重庆大学学报2017，Vol.40Issue(10)：23-29,7.DOI:10.11835/j.issn.1000-582X.2017.10.003
基于灰色GM(1,4)模型的数控机床热误差补偿技术
Thermal error compensation technology of CNC machine tools based on Grey Model(1, 4)
摘要
Abstract
To reduce the influence of temperature field on the machining accuracy of machine tools,we analyze the heat source composition and the thermal error mechanism in the production process of CNC machine tools,select 4 key points for temperature-measuring from the original 8 temperature-measuring points according to the theory of grey relational degree,and establish a grey (4,1) prediction model.The model builds the mapping relationship between the changes of the 4 key points and the thermal error of machine tools.It can predict the thermal error of machine tools in real time by acquiring the temperature of the key points and then compensate the predicted thermal error to the tool feed position,and thus a machine thermal error compensation mechanism is formed.The precision horizontal machining center experiment THM6380 is taken as the experimental object,the gap between the test results of GM(4,1) model and the actual thermal error value is calculated,and the fitting residual error is within ±1 μm,which shows the fitting effect is good.关键词
数控机床/热误差/灰色关联度/灰色GM(1,4)模型/误差补偿Key words
machine tool/thermal error/grey relational degree/GM(1,4)/error compensation分类
机械制造引用本文复制引用
鞠萍华,黄洛..基于灰色GM(1,4)模型的数控机床热误差补偿技术[J].重庆大学学报,2017,40(10):23-29,7.基金项目
国家自然科学基金(51575070)和国家“高档数控机床与基础制造装备”科技重大专项(2013ZX04011-013,2013ZX04012-041,2014ZX04001-031,2016ZX04004005)资助项目.Supported by the National Natural Science Foundation of China (51575070) and the state key project of "High Grade CNC Machine Tools and Basic Manufacturing Equipment" (2013ZX04011-013,2013ZX04012-041,2014ZX04001-031,2016ZX04004005). （51575070）
