Comparison of machining performance under MQL and ultra-high voltage EMQL conditions based on tribological properties

This novel work presents the comparison of a newly developed ultra-high voltage electrostatic minimum quantity lubrication (EMQL) using a customized nozzle with the MQL technique as an alternative cooling/lubricating method in turning processes of 15-5 PHSS. The optimum voltage for EMQL within the range of 0-25 kV has been identified based on tribological performance. Besides, surface roughness has been measured to identify the impact of electrostatically charged mist for turning 15-5 PHSS. Finally, tool wear tests are performed for MQL and EMQL at optimized voltage. The EMQL at optimized electrostatic voltage resulted in 38% decreased tool wear as compared to conventional MQL for 2400 mm cutting length.

Automated summary

This study compares a newly developed ultra-high voltage electrostatic minimum quantity lubrication (EMQL) technique with traditional MQL technique in turning processes of 15-5 PHSS, examining the tribological performance, surface roughness, and tool wear under different voltages to determine the optimal electrostatic voltage for improved performance.