面向精密装配的零件形状误差评价参数确定方法

发布时间：2018-03-18 17:12

本文选题：装配精度　切入点：几何误差　出处：《北京理工大学学报》2017年07期 　论文类型：期刊论文

【摘要】：针对传统的以最小包容原则为基础的形状误差评价方法不足以定量描述形状误差分布和装配精度关系的现状,提出了面向装配精度的零件表面形状误差评价参数的确定方法.首先通过分析实际加工表面的检测参数确定非高斯模拟的输入参数,以非高斯平面模拟方法生成切削加工表面,以小波滤波获得表面形状误差,建立并提取能够表征表面形状误差分布的表征参数;将滤波后的表面通过接触点搜索的方法来模拟装配,计算装配后的第二个零件的空间方位变化的分布参数;通过相关分析确定零件形状误差表征参数和装配后零件空间方位分布参数的关系,确定形状误差评价参数,实现表面几何分布表征参数与装配精度关系的定量描述,为优化装配工艺从而提高装配精度提供科学依据.
[Abstract]:In view of the fact that the traditional shape error evaluation method based on the principle of minimum inclusion is not sufficient to quantitatively describe the relationship between shape error distribution and assembly accuracy, This paper presents a method to determine the parameters for evaluating the surface shape error of parts facing the assembly accuracy. Firstly, the input parameters of non-#china_person0# simulation are determined by analyzing the testing parameters of the actual machined surface, and the machined surface is generated by the non-#china_person1# plane simulation method. The surface shape error is obtained by wavelet filtering, and the characterization parameters which can characterize the distribution of surface shape error are established and extracted, and the filtered surface is simulated by the contact point search method. The distribution parameters of spatial azimuth change of the second part after assembly are calculated, and the relationship between the shape error representation parameter of the part and the spatial azimuth distribution parameter of the assembled part is determined through the correlation analysis, and the evaluation parameter of the shape error is determined. The quantitative description of the relationship between surface geometric distribution parameters and assembly accuracy is realized, which provides a scientific basis for optimizing assembly process and improving assembly accuracy.
【作者单位】：北京理工大学机械与车辆学院;
【基金】：国家自然科学基金资助项目(51275049,51375054) 国家“九七三”计划项目(613243)
【分类号】：TH161.7

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