1, stamping die. Adopting the die structure, the punch is pressed into the thin blank to make holes, and the size and shape can be controlled by the die. The advantage of stamping die is that the shape of holes is regular, and the position and spacing of holes can be controlled more accurately, which is suitable for mass production.

2. Laser cutting. Using laser cutting technology to directly cut thin blanks and make holes can make complex shapes and holes as needed, which has the advantages of saving time, money and high efficiency.