1. Material problem: There may be internal stress or impurities in the aluminum plate, which may lead to deformation after stamping.

2. Mold problem: The mold may have design defects or wear, resulting in uneven stress during stamping and deformation of aluminum plate.

3. Precautions: The precision and stability of the punch will also affect the stamping quality and the deformation of the aluminum plate.

4. Stamping process problem: Improper setting of stamping process parameters, such as too fast or too slow stamping speed, will affect the deformation of aluminum plate.