Stamping parts rely on press and die to impose external force on plate, strip, pipe and profile, so as to produce plastic deformation or separation, so as to obtain the required shape and size of the workpiece (stamping parts) forming processing method. Stamping and forging belong to plastic processing (or pressure processing), collectively known as forging. The blanks for stamping are mainly hot and cold rolled steel plates and strips.

Of the world's steel, 60 to 70 percent is sheet metal, most of which is stamped into finished products. Automobile body, chassis, fuel tank, radiator sheet, boiler drum, container shell, motor, electrical core silicon steel sheet and so on are stamping processing. Instruments, household appliances, bicycles, office machinery, utensils and other products, there are also a large number of stamping parts.

Compared with castings and forgings, stamping parts have the characteristics of thin, uniform, light and strong. The workpiece with reinforcing ribs, ribs, undulation or flanging, which is difficult to make by other methods, can be produced by stamping to improve its rigidity. Due to the use of precision mold, workpiece accuracy can reach micron level, and high repetition accuracy, consistent specifications, can be stamped out of the hole, boss, etc.

Cold stamping parts are generally not cut, or only require a small amount of cutting. The precision and surface state of hot stamping parts is lower than that of cold stamping parts, but it is still better than castings and forgings, and the cutting amount is less.

Stamping is an efficient production method. The composite die, especially the multi-station progressive die, can complete multiple stamping processes on a press, and realize the automatic production from unwinding, leveling, blanking to forming and finishing. High production efficiency, good working conditions, low production costs, generally can produce hundreds of pieces per minute.

Stamping is mainly classified according to the process, can be divided into two categories: separation process and forming process. The separation process is also called blanking. Its purpose is to separate the stamping parts from the sheet material along a certain contour line and ensure the quality requirements of the separation section. The surface and internal properties of the stamping sheet have great influence on the quality of the stamping product, which requires accurate and uniform thickness of the stamping material. Smooth surface, no spot, no scar, no abrasion, no surface crack, etc. The yield strength is uniform and has no obvious direction. High uniform elongation; Low yield ratio; Low work hardening.

Stamping parts are mainly made of metal or non-metal sheet material, with the help of the pressure of the press, and processed by the stamping die. It mainly has the following characteristics:
The stamping parts are produced by stamping under the premise of little material consumption. The parts are light in weight and good in stiffness. After plastic deformation of sheet metal, the internal structure of the metal is improved, so that the strength of the stamping parts is improved.
The stamping parts have higher dimensional accuracy, uniform size with the module, has better interchangeability. General assembly and use requirements can be met without further machining.

(3) Stamping parts in the stamping process, because the surface of the material is not damaged, it has a better surface quality, smooth appearance, which provides convenient conditions for the surface spray painting, electroplating, phosphating and other surface treatment.