Article
Automation & Control Systems
Han Wang, Yang Li, Xiang Chen, Yuchao Jia, Guanxin Chi, Yukui Wang, Zhenlong Wang
Summary: An integrated method of micro-milling and micro electrical discharge machining is proposed for manufacturing micro-structures array, ensuring high accuracy and consistency. This method improves the machining performance of the array micro-structures and shows good prospects in micro-fabrication through in-situ machining, parameter study, and workpiece lifting control.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Automation & Control Systems
Huan Liu, Jicheng Bai, Bo Zhang, Yan Cao, Shaojie Hou, Zimu Zhou
Summary: The micro-hole array machined by micro-EDM has been widely used in various industrial fields, but the accuracy of electrode breakthrough detection and servo tracking performance are often poor, negatively impacting efficiency and quality. A three-dimensional flow field model was developed to analyze gap flow before and after electrode breakthrough, proposing an online detection scheme and segmented servo strategy to improve machining efficiency and quality. Experiment results showed a 36% reduction in machining time for micro-hole array and ensured machining quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Sirui Gong, Han Wang, Chuan Tian, Zhenlong Wang, Yukui Wang
Summary: This paper introduces a new method to prevent the fracture of monocrystalline silicon during EDM by controlling the topography of single discharge crater. It is found that by controlling the morphology of single discharge crater, less fracture can be guaranteed during the manufacturing process. This method involves narrow pulse width discharge and focused experimental tests on Cartesian surface of monocrystalline silicon with different machining parameters to achieve a controlled fracture in the complex 3D structure.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
M. S. I. Chowdhury, B. Bose, S. Rawal, G. S. Fox-Rabinovich, S. C. Veldhuis
Summary: The study investigates the effect of AlTiN and CrN PVD coatings on tool wear during the machining of a Ti6Al4V alloy with severe BUE formation. It demonstrates that CrN coating possesses unique micromechanical properties and tribological adaptive characteristics, minimizing BUE formation and significantly improving tool performance.
Article
Physics, Multidisciplinary
Suresh Pratap, Somak Datta
Summary: This study investigated the impact of reverse micro-EDM on the geometrical characteristics of circular cross-section array microelectrodes. The results showed that increasing the capacitance, voltage, and feed parameters decreased the diameter by 6.75% and increased the taper of the electrodes by 3%. Grey relational analysis optimization found that a capacitance of 10 nF, voltage of 130 V, and feed rate of 0.3 mm/min achieved the minimum deviation in the geometrical characteristics of WC array microelectrodes.
Article
Biophysics
Nikita Thomas, Vikram Singh, Nafisa Ahmed, Dao Trinh, Sabine Kuss
Summary: Micro-optical-ring electrodes (MOREs) are micro-scale ring-electrodes with an optical fiber core, enabling optical signal conductivity during electrochemistry. In this study, MOREs were characterized and optimized for spectro-electrochemical detection, as well as demonstrated their applicability to electrochemical single live cell imaging.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Engineering, Manufacturing
Zhen Yin, Peng Zhang, Peixiang Zhou, Kun Zhang, Qixuan Sun, Qinjian Zhan, Hua Li
Summary: This study proposes a new EDM method using longitudinal-torsional ultrasonic vibration (LTV) electrodes for micro-hole machining to enhance the micro-hole machining performance. A 38.9 kHz ultrasonic vibration transducer is developed for LTV electrodes, and the effect of ultrasonic amplitude on flow rate and debris removal efficiency is discussed. The study finds that applying appropriate ultrasonic amplitude to the electrode effectively reduces the electrode wear and micro-hole taper, and increases the material removal rate.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Automation & Control Systems
Kashif Ishfaq, Muhammad Asad Maqsood, Muhammad Arif Mahmood
Summary: Electric discharge machining (EDM) has been widely accepted in various application sectors for the fabrication of micro-size products. However, limited work has been reported on EDM of SS 316 for micro-impression fabrication. In this research, the influence of different dielectrics, powders, and electrodes on the fabrication of micro-impressions in AISI 316 using EDM was comprehensively examined. The results showed improved material removal and tool wear rates when using silicon carbide mixed kerosene dielectric against silicon carbide aluminum tool at a pulse time ratio of 1.5. Additionally, a reduction in dimensional overcut was observed when employing the proposed EDM setup for cutting AISI 316.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Sucharita Saha, Amit Kumar Ball, Arpita Mukherjee, Arjita Das, Saurav Halder, Naga Hanumaiah
