Architecture of virtual product development platfo

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Abstract: virtual product development (VPD), also known as virtual design and manufacturing (vd&m), is the mapping of the real process of product design and manufacturing in the virtual environment. After briefly describing the technical connotation of virtual product development, aiming at the characteristics of metal plastic forming engineering, this paper puts forward the architecture of virtual product development platform for metal plastic forming, and tentatively gives the definition of its technical content

0, introduction

the revolution caused by the development of information technology has made our society move towards the information society. Nowadays, the development of information technology has become an important symbol to measure the level of modern science and technology. The information revolution has not only caused changes in people's ideas, production methods and lifestyles, but also led to great changes in the means of labor (information has become an important means of labor). With the development of information technology, traditional industries are undergoing a change from expanding the extension to increasing the connotation (increasing the knowledge content in products)

the globalization trend of product market and production makes the traditional manufacturing industry face severe challenges. Due to demand, the voice of changing the face of traditional manufacturing industry is unprecedented. Advanced manufacturing technology represented by information manufacturing technology is making the manufacturing industry in an important period of historical change. In the past decade, the new manufacturing mode has developed rapidly from concept proposal, theoretical exploration to engineering realization, and it is information technology that provides an important supporting means for its development. The concept and corresponding technology of virtual product development are put forward and developed under this situation

The concept of virtual product development was initially formed in the late 1980s and early 1990s. Since then, the technical connotation has expanded rapidly. In just a few years, it has gradually grown into a high-tech discipline with interdisciplinary, broad fields, rich connotation and obvious effectiveness. According to our literature search, there were only a few dozen papers published on Virtual Technology in 1994, which soared to more than 600 in 1996 and 1997

1. Virtual product development

the traditional product development process generally needs to go through many stages, such as conceptual design, scheme design, detail design, laboratory test, medium-sized amplification, batch production and so on, and the product launch cycle is long. This is not suitable for the demand of modern market for products. Virtual product development has a certain correspondence with real product development. The difference is that virtual product development does not consume material resources and energy, so it can greatly reduce the development cost of products. Because virtual product development can evaluate and optimize the product realization scheme before the product is put into production, it improves the feasibility of product realization, greatly simplifies the process of physical test experiment, shortens the product launch cycle, and improves the market competitiveness of products

the key of virtual product development is to develop virtual product development environment. Virtual product development environment is the running space of virtual model. It has the versatility of not relying on specific virtual models, so it is also a general platform for constructing specific virtual models

virtual product development, also known as virtual design and manufacturing, is the mapping of the real process of product design and manufacturing in the virtual environment. In essence, virtual product development is the virtual realization of the whole process (product life cycle) of the product from conceptual design to putting into use in the virtual environment constructed on the computer. Its goal is not only to simulate and visualize the material form and manufacturing process of the product, but also to predict the performance, behavior and function of the product and the implementation scheme in each stage of product realization The highest evaluation and Optimization in history. It is a test bed for product development. Like the real production process, virtual product development can be narrowly divided into virtual design and virtual manufacturing. Schmitz, deputy editor in chief of the American "Computer Aided Engineering" magazine, once described the main technical contents of virtual design in the article "brilliant future of virtual design": virtual prototyping, networked concurrent design, virtual assembly, engineering analysis and interactive visualization of design parameters. Onori and others from Osaka University in Japan have conducted in-depth research on the technical connotation of virtual manufacturing system. They divided the virtual manufacturing system into two parts: virtual information system and virtual physical system, and established the model of virtual manufacturing system development environment

2. Research and application status of virtual product development technology

virtual reality (VR) is a computer-generated three-dimensional environment in which people immerse themselves, manipulate the virtual objects through appropriate interfaces, and interact in the form of human expression. The research of virtual product development needs to use virtual reality technology to construct a product design and manufacturing environment, which integrates the process of design, manufacturing process and prototype manufacturing. At present, the research of virtual product development focuses on the following aspects

technical aspects related to software: (1) visualization: study how to display various information in an intuitive form; (2) Environment construction: study the technology of developing working environment by using virtual reality technology; (3) Information expression: study the expression of information related to methods, semantics and grammar; (4) Meta model modeling method: research and establish a model that can adjust the interaction between models; (5) Integrated Architecture: study how to constitute software and hardware systems; (6) Simulation: study the process of designing a real system model on a computer; (7) Methodology: research, develop and apply the method of virtual product development system; (8) Manufacturing characteristics: study the collection, measurement and analysis of variables that affect material deformation in the manufacturing process; (9) Evaluation: study the evaluation of virtual product development system

