scholarly journals Abrasive blast surface finish after the wire electrical discharge machining (WEDM)

Mechanik ◽  
2015 ◽  
pp. 710/80-710/83
Author(s):  
Lucjan Dąbrowski ◽  
Mieczysław Marciniak ◽  
Dorota Oniszczuk-Świercz
Keyword(s):  
Surface Finish ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Wire Electrical Discharge Machining ◽  
The Wire

scholarly journals Influence of Energy Parameters of Micro WEDM on Kerf

2012 ◽  
Vol 576 ◽  
pp. 527-530
Author(s):  
Mohammad Yeakub Ali ◽  
W.Y.H. Liew ◽  
S.A. Gure ◽  
B. Asfana
Keyword(s):  
Experimental Data ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Kerf Width ◽  
Wire Electrical Discharge Machining ◽  
Machining Parameters ◽  
Wire Electrode ◽  
Wire Vibration ◽  
The Wire ◽  
Micro Wedm

This paper presents the estimation of kerf width in micro wire electrical discharge machining (micro WEDM) in terms of machining parameters of capacitance and gap voltage. An empirical model is developed by the analysis of variance (ANOVA) of experimental data. Using a wire electrode of 70 µm diameter, a minimum kerf width is found to be 92 µm for the micro WEDM parameters of 0.01 µF capacitance and 90.25 V gap voltage. Around 30% increament of the kerf is found to be high. The analysis also revealed that the capacitance is more influential parameter than gap voltage on kerf width produced by micro WEDM. As the gap voltage determines the breakdown distance and affects the wire vibration, the wire vibration factor is to be considered in the analysis and in formulation of model in future study.

scholarly journals Wire Electrical Discharge Machining—A Review

Machines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 69
Author(s):  
Laurenţiu Slătineanu ◽  
Oana Dodun ◽  
Margareta Coteaţă ◽  
Gheorghe Nagîţ ◽  
Irina Beşliu Băncescu ◽  
...  
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Machining Process ◽  
Wire Electrical Discharge Machining ◽  
Wire Electrode ◽  
Machining Processes ◽  
Scientific Papers ◽  
The Wire ◽  
Machining Productivity ◽  
Machined Surfaces

Wire electrical discharge machining has appeared mainly in response to the need for detachment with sufficiently high accuracy of parts of plate-type workpieces. The improvements introduced later allowed the extension of this machining technology to obtain more complex ruled surfaces with increasingly high requirements regarding the quality of the machined surfaces and the productivity of the wire electrical discharge machining process. Therefore, it was normal for researchers to be interested in developing more and more in-depth investigations into the various aspects of wire electrical discharge machining. These studies focused first on improving the machining equipment, wire electrodes, and the devices used to position the clamping of a wire electrode and workpiece. A second objective pursued was determining the most suitable conditions for developing the machining process for certain proper situations. As output parameters, the machining productivity, the accuracy, and roughness of the machined surfaces, the wear of the wire electrode, and the changes generated in the surface layer obtained by machining were taken into account. There is a large number of scientific papers that have addressed issues related to wire electrical discharge machining. The authors aimed to reveal the aspects that characterize the process, phenomena, performances, and evolution trends specific to the wire electrical discharge machining processes, as they result from scientific works published mainly in the last two decades.

scholarly journals Understanding the wire electrical discharge machining of Ti6Al4V alloy

Heliyon ◽  
2019 ◽  
Vol 5 (4) ◽  
pp. e01473 ◽  
Author(s):  
A. Pramanik ◽  
A.K. Basak ◽  
C. Prakash
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Ti6al4v Alloy ◽  
Wire Electrical Discharge Machining ◽  
The Wire

Modelling Surface Finish in Wire Electrical Discharge Machining of 9CrSi Tool Steel

2018 ◽  
Vol 61 (2) ◽  
pp. 72-74
Author(s):  
Tran Anh Duc ◽  
◽  
Nguyen Manh Cuong ◽  
Luu Anh Tung ◽  
Le Xuan Hung ◽  
...  
Keyword(s):  
Tool Steel ◽  
Surface Finish ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Wire Electrical Discharge Machining

scholarly journals Study on Surface Evenness of Super-high-thickness Cutting in High-speed Wire Electrical Discharge Machining

2021 ◽  
Author(s):  
Cong Deng ◽  
Zhidong Liu ◽  
Ming Zhang ◽  
Hongwei Pan ◽  
Mingbo Qiu
Keyword(s):  
Electrical Discharge ◽  
High Speed ◽  
Electrical Discharge Machining ◽  
Point Of View ◽  
Working Fluid ◽  
Wire Electrical Discharge Machining ◽  
Wire Electrode ◽  
Positional Accuracy ◽  
Vibration Absorption ◽  
The Wire

Abstract Surface machined by high-speed wire electrical discharge machining (HS-WEDM) at super-high thickness (more than 1000 mm) cutting suffers from uneven surface, a major problem that has been investigated in this paper. According to the analysis, as wire frame span increases, the rigidity of the wire electrode decreases, and under the action of discharge explosive force, wire electrode vibration intensifies. As a result, the machining stability inevitably decreases. However, the core problem is whether there is enough working fluid in the slit to dampen and absorb the vibration of the wire electrode so as to ensure the positional stability of the wire electrode. To verify the above point of view: first, the wire guide and gravity take-up with bidirectional tension in the wire feeding system were installed to improve the positional accuracy of the wire electrode; second, to improve the flow of the working fluid into the slit, the slit width was increased by improving the working fluid and a medium carrier with a higher melting point and vaporization point can reduce the vaporization of the working fluid in the slit as much as possible. The experiment showed that the outlet flow of the improved working fluid is 56.72% higher than that of the original working fluid when cutting a 750 mm thick workpiece, which increases the damping and vibration absorption effect of the working fluid on the wire electrode in the long and narrow gap. After the above measures were implemented, super-high thickness cutting can be carried out continuously and steadily, the surface evenness was significantly improved, and the workpiece with a thickness of 2000 mm was cut successfully.

