2. Flanging: also known as hole drawing and hole turning, it is to pull a slightly larger hole from a smaller bottom hole and then tap it. It is mainly processed with thin metal sheet to increase strength and number of thread turns and avoid slipping teeth. It is generally used for shallow flanging with thin thickness and normal hole circumference, and the thickness is basically unchanged. When the thickness is allowed to be reduced by 30-40%, the flanging height can be higher than normal.
3. Stamping: This is a processing procedure formed by a die. Stamping processing generally includes punching, corner cutting, blanking, punching convex hull (bump), punching and tearing, punching and forming. Its processing needs corresponding dies to complete the operation, such as punching blanking die, convex die, tearing die, punching die, forming die and so on. , the operation mainly pays attention to the position and directionality.
4. Riveting: As far as our company is concerned, there are mainly riveting nuts, screws, etc., which are completed by hydraulic riveting machine or punching machine and riveted to sheet metal parts. There are also riveting methods, so we should pay attention to directionality.
5. Bending: Bending is to fold the 2D flat part into the D part. Its processing needs folding machine and corresponding bending die to complete, and there is also a certain bending sequence. Its principle is that the next knife folds first without interference, and folds after interference.