Development On Mould CAD System Of The Key Accessories For Automobile Based On Unigraphics

This thesis is concerned mainly on the project of "Development on CAD/CAM mould design and manufacture technology of the key accessories for automobile", which is an important project of the Guangxi science office. The purpose of this project is to develop a powder metallurgy die CAD/CAM system, runs on Windows2000 platform, and on the basis of software Unigraphics NX 1.0. The following issues are mainly studied and addressed in this thesis:Research was carried out on craft characteristic of powder metallurgy compression forming technology and design principle of powder metallurgy die without finishing operation. Simultaneously, the structure of main forming mould parts such as cavity die, puncher, core rod , and size calculating were detailedly researched. The general process and method of powder metallurgy die design were discussed.According to the designing requirement of the powder metallurgy die CAD system, setting up the overall architecture of the system, establishing the system flow and data stream. Meanwhile, the partition functional modules of the system were finished based on the software engineering technology and IDEFO method.By further investigation on secondary development method of UG, the interface of the system was designed. Based on the design principle of the powder metallurgy die, some systemic modules such as the pressure center module, the calculation module of compacting pressure, the calculation module of forming parts dimension etc. were finished. Besides these, the program structure of the system was set up.At last, the application of the system was introduced through a simple example.