technical aspects related to hardware: (1) input and output devices: helmet mounted display (HMD) based on CRT and LCD, ordinary computer display, projection system, visual glasses, data gloves, data vest, roller, rocker, touch pad, tactile ball, microphone, combiner, headphones and sound system; (2) Information collection and storage equipment; (3) High speed computing system; (4) Network structure (star, bus, ring), heterogeneous network, communication hardware, etc

interactive technology: (1) evaluation method of virtual product development environment effectiveness; (2) Ergonomic evaluation related to human-computer interaction and human-computer interaction

different from some other disciplines, the concept of virtual product development has been widely concerned by the business community as soon as it was put forward, and some enterprises immediately began to implement and apply it locally. Ford Motor Company of the United States is the first enterprise to design racing cars using network concurrent design technology. The new SS1 racing car designed and manufactured with this technology took only 9 months from the beginning of design to the first road test. Following the success of the world's first "paperless airliner" - Boeing 777 twin jet aircraft, Boeing decided to adopt virtual product development technology to develop a new generation of 737 airliner. Sandia National Laboratory of the United States uses virtual sample preparation technology to develop a new generation of computer chips, which is only 1/25 the size of the current chip. John Deere company applies virtual product development technology to the design, evaluation and testing of welding equipment installation robots, which greatly shortens the design and manufacturing cycle. Coventry Academy of art and design uses virtual prototype technology to test the virtual road of the car being designed to evaluate the road adaptability and driver's vision of the car. In China, the research on virtual product development has just begun. At present, most of the reported research belongs to the scope of concept and structural framework. Most of the research on development environment is still limited to the level of target system, not deep into the level of virtual design and manufacturing, and there is less research on the core of virtual design and manufacturing - model construction level. Therefore, combined with an engineering discipline, we should focus on solving the major technical basic problems in virtual design and manufacturing, and on the basis of in-depth study of core technologies, establish a virtual product development environment, and deeply develop the model construction environment, so as to establish 3. Specific utilization requirements: establish an application-oriented virtual product development platform, which is of great value to further the research of virtual product development technology

3. Virtual product development of plastic forming

metal plastic forming is one of the important basic industries in the machinery industry. Plastic forming is an integral part of less or no cutting, and plays an important role in parts manufacturing. Due to the complex stress and deformation mechanism of plastic forming process and the serious influence of materials, processes, equipment and other factors, the basic research of theory and application has not been mature for a long time, and is far from reaching the level of basically solving practical production problems. In general, the current plastic forming equipment design and manufacturing, process design and mold design and manufacturing still mainly continue to use the traditional backward design and manufacturing methods, with manual design and manufacturing based on experiments and experience as the main means. The integration of virtual product development technology into traditional plastic forming engineering will lead to the revolutionary development of plastic forming technology and play an important role in changing the backward face of China's plastic forming industry. This paper will discuss all aspects of virtual product development technology of plastic forming, and on this basis, put forward the structural framework of virtual product development platform of plastic forming. The key technology of virtual product development of plastic forming is mainly to jointly carry out the research on the utilization of graphene materials in the field of wire and cable, including the virtual design technology of plastic forming equipment and mold, the virtual process design and process scheme rationalization technology of plastic forming, and the virtual manufacturing technology of plastic forming equipment and mold

4. Structure of virtual product development platform for plastic forming

the key of virtual product development technology for plastic forming is to develop a virtual environment for plastic forming product design and manufacturing, and establish an analysis, simulation and evaluation platform for product design and manufacturing scheme. Because the design and manufacturing of plastic forming products is a complex process, which involves not only the process of material deformation into products, but also forming equipment and dies, the virtual product development environment of plastic forming should be composed of the following three parts: virtual design environment of plastic forming equipment, virtual process design environment of plastic forming and virtual manufacturing environment of plastic forming dies. The structural block diagram of the virtual product development platform of plastic forming is shown in Figure 1

Figure 1 structural block diagram of virtual product development platform of plastic forming

5. Key technologies of virtual product development of plastic forming

(1) virtual design technology of plastic forming equipment

virtual design technology of plastic forming equipment mainly includes virtual prototype, networking concurrent design, virtual assembly and other technologies. Virtual prototype is a virtual prototype, so it should be able to reflect the kinematic and dynamic characteristics of the equipment, predict the motion state of the equipment, and give an evaluation of whether the design meets the preset performance indicators; In addition, it should not only have the appearance shape of the real device, but also dynamically display the real motion of the device. Networking concurrent design technology provides a new design mode. The key to realize network concurrent design is to establish a common design space connected by local area or wide area. In this design space, multiple designers are engaged in the process from preliminary design to detailed design at the position specified in advance; At any time in the design process,

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