| The research and development of the progressive die CAD system had a profound significance in improving die lifetime, the productivity and the production quality. Through inquiring the references at home and abroad, the statistics on the study status of the progressive die CAD system were conducted. Then the design goal could be realized through the right platform and the development language.The content of this study design was to realize the intelligence on the progressive die design and the forming simulation to the sheet metal. The intelligent design was based on seamless integration through the object-oriented design development software Visual C++ 6.0 and 3D design software Pro/ENGINEER Wildfire 2.0, and then a set of progressive die CAD system in the integration of parameterized design modeling, assembly and analysis was developed. Based on Pro/ENGINEER, its own secondary development software Pro/TOOLKIT and MFC technology were used to develop user interface by DLL dynamic link, and the access between Pro/e and the database was realized by Visual C++. The sheet metal library, formwork library, nonstandard parts and standard parts library were established by Microsoft Access 2003, and then through the ODBC the MFC and Access 2003 were linked to facilitate the management and query to the parts and data. Sheet metal forming simulation was to use the ANSYS/LS-DYNA for quasi static analysis on sheet metal and do the research about the influence of the bending radius on the quality of the material, and then the results were showed by LS-PREPOST, and the stress-strain diagram were also presented. At last, the rationality of the mould structure and the rationality of the sheet metal formability were examined.This system was made up of five modules:product input module, layout design module, process calculation module, mold design module and engineering diagram output module. In the product input module, the size of the parts could be changed conveniently according to customer request. In the layout design module, different layout modes were provided for users to choose. In the engineering drawing output module,3D and 2D models of the assembly drawing and parts diagram could easily be obtained. Due to the parametric model and the whole correlation of Pro/ENGINEER, when a parameter was changed, the assembly drawing models were also changed, and so the blanking die design efficiency was improved.When using ANSYS/LS-DYNA for the forming simulation, a comparative analysis was done according to different bending radius, and get the forming process of stress and strain change trend. |
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