Abstract:The manufacturing process of PCE(positive continuous engagement) type sprag clutch in China now-
days was summarized. In order to manufacture high-quality sprag clutch, a processing technology of sprags based on
the WEDM-LS(low speed wire cut electrical discharge machining)was proposed. Adopting orthogonal method to exper-
iment on wire cutting electrical parameters and analysizing surfaces of wire cutting sample with scanning electron mi-
croscope. The result shows that the sequence of factors effecting the surface roughness is pulse width, stop time, the
servo ratio and the initial voltage, and there is a loose structure on the metamorphic layer, which contains Cu and Zn
and with the thickness of about 15 to 20 μm.