Effect of Wire Electrode Materials on Performance Characteristics for Wire Electrical Discharge Machining of Metal Matrix Composite Material

2020 ◽  
Author(s):  
Gurupavan Hurugalavadi Ramu ◽  
Holalu Venkatadas Ravindra ◽  
Devegowda Tadagavadi Muddegowda
Keyword(s):  
Silicon Carbide ◽  
Composite Materials ◽  
Surface Finish ◽  
Metal Matrix ◽  
Electrical Discharge ◽  
Electrode Materials ◽  
Electrical Discharge Machining ◽  
Electrode Wear ◽  
Wire Electrical Discharge Machining ◽  
Brass Wire

Abstract Composite materials are the advanced materials which are widely used in manufacturing industries. The most commonly used composite materials are metal matrix composites. Due to the presence of abrasive reinforcing particles, traditional machining of these causes severe tool wear and hence reduces the life of cutting tool. Wire electrical discharge machining (WEDM) is quite successful for machining of metal matrix composites. Wire Electrical Discharge machining is a specialized thermal machining process capable of accurately machining parts of hard materials with complex shapes. One of the main research fields in WEDM is related to the improvement of the process productivity by avoiding wire breakage. Wire electrodes used in WEDM are the core of the system. In this study the effect of different wire electrode materials on electrode wear and surface finish for wire electrical discharge machining of metal matrix composite material were investigated. The experiments were conducted under the following process parameters viz., pulse-on time, pulse-off time, wire feed speed and current. For the experiment the aluminium 6061 alloy with 0%, 5%, and 10% of silicon carbide (SiC) reinforcement material was used. To conduct the experiment CNC wire EDM machine with two different wires viz., molybdenum and brass wire was used. Experimental results indicate that for better surface finish of Al6061 alloy, the brass wire is more suitable. The use of brass wire as electrode material leads to significant reduction in electrode wear in machining of Al-5%SiC and Al-10%SiC composite materials compare to molybdenum wire. Increasing percentage of silicon carbide in aluminium 6061 alloy increases the variation in surface finish and electrode wear. Wire wear rate of both brass and molybdenum wire is increased with increase in percentage of silicon carbide.

Development of the Cylindrical Wire Electrical Discharge Machining Process

2001 ◽  
Author(s):  
Jun Qu ◽  
Albert J. Shih ◽  
Ron Scattergood
Keyword(s):  
Surface Finish ◽  
Electrical Discharge ◽  
Material Removal ◽  
Electrical Discharge Machining ◽  
Machining Process ◽  
Free Form ◽  
Wire Electrical Discharge Machining ◽  
Wire Edm ◽  
Cylindrical Workpiece ◽  
Cylindrical Wire

Abstract 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 an underwater rotary spindle is first introduced. The spindle is added to a conventional two-axis wire EDM machine to enable the generation of free-form cylindrical geometry. Mathematical models for material removal rate and surface finish in cylindrical wire EDM of the free-form cylindrical workpiece are derived. Experiments are conducted for cylindrical and 2D wire EDM of brass and carbide work-materials. Comparing to the conventional 2D wire EDM of the same work-material, higher maximum material removal rates could be achieved in the cylindrical wire EDM. The surface finish and roundness of parts generated by cylindrical wire EDM at different part rotational speeds and wire traverse speeds are measured and analyzed.

Analysis of wire erosion and workpiece surface roughness in wire electrical discharge machining

2003 ◽  
Vol 217 (5) ◽  
pp. 633-642 ◽  
Author(s):  
N Tosun ◽  
C Cogun
Keyword(s):  
Surface Roughness ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Open Circuit ◽  
Wire Electrical Discharge Machining ◽  
Machining Parameters ◽  
Workpiece Surface ◽  
The Wire ◽  
Dielectric Flushing ◽  
Wire Wear

In this study, the effects of machining parameters on the wire wear, on the size of erosion craters on the wire and on the workpiece surface roughness were investigated experimentally in wire electrical discharge machining (WEDM). An attempt was made to correlate the crater volume and the pulse energy. The experiments were conducted under different settings of pulse duration, open-circuit voltage, wire speed and dielectric flushing pressure. The variations of the wire wear, the size of erosion craters on the wire and the workpiece surface roughness with machining parameters were modelled mathematically by using regression analysis. The relationship between the workpiece surface roughness and the crater size was established. The analysis of variance (ANOVA) and F-test were performed to obtain statistically significant process parameters and the percentage contribution of these parameters to the performance outputs.

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