Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (5): 78-83,89.doi: 10.3969/j.issn.1000-565X.2016.05.012

• Mechanical Engineering • Previous Articles     Next Articles

State Vector Model of Geometry Tolerance and Techniques for Tolerance Analysis and Synthesis

LIU Wei-dong1 TU Yu-ting2 LIU Hai-ming1   

  1. 1.School of Automation Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Guangdong Academy of Agricultural Science，Guangzhou 510640,Guangdong,China
  • Received:2015-10-19 Revised:2016-03-13 Online:2016-05-25 Published:2016-04-12
  • Contact: 刘伟东(1984-)，男，博士，助理研究员，主要从事智能制造、数字化制造技术下的复杂产品装配精度预分析技术研究． E-mail:aulwd@scut.edu.cn
  • About author:刘伟东(1984-)，男，博士，助理研究员，主要从事智能制造、数字化制造技术下的复杂产品装配精度预分析技术研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China(51305140) and the Science and Technology Planning Project for Industrial High-Technolgoy of Guangdong Province(2014A040401019，2015A030401029，2014A010104004)

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Abstract: As the existing interchangeability design process of part assembly is restricted to the imperfect analysis and synthesis techniques of geometric tolerance,firstly,a state vector model of geometric tolerance is proposed.Secondly,the geometric deviation affection and deviation accumulation are analyzed on the basis of the proposed model,respectively.Then,the state vector expression of assembly deviation affection and accumulation is deduced for the parts in different fitting statuses,and a state equation for the geometric tolerance analysis and synthesis is presented.Finally,an end faces docking example of spacecraft cabins is illustrated to explore the process of geometric tolerance analysis and synthesis with the help of the proposed state equation.Example results show that the proposed state vector model and the corresponding state equation are both effective and applicable for geometric tolerance analysis and synthesis.

Key words: geometric tolerance, state vector model, tolerance analysis, tolerance synthesis, fits and tolerances

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