机械科学与技术2018，Vol.37Issue(1)：70-75,6.DOI:10.13433/j.cnki.1003-8728.2018.0111
机床基础大件支撑预变形设计方法研究
Research on Design Methodology for Support Pre-deformation of Large Machine Tools Body
摘要
Abstract
Aiming at the geometric error induced by guide surface deformation in precision machine tools assembly process,an idea of deformation pre-elimination is proposed.The final guide surface deformation after assembly can be obtained by the static analysis of the machine tools.Through the reproduction of the deformation in support state,it can be eliminated in advance.A precision horizontal machine center was taken as an example to elaborate this method,the key point of this method is to obtain the final deformation of guide surface in support state.Taking the position dimensions as the variables,a neural network was constructed with the samples which were chosen by the orthogonal experiment,and genetic algorithm was used to get the best locations of the supports,so the surfaces of guides can present the target deformation.The results show that using the optimized support,the static deformation of the guide surface and the target deformation present the same shape and the maximum deformation,which are 7.982 8 μm and 8.2 μm,respectively.The error between them is only 0.21 μm,which denotes that the optimization has good effect.关键词
精密机床/导轨基面变形/预变形/支撑优化Key words
machine tools/guide error/pre-deformation/supports optimization分类
机械制造引用本文复制引用
何改云,李素乾,郭龙真,张大卫..机床基础大件支撑预变形设计方法研究[J].机械科学与技术,2018,37(1):70-75,6.基金项目
“高档数控机床与基础制造装配”科技重大专项(2015ZX04005001)资助 （2015ZX04005001）
