Influence Of Base Fluid Type On Atomization And Machining Characteristics Of Nanofluid Coaxial Electrostatic Atomization Cutting

Nanofluid coaxial electrostatic atomization cutting can solve the problems of large pollution in traditional machining and insufficient lubrication/cooling performance in minimum quantity lubrication.The physical properties and composition of base fluid have an important Effect on the atomization and machining characteristics of coaxial electrostatic atomization cutting.Therefore,this thesis proposes to study the Effect of base fluid type on the atomization and machining characteristics of nanofluid coaxial electrostatic atomization cutting.The specific research work is as follows:1.Atomization and charging performance of nanofluid coaxial electrostatic atomization cuttingCastor oil,palm oil,soybean oil,rapeseed oil,LB2000 oil and its oil-based nanofluids were used as outer fluids,deionized water and water-based nanofluids as the inner fluids,the experiments of coaxial electrostatic atomization and charging were carried out,the effects of voltage and types of inner and outer fluids on atomization state,atomization current and stability were studied.Stable atomization modes(Cone-jet)under different combinations of inner and outer fluids,and the Effect of the voltage range and the types of inner and outer fluids on the charging performance of stable atomization mode were obtained.2.Electrowetting properties of nanofluid composite dropletsBuild a platform for measuring the contact angle of electrowetting,the Effect of voltage and base oil type on the contact angle of nanofluid composite droplets was studied through the electric wetting test,and the nanofluid composite droplet base oil type with the best electric wetting performance was obtained.3.Droplet transport characteristics in coaxial electrostatic atomization cutting of nanofluids with different base fluidsBased on the analysis of the force on droplets in coaxial electrostatic atomization milling,the mathematical model of droplet trajectory tracking is established.By using Comsol software CFD module,AC/DC module and fluid flow particle tracking module,the droplet transport simulation model of coaxial electrostatic atomization cutting is established,and the accuracy of the model is verified by cutting experiments.The distribution of air flow field,pressure field and electrostatic field around the milling cutter and the Effect of different base liquid types on droplet transport were studied by simulation.4.The Effect of base fluid types on the cutting performance of nanofluid coaxial electrostatic atomizationBased on the coaxial electrostatic atomization cutting test platform,aluminum alloy milling experiments were carried out.Combined with the physical and chemical properties,composition,electrowetting performance,atomization stability and droplet transport effect of different base fluids,the effects of base fluid types on the cutting force and temperature in coaxial electrostatic atomization cutting of nanofluids were studied,and the optimal base oil type,inner and outer fluids combination for coaxial electrostatic atomization cutting were obtained.