Key Technologies Of Product Rapid Response Design For MC

When implementing the rapid response to customer requirements for MC (Mass Customization), the traditional design method has become insufficient to satisfy the design demand of an enterprise. A new design method must be developed to support the DFMC (Design of Mass Customization) process. The rapid response design is described through modern design techniques such as generalized parametric design, CBR (Case-Based Reasoning), FEA (Finite Element Analysis), PDM (Product Data Management). Firstly, a generalized parametric and variant design system based on CBR is proposed. Then a variant model is evaluated through the static and dynamic analysis with FEM (Finite Element Method). Finally, the case which is satisfied the design demand is put into PDM system for the follow-up design and thus the rapid response design is accomplished.The object-oriented programming methods based on the VC++ and UG system platform are used to develop the generalized parametric and variant design system based on CBR. In this system, the intelligentization of the conceptual design of machine tool product is achieved by CBR technology, secondary development technology based on UG, function-structure mapping of product, the parameterization of 3-D modeling technology and database technology. The system is mainly made up of two parts: the parametric module and the CBR module. The parametric module is built according to existing products. The product model is packed for some key parameters through the function-structure mapping of product, parameter analysis and correlation, constraint treatment. In order to construct the 3-D parametric model, the object-oriented programming method is used to conduct the secondary development based on UG , and the dimension driving of key parameters is used to update the model. In the CBR module, the object-oriented programming method is used for case representation according to case attributes. The similarity degree is calculated and similar products are retrieved by means of Nearest-Neighbor method. Generalized parametric technology is used to modify the case. Then the case property-value and the case model are saved separately. The model which is created by the variant design system is evaluated through FEA. In order to utilize the CAD model resources, the HyperMesh is used in combination with the ANSYS. Firstly, the CAD model is converted into the finite element model. Secondly, the finite element pre-treatment process involving the simplification of model, definition of material property, meshing technique and load application is completed in the HyperMesh. In the end, the finite element model is imported into the ANSYS for solution, and the results will be applied to the feedback of the design.The model of conceptual design which meets the design requirements is managed by PDM. Firstly, the coding technology is used for the management of model saving and previewing. Then the PDM's management of the 3-D model and the finite element model is discussed respectively. Meanwhile, the workflow management between design and analysis is proposed. Finally, in order to support the entire process of product design, other management in the process of the design is also illustrated.In the end, the accomplishment of the whole system's applications and process is explained through the design case of a CNC machine tool.