ワイヤ放電加工中に発生する電磁力に関する研究

概要

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This paper clarifies the mechanism of the electromagnetic force applied to the wire electrode in wire-EDM. The distribution of the magnetic flux density caused by the steady current was analyzed using finite element method(FEM) to calculate the electromagnetic force. The electromagnetic force theoretically obtained was used for analysis of the wire vibration under two kinds of current waveforms: single long current pulse and consecutive short current pulses. From the comparison of wire vibrations obtained from the experiment and analysis, it was found that the electromagnetic force is caused by both DC and AC components of the discharge current. When the workpiece is ferromagnetic, the electromagnetic force caused by DC component of the discharge current is dominant, and it is an attractive force. When the workpiece is paramagnetic, the electromagnetic force caused by DC component of the discharge current is insignificant compared with the force caused by AC components due to electromagnetic induction.
公益社団法人精密工学会の論文
2008-04-05