同轴静电雾化切削雾化研究

Investigation on Co-axial Electrostatic Atomization Cutting

同轴静电雾化对于实际切削加工具有重要影响,通过搭建同轴静电雾化切削平台,利用显微成像系统进行植物性润滑油LB2000和去离子水两种互不相溶液体介质的同轴静电雾化切削雾化试验,研究了电极电压以及内外流量对雾化形态的影响,并将同轴静电雾化切削三维模型导入Ansoft Maxwell有限元仿真软件中,研究电压对喷嘴、刀具和工件之间静电场强度的影响。结果表明:同轴静电雾化切削中出现"滴状"模式、"脉动"模式、"锥射流"模式以及"不稳定"模式;与其他模式相比,稳定的锥射流是适合用于切削加工冷却润滑的同轴静电雾化模式。分析研究了稳定锥射流形成机理,获得了形成该模式的雾化参数范围,结合同轴静电喷雾切削静电场仿真结果,揭示了电极电压对同轴静电雾化切削的雾化形态影响机理,为同轴静电雾化切削的实际应用提供依据。

Co-axial electrostatic atomization has an important influence on the actual cutting process. In this paper,co-axial electrostatic atomization cutting platform and microscope imaging system are built to study atomization experiments with two kinds of immiscible liquid media. The influences of electrode voltage and liquid flow rate on the atomization shape are studied. The three-dimensional model of co-axial electrostatic atomization cutting is introduced into the Ansoft Maxwell finite element simulation software. The influence of voltage on the electrostatic field intensity among nozzle,tool and workpiece are studied. Dripping mode,spindle mode,cone-jet mode,unstable cone-jet mode are shown in electrostatic atomization cutting. The results show that compared with other modes,cone-jet is more applicable for the co-axial electrostatic spray mode of cooling lubrication in metal cutting. The range of atomization parameters of cone-jet mode is achieved. In combination with simulation results of electrostatic field in co-axial electrostatic atomization cutting. The influence mechanism of electrode voltage on the atomization shape of co-axial electrostatic atomization cutting is revealed. The range of voltage and flow rate for cone-jet in that the jet can be sprayed to the cutting edge is achieved,which could provide a basis for application of coaxial electrostatic atomization cutting.