scholarly journals Effect of electrode material on removal efficiency regarding single discharges in wire EDM

2021 ◽  
Author(s):  
Lukas Welschof ◽  
Niklas Schäfer ◽  
Tim Herrig ◽  
Andreas Klink ◽  
Thomas Bergs
Keyword(s):  
Removal Efficiency ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Continuous Process ◽  
Wire Edm ◽  
Procedural Understanding ◽  
Decisive Importance ◽  
Effective Removal ◽  
Coated Wires ◽  
The Individual

AbstractFor the precise machining of demanding materials, wire electrical discharge machining (WEDM) is a flexible and often irreplaceable manufacturing process. In order to enhance productivity as the main focus of the wire EDM process, the advancement of the fundamental procedural understanding is of decisive importance. In order to be able to energetically evaluate the removal process, the individual energetic contributors of the process hence the individual discharges need to be understood in terms of their contribution to material removal. In this paper, an experimental setup is presented, which permits the generation of individual discharges on a modern industrial wire EDM machine tool. For three different wire electrodes, the correlation of the discharge energy and the individual removal volume is quantitatively described, showing that coated wires achieve a significantly higher energy-specific removal. Furthermore the removal efficiency is defined as a key figure to transfer the findings to the continuous process and compare theoretical and effective removal rate.

Development of the Cylindrical Wire Electrical Discharge Machining Process, Part 1: Concept, Design, and Material Removal Rate

2002 ◽  
Vol 124 (3) ◽  
pp. 702-707 ◽  
Author(s):  
Jun Qu ◽  
Albert J. Shih ◽  
Ronald O. Scattergood
Keyword(s):  
Material Removal Rate ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Free Form ◽  
Wire Electrical Discharge Machining ◽  
Wire Edm ◽  
Edm Process ◽  
Cylindrical Wire

Results of applying the wire Electrical Discharge Machining (EDM) process to generate precise cylindrical forms on hard, difficult-to-machine materials are presented. The design of a precise, flexible, and corrosion-resistant underwater rotary spindle is first introduced. A detailed spindle error analysis identifies the major sources of error at different frequency spectrum. The spindle has been added to a conventional two-axis wire EDM machine to enable the generation of free-form cylindrical geometries. The mathematical model for material removal rate of the free-form cylindrical wire EDM process is derived. Experiments were conducted to explore the maximum material removal rate for cylindrical and 2D wire EDM of carbide and brass work-materials. Compared to the conventional 2D wire EDM of the same work-material, higher maximum material removal rates may be achieved in the cylindrical wire EDM, possibly due to better debris flushing condition.

scholarly journals A Study on Optimization of Process Parameters in Machining of Bronze using Wire-EDM

2021 ◽  
pp. 484-493
Author(s):  
Gajanan Kamble ◽  
Dr. N. Lakshamanaswamy ◽  
Gangadhara H S ◽  
Sharon Markus ◽  
N. Rajath
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Parameters ◽  
Wire Edm ◽  
Pulse On Time ◽  
Pulse Off Time

Wire cut electrical discharge machining (WEDM) is a hybrid manufacturing technology which enables machining of all engineering materials. This research article deals with investigation on Optimization of the Process Parameters of the wire cut EDM of Bronze material of dimension (80*80*40) in mm. Material removal rate, Surface roughness and Kerf width were studied against the process parameters such as Pulse on time(TON), Pulse off time (TOFF) and Current(IP). The machining parameters for wire EDM were optimized for achieving the combined objectives. As there are three input parameters 27 experiments is carried out and full factorial is used. Optimized parameters were found using (ANOVA) and the error percentage can be validated and parameter contribution for the Material removal rate (MRR) and Surface roughness were found.

