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The Working Principle of Stamping Tools

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 manual operation in the early stage to integrated manufacturing. The production process is gradually realizing mechanization, automation, and is developing towards intelligence and integration.  

In actual production, when the production batch of stamped parts is large, the size is small, and the tolerance requirements are small, it is uneconomical or even difficult to meet the requirements by using a dispersed single process for stamping. At this time, a centralized approach is often adopted in the process, which involves combining two or more single processes in a single mold, known as the combination method. It can also 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 simultaneously completed at the same station of the mold in one working stroke of the 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 includes both composite and progressive methods on a single die.

There are also many types of structures for stamping dies. Usually, according to the nature of the process, it can be divided into punching dies, bending dies, deep drawing dies, and forming dies; According to the combination of processes, it can be divided into single process molds, composite molds, and progressive dies. However, regardless of the type of die, it can be seen as consisting of an upper die and a lower die. The upper die is fixed on the press worktable or pad and is the fixed part of the die. During operation, the billet is positioned on the lower die surface by locating the parts, and the press slide drives the upper die to press down. Under the action of the working parts (i.e. convex and concave dies) of the mold, the billet separates or undergoes plastic deformation, thereby obtaining the required shape and size of the punch. When the upper mold is raised, the unloading and discharging device of the mold will unload or push out the punch or waste from the convex and concave molds for the next stamping cycle.