加工误差和变形作用下的误差传递模型研究  

Research on error transmission model of machining and deformation error

作　　者：张喜庆 张爱梅[1] ZHANG Xiqing;ZHANG Aimei(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001

出　　处：《现代制造工程》2021年第12期74-78,共5页Modern Manufacturing Engineering

基　　金：河南省科技厅项目(181200210100)。

摘　　要：针对零件加工误差和变形误差对装配误差的耦合影响问题,研究了一种采用小位移旋量(Small Displacement Torsors,SDT)、齐次坐标变换理论建立的包含零件加工误差和变形误差的装配误差传递模型。首先,分析了两零件配合时由于零件加工误差和变形误差造成的装配误差。其次,对零件配合面点云数据和ANSYS分析的变形节点数据进行拟合。最后,采用SDT和齐次坐标变换理论建立装配误差传递模型。结果表明,通过该模型计算出的装配误差与真实装配情况一致,为误差控制、装配体末端误差预测以及关键误差源的识别提供了理论基础。To address the coupling effect of part machining error and deformation error on assembly error,an assembly error transmission model including machining error and deformation error was established by using Small Displacement Torsors(SDT)and homogeneous coordinate transformation theory.Firstly,the assembly error caused by the machining error and deformation error of the parts when the two parts mated was analyzed.Secondly,the part mating surface point cloud data and the deformation node data from ANSYS analysis were fitted.Finally,the assembly error transmission model was established by SDT and homogeneous coordinate transformation theory.The results show that the assembly error calculated by the model is consistent with the real assembly situation.It provides a theoretical basis for error control,error prediction and identification of key error sources.

关 键 词：装配误差 小位移旋量 齐次坐标变换 误差传递模型 

分 类 号：TH161.7[机械工程—机械制造及自动化] TG95[金属学及工艺—钳工工艺]