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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

  

  1. (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)
  • 出版日期:2020-08-31 发布日期:2020-08-22
  • 基金资助:
    国防基础科研基金(B0720060844)

Dimensional completeness check and analytical technology of 3D MBD model

  1. (1. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu 212003, China;
    2. Jiangsu Provincial Key Laboratory of Advanced Manufacturing of Machinery and Equipment, Zhenjiang Jiangsu 212003, China)
  • Online:2020-08-31 Published:2020-08-22
  • Supported by:
    National Defense Basic Scientific Research Foundation (B0720060844)

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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。

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

Abstract: 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.

Key words: model-based 3D definition, product manufacturing information, dimensioning, completeness
check, dimensional chain analysis