Common Problems in the Production of Double Zero Aluminum Foil and Their Solutions

2017/8/28 18:02:06

Shape control

With the increase of the processing rate, the deformation heat in the deformation area increases abruptly, and the cooling capacity of the rolling oil is exceeded, which causes the local version to deteriorate, resulting in bad version. Since the change of the work roll type during the rolling process mainly comes from the temperature interference, the deformation heat generated by the rolled material is the main reason for the increase of the roll temperature. In order to obtain a good plate shape, it is necessary to give timely and effective The correction.

The original roll design can not be fully adapted to different specifications. The crown of the roll is not fully matched with the plate crown of the incoming plate, which is likely to cause a poor version. So it is important to warm the roll before the roll is rolled. But the traditional hot roller method is difficult to achieve the desired effect, and the hot roller for a long time, resulting in loss of yield, control production efficiency. Through the section of the way the cooling roll can be effectively resolved, that is, before the start of rolling should be based on work experience on the export version of the type of pre-judgment, such as wide aluminum foil rolling version of the easy to appear small edge tight loose loose loose, When the hot roller can correspond to the pre-rated version of the outlet, the rolling oil nozzle will be opened to control the flow rate control roller type, so that the roller type is close to the hot crown during rolling. This can effectively improve the quality of rendering and version type quality.

Rolling drums

Aluminum foil rolling process, especially in the production of subtraction will produce a lot of deformation heat and friction heat, so that the rolling deformation area is always in a heated state. If the local temperature of the roll in the deformation zone is too high. Beyond the maximum cooling capacity of the rolling cooling oil, so that the thermal expansion at the same place, then corresponding to the export of aluminum foil loose, such as in the aluminum foil coiling process can not be flattened. Then the coiling after the coiling of the larger than the flat, the accumulation of drums after the formation, also known as the hot drum.

Aluminum foil hot drums specific measures are: according to the export side of the plate shape when the timely adjustment of the roll crown to ensure the quality of the base and the normal rolling of the plate shape control; plate shape design must ensure that the export plate shape While ensuring that the central part of the central side of the slightly tight, that is to maintain a certain high, but also consider the road between the plate-shaped parameters of a reasonable transition; should regularly check the nozzle spray effect, timely stop check the work of rolling nozzle; general rolling oil preparation In accordance with the principle of high oil film strength, low viscosity and low oil spot tendency, the performance parameters of the rolling oil are strictly controlled in the preparation process. After replacing the roller or changing the backup roll, it must check the roller and the support roller Press the roller is normal, while adjusting the pressure of the roller; pay attention to observe the quality of the material surface; should be based on the nature of the material and the cooling capacity of the equipment reasonable allocation of a good pass rate. In the specific reasons are not clear before, in order to prevent the emergence of bulk waste, generally first use cooling, slow down the way to production.

Pinhole control

As the four rolling double aluminum foil reduction greatly increased, so the corresponding use of the rolling process parameters, the probability of pinholes will be greatly increased. Therefore, in addition to the quality of the blank need to ensure that the production process to pay special attention to the following aspects:

Four times the production of double zero aluminum foil, the rolling speed and the rear tension control should be combined with the roll surface roughness and rolling oil performance to adjust. Especially whether the previous pass of the finished product and the control of the finished pass and the control of the posterior tension are greatest for the pinhole. Practice proved that the rolling speed is too fast or too much after the number of pinholes increased significantly, the speed is too slow or too small after the tension and affect the production efficiency and even cause aluminum foil wrinkles, slits and so on. Therefore, to control the speed and tension, our process requires a normal rolling speed of not more than 600m / min, after the tension is not greater than 65N / mm2.

The higher the cleanliness of the rolled oil, the better the number of pinholes. Therefore, the rational allocation of diatomite and activated clay ratio, regular cleaning filter, and a person to manage, to ensure that the rolling of the filtration system must be good to run.

The surface roughness of the roll is particularly stringent. If the roll surface roughness is too high, the rolling speed is faster, the pinholes are increased and the surface brightness is low. To ensure the stability and quality, the pinholes are reduced. The roughness parameters of the process should be guaranteed.