Electrochemical Micro Machining of Stainless Steel in EDTA Complex Electrolyte

2013 ◽  
Vol 446-447 ◽  
pp. 214-218 ◽  
Author(s):  
Hui Chen ◽  
Lei Shi ◽  
Zhi Yong Wang ◽  
Shui Qin Yu
Keyword(s):  
Stainless Steel ◽  
Oxide Layer ◽  
Ethylenediaminetetraacetic Acid ◽  
Electrochemical Machining ◽  
Electrolyte Composition ◽  
Machining Parameters ◽  
Micro Machining ◽  
Edta Complex ◽  
Micro Holes ◽  
The Stability

Electrochemical micro machining is a critical micro machining technology. The purpose of this paper is to study the effect of ethylenediaminetetraacetic acid (EDTA) complex electrolyte in electrochemical micro machining (ECM) of stainless steel. The micro machining of stainless steel is difficult by electrochemical machining, especially in machining deep micro holes, because of an oxide layer formed on the surface. In this paper, ECM of stainless steel in EDTA complex electrolyte was researched. The influence of electrochemical machining parameters such as pulse duration, electrolyte composition to machine stainless steel was investigated. The results showed that EDTA can enhance the stability of electrochemical machining and the electrolyte is eco-friendly.

Electrochemical Micro Machining of Stainless Steel with Voltage Pulses

2009 ◽  
Vol 69-70 ◽  
pp. 219-224
Author(s):  
Hui Chen ◽  
Zhen Long Wang ◽  
Zi Long Peng ◽  
Ying Huai Dong ◽  
Wan Sheng Zhao
Keyword(s):  
Stainless Steel ◽  
Oxide Layer ◽  
Electrochemical Machining ◽  
Electrolyte Composition ◽  
Machining Parameters ◽  
Micro Machining ◽  
Short Pulses ◽  
Is Research ◽  
Micro Holes ◽  
Voltage Pulses

The purpose of this paper is to study electrochemical micro machining (ECM) technology on stainless steel. The micro machining of stainless steel is difficult by electrochemical machining, especially in machining deep micro holes, because of an oxide layer formed on the surface. To machining stainless steel, HF is usually used in electrolyte to destabilize the oxide layer. In this paper, ECM of stainless steel by applying short pulses in less toxic and corrosive electrolyte is research. The influence of electrochemical machining parameters such as voltage, current, electrolyte composition to machine stainless steel was investigated. The results showed that the oxide layer can be reduced by adding chloride and complex.

Experimental Investigation Into Sequential Micro Machining (SMM) for Micro Hole Drilling on SS–304

2019 ◽  
Vol 9 (4) ◽  
pp. 1-16
Author(s):  
Raju Mahadeorao Tayade ◽  
Biswanath Doloi ◽  
Biplab Ranjan Sarkar ◽  
Bijoy Bhattacharyya
Keyword(s):  
Xrd Analysis ◽  
304 Stainless Steel ◽  
Hole Drilling ◽  
Machining Parameters ◽  
Micro Machining ◽  
Machining Processes ◽  
Taper Angle ◽  
Micro Holes ◽  
Micro Hole ◽  
Ss 304

Sequential micro machining (SMM) is a strategy of machining applied for micro-part manufacturing. Due to the finding of new sequential machining combinations, the authors have presented a novel combination of micro-ECDM (µECDM) drilling and micro-ECM (µECM) finishing for producing micro-holes in SS-304 stainless steel. An experimental setup was developed indigenously to conduct both machining processes at one station. The sequential processes were employed with desirable machining parameters, during their individual execution. The most desirable parameter like machining voltage, for hole drilling by µECDM was decided by studying hole taper angle, radial overcut, etc. The µECDM generates a recast layer, to overcome the adverse effects of µECDM, with the µECM finishing applied subsequently. The experimental results of SMM indicate a reduction in hole taper angle, improved circularity, and better surface quality. The change of phase of material due to sequencing of µECDM and µECM processes was analyzed by an XRD analysis of SS-304.

