1. The hardness of the aluminum plate.

The hardness of the aluminum plate is too high, and it is easy to crack. This requires the selection of good aluminum materials, which mainly depends on the brand and condition of the aluminum materials. Usually the comparison between 1 series, 3 series and 5 series is commonly used; the hardness of 6 series and 7 series is too high, and it is good to bend after annealing treatment to O state. There is also the quality of the aluminum plate. The imported material of the same type of aluminum plate is not easy to crack than the domestic material, but the quotation of the material is also a lot more expensive.

2. The thickness of the aluminum plate.

Too thick aluminum plate is not easy to bend, we understand it when we think about it, try to use thinner aluminum plate.

3. The size of the bending R angle.

The larger the bending R angle, the higher the success rate, so try to increase the bending R angle as much as possible.

4. The grain direction of the aluminum plate.

The bending direction should be straight with the grain direction of the aluminum plate, not parallel.

5. For the aluminum plate parts that need to be drawn, it is better to bend and then draw when the process allows, otherwise the probability of bending and cracking will increase.