关键词: 注塑模, 加工时间定额, 事例推理, 遗传算法

Abstract: A Case-Based Reasoning (CBR) method，which was introduced to determine the manufacture time quota of injection mould，was put forward. As two key technologies of the method, case retrieval and case modification were focused. To improve the efficiency and accuracy of case retrieval, a Genetic Algorithm (GA) based hierarchy retrieval model was proposed to optimize the feature weights. To improve the accuracy of case modification，a relative value and experience mixed modification strategy was put forward to combine and optimize the evaluation rules. Finally, an example was applied to verify the validity of the method.

Key words: injection mould, manufacture time-quota, case-based reasoning, genetic algorithm