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.

System Design and Kinematics Simulation of Electrochemical Machining Set-Up for Micro-Holes

2007 ◽  
Author(s):  
Jishun Jiang ◽  
Zhiyong Li
Keyword(s):  
Control Method ◽  
Electrochemical Machining ◽  
Machining Process ◽  
Rectilinear Motion ◽  
Micro Machining ◽  
Technical Requirements ◽  
Kinematics Simulation ◽  
Wide Range ◽  
Micro Holes ◽  
Set Up

Electrochemical micro-machining (EMM) appears to be very promising as a future micro-machining technique, since in many areas of applications, it offers many advantages, which include excellent machining precision and control, high machining rate, perfect surface quality and a wide range of materials that can be machined, regardless of their strength and toughness. At present, electrochemical micro-machining has been applied in the production of some metal workpieces, such as micro-holes, micro-slots and complex 3D surfaces. In this paper, A new electrochemical micro-machining set-up for machining metal micro-holes has been developed. Double level mechanical structure has been applied as the main structure style, which has the advantage of excellent structure rigidity, compact framework dimension as well as perfect maneuverability and maintainability. The control system based on PLC control method has also employed to realize different motion styles for rotating axis, such as uniform velocity rectilinear motion, varying velocity rectilinear motion and cycle rectilinear motion and so on. In order to verify the reliability of this EMM set-up, some test works including static measurement, assembling interferences checking and kinematics simulation have been done. The simulation results demonstrate that the developed EMM set-up for manufacturing metal micro-holes is qualified and can satisfy the technical requirements of electrochemical micro-machining process.

PULSED ELECTROCHEMICAL MICRO MACHINING OF INVAR (FE-NI) FILM USING AN ELECTRODE ARRAY

2016 ◽  
Vol 40 (5) ◽  
pp. 739-747
Author(s):  
Kwang-Ho Chun ◽  
Seung-Geon Choi ◽  
Eun-Sang Lee
Keyword(s):  
Electrochemical Machining ◽  
Electrode Array ◽  
Laser Machining ◽  
Shadow Mask ◽  
Micro Machining ◽  
Thermal Change ◽  
Surface Burning ◽  
Change Characteristics ◽  
Micro Holes ◽  
Manufacturing Methods

Recently, invar (Fe-Ni) material has been applied to OLED shadow masks due to its thermal change characteristics and thermal expansion coefficient. The most widely used manufacturing methods for invar are etching and laser machining, but they have problems like non-machined areas generated by etching and surface burning in laser machining. For this reason, an alternative machining method is necessary. In this study, pulsed electrochemical machining (PECM) has been applied to fabricate an OLED shadow mask. PECM is a highly promising technology for shadow mask manufacturing because it can produce micro-scale and complex tapered holes in one process. A pilot experiment was carried out to find a suitable electrolyte for invar film, and an array of coated Ti electrodes was used to fabricate micro holes.

Investigation on the Electrochemical Micromachining of Micro Holes with Variable Cross-Section

2014 ◽  
Vol 644-650 ◽  
pp. 4927-4931
Author(s):  
Kun Wang ◽  
Meng Gao ◽  
Qi Shen
Keyword(s):  
Cross Section ◽  
Pulse Width ◽  
Electrochemical Machining ◽  
Processing Parameters ◽  
Variable Cross Section ◽  
Electrochemical Micromachining ◽  
Variable Cross ◽  
Machining Parameters ◽  
Micro Holes ◽  
Side Gap

Based on the principle of electrochemical, the processing mechanism of electrochemical machining (ECM) micro holes is analyzed and discussed, the processing model is established and the quantitative relationship is presented between the machining side gap and the electrochemical machining parameters (pulse width and pulse period, pulse frequency, duty ratio, etc.), workpiece material parameters and the parameters of the electrolyte, the electric double layer equivalent circuit constant with mathematical expression. On the basis of the analysis of the effect of processing parameters on the electrochemical machining accuracy and stability, process out the variable cross-section micro hole at an appropriate processing parameters of variable pulse width.

