Coupling evaluation for material removal and thermal control on precision milling machine tools  

作　　者：Kexu LAI Huajun CAO Hongcheng LI Benjie LI Disheng HUANG 

机构地区：[1]State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400044,China [2]School of Advanced Manufacturing Engineering,Chongqing University of Posts and Telecommunication,Chongqing 400065,China [3]College of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China

出　　处：《Frontiers of Mechanical Engineering》2022年第1期70-82,共13页机械工程前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.51975076 and 52105533)。

摘　　要：Machine tools are one of the most representative machining systems in manufacturing.The energy consumption of machine tools has been a research hotspot and frontier for green low-carbon manufacturing.However,previous research merely regarded the material removal(MR)energy as useful energy consumption and ignored the useful energy consumed by thermal control(TC)for maintaining internal thermal stability and machining accuracy.In pursuit of energy-efficient,high-precision machining,more attention should be paid to the energy consumption of TC and the coupling relationship between MR and TC.Hence,the cutting energy efficiency model considering the coupling relationship is established based on the law of conservation of energy.An index of energy consumption ratio of TC is proposed to characterize its effect on total energy usage.Furthermore,the heat characteristics are analyzed,which can be adopted to represent machining accuracy.Experimental study indicates that TC is the main energy-consuming process of the precision milling machine tool,which overwhelms the energy consumption of MR.The forced cooling mode of TC results in a 7%reduction in cutting energy efficiency.Regression analysis shows that heat dissipation positively contributes 54.1%to machining accuracy,whereas heat generation negatively contributes 45.9%.This paper reveals the coupling effect of MR and TC on energy efficiency and machining accuracy.It can provide a foundation for energyefficient,high-precision machining of machine tools.

关 键 词：machine tools cutting energy efficiency thermal stability machining accuracy coupling evaluation 

分 类 号：TG502[金属学及工艺—金属切削加工及机床]