Removal of Zn (II) from Aqueous Solution by Copolymer of Grafting Acrylic Acid onto Deacetylated Konjac Glucomannan

2009 ◽  
Vol 620-622 ◽  
pp. 611-614
Author(s):  
Feng Liu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Removal Efficiency ◽  
Adsorption Process ◽  
Removal Rate ◽  
Konjac Glucomannan ◽  
Operational Parameters ◽  
Effective Removal ◽  
Isotherm Adsorption ◽  
Solid Liquid Interface

Removal of Zn (II) from aqueous solution by copolymer of grafting acrylic acid onto deacetylated konjac glucomannan (GADKGM) was evaluated in a bath adsorption system. Operational parameters such as pH, time, temperature and initial concentration were studied in present work. The adsorption process was relatively fast and highly effective. Removal efficiency for Zn(II) solution at the concentration of 100 mg/L was 98% at optimum operational pH of 6. The removal rate for Zn(II) on GADKGM was very fast and the removal efficiency can attain about 90% within 5 min. Isotherm adsorption data were described by Langmuir model with monolayer adsorption capacity of 125 mg/g. The negative values of thermodynamic parameters of △Go and △So indicated that adsorption process was a spontaneous process and randomness at the solid/liquid interface was decreased during the adsorption process.

scholarly journals Phytoremediation of nitrate contaminated water using ornamental plants

2019 ◽  
Vol 68 (8) ◽  
pp. 731-743 ◽  
Author(s):  
S. Shyamala ◽  
N. Arul Manikandan ◽  
Kannan Pakshirajan ◽  
Van Tai Tang ◽  
Eldon R. Rene ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Plant Density ◽  
Removal Rate ◽  
Nitrate Removal ◽  
Ornamental Plants ◽  
Growth Period ◽  
Interaction Effects ◽  
High Plant Density ◽  
Individual Effects ◽  
The Individual

Abstract This work aims at evaluating the potential of two ornamental plant species, i.e., money plant (Epiprennum aureum) and arrowhead plant (Syngonium podophyllum), to treat nitrate containing wastewater. Statistically designed experiments were performed to ascertain the effect of initial nitrate concentration (40–120 mg/L), growth period (1–12 days) and plant density (20–80 g/L) on nitrate removal. Based on the results of analysis of variance (ANOVA), it was observed that the individual effects (F = 78.04 and P = 0.013) of process parameters influenced the nitrate removal efficiency by money plant stronger than the 2-way (F = 0.2 and P = 0.89) and 3-way interaction effects (F = 0.46 and P = 0.569). In the case of the arrowhead plant, the individual effects significantly affected the nitrate removal efficiency than the 2-way and 3-way interaction effects. Low nitrate concentrations (40 mg/L) and high plant density (80 g/L), showed ∼88% nitrate removal by arrowhead plant, during a growth period of 6 d. On the contrary, under similar conditions, the money plant showed a nitrate removal efficiency of ∼93% during a growth period of 12 d. Concerning the removal kinetics, an increase in the growth period increased the nitrate removal rate for both the plants.

Evaluation of Optimal Parameters for Machining Aluminium Alloy Al6061 in Wire EDM

2014 ◽  
Vol 592-594 ◽  
pp. 282-288
Author(s):  
T. Bharathy ◽  
K. Thiruppathi ◽  
S. Raghuraman
Keyword(s):  
Aluminium Alloy ◽  
Process Parameters ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Objective Measure ◽  
Wire Edm ◽  
Machined Surface ◽  
Optimization Of Process Parameters ◽  
Grey Relational Grade ◽  
Grey Relational

This paper discuss on the optimization of process parameters for the machining of Al6061 aluminium alloy in Wire Electrical Discharge Machining (WEDM). Al6061 has a significant use in various domains like aerospace, ordnance, and automotive sectors. Wire EDM is used in the fields of Dies, Moulds Precision Manufacturing and contour cutting. The experiments have been conducted by varying four process parameters such as Peak current, Ton, Toffand Servo feed in three different levels. The important output measurable parameters like material removal rate (MRR), Surface roughness (Ra) value of the machined surface for each experimental runs has been measured. Taguchi’s L9(34) Orthogonal Array was employed to carry on the experiments, that agree with arbitrarily opted distinct combinations of the mentioned process parameter. All experiments have been conducted using Electronica Sprintcut WEDM. Grey relational analysis was employed to change over the multi-objective measure into a tantamount individual objective function. Taguchi technique was used to optimize the overall grey relational grade. Verification experiments were done to validate the optimal results.

