The difference between stamping and casting

Stamping is mainly classified by 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. 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 entire process from strip uncoiling, leveling, punching to forming and finishing can be achieved. Automatic production. The production efficiency is high, the working conditions are good, and the production cost is low. Generally, hundreds of pieces can be produced per minute. 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 tasks. Castings are metal moldings obtained by various casting methods, that is, the smelted liquid metal is poured into a pre-prepared casting mold by pouring, injection, suction or other casting methods, and after cooling, it is shaken out, cleaned and treated. Processing, etc., to obtain an object with a certain shape, size and performance. The difference between metal stamping parts and castings: With the characteristics of thinness, uniformity, lightness, and strength, stamping can produce workpieces with ribs, ribs, undulations or flanges that are difficult to manufacture by other methods to improve their rigidity. Due to the use of precision molds, the precision of the workpiece can reach the micron level, and the difference between heavy stamping parts and castings: thin, uniform, light and strong stamping can produce ribs, ribs, undulations or turnings that are difficult to manufacture by other methods Side of the workpiece to increase its rigidity. Due to the use of precision molds, the precision of the workpiece can reach the micron level, and the repeatability is high, the specifications are consistent, and holes, bosses, etc. can be punched out. Hardness testing of stamping parts Hardness testing of metal stamping parts adopts Rockwell hardness tester. Small stamping parts with complex shapes can be used to test the plane is very small, can not be tested on the ordinary desktop Rockwell hardness tester. Hardness testing of castings 　The properties of the castings directly affect the quality of the processing, and the hardness value is an important indicator that determines the processing of the castings.　　1. Brinell hardness: Mainly used to determine the hardness of castings, forgings, non-ferrous metal parts, hot-rolled blanks and annealed parts, and the measurement range is HB450.　　2. Rockwell hardness: HRA is mainly used for high-hardness specimens to determine the hardness of materials and surface hardness above HRC67, such as cemented carbide, nitrided steel, etc., and the measurement range is HRA>70. HRC is mainly used to determine the hardness of steel parts (such as carbon steel, tool steel, alloy steel, etc.) after quenching or tempering, and the measurement range is HRC20~67.　　3. Vickers hardness: used to determine the hardness of thin parts and steel parts, and can also be used to determine the hardness of surface hardened parts such as carburizing, cyanidation, and nitriding. Related news: The characteristics of the main materials of stamping parts, the treatment of common problems of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspections