Modern stamping mold production is a large-scale continuous operation manufacturing method. Due to the participation and intervention of high-tech, the stamping production method has gradually evolved from initial manual operations to integrated manufacturing. The production process is gradually realizing mechanization and automation, and is developing towards intelligence and integration.

In actual production, when the production batch of stamping parts is large, the size is small, and the tolerance requirements are small, it is uneconomical or even difficult to achieve the requirements by using a dispersed single process for stamping. At this point, a centralized approach is often adopted in the process, which involves completing two or more single processes in one mold. The method of combination is different, and it can be divided into three combination methods: composite, progressive, and composite progressive.

Composite stamping - a combination method in which two or more different single processes are completed simultaneously on the same workstation of the mold in one working stroke of a press.

Progressive stamping - a combination of two or more different single processes at different stations of the same die in a certain sequence in a single working stroke of the press.

Composite progressive - a combination process that involves both composite and progressive methods on a pair of dies.

There are also many types of stamping die structures. Usually, according to the nature of the process, it can be divided into punching dies, bending dies, drawing dies, and forming dies, etc; According to the combination method of processes, it can be divided into single process molds, composite molds, and progressive molds. However, regardless of the type of stamping die, it can be seen as consisting of two parts: the upper die and the lower die. The upper die is fixed on the press workbench or pad, which is the fixed part of the stamping die. During operation, the blank is positioned on the lower mold surface through positioning parts, and the press slider drives the upper mold to press down. Under the action of the mold working parts (i.e. convex mold, concave mold), the blank undergoes separation or plastic deformation, thereby obtaining the required shape and size of the punch. When the upper mold picks up, the unloading and discharging device of the mold unloads or pushes the punched parts or waste materials from the convex and concave molds, in order to proceed with the next stamping cycle.