Manufacturing of Mold Cavity of Micro-double Gear by WEDM

Abstract

Micro-double gear is an important component that transmits power or motion as one of the key components of micro-device. In order to realize the mass and industrial production of micro-double gear, an injection mold of micro-double gear was designed. The single factor experiment and orthogonal experiment were used to optimize the process parameters of wire cut electrical discharge machining (WEDM) for machining micro-double gear mold cavity insert at the maximum cutting speed. The results show that the influence of process parameters on cutting speed is successively N, Toff and Ton , and N has the most significant influence on cutting speed, which is the key factor. When Ton =8µs, Toff =3Ton and N=5, the maximum cutting speed is 99.24mm2/min. The combination parameters of the maximum cutting speed were used to process the cavity insert of micro-double gear mold, and the cavity of micro-double gear mold was better fabricated.