Study And Development Of The CAD System For Precision Progressive Die Based On SolidWorks

The design method, characteristic of progressive die of lead frame and the redeveloping way based on SolidWorks are studied. Combining with the practical requirement, a precision progressive die CAD System (PPDCS) for IC lead frame is researched and developed. Eight chapters are included in this dissertation.In chapter 1, some key technologies in relation to progressiv die CAD are discussed and compared. The significance of this research is pointed out and the main contents of this dissertation are summarized.In chapter 2, based on the definition and characteristic of progressive die, the design procedure, including flat pattern geometry, force calculations, strip layout, die constructions design, die components design, drawing generation, is concluded.In chapter 3, the functions of PPDCS are analyzed at first. Then, based on IDEFO method, the function model of PPDCS is built up. At last, the structure and run-flow of PPDCS is given, and the methods adopted in the modules are discussed.In chapter 4, based on the flow chart of process plan, the detailed design of PPDCS, such as feature modeling, blank layout, strip layout and point design, is accomplished.In chapter 5, the significance of the progressive die structure design is summarized, the necessity and available way that can improve its efficiency and flexibility is also discussed. After studying the key technology of structure design in PPDCS and the realization of top-down design, the constructions design module is developed successfully.In chapter 6, a concise, practical and visualized idea is proposed for establishing the 3D database of the standard part. Based on the introduction of the SolidWorks and its functions, the parameterized establishment process and application method of the standard-part database are described. And the successful application of the standard part database in PPDCS is introduced.In chapter 7, based on PPDCS, a practical part design process is demonstrated.In the last chapter, the main results of this dissertation are summarized, and the further study is put forward.