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1、英文原文THE PROGRAMMES OF MODERN MECHANICAL DESIGN The mechanical design of products that is not purely mathematical calculations using the methods, also difficult to use mathematical models to describe the complete, and must be in accordance with product features Formal description help design expert k
2、nowledge and experience for reasoning and decision-making. Thus, for the purpose of computer-aided design products, the need to address the use of computer storage and product design knowledge and design experts, and other parties to the decision-making problem, The resulting product characteristics
3、 of knowledge-based design methods. At present, the intelligent design method is to use 3D graphics software and virtual reality technology in design, visualization better, Users can develop early in a certain degree of direct participation in the design, but systemic poor, and parts of the structur
4、e, shape, Size, location to determine the reasonable, demand software with high degree of intelligence, or have extensive experience in the designers. 2, the modular design structure From the perspective of planning products : definition of design tasks to the functional structure-based products, Th
5、e product has been used solutions (such as common parts and components, etc.) to describe the design task, That the decomposition of tasks on each task to consider whether there are corresponding to the product solution, so that in the product planning stage design tasks to eliminate potential confl
6、icts, early production forecasts, costs, and the development of the design process of adjustment, which can improve design efficiency and reliability, while also reducing the cost of new product. Feldmann will describe the design of the function of the product mix is divided into four tiers, (1) Pro
7、duct (2) functional components (3) major functional components (4) functional components. And using application-oriented features of the directory structure, the functional components for more specific qualitative and quantitative description. Meanwhile developed products suited to the development o
8、f an early design stage and the use of the software tools STRAT. That the majority of machinery specialized functions can be used existing product solutions, and with the new solution is only a small number of special features, Therefore, the exclusive use of mechanical design functions of the produ
9、ct mix, machinery specialized for the evaluation of the design, manufacturing risks are very favorable. Promotion of the product function on the basis of the analysis, will be divided into products with a particular function in one or several of the basic modular structure, through options and combi
10、nations of these basic modular structure formed into different products. These basic structures can be parts, components, or even a system. Ideal modular structure should have a standardized interface (Department of connectivity and tie), and is serialized, and generalized, integrated, hierarchical,
11、 flexible, economy, interchangeability is, compatibility and relevance. Chinas combination of software component technology and CAD technology, design and deformation of composite design combined according to the classification modular theory, machine processing center will be divided into small and
12、 product level, component level, component level and component level, and the use of expert knowledge and technology to their CAD portfolio into different varieties, the functional module specifications, by the combination of these functional modules into different processing center overall program.
13、 The design for the directory as a choice variation mechanical structure tools, design elements for the solution of integrity, Structure of the organization formed Solution Set design catalog. And the solution set design directory listed a comment on each of Additional Information Solutions, is very
14、 conducive to the solution design engineers to choose elements. According to the mechanical parts connectivity features, be grouped into four types : 1) direct inter-positioning components, and self-adjustment of components; 2) structure common to the assembly; 3) having a nested structure and neste
15、d components connectivity; 4) modular structure with modular components and connectivity. And the potential use of symbols said typical components and the connecting element rules, This realization of the connection between the components of the algorithm and the concept of visualization.Mechanical
16、systems during the design, the functional establishment of a module to function decomposition, and a functional decomposition of the best pills with the degree of functional institutions type correspondence. Structure establishment of a module, as a functional solution of choice in order to achieve mapping algorithm. 2, the characteristics of knowledge-based Product design knowledge-based product design characteristics of the main features : using computers t
