In the actual production, the process test of the common and stamping process is usually used, such as drawing performance test, bulging performance test and so on to guarantee the finished product quality and the high qualified rate..
Stamping is by press and die of sheet, strip, pipe and profiles such as external force is applied to produce plastic deformation or separation, so as to obtain the required shape and size of the workpiece (Stamping) of the forming process. Stamping and forging are plastic processing (or pressure processing), collectively known as forging. The main blank of the stamping is hot rolled and cold rolled steel and steel strip.
Compared with castings and forgings, stamping parts have the characteristics of thin, uniform, light and strong.. Stamping can be produced from other methods is difficult to manufacture with ribs, rib, rolling or burring of the workpiece, to enhance its rigidity. Due to the use of precision molds, workpiece accuracy can reach micron level, and the same high accuracy, specifications, you can punch out hole nest, convex table, etc..
Cold stamping parts are generally no longer cutting, or need only a small amount of cutting. The accuracy and the surface state of the hot stamping parts are lower than the cold pressing parts, but still better than the castings, forgings, and cutting process quantities.
Stamping is efficient production methods, using composite mold, especially multi position progressive die, in a press finish a plurality of stamping process, achieved by belt uncoiling, leveling, blanking to the forming, fine whole automatic production. High production efficiency, good labor conditions, low production cost, generally per minute can produce hundreds of pieces.
According to process classification, it can be divided into two categories: separation process and forming process.. The separation procedure is also called blanking, which is designed to separate the stamping parts from the sheet material along a certain contour, while ensuring the quality of the separation section. The purpose of the forming process is to make the sheet material in the condition of the non – breaking plastic deformation, the workpiece required for the shape and size. In the actual production, it is often used in a variety of processes for a workpiece. Cutting, bending, cutting, deep drawing, bulging, spinning and straightening are several main punching processes..
Stamping sheet metal surface and internal performance of stamping products affect the quality of a great stamping materials accurate uniform thickness; surface clean, no spots, no scar, no scratches, no surface crack etc.; yield strength uniform, no obvious directionality; high uniform elongation; yield ratio is low; work hardening.
Press equipment in addition to the use of heavy plate water press, the general use of mechanical presses. In modern high-speed multi station mechanical press as the center, configuration uncoiling, leveling and finished product collection and transportation machinery and mold base and quick change mold device, and the computer program control, composed of high productivity of the automatic stamping production line.