The roll edge is a stamping process that rolls the edge of the process part close to the closed circle. The circular axis of the rim is straight.
The winding edge is a stamping process that rolls the upper edge of the hollow part close to the closed circle.
Drawing is a punching process that transforms a flat or process piece into a curved surface, which relies mainly on the extension of the material at the bottom of the convex die.
Bending is a stamping process which realizes bending deformation under the joint action of tension and bending moment, and makes the whole bending cross section be subjected to tensile stress.
Bulging is a punching process that expands the hollow or tubular parts radially outward. Slitting is a stamping process that divides the forming process into several parts.
Leveling is a stamping process to improve the flatness of part or whole planar parts.
is to rely on the extension of the material to form a partial sag or convex stamping process. The change of material thickness in undulating forming is not intentional, that is, the slight change of thickness is formed naturally in the process of deformation, not the requirement of design designation.