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Stamping Die / Stamping Mould


Stamping die are tools used to produce high volume sheet metal parts. These parts achieve their shape through the effects of the stamping die tooling. It is a special, one-of -a- kind precision tool that cuts and forms sheet metal into a desired shape or profile. A special type of hardenable steel called tool steel is used to make the die's cutting and forming sections. Carbide and various other hard, wear-resistant materials are also used to make die's cutting and forming sections. Several Stamping mould basic components, including die plates, shoes, die sets, guide pins, bushings, heel blocks, heel plates, screws, dowels and keys are used to construct stamping die. Dies also need stripper, pressure, Stamping mould 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.

Formability-(the primary attribute of sheet metal material), is defined as the materials ability to be bent, stretched and drawn. The metallurgical term for these qualities is 'ductility'. Ductility is the materials ability to deform and elongate without fracture. The extent to which a stamping die is subjected to such deformation is directly related to the part's overall shape and geometry. The die design, the press, press speed, lubrication are some of the factors that influence the material's formability.

The word 'die' is a generic term used to describe the tooling used to produce stamped parts in Stamping mould. A die set assembly consisting of a male and female component is the actual tool that produces the shaped stamping die. The male and female components work in opposition to both form and punch holes in the stock. The upper half of the stamping die set, which may be either the male or female, is mounted on the press ram and delivers the stroke action. The lower half is attached to an intermediate bolster plate which in turn is secured to the press bed. Guide pins are used to ensure alignment between the upper and lower halves of the die set.

  • Die Plates, Shoes, and Die Sets: They correspond to the size of the die and serve as the foundation for mounting the working die components. These parts must be machined—milled or ground—so that they are parallel and flat within a critical tolerance. Although grinding is the most popular, a milled surface now can be obtained that is as accurate as a ground surface.
  • Guide Pins and Bushings: They align the upper and lower die shoes precisely. These pins have several advantages. First, friction is reduced so the die can run at faster speeds without generating excessive friction and heat. Second, they allow the die maker to separate the upper and lower die shoes easily. Third, because they use ball bearings, they can be manufactured with greater accuracy than friction pins.
  • Heel Blocks and Heel Plates: Heel blocks are special steel blocks connected to the upper and lower die shoes to absorb any side thrust that may be generated during the cutting and forming processes.
  • Screws, Dowels and Keys: Screws fasten and secure the working components to both the upper and lower die shoes. Dowels are hardened, precision-ground pins that precisely locate the die section or component in its proper location on the die shoe. Keys are small, rectangular blocks of precision –ground steel that are inserted into milled pockets in the die shoes and sections called keyways.
  • Pads: A pad is simply a pressure-loaded plate, either flat or contoured, that holds, controls, or strips the metal during the cutting and forming processes.
  • Spools, shoulder bolts, and keepers: They are used to fasten pads to the die shoes while allowing them to move up and down.

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