机械科学与技术2025，Vol.44Issue(1)：49-58,10.DOI:10.13433/j.cnki.1003-8728.20240161
柔性加工中心定位精度深度误差溯源方法
Depth Error Tracing Method of Positioning Accuracy of Flexible Machining Center
摘要
Abstract
Flexible machining center(FMC)is a new precision manufacturing system.In order to improve the machining accuracy,a depth error tracing method based on error distribution and feature recognition is proposed to accurately trace and identify the key components that affect the geometrical errors of the workpiece,and provide technical support for the subsequent precision design,error prediction and error compensation.Firstly,the mechanical structure of the flexible machining center is analyzed,the transmission process from the geometrical error of the part to the geometrical error of the workpiece is analyzed,and the distribution information of the key error terms is obtained.Secondly,a mathematical model of error transfer is established using error flow theory,and the expression of error probability density function is derived to establish the error distribution mapping relationship between component and workpiece.Finally,in terms of the probability density function operation law,the workpiece error distribution is decoupled to obtain a normal distribution curve with significant characteristics,and the error distribution of the compared parts is fitted to identify the key error terms.The experimental results show that the present method can effectively predict the machining errors,identify the key error sources,and control the geometrical errors by changing components.关键词
误差溯源/误差分布/柔性加工中心/误差流理论Key words
error tracing/error distribution/flexible machining center/theory of variation stream分类
机械制造引用本文复制引用
李臻锋,唐皓,郑煜..柔性加工中心定位精度深度误差溯源方法[J].机械科学与技术,2025,44(1):49-58,10.基金项目
国家自然科学基金项目(52175445)、湖南省自然科学基金项目(2023JJ30256)及湖南省创新型省份建设专项(2023GK2024) （52175445）
