Research on Template-Based Parameterized Structure Design for Drawing Dies
The structure design of drawing dies is a very compLicated and knowledge-intensive process. This paper describes a template-based parametric design system for drawing dies which adopt template as the die design knowledge base and instantiate it to complete the design of the main components of drawing die. Some key technologies such as the template technology, the parameterization technology and the top-down assembly design technique have been studied. The template for drawing dies is defined by using the "top skeleton" assembly structure, and the associative geometry-driven design and parameter-driven design of dies structure is reaLized by adopting WAVE technique and parameterized design method. The design process of template-based drawing dies structure is estabLished and the rapid design of structure is implemented by applying UG secondary development. At last, effectiveness of our method is verified by some examples.
Study on Modular Design of Trimming Die Structure for Automotive Panels
This paper describes an automated design system for trimming die structure. Considering the complexity of trimming dies, a modular design method was used to define module’s functions and determine the design processes of trimming dies. Through analyzing the relationship of structure and function of trimming dies, the systematic analysis of modularization for trimming dies is achieved from assembly-level division. By using parametric design method, the internal connection between modules is analysis from part-level division, and the module-based design process of complex part is accomplished. The CAD system for trimming dies is developed on platform of UGNX software. The application results show the high efficiency and design flexibility.
Expert systems for metal forming
In this paper some new results are presented on the development of a Knowledge Based Expert Systems for metal forming applications. The system is aimed to be capable of generating feasible process plans for various sheet and bulk metal forming modules. The elaboration of this expert system is based on the principles of group technology. A hybrid component classification system combining both geometrical and technological attributes of the components to be produced is developed to form part families. Utilizing a generative process planning approach feasible process plans can be generated which can further be manipulated by the user interactively. Besides the sequence of operations and the detailed process plans, the system provides the necessary technological and tool design parameters, as well.