Stamping is a processing method which is mainly a blank sheet, strip, pipes and other profiles, by the action of the device using the mold punch, so to obtain the desired shape and size part. Stamping is a processing method primarily blank a sheet, strip, tubing and other profiles, stamping equipment through the use of the role of the mold, and thus obtain the desired part shape and size.

Materials, tooling and equipment are the three elements of the press.

Stamping request was processed material with high ductility and toughness, low yield ratio and time-sensitive, generally require carbon steel elongation δ ≥ 16%, ≤ 70% yield ratio σs / σb, low-alloy high strength steel δ ≥ 14%, σs / σb ≤ 80%. Otherwise, poor performance stamping, certain measures must be taken to the process, thereby increasing the manufacturing cost of the parts.

Stamping mold is the main process equipment. A lot of stamping surface quality, dimensional tolerances, productivity and economic benefits of the mold structure and rational design. According to combinations of the stamping process are: a simple single-step mode, multi-mode continuous processes and composite mold.

Stamping equipment mainly mechanical and hydraulic presses. In mass production, we should try to use high-speed multi-station presses, automatic presses; in small batch production, especially large plate stamping production, the use of hydraulic machines.

By applying a force to the punch and die plates, strips, tubes and profiles, etc., so that the plastic deformation or separation, shaping methods to obtain the shape and size of the work required to get the workpiece is stampings.

Stamping presses and dies is by applying for sheet, strip, tube and profiles and other external forces, so that the plastic deformation or separation, to obtain the desired shape and size of the workpiece (stamping) forming processing methods. Stamping and forging belong plastic processing (or pressure processing), collectively known as forging. Stamping blanks are mainly hot-rolled and cold rolled steel sheet and strip.

Steel worldwide, 60 to 70% of the plate, most of which are made through stamping products. The car body, chassis, fuel tank, radiator, boiler drum, container housing, electrical, electronics, etc. are stamping silicon steel core processing. Instrumentation, home appliances, bicycles, office machinery, utensils and other products in life, there are a lot of stampings.

Compared with stampings castings, forgings, with a thin, uniform, light and strong features. Punching the workpiece can be made with ribs, ribs, undulating or otherwise difficult to manufacture the flange to increase its rigidity. As a result of precision molds, precision parts up to the micron level, and high repeat accuracy, consistency specifications, you can punch out holes nest, bosses, and so on.

Cold stamping generally no longer after cutting, or need only a small amount of cutting. Hot stamping accuracy and surface state below the cold stamping, but still better than castings, forgings, machining less.

Stamping is a highly efficient production methods, the use of composite mold, especially the multi-position progressive die stamping process to be completed multi-channel on a press, implemented by strip uncoiling, leveling, blanking the shaping, finishing the whole automatic production. High production efficiency, good working conditions, low production costs, general produce hundreds per minute.

Stamping is mainly classified according to the process, the separation process can be divided into two categories, and forming processes. Said separation step is punching, stamping its purpose is to separate from the sheet along a contour line, while maintaining the quality requirements of the separation section. The purpose of the plate forming step the material is plastically deformed without breaking the blank condition, the shape and dimensions of the workpiece into the desired. In actual production, is often used in a variety of processes integrated workpiece. Punching, bending, shearing, deep drawing, bulging, spinning, several major correction is stamping process.

Intrinsic properties of the surface and the sheet metal stamping stamping impact on the quality of the finished product is large, requires precision stamping material thickness, uniformity; smooth surface, no spots, no scars, no bruises, no surface cracks; uniform yield strength, no significant directional; uniform elongation; yield ratio is low; hardening low.

In actual production, commonly used approximation process with the stamping process tests, such as deep drawing press performance performance tests, performance tests, such as bulging test materials to ensure product quality and high yield.