Press folding (folding) roller type is not accurate, such as calender bearing heating. The appearance of the air bubble ingot has a dirty east side, the heating time of the aluminum magnesium manganese plate is too long or the temperature is too high, and the appearance of the ingot is oxidized.

It makes the two ends of the roll swell, and the center of the plate pressed out is thick and the two sides are thin; when the plate is not pressed, it is easy to produce fold; the thickness difference between the two sides of the plate is large. Cracking from ingot end; ingot heating temperature too high or too low.

There is a certain deviation between the temperature and the apparent temperature in the international market. The interval between the thick materials is larger. When the pipe materials are combined with the small materials and the plate materials, they are in a frame. The holding time shall be appropriate to prevent under aging or over aging leading to insufficient hardness.

Too thick aluminum magnesium manganese plate is not easy to bend, everyone will think about it and try to use a thinner one. In the case of process permission, it is better to bend and then stretch, otherwise the bending fracture probability will increase.