Stamping process classification
Deep drawing: drawing is also called drawing or rolling. It is the punching process of hollow parts made of flat blank made by blanking. The drawing process can be used to make cylindrical, stepped, tapered, spherical, box shaped and other irregularly shaped thin-walled parts. In addition to other stamping processes, parts with extremely complex shapes can be made. In stamping production, there are many kinds of drawing parts. Because of its different geometry characteristics, the location of deformation zone, the nature of deformation, the distribution of deformation and the stress state and distribution law of each part of the blank have considerable or even essential differences. Therefore, the process parameters, the number of processes and the order of determination methods and die design principles and methods are not the same. According to the characteristics of deformation mechanics, all kinds of drawing parts can be divided into four types: straight wall revolving body (cylindrical part), straight wall non rotating body (box shape), curved surface revolving body (curved surface shape part) and curved surface non revolving body.
Is a kind of basic stamping process mould separation material, which can be directly made of flat parts or other stamping processes such as bending, drawing and forming are blank, also can be in the stamping forming has been carried on the incision, trimming etc.. Blanking is widely used in automotive, household appliances, electronics, instruments, meters, machinery, railways, communications, chemicals, light industry, textiles and aerospace industries. Blanking accounts for about 50% to 60% of the whole stamping process. Bending: bending of sheet metal, fittings, and profiles into a plastic forming method of angles, curvatures, and shapes. Bending is one of the main processes widely used in the production of stamping parts. The bending of metal material is essentially an elastic-plastic deformation process, after unloading, the workpiece will produce the direction of the elastic recovery, called rebound. Springback affects the accuracy of the workpiece, and it is the key technology that must be considered in the bending process.
Stamping is mainly based on process classification, can be divided into separation process and forming process two major categories. The separation process, also called blanking, is designed to separate the stamping parts from the sheet material along a certain contour line, while ensuring the quality requirements of the separation section (Table 1). The purpose of forming processes is to allow the sheet to undergo plastic deformation without breaking the billet and to make the desired shape and size. In actual production, a variety of processes are often applied to a workpiece. Blanking, bending, shearing, stretching, bulging, spinning and rectification are several main stamping processes.
