Study on Discharge Gap of Micro-EDM of the Micro Hole in Titanium Alloy

Micro-EDM is a non-contact machining method. There is a certain discharge gap between the tool electrode and the workpiece during machining. The size and consistency of the discharge gap have great influences on the machining precision of the micro hole machining, which seriously affects the machining precision of the titanium alloy micropore. In this paper, through the different peak current, peak voltage, pulse width, pulse interval and other parameters of the blind hole processing test, the effects of various factors on the discharge gap. Thus, the size of the tool electrode can be adjusted to compensate for the effect of the discharge gap on the dimensional accuracy.