As an industrial raw material, aluminum foil is widely used in various sectors of the national economy. For the electronics industry, not only the demand for aluminum foil is increasing, but also higher requirements for the quality of aluminum foil.
Aluminum strips usually smaller than 0.2mm are called aluminum foils. The production of aluminum foil is a continuation of the cold-rolled strip process, and the main process characteristics seem to be very similar to cold-rolled strip steel. Because the aluminum foil is very thin, its mechanical properties are significantly reduced, and it is very sensitive to uneven deformation on the cross-section, and its impact on metal inherent defects such as hydrogen content and non-metallic inclusions becomes obvious.
In aluminum foil rolling, as the thickness of the rolled piece decreases, the influence of various process parameters on the rolling process gradually changes. Rolling roller gap and rolling pressure will gradually reduce or even lose the influence on the reduction in the rolling of ultra-thin aluminum foil. The influence of tension and rolling speed on the reduction is significantly increased, so that the adjustment of tension and speed becomes the main means to control the thickness and shape of the aluminum foil. The main reason for this change is that when the thickness of the rolled piece is reduced to less than about 0.1mm, the upper and lower working rollers are already pressed against each other when the rolling mill is running under no load, so that the roller joints are much larger than the rolled pieces. The flattening deformation of the thickness, under the extreme rolling conditions, further increasing the rolling pressure can only increase the flattening degree of the rolling roller, and has no effect on the reduction amount.
