Compared with castings and forgings, stampings are thin, uniform, light and strong. Stamping can produce workpieces with stiffeners, ribs, undulations, or flanging that are otherwise difficult to manufacture to increase their rigidity. Due to the use of precision molds, the accuracy of the workpiece can reach micrometers, and the repeat accuracy and specification are consistent. Hole nests and bosses can be punched out. Cold stampings are generally no longer cut, or require only a small amount of cutting. The accuracy and surface condition of hot stamping parts are lower than those of cold stamping parts, but they are still better than castings and forgings, and the amount of machining is small.
Stamping is an efficient production method. Using compound molds, especially multi-position progressive molds, it is possible to complete multiple stamping processes on one press (single station or multi-station) to achieve unwinding and straightening with strips. Flat, blanking, automatic production of forming and finishing. With high production efficiency, good working conditions and low production costs, it can produce hundreds of pieces per minute. Compared with other methods of mechanical processing and plastic processing, stamping has many unique advantages both technically and economically. The main performance is as follows.
(1) The stamping process has high production efficiency, convenient operation and easy realization of mechanization and automation. This is because stamping is accomplished by means of die and punching equipment. The number of strokes of ordinary presses can reach several tens of times per minute, high-speed pressures can reach hundreds or even thousands of times per minute, and each press stroke is You may get a punch.
(2) Since the die guarantees the size and shape accuracy of the stamping part during stamping, and generally does not destroy the surface quality of the stamping part, the life of the die is generally longer, so the stamping quality is stable, the interchangeability is good, and it has “the same” Characteristics.
(3) Stamping can process parts with a wide range of sizes and shapes, such as stopwatches as small as clocks, as large as automobile longitudinal beams, coverings, etc., plus the cold deformation hardening effect of materials during stamping, the strength of stamping and The stiffness is high.
(4) Stamping generally does not generate scraps, material consumption is less, and no other heating equipment is required. Therefore, it is a saving material and energy-saving processing method, and the cost of stamping parts is low.
Due to the superiority of stamping, stamping processing has a wide range of applications in various fields of the national economy. For example, there are stamping and processing in aerospace, aviation, military, machinery, agricultural machinery, electronics, information, railways, post and telecommunications, transportation, chemicals, medical equipment, household appliances and light industry. Not only is it used by the entire industry, but everyone has direct contact with stamping products. There are many large, medium and small stampings on airplanes, trains, cars and tractors. The car body, frame and rim are all stamped out. According to relevant survey statistics, 80% of bicycles, sewing machines and watches are stamping parts; 90% of televisions, tape recorders and cameras are stamping parts; there are food metal shells, steel refining boilers, enamel bowls and stainless steel cutlery. All are stamping products using molds; even the hardware of the computer lacks stamping parts.