(4) Simulation analysis and data processing are a difficult point in the virtual manufacturing of automotive molds, and an important factor hindering the large-scale use of virtual manufacturing technology in enterprises.
Simulation analysis requires a variety of technical support. Data processing requires a large database and talents with professional knowledge. It is necessary to consider the relationship between subsystems from a global perspective and study the interface problems between subsystems. This technology requires multi-disciplinary professional simulation software to work together, and requires professional research and discussion. However, most enterprises are difficult to configure the required simulation analysis software and have the required professionals.
Toyota Motor Corporation of Japan successfully developed the new Toyota AVALON using virtual manufacturing technology. Because the problems that may occur in production can be predicted in the early stage of production, the staff can find and solve problems earlier, and get more information in the early stage of design, thus reducing the development risk of the enterprise. During the entire development process, Toyota AVALON reduced the development cycle by 10 months, reduced the developer by 20%, reduced the production prototype by 70%, and reduced the development cost by 35%. The quality of the produced cars has been significantly improved. It can be seen that virtual manufacturing technology can not only shorten the product development cycle, reduce the development cost of the enterprise, but also improve the quality of the product and the success rate of a research and development.
Current development status of virtual manufacturing
Virtual manufacturing has been in existence for more than 20 years since its introduction, and its technology has been greatly developed, and its application has also been extensively expanded. In foreign countries, many schools, research institutes, research institutes, and large enterprises are constantly researching and applying virtual manufacturing technologies. In recent years, virtual reality technology has been applied to automobile development work, and a relatively complete application system integrating professional theory, engineering design and scientific experiment has been formed. For example, the 1995 American Institute of Standards and Technology report "Conceptual Design Plan for the National Advanced Manufacturing Experiment Platform" highlights the concept of decentralized, multi-node distributed virtual manufacturing (DVM), the virtual enterprise; and the National Research Council The report "Information Technology in Manufacturing" explores information technology issues such as product integration, process design, shop floor control, and virtual factories. Ford Motor Company has also planned to use virtual environment technology to design and develop cars. The company's advanced vehicle technology group applies virtual manufacturing technology to assembly simulation and virtual forming to improve aerodynamics, ergonomics and surface modeling. effect.
Caterpillar Inc., the world's largest manufacturer of excavators and construction equipment, uses virtual design technology to evaluate the internal visibility of new prototypes; the company also plans to use this technology to allow customers to “actually test†new products. Japan has also carried out extensive research on the modeling and simulation technology of virtual manufacturing systems and the construction environment of virtual factories. Several large automobile companies such as Mitsubishi, Toyota, and Honda have made great achievements in the application of virtual manufacturing. Results. In recent years, the virtual reality system of holographic technology applied by Renault Automobile Company of France has a good level of visualization, and has pushed the application of virtual technology in automobile molds to a new level.
China's technical research and practical application in virtual manufacturing is at an early stage, and the knowledge of virtual manufacturing theory is still immature. There are still few applications for the development and manufacture of automotive molds. Some university joint research institutes and enterprises have carried out a lot of research on virtual manufacturing theory, and have also developed many technologies suitable for Chinese enterprises. Technology such as decentralized networked manufacturing, off-site design and manufacturing, such as the research of the Institute of Mechanical Science of the University of Hong Kong and the Hong Kong Polytechnic University, has made a lot of progress; Wuhan Institute of Technology Intelligent Design and Manufacturing Institute and Shanghai Zhenhua Port Machinery Co., Ltd. Cooperation, has developed the "computer-aided design and simulation system for container loading and unloading bridges"; Tsinghua University has made great progress in the research of virtual design environment software, virtual reality, virtual machine tools, virtual vehicle training systems. However, due to the constraints of CAD/CAM/CAE/CAPP and other basic software, simulation software and modeling technology, most of the research on virtual manufacturing technology in China is some unit technology of virtual manufacturing. The research content is basically the assembly and virtual of virtual products. Plastic forming, machine tool overall design, virtual testing, virtual sheet metal forming, virtual CNC machining, and virtual enterprise.
Virtual manufacturing technology is a living technology. Foreign research on virtual technology has reached a level that can be used well for actual production. However, China has not yet developed software products that support virtual manufacturing technology, and has not fully understood the introduction of foreign commercial software. Absorption, can not be used very well in actual production. Compared with foreign research, most of China's research stays in the system framework and overall technology, and the key application-oriented key technologies need to be further improved.
in conclusion
Automotive molds play a very important role in the entire automotive industry, and the automotive industry plays a very important role in the entire manufacturing industry. In the past, a car took two or three years or more from the initial conception to the completion of production. In today's highly developed computer industry, based on the maturity of CAD/CAM/CAE technology, the use of virtual manufacturing technology can greatly shorten the car. The development cycle can also reduce the development cost of the enterprise. Virtual manufacturing technology has a good application prospect in automotive mold manufacturing, but in China, due to various constraints, virtual technology is still used in automotive molds, most of the research is only in theory; in the future In the research, we should do more research in practical applications, combine virtual manufacturing technology and other digital technologies, and use computers and the Internet to better apply the advantages of virtual manufacturing technology.
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