or equal to 0.05 mm for rough rolling, the exit thickness is between 0.013 and 0.05 for intermediate rolling, the exit thickness is less than 0.013 mm for single-sheet finished products and double-rolled finished products are for finish rolling. The rolling characteristics of rough rolling and aluminum strip are similar. The thickness control mainly depends on the rolling force and the back tension. The thickness of rough rolling is very small. Its rolling characteristics are totally different from those of aluminum strip rolling, and it has aluminum foil rolling. The characteristics of the special features are mainly in the following aspects: (1) Aluminum strip rolling. To make the aluminum strip thin mainly depends on the rolling force, so the automatic control of the thickness is based on the control method of the constant roll gap AGC main body. Even if the rolling force changes, the roll gap can be adjusted at any time to maintain a certain value of the roll gap can also obtain the thickness Consistent sheet strip. The aluminum foil is rolled to the intermediate finish rolling. Because the thickness of the aluminum foil is extremely thin, the rolling force is increased during rolling, so that the elastic deformation of the roll is easier to generate than the plastic deformation of the material being rolled. The elasticity of the roll cannot be suppressed. Neglected, the roll squashing of the roll determines that the rolling force does not achieve the same effect as in the case of plate rolling in aluminum foil rolling. The aluminum foil rolling is generally a rollless rolling under constant pressure conditions, adjusting the thickness of the aluminum foil. Mainly rely on the adjustment of tension and rolling speed. (2) Rolling. For ultra-thin aluminum foil with a thickness of less than 0.012mm (thickness is related to the diameter of the work roll), due to the elastic flattening of the roll, the method of single sheet rolling is very difficult, so the method of double-combined rolling is adopted. Lubricating oil is added between two aluminum foils and then rolled together (also called roll-to-roll). Roll-rolling not only can roll out ultra-thin aluminum foil that can't be produced by single-sheet rolling, but also can reduce the number of broken belts and improve labor productivity. With this process, a single-sided light aluminum foil of 0.006 mm to 0.03 mm can be produced in batches. (3) Speed ​​effect. During the aluminum foil rolling process, the thickness of the foil thickness decreases with the increase of the rolling degree, which is called the speed effect. The explanation of the speed effect mechanism needs to be further studied. The reason for the speed effect is generally considered to have the following three aspects: 1) The frictional state between the work roll and the rolled material changes, and as the rolling speed increases, the amount of lubricating oil brought in increases, thereby changing the lubrication state between the roll and the rolled material. The friction coefficient decreases, the oil film becomes thicker, and the thickness of the aluminum foil decreases. 2) Changes in the mill itself. In a rolling mill with a cylindrical bearing, as the rolling speed increases, the roll neck floats in the bearing, so that two rolls interacting with each other will move in the direction of mutual abutment. 3) Processing softens when material is rolled and deformed. The rolling speed of the high speed aluminum foil rolling mill is very high. With the increase of the rolling speed, the temperature of the rolling deformation zone is high. According to the calculation, the metal temperature in the deformation zone can rise to 200°C, which is equivalent to performing an intermediate recovery annealing, thus causing Rolled material processing softening phenomenon.