Micro-Hole Machined by Electrochemical Discharge Machining (ECDM) with High Speed Rotating Cathode

2011 ◽  
Vol 295-297 ◽  
pp. 1794-1799 ◽  
Author(s):  
Shao Fu Huang ◽  
Di Zhu ◽  
Yong Bin Zeng ◽  
Wei Wang ◽  
Yong Liu
Keyword(s):  
High Speed ◽  
Electrochemical Machining ◽  
304 Stainless Steel ◽  
Machining Accuracy ◽  
Micro Machining ◽  
Rotating Speed ◽  
Electrochemical Discharge Machining ◽  
Electrochemical Discharge ◽  
Micro Holes ◽  
Micro Hole

Electrochemical discharge machining (ECDM), based on electrochemical machining (ECM) and electrodischarge machining (EDM), is an unconventional micro-machining technology. In this paper, with the use of water, the process of micro hole on ANSI 304 stainless steel machined by micro-ECDM with high speed rotating cathode is studied. The effects of machining conditions such as the cathode rotating speed and cathode diameter on the surface quality and accuracy of the shape are investigated. The results indicate that a relatively higher electrode rotating speed can improve the machining accuracy of the micro-holes and reduce the electrodes wear.

Technology of Electrochemical Micromachining Based on Surface Modification by Fiber Laser on Stainless Steel

2017 ◽  
Vol 909 ◽  
pp. 67-72
Author(s):  
Xiao Hai Li ◽  
Shu Ming Wang ◽  
Bei Bei Xue
Keyword(s):  
Stainless Steel ◽  
Surface Modification ◽  
Fiber Laser ◽  
Laser Scanning ◽  
Complex Structure ◽  
Electrochemical Machining ◽  
304 Stainless Steel ◽  
Electrochemical Micromachining ◽  
Micro Machining ◽  
Micro Cavity

In order to fabricate the micro cavity with complex structure on stainless steel, the technology of micro electrochemical machining based on surface modification by fiber laser is adopted. Heating scan on the surface of 304 stainless steel by using fiber laser can realize marking. In the process of laser heating and metal melting on the surface of 304 stainless steel, oxide layer can be formed and phase transformation can also occur, and the corrosion resistance layer with predefined pattern is formed. In the next process of micro electrochemical machining, the laser masking layer severs as the protective layer to realize micro machining of micro cavity. A newly developed device of electrochemical micro machining based on surface modification by fiber laser can meet the micro machining requirement. After laser masking processing through laser scanning on the surface of the 304 stainless steel, the passivation electrolyte and high-frequence-pulse electrochemical machining power supply were adopted, and the samples with typical structures by using electrochemical micromachining with fiber laser masking were fabricated.

Experimental Investigation for Characteristics of Localized Dissolution of Micro-Holes in Electrochemical Machining Aided by Ultrasonic Wave

2013 ◽  
Vol 567 ◽  
pp. 21-26 ◽  
Author(s):  
Zhi Yong Li ◽  
Zong Wei Niu ◽  
Li Li
Keyword(s):  
Experimental Investigation ◽  
Ultrasonic Wave ◽  
Electrochemical Machining ◽  
Wave Frequency ◽  
Micro Machining ◽  
Micro Holes ◽  
Micro Hole ◽  
Set Up

Electrochemical micro-machining (EMM) has become one of the main machining methods for production of miniaturized parts and components. Utilizing the developed EMM set-up, the effects of ultrasonic wave frequency on characteristics of localized dissolution and accuracy of micro-hole in EMM are investigated and evaluated. The experiment results demonstrate that the accuracy of micro-hole and characteristics of localized dissolution can become better with the increase of ultrasonic wave frequency. The accuracy of micro-hole machined by 26KHZ can improve about 30% than that by 16KHZ. Moreover, the ability of localized dissolution by 26KHZ can be increased about 27%-30%.

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.

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