Construction And Application Of Knowledge-Base In Injection Mold Design Based On Rule Engine

As one of the key means of modern manufacturing production, moulding technology has a vital influence on industrial development. Mould manufacturing is a typical client-oriented customization, by improving product quality, reducing costs and shortening the development cycle will the mould companies win the competition. The core competitiveness of mould enterprise lies in product design and R&D. Viewing the knowledge in design and development process as core assets has led to the appearance of new ideas and technology, companies must learn to manage knowledge through these new technology. Mould and die design is an innovative process, which is mainly dependent upon sufficient experience and knowledge of the designer. It will help improving design efficiency and lowering design errors by refining, managing and reusing knowledge on existence, and finally improve the competitiveness of the mould enterprises. In this thesis, a new approach towards the knowledge gather and reuse of mould and die design is presented, based on new technologies in fields of AI and knowledge features in mould design. The approach is elaborated in detail, and realized under JAVA environment with UG platform.Knowledge based Engineering is one of the new intelligent technology in industry, which is characterized by the combination of the whole product development process, for which to manage and apply the internal knowledge. With this new knowledge-faced technology, this thesis presents a new reuse strategy towards knowledge in injection mold design, from three stages: knowledge collection, representation and reuse build the overall process, and choose the accordingly methods with characteristics of injection mold design knowledge.In first part of this thesis, conventional mould design process and knowledge distribution are analysis, in the case of injection mould. On this basis, the requirements for knowledge representation to establish a knowledge base are specified. And then, a hybrid knowledge representation model is proposed, which takes both advantages of ontology and Topic maps.In second part of this thesis, compositions and representations of rules are introduced, as well as the transfer from design knowledge to rules. Standard parts design knowledge and experience knowledge are raised to explain the transfer in details. After that, an approach based on semantic analysis towards automatically generating the rules is proposed. It helps most rule knowledge transfer to rules. With this method, a rule manage program is designed to manage existing rules integrally.In third part of this thesis, a new rule engine: Drools, is introduced. After in-depth study on the working principle and reasoning mode of the rule engine, a method is introduced to certificating the efficiency of the engine, as well as realizing the reuse of injection mould design knowledge. Finally, with the case of injection mould design of a plastic cradle, and applying the knowledge base and knowledge reuse method, it is certificated that the approach can offer effective help in each stage of injection mould design. The result proves that the method with rule engine helps improving design efficiency, accomplishing the gathering and reuse of knowledge, it is correct and reasonable.