装配误差传递建模及其精度可靠性评估

发布时间：2018-05-14 03:35

本文选题：零件内误差 + 配合面误差　；参考：《中国机械工程》2017年19期

【摘要】：研究了刚体零件的装配误差建模以及装配精度可靠性评估方法。将零件误差分成位置误差和方向误差,并采用误差矢量加以描述。综合考虑尺寸误差和形位误差,将装配过程误差分成零件内误差和配合面误差,给出主动配合面和被动配合面的定义。针对典型配合面类型,分析误差组成及其计算方法。采用位姿变换矩阵法建立装配误差模型,分析误差在零件内部以及配合面间的传递过程,计算装配总误差并据此确定装配误差的概率分布。给出装配精度可靠度的定义,通过仿真获得装配精度的可靠度指标。以某测量平台的装配过程为例,完成装配过程误差分析和装配精度可靠度评估,验证模型的有效性。
[Abstract]:The assembly error modeling of rigid parts and the reliability evaluation method of assembly accuracy are studied. The part error is divided into position error and direction error, and the error vector is used to describe the error. Considering the dimension error and the shape and position error, the errors of assembly process are divided into the inner part error and the matching surface error, and the definitions of the active matching surface and the passive matching surface are given. According to the type of typical matching surface, the error composition and its calculation method are analyzed. The assembly error model is established by using the position and pose transformation matrix method. The transfer process of the error within the parts and between the matching planes is analyzed. The total assembly error is calculated and the probability distribution of the assembly error is determined accordingly. The definition of assembly precision reliability is given, and the reliability index of assembly accuracy is obtained by simulation. Taking the assembly process of a measuring platform as an example, the error analysis of assembly process and the reliability evaluation of assembly accuracy are completed to verify the validity of the model.
【作者单位】：东南大学机械工程学院;
【基金】：国家自然科学基金资助项目(71671035) 国防基础科研计划资助项目(JCKY2016210C007)
【分类号】：TH161.7

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