Aiming at the problem of thermal damage layer on the surface after traditional short electric arc machining

the short electric arc–electrochemical hybrid machining of titanium alloy TC4 was studied

and the material removal mechanism of short electric arc-electrochemical hybrid machining was analyzed. The key parameters affecting the composite machining speed and surface quality were discussed through theoretical models. That is

the processing voltage

the resistivity of the working medium and the feed speed. The effects of key parameters on the surface quality of short electric arc–electrochemical hybrid machining were studied by single factor experiments. The experimental results show that the surface thermal damage layer after short electric arc machining can be well removed by using the

electrochemical effect of the bottom surface gap. When the feed speed is 4 mm/min

the thermal damage layer can be completely removed. The machining efficiency is 354 mm3/min

and the surface roughness S

a

is 17.982 μm.