An investigation on surface integrity in EDM process with a copper tungsten electrode

被引:24
作者
Rizvi, Syed Asghar Husain [1 ]
Agarwal, Sanjay [1 ]
机构
[1] BIET, Dept Mech Engn, Jhansi 284128, Uttar Pradesh, India
来源
18TH CIRP CONFERENCE ON ELECTRO PHYSICAL AND CHEMICAL MACHINING (ISEM XVIII) | 2016年 / 42卷
关键词
EDM; crack density; surface roughness; residual stress; TOOL STEELS; ELECTRODISCHARGE;
D O I
10.1016/j.procir.2016.02.254
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
One of the most important non-conventional machining methods is Electrical Discharge Machining (EDM). The present study performs the EDM process with copper tungsten electrode of diameter 2 mm to establish the influence of the EDM parameters on various aspects of the surface integrity of AISI 4340 steel. The residual stress induced by the EDM process is measured using the X-rays diffraction method. The experimental results reveal that the values of material removal rate (MRR), surface roughness (SR), and induced residual stress tend to increase at higher values of pulse current and pulse-on duration. However, for extended pulse-on duration, it is noted that the MRR, SR, and surface crack density all decrease. A smaller pulse current (i.e. 1A) tends to increase the surface crack density, while a prolonged pulse-on duration (i.e. 30 mu s) widens the opening degree of the surface crack, thereby reducing the surface crack density. It is determined that the residual stress can be controlled effectively by specifying an appropriate pulse-on duration. (C) 2016 The Authors. Published by Elsevier B.V.
引用
收藏
页码:612 / 617
页数:6
相关论文
共 14 条
[1]  
Agarwal S., 2000, P 16 NAT CONV MECH E, P512
[2]  
BORMANN R, 1991, MOD MACH SHOP, V63, P56
[3]  
Kumar S, 2010, P ASME INT MECH ENG
[4]   TOWARDS A BETTER UNDERSTANDING OF THE SURFACE-FEATURES OF ELECTRODISCHARGE MACHINED TOOL STEELS [J].
LEE, LC ;
LIM, LC ;
WONG, YS ;
LU, HH .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1990, 24 :513-523
[5]   SOLIDIFICATION MICROSTRUCTURE OF ELECTRODISCHARGE MACHINED SURFACES OF TOOL STEELS [J].
LIM, LC ;
LEE, LC ;
WONG, YS ;
LU, HH .
MATERIALS SCIENCE AND TECHNOLOGY, 1991, 7 (03) :239-248
[6]   Optimization of machining parameters in WEDM of AISI D3 Steel using Taguchi Technique [J].
Lodhi, Brajesh Kumar ;
Agarwal, Sanjay .
6TH CIRP INTERNATIONAL CONFERENCE ON HIGH PERFORMANCE CUTTING (HPC2014), 2014, 14 :194-199
[7]   An investigation into the actual EDM off-time in SEA machining [J].
Luo, YF .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1998, 74 (1-3) :61-68
[8]   MACROSCOPIC AND MICROSCOPIC PHENOMENA OF ELECTRODISCHARGE MACHINED STEEL SURFACES - AN EXPERIMENTAL INVESTIGATION [J].
MAMALIS, AG ;
VOSNIAKOS, GC ;
VAXEVANIDIS, NM ;
PROHASZKA, J .
JOURNAL OF MECHANICAL WORKING TECHNOLOGY, 1987, 15 (03) :335-356
[9]  
Merdan M.A. E. R., 1991, SURF ENG, V7, P154, DOI [10.1179/sur.1991.7.2.154, DOI 10.1179/SUR.1991.7.2.154]
[10]  
Pandey G, 2012, P 5 CIRP C HIGH PERF, V1, P668