A Study on Micro-tool and Micro-feature Fabrication in Micro-EDM

2019 ◽  
pp. 191-202
Author(s):  
Biswesh Ranjan Acharya ◽  
Abhijeet Sethi ◽  
Akhil Dindigala ◽  
Partha Saha ◽  
Dilip Kumar Pratihar
Keyword(s):  
Micro Edm ◽  
Micro Tool

Fabrication of a micro-tool in micro-EDM combined with co-deposited Ni–SiC composites for micro-hole machining

2007 ◽  
Vol 17 (4) ◽  
pp. 763-774 ◽  
Author(s):  
Jung-Chou Hung ◽  
Wei-Chieh Wu ◽  
Biing-Hwa Yan ◽  
Fuang-Yuan Huang ◽  
Kun-Ling Wu
Keyword(s):  
Micro Edm ◽  
Micro Hole ◽  
Micro Tool ◽  
Sic Composites ◽  
Hole Machining

Development of a Reverse Micro EDM-Drilling for Holing Diamond-Tool

2010 ◽  
Vol 126-128 ◽  
pp. 802-807
Author(s):  
Shun Tong Chen ◽  
Zong Han Jiang ◽  
Yi Ying Wu ◽  
Hong Ye Yang
Keyword(s):  
Diamond Tool ◽  
Dimensional Accuracy ◽  
Sintered Alloy ◽  
Micro Edm ◽  
Hollow Shaft ◽  
Discharge Capacitance ◽  
Micro Holes ◽  
Micro Hole ◽  
Micro Tool ◽  
Edm Drilling

This study presents the development of a drilling technique for an innovative tabletop drilling machine that combines micro-EDM with drilling to fabricate micro-holes in diamond-tool. The mechanisms designs of double V-shaped bearings and double spindles which provide a precision clamping and vertical alignment for diamond-tool and micro-tube are devised to enable to machine a co-centric micro-hole for micro-tool. A diamond-tool, made with copper-based sintered alloy, is drilled by using the developed technique of co-centric micro-hole EDM-drilling into a hollow shaft which can create equilibrium of drilling forces, prevent a drilling squeezing to be occurred and enable to offer a temporary storing space for drilling chips. Relative experiments including the determinations of drilling ratio and discharge capacitance are carried out via this established machine. Experimental results show that excellent geometric and dimensional accuracy of micro-holes on the diamond-tool can be achieved.

scholarly journals Desktop Micro-EDM System for High-Aspect Ratio Micro-Hole Drilling in Tungsten Cemented Carbide by Cut-Side Micro-Tool

Micromachines ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 675 ◽  
Author(s):  
Yung-Yi Wu ◽  
Tzu-Wei Huang ◽  
Dong-Yea Sheu
Keyword(s):  
Aspect Ratio ◽  
Large Scale ◽  
Cemented Carbide ◽  
Hole Drilling ◽  
Scale Production ◽  
Micro Edm ◽  
Micro Holes ◽  
Micro Hole ◽  
Micro Tool ◽  
Micro Tools

Tungsten cemented carbide (WC-Co) is a widely applied material in micro-hole drilling, such as in suction nozzles, injection nozzles, and wire drawing dies, owing to its high wear resistance and hardness. Since the development of wire-electro-discharge grinding (WEDG) technology, the micro-electrical discharge machining (micro-EDM) has been excellent in the process of fabricating micro-holes in WC-Co material. Even though high-quality micro-holes can be drilled by micro-EDM, it is still limited in large-scale production, due to the electrode tool wear caused during the process. In addition, the high cost of precision micro-EDM is also a limitation for WC-Co micro-hole drilling. This study aimed to develop a low-cost desktop micro-EDM system for fabricating micro-holes in tungsten cemented carbide materials. Taking advantage of commercial micro tools in a desktop micro-EDM system, it is possible to reach half the amount of large-scale production of micro-holes. Meanwhile, it is difficult to drill the deep and high aspect ratio micro-holes using conventional micro-EDM, therefore, a cut-side micro-tool shaped for micro-EDM system drilling was exploited in this study. The results show that micro-holes with a diameter of 0.07 mm and thickness of 1.0 mm could be drilled completely by cut-side micro-tools. The roundness of the holes were approximately 0.001 mm and the aspect ratio was close to 15.

