In recent years, many mold enterprises have increased their investment in technological progress, which is regarded as an important driving force for enterprise development. Some domestic mold enterprises popularized 2D CAD and began to use international general software such as UG, Pro/Engineer, I-DEAS and Euclid-IS. Some manufacturers also introduced CAE software such as Moldflow, C-Flow, DYNAFORM, Optris, MAGMASOFT, etc., and successfully applied them to the design of stamping dies.
The manufacturing technology of large stamping dies such as automobile panel dies has made great progress. The mold factories of Dongfeng Motor Corporation and FAW Mold Center have been able to produce some auto panel molds. In addition, many research institutions and universities carry out research and development of mold technology. After years of efforts, the technology of mold CAD/CAE/CAM has made remarkable progress. It has made contributions to improving the quality of molds and shortening the design and manufacturing cycle of molds.
For example, KMAS auto panel stamping analysis software independently developed by auto panel forming technology of Jilin University, injection mold, auto panel mold, progressive die CAD/CAE/CAM software developed by State Key Laboratory of Mold Technology of Huazhong University of Science and Technology, cold die and precision die CAD software developed by National Engineering Research Center of Mold CAD of Shanghai Jiaotong University, etc., have many users in the domestic mold industry.
Although China's mold industry has made remarkable progress in the past ten years, there is still a big gap compared with developed countries in many aspects. For example, the proportion of precision machining equipment in mold machining equipment is relatively low; The popularization of CAD/CAE/CAM technology is not high; Many advanced mold technologies have not been widely used, and so on, resulting in a considerable number of large, precise, complex and long-life molds relying on imports.
Development trend of stamping die manufacturing technology in the future
The development of mold technology should serve to meet the requirements of short delivery time, high precision, good quality and low price of mold products. In order to meet this requirement, it is urgent to develop the following projects:
(1) Fully popularize CAD/CAM/CAE technology?
Mold CAD/CAM/CAE technology is the development direction of mold design and manufacturing. With the development and progress of microcomputer software, the conditions for popularizing CAD/CAM/CAE technology are basically mature, and enterprises will increase the intensity of CAD/CAM technical training and technical services; Further expand the application scope of CAE technology. The development of computer and network makes it possible for CAD/CAM/CAE technology to be popularized across regions, enterprises and research institutes in the whole industry, realizes the re-integration of technical resources and makes virtual manufacturing possible.
(2) high-speed milling
The high-speed milling developed abroad in recent years has greatly improved the machining efficiency and achieved a high surface finish. In addition, it can also process modules with high hardness, which has the advantages of low temperature rise and small thermal deformation. The development of high-speed milling technology has injected new vitality into the manufacture of large cavity molds in automobile and household appliances industries. At present, it has developed towards higher agility, intelligence and integration.
(3) Mold scanning and digitization system?
High-speed scanner and mold scanning system provide many functions needed from model or object scanning to machining expected model, which greatly shortens the mold development and manufacturing cycle. Some fast scanning systems can be quickly installed on existing CNC milling machines and machining centers to realize fast data acquisition, automatically generate machining programs of different CNC systems and CAD data of different formats, and use them in "reverse engineering" of mold manufacturing industry. Mould scanning system has been successfully applied in automobile, motorcycle, household appliances and other industries, and it is believed that it will play a greater role during the Tenth Five-Year Plan period.
(4) EDM milling?
EDM milling technology, also known as EDM generating processing technology, is a new technology that replaces traditional cavity processing with special-shaped electrodes. It is a simple high-speed rotating tubular electrode, which is used for three-dimensional or two-dimensional contour machining (like CNC milling), so it is no longer necessary to manufacture electrodes with complex shapes, which is obviously a major development in the field of EDM. Machine tools using this technology have been applied to mold processing abroad. It is expected that this technology will be developed. ?
(5) Improve the standardization of molds?
The standardization of molds in China is constantly improving, and it is estimated that the coverage rate of mold standard parts in China has reached about 30%. Generally, it is about 80% in developed countries.
(6) High quality materials and advanced surface treatment technology?
It is very necessary to select high-quality steel and apply corresponding surface treatment technology to improve the service life of dies. Die heat treatment and surface treatment are the key links to give full play to the properties of die steel materials. The development direction of mold heat treatment is vacuum heat treatment. In addition to improving mold surface treatment, advanced technologies such as vapor deposition (TiN, TiC, etc. ) and plasma spraying technology.
(7) Mould grinding and polishing will realize automation and intelligence?
The surface quality of die has a great influence on the service life of die and the appearance quality of parts. It is an important development trend to study automatic and intelligent grinding and polishing methods instead of existing manual operations to improve the surface quality of molds. ?
(8) The development of mold automatic processing system?
This is the long-term development goal of our country. Automatic mold processing system should have a reasonable combination of multiple machine tools; Equipped with a matching positioning fixture or positioning disk; Have a complete CNC machine tool library; Have a complete CNC flexible synchronization system; There are quality monitoring and control systems.