Product Model In the previous single machine design, the structural model was expressed in the form of design paper. When designing a new machine, redesign the design paper and construct a new structural model. The functional model and principle model of the machine tool are implicit in the structural model and are not explicitly expressed. In the rapid strain engineering design method, not only the serialized structural model but also the corresponding functional model and principle model should be constructed. New products and variants are designed from the functional model to the principle model to the corresponding structural model.
The functional model is determined based on user requirements. The functional model consists of product functions and sub-functions, expressed in a tree structure. The principle model is the various design conditions, analytical calculation methods, etc. used in the design process, such as the drive calculation and power calculation of the machine tool. Establishing a principle model database is one of the characteristics of rapid strain engineering design. In general, the design principles for satisfying a certain function include the design experience stored in the books, manuals, and designers' brains. In order to realize the automatic generation of the variant design and design, a design principle model database corresponding to the functional model must be established.
The structural model consists of a complete machine assembly model, a component assembly model, and a part model. It can be two-dimensional or three-dimensional, and also uses a tree structure to express the assembly relationship from large to small and from zero to zero. Structural models corresponding to the same principle are serialized and multi-parameter normalized. Serialization is mainly embodied in the structural model. The structural model that is inferred with the functional model and the principle model is stored in the shape database.
Group coding is an important step in rapid strain design for the various models and generic component classification codes stored in the database. The coding principle and method of group technology (GT) is used in the design process of rapid strain. The coding system is determined according to the characteristics of the product family, and its purpose is simple and feasible, and is easy to retrieve. The coding method can adopt international and domestic standards, or it can be created by itself and can be used.
The design and generation program design is divided into two categories, one is the new product development design, and the Other is the variant design of the series machine tool. The design generation program is based on group coding and has intelligent features, especially in the case of variant design, which can automatically generate new design results. The expert system is a human-like intelligent system based on expert knowledge base and reasoning. Since the establishment of a relatively complete expert knowledge base is difficult and time-consuming, and does not have the ability to innovate, it is impossible to completely implement the design with an expert system. Therefore, the preparation of a user-friendly, user-friendly design generation program that is easy for designers to participate in, and the design of human-computer interaction is a very important part of the rapid response engineering design system.
After the design of the new machine tool product adopting some new technologies and new functional components, the new design part will be enriched in the original model library according to different models, and the function and design scope of the design system will be continuously expanded. Rapid strain engineering design of machining center Firstly, according to the principles of serialization, modularization and standardization, the functional modules of the vertical machining center and the functional model, principle model and structural model database and shape library of the structural model product are respectively established. It is a functional model and a principle model tree of a vertical machining center.
Secondly, a structural model corresponding to the functional model and the principle model is established. It is stored in the library in a form and is an assembled structural module. The structural module is in turn composed of submodules and parts. The parts in the assembly are taken from the parts library. The parts library is further divided into a general parts library and a special parts library. Modules and parts are classified and coded and stored according to certain rules. The structural model is a tree structure that corresponds to the functional model and the principle model. For example, the headstock is a functional component module, which in turn consists of sub-function modules such as spindle components, spindle motors, cabinets and accessories.
The design and generation program of the machine tool product is based on the completion of the database and the classification and coding system, and the functions and specifications are configured according to the requirements of the user to determine the corresponding code. Find the corresponding structural configuration based on the code and then generate the machine product design results. If the structural model in the database can meet the requirements, the design ends; otherwise, the principle model should be found according to the functional requirements, and the structural and specification variants should be designed. Intelligent design of human-computer interaction based on expert system is a more suitable method. Especially when developing new products, people often play a key role. designing process.
Conclusion The rapid strain engineering design method is one of the design methods of serialized products. It is an advanced design technology adopted to meet the requirements of fierce market competition, variety of machine tools and rapid changes. Combined with the evolving CAD/CAM technology and virtual manufacturing technology, the design method of machine tools will be greatly changed.
(Finish)
Signal Generator,Electric Generator,Power Generator
Stone Diesel Engine Co., Ltd. , http://www.shdieselengine.com