Electrostatic Filter of Dielectric Fluid in Electrical Discharge Machining

To remove sludge produced in a dielectric fluid during electrical discharge machining, it is a usual practice to use a mechanical filter. The mechanical filter, however, is poor in filtering capacity and tends to be clogged. This paper is concerned with performance of an electrostatic filter utilizing electrophoretic phenomena, illustration of which is made by YASPARK FILTER F-60. This filter, (tank capacity of 60 l and filtering capacity of 20 l/min), removes sludge completely from the fluid in electrical discharge machining on 1.5 kW power supply, making possible continuation of machining with the fluid free from sludge.