Automotive industry must increase the degree of mold fixture integration

Japan's Toyota, Germany Volkswagen and other international leading automotive manufacturers, have a special stamping, welding, assembly, painting process personnel. Together with the body designer of the R&D center, they performed a process analysis of the product.

From the car body design to the tooling manufacturing, all follow the principle of unity. The degree of integration is very high, which is very beneficial to the overall control of the body quality, cost, and cycle. Most of China's mold and welding folder industries are fighting each other. It is difficult to communicate between mold manufacturers and welding clamp manufacturers. Many problems are stuck in the production preparation stage of auto manufacturers, which seriously restricts the product quality and output of the white body. cycle.

Due to the limitation of the special structure of mold materials and molds, the current level of stamping technology for auto body molds in China is still at a certain distance from the foreign counterparts. This is mainly reflected in the experience and experience of process designers. There are too many differences between the types of models that domestic process designers are exposed to and those of foreign process designers, which leads to some constraints on process design ideas.

The foreign stamping process design is a highly specialized job with a clear division of labor. This complex design process needs to be completed through teamwork. It generally includes the preliminary product process analysis, process plan prediction, model construction, process feasibility analysis, and model design. Repeated optimization and other design processes.

Take the overall side of the car as an example, the general side molding die is generally 5 to 6 processes. Four years ago, Toyota changed its sidewalk from five processes to four processes, and intensified efforts in mold development and product development to achieve a major leap in the industry. The current research direction is to complete the overall side wall stamping process through three processes. This not only requires the improvement of the stamping process, but also requires the collaborative research and development of the synchronous engineering. When designing the product, the overall side wall of the car should fully consider the stamping process. The feasibility of the process.

Some advanced companies in the world have a high level of ability to develop welding equipment, and have formed a small number of small and medium-sized enterprises with a high degree of professionalism as the core of the company. pattern. Foreign companies such as Japan's Toyota, Volkswagen, France Peugeot, and U.S. General Motors have applied three-dimensional digital process planning and simulation software for nearly a decade. In China, there is a lack of unified digital information management methods for large-scale, high-automation welding line process planning, and no planning capability for such high-level automated welding lines has yet been formed.

The equipment of China's white-car body manufacturing industry is now close to the world's leading level both in terms of quantity and advancement. According to incomplete statistics, just taking the automotive mold industry as an example, the number of domestic large-scale CNC machine tools has exceeded 800 units, but due to our late start-up and insufficient accumulation, there is still a large gap between the manufacturing technology level and the international advanced level. To make our country a big mold country and a powerful mold country, the industry needs to make gritty efforts.

China's auto mold industry is lagging behind, with unstable material types and material properties. These problems include: the variety and quality of standard parts are not high; the gap in manufacturing process level leads to higher processing costs than foreign manufacturers; edge hardening techniques such as induction hardening/laser quenching/nitridation/titanium are to be developed; data feedback and stamping processes after commissioning Insufficient accumulation of experience, lack of effective measures to integrate the fitter's debugging and dressing process into the early stage of design; lack of systematic management procedures and ability to gradually upgrade.