The global automotive mold industry has shown a nine development trend
At present, the global auto mould industry showing nine development trend, namely: the simulation of stamping forming process (CAE) a more prominent role, three-dimensional design of the mold manufacturing status can fine consolidation, digital die technology has become the mainstream direction of rapid development, mold processing, automatic stamping technology of high strength steel plate is scientific and informatization development direction in the future new mold products, the timely introduction of die materials and surface treatment technology will be reused, management is the direction of development, mold mold enterprise is an inevitable trend.
The role of simulation (CAE) in stamping process is more prominent
In recent years, with the rapid development of computer software and hardware, the simulation technology of stamping forming process (CAE) is playing an increasingly important role. In developed countries the United States, Japan, Germany, CAE technology has become a necessary part of the process of mold design and manufacture, widely used to predict the forming defects and optimization of stamping process and die structure, improve the reliability of mold design, reduce the trial time.
Many domestic automotive mold enterprises have made significant progress in the application of CAE, and achieved good results. The application of CAE technology can greatly reduce the cost of mold testing and shorten the development cycle of stamping die. It has become an important means to ensure the quality of mold. CAE technology is gradually transforming mold design from experience design to scientific design.
Three dimensional mold design position can be consolidated
The three-dimensional design of mold is an important content of digital die technology, and is the basis for realizing the integration of mould design, manufacture and inspection. Japanese TOYOTA, general motors and other companies have achieved the three-dimensional design of the mold, and achieved good application results. Some methods adopted in the 3D design of moulds should be used for reference. Besides the advantages of integrated manufacturing, the three dimensional die design is convenient for interference checking, and it can be used for motion interference analysis, and solves a difficult problem in two-dimensional design.
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 faced in the development of automotive mold. The so-called digital mold technology, that is, computer technology or computer aided technology (CAX) in the mold design and manufacturing process.
Summing up the successful experiences of computer aided technology applied in automobile mould enterprises both at home and abroad, the main aspects of digital automobile mould technology are as follows:
Manufacturability design (DFM), that is, manufacturability is considered and analyzed at design time to ensure the success of the process.
Auxiliary technology of mold surface design, development of intelligent surface design technology.
CAE aided analysis and Simulation of stamping process, predict and solve possible defects and forming problems.
Using 3D mold structure design to replace the traditional two-dimensional design.
Mold manufacturing process using CAPP, CAM and CAT technology.
In the digital technology under the guidance of solving process of mold and stamping production problems.
The rapid development of die processing automation
Advanced processing technology and equipment are the important basis for improving productivity and ensuring product quality. In the advanced automobile mould enterprise, the numerical control machine tool, automatic cutter changer (ATC), automatic processing photoelectric control system and workpiece on-line measuring system with double worktable are not uncommon. NC machining has developed from simple surface processing to full machining of profile and structural surface. It has developed from medium low speed machining to high speed machining, and the development of machining automation technology is very rapid.
High strength steel sheet stamping technology is the future direction of development
Because of its excellent characteristics such as yield strength ratio, strain hardening property, strain distribution ability and impact energy absorption, high strength steel has been used more and more in automobiles. At present, the high strength steel used in automobile stamping parts mainly consists of paint hardened steel (BH steel), dual phase steel (DP steel), phase change induction plastic steel (TRIP steel) and so on. The ultra light body project (ULSAB) advanced concept car launched in 97% (ULSAB-AVC) materials for high strength steel, the proportion of advanced high strength steel in the vehicle industry will be more than 60%, of which the proportion of dual phase steel will account for 74% of the vehicle steel. Now, a large number of the use of IF steel mild steel, high strength steel series series will be replaced, high strength low alloy steel will be dual phase steel and ultra high strength steel plate instead of.
At present, the application of the domestic auto parts of high strength steel is limited to structure and beam parts, materials with tensile strength more than 500MPa below, therefore, quickly grasp the high strength steel plate stamping technology, is an important issue in China's automobile mould industry to be solved.
Timely launch of new mold products
With the development of high efficiency and automation of automobile stamping production, progressive die will be widely used in the production of automobile stamping parts. The stamping parts with complicated shapes, especially those small and medium complex stamping parts which are produced by the traditional process, are more and more progressive.
Progressive die is a kind of high and new technology mold product. It is difficult in technology, high in manufacturing accuracy and long in production cycle. Multi position progressive die is one of the most important mould products in our country.
Mold material and surface treatment technology will be reused
The quality and performance of mold materials are important factors affecting the quality, life and cost of the die. In recent years, in addition to a variety of high toughness and high wear resistance, cold working die steel, flame quenching, cold working die steel, powder