Discussion on Virtual Manufacturing Technology and Its Development and Application

Discussion on Virtual Manufacturing Technology and Its Development and Application

Virtual manufacturing technology is developed on the basis of CAD/CAM/CAE technology. On the one hand, CAD/CAM/CAE technology provides a relatively mature technical foundation for the realization of virtual manufacturing, such as modeling technology, analysis and optimization technology, manufacturing process simulation technology, analysis and evaluation technology, design analysis and evaluation technology and product information integration, transformation and sharing technology. Especially feature modeling technology plays an extremely important role in virtual manufacturing technology. On the other hand, virtual manufacturing technology transcends CAD/CAM/CAE technology, and mainly considers the integration and modeling of product information, while virtual manufacturing technology also considers the modeling of machining process and other issues.

Basic concepts of virtual manufacturing technology.

Virtual manufacturing technology (VMT) is a new idea which was put forward in the late 1980s and developed rapidly. Based on virtual reality and simulation technology, it models the design and production process of products, and simulates and simulates the whole life cycle of products from design, processing, assembly, inspection and use on the computer. Using virtual manufacturing technology, the product, its performance and manufacturing process can be simulated in the design stage of the product, so as to optimize the design quality and manufacturing process of the product, optimize production management and resource planning, and minimize the development cycle and cost of the product.

2. The main characteristics of virtual manufacturing technology:

2. 1 Fully simulate and highly integrate the elements of the manufacturing system by using information technology.

Through the combination and matching of product model, process model and resource model, the behavior of equipment layout, production activities and business activities in a specific manufacturing system, as well as the overall configuration of various elements of the manufacturing system (people, technology, management, environment, etc.) are simulated. ), thus ensuring the feasibility, rationality, economy and high adaptability of the manufacturing system, providing a broader space for the further development of advanced manufacturing technology and promoting the continuous development and progress of related technologies.

2.2 Natural interaction between human and virtual manufacturing environment

The virtual manufacturing environment is people-centered, which enables researchers to immerse themselves in the virtual environment created by the model, directly feel the model operation information mapped by different media through various perceptual channels, and fuse information by using people's own intelligence to produce a comprehensive mapping, thus profoundly grasping the internal essence of things. The interaction between human and virtual manufacturing environment is beneficial to deepen people's knowledge and understanding of production process and manufacturing system, sublimate its theory and better guide actual production. It is also conducive to training production personnel in simulated operation and emergency handling of abnormal processes. To speed up the cultivation of enterprise talents.

3 Research contents and key technologies of virtual manufacturing technology

3. 1 research content of virtual manufacturing technology

Because virtual manufacturing involves a wide range of technical fields, and many technologies are not unique to virtual manufacturing, some technologies have been studied and applied in other fields for a long time. For example, CAD/CAM/CAE technology provides a mature technical foundation for the realization of virtual manufacturing, and the development of computer technology such as multimedia remote communication, network technology, information integration and three-dimensional solid modeling technology provides strong support for the realization of virtual manufacturing functions. In recent years, virtual manufacturing has made great progress in basic research and technology development, and information integration technology has also been widely used in virtual manufacturing. However, virtual manufacturing technology is not a simple combination of existing single technologies, but a systematic organization of manufacturing knowledge, a comprehensive modeling of engineering objects and manufacturing activities, and an integration based on related theories and accumulated knowledge.

As far as the current research status is concerned, virtual manufacturing technology needs high computing power, high speed and low cost software and hardware support, which is used for virtual simulation of product manufacturing process, knowledge extraction of manufacturing enterprise activities, interruption intervention of system process evaluation and so on. At present, the development of software lags far behind that of hardware, and there are still many related technologies that need to be studied and developed if virtual manufacturing technology is to truly become a sharp weapon of modern manufacturing technology. The research and application of virtual manufacturing technology has great potential.

3.2 Key technologies of virtual manufacturing

The key technologies of virtual manufacturing can be divided into soft and hard aspects. Currently, these technologies are still in the process of development and improvement. In contrast, the development of software lags far behind that of hardware.

The key technologies of the software include manufacturing system modeling, product development, manufacturing process simulation and manufacturability evaluation. Software technology is the key technology to create a highly interactive, real-time and realistic virtual environment. When developing software, we should consider the modeling of virtual environment and the interactivity and roaming of built environment.

The main technologies involved in the software are visualization technology, that is, displaying all kinds of information to users in a meaningful and understandable virtual way; Developing environment construction technology, that is, an environment similar to a general operating system, to promote visualization and other VM functions; Information description technology, that is, using different methods, different semantics or grammars to express different information, integrating structured technology and establishing hardware and software technologies; Simulation technology, the process of designing and simulating real-time system in computer; Methodology, find out the method of developing and using VMS; Manufacturing characterization technology. Obtain, measure and analyze the variables that affect material removal in the manufacturing process; Implementation, measurement and inspection technology of VMS; Ergonomics evaluation and optimization technology for man-machine and human. In a virtual machine environment.

The main technologies involved in hardware are input/output devices, such as HMD, suitable computer screen, glasses, data gloves, 3D mouse, data clothing and virtual audio equipment. Information storage devices related to input/output; A computer system that can support various devices, data storage and high-speed operation, and the system should have the ability to provide high-quality pictures in real time according to users' needs; Network architecture equipment and hardware equipment at different sites (such as minicomputers, graphic workstations, PCs, etc.). ).

Through the combination of software and hardware technology, a virtual reality computing platform is established, which comprehensively processes all kinds of input information in VRS and produces interactive output results for users.

4. Concluding remarks

Virtual manufacturing technology is a new advanced manufacturing technology. Based on the characteristics, research contents and several key technologies of virtual manufacturing, the research status, existing problems and research direction of virtual manufacturing are summarized and commented. It can be seen that although some research achievements have been made at home and abroad in recent years, there are still many problems that need to be further studied, especially the modeling and simulation of manufacturing system and the integrated system oriented to the whole process of virtual product development. I believe that through the efforts of virtual manufacturing researchers all over the world, the era of digital manufacturing will surely come.

References:

[1] Bo Huang. Virtual manufacturing technology and its research. Journal of Suzhou Vocational University, 2006. ( 1 1)

[2] Xiao Tianyuan. Virtual manufacturing. Beijing: Tsinghua University Publishing House, 2004.

[3] Jia Guangfei, Ge,,. Virtual manufacturing technology and its development strategy in China

[4] Xue Haoran. Analysis on the development strategy of virtual manufacturing technology. Shanxi Electronic Technology, 2003, (3): 37-38.

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