During the aluminum foil rolling process, especially during reduced-pass production, a large amount of deformation heat and friction heat will be generated, making the rolling deformation zone always heated. If the local temperature of the roll in the deformation zone is too high. The maximum cooling capacity of the rolling cooling oil is exceeded, causing the thermal expansion at that location to become larger, and correspondingly the aluminum foil at the outlet becomes loose. For example, the aluminum foil cannot be flattened during the coiling process. Then the porosity of this area after coiling is larger than that of the flat area, and after accumulation, a bulge is formed, also called a hot bulge.
The specific measures for the aluminum foil hot drum problem are: timely adjust the roll crown according to the shape of the exit side during bottoming to ensure the quality of the bottoming and the shape control during normal rolling; the setting of the shape parameters must ensure the exit shape While flattening, ensure that the middle part is slightly tighter than the edge part, that is, maintain a certain middle height, and also consider the reasonable transition of plate shape parameters between passes; check the injection effect of the nozzle regularly, and stop the machine in time to check the working condition of the rolling oil nozzle.
