Stamping is to rely on press and die for sheet, strip, pipe and profiles, such as external force, make the onset of plastic deformation or separation, and then obtain the required shape and size of the workpiece forming way of (stamping). Stamping and casting belong to plastic processing (or pressure processing), called the forging press. Stamping blank first is hot rolled and cold rolled steel plate and steel belt.

Steel all over the world, there are 60 ~ 70% is plank, most of which is made by stamping products. Car body, chassis, fuel tank, radiator fin, the boiler steam drum, container shell, motor, electric iron core silicon steel sheet are stamping processing, etc. Instruments and meters, household appliances, bicycles, work of goods such as machinery, days vessel, also has a lot of stamping parts.

Compared with castings, forgings, metal stamping parts with a thin, uniform, the characteristics of light and strong. Stamping can make other way is difficult to make a rib stiffener, flanging, ups and downs, or artifacts, in order to progress its rigidity. Because choose fine mold, workpiece precision can reach micron grade, and high repeat precision, consistent standards, to stamping out the hole nest, convex sets, etc.

Cold stamping is usually no longer by machining, machining or needs only a few. Hot stamping precision and appearance condition is lower than the cold stamping parts, but it's still better than the castings, forgings, cutting processing capacity.

Stamping is efficient way to produce, choose compound die, especially the multi-station progressive die, can in a pressure on multichannel stamping process, end end by pick-up uncoiling, leveling, cutting to the forming and finishing of automatic production. High production efficiency, good working conditions, to produce low capital, often can produce hundreds of pieces per minute.

Stamping first are classified according to the skills, can be divided into separation process and forming process two kinds big. Separation process is also called the blanking, the intention is made from the sheet metal stamping along must contour separation, together to ensure that the quality requirements of the separation section. Forming process of the intention is to make the sheet metal plastic deformation under the condition of not broken slab attack, made into the required shape and dimensions of the workpiece. In the practice produces, is often a variety of process integrated applied to an artifact. Cutting, winding, shearing, deep drawing, bulging, spinning, correction is the first of several stamping skills.

Stamping sheet appearance and internal functions to influence the quality of stamping products, demand for stamping data accurate, uniform thickness; Appearance is bright and clean, no spots, no scar, no scratch, no crack appearance, etc; Uniform bending strength, no significant direction; High uniform elongation; Showed low; Low strain hardening.

In practice production, commonly used approximate experimental skills and stamping process, such as the functions of deep drawing experiments, bulging experiment inspection data such as stamping function, in order to ensure the product quality and high qualified rate.

The precision of the mould and structure directly affect the forming of stamping parts and precision. Mould making money and life spans are important factors affecting the quality of capital and pressing. Mold design and production needs more time, it will extend the new fruit of stamping parts preparation time.

Mold base, the standardization of die set, guide and carry out simple mold (for small batch production), compound die, multi-station progressive die (for many) products, as well as the development of quick die change equipment, can reduce workload and shorten the preparation time, stamping production preparation can make suitable for stamping production cuts preparation work and shorten the preparation time, can make the suitable for mass production of leading stamping skills properly applied to produce small batch variety.

Stamping equipment in addition to the thick plate with hydraulic press forming, usually choose mechanical press. In modern high-speed transfer mechanical press is middle, collecting, transporting equipment uncoiling, leveling, products such as machinery and tooling libraries and quick die change equipment, and use the computer program control, may constitute a higher production rate of automatic stamping production line.

In every minute of the day produces dozens, hundreds of stamping parts, inside short time feeding, stamping, the end pieces, discharge waste process, such as personal, equipment and quality accidents often attack. Therefore, safety produce of stamping is a very important question.