In product collaborative environments, too much design knowledge may reduce the knowledge push accuracy, which results in inefficiency in designers to obtain knowledge. Aiming at this problem, the paper puts forward the method of product collaborative design based on ontology knowledge push. First of all, through the analysis of the knowledge of the product collaborative design process, the paper constructs the knowledge push framework, then sets up the design knowledge ontology model, and finally based on the ontology model, realizes accurate knowledge push in the product collaborative environment.%针对产品协同环境下的设计知识数量过多，知识推送精确度不高，从而造成的设计人员获取知识效率低下，本文提出了基于本体的产品协同设计知识推送方法。首先，通过分析产品协同设计过程的知识活动，构建知识推送框架；然后建立设计知识本体模型；最后在本体模型基础上，实现产品协同环境下的知识精确推送。
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