In recent years, the level of stamping die in China has been greatly improved. Large stamping die has been able to produce a single set of weight of more than 50 tons of die. For the mid-range car supporting the covering parts mold can also be produced in China. In the view of Luo Baihui, Secretary general of the International Mold Association, China's stamping die has been greatly developed in terms of quantity, or in terms of quality, technology and ability, but compared with the national economic needs and the world's advanced level, the gap is still very large, some large, sophisticated, complex, long-life high-grade molds are still imported every year, especially the cover parts of high-end cars. It is still mainly dependent on imports.
Automotive mold design and manufacturing capability
The 21st century has entered the information age, the development of the information age is changing with each passing day, the mold industry and enterprises must grasp the pulse of The Times to develop, consciously and actively adjust their own technical structure. The traditional mold design and manufacturing technology must be carried out with advanced and applicable high and new technology, the technical content of the mold will be gradually and rapidly improved, and the management technology of modern industrial enterprises will gradually replace the workshop-type management mode. After decades of efforts, now the design and manufacturing capacity of stamping die in China has reached a high level, including information engineering and virtual technology, many modern design and manufacturing technologies have been applied in many mold enterprises. However, there is still a big gap between China's stamping die design and manufacturing capacity and the market needs and the international advanced level.
In recent years, some new methods of rapid prototyping have emerged around the trial production of automobile body and the rapid manufacturing of large coverings. For example, at present, it has begun to apply in the production of multi-point molding and laser shock and electromagnetic forming technology. They have shown the advantages of reducing costs and improving efficiency. These are mainly reflected in high-end cars and large and medium-sized automobile covering die and high-precision die, whether in design or processing technology and capacity, there is a big gap. The car covering die has the characteristics of difficult design and manufacturing, high quality and precision requirements, and can represent the level of the covering die.
Although the design and manufacturing methods and means have basically reached the international level, the mold structure and function are also close to the international level, and the car mold has made a big step forward in the process of localization, but in terms of manufacturing quality, precision, manufacturing cycle, there is still a certain gap compared with foreign countries. The mold manufacturing technology of automobile covering parts is constantly improving and improving, and the use of high-precision and high-benefit processing equipment is becoming more and more extensive. Luo Baihui, secretary-general of the International Modeling Association, pointed out that the application of high-performance five-axis high-speed milling machines and three-axis high-speed milling machines has been increasing. The application of NC and DNC technology is more and more mature, and it can carry out inclination machining and super finishing. All these improve the machining accuracy of the mold surface, improve the quality of the mold, and shorten the manufacturing cycle of the mold.
The degree of specialization of China's mold industry is still relatively low, and the proportion of mold self-production is too high. As Luo Baihui, secretary-general of the International Mold Association, pointed out, the proportion of foreign mold self-production and self-matching is generally 30%, and the proportion of self-production and self-matching in China is 60%. Due to the high proportion of self-matching, the distribution of the production capacity of stamping die basically follows the distribution of the production capacity of stamping parts. However, the distribution of many professional production enterprises with a high degree of specialization in automotive covering parts molds and multi-station, multi-function precision dies does not follow the distribution of stamping parts, and often depends on the decision of the main investor. For example, Sichuan has a large ability to mold automobile covering parts, Jiangsu has a strong ability to precision die, and most of the users of the mold are not local.
The prospect of automobile stamping die:
With the continuous improvement of the quality of industrial products, the production of stamping products is showing the characteristics of multi-variety, small batch, complex, large, precise, and fast replacement speed, and the stamping die is developing in the direction of high efficiency, precision, long life and large-scale. The focus of the development of automobile covering die is the middle and high-end car large and medium-sized covering die with high technical requirements, especially the outer covering die. The stamping die of high strength plate and unequal thickness plate and large multi-station progressive die and continuous die will have rapid development in the future. According to the understanding of gold mold network, the development focus of multi-function, multi-station progressive die is high precision, high efficiency and large, high life progressive die. The development of fine die is focused on thick plate fine die large fine die, and constantly improve its accuracy.
