The nine development trends of automobile mold industry at home and abroad

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Mold is the basic process equipment of the automobile industry, and more than 90% of the parts in automobile production need to rely on mold forming. According to reports, it takes about 1500 sets of molds to make an ordinary car, of which about 1000 sets of stamping molds. In the development of new models, 90% of the workload is around the change of body profile. About 60% of the development cost of new models is used for the development of body and stamping processes and equipment. About 40% of the vehicle manufacturing cost is the cost of body stamping parts and their assembly.
In the development of the automotive mold industry at home and abroad, the mold technology presents the following nine development trends.
1. The position of three-dimensional mold design has been consolidated
The three-dimensional design of the mold is an important part of the digital mold technology, and it is the basis for the integration of mold design, manufacturing and inspection. Japan's Toyota, the United States General Motors and other companies have realized the three-dimensional design of the mold, and achieved good results. Some of the practices adopted in the three-dimensional design of molds abroad are worthy of our reference. In addition to the three-dimensional design of the mold is conducive to the realization of integrated manufacturing, another advantage is to facilitate interference inspection, motion interference analysis, to solve a problem in the two-dimensional design.
2. The role of stamping process simulation (CAE) is more prominent
In recent years, with the rapid development of computer software and hardware, the simulation technology of stamping forming process (CAE) plays an increasingly important role. In the United States, Japan, Germany and other developed countries, CAE technology has become a necessary part of the mold design and manufacturing process, widely used to predict forming defects, optimize the stamping process and mold structure, improve the reliability of mold design, reduce the test time. Many domestic automotive mold enterprises have also made significant progress in the application of CAE and achieved good results. The application of CAE technology can greatly save the cost of mold testing and shorten the development cycle of stamping dies, which has become an important means to ensure the quality of molds. CAE technology is gradually making the mold design from experience design to scientific design.
3, digital mold technology has become the mainstream direction
In recent years, the rapid development of digital mold technology is an effective way to solve many problems in the development of automobile mold. The so-called digital mold technology is the application of computer technology or computer-aided technology (CAX) in the mold design and manufacturing process. Summarizing the successful experience of the application of computer-aided technology in domestic and foreign automobile mold enterprises, digital automobile mold technology mainly includes the following aspects: ①Design for manufacturability (DFM), that is, considering and analyzing manufacturability in design to ensure the success of the process. The auxiliary technology of mold surface design, the development of intelligent surface design technology. ③ CAE-assisted analysis and simulation of stamping process, predict and solve possible defects and forming problems. ④ Replace the traditional two-dimensional design with three-dimensional mold structure design. ⑤ Mold manufacturing process using CAPP, CAM and CAT technology. ⑥ Under the guidance of digital technology, solve the problems in the process of mold testing and stamping production.
4, the rapid development of mold processing automation
Advanced processing technology and equipment is an important basis for improving productivity and ensuring product quality. In the advanced automotive mold enterprises equipped with dual-table CNC machine tools, automatic tool changer (ATC), automatic processing of the photoelectric control system, the workpiece online measurement system is not uncommon. CNC machining has developed from a simple surface processing to a comprehensive surface and structural surface processing, from low-speed processing to high-speed processing, processing automation technology is developing very rapidly.
5. High-strength steel plate stamping technology is the future development direction
High-strength steels are increasingly used in automobiles due to their excellent properties in terms of yield ratio, strain hardening characteristics, strain distribution capacity and impact energy absorption. At present, the high strength steel used in automobile stamping parts mainly includes baking varnish hardening steel (BH steel), dual phase steel (DP steel), transformation induced plasticity steel (TRIP steel) and so on. The International Ultra-Light Body Project (ULSAB) expects 97% of the advanced concept models (ULSAB-AVC) to be launched in 2010 to be made of high-strength steel. The proportion of advanced high-strength steel plates in vehicle materials will exceed 60%, and the proportion of dual-phase steel will account for 74% of vehicle steel plates.
Now a large number of IF steel-based mild steel series will be replaced by high-strength steel series, high-strength low-alloy steel will be replaced by dual-phase steel and ultra-high-strength steel. At present, the application of high-strength steel plates for domestic auto parts is still limited to structural parts and beams, and the tensile strength of the materials used is mostly below 500MPa. Therefore, the rapid mastery of high-strength steel stamping technology is an important problem to be solved in China's automobile mold industry.
6, the new mold products timely launch
With the development of high efficiency and automation of automobile stamping production, progressive dies will be more widely used in the production of automobile stamping parts. Progressive die is a kind of high-tech mold products, technical difficulty, high manufacturing precision requirements, long production cycle, multi-position progressive die will be one of the key development of mold products in China, the shape of complex stamping parts, especially some according to the traditional process requires more than a pair of stamping die in order of small and medium-sized complex stamping parts, more and more use of progressive die forming.
7, mold materials and surface treatment technology will be reused
The quality and performance of the mold material are important factors affecting the quality, life and cost of the mold. In recent years, in addition to a variety of high toughness and high wear resistance cold work die steel, flame quenching cold work die steel, powder metallurgy cold work die steel introduced, foreign in large and medium-sized stamping die on the selection of cast iron materials, is a noteworthy trend of development. Ductile iron has good toughness and wear resistance, its welding performance, machinability, surface quenching performance are also better, and the cost is lower than alloy cast iron, so it is widely used in automobile stamping dies.
8. Scientific and information management is the development direction of mold enterprises
Another important aspect of the development of automobile mold technology is the scientific and information management. The scientific management of mold enterprises continue to make (Just-in- TimeManufacturing) and lean production (LeanProduction) in the direction of development, enterprise management is more accurate, production efficiency is greatly improved, ineffective institutions, links and personnel continue to streamline. With the progress of modern management technology, many advanced information management tools, including enterprise resource management system (ERP), customer relationship management (CRM), supply chain management (SCM), project management (PM), etc., are widely used in mold enterprises.
9. Fine manufacturing of molds is an inevitable trend
The so-called mold fine manufacturing is the development process and manufacturing results of the mold, specifically manifested in the rationalization of the stamping process and mold structure design, the high precision of mold processing, the high reliability of mold products and the rigor of technical management. Mold fine manufacturing is not a single technology, the second is a comprehensive reflection of design, processing and management technology. In addition to the realization of the mold fine manufacturing technology excellence, but also rely on strict management to protect.