However, it should be pointed out that the practice of the past 30 years proves that although the flexible manufacturing production mode has greatly promoted the development of the manufacturing industry, its actual effect is far from the expectations of people due to various factors.
Virtual Manufacturing <br> <br> virtual manufacturing, also known as Virtual Manufacturing, is a new idea in the late 1980s the United States first proposed, it is the use of information technology, simulation technology, computer technology and others on the reality of manufacturing activities, Comprehensive simulation of materials, information and manufacturing processes to identify problems that may arise during manufacturing, and take precautionary measures before actual production of the product, so that the product can be successfully manufactured in one time to reduce costs, shorten product development cycle, and enhance competition among enterprises. The purpose of force.
In virtual manufacturing, the product is simulated and simulated on the computer from the initial shape design, production process modeling, model assembly to inspection. The actual production process is not required to verify the rationality of the mold design. Therefore, the troubles brought by the pre-design to the post-processing manufacturing can be reduced, and the situation that the mold is scrapped can be avoided, thereby achieving the purpose of improving the yield of the product development, shortening the product development cycle, and reducing the manufacturing cost of the enterprise.
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. 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, Ford Motor Company and Chrysler Automobile Company have applied virtual manufacturing technology in the development of new vehicles, which has greatly shortened the release time of products; several large Japanese auto companies such as Mitsubishi, Toyota and Honda are applying virtual manufacturing. Great results have been achieved; the virtual reality system of holographic technology applied by Renault Automobiles of France has a good level of visualization, and has pushed the application of virtual technology in automobile molds to a new level. In addition, Boeing's 777 large passenger aircraft is the world's first aircraft designed in three-dimensional paperless mode. Its design success has become a milestone in the virtual manufacturing from theoretical research to practical use.
Compared with foreign research, most of China's research on virtual manufacturing still stays in the system framework and overall technology, and the key application-oriented key technologies need to be improved. Some university joint research institutes and enterprises have conducted 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 and development of "computer-aided design and simulation system for container loading and unloading bridges"; Tsinghua University has made great progress in research on virtual design environment software, virtual reality, virtual machine tools, and virtual vehicle training systems. However, due to the constraints of basic software such as CAD/CAM/CAE/CAPP, 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 of virtual products. Machine tool overall design, virtual testing and virtual enterprise.
At present, the virtual manufacturing of Chinese enterprises is mainly used to generate virtual prototypes of products with high credibility. In the product design stage, the final performance and manufacturability of the designed products can be predicted with high confidence. In industries with high-tech content requirements, such as aerospace, military, precision machine tools, microelectronics, etc., with the deepening of research and the development of related technologies, virtual manufacturing will be increasingly widely used.
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