Abstract
In order to reveal the small electrical discharge machining (EDM) characteristics of Ti-6Al-4V alloy with rotating electrode, a series EDM tests are carried out. Attaching importance to surface roughness, the discharge current must be small, but when it under the range of 0.2A, even though it is more smaller, the surface roughness can not be in expectation of improvement. When the electrode is negative polarity, the work surface will be stuck with carbon to make a clear-out crater profile of discharge point. Machining the Ti-6Al-4V alloy in the small discharge current, the material removal rate increases with the increasing of pulse duration, but there is no effect on the work surface.
