Next Article in Journal
Development of a Piezo-Driven Liquid Jet Dispenser with Hinge-Lever Amplification Mechanism
Next Article in Special Issue
Experimental Investigation on Ultrasonic Atomization Assisted Turning of Titanium Alloy
Previous Article in Journal
Optical Fiber Tweezers: A Versatile Tool for Optical Trapping and Manipulation
Previous Article in Special Issue
Machinability and Surface Generation of Pd40Ni10Cu30P20 Bulk Metallic Glass in Single-Point Diamond Turning
Open AccessArticle

Investigation on the Electrochemical Micromachining of Micro Through-Hole by Using Micro Helical Electrode

by Baohui Liu 1, Hang Zou 1, Haixuan Luo 1 and Xiaoming Yue 1,2,3,*
1
School of Mechanical Engineering, Shandong University, Jinan 250061, China
2
Key Laboratory of High efficiency and Clean Mechanical Manufacture, Ministry of Education, Shandong University, Jinan 250061, China
3
Suzhou Research Institute, Shandong University, Suzhou 215123, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(2), 118; https://doi.org/10.3390/mi11020118
Received: 4 December 2019 / Revised: 16 January 2020 / Accepted: 16 January 2020 / Published: 21 January 2020
(This article belongs to the Special Issue Ultra Precision Technologies for Micromachining)
The instability of machining process caused by the difficulty of the electrolyte refresh in electrochemical micromachining (EMM) of micro through-hole has been an unsolved problem. Thus, this paper investigates the electrochemical micromachining of micro through-hole by using a micro helical electrode combining with the jetting electrolyte. With the help of high-speed rotation of micro helical electrode and its spiral shape, the internal electrolyte can be stirred while the external jetting electrolyte can flow into the hole along the spiral groove to refresh the electrolyte effectively, thereby, improving the machining stability of EMM. Firstly, the influence of the process parameters on the fabrication of micro through-hole in the EMM by using micro helical electrode without non-conductive mask is investigated. Based on the optimization of the process parameters, a micro through-hole with an inlet dimension of 121.6 μm and an outlet dimension of 114.9 μm is obtained successfully. Furthermore, this paper also tries to use the micro helical electrode coated with the non-conductive mask to decrease the bad influence of the stray corrosion attack. It is found that the non-conductive mask coated on the surface of micro helical electrode can improve the machining accuracy significantly under the condition of low pulse frequency (≤1 KHz). However, its good effect on preventing the stray corrosion decreases along with the increase of the pulse frequency. View Full-Text
Keywords: electrochemical micromachining (EMM); micro through-hole; micro helical electrode; stray corrosion; non-conductive mask electrochemical micromachining (EMM); micro through-hole; micro helical electrode; stray corrosion; non-conductive mask
Show Figures

Figure 1

MDPI and ACS Style

Liu, B.; Zou, H.; Luo, H.; Yue, X. Investigation on the Electrochemical Micromachining of Micro Through-Hole by Using Micro Helical Electrode. Micromachines 2020, 11, 118.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop