摘要
针对传统封闭式销-盘摩擦磨损试验无法反映实际切削过程中刀具与切屑以及工件界面摩擦磨损问题,设计了一种新的摩擦磨损试验方法,模拟了不同微量润滑(MinimumQuantityLubrication,MQL)工艺参数和油品条件下的AlTiN基刀具涂层切削加工S136淬硬模具钢的摩擦磨损过程,分析了涂层-工件摩擦系数的变化趋势,并结合涂层表面摩擦粘附形貌及摩擦模型,揭示了不同MQL条件对刀具涂层-工件摩擦磨损行为的影响机理。结果表明:界面摩擦系数主要受摩擦粘附的影响,摩擦粘附越严重,对应的界面摩擦系数越大;喷射压力对于界面摩擦系数具有重要影响,喷油量的增加对于摩擦系数的影响不明显,油雾喷射距离为10mm和40mm时对应的摩擦系数均较小;对于AlTiN涂层,采用HE30合成脂类油品更有利于降低界面摩擦系数;对于AlTiN/TiSiN涂层,采用VG25植物基油品和Plus20脂肪醇类油品较为适合。
Traditional closed pin-disk friction test cannot reflect the friction characteristics of the interface between tool and chip/workpiece in the cutting process.A new friction test method to analyzed the friction behavior between AlTiN-based coated tools and S136 hardened steel under MQL conditions is proposed.The friction coefficient at coating-workpiece interface is analyzed,and the influence mechanism of MQL on the friction and wear properties of the coating-workpiece is revealed.The results show that the interface friction coefficient is mainly affected by adhesion.The severer the adhesion becomes,the higher the friction coefficient is.And the spray force of oil mist has a significant effect on the friction coefficient,while the oil flow rate has no obvious effect.When the spray distance is 10 mm and 40 mm,a smaller friction coefficient can be obtained.For AlTiN coatings,HE30 synthetic lubricants are more conducive to reduce the interfacial friction coefficient.For AlTiN/TiSiN coatings,both VG25 vegetable-based lubricants and Plus20 fatty alcohol lubricants are suitable.
作者
袁尧辉
王成勇
杨简彰
梁赐乐
林华泰
李伟秋
Yuan Yaohui;Wang Chengyong;Yang Jianzhang;Liang Cile;Lin Huatai;Li Weiqiu(College of Mechanical and Electrical Engineering of Guangdong University of Technology,Guangzhou 510000,China;不详)
出处
《工具技术》
北大核心
2021年第9期24-29,共6页
Tool Engineering
基金
国家重点研发计划重点专项(2019YFB2005400)
国家自然科学基金-广东省联合基金(U1201245)。
