基于模型的数字化定义技术以三维产品模型为基础,集成了三维空间尺寸公差标注和制造要求标注在内的特征信息,在脱离了二维工程图纸应用的情况下,实现对产品特征描述、共享,满足信息系统的直接传递要求,并实现对产品信息的分类管理。结合我国787飞机转包生产,分析了基于模型的定义技术的应用情况。 Based on the 3D product model, the model-based digital definition technology integrates the feature information of three-dimensional space dimension tolerance marking and manufacturing requirements annotation. Without the application of 2D engineering drawings, the digital definition technology realizes the product feature description, sharing, Meet the direct delivery requirements of information systems, and to achieve the classification of product information management. Combined with China’s 787 aircraft subcontract production, analysis of the application of the definition of model-based technology.