不同种类纳米流体微量润滑铣削钛合金实验评价  

Experimental evaluation of different nanofluids minimum quantity lubrication milling titanium alloy

作　　者：柏秀芳 李长河 董兰[1,2] 殷庆安 黄伟[1,2] 李莉芳[1,2] BAI Xiufang;LI Changhe;DONG Lan;YIN Qingan;HUANG Wei;LI Lifang(Engineering and Technology R&D Center of Mechanical and Electrical in Colleges of Shandong,QingdaoBinhai University,Qingdao 266555,CHN;School of Mechanical and Electrical Engineering,Qingdao BinhaiUniversity,Qingdao,266555,CHN;School of Mechanical Engineering,QingdaoTechnological University,Qingdao 266520,CHN)

机构地区：[1]青岛滨海学院山东省高等学校机电工程技术研发中心,山东青岛266555 [2]青岛滨海学院机电工程学院,山东青岛266555 [3]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《制造技术与机床》2019年第8期91-96,共6页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金资助(51806112);山东省高等学校科技计划项目(J18KA017);山东省高等学校科技计划项目(J17KB016)

摘　　要：以航空航天常用钛合金Ti-6Al-4V作为工件材料,选取纯棉籽油微量润滑和6种不同种类的纳米流体微量润滑进行实验对比,用铣削力,表面粗糙度,工件表面微观形貌,对润滑性能进行实验评价。结果表明:采用纯棉籽油微量润滑时,铣削力最大,为448.6N。添加Al2O3、SiO2纳米粒子在提高基础油的摩擦学性能上表现出了显著的效果,铣削力分别为291.2N和296.5N,比纯棉籽油微量润滑分别减小了35.1%,33.9%。采用纯棉籽油微量润滑时得到的工件表面粗糙度值最大,Ra为1.772μm。添加Al2O3的纳米流体得到的工件表面粗糙度值最小,Ra为0.594μm。六种纳米粒子得到的工件表面粗糙度值的大小关系为:Al2O3<SiO2<MoS2<CNTs<石墨<SiC。Al2O3纳米流体微量润滑条件下得到的工件表面犁沟最小,工件表面质量最好。结合铣削力、表面粗糙度以及和工件表面微观形貌,Al2O3和SiO2纳米粒子更适合作为基础油的添加剂。In the experiment,titanium alloy Ti-6Al-4V usually used in aerospace field was selected as workpiece material,minimum quantity lubrication(MQL)with pure cottonseed oil and MQL with nanoparticles were selected as machining conditions.The lubrication performance was investigated in terms of milling force,surface roughness and morphology of workpiece surface.Experimental results demonstrated that the cutting force under MQL condition was the largest equal to 448.6N,while Al2O3 and SiO2 nanofluids had shown the most significant effect in improving the tribological performance and the cutting force were 291.2N and 296.5N,35.1%,33.9%lower than that of MQL respectively.Furthermore,the surface roughness Ra obtained by adding Al2O3 nanoparticle was the minimum equal to 0.474μm,while it was the maximum by using pure cottonseed oil equal to 1.435μm.The surface roughness of the six nanoparticles was described by the following order:Al2O3<SiO2<MoS 2<CNTs<Graphite<SiC.At the same time,the workpiece surface morphology was also the best for Al2O3 and SiO2.As a result,Al2O3 and SiO2 were more suitable as additives for nanofluids.

关 键 词：铣削 纳米流体 微量润滑 表面微观形貌 

分 类 号：TG547[金属学及工艺—金属切削加工及机床]