微槽结构对前刀面润湿性能影响及参数优化  

Influence of Micro-Groove Structure on Wettability of Front Tool Surface and Parameter Optimization

作　　者：犹大国 何林[1,2] 周小容[1] 周滔 王伟强 YOU Daguo;HE Lin;ZHOU Xiaorong;ZHOU Tao;WANG Weiqiang(School of Mechanical Engineering,Guizhou University,Guiyang 550025,China;School of Mining and Mechanical Engineering,Liupanshui Normal University,Liupanshui 553000,China)

机构地区：[1]贵州大学机械工程学院,贵阳550025 [2]六盘水师范学院矿业与机械工程学院,六盘水553000

出　　处：《组合机床与自动化加工技术》2024年第7期132-136,141,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金项目(52265057)。

摘　　要：在刀具前刀面合理置入微槽织构可以改善刀具表面润湿性。为探究微槽槽宽、间距以及槽深对刀具表面润湿性能的影响,基于Wenzel理论,建立微槽表面液滴润湿数值模型,分析表观接触角随微槽结构参数变化的趋势,并通过COMSOL软件进行接触角数值模拟。结果表明,随着微槽结构参数的变化,液滴的润湿呈现Wenzel状态和Wenzel与Cassie的复合状态,对于Wenzel状态的微槽结构参数,表观接触角随着槽宽和间距的减小而减小,随着槽深的增大而减小;并且在槽宽为30μm,间距40μm,槽深70μm时,表观接触角最小,为54.4°,相对于本征接触角,降低了22%。Reasonable insertion of micro-groove texture on the front tool surface can improve the wettability of the tool surface.In order to explore the effects of micro-groove width,spacing and depth on the wettability of tool surface,a numerical model of droplet wetting on the surface of micro-groove was established based on Wenzel theory,and the trend of apparent contact angle variation with the structural parameters of micro-groove was analyzed,and the contact angle numerical simulation was carried out by COMSOL software.The results show that the droplet wetting presents Wenzel state and Wenzel and Cassie compound state with the change of the microstructure parameters.For the microstructure parameters of Wenzel state,the apparent contact Angle decreases with the decrease of the width and spacing of the micro-groove,and decreases with the increase of the depth of the microgroove.When the slot width is 30μm,the spacing is 40μm,and the slot depth is 70μm,the apparent contact angle is the smallest(54.4°),which is 22% lower than the intrinsic contact angle.

关 键 词：微槽织构 表面润湿性 Wenzel理论 COMSOL模拟 

分 类 号：TH16[机械工程—机械制造及自动化] TG71[金属学及工艺—刀具与模具]