Study of the effects of process parameters on tool wear rate in powder mixed electrical discharge machining by Taguchi method

Science and Technology Development Journal Pub Date : 2018-12-30 DOI:10.32508/STDJ.V20IK7.1375

P. Huu

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引用次数: 2

Abstract

There have been various attempts to improve the surface finish after Electrical Discharge Machining (EDM) by polishing and other means. But if it is possible to improve the surface during machining it will shorten the machining time. From this viewpoint powder mixed EDM (PMEDM) is one of these processes. PMEDM not only imparts fine machined surface finish but also modifies the machined surface. However, it is necessary to understand the mechanism of PMEDM process. In this study, influence of process parameters to tool wear rate (TWR) of PMEDM using titanium (Ti) powder is presented. The objective of the study is to evaluate the main effects of workpiece material, tool material, polarity, pulse-on time, intensity of discharge, pulse-off time, and powder concentration on the TWR in PMEDM. They carried out the investigation based on the Taguchi method involving seven control factors with three levels for an orthogonal array L27 (1313).The results indicated that electrode material, electrode polarity, pulse on time, current and powder concentration were the most significant parameters that influenced the TWR. This result will be the basis for selecting the factors in further optimization studies.

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田口法研究粉末混合电火花加工工艺参数对刀具磨损率的影响

在电火花加工(EDM)后，通过抛光和其他方法改善表面光洁度已经有了各种尝试。但如果能在加工过程中改善表面，将缩短加工时间。从这个角度来看，粉末混合电火花加工(PMEDM)就是其中一种。PMEDM不仅可以提高加工表面的光洁度，而且可以改变加工表面。然而，有必要了解PMEDM过程的机制。研究了工艺参数对钛粉PMEDM刀具磨损率的影响。研究的目的是评估工件材料、刀具材料、极性、脉冲开启时间、放电强度、脉冲关闭时间和粉末浓度对PMEDM中TWR的主要影响。他们基于田口法进行了调查，其中包括七个控制因素，三个水平的正交阵列L27(1313)。结果表明，电极材料、电极极性、脉冲时间、电流和粉末浓度是影响TWR最显著的参数。该结果将为进一步优化研究中选择因子提供依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Science and Technology Development Journal

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