Research on Electrical Properties of the Cutting Zone in Cutting Metal/Insulation Materials

The cutting process is accompanied by complex electrical phenomena, which are particularly evident in narrow cutting clearances. To further explore the laws of electrical phenomena in the capillary of the cutting zone, this paper uses a Faraday collector with an external bias electric field to investigate the electrical phenomena in the narrow slit of the cutting zone under different cutting parameters and when different tool and workpiece materials are combined. The results show that there is a stable and continuous electrical phenomenon in the cutting contact area, and the emission intensity of charged particles when cutting insulating materials is significantly higher than that of metals. The emission intensity of negative ions is higher than that of positive ions. The electrical and mechanical properties of materials have a significant impact on the electrical phenomena in the cutting zone. In addition, it was found that there is a linear relationship between the electrical phenomena in the cutting zone and the cutting parameters. Finally, based on the morphology of the capillaries in the cutting zone, the self-excited electric field intensity generated in it during the cutting process was estimated.