Effect of Channel Roughness on Micro-Droplet Distribution in Internal Minimum Quantity Lubrication

This research studied the effect of channel roughness on micro-droplet distributions in internal minimum quantity lubrication for effective machining. Mixtures different oils and air were flown though channels with simulated roughness: as fabricated, partially threaded, fully threaded. The airborne droplets collected, analyzed, compared results by computational fluid dynamics. For low-viscous lubricant, rough surface helped to break large boundary layer into smaller reintroduce them main downstream flow. opposite trend was found higher viscous lubricant. study also performed chemical etching roughen selected surfaces carbide cutting tools. synergy hand ultrasonic agitation successfully roughened a within twelve minutes. Scanning electron microscopy examination showed deep that removed all grinding marks WC–Co tool surface.