摘要：
A product quotation method was proposed based on 3D geometric features,which utilized researches about the automatic feature recognition and the second development of CAD,aiming at solving problems of high demands on timeliness and diversity of product cases and low efficiency in responding quotations of product example bases in current mainstream quotation systems.First,the common design features were classified,and the mapping relations of machining features,design features and their marks were established.The identification of the design features was accomplished by using the one-to-one image relationship among the feature signs and the design features.The identification of the machining features was realized by combining the image relationship among the design features and the machining features.Secondly,the parts' quotations were studied through the material costs and processing costs,a product quotation model was established by synthesizing the hierarchy of products,components and parts.Thirdly,in order to respond quickly to the individual needs of users,a service model was established from user demands to product configurations to rapid response quotation.Finally,a quotation system was developed based on 3D geometric features of Creo,and applied to an enterprise's high power inverter quotation,which improves the product quotation efficiency and verifies the feasibility of the quotation method based on the 3D geometric features.%针对当前主流报价系统对产品实例库的多样性和时效性要求高且报价响应效率低的问题,在研究自动特征识别技术和CAD二次开发方法的基础上提出了基于三维几何特征的产品报价方法.首先,对常用设计特征进行分类并建立设计特征标识号、设计特征和加工特征间的映像关系,利用特征标识号和设计特征间的一一映像关系完成设计特征的识别,结合设计特征与加工特征的映像关系实现加工特征的识别;其次,通过零件的材料费用和特征加工费用进行零件的报价研究,综合产品、部件及零件的报价层次关系建立产品报价模型;再次,为快速响应用户个性化需求,建立了从用户需求到产品配置再到快速响应报价的服务模型;最后,开发了基于Creo的三维几何特征的报价系统,并将该报价系统应用于某企业大功率逆变器报价中,提高了产品报价效率,验证了基于三维几何特征的产品报价方法的可行性.
