共 22 条
An experimental investigation of wire electrical discharge machining of hot-pressed boron carbide
被引:19
作者:
Bobbili, Ravindranadh
[1
]
Madhu, V.
[1
]
Gogia, A. K.
[1
]
机构:
[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
来源:
DEFENCE TECHNOLOGY
|
2015年
/
11卷
/
04期
关键词:
Hot-pressed boron carbide;
MRR;
R-a;
Wire electrical discharge machining;
D O I:
10.1016/j.dt.2015.07.001
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
The present work discusses the experimental study on wire-cut electric discharge machining of hot-pressed boron carbide. The effects of machining parameters, such as pulse on time (TON), peak current (IP), flushing pressure (FP) and spark voltage on material removal rate (MRR) and surface roughness (R-a) of the material, have been evaluated. These parameters are found to have an effect on the surface integrity of boron carbide machined samples. Wear rate of brass wire increases with rise in input energy in machining of hot-pressed boron carbide. The surfaces of machined samples were examined using scanning electron microscopy (SEM). The influence of machining parameters on mechanism of MRR and R-a was described. It was demonstrated that higher TON and peak current deteriorate the surface finish of boron carbide samples and result in the formation of large craters, debris and micro cracks. The generation of spherical particles was noticed and it was attributed to surface tension of molten material. Macro-ridges were also observed on the surface due to protrusion of molten material at higher discharge energy levels. Copyright (C) 2015, China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved.
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页码:344 / 349
页数:6
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