New Researches for Fabrication of Micro-Pin in Micro-ECM

2012 ◽  
Vol 497 ◽  
pp. 205-209 ◽  
Author(s):  
Ming Huan Wang ◽  
Tao Wang ◽  
Wei Peng
Keyword(s):  
Low Voltage ◽  
Electrochemical Machining ◽  
Pulse Power ◽  
Duty Ratio ◽  
Theoretic Model ◽  
Micro Machining ◽  
Key Technology ◽  
Dc Power ◽  
Micro Ecm ◽  
Micro Parts

Micro-electrode preparation is the key technology in micro-machining of micro- mechanics and micro-parts. In this research, the machining method of micro-pin using micro-electrochemical machining (micro-ECM) was proposed. The principle of micro-pin fabrication is introduced and the studies are focused on the effects of varies parameters on the shape of the micro-pin. The theoretic model between the shape of micro-pin and the parameters including power, voltage, duty ratio of pulse power, immerge depth of electrode is built up and then verified by experimentations. Experimental results denote that the micro-electrode with desirable shape and size could be prepared by controlling applied parameters. When the immersing depth is deeper, the pulse power, low voltage and duty ratio is proper selected. On the contrary, the DC power or pulse power with higher voltage and duty ratio should be applied. Finally, micro-pin with diameter of 5μm and 60μm long was fabricated when the DC power of 1.8V voltage and immersing depth of 1mm is applied.

Fabrication of Micro-Structures by Micro-ECM

2009 ◽  
Vol 69-70 ◽  
pp. 229-233
Author(s):  
Ming Huan Wang ◽  
Qiao Fang Zhang ◽  
C.Y. Yao ◽  
Wei Peng
Keyword(s):  
Mathematical Model ◽  
Electrochemical Etching ◽  
Electrochemical Machining ◽  
Pulse Power ◽  
Micro Machining ◽  
Slot Milling ◽  
Micro Ecm ◽  
Micro Holes ◽  
Machining System ◽  
Micro Structures

The machining of materials on microscopic scales is considered to be great importance to a wide variety of fields. Electrochemical Micro-machining (EMM) appears to be promising to machine the micro-structures in future due to the material is dissolved at the unit of ion. This paper is focused on developing a micro electrochemical machining system in which the micro-structures such as micro-cylinder, multiple micro-electrodes, micro-holes and micro-slot were processed. The micro-electrodes were prepared in a precisely controlling the electrochemical etching process. Mathematical model controlling the diameters of electrodes was built up. Furthermore, the obtained micro-electrodes were selected as the cathode tool for micro holes drilling and micro-slot milling using pulse power in Micro-ECM.

Study on Micro Electrochemical Machining Technology and its Influencing Factors

2013 ◽  
Vol 395-396 ◽  
pp. 1062-1065 ◽  
Author(s):  
Xiao Hai Li ◽  
Li Ping Zhao ◽  
Ying Chun Shi ◽  
Li Jie Zhao
Keyword(s):  
High Frequency ◽  
Short Pulse ◽  
Influence Factors ◽  
Electrochemical Machining ◽  
Optical Encoder ◽  
Loop Control ◽  
Micro Ecm ◽  
Micro Parts ◽  
Micro Hole ◽  
Meso Scale

Electrochemical machining (ECM) is an anodic dissolution process of metal as anode ion by ion, and micro-ECM is a promising micromachining method at micro to meso-scale. Thus, a micro-ECM setup was developed to fabricate micro parts and explore the feasibility of micro-ECM at micro to meso-scale, including the design of high-frequency micro-energy pulse power supply. By using the detection unit of machining state and optical encoder, a closed loop control system for micro-ECM was developed. Under low concentration of passivating electrolyte, low machining voltage, micro rotating electrode and high-frequency short-pulse current, the machining gap can be reduced to about 10μm. The influence factors of the additives and the rotation of micro electrode on micro ECM were analysed by experiments. A micro-hole about 30μm in diameter was drilled by the rotating micro electrode.

