基于分子动力学仿真的微纳铣削加工研究  

Micro/Nano Milling Based on Molecular Dynamics Simulation

作　　者：贡宣洋 施飞[1] 孟津津 程晓民[1] GONG Xuanyang;SHI Fei;MENG Jinjin;CHENG Xiaomin(School of Mechanical and Automotive Engineering,Ningbo University of Technology,Ningbo 315211,China)

机构地区：[1]宁波工程学院机械与汽车工程学院,浙江宁波315211

出　　处：《宁波工程学院学报》2023年第4期10-16,共7页Journal of Ningbo University of Technology

基　　金：宁波市“科技创新2025”重大专项项目(2022Z047,2022Z071,2023Z032)。

摘　　要：为研究微纳铣削加工后的刀具表面粗糙度,基于分子动力学原理,建立微纳铣削加工过程的数值模型,模拟了微纳铣削加工过程,并对仿真结果进行了分析。模拟结果表明:刀具加工量由0.3804 nm增加至1.9804 nm,刀具下非晶态厚度增至3 nm,加工表面变得粗糙;主轴旋转周期由15 ps减小至2 ps,刀具下非晶态厚度逐渐减薄至0.5 nm,加工表面质量变好;切削速度由1 nm/ps增加至3 nm/ps,刀具下非晶态厚度增加至4 nm,加工表面质量也越来越差。综合分析可知:在微纳铣削工艺参数中,刀具切削速度对加工表面粗糙度的影响最大,其次是加工量,最后是刀具主轴转速的影响。To study the surface roughness of cutting tools after micro/nano milling processing,the numerical model for the research on surface roughness was established based on the molecular dynamics,the virtual Micro/Nano milling process simulated and the machined surface roughness analyzed.The results showed that the machining amount of the tool increases from 0.3804 nm to 1.9804 nm,and the thickness of the amorphous state below the tool rises to 3 nm,which resulting in rough machining surfaces.Besides,the spindle rotation cycle reduces from 15 ps to 2 ps,and the thickness of the amorphous state under the tool gradually decreases to 0.5 nm,which results in the improved surface quality during machining.The cutting speed increases from 1 nm/ps to 3 nm/ps,and the amorphous thickness under the tool increases to 4 nm,yet the surface quality during machining is poorer than that before.The analysis indicates that the cutting speed has the greatest impact on surface roughness among Micro/Nano milling parameters,followed by machining allowances and finally spindle speed.

关 键 词：分子动力学 微纳铣削 数值模拟 

分 类 号：TH162[机械工程—机械制造及自动化]