Abstract
Electrical Discharge Machining is a process to remove a portion of material by electric discharge in insulating working fluid. The material is melting by discharge and blown off the material by the vaporizing explosion of working fluid. The melting section is conceivable to be blown by the vaporizing explosion. Expanding and contracting of the bubble are affected material removal. The vaporizing explosion power is determined by the input energy, the removal quantity of material is determined by the degree of vaporizing explosion power. By the way, Micro-bubble is a bubble of 50 μm or less in diameter. Micro-bubble has special nature that increasing in interior gas pressure, increasing in ion concentration around the gas-water interface etc. We consider change the characteristics of electrical discharge machining by micro-bubble mixed fluid. The vaporizing explosion is considered to be weakened by micro-bubble mixed fluid and the surface roughness seems to be improved. So we do electrical discharge machining using pure water and micro-bubble mixed fluid and researched characteristics of electrical discharge machining.