Research on Multifunctional Micro Machining Equipment

2004 ◽  
Vol 471-472 ◽  
pp. 37-42 ◽  
Author(s):  
B.X. Jia ◽  
Zhen Long Wang ◽  
Fu Qiang Hu ◽  
Xiao Hai Li ◽  
Wan Sheng Zhao
Keyword(s):  
New Technologies ◽  
Electrochemical Machining ◽  
Micro Edm ◽  
Micro Machining ◽  
Electro Discharge Machining ◽  
Micro Ecm ◽  
Micro Holes ◽  
Micro Hole ◽  
Series Of Experiments ◽  
Frequency Pulse

To perform several micro-machining on same machine tool, a micro machining equipment was researched and developed. The equipment adopts some high and new technologies. It is equipped with high precision XYZ stage, a spindle with high rotation accuracy and variable rotation speed, a granite worktable, a block electro discharge grinding unit for machining micro rod, a ultrasonic vibration unit for workpiece vibrating, a high frequency pulse power supply for micro-ECM and a video microscopic system with high enlargement factor. The equipment can perform micro electro discharge machining (EDM), micro electrochemical machining (ECM), micro ultrasonic machining (USM) as well as their combination. It can also machine 3D microstructures. A series of experiments were carried out. Using micro-EDM, micro rods with the diameter of less than 5µm were ground on block electrode, micro holes and 3D microstructures were obtained. Shaped holes were machined by using combination of micro-EDM and micro-USM. A micro hole with the diameter of 100µm was machined via micro-ECM.

scholarly journals Micro Electrochemical Machining of Array Micro-Grooves Using In-Situ Disk Electrode Fabricated by Micro-WEDM

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 66 ◽  
Author(s):  
Yukui Wang ◽  
Han Wang ◽  
Yuxin Zhang ◽  
Xiaolong He ◽  
Zhenlong Wang ◽  
...  
Keyword(s):  
High Precision ◽  
Large Scale ◽  
Electrical Discharge Machining ◽  
Electrochemical Machining ◽  
Tool Electrode ◽  
Disk Electrode ◽  
Micro Ecm ◽  
Micro Parts ◽  
Micro Wedm

This paper develops an array micro-grooves manufacturing method using micro electrochemical machining (ECM) with disk electrode, which is prepared by in-situ micro wire electrical discharge machining (WEDM). This technology focuses on the difficulty of array structure manufacture in micro-electro-mechanical systems (MEMS). A micro-ECM system is built based on the micro-WEDM machine to achieve high precision processing of the array micro-grooves. Since micro-WEDM has good performance in high precision machining of the rotating structure, single and multi-edge disk electrodes can be fabricated in-situ using graphite. The as-prepared disk tool electrode is directly used for micro-electrochemical milling of the array micro-grooves without disassembling away from the device, which avoids the positioning error caused by the re-clamping of the disk electrode. With the advantages of high surface quality and no electrode loss, micro-ECM improves the manufacture performance of the micro-parts. Through wire path optimization, the shape accuracy of the disk edge is improved. After the research of the micro-ECM parameters, the process is improved, and finally, the high precision array micro-grooves are obtained. This method combines the advantages of micro-WEDM and disk electrode micro-ECM milling, and it is convenient for large-scale manufacture of array micro-structures on micro-parts and MEMS.

The Development of Nanosecond Pulse Power Supply of Electrochemical Micromachining

2011 ◽  
Vol 396-398 ◽  
pp. 1799-1802
Author(s):  
He Bin Wang ◽  
Zhong Ning Guo ◽  
Hong Ping Luo ◽  
Jin Fei Liang ◽  
Zi Ping Han
Keyword(s):  
Power Supply ◽  
Pulse Power ◽  
Nanosecond Pulse ◽  
Electrochemical Micromachining ◽  
Duty Ratio ◽  
Pulse Power Supply ◽  
Power Amplification ◽  
Waveform Generation ◽  
Dc Power ◽  
Circuit Power

This paper makes some research on designing and manufacturing a nanosecond pulse power supply of electrochemical micromachining, including DC power supply, waveform generation circuit, rectifier and filter circuit，power amplification and rapid protection circuit. This power supply can generate 5MHz maximum frequency and square wave of 100ns pulse width, stably. The voltage ranges from 0V to 10V, and duty ratio ranges from 0.1 to 0.5, continuously.

