![]() The holes also may serve as clearances for gas springs and other die components. The lower die shoe often has machined or flame-cut holes that allow slugs and scrap created in the die to fall freely through the die shoe onto the press bed. The upper and lower die shoes assembled together with guide pins create the die set. Aluminum also is a great metal for shock adsorption, which makes it a good choice for blanking dies. ![]() Aluminum is one-third the weight of steel, it can be machined very quickly, and special alloys can be added to it to give it greater compressive strength than low-carbon steel. Aluminum also is a popular die shoe material. Although grinding is the most popular, a milled surface now can be obtained that is as accurate as a ground surface. These parts must be machined-milled or ground-so that they are parallel and flat within a critical tolerance. They serve as the foundation for mounting the working die components. Image courtesy of Eclipse Tool and Die.ĭie plates, shoes, and die sets are steel or aluminum plates that correspond to the size of the die (see introductory photo and Figure 1). Dies also need stripper, pressure, and drawing pads, as well as the devices used to secure them: spools, shoulder bolts, keepers, and retainers, as well as gas, coil, or urethane springs.įigure 1 Die plates, shoes, and die sets, which correspond to the size of the die, serve as the foundation for mounting the working die components. Most stamping dies are constructed of several basic components, including die plates, shoes, die sets, guide pins, bushings, heel blocks, heel plates, screws, dowels, and keys. Dies also can contain cutting and forming sections made from carbide or various other hard, wear-resistant materials. The die's cutting and forming sections typically are made from special types of hardenable steel called tool steel. Editor's Note: This article is edited from Part IV and Part V of an article series on covering stamping die fundamentals and focusing on the components used in manufacturing stamping dies.Ī stamping die is a special, one-of-a-kind precision tool that cuts and forms sheet metal into a desired shape or profile.
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