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
犹大国 1何林 2周小容 1周滔 1王伟强1
作者信息
- 1. 贵州大学机械工程学院,贵阳 550025
- 2. 贵州大学机械工程学院,贵阳 550025;六盘水师范学院矿业与机械工程学院,六盘水 553000
- 折叠
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 30 μm,间距40 μm,槽深70 μm时,表观接触角最小,为54.4°,相对于本征接触角,降低了22%.
Abstract
Reasonable insertion of micro-groove texture on the front tool surface can improve the wettabili-ty of the tool surface.In order to explore the effects of micro-groove width,spacing and depth on the wetta-bility 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 soft-ware.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 30 μm,the spacing is 40 μm,and the slot depth is 70 μm,the apparent contact angle is the smallest(54.4°),which is 22%low-er than the intrinsic contact angle.
关键词
微槽织构/表面润湿性/Wenzel理论/COMSOL模拟Key words
microgroove texture/surface wettability/Wenzel theory/COMSOL simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据