微量润滑工况下纳米粒子协同微织构对刀具切削性能的影响  

Synergistic Effect of Nano Particles and Micro-texture on Tool Cutting Performance under Micro Lubrication Conditions

作　　者：刘朝伟 杨发展 姜芙林 黄珂 杨宇 赵烁 隋潇斌 LIU Zhaowei;YANG Fazhan;JIANG Fuin;HUANG Ke;YANG Yu;ZHAO Shuo;SUI Xiaobin(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China;Key Laboratory of Industrial Fluid Energy Conservation and Pollution Control,Ministry of Education,Shandong Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520 [2]工业流体节能与污染控制教育部重点实验室,山东青岛266520

出　　处：《表面技术》2024年第10期183-195,共13页Surface Technology

基　　金：山东省自然科学基金(ZR2022ME081)。

摘　　要：目的探究微量润滑工况下纳米粒子与织构协同作用对刀具切削性能的影响及其变化规律。方法通过有限元数值模拟软件ABAQUS对不同工况下刀具的等效塑性应变、等效应力以及切削力的变化进行仿真和预测评估。同时,通过切削试验进行验证分析,并结合刀具前刀面的磨损状态、前刀面磨损区主要元素含量、切屑形貌及其变化以及已加工表面质量对刀具的切削性能进行综合评价,以探究纳米粒子与织构刀具的协同作用对刀具切削性能的影响机制。结果仿真结果表明,N-O-M切屑的等效塑性应变较小,切屑层较薄,与N-O-T相比,最大等效应力值降低了26.4%,平均切削力为232N,刀具减摩效果最为明显;不同工况下平均切削力误差均控制在10%以内,试验值与仿真值高度一致;N-O-M磨损面积仅为1.95×10^(-2) mm^(2),刀具表面无明显的黏结物和崩刃现象,磨损面积仅为N-O-T的39.8%;N-O-M切屑卷曲半径最小,已加工工件表面脊线较长,工件表面质量较优。结论微量润滑工况下纳米粒子与表面织构的协同作用对提高刀具切削加工性能具有重要意义。微液滴在一定的压力下能渗入刀-屑界面接触区形成液膜,织构沟槽中的纳米粒子随着液膜中润滑介质的流动能够周期性释放到摩擦副的接触表面,持续作用于切削区域改变原有的摩擦接触状态和润滑方式,促进摩擦副间摩擦形式由滑动摩擦向滚动摩擦状态转变,实现减摩降磨的目标。To investigate the synergistic effect of nano particles and texture on the cutting performance and mechanism of YG8 hard alloy cutting tools under micro lubrication conditions,the work aims to adopt ABAQUS numerical simulation software to simulate different working conditions by changing the friction coefficient and convective heat transfer coefficient of tool chip contact.The equivalent plastic strain value,equivalent stress value,and cutting force changes of the workpiece under different working conditions were evaluated and predicted.At the same time,cutting force experiments were conducted on the micro lubrication turning platform to verify the cutting performance of tools.By calculating the wear area of the tool rack face and combining the main element content of the rack face wear area,the chip morphology and its change pattern,and the quality of the processed surface,the cutting processing performance of the tool was comprehensively evaluated,and the mechanism of the synergistic behavior between nano particles and texture was explored.The ABAQUS simulation results showed that compared to N-O-T,the chip layer generated by N-O-M was thinner and the equivalent plastic strain was smaller,with the maximum equivalent stress value of 1.36×103 MPa,reduced by 26.4%and the average cutting force of 232 N,reduced by 39.5%,and the tool friction and wear reduction effect was significantly improved.There was a high degree of consistency between the experimental and simulated values of average cutting force under different cutting conditions.Among them,the minimum wear area of N-O-M was only 1.95×10^(-2) mm^(2),with the wear area of 39.8%of N-O-T and the material exhibited less adhesion and chipping behavior.N-O-M formed the excellent chip morphology with a smaller curling radius,no obvious burrs on the chip end face,and no obvious scratches on the free surface,the distribution type of the processed surface ridges was slender,the adhesion form of the material changed from sheet adhesion to point adhesion,and the surface

关 键 词：微量润滑 纳米粒子 协同作用 微织构 切削性能 减摩降磨 

分 类 号：TG506[金属学及工艺—金属切削加工及机床] TG707