Research Of The Quality Control System For Injection Products Based On RBR And CBR

Knowledge indication methodes and reasoning methodes havebeen an urgent need aimed for different applying fields because of thedevelopment of the expert system theory and the increasing using of theexpert system. Rule-based Reasoning (RBR) and Case-based Resonning(CBR) which are methodes used in expert systmes apply in each suitablefields. On the basis of the research on theories of expert system,uncertainty reasoningand case-based resonning, this paper presentstwo knowledge indication methodes and their corresponding reasoningmethods each based on Rule-based uncertainty reasoning andCase-based resonning respectively, these methodes are suitable ininjection fields. The rule-based reasoning is mainly used on the injectionproduct defects diagnosis and the Case-based Resonning is mainlyemployed on the process scheme perfect of the whole injection productmanufacture, which are independent and sustaining each other, anddescribe a prototype RBR and CBR expert system. The main content and key technology in this study is as followings:1. Factors, which affect quality in the molding process of theinjection products, have been analyzed and studied systematically onthe aspects of the kinds of material, design of product, design of mould,kinds of the injection molding machine and injection processparameters setting and so on. In this paper, which provides theoreticbasis for the knowledge base establishment and reasoning means on thissystem.2. The analysis and diagnosis on plastic part defects are carried outon the basis of RBR. After deep study of expert system, this paperintroduces setting-up of knowledge base and design of reasoningmechanism in detail, and the realization of RBR in the research anddiagnosis on plastic part defects has been performed.3. This paper introduces the RBR technique. From the process ofsolving CBR problem, its theory and technology have been discussed,such as case representation, case indexing, case retrieve, case revise,case learning and so on; According to the character of injectionproducts quality control, the establishment and organization andmaintenance of the casebase using the Database technolog has beenperformed. In case retrievaling, similarity algorithm is a key problem,and in the system, the nearest-neighbor is used to resolve this problemcommendably, and the modification of case is present in the paper as well. According to the building of case-based reasoning way, this paperanalyzed and demonstrated the reasoning project of the quality controlfor injection products based on the Case-based Reasoning andimplemented every function module.4. Basing on the above-mentioned research, the models anddevelopment strategy of the quality control system forinjection-molded products on RBR and CBR were put forward, andthe function of each mold was carried out. Its primary function andoperation approaches were mainly introduced by example, and theresult shows the system has a fine help on injection products qualitycontrol.