Design features of metal stamping parts

Metal 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 punching, and its purpose is to separate the stamping parts from the sheet along a certain contour line while ensuring the quality requirements of the separated section. The purpose of the forming process is to make the sheet metal plastically deform without breaking the billet to make a workpiece of the required shape and size. In actual production, multiple processes are often applied to one workpiece. Blanking, bending, shearing, deep drawing, bulging, spinning, and correction are the main stamping processes. The surface and internal properties of the sheet metal used for stamping metal stamping have a great influence on the quality of the stamping product. The thickness of the stamping material is required to be accurate and uniform; the surface is smooth, without spots, scars, scratches, surface cracks, etc.; uniform yield strength , No obvious directionality; high uniform elongation; low yield ratio; low work hardening. Hardware cold stamping parts have high production efficiency, good working conditions, and low production costs. Generally, hundreds of pieces can be produced per minute. Generally, it is no longer processed by cutting, or only a small amount of cutting processing is required. The precision and surface condition of hot stamping parts are lower than cold stamping parts, but still better than castings and forgings, and the cutting amount is less. Stamping is an efficient production method. Using compound dies, especially multi-station progressive dies, multiple stamping processes can be completed on one press, and the whole process from strip uncoiling, leveling, punching to forming and finishing can be achieved. Automatic production. The design of metal stamping parts must be conducive to improving the utilization rate of metal materials, reducing material varieties and specifications, and reducing material consumption as much as possible. Use low-cost materials where permitted, and make the parts as waste-free and waste-less as possible. The design of metal stamping parts must be simple in shape and reasonable in structure in order to simplify the mold structure and simplify the number of processes, that is, to complete the processing of the entire part with the least and simplest stamping process, reduce the use of other methods to process, and facilitate the stamping operation. Facilitate the organization of mechanized and automated production to improve labor productivity. In actual production, process tests similar to the stamping process are commonly used, such as drawing performance test, bulging performance test, etc. to test the stamping performance of the material to ensure the quality of the finished product and a high pass rate. Previous post: Problems in my country's stamping parts market