Summary: The application of Micro-Nano scale Electrical Discharge Machining is rapidly growing in manufacturing metal products with small geometric features. Fabricating tiny electrodes smaller than 10 μm using electrochemical etching process has been investigated, with the smallest electrode fabricated at 3.33 μm. Systematic study on the performance of these electrodes in micro-EDM is essential for batch production of micro parts.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2021)
Article
Automation & Control Systems
Liya Jin, Yadong Gong, Yao Sun, Quan Wen, Jingyu Sun
Summary: A novel micro-milling cutter for machining micro-groove array was manufactured using the LS-WEDT process technology. The surface of the micro-groove array machined by the novel cutter has high surface uniformity and low surface roughness.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Polymer Science
Shaofei Jiang, Yuansong Zhang, Haowei Ma, Xiaoqiang Zha, Xiang Peng, Jiquan Li, Chunfu Lu
Summary: This study experimentally investigated the replication uniformity of microstructures and found that the cavity thickness and process parameters have significant influence on the uniformity. The experimental results provide important data on how to improve the replication uniformity of parts with microstructure arrays.
Article
Instruments & Instrumentation
Xu Yang, Chao Geng, Xiaoyang Li, Feng Li, Jing Zuo, Jiali Jiang, Bincheng Li, Xinyang Li
Summary: The article presents a micro lens array scanner (MLAS) based on multiple micro lens arrays which can be used for large-aperture infrared beam scanning. The performance of MLAS with different structures was analyzed through mathematical models, providing guidance for the design of infrared optical systems and practical applications of MLAS.
INFRARED PHYSICS & TECHNOLOGY
(2021)
Article
Automation & Control Systems
Shaojie Hou, Jicheng Bai
Summary: By using a 2D geometric simulation model and conducting micro-drilling experiments, the wear and shape change of the electrode during micro-EDM drilling have been successfully predicted. A compensation strategy based on discharge sensing and the developed model has been proposed, which improves the machining accuracy of micro-hole arrays.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Instruments & Instrumentation
Tianze Zhao, Rui Shi, Zhuo Li, Yanze Gao, Sichen Zhang
Summary: In this study, two infrared scene projection optical systems (IRSPOS) operating in cryogenic environment were designed for middle-wave and long-wave infrared, respectively. The thermal deformation of the IRSPOS structures was analyzed and optimized to ensure temperature adaptability. Experimental results show that the LW-IRSPOS has a modulation transfer function (MTF) higher than 0.21 at a spatial frequency of 13.5 lp/mm in cryogenic environment. This LW-IRSPOS has been successfully used in ground experiments of a space infrared detection system.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Shun-Tong Chen, Li-Wen Huang
Summary: In this study, a micro-energy w-EDM power source with dual-capacitance is designed for precise cutting of boron-doped nano-polycrystalline diamond material to improve machining efficiency and reduce thermal damage. Utilizing a high-frequency switching dual-capacitance circuit allows for rapid removal of micro-quantities of diamond with a uniform plasma pulse output.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Bolin Ji, Hao Tong, Junjie Li, Yong Li, Mengyao Xu
CERAMICS INTERNATIONAL
(2020)
Article
Engineering, Mechanical
Muchen Xu, Blaine Arihara, Hao Tong, Ning Yu, Yuta Ujiie, Chang-Jin Kim
EXPERIMENTS IN FLUIDS
(2020)
Article
Engineering, Electrical & Electronic
Junjie Li, Hao Tong, Yubin Pu, Yong Li, Seonghee Namb
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Engineering, Electrical & Electronic
Bolin Ji, Hao Tong, Xiaofan Han, Yong Li, Yubin Pu
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Automation & Control Systems
Guodong Liu, Hao Tong, Yong Li, Hao Zhong, Qifeng Tan
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2020)
Article
Engineering, Electrical & Electronic
Hao Zhong, Weifeng Huang, Yong Li, Hao Tong, Guodong Liu, Zhiqiang Wang
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Automation & Control Systems
Guodong Liu, Hao Tong, Yong Li, Hao Zhong, Qifeng Tan
Summary: This research focuses on profile shaping and surface finishing of microstructures using micro electrochemical machining (ECM) on mold steel S136H. By adjusting machining voltage and scanning velocity, different machining effects can be achieved for rapid machining of basic profiles and surface finishing. The ECM process is proven to achieve high precision machining of microstructures with curve profiles on the mold steel.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Ran Quan, Hao Tong, Yong Li
Summary: Nano EDM has the potential for achieving nanoscale removal resolution in metal and alloy materials. By designing a novel pulsed power supply, it is possible to output pulses with 5ns pulsewidth or up to 9 MHz, demonstrating the feasibility of machining nanostructures in nano EDM experiments.
