scholarly journals ANALISIS OPTIMASI KETELITIAN DIMENSI, KEKASARAN PERMUKAAN DAN LAJU KEAUSAN ELEKTRODE PADA PROSES ELECTRIC DISCHARGE MACHINING DENGAN METODE TAGUCHI MULTI RESPON

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
Edy Sulistiyawan
Keyword(s):  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Electric Discharge Machining ◽  
Time Pulse

Electrical Discharge Machining (EDM) adalah mesin non konvensi-onal yang bekerja berdasarkan terjadinya loncatan bunga api secara periodik dari elektrode ke benda kerja. Pada penelitian ini variabel-variabel bebas yang diteliti merupakan faktor-faktor yang dapat dikendalikan pada setting mesin yaitu arus, on-time pulse, dan tegangan, serta masing-masing variabel mempunyai tiga taraf pengamatan. Percobaan utama dilaksanakan dengan menggunakan rancangan OA L27. Analisis data dilakukan dengan pendekatan konvensional Taguchi untuk optimasi respon satu per satu dan aplikasi prosedur TOPSIS untuk memperoleh suatu standart setting yang dapat mengoptimumkan ketiga respon secara sekaligus. Hasil penelitian diperoleh bahwa respon kekasaran permukaan, laju keausan elektrode dan ketelitian dimensi dipengaruhi oleh faktor-faktor utama yaitu arus, on-time pulse, dan tegangan serta interaksi dua faktor yai tu antara arus dan tegangan. Kombinasi taraf faktor yang menghasilkan ketiga respon yang optimum adalah setting mesin dengan arus 3A, on-time pulse 100 dan tegangan 70 volt. Sedangkan estimasi harga kekasaran permukaan optimum yang diperoleh adalah sebesar 1.24 , dan interval kepercayaan 90% diperoleh range antara 1.17 sampai 1.33 . Untuk respon laju keausan elektrode diperoleh estimasi harga yang optimum sebesar 0.0096 mm3/dtk, dan dengan interval kepercayaan 90% diperoleh range antara 0.0078 mm3/dtk sampai 0.0018 mm3/dtk. Dan untuk respon keteli tian dimensi diperoleh estimasi harga yang optimum sebesar 0.0354mm, dan interval estimasi harga yang optimum sebesar 0.0354mm, dan interval kepercayaan 90% diperoleh range antara 0.0325mm sampai 0.0387mm.

Effects of Machining Fluid on Electric Discharge Machining of SiC Ingot

2014 ◽  
Vol 778-780 ◽  
pp. 767-770 ◽  
Author(s):  
Norimasa Yamamoto ◽  
Satarou Yamaguchi ◽  
Tomohisa Kato
Keyword(s):  
Surface Roughness ◽  
Silicon Carbide ◽  
Ion Exchange ◽  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Electric Discharge Machining ◽  
The Wire ◽  
Characteristic Features ◽  
First Time

Recently, ingots of silicon carbide have been adapted to be sliced by the wire-cut electrical discharge machining. Fast slicing, and the reduction in the loss are important for slicing of the wafer. In this paper, characteristic features of the electric discharge machining in the ion-exchange water and the fluorine-based fluid were compared for these improvement. The discharge was caused by a pulse voltage applied to a ingot of silicon carbide and the wire in machining fluid, and the slicing was proceeded. As a result, improvement of surface roughness and kerf loss was confirmed, for the first time. In addition, the improving methods for fast slicing were considered.

Electrode Material Effect on Electrical Discharge Machining PcBN Cutting Tool Processing

2011 ◽  
Vol 399-401 ◽  
pp. 1667-1671 ◽  
Author(s):  
Yun Hai Jia
Keyword(s):  
Surface Quality ◽  
Electric Discharge ◽  
Electrode Material ◽  
Electrical Discharge ◽  
Electrode Materials ◽  
Cutting Tool ◽  
Electrical Discharge Machining ◽  
Copper Electrode ◽  
Electric Discharge Machining ◽  
Tool Surface

The electrode material is playing the very important role in the electrical discharge machining. Two kinds of electrode materials common used in EDM are compared and analyses similarities and differences in structure and physical characteristics. Combined with PcBN tool machining tests, from the electric discharge machining efficiency, electrode wear, tool surface quality, tool surface degenerating layer, machining results are in analysis and comparison, and then different electrode materials machining technics in electrical discharge machining process are summarized. Through the cutting tool electric discharge machining experiments, we can know that the graphite electrode easy to take shape, suits in the complex edge's cutting tool electric discharge machining, under the same electric discharge machining parameter condition, its processing efficiency must be higher than the copper electrode, but the electrode loses, the cutting tool surface quality and affect layer thickness are to be worse than the copper electrode.

