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Process design largely determine the parts processing efficiency, cost and quality. The process design is the design of the product manufacturing process, the result is a process flow of each of the processing parts, It defines processing routes, methods, equipment, and process parameters. Manufacturing process modeling is based on the discrete process data, a process model to reflect the behavior and characteristics of the manufacturing process, it is the premise of the manufacturing process simulation and analysis. Manufacturing process model expressed both complete process design content and intuitive description of the parts of the manufacturing process, and technology personnel to provide the basis of innovative design and program analysis. Manufacturing process simulation is based on the process model to analyze the behavior of the manufacturing process, solving the effect of the manufacturing process, the evaluation of the characteristics of the manufacturing process simulation method. At present, domestic and foreign research yet. Around the modeling and simulation of manufacturing processes, this paper, complete the following aspects: ① process of first-order predicate logic method. Discusses the composition of the content of the first-order predicate logic and rules, the process of establishing a first-order predicate logic representation and application process, the formation process of the first-order predicate logic specification expressions, predicate logic reasoning process modeling antecedent . (2) manufacturing process modeling method. Modeling of hierarchical processing methods. The content of the composition of the unit model, sub (layer) model, the structure of the process model, and the process model, the modeling process. Predicate logic reasoning after pieces of the rules and methods of modeling and process model. Theoretically proved that the the unambiguous modeling method, no repeatability and completeness. At the same time, given the instance of the application process modeling methods. According to the process of first-order predicate logic expressions, driven automatic modeling process. ③ manufacturing process simulation method. Discusses in detail the production time, process, and a random process sequence-based manufacturing process simulation method, gives the calculation of the manufacturing process behavior, the evaluation methods and processes. According to the simulation results, the examples discussed the analysis method and process of the manufacturing process characteristics. A brief description of the process of manufacturing process optimization method based on the Hopfield neural network applications. Calculation of the manufacturing process, analysis, complete simulation of the evaluation process, to achieve solving and expression of the behavior and characteristics of the manufacturing process. (4) design information extraction and system development and integration. Briefly discusses the design of information the DXF extraction method. System development framework structure, function, development tools, and based on the DLL, COM component technology systems integration approach. The manufacturing process model dynamic expression of the behavior and characteristics of the manufacturing process, and provide the basis for improvement and innovation process design, process design and production systems connected automatically process modeling, process-driven. The complete manufacturing process modeling and simulation methods, and gives the corresponding application examples and the system development.
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