Multiobjective optimization and analysis of copper–titanium diboride electrode in EDM of monel 400™ alloy
Multiobjective optimization and analysis of copper–titanium diboride electrode in EDM of monel 400™ alloy
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DOI：
10.1080/10426914.2017.1415439
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发表时间：
2018-10
影响因子：
4.8
通讯作者：
P. M. Kumar;K. Sivakumar;N. Jayakumar
中科院分区：
文献类型：
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作者：
P. M. Kumar;K. Sivakumar;N. Jayakumar
摘要电火花加工是精密制造业中最常用的加工方法之一。在电火花加工过程中，寻找替代刀具材料是现代制造业的需求。为此，我们尝试在Monel400™材料上制作用于电火花加工的二硼化钛铜钛粉末冶金电极。试验设计采用中心复合二次旋转设计，模型建立采用响应面法。利用所建立的模型对加工特性进行了分析。在本研究中，选取四个输入参数：二硼化钛百分比、脉冲电流、脉冲开启时间和冲洗压力，以评估材料去除速率(MRR)和刀具磨损率(TWR)。通过方差分析检验了所建回归模型的充分性。采用基于期望值的多目标优化方法，寻找最大MRR和最小TWR的最优工艺参数。得到的最佳工艺参数为：二硼化钛用量为16%，脉冲电流为6A，冲洗压力为1 Mpa，脉冲开启时间为35µS，通过实验进一步验证了响应面模型的有效性。
ABSTRACT Electrical discharge machining (EDM) is one of the most accepted machining processes in the precision manufacturing industry. In EDM process, finding an alternative tool material is the demand in modern manufacturing industry. Therefore, an attempt had been made to fabricate copper–titanium diboride powder metallurgy electrode to test in EDM on monel 400™ material. The experiments are planned using center composite second-order rotatable design and the model is developed by response surface methodology. The machining characteristics have analyzed using the developed model. In this study, four input parameters such as titanium diboride percentage, pulse current, pulse on time, and flushing pressure are selected to evaluate the material removal rate (MRR) and tool wear rate (TWR). The adequacy of the developed regression model has tested through analysis of variance test. The desirability-based multiobjective optimization is used to find the optimal process parameter which has given maximum MRR and minimum TWR. The optimum process parameters obtained were titanium diboride of 16%, pulse current of 6 A, flushing pressure of 1 Mpa, and pulse on time of 35 µs. The validity of the response surface model is further verified by conducting confirmation experiments.