Liya Jin, Yadong Gong, Xuefei Tan, Jingyu Sun, Yantong Hu
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引用次数: 0
Abstract
Fabricating ultra-large aspect ratio microcylindrical electrode array efficiently, quickly, and reliably while maintaining high quality and low cost presents a continuous challenge. In this paper, a new method is proposed to produce ultra-large aspect ratio microcylindrical electrode array by taking advantage of the peculiar phenomenon that the front end of micro-prismatic electrode array becomes rounded after being worn in electric discharge machining (EDM). Specifically, micro-hole array with rounded outlets is machined on the workpiece using worn micro-prismatic electrode array, and then the micro-prismatic electrode array is converted into micro-cylindrical electrode array by reverse EDM. First, the simulation and analysis of the electric field distribution of the micro-prismatic electrode is carried out to reveal the mechanism of morphology evolution. Then, various micro-prism electrode arrays with different cross-sectional shapes were produced using the low-speed wire EDM technique. Next, the effects of cross-sectional shape, substrate material, peak current, and pulse width on electrode wear are studied. And the process conditions for rapid wear of the electrode front section into a circle and good wear consistency of the electrode array were optimized. The mathematical model of the front-end wear of the micro-prismatic electrode is also established. Following this, the development of electrode morphology was presented, transitioning from micro-prism electrode array to micro-cylindrical electrode array. The process of substrate shape change from square to circular holes was also discussed. The dimensional consistency of the micro-circular hole array was evaluated using image processing technology. Finally, a microcylindrical electrode array, measuring approximately 230 μm in diameter and having an aspect ratio of 18.15, has been successfully prepared and evaluated. This research has the potential to overcome the technological bottleneck of achieving high precision machining of micro-cylindrical electrode array with large aspect ratios.
期刊介绍：
Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science.
The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics.
The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation.
In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.
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