Using a helical micro-tool in micro-EDM combined with ultrasonic vibration for micro-hole machining

2006 ◽  
Vol 16 (12) ◽  
pp. 2705-2713 ◽  
Author(s):  
Jung-Chou Hung ◽  
Jui-Kuan Lin ◽  
Biing-Hwa Yan ◽  
Hung-Sung Liu ◽  
Ping-Hsing Ho
Keyword(s):  
Ultrasonic Vibration ◽  
Micro Edm ◽  
Micro Hole ◽  
Micro Tool ◽  
Hole Machining

Development and Application of a Micro-Honing-Tool

2009 ◽  
Vol 76-78 ◽  
pp. 189-194
Author(s):  
Shun Tong Chen ◽  
Ming Chie Yeh
Keyword(s):  
Surface Roughness ◽  
Hole Drilling ◽  
Micro Edm ◽  
Wire Edm ◽  
Uneven Surface ◽  
Novel Technique ◽  
New Process ◽  
Micro Hole ◽  
Micro Tool ◽  
On Line

The major aim of this study is to present a novel technique for honing the micro-hole. It is difficult that regarding the finish machining of the micro-hole that the diameter is less than 300 m. First, a new process that to on-line accurately fabricate the micro-honing-tool using micro-EDM, micro-co-deposition and micro-wire-EDM is proposed for honing the micro-hole. A micro rod for as the substrate of the micro-tool is formed by wire-EDM and then co-deposited with 0-2 m CBN-abrasives. Subsequently, it is axially and crisscross cut for an appropriate length by micro-wire-EDM to make the crotched microstructure. The whole processes are able to be on-line realized since all working positions are recorded in detail and fabrication technologies are offered sufficiently on the same system. As a result, per the same fabrication-system, the micro-honing process is also on-line conducted. The finished micro-honing-tool is employed directly without unloaded and reloaded. The grinding-block can compactly stick on the wall surface of the micro-hole due to the radial elasticity of the micro-tool and then fast grind away the uneven surface by removal of micro amount. Experimental results demonstrated that the circularity and surface roughness on the hole-wall is evidently improved. Comparing with the obtained machining surface by micro-EDM hole-drilling, the original surface roughness of near one-sixth time can be achieved. It is indicated that the micro-hole can be honed accurately using the proposed technique.

The Application of Powder Suspended Dielectric Fluid in Micro-EDM Processes to Reduce Machining Time

2009 ◽  
Vol 1 (3) ◽  
pp. 210-213 ◽  
Author(s):  
Gunawan Prihandana ◽  
Muslim Mahardika ◽  
M. Hamdi ◽  
Kimiyuki Mitsui
Keyword(s):  
Dielectric Fluid ◽  
Micro Edm ◽  
Machining Time

Recent Patents on Micro-EDM Milling

2020 ◽  
Vol 13 (3) ◽  
pp. 219-229
Author(s):  
Baocheng Xie ◽  
Jianguo Liu ◽  
Yongqiu Chen
Keyword(s):  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Three Dimensional ◽  
Processing Method ◽  
Electrode Wear ◽  
Micro Edm ◽  
Processing Efficiency ◽  
Processing Methods ◽  
Machining Quality ◽  
Micro Electrical Discharge Machining

Background: Micro-Electrical Discharge Machining (EDM) milling is widely used in the processing of complex cavities and micro-three-dimensional structures, which is a more effective processing method for micro-precision parts. Thus, more attention has been paid on the micro-EDM milling. Objective : To meet the increasing requirement of machining quality and machining efficiency of micro- EDM milling, the processing devices and processing methods of micro-EDM milling are being improved continuously. Methods: This paper reviews various current representative patents related to the processing devices and processing methods of micro-EDM milling. Results: Through summarizing a large number of patents about processing devices and processing methods of micro-EDM milling, the main problems of current development, such as the strategy of electrode wear compensation and the development trends of processing devices and processing methods of micro-EDM milling are discussed. Conclusion: The optimization of processing devices and processing methods of micro-EDM milling are conducive to solving the problems of processing efficiency and quality. More relevant patents will be invented in the future.

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