范数权重灰关联度超声电火花优化试验研究

Experiments and Study of Parameter Optimization of Ultrasonic EDM

采用基于范数权重的灰关联度分析方法对高硅铝合金进行多目标优化试验分析。通过对各工艺指标灰关联系数的极差分析和主效应分析,研究了工件竖直超声振动加工中峰值电流、间隙电压、脉冲间隔、脉冲宽度对加工效率和加工精度的影响。使用范数的方法确定了各工艺指标的权重进而对综合工艺指标进行了优化,得到一组最优参数组合。试验验证结果表明,经过优化以后表面精度提高25.63%,加工时间减少了3.542%,优化组的综合指标灰关联度提高为0.732。

This paper uses the gray relation analysis method based on norm weights to perform the test analysis of multiple optimal objectives of high Si-Al alloy. In horizontal ultrasonic EDM,the influence of processing parameters such as peak current, gap voltage, pulse width, pulse interval on machining efficiency and machining accuracy is studied and the norm method and PCA are used to determine the weights of processing parameters and optimize the comprehensive processing indicators in order to obtain a set of optimal parameter combination. The experimental results show that the surface accuracy is increased by 25.63%, the processing time is reduced by 3.542%, and the comprehensive gray correlation is increased by 0.732.