study on wire-EDM (3rd Report)

Behavious of wire electrode and Machinability of electrodischarge

Abstract

It is important to analyse the behavious of the wire electrode in the gap of wire-EDM. There are some papers dealing with the existence of the incurvation of the wire and that of the wirelag behind the position given by the numerical control. But in these papers problems were analysed only by statical view point.
For improving the performance of wire-EDM, the dynamic behavious of the wire in the working gap should be discussed. Considering the mechanical configuration of wire-winding system, the dynamic behaviour of the wire was studied here by the observation of the gap with and by the Fourier analysis of the polarized voltage process of the working gap.
It was found out that the wire-vibration between the working gap took various modes according to the working condition, and it was posited out that the vibratio of the modes was very sensitive to both the thickness of the workpiece and the work feed rate.