首页> 外文OA文献 >Grinding-aided electrochemical discharge machining of particulate reinforced metal matrix composites
【2h】

Grinding-aided electrochemical discharge machining of particulate reinforced metal matrix composites

机译:颗粒增强金属基复合材料的磨削电化学放电加工

摘要

A grinding-aided electrochemical discharge machining (G-ECDM) process has been developed to improve the performance of the conventional ECDM process in machining particulate reinforced metal matrix composites (MMCs). The G-ECDM process functions under a combined action of electrochemical dissolution, spark erosion, and direct mechanical grinding. The tool electrode has a coating containing a hard reinforcement phase of diamond particles. The MMC employed in this study was Al2O3 particulate reinforced aluminum 6061 alloy. The material removal mechanism of this hybrid process has been analyzed. The results showed that the grinding action can effectively remove re-cast material deposited on the machining surface. The surface roughness (Ra) measured for the G-ECDM specimen was ten times smaller than that of the specimen machined without grinding aid (i.e., ECDM alone). Moreover, the material removal rate (MRR) of G-ECDM was about three times higher than that of ECDM under the experimental conditions of this study. The voltage waveform and crater distribution were also analyzed, and the experimental results showed that the G-ECDM process operates in a stable condition. The relative importance of the various processing parameters on MRR was established using orthogonal analysis. The results showed that MRR is influenced by the machining parameters in the order of duty cycle current electrolyte concentration. This study showed that the G-ECDM process is superior to the ECDM process for machining particulate reinforced MMCs, where a higher machining efficiency and a better surface quality can be obtained.
机译:已开发出一种磨削辅助的电化学放电加工(G-ECDM)工艺,以改善传统ECDM工艺在加工颗粒增强金属基复合材料(MMC)中的性能。 G-ECDM工艺在电化学溶解,电火花腐蚀和直接机械研磨的综合作用下起作用。工具电极具有包含金刚石颗粒的硬增强相的涂层。在这项研究中使用的MMC是Al2O3颗粒增强铝6061合金。已经分析了该混合过程的材料去除机理。结果表明,磨削作用可以有效去除沉积在加工表面上的重铸材料。对于G-ECDM样品测得的表面粗糙度(Ra)比不使用助磨剂加工的样品(即仅ECDM)小十倍。此外,在本研究的实验条件下,G-ECDM的材料去除率(MRR)约为ECDM的三倍。分析了电压波形和火山口分布,实验结果表明,G-ECDM工艺运行稳定。使用正交分析确定了各种加工参数对MRR的相对重要性。结果表明,MRR受加工参数的影响依次为占空比>电流>电解质浓度。这项研究表明,G-ECDM工艺优于ECDM工艺来加工颗粒增强型MMC,在这种工艺中可以获得更高的加工效率和更好的表面质量。

著录项

  • 作者

    Liu JW; Yue TM; Guo ZN;

  • 作者单位
  • 年度 2013
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号