研究了粉末冶金制备的Cu-Cr刀具在电火花加工EN9钢时的性能评价

IF 1.4 Q2 ENGINEERING, MULTIDISCIPLINARY
Abhinav Shard, Mohinder Pal Garg, Vishal Gupta
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引用次数: 0

摘要

本研究的目的是探讨电火花加工(EDM)在粉末冶金加工刀具时的加工特性。由于使用传统加工方法获得的纯铜刀具存在刀具磨损率高的问题,刀具氧化导致刀具形状特征的丧失。设计/方法/方法本研究调查采用田口稳健实验设计进行实验计划,并采用方差分析(ANOVA)进行统计分析。研究发现,与纯铜工具相比,铜和铬电极的金属去除率较低。方差分析结果表明,电火花加工EN9钢的MRR受极性、峰值电流、脉冲时间和电极类型的显著影响,而脉冲时间、间隙电压和电极类型对EWR有显著影响。此外,该过程还表明,粉末冶金刀具的使用有效地降低了加工表面的SR值和刀具的磨损率。研究表明,利用粉末冶金电极提高电火花加工的加工效率是可行的。研究局限性/启示本研究无重大局限性或启示。然而,粉末冶金中用于制造工具的粉末的成分需要精确控制,并在随后的电极制造过程中仔细控制工艺变量。据作者所知,这是第一个研究用粉末冶金方法在EN9钢的电火花加工中制作铜和铬电极/工具的有效性的研究。在电火花加工中,工具的有效性是根据生产率以及MRR和零件表面粗糙度的精度测量来评估的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating the performance evaluation of Cu-Cr tool fabricated by powder metallurgy during electrical discharge machining of EN9 steel
Purpose The purpose of this study is to explore the machining characteristics of electrical discharge machining (EDM) when a tool is fabricated using powder metallurgy. Because pure Cu tools obtained using conventional machining pose problems of high tool wear rate, tool oxidation causes loss of characteristics in tool shape. Design/methodology/approach The research investigation carried out experiments planned through Taguchi’s robust design of experiments and used analysis of variance (ANOVA) to carry out statistical analysis. Findings It has been found that copper and chromium electrodes give less metal removal rate as compared to the pure Cu tool. Analytical outcomes of ANOVA demonstrated that MRR is notably affected by the variable’s polarity, peak current, pulse on time and electrode type in the machining of EN9 steel with EDM, whereas the variables pulse on time, gap voltage and electrode type have a significant influence on EWR. Furthermore, the process also showed that the use of powder metallurgy tool effectively reduces the value of SR of the machined surface as well as the tool wear rate. The investigation exhibited the possibility of the use of powder metallurgy electrodes to upgrade the machining efficiency of EDM process. Research limitations/implications There is no major limitation or implication of this study. However, the composition of the powders used in powder metallurgy for the fabrication of tools needs to be precisely controlled with careful control of process variables during subsequent fabrication of electrodes. Originality/value To the best of the authors’ knowledge, this is the first study that investigates the effectiveness of copper and chromium electrodes/tools fabricated by means of powder metallurgy in EDM of EN9 steel. The effectiveness of the tool is assessed in terms of productivity, as well as accuracy measures of MRR and surface roughness of the components in EDM machining.
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来源期刊
World Journal of Engineering
World Journal of Engineering ENGINEERING, MULTIDISCIPLINARY-
CiteScore
4.20
自引率
10.50%
发文量
78
期刊介绍: The main focus of the World Journal of Engineering (WJE) is on, but not limited to; Civil Engineering, Material and Mechanical Engineering, Electrical and Electronic Engineering, Geotechnical and Mining Engineering, Nanoengineering and Nanoscience The journal bridges the gap between materials science and materials engineering, and between nano-engineering and nano-science. A distinguished editorial board assists the Editor-in-Chief, Professor Sun. All papers undergo a double-blind peer review process. For a full list of the journal''s esteemed review board, please see below.
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