1. Mold problem
The molds used in stamping processing are generally specialized. Sometimes a complex part needs several sets of molds to be processed and formed, and the mold manufacturing has high precision and high technical requirements, and is a technology-intensive product. Therefore, only in the case of large production batches of stamping parts, the advantages of stamping processing can be fully reflected, so as to obtain better economic benefits.
2. Security issues
Stamping also has some problems and disadvantages. It is mainly manifested in the noise and vibration generated during the stamping process, and the operator's safety accident occurs from time to time. However, these problems are not entirely caused by the stamping process and the mold itself, but are mainly caused by traditional stamping equipment and backward manual operations. With the advancement of science and technology, especially the development of computer technology, and the advancement of mechatronics technology, these problems will definitely be solved as soon as possible.
3. High-strength steel stamping
Today's high-strength steel and ultra-high-strength steel have well achieved the lightweight of vehicles and improved the crash strength and safety performance of vehicles, so they have become an important development direction of vehicle steel. However, with the improvement of sheet strength, the traditional cold stamping process is prone to rupture during the forming process, which cannot meet the processing requirements of high-strength steel sheets. In the case that the forming conditions cannot be met, the hot stamping technology of ultra-high-strength steel plates is gradually being studied internationally. This technology is a new process that integrates forming, heat transfer and microstructure transformation. It mainly uses the characteristics of high-temperature austenite state, the plasticity of the sheet increases and the yield strength decreases, and the forming process is carried out through the mold. However, thermoforming requires in-depth research on process conditions, metal phase transformation, and CAE analysis technology. At present, this technology is monopolized by foreign manufacturers, and domestic development is slow.
