基于知识的集成化机械零件DFM方法研究

研究基于知识的集成化零件ＤＦＭ方法。基于面向对象技术，采用框架和规则混合方式，表达可制造性评价知识，建立了零件可制造性评价体系和评价知识库。采用分层递阶的零件可制造性评价策略，在零件设计过程中，基于制造知识，对零件可制造性分阶段地进行评价与反馈，提供零件设计修改的反馈信息，从而指导产品设计。基于集成产品模型，通过ＳＴＥＰ文件，ＤＲＭ系统直接获取ＣＡＤ中的零件设计信息，自动进行评价与反馈，实现了ＣＡＤ／ＤＦＭ的信息共享和信息集成。

Study on knowledge-based integrated design for manufacture of mechanical parts

This paper describes the approach of knowledge based integrated design for manufacture for mechanical parts. The evaluation knowledge of part manufacturability was expressed by the hybrid of frame and production rule based on object oriented approach. The evaluation system of part manuafcturability and the knowledge base of manufacturability evaluation for parts were built. The hierarchical evaluation strategy of part manufacturability was presented. Part manufacturability was evaluated hierarchically based on manufacturing knowledge in the process of part design, so the feedback information of part design was provided in order to modify part design in time. DFM system can get directly the design information of parts from CAD system based on integrated product model by means of STEP file and evaluate automatically the manufacturability of parts. The information integration of CAD/DFM is implemented.