Abstract: To realize the intelligent acquisition of process knowledge in the intelligent generation of machining process,a modelling and management method of process knowledge for intelligent generating of machining process planning was proposed.The basic definitions of the step knowledge unit,the process knowledge unit and the machining process chain were put forward,and the framework structure of modeling and management of machining process knowledge was established.The relationship of process knowledge was expressed by structure model of the process knowledge and the “Concept-attribute-rule” diagram.The process knowledge base was constructed on the basis of process knowledge table corresponding to product object and the correlation model between process knowledge lists.By taking the piston of marine diesel engine as an example,the validity of the modeling and management method of machining process knowledge was verified.

Key words: process knowledge, step knowledge unit, process knowledge unit, modeling, machining process, piston of marine diesel engine

摘要： 为实现机加工艺智能生成要求下工艺知识的智能获取,提出面向机加工艺智能生成的工艺知识建模与管理方法。提出工步元、工序元和加工链的基本定义,并创建了机加工艺知识建模与管理的框架结构;利用工艺知识的结构模型及“概念—属性—规则”图表达工艺知识的关联关系;以产品对象相应的工艺知识列表和工艺知识表间的关联关系模型为理论基础构建了工艺知识库。以船用柴油机活塞为验证对象,验证了机加工工艺知识的建模与管理方法的有效性。

关键词: 工艺知识, 工步元, 工序元, 建模, 机加工艺, 船用柴油机活塞