Introduction To Stamping Parts

60~70% of the steel in the world is sheet steel, most of which are finished products after stamping. The car body, chassis, oil tank, radiator, boiler drum, container shell, motor, electrical core silicon steel sheet, etc. are all processed by stamping. There are also a large number of stamping parts in instruments, household appliances, bicycles, office machinery, household utensils and other products.
Compared with castings and forgings, stamping parts are thin, uniform, light and strong. Stamping can produce workpieces with stiffeners, ribs, undulations or flanging that are difficult to manufacture by other methods to improve their rigidity. Due to the use of precision molds, the precision of the workpiece can reach the micron level, and the repetition accuracy is high, and the specifications are consistent, and the holes and bosses can be punched.
Generally, cold stamping parts are no longer cut, or only need a small amount of cutting. The precision and surface state of hot stamping parts are lower than those of cold stamping parts, but still better than castings and forgings, with less machining.
Stamping is an efficient production method. The use of compound dies, especially multi-station progressive dies, can complete multiple stamping processes on a press, and realize full automatic production from uncoiling, leveling, blanking to forming and finishing. High production efficiency, good working conditions, low production cost, generally hundreds of pieces per minute.
Stamping is mainly classified according to process, which can be divided into two categories: separation process and forming process. The separation process is also called blanking. Its purpose is to separate the stampings from the sheet along a certain contour line, while ensuring the quality requirements of the separated section. The surface and internal properties of the sheet metal used for stamping have a great impact on the quality of the finished stamping product. The thickness of the stamping material is required to be accurate and uniform; The surface shall be smooth and clean, without spots, scars, scratches, surface cracks, etc; The yield strength is uniform without obvious directionality; High uniform elongation; Low yield strength ratio; Low work hardening.