A new method for monitoring micro-electric discharge machining processes

Mahardika, Muslim; Mitsui, Kimiyuki

doi:10.1016/j.ijmachtools.2007.08.023

Cited by 51 publications

(32 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 2 shows that in addition to the types of electrodes used, the current discharge rate affects the roughness of the workpiece. The higher the current discharge rate is, the higher the discharge energy is released [7]. Thus, the beam of electrons will hit the workpiece harder so that the value of its surface roughness is higher.…”

Section: Findings and Discussionmentioning

confidence: 99%

Factors Affecting the Surface Roughness in Sinking EDM Process

Fikri

Romlie

Aminnudin

2017

JMEST

View full text Add to dashboard Cite

The purpose of this study is to gain insights into the surface quality (smoothness) of sinking EDM machining products. Among other non-conventional machining processes, Electrical Discharge Machining (EDM) is the most commonly used process. EDM is a machining process that uses electric sparks created between a workpiece and a tool (electrode). As a manufacturing process, EDM is used for workpieces which have intricate contours and precise dimensions, and works by using electric discharges (sparks) applied in a rapid series of repetitive electrical discharges between the two electrodes, separated by a dielectric fluid, and subject to an electric voltage. Since the tool tends to wear easily and the mould material is very hard and tough, it is necessary to keep within appropriate EDM machining parameters, so that the smoothness of the mould lives up to expectations. Therefore, the parameters of sinking EDM process should be well established to produce the expected results, i.e. the smoothest surface quality and the maximum removal rate. Regarding the electrode materials used, conducting a further experiment is required to achieve the appropriate settings of pulse current, on-time, off-time, servo voltage, and gap width. This experimental study involved several factors: (a) electrode material, (b) magnitude of current, (c) on-time, and (d) quality of surface (smoothness). In this study, the gap between the electrode and the workpiece was controlled at a distance of 40 μm, and with an off-time of 5 seconds, the same dielectric fluid, the same flow speed and the same dielectric immersion, and using the workpiece (AISI P20M steel). Quantitative approaches (t test, one-way, and ANOVA) were applied to analyse the results of comparison test and to determine the best parameter in sinking EDM process.

show abstract

Section: Findings and Discussionmentioning

confidence: 99%

Factors Affecting the Surface Roughness in Sinking EDM Process

Fikri

Romlie

Aminnudin

2017

JMEST

View full text Add to dashboard Cite

show abstract

“…Development of flushing methods has been the focus of research in the last decade to enhance the debris removal from the sparking gap [7,8]. The study on the effect of highfrequency vibration of the tool electrode on EDM has been undertaken since the mid 80s, and some promising results have been acquired [1,6,[9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Previous researches in micro-EDM assisted low-frequency vibration of tool electrode by using small PZT (Piezoelectric Transducer) has proven to effectively remove debris and inhibit adhesion between electrodes and gave remarkable reduction of machining time [7,8]. Since the energy per discharge pulse in micro-EDM process is much smaller than in EDM process, the low-frequency vibration can effectively increase the material removal rate [7,8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of low-frequency vibration on workpiece in EDM processes

et al. 2011

Self Cite

View full text Add to dashboard Cite

High-frequency vibration aided EDM has become one of the ways to increase material removal rate in EDM process, due to the flushing effect caused by vibration. However, utilizing high-frequency vibration, especially in ultrasonic range consumes a lot of setup cost. This work presents an attempt to use a low-frequency vibration on workpiece of stainless steel (SS 304) during EDM process. The workpiece was vibrated with variations of low-frequency and low-amplitude. The results show that the application of low-frequency vibration in EDM process can be used to increase the material removal rate, and decrease the surface roughness and tool wear rate.

show abstract

“…The need to improve the efficiency in µ-EDM has creating an interesting studies to monitor µ-EDM process [2] and some researches has been conducted to determine the factors that effect in improving material removal rate by adding powder to the dielectric fluid in EDM processes [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of micro MoS<sub>2</sub> powder mixed dielectric fluid on surface quality and material removal rate in micro-EDM processes

Prihandana

Mahardika

Hamdi

et al. 2009

Trans. Mat. Res. Soc. Japan

Self Cite

View full text Add to dashboard Cite

Efficiency is currently becomes the main problem in µ-EDM processes. To have high efficiency in µ-EDM processes means that the workpiece machined is not only having good surface quality but also need to have high material removal rate during the machining process. In order to increase the efficiency in µ-EDM processes, micro MoS 2 powder mixed dielectric fluid is proposed as one of the solution. This study investigated the effect of micro MoS 2 powder mixed dielectric fluid with focusing on obtaining good surface quality and higher material removal rate. It was observed that by suspending micro MoS 2 powder can produce better surface quality by removing black spot in the center of surface machined. The better in surface quality also followed by increasing in material removal rate up to 70 % in certain of combination of tool electrode and workpiece material.

show abstract

A new method for monitoring micro-electric discharge machining processes

Cited by 51 publications

References 5 publications

Factors Affecting the Surface Roughness in Sinking EDM Process

Factors Affecting the Surface Roughness in Sinking EDM Process

Effect of low-frequency vibration on workpiece in EDM processes

Effect of micro MoS<sub>2</sub> powder mixed dielectric fluid on surface quality and material removal rate in micro-EDM processes

Contact Info

Product

Resources

About