Abstract:

The effect of liquid field is very important to the cathode design in electrochemical machining. In this paper,based on the liquid field characteristics,a practicable mathematical model of the conductivity change in li-quid direction was established by considering the efects of temperature increasing,gas rate and pressure of the machining gap on the conductivity.Th is model was then used to design the tool cathode.Moreover,the gap distribu-tion based on the proposed model was compared with that based on the electric field only,with the conclusion that the cathode shape design ed with the proposed conductivity model more fits the workpiece shape and accords more with the actual physical process of electrochemical machining.

Key words: electrochemical machining, liquid field, conductivity, cathode desig