The findings of a study on the optimization of Electric Discharge Machining(EDM)procedure for processing cylindrically shaped components with graphite electrodes are presented in this paper.Tool steel 90CrSi was the m...The findings of a study on the optimization of Electric Discharge Machining(EDM)procedure for processing cylindrically shaped components with graphite electrodes are presented in this paper.Tool steel 90CrSi was the material of choice for the study’s workpiece.Additionally,the Electrode Wear Rate(EWR)was chosen as the optimization problem’s objective function.An experiment using the Taguchi design was conducted to address this issue.Additionally,experiments were created and their outcomes were analyzed using the Minitab R19 program.The impact of the input process factors on EWR was investigated,including the powder concentration,the pulse on and off times,the servo current,and the servo voltage.Additionally,the best process variables for a minimal EWR were provided.展开更多
The influences of intense magnetic pinch effect caused by electromagnetic field with high frequency on discharge channel expansion and plasma configuration change are discussed. The change of Lorentz force exerting on...The influences of intense magnetic pinch effect caused by electromagnetic field with high frequency on discharge channel expansion and plasma configuration change are discussed. The change of Lorentz force exerting on charged particles in discharge channel is calculated under the electromagnetic field with high frequency. Through the theoretical analysis and experimental study, the forming process of discharge channel is conjectured. And it is considered that the changes of discharge channel, such as the decrease of diameter and increase of energy density, coming from the intense magnetic pinch effect in high frequency electromagnetic field, are the main reasons for a series of special phenomena on the machined surface in micro EDM.展开更多
文摘The findings of a study on the optimization of Electric Discharge Machining(EDM)procedure for processing cylindrically shaped components with graphite electrodes are presented in this paper.Tool steel 90CrSi was the material of choice for the study’s workpiece.Additionally,the Electrode Wear Rate(EWR)was chosen as the optimization problem’s objective function.An experiment using the Taguchi design was conducted to address this issue.Additionally,experiments were created and their outcomes were analyzed using the Minitab R19 program.The impact of the input process factors on EWR was investigated,including the powder concentration,the pulse on and off times,the servo current,and the servo voltage.Additionally,the best process variables for a minimal EWR were provided.
基金Supported by the National Natural Science Foundation of China(50635040)~~
文摘The influences of intense magnetic pinch effect caused by electromagnetic field with high frequency on discharge channel expansion and plasma configuration change are discussed. The change of Lorentz force exerting on charged particles in discharge channel is calculated under the electromagnetic field with high frequency. Through the theoretical analysis and experimental study, the forming process of discharge channel is conjectured. And it is considered that the changes of discharge channel, such as the decrease of diameter and increase of energy density, coming from the intense magnetic pinch effect in high frequency electromagnetic field, are the main reasons for a series of special phenomena on the machined surface in micro EDM.