scholarly journals Clay-Polymer Nanocomposites: Preparations and Utilization for Pollutants Removal

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1365 ◽  
Author(s):  
Abdelfattah Amari ◽  
Fatimah Mohammed Alzahrani ◽  
Khadijah Mohammedsaleh Katubi ◽  
Norah Salem Alsaiari ◽  
Mohamed A. Tahoon ◽  
...  
Keyword(s):  
Water Treatment ◽  
Clay Minerals ◽  
Removal Rate ◽  
Polymeric Materials ◽  
Cost Effective ◽  
Inorganic Contaminants ◽  
Effective Removal ◽  
Pollutants Removal ◽  
The Individual ◽  
Clay Materials

Nowadays, people over the world face severe water scarcity despite the presence of several water sources. Adsorption is considered as the most efficient technique for the treatment of water containing biological, organic, and inorganic contaminants. For this purpose, materials from various origins (clay minerals, modified clays, zeolites, activated carbon, polymeric resins, etc.) have been considered as adsorbent for contaminants. Despite their cheapness and valuable properties, the use of clay minerals as adsorbent for wastewater treatment is limited due to many factors (low surface area, regeneration, and recovery limit, etc.). However, clay mineral can be used to enhance the performance of polymeric materials. The combination of clay minerals and polymers produces clay-polymers nanocomposites (CPNs) with advanced properties useful for pollutants removal. CPNs received a lot of attention for their efficient removal rate of various organic and inorganic contaminants via flocculation and adsorption ability. Three main classes of CPNs were developed (exfoliated nanocomposites (NCs), intercalated nanocomposites, and phase-separated microcomposites). The improved materials can be explored as novel and cost-effective adsorbents for the removal of organic and inorganic pollutants from water/wastewater. The literature reported the ability of CPNs to remove various pollutants such as bacteria, metals, phenol, tannic acid, pesticides, dyes, etc. CPNs showed higher adsorption capacity and efficient water treatment compared to the individual components. Moreover, CPNs offered better regeneration than clay materials. The present paper summarizes the different types of clay-polymers nanocomposites and their effective removal of different contaminants from water. Based on various criteria, CPNs future as promising adsorbent for water treatment is discussed.

Machining of WC-Co Composites - A Review

2014 ◽  
Vol 808 ◽  
pp. 51-64 ◽  
Author(s):  
Ravinder Kataria ◽  
Jatinder Kumar
Keyword(s):  
Material Removal ◽  
High Performance ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
High Hardness ◽  
Cobalt Content ◽  
Wire Edm ◽  
Machining Processes ◽  
High Mechanical Strength ◽  
Conventional Machining

This article aims to present a review on the machining of tungsten carbide-cobalt composite material. WC-Co based materials are extensively used where the demand for high performance materials exists because these have the distinguished set of properties such as high hardness, superior wear resistance, high mechanical strength and good dimensional stability. Due to these excellent properties, it serves most applications in the field of tool and die making. Machining of the WC-Co materials is very difficult with conventional machining processes and results in poor surface finish, low material removal rate, high machining cost. Among all non-conventional machining processes, thermal energy based processes such as Electrical discharge machining, Wire EDM are most widely used to machine these materials. The machining of WC-Co is also affected by various factors such as the cobalt content and grain size and presence of other carbides. This paper attempts to critically review all these aspects of the machining of WC-CO composites.

