It is a characteristic of aluminum box rolling that the thickness deviation is difficult to control. The thickness difference of 3% is not difficult to control in the production of plate and strip, but it is more difficult to control in the production of aluminum foil.
As the thickness of the aluminum box becomes thinner, its micro-conditions can affect it, such as temperature, oil film, and oil and gas concentration. A roll of aluminum foil can be rolled up to hundreds of thousands of meters, and the rolling time is as long as about 10 hours, and the error of thickness measurement is easy to form with time.
The only way to adjust the thickness of aluminum foil is tension and speed.
These factors have caused difficulties in thickness control of aluminum foil rolling.
Therefore, to truly control the thickness difference of the aluminum box within 3%, many conditions are needed to ensure: use the aluminum foil blank of the qualified thickness; adjust and control the reduction and roll shape during rolling, and the roll is ground according to the specified parameters ; Stabilize the rolling process; frequently measure the thickness of the aluminum box during the rolling process, so as not to be undetected when the side thickness system fails.