Based on the research of the basic principle of CBR (Case-based Reasoning), a process planning model based on CBR is founded, the process of CBR and withdrawing cases are determined.
在研究基于实例推理基本原理的基础上，建立了CBR的工艺规划模型，确定了基于实例的推理过程以及实例的提取过程。
According to the openness of process planning knowledge base, this paper proposes a hierarchy knowledge base model based on open structure.
根据工艺设计知识库的开放性要求，提出了一个基于开放式结构的层次化知识库模型。
The drawing items, process planning and NC code will be derived from master model and master document by product variant design. As a result, the design of customized product can be finished rapidly.
通过主模型和主文档进行变型设计，派生出定制产品零部件的工程图、工艺过程规划和NC程序等，达到定制产品快速设计的目的。
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