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Experimental study of distribution of energy during EDM process for utilization in thermal models

机译:热模型中电火花加工过程中能量分布的实验研究

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摘要

Electrical discharge machining (EDM) has steadily gained importance over the years because of its ability to cut and shape a wide variety of materials and complicated shapes with high accuracy. The effectiveness of the EDM process is evaluated in terms of the material removal rate, relative wear ratio and the surface roughness of the work piece. The input discharge energy during this process is distributed to various components of the process, which further influences the material removal rate and other machining characteristics like surface roughness. Since during this process the electrical energy is converted into heat energy, hence the theoretical modeling of this process is based upon the heat transfer equations and in all existing thermal models the fraction of the energy transferred to the workpiece, is one of the important parameters. The accurate prediction of the fraction of energy effectively transferred to the workpiece will help to reduce the errors of the thermal models. In this study experiments have been performed to study the percentage fraction of energy transferred to the workpiece utilizing heat transfer equations, at different EDM parameters. This study also relates the optimum parameters with the optimum utilization of input discharge energy and hence will help to improve the technological performance of this process.
机译:多年来,电火花加工(EDM)一直在稳步提高其重要性,因为它能够以高精度切割和成形各种材料和复杂形状。根据材料去除率,相对磨损率和工件的表面粗糙度来评估EDM工艺的有效性。在此过程中输入的放电能量被分配到该过程的各个组成部分,这进一步影响了材料去除率和其他加工特性(例如表面粗糙度)。由于在此过程中电能转化为热能,因此该过程的理论模型基于传热方程式,在所有现有的热模型中,转移到工件上的能量比例是重要的参数之一。准确预测有效转移到工件上的能量份额将有助于减少热模型的误差。在这项研究中,已经进行了实验,以研究在不同的EDM参数下利用热传递方程传递给工件的能量的百分比。这项研究还将最佳参数与输入放电能量的最佳利用联系在一起,因此将有助于改善该工艺的技术性能。

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