航空学报 > 2014, Vol. 35 Issue (6): 1740-1749   doi: 10.7527/S1000-6893.2013.0418

工程尺寸驱动原理的完善及其在公差分析中的应用

孟飙, 王勃   

  1. 沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室, 辽宁 沈阳 110136
  • 收稿日期:2013-07-18 修回日期:2013-10-12 出版日期:2014-06-25 发布日期:2013-10-30
  • 通讯作者: 孟飙,Tel.:024-88795083 E-mail:biao_m@sina.com E-mail:biao_m@sina.com
  • 作者简介:孟飙男,副教授。主要研究方向:CAD/飞机装配工艺仿真/CAM/3D-CAPP、PDM/PLM、MES系统、先进制造。Tel:024-88795083 E-mail:biao_m@sina.com王勃男,博士研究生。主要研究方向:先进制造技术。 E-mail:aplser2002@163.com
  • 基金资助:

    中航工业产学研创新基金(CXY2010SH28);总装某预研项目(513180102)

Improvement of Engineering Dimension Driving Principle and Its Application to Tolerance Analysis

MENG Biao, WANG Bo   

  1. Key Laboratory of Aeronautical Digital Manufacturing Processes, Fundamental Science for National Defense, Shenyang Aerospace University, Shenyang 110136, China
  • Received:2013-07-18 Revised:2013-10-12 Online:2014-06-25 Published:2013-10-30
  • Supported by:

    Industry-university-research Innovation Fund of AVIC (CXY2010SH28); A Pre-research Project of The General Amament Department (513180102)

摘要:

目前,工程尺寸驱动原理尚未涵盖三维模型中的隐式约束与几何约束,故公差尺素链分析法(GECM)的应用受到一定的限制。为此,本文对工程尺寸驱动原理进行了完善,并建立了面向虚约束模型(VCM)的公差分析方法。首先,分析工程尺寸不可驱动的原因,建立建模参数集可驱动工程尺寸集的充分必要条件;其次,针对工程尺寸不可驱动的模型,提出产品虚约束模型,给出虚约束模型的构建方法,并构造虚约束模型的公差分析算法;最后,通过实例测试,验证本文所提模型的正确性和算法的有效性。

关键词: 模型, 约束理论, 配合与公差, 尺寸链, 尺寸驱动

Abstract:

Currently, geometrical and implicit constraints cannot be driven with the functional dimension driving theory, which limits the application of the geometrical element chain method (GECM). To solve this problem, this paper presents a modification of the functional dimension driving theory and constructs an algorithm of tolerance analysis oriented to the virtual constraint model (VCM) to extend the application scope of GECM. Firstly, the causes are analyzed for the driving failure of the functional dimensions, and the necessary and sufficient conditions are given for the existence of the mapping relationship. Secondly, the concept of VCM is put forward for the models in which the functional dimension driving principle doesn't work, and the tolerance analysis algorithm of the VCM is constructed. Finally, an example is given to illustrate the validity of the VCM and the effectiveness of the algorithm in this paper.

Key words: models, constraint theory, fits and tolerances, dimension chain, dimension driving

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