ANALISA RSM (RESPONSE SURFACE METHODOLOGY) DENGAN VARIASI WIRESPEED, INTERPULSE, DAN ARUS TERHADAP MATERIAL REMOVAL RATE DAN KEKASARAN PERMUKAAN PADA PROSES WIRE - EDM

ROTOR ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 5
Author(s):  
Arif Efendi
Keyword(s):  
Surface Roughness ◽  
Response Surface ◽  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
Machining Process ◽  
Wire Edm ◽  
Optimum Result ◽  
The Impact

ABSTRACT     In this era, the machining process has been very advanced wich is equipped with advanced technologies. The impact of the machining process used to develop and increase quality and quantity product produce. Machining process wire – EDM (Wire Cutting Electrical Discharge Machining) is one of the non – conventional machining process wich is commonly used in die – mold, disk brake, punch, and cutting tools. The speed of MRR (Material Removal Rate) and the smoothness of a surface has a very important role in a product wich concerns lubrication, wear, friction and resistance problems. Based on the problem, a study was research for find out what variables affetc the response variable. From the result of the study it is known that the current and interpulse affected the MRR, and the current, interpulse, and wirespeed also affect surface roughness. With the RSM (Response Surface Methode) methode optimum result for MRR the fasted 64,5688 mm3/minutes and the surface roughness smoothest 5,2391 µm with the combination variable current is 8 amp, interpulse, 7 µs, and wirespeed 5 mm/s. Keywords: Wire – EDM, Response Surface Methode (RSM), Material Removal Rate (MRR), surface roughness

Effect of Powder-Mixed Dielectric on EDM Process Performance

2020 ◽  
Vol 38 (8A) ◽  
pp. 1226-1235
Author(s):  
Safa R. Fadhil ◽  
Shukry. H. Aghdeab
Keyword(s):  
Silicon Carbide ◽  
High Speed ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
High Speed Steel ◽  
Transformer Oil ◽  
Dielectric Fluid ◽  
Peak Current ◽  
Powder Concentration ◽  
Pulse On Time

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration of machining High-speed steel (HSS)/(M2) on the material removal rate (MRR), tool wear rate (TWR) and the surface roughness (Ra). Experiments have been designed and analyzed using Response Surface Methodology (RSM) approach by adopting a face-centered central composite design (FCCD). It is found that added graphite-silicon carbide mixing powder to the dielectric fluid enhanced the MRR and Ra as well as reduced the TWR at various conditions. Maximum MRR was (0.492 g/min) obtained at a peak current of (24 A), pulse on (100 µs), and powder concentration (10 g/l), minimum TWR was (0.00126 g/min) at (10 A, 100 µs, and 10 g/l), and better Ra was (3.51 µm) at (10 A, 50 µs, and 10 g/l).

Effect of SiC-Cu Electrode on Material Removal Rate, Tool Wear and Surface Roughness in EDM Process

2020 ◽  
Vol 38 (9A) ◽  
pp. 1406-1413
Author(s):  
Yousif Q. Laibia ◽  
Saad K. Shather
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Material Removal Rate ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Removal Rate ◽  
304 Stainless Steel ◽  
Tool Electrode ◽  
Pulse Time ◽  
Edm Process

Electrical discharge machining (EDM) is one of the most common non-traditional processes for the manufacture of high precision parts and complex shapes. The EDM process depends on the heat energy between the work material and the tool electrode. This study focused on the material removal rate (MRR), the surface roughness, and tool wear in a 304 stainless steel EDM. The composite electrode consisted of copper (Cu) and silicon carbide (SiC). The current effects imposed on the working material, as well as the pulses that change over time during the experiment. When the current used is (8, 5, 3, 2, 1.5) A, the pulse time used is (12, 25) μs and the size of the space used is (1) mm. Optimum surface roughness under a current of 1.5 A and the pulse time of 25 μs with a maximum MRR of 8 A and the pulse duration of 25 μs.

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