Double zero aluminum foil production process control

2017/8/22 14:34:06

Production process control

Processing rate

The original aluminum foil rolling pass processing rate is generally controlled at 50% to 60%, after the reduction of aluminum foil processing speed is generally more than 60%. The distribution of rolling reductions is gradually increased by the rate of processing. After the reduction of the ratio of the original rolling processing rate as shown in Table 2, Table 3.

Selection of rolling process parameters

Rolling force: for the thickness of 0.05mm or more foil can play a major role in the reduction, due to reduction in the production of a larger amount of pressure, in order to ensure that other process parameters balance, so the use of rolling force is also larger.

Rolling speed: Rolling speed is the main sign of the advanced degree of rolling mill and rolling technology. The development direction of aluminum foil mill is high speed rolling to obtain high productivity, but when the production is reduced, the first two are absolutely depressed Large amount of deformation heat and friction heat larger, if the rolling speed is too easy to produce drums.

After the tension: after the tension should be controlled less, to avoid the destruction of the internal organization of aluminum foil, is conducive to the reduction of pinholes.

Rolling oil temperature: In order to ensure the cooling capacity of rolling oil, control the good version, to prevent rolling drum to control the rolling oil temperature.

Plate type curve: the rolling process I value, especially the first four pass I value set with the control, not only by the impact of billet, and if the shape control is not good, will lead directly in the finished road rolling process Wrinkling, from the edge and so on. The specific program is shown in Table 4 below.

Selection and management of rolling oil

In the foil rolling, rolling oil in addition to the cooling, lubrication, the compression of the foil rolling pressure reduction has a great impact in the general case of good resistance to lubricating oil, Road processing rate is large, otherwise the road processing rate will be reduced.

The factory rough, finishing the same time using a low viscosity base oil MOA-80, by adjusting the content of additives to meet the rough, finishing different process requirements. This is easier to manage from rolling oil. The selected base oil index is shown in Table 5.

Rolling oil additives are mainly used in the ester, alcohol add a small amount of acid, so that the best effect of rolling oil. Due to four times out of double-finished products used by the greater pressure reduction, so the additive content of five times higher than the rolling content. The amount of alcohol added is usually 2% to 5% of the base oil, and the amount of the ester is 1% to 3% of the base oil. When the ester content is too low, then the rolling will occur when the phenomenon of pressure; and too high after the easy to produce oil spots. Specific use of rolling oil indicators in Table 6.

Roll management

Roller is an important part of the rolling process, roll quality stability is the basis of rolling stability. The main process parameters are the crown of the roll and the control of the surface roughness. The grinding process of the roll is shown in Table 7.

Intermediate annealing

The intermediate annealing is mainly to eliminate the work hardening. Hot rolled aluminum foil blank from 750μ rolling to 15μ, the total processing rate has reached 98%, tensile strength of about 180MPa or so. Thus, in the finished rolling process, the thinning is relatively difficult and frequent slippage occurs.

Another major task of intermediate annealing is to reduce the pinholes of the finished product. The empirical data show that the hot-rolled billet is rolled with double-zero aluminum foil, and after intermediate annealing the needle is doubled.

So the middle annealing is generally arranged before the finished pass, so that the mechanical properties of aluminum foil from 160MPa ~ 180MPa down to 120MPa ~ 140MPa. Because the choice of the thickness of the blank is different, the four passes are slightly lower than the total processing rate of the five passes, and the high temperature of the deformation zone in the four pass production reduces the degree of hardening of the aluminum foil, so the intermediate annealing temperature is lower than that of the five Sub-production is slightly lower.

Intermediate annealing process: 165 ℃ x8 ~ 18h.