数字化设计与制造三维MBD模型尺寸完备性检查及分析技术研究  

Dimensional completeness check and analytical technology of 3D MBD model

作　　者：张胜文[1,2] 尤炎炎 李滨城 程德俊[1,2] ZHANG Sheng-wen;YOU Yan-yan;LI Bin-cheng;CHENG De-jun(School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212003,China;Jiangsu Provincial Key Laboratory of Advanced Manufacturing of Machinery and Equipment,Zhenjiang Jiangsu 212003,China)

机构地区：[1]江苏科技大学机械工程学院,江苏镇江212003 [2]江苏省船海机械装备先进制造重点实验室,江苏镇江212003

出　　处：《图学学报》2020年第4期599-605,共7页Journal of Graphics

基　　金：国防基础科研基金(B0720060844)。

摘　　要：针对三维基于模型的定义(MBD)技术存在的结构复杂、尺寸标注易出错、人工检查难度大等问题,提出了一种尺寸标注完备性检查及尺寸链分析技术。将空间标注尺寸转换成一系列的矩阵结构,从三维层面上保证模型中尺寸标注的完备性,并在此基础上分析计算尺寸链中各成员尺寸,验证设计尺寸的合理性。运用矩阵的数学形式表达、存储三维MBD模型上的标注尺寸,通过尺寸标注节点位置与数量关系判断尺寸冗余与缺失情况,并从模型上提取待判定尺寸链进行分析与校核,保证产品制造信息(PMI)传递的准确性并输出检查报告。以某型号船用柴油机的连杆为对象验证了该方法的可行性,极大降低了检查时间和设计错误率,提高了工作人员的设计效率。A technology for checking the completeness of dimensioning and analyzing the dimensional chain was proposed to solve problems,such as complicated structure of the 3D model based definition(MBD)model,error-prone dimensioning and the difficulty of manual check.The spatial dimensions were converted into a series of matrices to ensure the completeness of the dimensions at 3D level,based on which the sizes of each member of the dimensional chain were calculated to verify the rationality of the design.Matrix was used to express and store the dimensions on the 3D model and the redundancy and deletion of the dimensions was judged by the position and quantity of dimension nodes.Then the to-be-judged dimensional chain was extracted from the model for analysis and verification to ensure the accuracy of product manufacturing information transmission and an inspection report was produced.The feasibility of the method was verified by using the connecting rod of a certain type of marine diesel engine,which greatly reduced the inspection time and the design error rate and improved the design efficiency of the staff.

关 键 词：三维MBD模型 产品制造信息 尺寸标注 完备性检查 尺寸链分析 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]