Method and device for measuring particle size of nano particle jet minimum quantity lubrication grinding droplets

Abstract

The invention relates to a method and device for measuring a particle size of nano particle jet minimum quantity lubrication grinding droplets. The uniformity of a droplet spectrum, the deposition efficiency and an effective fluid utilization rate can be improved, the movement rule of the droplets is effectively controlled, and environmental pollution is reduced. The device comprises an adjustable nano fluid circuit and an adjustable gas supply circuit, wherein the two circuits are connected with a nozzle; the gas and grinding fluid are mixed in the nozzle to eject grinding fluid droplets into a grinding area on a workpiece; the grinding fluid droplets are scanned by adopting two confocal microscopes, wherein one confocal microscope is positioned in the direction perpendicular to the surface of the workpiece and moves along the xy direction, and the other confocal microscope is positioned in the direction parallel to the surface of the workpiece and moves along the xz direction; the side view and vertical view of the same single droplet which drops on the surface of the workpiece are acquired respectively, the scanned image is processed by a computer, the distribution rule of the single droplets is obtained, and the contour shape of the droplets is simulated, so that the particle size of the single grinding fluid droplet is determined.

Description

technical field [0001] The invention relates to a method and device for measuring mist droplets sprayed by grinding fluid onto workpieces in mechanical processing, in particular to a method and device for measuring the diameter of mist droplets in nano particle jet micro-lubrication grinding. Background technique [0002] Nano-jet micro-quantity lubrication is established based on the theory of enhanced heat transfer. From the theory of enhanced heat transfer, it can be known that the heat transfer capacity of solids is much greater than that of liquids and gases. At room temperature, the thermal conductivity of solid materials is several orders of magnitude greater than that of fluid materials. Adding solid particles to the MQL medium can significantly increase the thermal conductivity of the fluid medium, improve the ability of convective heat transfer, and greatly compensate for the lack of cooling capacity of MQL. In addition, nanoparticles (referring to ultra-fine soli...

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Problems solved by technology

[0012] The object of the present invention is to solve the problem that the droplet size of the micro-quantity lubrication grinding lubricant sprayed onto the workpiece is not easy to measure, and to provide a method and device for measuring the particle size of the nano-particle jet micro-lubrication grinding droplet, which combines Microscopic technology measures the particle size of nano-particle jet micro-lubrication grinding droplets distributed on the surface of the workpiece, so that the distribution of droplets on the surface of the workpiece is clearly visible, and the shape profile of a single droplet can be obtained by scanning, so that the droplet size can be calculated. The particle size is helpful to study the distribution law of jet micro-lubrication grinding droplets, improve the effective utilization rate of nano-particle micro-lubrication grinding fluid, improve grinding performance, reduce environmental pollution, and provide better health protection

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