Prediction of aspect ratio of a micro hole drilled by EDM

Li, Jianzhong; Yin, Guoqiang; Guo, Xuejie; Yu, Zuyuan

doi:10.1007/s12206-012-1214-9

Cited by 28 publications

(8 citation statements)

References 10 publications

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“…They fabricated through microholes on WC of Grade MG18 by µ-SEM using a pure tungsten electrode of 200 µm diameter. A group of researchers conducted a total of sixty experiments with different drilling parametric combinations to validate the proposed model to understand the effect of the high-aspect-ratio microholes fabricated on stainless steel 304 sheets by horizontal and vertical µ-SEM using different diameters of tungsten electrodes [27]. They reported that (i) the experimental results are close to the theoretical model values; (ii) the differences between the theoretical and the real values due to debris, temperature, and electrode rotation in the discharge gap.…”

Section: Review Of Previous Research Work On Drilling Deep Fine Holes...mentioning

confidence: 99%

Developing Meso and Microholes by Spark-Erosion Based Drilling Processes: A Critical Review

Chaubey

Gupta

2022

Micromachines

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The increased demand for miniature components has drawn the attention of researchers, engineers, and industry users to manufacture precision micro and mesoholes on foils, sheets, and plates made from a variety of engineering materials. These days, micro-drilling is extensively being adopted as a fundamental operation in all kinds of smart manufacturing industries to make different types of microholes, such as through holes, blind holes, and taper holes on micro-parts and components. Drilled holes with a diameter of less than 1 mm are referred to as microholes, while drilled holes whose diameter ranges between 1 and 10 mm are known as mesoholes. Meso and microholes are commonly referred to as fine-holes. Modern or advanced drilling processes are mostly used to drill microholes from a variety of materials. This paper presents an extensive review of the previous research conducted on the drilling of fine holes (meso and micro size) by spark- erosion-based processes along with highlighting work and tool electrode materials, specifications of drilled holes, types of microholes (through or blind holes), process parameters, performance measures, and key findings. The paper aims to facilitate researchers and scholars by highlighting the capabilities of spark erosion machining, drilling, and its variants to fabricate miniature holes. The paper ends with a conclusion and future research directions to encourage further work in this area.

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Section: Review Of Previous Research Work On Drilling Deep Fine Holes...mentioning

confidence: 99%

Developing Meso and Microholes by Spark-Erosion Based Drilling Processes: A Critical Review

Chaubey

Gupta

2022

Micromachines

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“…This special feature makes this method be one of the most preferred non-traditional [235] reported the smallest achieved diameter to be 0.5 µm using a silicon electrodes. [4,5] micro holes achieved by EDM is presented in Fig. 24 (a) and (d).…”

Section: Edm Micro Drillingmentioning

confidence: 99%

“…Typical examples include inkjet printer nozzles; wire drawing dies; spinneret holes for synthetic fibres; cooling holes in plane turbine blades; fuel injection nozzles in automotive industries; dental, surgical implants and drug delivery orifices in medical purposes; cutting-tool cooling channels; and micro-hole drilling of hard, brittle and difficult-to-cut materials. [4,[236][237][238][239][240][241][242].…”

Section: Edm Micro Drillingmentioning

confidence: 99%

A review of modern advancements in micro drilling techniques

Hasan

Zhao

Jiang

2017

Journal of Manufacturing Processes

161

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The demand for micro drilling with a diameter in a range of a few microns to several hundred microns is increasing in industries such as electronics, aerospace, medicine and automobiles, due to a significant uptake in the use of miniaturised products and devices. In order to satisfy the demand, a number of different micro drilling techniques have been developed. There has been, however, no report which explains, compares and contrasts all of these micro drilling techniques. This study examines the lasts micro drilling methods and techniques, categorises them into different groups, highlights recent developments and new trends, and depicts the future requirements in the field of micro drilling. Both conventional and non-conventional micro drilling techniques used in modern age applications are categorized. Conventional micro drilling makes use of drill bits of different configurations such as twist, spade, D-shaped, single flute, compound drill and coated micro drill, while non-conventional micro drilling involves electrical, chemical, mechanical and thermal means which include laser, EDM, ECM, SACE, electron beam, ultrasonic vibration or combinations of these approaches. We present here, a comparative study of conventional and non-conventional micro drilling techniques in order to show the potential and versatility of various micro drilling methods.

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“…Disadvantages of spark erosion machining include electrode wear, deformed shape of the obtained hole (conical shape), and heat-affected top layer of the workpiece surface [6][7][8][9]. In some cases, additional finishing operations are also required [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental research on electrodischarge drilling of high aspect ratio holes in ti-6al-4v alloy

2018

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The drilling of small cylindrical (D < 1 mm) holes with a high ratio of length to diameter (L/D > 10) in difficult-to-cut materials is significantly beyond mechanical drilling capabilities. Electrodischarge machining (EDM) is a good and cost effective alternative in such situations. The machinability of electrodischarge machined material is determined by its thermal and electrical properties; therefore, the high electrical resistivity, the relatively high melting point and low thermal conductivity of Ti-6Al-4V alloy cause problems during the machining of parts made of this material. In this article, the results of experimental research on electrodischarge microdrilling in Grade 5 Ti-6Al-4V alloy are presented. The influence of various machining parameters (pulse time, discharge voltage, current amplitude, dielectric pressure, electrode-tool rotation speed) on key technological factors such as hole depth, side gap, linear tool wear, mean drilling speed and hole taper angle was analysed.

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Prediction of aspect ratio of a micro hole drilled by EDM

Cited by 28 publications

References 10 publications

Developing Meso and Microholes by Spark-Erosion Based Drilling Processes: A Critical Review

Developing Meso and Microholes by Spark-Erosion Based Drilling Processes: A Critical Review

A review of modern advancements in micro drilling techniques

Experimental research on electrodischarge drilling of high aspect ratio holes in ti-6al-4v alloy

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