Enhancement of the Micro-EDM Process for Drilling Through-holes

Bellotti, Mattia; Qian, Jun; Reynaerts, Dominiek

doi:10.1016/j.procir.2017.12.123

Cited by 26 publications

(11 citation statements)

References 14 publications

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“…They are characterized by the type of micro-EDMand the optimization method used. Belloti, Qian, & Reynaerts, 2018 Enhancement of the micro-EDM process for drilling through-holes…”

Section: Search Resultsmentioning

confidence: 99%

“…The ANOVA for the grey relational grades proved that the most insignificant factors for micro-EDM milling of Ti 6 Al 4 V were pulse off time 43.31 % and current discharge 31.25 %. Belloti et al (2018) decided to choose a large number of machining factors: Pulse width (μs), Frequency kHz, Current (index), Open Voltage (V), Reference Discharge Voltage(V) and Gain, all at 2 levels, and they based their design of experiment on an L32 orthogonal array. They found that the most relevant factor influencing both MRR and TWR was the open voltage.…”

Section: Grey Relational Analysis-taguchi Methodsmentioning

confidence: 99%

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Optimization of Micro-Electrical Discharge Machining Parameters of Ti6AL4V Component: A Mapping Study

Apostolopoulou¹,

Al-Juboori²

2019

JMR

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The micro-Electrical Discharge Machining (micro-EDM) is a non-conventional machining process which utilizes electro-thermal, non-contact effects to remove material from the workpiece. Micro-EDM is controlled by many machining parameters and its accuracy is evaluated by performance measures. It is employed when high accuracy and precision are required, especially when difficult-to-machine materials, like titanium alloy Ti6Al4V, are involved. Given the tremendous applications of Ti6Al4V in biomedical devices, automotive, aerospace and microelectromechanical systems, it is valuable to examine thoroughly the micro-EDM of Ti6Al4V component. This work reports a systematic mapping study of 36 papers published in journals and proceedings of conferences in the nearly two decades 2000-2018. First, we divide the papers into categories according to the various optimization techniques applied for the enhancement of micro-EDM machining process of Ti6Al4V component. Then, we discuss the techniques most used and give insight into the current research trends in micro-EDM. Accompanying comments about the use of the mentioned studies for teaching purposes may be of considerable interest for educators.

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“…They are characterized by the type of micro-EDMand the optimization method used. Belloti, Qian, & Reynaerts, 2018 Enhancement of the micro-EDM process for drilling through-holes…”

Section: Search Resultsmentioning

confidence: 99%

Section: Grey Relational Analysis-taguchi Methodsmentioning

confidence: 99%

Optimization of Micro-Electrical Discharge Machining Parameters of Ti6AL4V Component: A Mapping Study

Apostolopoulou¹,

Al-Juboori²

2019

JMR

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“…The amount of energy per discharge is reduced during finishing (average discharge energy: 3.8 µJ). The average energy per discharge is computed from samples of the voltage and current signals including roughly 2000 pulses following the same methodologies we applied in a previous study [ 35 ].…”

Section: Methodsmentioning

confidence: 99%

Shaping Soft Robotic Microactuators by Wire Electrical Discharge Grinding

et al. 2020

Self Cite

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Inflatable soft microactuators typically consist of an elastic material with an internal void that can be inflated to generate a deformation. A crucial feature of these actuators is the shape of ther inflatable void as it determines the bending motion. Due to fabrication limitations, low complex void geometries are the de facto standard, severely restricting attainable motions. This paper introduces wire electrical discharge grinding (WEDG) for shaping the inflatable void, increasing their complexity. This approach enables the creation of new deformation patterns and functionalities. The WEDG process is used to create various moulds to cast rubber microactuators. These microactuators are fabricated through a bonding-free micromoulding process, which is highly sensitive to the accuracy of the mould. The mould cavity (outside of the actuator) is defined by micromilling, whereas the mould insert (inner cavity of the actuator) is defined by WEDG. The deformation patterns are evaluated with a multi-segment linear bending model. The produced microactuators are also characterised and compared with respect to the morphology of the inner cavity. All microactuators have a cylindrical shape with a length of 8 mm and a diameter of 0.8 mm. Actuation tests at a maximum pressure of 50 kPa indicate that complex deformation patterns such as curling, differential bending or multi-points bending can be achieved.

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“…Bellotti et al investigated the micro-EDM process for drilling small through-holes on Ti-6Al-4V while using brass tubular electrodes. Taguchi L 32 orthogonal array design and Gray relational analysis were proposed to select and optimize the process parameters that compromise between machining efficiency and surface finish [ 16 ]. Kliuev et al analytically investigated the influence of drilling conditions to the pressure drop and dielectric flow during EDM drilling through computational fluid dynamics (CFD) simulations.…”

Section: Introductionmentioning

confidence: 99%

A Simulation Study of Debris Removal Process in Ultrasonic Vibration Assisted Electrical Discharge Machining (EDM) of Deep Holes †

Chang

Zhang

et al. 2018

Micromachines

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When machining a small hole with high aspect ratio in EDM, it is hard for the flushing liquid entering the bottom gap and the debris could hardly be removed, which results in the accumulation of debris and affects the machining efficiency and machining accuracy. The assisted ultrasonic vibration can improve the removal of debris in the gap. Based on dynamics simulation software, Fluent, a three-dimensional (3D) model of debris movement in the gap flow field of EDM small hole machining assisted with side flushing and ultrasonic vibration is established in this paper. The laws of different amplitudes and frequencies and different aspect ratios on debris distribution and movement are quantitatively analyzed. The motion height of debris was observed under different conditions. The research results show that periodic ultrasonic vibration can promote the movement of debris, which is beneficial to the removal of debris in the machining gap. When compared to traditional small hole machining in EDM, the debris in the machining gap were greatly reduced, which ensures the stability of the machining process and improves the machining efficiency.

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Enhancement of the Micro-EDM Process for Drilling Through-holes

Cited by 26 publications

References 14 publications

Optimization of Micro-Electrical Discharge Machining Parameters of Ti6AL4V Component: A Mapping Study

Optimization of Micro-Electrical Discharge Machining Parameters of Ti6AL4V Component: A Mapping Study

Shaping Soft Robotic Microactuators by Wire Electrical Discharge Grinding

A Simulation Study of Debris Removal Process in Ultrasonic Vibration Assisted Electrical Discharge Machining (EDM) of Deep Holes †

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