Article
Chemistry, Multidisciplinary
Guodong Liu, Hao Tong, Haoyang Shi, Yong Li, Junjie Li
Summary: The study proposes a novel tool electrode with hydrophobic features on the sidewall surface, utilizing spherical array cavities to enhance the gas-shielding effect of the gas film during electrolysis, thereby suppressing stray corrosion and improving machining accuracy in micro-ECM.
Article
Engineering, Manufacturing
Yuge Luo, Hao Tong, Guodong Liu, Tianyi Wu, Yong Li
Summary: In this study, a scanning process of ultrasonic vibration-assisted SACE (UV-SACE) is proposed for high-efficiency processing on quartz glass without surface microcracks. By considering the coupling effect of feed rate and vibration amplitude, the optimal input conditions were obtained. Additionally, the removal mechanism of UV-SACE scanning process on quartz was analyzed and applied to improve material removal rate and processing accuracy.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Article
Engineering, Multidisciplinary
Guodong Liu, Hao Tong, Yong Li, Hao Zhong
Summary: Using sidewall-insulated hollow electrodes in micro electrochemical machining is effective for electrolyte-refresh and stray corrosion inhibition. The novel SIHE structure offers a simpler and more reliable fabrication method, and it can inspire new electrode preparation schemes based on new substrate materials and film preparation approaches.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Xueyuan Bai, Hao Tong, Chenzi Wang, Yong Li, Qifeng Tan, Zixing Ye, Lujun Pan, Yongpeng Zhao
Summary: This study proposes the fabrication of micro/nanorobots made of helical carbon nanowires using a low-cost batch fabrication technique controlled by a magnetic field. The research investigates the motion of these helical carbon nanowire robots (HCNRs) immersed in a low-Reynolds-number liquid. The results show that HCNRs have good mobility and can be used for capturing and transporting small particles, presenting a new method for nanoparticle transport using helical micro/nanorobots.
ACS APPLIED NANO MATERIALS
(2022)
Article
Automation & Control Systems
Guodong Liu, Hao Tong, Tianyi Wu, Yong Li, Yuge Luo
Summary: In this research, an in-situ observation-based discharge analysis was conducted using high-speed image technology to characterize spark discharges during the electrochemical discharge machining (ECDM) process. The spark discharge behavior was divided into three stages: bubble generation, gas film formation, and spark discharge occurring. The effects of applied voltage and inter-electrode gap on the gas-film dimension, discharge intensity, discharge location, and discharge uniformity were analyzed by studying the images of the gas film and sparks. The discovery of chain discharges caused by the expansion and morphology of the gas film provides new insights into understanding the mechanism and analyzing the processing results of ECDM.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Electrochemistry
Guodong Liu, Hao Tong, Yong Li, Hao Zhong
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Engineering, Manufacturing
Hao Zhong, Hao Tong, Zhiqiang Wang, Yong Li, Yubin Pu
JOURNAL OF MICRO AND NANO-MANUFACTURING
(2020)