Research on Dry Drilling Technology Based on Eddy Current Cooling and Electrostatic Lubrication
To reduce the environmental pollution caused by cutting fluid in machining process and the high cost in processing cut-ting fluid,a dry drilling technology and device with eddy current cooling effect and electrostatic lubrication effect was proposed.The gas was blown into the cutting area after ionization and ozonation to replace the cutting fluid to achieve lubrication and cooling,which could obtain a good chip breaking effect and prolong the tool life.Based on the influence law of the structure parameters on the system dis-charge performance,ozone concentration and cooling effect,the device structure was optimized to form the dry auxiliary drilling device.The experimental results show that when the electrode taper is 15°,the electrode diameter is 1 mm,the nozzle diameter is 3 mm,the gas flow rate is 20 L/min and the driving voltage is 6 kV,the ozone concentration reaches the peak of 34.2xl0-6.By comparing with pure dry cutting,it is found that the cutting temperature of the proposed technology is reduced by 40.9％,the cutting edge of the tool is basi-cally not damaged,and the surface of the chip microstructure is clear and uniform.The experimental results show that the designed eddy current cooling electrostatic lubrication dry drilling technology is superior to the traditional dry drilling technology in terms of cutting effect,cooling effect,tool wear and chip shape,and it can be used in the drilling of sixseries aluminum.
electrostatic lubricationeddy current coolingdry drilling technology
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