Micro-hole fabrication by mechanical punching process

Joo, Byung-Yun; Rhim, Sung-Han; Oh, Sang-Ho

doi:10.1016/j.jmatprotec.2005.06.038

Cited by 119 publications

(54 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lu 9) demonstrated a microhole in titanium plate by using micro-ECM. Joo 10) fabricated a microhole with diameter of 25 mm together with depth of 100 mm by using micro-punches, while Liu 11) investigated the performance of the microhole drilled in high nickel alloy by using micro-EDM. Although a literature review reveals several related studies, these investigations are restricted to the drilling of microholes in a thin plate.…”

Section: Introductionmentioning

confidence: 99%

Drilling Microholes in Hot Tool Steel by Using Micro-Electro Discharge Machining

Tai

Masusawa²,

Lee

2007

Mater. Trans.

View full text Add to dashboard Cite

This study presents an investigation into the drilling of a deep microholes with the depth of 320 mm in tool steel SKD61 by the Micro-EDM process. The electrode with the diameter of 26 mm is machined by the method of wire electrodischarge grinding (WEDG). Optical microscopy, scanning electron microscopy, and confocal laser scanning microscopy techniques are used to determine the influence of the process parameters upon hole enlargement, electrode wear rate, material removal rate, wear ratio, and the observed surface topography. The results of the study reveal the optimum parameter settings for the Micro-EDM machining of a high aspect ratio microhole are as follows: (1) a pulse voltage between 60 and 100 V, (2) a capacitance between 80 pF and 220 pF. Finally when the depth exceeds 200 mm, the shape of the micro hole almost becomes tapered due to the corner wear of the electrode and the secondary discharge along the side of the hole.

show abstract

Section: Introductionmentioning

confidence: 99%

Drilling Microholes in Hot Tool Steel by Using Micro-Electro Discharge Machining

Tai

Masusawa²,

Lee

2007

Mater. Trans.

View full text Add to dashboard Cite

show abstract

“…The ability to fabricate microholes in large quantities has potential applications in micro-chip packaging, ink-jet print-head manufacture, bio-chip technologies and so on. Work in micropunching was reported by many investigators [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cobalt on Morphology of Microhole Formed by Micropunching

Guo¹,

Tam²

2017

Cobalt

View full text Add to dashboard Cite

Due to the trend of miniaturization, the speciic advantages of metal forming, especially for the high productivity and material utilization, cannot be exploited to the same extent in the ield of electronics production as in conventional metal forming. Because of the competition with less productive and environmentally more polluting technologies, micropunching is extremely suitable for mass production of micro features, and the quality of the relevant punched microholes is deinitely atracted to its successful application. Herein, the efect of cobalt on the morphology of microhole formed by punching with tungsten carbide-cobalt (WC/Co) micropunches was investigated. The results reveal that due to the optimal joint-contribution of WC and Co, the morphologies of microholes punched by 75% vol. WC+ 25% vol. Co micropunches not only satisfy with the practical requirements but also the punch using life is at the highest level among the three types of micropunches. Moreover, for 75WC/25Co micropunch, the serious wear of micropunch occurs with the wear loss of Co and WC when the punching number exceeds 1525. With the further increase in punching numbers, the dominant factors of the wear loss would mainly rely on the easily peeled of WC due to the serious loss of Co.

show abstract

“…Masuzawa and Tönshoff et al [5] used wire EDM electrode grinding technology to fabricate micro punch and micro molds, and solved the eccentric difficulties between them. Joo et al [6] developed a high-precision guiding and detecting micro-punching system, and used tungsten carbide micro punch to punch high-quality micro-holes on brass foils. Xu et al [2] fabricated micro punch of several hundred microns in diameter by means of micro-EDM grinding technology and punched out 100, 150 and 300 μm on SUS304 stainless steel sheets.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process

Liu

Shen

et al. 2015

Micromachines

View full text Add to dashboard Cite

Abstract:The aim of this paper is to fabricate micro-gears via laser shock punching with Spitlight 2000 Nd-YAG Laser, and to discuss effects of process parameters namely laser energy, soft punch properties and blank-holder on the quality of micro-gears deeply. Results show that dimensional accuracy is the best shocked at 1690 mJ. Tensile fracture instead of shear fracture is the main fracture mode under low laser energy. The soft punch might cause damage to punching quality when too high energy is employed. Appropriate thickness and hardness of soft punch is necessary. Silica gel with 200 µm in thickness is beneficial to not only homogenize energy but also propagate the shock wave. Polyurethane films need more energy than silica gel with the same thickness. In addition, blank-holders with different weight levels are used. A heavier blank-holder is more beneficial to improve the cutting quality. Furthermore, the simulation is conducted to reveal typical stages and the different deformation behavior under high and low pulse energy. The simulation results show that the fracture mode changes under lower energy.

show abstract

Micro-hole fabrication by mechanical punching process

Cited by 119 publications

References 12 publications

Drilling Microholes in Hot Tool Steel by Using Micro-Electro Discharge Machining

Drilling Microholes in Hot Tool Steel by Using Micro-Electro Discharge Machining

Effect of Cobalt on Morphology of Microhole Formed by Micropunching

Experimental and Numerical Simulation Research on Micro-Gears Fabrication by Laser Shock Punching Process

Contact Info

Product

Resources

About