Car parts mould is a production technology that uses the power of conventional or special stamping equipment to directly subject the sheet metal to the deformation force and deform in the mold, to obtain product parts with a certain shape, size, and performance. Sheet materials, molds, and equipment are the three elements of stamping processing. Stamping is a method of metal cold deformation processing. Therefore, it is called cold stamping or sheet stamping or stamping for short. It is one of the main methods of metal plastic processing (or pressure processing).
Among the steel products of Universal, 50-60% are made of plates, and most of them are finished products made by pressing. Car bodies, radiator fins, steam drums of steam boilers, container shells, motors, electrical iron core silicon steel sheets, etc. are all stamped and processed. There are also a large number of products in instruments and meters, household appliances, office machines, and storage utensils.
Stamping is an efficient approach to mold. The use of composite molds, the exception of which is a multi-station progressive mold, can complete multiple stamping technical operations on one press to complete the automatic generation of materials. The production speed is fast, the rest time is long, the processing cost is low, and the collective can process hundreds of pieces per minute, which is loved by many processing plants.
Compared with castings and forgings, stamping parts have the characteristics of thinness, uniformity, lightness, and strength. Stamping can produce workpieces with reinforcing ribs, ribs, buckling, or flanges that are difficult to manufacture by this skilled hand to improve its rigidity. Due to the rejection of rough molds, the precision of the workpiece can reach the micron level, and the precision is high, the specifications are consistent, and holes, bosses, etc. can be punched out. 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.
The method of applying the principles of plastic mechanics to study the law of metal forming is called plastic analysis of metal forming. Its tasks are:
①Study various solutions related to mechanics in the plastic forming process to analyze the distribution of stress and strain in the deformation body, and determine the deformation force and deformation work, to reasonably select the tonnage of the equipment and the strength of the mold.
②Study the changing law of component strain and size during plastic forming, select appropriate blank and reasonable intermediate blank shape, to optimally achieve the required shape of the component.
③Study the effects of processing conditions such as temperature and strain rate effects on the resistance of metal plastic processing, as well as measures to improve mental toughness and reduce resistance, to obtain components with good performance.
The plastic analysis methods of metal forming mainly include principal stress method, slip line method, upper limit method, finite element method, etc.; while the commonly used experimental methods include the visual plastic method and dense grid moire method.