CIMS环境下零件表面数字孪生模型构建方法

Construction Method of Digital Twin Model for Part Surface in CIMS

为了解决CIMS环境下,产品设计、工艺规划、质量检验等不同环节对多元素、多尺度、多层次零件表面质量信息的应用需求,提出一种基于数字孪生的表面综合质量信息模型构建方法。以数字孪生技术的应用准则为基础,采用面向对象的建模方法创建了包含设计几何模型、表面质量模型和表面性能模型的数字孪生表面模型,为多指标综合表征零件表面质量提供一种参考。其次,研究了数字孪生表面信息模型信息的表达与管理方法,实现几何模型与表面质量信息关联式的表达与管理,并提出一种基于XML的数字孪生表面信息模型集成应用框架,采用StAX标准编程接口规范来对XML文件进行解析,从而实现孪生数据在不同系统之间的有效传输。最后,以某卫星零件的复合加工工艺为例,构建了该零件的数字孪生模型,结合UOP UB200I金相显微镜、ZeGage Plus三维轮廓仪和西门子PLM系统Teamcenter搭建了CIMS环境,实现了该零件数字孪生表面模型的表达与集成应用,证明了所提方法的可行性和有效性。

In order to solve the application requirements of multi element,multi-scale,and multi-level part surface quality infor-mation in different link such as product design,process planning,and quality inspection in CIMS environment,the method for constructing a comprehensive surface quality information model based on digital twin is proposed.Based on the application crite-ria of digital twin technology,an object-oriented modelling method is used to create a digital twin surface model including de-sign geometry model,surface quality model and surface performance model,which provides a reference for comprehensively char-acterizing the surface quality of parts with multiple indicators.Secondly,the expression and management method of digital twin surface information model are studied;the expression and management of geometric model and surface quality information asso-ciation are realized;an XML-based digital twin surface information model integration application framework is proposed;the ef-fective transmission of twin data between different systems is realized by using StAX standard to analysis the XML file.Finally,a digital twin model of a satellite part is constructed with a UOP UB200I metallurgical microscope,ZeGage Plus 3D profiler and Siemens PLM system Teamcenter to build a CIMS environment for the expression and integration of the digital twin surface model of the part,which proved the feasibility and validity of the proposed method.