双重公差原则同轴度误差评定的不确定度研究  

Study on Uncertainty Based on Double Tolerance Principle Coaxiality Error Evaluation

作　　者：孙永厚[1] 杨盛宇[1] 唐哲敏 黄美发[1] SUN Yong-hou;YANG Sheng-yu;TANG Zhe-min;HUANG Mei-fa(School of Mechanical and Electrical Engineering Guilin University of Electronic Technology,Guangxi Guilin541004,China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《机械设计与制造》2021年第1期114-119,124,共7页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51765012):基于本体的公差指标自动生成方法研究;广西研究生教育创新计划资助项目(YCBZ2017049):基于有公差原则的公差评定及不确定度分析方法研究。

摘　　要：为了全面地分析影响产品合格性的可能因素,使零件在满足可装配性的情况下降低加工成本,基于双重公差原则同轴度误差评定方法,对零件的依从不确定度进行了研究。根据规范不确定度的定义,充分考虑其组成因素中的提取、拟合和滤波规范,通过极差法求得相应的规范不确定度分量,并合成规范不确定度;采用正交设计的方法,根据优化后的测量方法评定方法不确定度;借助不确定度的黑箱模型,计算执行不确定度分量;最后将上述三种不确定度合成依从不确定度,并进行了实例验证。实验结果表明,该方法可以更全面地分析影响产品合格性的可能因素,从而提高产品检验的合格率,降低其加工成本。In order to analyze the possible factors affecting the product qualification comprehensively and reduce the conversion cost of the parts under the condition that the assemblability is satisfied,based on the coaxial error evaluation method of double tolerances principle,the compliance uncertainty of the parts is studied.According to the definition of specification uncertainty,extraction,association and filtration specification of its constituent factors are fully considered,the corresponding specification uncertainty components are obtained by the range method,and the specification uncertainty is combined;The orthogonal design method is used,the method uncertainty is evaluated according to the optimized measurement method;Implementation uncertainty components are calculated with the help of black-box model of uncertainty;Finally,the above three kinds of uncertainties are combined to the compliance uncertainty,and an example verification is given.The experimental results show that this method can more comprehensively analyze the possible factors affecting the product qualification,thus increasing the qualified rate of product test and reducing its conversion cost.

关 键 词：依从不确定度 双重公差原则 同轴度 正交试验 滤波 

分 类 号：TH16[机械工程—机械制造及自动化] TB92[一般工业技术—计量学]