Tool electrode geometry and process parameters influence on different feature geometry and surface quality in electrical discharge machining of AISI H13 steel

2009 ◽  
Vol 22 (4) ◽  
pp. 575-584 ◽  
Author(s):  
Narcis Pellicer ◽  
Joaquim Ciurana ◽  
Jordi Delgado
Keyword(s):  
Surface Quality ◽  
Process Parameters ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Tool Electrode ◽  
Electrode Geometry ◽  
H13 Steel ◽  
Aisi H13 Steel ◽  
Feature Geometry ◽  
Aisi H13

Investigation of nitride layers deposited on annealed AISI H13 steel by die-sinking electrical discharge machining

2020 ◽  
Vol 109 (7-8) ◽  
pp. 2325-2336
Author(s):  
Sinval Pedroso da Silva ◽  
Alexandre Mendes Abrão ◽  
Peter Georg Weidler ◽  
Ernane Rodrigues da Silva ◽  
Marcelo Araújo Câmara
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
H13 Steel ◽  
Aisi H13 Steel ◽  
Aisi H13 ◽  
Nitride Layers

Surface modification of AISI H13 steel by die-sinking electrical discharge machining and TiAlN coating: A promising hybrid technique to improve wear resistance

Wear ◽  
2020 ◽  
Vol 462-463 ◽  
pp. 203509
Author(s):  
Sinval Pedroso da Silva ◽  
Alexandre Mendes Abrão ◽  
Ernane Rodrigues da Silva ◽  
Marcelo Araújo Câmara
Keyword(s):  
Wear Resistance ◽  
Surface Modification ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Hybrid Technique ◽  
H13 Steel ◽  
Tialn Coating ◽  
Aisi H13 Steel ◽  
Aisi H13 ◽  
Improve Wear Resistance

scholarly journals Surface Roughness Analysis of H13 Steel during Electrical Discharge Machining Process Using Cu–TiC Sintered Electrode

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5943
Author(s):  
Arminder Singh Walia ◽  
Vineet Srivastava ◽  
Mayank Garg ◽  
Nalin Somani ◽  
Nitin Kumar Gupta ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Electrical Discharge ◽  
Pulse Current ◽  
Electrical Discharge Machining ◽  
Machining Process ◽  
H13 Steel ◽  
Machined Surface ◽  
Machined Surface Quality ◽  
Semi Empirical

In electrical discharge machining (EDM), the machined surface quality can be affected by the excessive temperature generation during the machining process. To achieve a longer life of the finished part, the machined surface quality plays a key role in maintaining its overall integrity. Surface roughness is an important quality evaluation of a material’s surface that has considerable influence on mechanical performance of the material. Herein, a sintered cermet tooltip with 75% copper and 25% titanium carbide was used as tool electrode for processing H13 steel. The experiments have been performed to investigate the effects of EDM parameters on the machined surface roughness. The findings show that, as the pulse current, pulse length, and pulse interval are increased, the surface roughness tends to rise. The most significant determinant for surface roughness was found to be pulse current. A semi-empirical surface roughness model was created using the characteristics of the EDM technique. Buckingham’s theorem was used to develop a semi-empirical surface roughness prediction model. The semi-empirical model’s predictions were in good agreement with the experimental studies, and the built empirical model based on physical features of the cermet tooltip was tested using dimensional analysis.

scholarly journals Influence of Electrode Material and EDM Parameters on Electrode Wear of AISI H13 Steel

2020 ◽  
Vol 7 (2) ◽  
pp. 13-18
Author(s):  
Mostafa Adel Abdullah ◽  
Nareen Hafidh Obaeed ◽  
Aseil Mohammed Radhi ◽  
Hiba Adil Ahmed
Keyword(s):  
Electrode Material ◽  
Electrical Discharge Machining ◽  
Diesel Oil ◽  
Electrode Wear ◽  
H13 Steel ◽  
Electrically Conducting ◽  
Aisi H13 Steel ◽  
Aisi H13 ◽  
Pulse On Time ◽  
Pulse Off Time

Abstract: Electrical discharge machining (EDM) is a non-traditional process that uses the electrical spark discharge to machine electrically conducting materials for geometrically complex shapes or hard materials. In the current work, cupper and brass were used as the electrode material, and AISI H13 steel as the workpiece. Different input parameters were investigated namely: 20, 30, 40 A current, 50, 100, 150 μs pulse on time, and 1, 3, 6 mm gap. The workpiece thickness was fixed to 4 mm and the pulse off time was 25 μs. All EDM experiments were carried out in diesel oil and the voltage was 140 V. The results showed that the electrode wear decreased with increasing the pulse on time and gap and increased with increasing current for copper and brass electrode. The optimal conditions for minimum tool wear were: pulse on time 150 μs, current 20 A, and gap 6 mm for copper and brass electrodes. Electrode wear is minimum for copper at all parameter values compared to brass electrode.

