2016 China's precision stamping die technology status

Stamping die is a special process equipment for processing materials (metal or non-metal) into parts (or semi-finished products) in cold stamping processing, called cold stamping die (commonly known as cold die). Stamping is a pressure processing method that applies pressure to a material at a room temperature using a mold mounted on a press to cause separation or plastic deformation to obtain a desired part.

In recent years, the overall technical level of advanced precision stamping dies has been improved rapidly, and its technical level, manufacturing precision, service life and manufacturing cycle have been significantly improved. A considerable part of the high-quality molds have reached the overall level. Close to the international level of similar molds. For example, the company's air-conditioner fin-level progressive die life can reach 500 million strokes, and its production scale and technological development are in a leading position in China. The developed 0.4mm pitch high-precision micro-connector progressive die has a manufacturing precision of 0.5, and the smallest punch 0.13mm directly grinds to the mirror surface, ensuring the finest part of the workpiece 0.17mm, bending accuracy 0.01mm and S-shaped High precision requirements such as bending. The motor core automatic lamination progressive die produced by the company has a service life of more than 150 million punches. The technical level and lamination technology are close to the advanced level of similar foreign molds. Developed a large-scale iron chip progressive die with a diameter of 0.5m on a 400-ton high-speed punch, a large-scale precision die with a 0.88m square iron chip with a 90-rotation large-scale precision die and a 1.2m diameter stator plate. Production level and capability are at the leading position in China.

Specialization has greatly improved the innovation ability of stamping die enterprises, and the technical level has developed in the direction of specialization, precision, excellence and strength. Many high-tech precision stamping dies and new technologies have emerged. It is reported that the air-conditioning fin stepping precision progressive die, which is urgently to be exhibited, can meet the rapid switching production of five types of sheet shapes, and has certain flexible production characteristics. The mold level is equivalent to the international advanced level. The lead frame of the exhibition is 37-station progressive die, one module and three columns. 48 inner and outer lead legs are punched in 1212mm, the minimum spacing is 0.12mm, and the flatness of the product is within 0.01mm. Its high-speed batch production performance and life expectancy are comparable to the international advanced level, and it has obtained structural innovation patents.

Compared with the international advanced level, the precision of many domestic precision stamping dies is getting smaller and smaller. The overall level of some precision stamping dies is equivalent to the international advanced level, not only completely replacing imported, but also a considerable part of the molds are exported to the United States. Industrial developed countries and regions such as Japan. The overall level of precision dies in China is close to the international advanced level, and a considerable number of precision dies are going abroad and participating in the world competition.

The in-depth analysis of the precision stamping die industry in 2016-2021 and the â€œ13th Five-Yearâ€ development planning guidance report show that with the continuous emergence of new processes and new products, foreign stamping dies have moved from conventional single-stage progressive die to multi-functional composite die. The production line is equipped with a combination of mold tooling, extra large progressive die and micro-part stamping and forming die. Most of the Chinese companies still focus on the conventional single-stage progressive die serialization and industrialization. The key technologies of sophisticated molds such as extra large and high-precision, ultra-high-speed stamping, ultra-thin, super-strong and micro-type parts forming stamping dies are not designed for multi-functional composite dies. Therefore, China needs to continuously carry out research on key technologies of new molds, expand its application fields, and lay a solid foundation for catching up with the international advanced level.

In the future, the high-speed precision stamping technology and the general trend of development with high-end molds are toward the development of precision, high-speed, flexible, network, integration, information, intelligence, low-carbon environmental protection and globalization.

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