The difference between metal stamping parts and casting


Stamping mainly by technology classification, separation process can be divided into two categories and the forming process. Separation step, also known as punching, stamping its purpose is to separate from the sheet along a certain contour, while ensuring the quality of the separation section. Stamping is a highly efficient method of producing composite mold, especially multi-position progressive die, multi-channel stamping process can be completed on a single press, achieved by unwinding the strip, flattening, punching to the forming, finishing Full automated production. High production efficiency, good working conditions, low production costs, generally produce hundreds per minute. The purpose is to make the forming process of sheet plastic deformation without breaking the blank condition, shape and size of the workpiece into the desired. In actual production, it is often used in a variety of processes integrated workpiece. Punching, bending, shearing, deep drawing, bulging, spinning, several major correction is punching.
Metal casting is molded by various objects obtained by casting method, that is a good liquid metal smelting, with casting, injection, inhalation or other method of injection molding a pre-prepared mold after it has cooled by the falling sand, and clean up after processing, obtained with a certain shape, size and properties of objects.
The difference between casting and metal stamping parts: a thin, uniform, light, strong features stamped workpiece can be made with ribs, ribs, undulating or flanging otherwise difficult to manufacture, to increase its rigidity. As a result of precision molds, precision parts up to micron level, and the difference between heavy stampings and castings: a thin, uniform, light, strong characteristic stamping can be prepared by other methods turned out difficult to manufacture with ribs, ribs, undulations or the edge of the workpiece, to improve its rigidity. As a result of precision molds, precision parts up to micron level, and high repeatability and consistent specifications may be stamped out of the nest holes, bosses and so on.
Hardness testing stamping
Metal stamping parts hardness testing Rockwell hardness. Small, stampings having a complicated shape can be used to test the plane is small, it can not be detected on a normal desktop Rockwell hardness.
Hardness testing of castings
Casting itself attributes directly affect the quality of the processing, in which the hardness value is to determine the casting process is an important indicator.
1, Brinell hardness: mainly used to determine the hardness of castings, forgings, non-ferrous metal parts, hot-rolled billets and annealed pieces, measuring range ≯HB450.
2, Rockwell hardness: HRA mainly used for high hardness specimens, measured higher than HRC67 hardness and surface hardness than the material, such as carbide, nitride steel, measuring range HRA> 70. HRC is mainly used for steel parts (such as carbon steel, tool steel, alloy steel, etc.) after quenching or tempering hardness measurement, measurement range HRC20 ~ 67.
3, Vickers hardness: thin pieces and used to determine the hardness of steel parts, can also be used to determine the carburizing, cyanide, nitriding surface hardening parts hardness.

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