Fundamental Research On Complex Part's 3-D Process Optimization

With the modern manufacturing requirements of better quality, higher efficiency, low cost and more environment-friendly. Complex parts'manufacturing process are disassembled manufacturing methods, process route planning as well as the cutting parameters, the Global evaluation is set up with the data of local optimization, and a best result is obtained.The background, source and research goal of this project and The difficulty of complex parts'process planning are introduced. The process design and optimization are researched and explored both in theory and practice based on the data which are picked-up from the 3D model,The application of feature technology on modeling and process design is analyzed. By using the geometric surface sets, the feature information, manufacturing datum, location datum etc can be expressed clearly. The process is designed and optimized based on the surface geometric and manufacturing information. By this way, the object of optimization and management of process design based on the unified data model is achieved. An open data management pattern is designed. The resource constraints of the process optimization are auto-set to meet the requirement of optimization.According to the hierarchical strategy, the optimization of process is divided into three parts: the manufacturing method, the process sequence and the manufacturing parameters optimization. First, the manufacturing method is reasoned by the type of the feature, the capability of manufacturing resources and the length of the method chain. Second, the quantitative constraint matrix is formed by the result of the reasoning, the relative geometric and manufacturing information, the sequence of manufacturing contents is optimized which aim is to reduce the time of clamping and changing of the machine. The qualitative, descriptive constraint information are usually unsuitable to used in this procedure, while the constraint which is expressed in the matrix improves the disadvantage and increases the calculate efficiency and stability.The global evaluation is given at last. The qualitative analysis is integrated with quantitative analysis and the object functions are constructed by this way. According to the hierarchical method, the global object is optimized to achieve the global evaluation of process planning and obtained the best result.A dynamic database is designed, with the dynamic and static data, the constraints and basic data are provided.After introducing the prototype, the practicability of the system is testified by a complex part's process design and optimization.