Stamping part is a process of applying external force to metal sheets through presses and dies to make them plastically deform or separate, thereby obtaining workpieces of the desired shape and size. Stamping parts usually use hot-rolled and cold-rolled steel plates, steel strips, etc. as raw materials. The stamping process is divided into hot stamping and cold stamping. Stamping parts are thin, uniform, light and strong, and are widely used in automobiles, electrical appliances, instruments, daily necessities and other fields.