Experimental Investigation on Manufacturing and Environmental Aspects of Electrical Discharge Machining Process Using Graphite Electrode

2012 ◽  
Vol 433-440 ◽  
pp. 655-659
Author(s):  
S. Thiyagarajan ◽  
S.P. Sivapirakasam ◽  
Jose Mathew ◽  
M. Surianarayanan
Keyword(s):  
Process Parameters ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Process ◽  
Tool Electrode ◽  
Environmental Aspects ◽  
Influence Of Process Parameters ◽  
Peak Current ◽  
Aerosol Emission

This paper presents a study on the influence of process parameters on the manufacturing and environmental aspects of die sinking electrical discharge machining process using graphite as the tool electrode. This investigation included peak current, pulse duration, dielectric level and flushing pressure as the input parameters and aerosol emission rate, material removal rate and tool wear rate as the output parameters. The experiments were planned according to the Taguchi L9 orthogonal array. The effects of process parameters on the output responses were analyzed using main effect plots. Peak current was the most significant process parameter. A discussion on the optimization of process parameters is also presented in this paper.

Surface Alloying of AISI H13 Steel during Electrical Discharge Machining (EDM)

2009 ◽  
Vol 289-292 ◽  
pp. 119-126 ◽  
Author(s):  
Gloria P. Rodriguez ◽  
Jorge Simao ◽  
Gemma Herranz
Keyword(s):  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Steel Substrate ◽  
Tool Electrode ◽  
Surface Alloying ◽  
Tungsten Carbides ◽  
Aisi H13 ◽  
Pulse On Time ◽  
Hydrocarbon Oil

Electrical discharge machining (EDM) is one of the most widely used non-conventional machining processes for the production of moulds/dies, cutting tools and aero-engine parts, such as turbine/compressor blades. The paper details experimental research on the surface alloying/modification of chromium martensitic hot-work tool steel components (AISI H13, 55HRC) during EDM die-sinking operations using powder metallurgy (PM) tool electrodes, as a means of achieving enhanced workpiece wear resistance without resorting to a subsequent coating operation. Tool electrode performance of partially sintered WC/Co electrodes operating in a common hydrocarbon oil dielectric was assessed and subsequently compared with that of conventional electrode materials, such as Cu and Graphite. Surface/subsurface observations by optical and scanning electron microscopy (SEM) showed a recast solidified layer of ~ 8 µm when using WC/Co electrodes. Performed XRD and SEM-EDX analysis indicated that WC and Co contained in the PM tool electrodes, together with C decomposed from the hydrocarbon oil during sparking, were transferred and alloyed to the steel substrate surfaces. EDM surface alloyed layers were hardened over 1200 HK0.025. This hardening is related both to the formation of tungsten carbides with different stoichiometries and to the non-equilibrium microstructure evolution. Thickness of the hardened zone was shown to be dependent on EDM operating parameters, in particular peak-current (A) and pulse on-time (s).

Experimental Research on Small Holes by Electrical Discharge Machining Combined with Ultrasonic Vibration and Assisted Inwall Polish with the Ultrasonic Vibrating

2007 ◽  
Vol 359-360 ◽  
pp. 374-378
Author(s):  
Ming Rang Cao ◽  
Shi Chun Yang ◽  
Wen Hui Li ◽  
Sheng Qiang Yang
Keyword(s):  
Surface Roughness ◽  
Machine Tool ◽  
Surface Quality ◽  
Ultrasonic Vibration ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Small Hole ◽  
Tool Electrode ◽  
One Machine

The EDM can machined some superhard conducting material that cannot be handled by the traditional method, such as carbide alloy, tool steel and engineering materials etc., however, it is also accompanied with slow material removal rate(MRR) and poor surface quality (surface roughness). For some fine machining having rigorous criterion on size and surface roughness, the EDM cannot meet the demand. Some researches indicate that the MRR of small hole by electrical discharge machining combined with ultrasonic vibration (UEDM) can increase in certain range, but the surface quality is still poor. Although there are lots of the researches on the UEDM, some debates on machining mechanism and applied scope existed, and technology of UEDM needs the further study. After small hole machined by the UEDM, it is polished by ultrasonic vibrating. Two steps are includes in this technology. In the first place, on a high velocity electro discharge small hole machine with high-pressure dielectric liquid and hollow electrode, a transducer and horn are attached between the spindle and the electrode. The ultrasonic vibration of the tool electrode is implemented by connecting the horn and the tool electrode together with a chucking appliance. The second, after the small hole is complete, with the same machine tool and tool electrode the process of polishing the inwall of the small hole is carried out by accompanying the ultrasonic vibration, revolution and feed of the tool electrode with the abrasive material. In the experiments, the reference point for UEDM is found and the new theory is proposed to explain the increase of the MRR and the decrease of the surface roughness value .The polish with the ultrasonic vibration can improve further the surface roughness. The ultrasonic vibrating polish after the hole by UEDM is an economical and effective technology, which realizes machining of two procedures in one machine tool. So the process for changing machine tool and tool is not needed any more and the efficiency is further improved.

Sign in / Sign up

Export Citation Format

Share Document