KONG Kui，HU Zhi-qiang，YAO Wei-qiang，HUANG Shui-quan，XV Xue-feng
（Key Laboratory of Special Purpose Equipment and Advanced Processing Technology，
Ministry of Education & Zhejiang Province，Zhejiang University of Technology，Hangzhou 310014，China）
Abstract：In order to understand the sizes distribution characteristics of the cutting fluid droplets for electrostatic atomization lubrication，image recognition and detection technology was applied to the sizes measures of the charged cutting fluid droplets. After the featureextraction and recognition analysis of droplets areas in collecting images，the transformation of two-dimensional plane diameter andthree-dimensional space diameter was established. A practical method was presented to detect the distribution characteristics of droplets
sizes in gas-fog flow. On the basis of setting droplets collecting device，the droplets in gas-fog flow werecollected and detected on thedifferent sections. The experiment results indicate that the Sauter mean diameter（SMD）of droplets become smaller with the electrostaticvoltage increasing. The distribution of the droplets diameters become more uniform and the atomization quality is improved dramatically.On the three sections from 60 mm~140 mm，the average SMD of droplets are increased with the spray distance increasing and thedistribution of the droplets diameters become more nonuniform.
Key words：electrostatic atomization；minimum quantity lubrication（MQL）；diameter；Matlab；image processing；sauter mean diameter（SMD）