数控车床综合热误差建模及工程应用  

Comprehensive thermal error modeling for NC lathe in engineering application

作　　者：孙志超[1] 侯瑞生[1,2] 陶涛[1] 杨军[1] 梅雪松[1] 王新孟[1] 

机构地区：[1]机械制造系统工程国家重点实验室(西安交通大学),西安710049 [2]河北工程大学机电工程学院,河北邯郸056038

出　　处：《哈尔滨工业大学学报》2016年第1期107-113,共7页Journal of Harbin Institute of Technology

基　　金：国家重大科技成果转化项目(HZ01);国家科技重大专项(2012ZX04011022)

摘　　要：针对车床实际工程应用中主轴与进给轴综合误差对工件加工精度产生影响问题,建立包含工件膨胀效应的主轴与进给轴综合热误差模型,并进行实际切削验证.以精密车床为研究对象,综合分析车床主轴、进给轴和工件在实际加工中的相互影响关系,并建立三者之间的综合热误差多元线性回归模型(MLRA).实验结果表明:含有工件膨胀效应系数的综合热误差模型符合实际工况,有效提高了车床的加工精度.主轴热误差模型的预测精度达85%以上,进给轴预测精度达70%以上,实际加工中工件误差由15μm降低到5μm左右.综合热误差模型显著提高了高精密数控车床的加工精度.The coupled thermal error between the spindle and feed shaft could actrually reduce the accuracy of workpieces in prcessing. For the problem, we developed the conprehensive thermal error model of spindle and feed shaft, with the expansion of workpieces, and verified it. The mutual effection among spindle, feed shaft and workpiece were comprehensively analyzed, and the multivariable linear regression model was developed among them. The results show that the comprehensive model could be consistent with lathe＇ s processing situation and increase the processing accuracy effectively. The prediction accuracy for the spindle is more than 85%, and 70% for feed shaft. The error rang in processing is declined from 15μm to 5μm.

关 键 词：数控车床 主轴 进给轴 工件膨胀效应 热误差建模 热误差补偿 

分 类 号：TH161[机械工程—机械制造及自动化] TG532[金属学及工艺—金属切削加工及机床]