微量润滑切削雾化液滴毛细管渗透机理研究

Study on Capillary Permeation Mechanism of Atomized Droplet inMinimum Quantity Lubrication Cutting

微量润滑切削在绿色加工领域有广阔的发展前景,但是在加工过程中润滑油雾的毛细管渗透机理和影响规律仍不明晰。因此,设计了带有负压环境的微切槽毛细管渗透试验,结合雾化液滴毛细管渗透的动力学分析,探究了微量润滑条件下气压、流量和微切槽毛细管横截面积对液滴渗透速度的影响规律。结果表明,毛细管中的负压环境为液滴的渗透提供了便利;随着气压和流量增大,液滴的渗透速度增大,但是毛细管的截面大小对液滴的渗透速度并无显著影响。

Minimum quantity lubrication cutting has a great potential future in the field of green processing technology.However,the capillary permeation mechanism and influence law of lubricating oil mist are still unclear during machining.Therefore,combined with the kinetic analysis of capillary permeation of atomized droplet,microchannel capillary permeation experiment with negative pressure environment is designed in this paper to explore the effects of parameters,such as air pressure,flow rate and microchannel capillary cross sectional area on the droplet penetration velocity under the condition of minimum quantity lubrication.The results show that the negative pressure environment in the capillary facilitates the droplet penetration.With the increase of air pressure and flow rate,the droplet penetration velocity increases,but the capillary section size has no significant effect on the droplet penetration velocity.