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首页> 外文会议>High performance and optimum design of structures and materials >Effect of electric discharge machining of die steel DIN 1.2714 and DIN 1.2343 on surface characteristics and performance measures
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Effect of electric discharge machining of die steel DIN 1.2714 and DIN 1.2343 on surface characteristics and performance measures

机译：DIN 1.2714和DIN 1.2343模具钢的放电加工对表面特性和性能指标的影响

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摘要

Electrical Discharge Machining (EDM) is progressively becoming a vital tool in modern industry. Its performance, success and outcome depend upon the selection of suitable electrical and non-electrical parameters. In the present research EDM was applied to die steels DIN 1.2714 and powder mixed electrical discharge machining (PMEDM) was applied to die steels DIN 1.2714 and DIN 1.2343. Regarding surface characteristics, surface roughness is found to increase with current increase and white layer thickness (WLT) increased too. Similarly, the effect of increasing pulse duration on surface roughness and white layer thickness is found to be comparable. As for performance measures, steel DIN 1.2714 results have indicated reduced ratio of Metal Removal Rate (MRR) to Electrode Wear Rate (EWR) from about 60 to 8.5 upon current increase. On the other hand, the ratio (MRR/EWR) exhibited significant increase upon increasing pulse duration, attributed mainly to reduced EWR. Results due to EDM using graphite powder in dielectric kerosene, showed reduced electrode consumption. Results to steel DIN 1.2714 indicated a noticeable increase of the ratio (MRR/EWR) at high pulse duration upon increasing powder concentration from 0 to 5.5 (g/I). Statistical analyses showed a significant effect of pulse duration, powder concentration and their interaction on the ratio (MRR/EWR).
机译：放电加工（EDM）逐渐成为现代工业中的重要工具。它的性能，成功和结果取决于合适的电气和非电气参数的选择。在本研究中，EDM被应用于DIN 1.2714的模具钢，粉末混合放电加工（PMEDM）被应用于DIN 1.2714和DIN 1.2343的模具钢。关于表面特性，发现表面粗糙度随着电流的增加而增加，并且白层厚度（WLT）也增加。类似地，发现增加脉冲持续时间对表面粗糙度和白色层厚度的影响是可比较的。至于性能指标，钢的DIN 1.2714结果表明，随着电流的增加，金属去除率（MRR）与电极磨损率（EWR）的比率从大约60降低到8.5。另一方面，随着脉冲持续时间的增加，比率（MRR / EWR）显示出显着增加，这主要归因于EWR的减少。由于在电介质煤油中使用石墨粉进行EDM，结果表明电极消耗减少。根据DIN 1.2714钢的结果表明，当粉末浓度从0增加到5.5（g / I）时，高脉冲持续时间下的比率（MRR / EWR）明显增加。统计分析表明，脉冲持续时间，粉末浓度及其相互作用对比率（MRR / EWR）有显着影响。

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