Thermal and Mechanical Influence of Ultrasonically Aided Electrical Discharge Machining on Co-Cr Alloys

2020 ◽  
Vol 1157 ◽  
pp. 93-107
Author(s):  
Bogdan Ionuț Cristea ◽  
Daniel Ghiculescu ◽  
Dumitru Mnerie
Keyword(s):  
Experimental Data ◽  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Comsol Multiphysics ◽  
Removal Mechanism ◽  
Electric Discharge Machining ◽  
Mechanical Influence

The paper reviews machining of CoCr alloys by electric discharge machining and ultrasonic aided discharge machining. The removal mechanism is discussed, modeled with Comsol Multiphysics and validated using experimental data.

Optimization of Processing Conditions on the Wire Electric Discharge Machining by the Parameters of Vibro-Acoustic Signal

2016 ◽  
Vol 876 ◽  
pp. 36-42 ◽  
Author(s):  
Sergey Nikolaevich Grigoriev ◽  
Mikhail Pavlovich Kozochkin ◽  
Artur Nikolaevich Porvatov
Keyword(s):  
Electric Discharge ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Pulsed Laser ◽  
Acoustic Signals ◽  
Processing Conditions ◽  
Electric Discharge Machining ◽  
Spark Erosion ◽  
Wire Electric Discharge Machining

The results of the research of vibro-acoustic signals, accompanying the processes of electrical discharge machining and pulsed laser treatment, are presented in this article. It is shown that the monitoring parameters of vibro-acoustic signals can improve the quality of management spark erosion equipment.

Experimental Evaluation on Corner Accuracy in WEDM for Aluminium 6061 Alloy

2021 ◽  
pp. 96-113
Author(s):  
Debal Pramanik ◽  
Dipankar Bose
Keyword(s):  
Electrical Discharge ◽  
Thermal Process ◽  
Electrical Discharge Machining ◽  
Sharp Corner ◽  
Proposed Model ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Off Time ◽  
Wire Feed ◽  
Time Pulse

An important electro-thermal process known as wire electrical discharge machining (WEDM) is applied for machining of conductive materials to generate most precisely. All cutting inaccuracies of WEDM arise out of the major cause of wire bending. At the time of cutting a sharp corner or cut profile, bending of the wire leads to a geometrical error on the workpiece. Though this type of error may be of a few hundred microns, it is not suitable for micro applications. In this research study, an experimental investigation based on response surface methodology (RSM) has been done on wire EDM of Aluminium 6061 t6 alloy. This chapter studies the outcome of input process variables (i.e., wire feed rate, pulse on time, pulse off time, and gap voltage) on machining output responses (i.e., corner inaccuracy) extensively. Experimental validation of the proposed model shows that corner inaccuracy value may be reduced by modification of input parameters.

Design and Experimental Investigation on High Efficient Horizontal Micro Electrical Discharge Machine

2013 ◽  
Vol 456 ◽  
pp. 32-37
Author(s):  
Xia Yun Shu ◽  
Hong Hai Zhang
Keyword(s):  
Electric Discharge ◽  
Electrical Discharge ◽  
Influence Factor ◽  
Electrical Discharge Machining ◽  
Electrical Discharge Machine ◽  
Examination System ◽  
Micro Electrical Discharge Machining ◽  
Grinding Method ◽  
High Efficient ◽  
Discharge Machine

Micro-electrical discharge machining is a non-contact manufacturing process without macroscopic force. Microelectrode fabrication is the fundamental and influence factor of micro electric discharge machining. As for the efficiency of microelectrode fabrication, this paper proposed a fast online microelectrode fabrication method by an efficient horizontal micro electric discharge machine, in which an online diamond wheel ultra-precision grinding method and an online wire electrical discharge grinding method is combined to fabricate microelectrode. Machine designed in this paper consist of a CCD online dimension examination system, precision motion and feeding system, nanosecond-pulse independent discharged power supply and gap state-detection system. experimental study on microelectrode, micro nozzle fabrication and microstructure milling by the machine conducted. Microelectrode with 15 micrometers in diameter and micro hole with 50 micrometers in diameter are done in experiment. Results show that the composite method improves the efficiency of micro electrical discharge machining.

