The principle of processing stampings

Punch and die for stamping parts by applying external forces such as sheet, strip, pipe and profile, and make it produce plastic deformation or separation, to obtain the required shape and size of the workpiece forming method, the workpiece is stamping parts. Stamping is to rely on press and die for sheet, strip, pipe and profiles, such as external force, make its produce plastic deformation or separation, thus to obtain the required shape and size of the workpiece, Stamping parts) The forming method. Stamping and forging belong to plastic processing ( Or pressure processing) , called the forging press. Stamping of billet is mainly hot rolling and cold rolling 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 stamping processing. Instruments and meters, household appliances, bicycles, office machinery, household utensils, and other products, also have a large number of stamping parts. Compared with the castings, forgings, pressing with a thin, uniform, the characteristics of light and strong. Stamping can make other methods are difficult to manufacture with rib stiffener, flanging, ups and downs, or artifacts, in order to improve its stiffness. Because use precision mould, workpiece precision can reach micron grade, and repeat precision is high, the specification is consistent, can punch a hole nest, convex sets, etc. Cold stamping generally no longer by machining, or only need a small amount of machining. Hot stamping precision and surface state is lower than the cold stamping parts, but it's still better than the castings, forgings, cutting processing capacity. Stamping is efficient production methods, the use of compound die, especially the multi-station progressive die, it can be finished in a pressure on multichannel stamping process, realize the pick-up uncoiling, leveling, cutting to the forming and finishing of automatic production. High production efficiency, good working conditions, low production cost, general can produce hundreds of pieces per minute. Stamping process for mainly according to classification, can be divided into separation process and forming process two kinds big. Separation process is also called the blanking, and its purpose is to make from the sheet metal stamping parts along the contour line must be separated, and at the same time guarantee the quality requirements of the separation section. Forming process is designed to make sheet metal under the condition of not to break the billet occurred plastic deformation, made into the required shape and size of the workpiece. In the actual production, is often a variety of process integrated applied to an artifact. Cutting, bending, shear, deep drawing, bulging, spinning, correction is several main stamping process. Stamping with sheet metal surface and internal performance of stamping has great influence on the quality of the finished product, request stamping material thickness precision, uniform; Smooth surface, no spots, no scar, no scratch, no surface crack, etc. ; Yield strength evenly, no obvious directivity; High uniform elongation; Showed low; Low strain hardening. What are the characteristics of a stamping process? Sheet metal, mold and stamping equipment constitute the three essential elements of stamping processing. Stamping processing characteristics and the applications of the stamping production by mold and press finish machining process, compared with other processing method, has the following characteristics: (in terms of technology and economy 1) The size of the stamping parts from the mold to ensure accuracy, has the same characteristic, so the quality is stable, good interchangeability. ( 2) Due to the use of mould processing, so can obtain other processing methods can't or difficult to manufacture, wall thin, light weight, good rigidity, high surface quality, shape, complex parts. ( 3) Stamping processing, generally don't need to be heated blank, also don't like cutting, large cutting metal, so it is not only energy saving, and metal saving ( 4) For ordinary press can produce dozens per minute, and high speed press can produce hundreds of thousands of pieces per minute. So it is a kind of high efficient processing method. Due to the stamping process has the characteristics of the prominent, so various fields are widely used in national economy. For example, aerospace, machinery, electronic information, such as traffic, weapons, household appliances and light have stamping processing industry. Not only industry widely used, and each one comes in contact directly with the stamping products every day. Stamping can build clocks and instrument of small precision parts, also can make cars, tractors, large covering parts. Stamping materials can use ferrous metal, nonferrous metal and some nonmetal materials. Stamping shortcomings also exist some disadvantages, mainly displays in the stamping process of two kinds of noise, vibration hazards. These problems is not stamping process and die of itself, and is mainly due to the backward traditional stamping equipment. With the progress of science and technology, the two kinds of pollution will be solved.