An integrated low-voltage rated HTS DC power system with multifunctions to suit smart grids

2015 ◽  
Vol 510 ◽  
pp. 48-53 ◽  
Author(s):  
Jian Xun Jin ◽  
Xiao Yuan Chen ◽  
Ronghai Qu ◽  
Hai Yang Fang ◽  
Ying Xin
Keyword(s):  
Power System ◽  
Smart Grids ◽  
Low Voltage ◽  
Dc Power

scholarly journals High Step-up Coupled Inductor Inverters Based on qSBIs

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3032 ◽  
Author(s):  
Hongchen Liu ◽  
Xi Su ◽  
Junxiong Wang
Keyword(s):  
Steady State ◽  
High Voltage ◽  
Low Voltage ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Passive Components ◽  
Steady State Analysis ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Working Principle

In this paper, two types of high step-up coupled inductor inverters based on qSBIs (quasi- switched boost inverters) are proposed. By applying the coupled inductor to the qSBIs, the voltage gain of the proposed inverter is regulated by turn ratio and duty ratio. Thus, a high voltage gain can be achieved without the circuits operating at the extreme duty cycle by choosing a suitable turn ratio of the coupled inductor. In addition, the proposed circuits have the characteristics of continuous input current and low voltage stress across the passive components. A boost unit can be added to the proposed inverters for further improvement of the voltage gain. In this paper, the working principle, steady state analysis, and the comparisons of the proposed inverter with other impedance-source inverters are described. A 200 W prototype was created and the experimental results confirm the correctness of the analysis in this paper.

Influence of High Duty Ratio and Frequency in WECM Employing In Situ Fabricated Wire Electrode

2017 ◽  
Vol 5 (4) ◽  
Author(s):  
S. Debnath ◽  
J. Kundu ◽  
B. Bhattacharyya
Keyword(s):  
Mathematical Modeling ◽  
Electrochemical Machining ◽  
Burr Formation ◽  
Duty Ratio ◽  
Minimum Width ◽  
Applied Frequency ◽  
Early Adoption ◽  
Novel Approach ◽  
Microfabrication Techniques

To adapt with today's rapidly changing world, fabrication of intricate microparts is becoming an urgent need. Manufacturing of these microparts with stringent requirements necessitates the early adoption of different microfabrication techniques. Wire electrochemical machining (WECM) is such a process which removes excess metal by dissolving it electrochemically. This process can easily generate features downscaled to micron ranges and offers several advantages like the requirement of very simple setup, fabrication of accurate complex microfeatures without undergoing any thermal stress, burr formation, and tool wear, which make it superior from other existing micromachining processes. However, this process is new, and little is known about its applicability and feasibility. Hence, the present work is directed towards developing suitable WECM setup to fabricate microfeatures by introducing proper means for enhancing the mass transport phenomenon. The tungsten tool wire for machining has been in situ etched to a diameter of 23.43 μm by a novel approach for retaining its regular cylindrical form and has been implemented during machining. Moreover, the influences of high duty ratio and applied frequency have been investigated on the corresponding width of the fabricated microslits and the experimental results have been represented graphically where the minimum width of the microslit is obtained as 44.85 μm. Furthermore, mathematical modeling has been developed to correlate duty ratio and applied frequency with generated slit width. Additionally, the mathematical modeling has been validated with practical results and complex stepped type microfeatures have been generated to establish process suitability.

scholarly journals Key Technology of the Electrochemical Machining Flow Field in Aero-rotor Blades Made of Inconel®718

2021 ◽  
Author(s):  
Liang HUANG ◽  
Yan CAO ◽  
Chunlei TIAN ◽  
Ruochen ZHAO ◽  
Jiang DU ◽  
...  
Keyword(s):  
Flow Field ◽  
Electrochemical Machining ◽  
Rotor Blades ◽  
Key Technology
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