放电加工 Monel 400 合金时模具电介质影响的研究

Madhanagopal Manoharan, Sudalai Perumal, Arivendhan Ajithram, S. D. Kumar, J. Ekanthamoorthy
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摘要

放电加工(EDM)是一种基于热能的非常规侵蚀工艺,主要用于加工硬质材料。材料去除率(MRR)和表面粗糙度是用来描述放电加工过程中加工表面介电性质的响应参数。在介电流体中添加成分可以改善介电流体的特性,从而更好地加工样品。介电流体介质在控制放电和吸热方面起着关键作用,从而在加工过程中清除碎屑并冷却工件。在当前的研究中,通过研究不同介质介质对电火花加工过程中加工参数的影响,并在介质介质中添加不同粉末,从而获得高精度和更好的加工零件表面形貌。在介电流体中添加钛(Ti)、硅(Si)、石墨(Gr)、铜(Cu)和氧化铝(Al2O3)等粉末可增加工件与工具相互作用的对流特性,同时提高材料的微硬度。本研究分析了 Monel 400 合金放电加工(EDM)的性能研究,通过在介电介质中添加金属粉末,可以改善放电加工的性能。测量了放电加工过程中加工出的样品的材料去除率(MRR)。此外,还制定了 Taguchi L27 正交阵列,按顺序进行加工,以了解加工过程参数对不同介质材料去除率的影响。结果发现,氧化铝、石墨粉与放电加工油混合后,材料去除率更高,加工时间更短。此外,在电介质中加入铜粉可提供更好的加工性能响应参数。但它更适用于细长比高的零件,尤其是孔。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation on Influence of Die Electric Medium in Electrical Discharge Machining of Monel 400 Alloy
Electrical Discharge Machining (EDM) is a non-conventional thermal energy based erosive process, which primarily applied for machining hard materials. Material Removal Rate (MRR) and surface roughness are the response parameters used to characterize the dielectric nature of the machined surface in EDM process. Addition of ingredients in the dielectric fluid improves the properties of fluid for better machining of the samples. The dielectric fluid medium plays a key role in controlling the electrical discharge and heat absorption, thereby removes the debris and cools the work piece during the machining process. In the current study, comprehensive work is done by investigating the effect of different dielectric fluid medium on machining parameters of EDM process with the addition of different powders in the dielectric fluid, which results in high precise and better topography in the machined part surface. Addition of powders such as Titanium (Ti), Silicon (Si), Graphite (Gr), Copper (Cu) and Aluminium Oxide (Al2O3) in dielectric fluid increases the convection property in the work piece tool interaction with increase in the micro-hardness of material. This work analyses the performance study of Electrical Discharge Machining (EDM) of Monel 400 alloys, which can be improved by adding metallic powder into the dielectric medium. Material Removal Rate (MRR) is measured in the samples machined out of EDM process. In addition, Taguchi L27 Orthogonal Array is formulated for conducting machining in a sequential order to understand the implications of machined process parameters on the material removal rate over different dielectric mediums. It is found that the Aluminium oxide, graphite powder mix with EDM oil gives better material removal rate and less machining time. Furthermore, the introduction of Cu powders in the dielectric fluid provides better machinability response parameters. But it is preferable to parts with high slenderness ratio especially holes.
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