scholarly journals Study on the Influence of Metallic Powder in Near-Dry Electric Discharge Machining

2020 ◽  
Vol 66 (4) ◽  
pp. 243-253 ◽  
Author(s):  
Sanjay Sundriyal ◽  
Vipin ◽  
Ravinderjit Singh Walia
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Dielectric Medium ◽  
Metallic Powder ◽  
Machining Process ◽  
Electric Discharge Machining ◽  
En 31 ◽  
Edm Process ◽  
Dry Electrical Discharge Machining

Near-dry electrical discharge machining (ND-EDM) is an eco-friendly process. In this study, an approach has been made to make the machining process more efficient than ND-EDM with the addition of metallic powder with the dielectric medium to machine EN-31 die steel. Powdermixed near-dry EDM (PMND-EDM) has several advantages over the ND-EDM or conventional electrical discharge machining (EDM) process, such as a higher material removal rate (MRR), fine surface finish (Ra), sharp cutting edge, lesser recast layer, and lower deposition of debris. The output response variables are MRR, Ra, residual stress (RS) and micro-hardness (MH) of the machined surfaces. Further study of the workpiece was performed, and a comparative study was conducted between ND-EDM and PMND-EDM. In this proposed method of machining, the MRR, Ra, and MH increased by 17.85 %, 16.36 %, and 62.69 % while RS was reduced by 56.09 %.

scholarly journals Parametric Study for Wire Cut Electrical Discharge Machining of Sintered Titanium

2019 ◽  
Vol 69 (1) ◽  
pp. 17-38 ◽  
Author(s):  
De Dwaipayan ◽  
Nandi Titas ◽  
Bandyopadhyay Asish
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Sintered Titanium ◽  
Wire Tension ◽  
Input Parameters ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Off Time ◽  
Wire Feed ◽  
Time Pulse

AbstractIn 21st century, it has been observed that Wire Cut Electrical Discharge Machining (WEDM) has evolved as one of the most important non-traditional machining process. The popularity and its success lies because of its uniqueness towards producing different components which are very difficult to machine like titanium, tungsten carbide, Inconel materials etc and provides a platform in producing intricate complex shape which in many cases become impossible to machine by traditional machining methods. Pure sintered titanium bears very high specific strength, abrasion and corrosion resistances and thus machining this type of materials by conventional techniques becomes very difficult though this material finds immense applications in bio-plant and aerospace components. In the present work, WEDM on pure sintered titanium is studied. The different input parameters of WEDM like, pulse on time, pulse off time, wire tension and wire feed have been varied to investigate the output response like MRR, Surface Roughness (Ra), Kerf Width and Over Cut. A response surface methodology (4 factors 3 level) design of experiment (DOE) has been applied in this context to examine the machining ability of pure sintered titanium and results are found to be satisfactory and verified by confirmatory test. The machining parameters like pulse on time, pulse off time, wire tension and wire feed shows immense effect on the output responses and present study provide an optimal conditions of these input parameters to get the best output responses through RSM

Study the Effects of Dielectric Type on the Machining Characteristics of γ-Ti Al in Electrical Discharge Machining

2017 ◽  
Vol 33 ◽  
pp. 40-49
Author(s):  
Mohammad Reza Shabgard ◽  
Hossein Faraji ◽  
Behnam Khosrozade ◽  
Hadi Eivazi-Bagheri ◽  
Keivan Amini
Keyword(s):  
Intermetallic Compound ◽  
Tool Wear ◽  
Electric Discharge ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Surface Characteristics ◽  
Deionized Water ◽  
Surface Cracks ◽  
Electric Discharge Machining ◽  
Tool Wear Ratio

The current study surveys the results of using deionized water and kerosene as dielectrics in the machining outputs of γ-TiAl intermetallic compound obtained in electric discharge machining. Influences of these different dielectrics properties on machining speed, tool wear, surface cracks and roughness were compared. Scanning electron microscopy micrographs were prepared to investigate influences of dielectrics on the surface characteristics of electrically discharged samples. Results indicate which by kerosene dielectric; the material removal rate (MRR) is further compared to another one. But deionized water as dielectric causes higher tool wear ratio than kerosene dielectric. Electrical discharged samples in deionized water have higher surface roughness, in addition it contains surface cracks, whereas kerosene dielectric results better surface finish in low pulse current. According to XRD spectra electric discharge machining in deionized water and kerosene dielectrics produces Ti3 Al intermetallic compound on the produced surface.

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