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Micromachines
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Advances in Hybrid Micromanufacturing Technology
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Advances in Hybrid Micromanufacturing Technology

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D：Materials and Processing".

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 9183

Special Issue Editors

Dr. Nan Yu

E-Mail Website
Guest Editor
Institute of Materials and Processes, School of Engineering, University of Edinburgh, Edinburgh EH9 3FB, UK
Interests: digital manufacture; ultra-precision machining; plasma assisted processing; in-process metrology
Dr. Ni Chen

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: hybrid machining; micro milling; design and fabrication of diamond micro tools
Prof. Dr. Ning He

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: cutting technology; micro-milling and intelligent machining of aerospace difficult-to-machine materials
Prof. Dr. Xichun Luo

E-Mail Website
Guest Editor
Centre for Precision Manufacturing, Department of Design, Manufacturing and Engineering Management, University of Strathclyde, Glasgow G1 1XJ, UK
Interests: ultra-precision machining; hybrid micromachining; nanofabrication; digital manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The demand for miniaturized products and devices is increasing in our “smaller, lighter, faster, and cheaper” world. Micromanufacturing, as the bridge between macromanufacturing and nanomanufacturing, enables the manufacture of these devices in a volume production scale. Hybrid processes based on the simultaneous and controlled interaction of process mechanisms and/or energy sources/tools have been proven to positively affect micromanufacturing characteristics such as manufacturability, accuracy, surface integrity, and complexity. Hybrid micromanufacturing processes, including assisted hybrid processes, combined hybrid processes, and the controlled application of process mechanisms, can either shorten the existing process chains or realize extraordinary process performance, and hence become increasingly popular to achieve the “1+1=3” effect.

Recent years have seen the rapid application of hybrid manufacturing in aerospace, electronics, medical devices, and energy sectors. The development of hybrid micromanufacturing is still driven by industrial needs, along with the developments of new materials, energy sources, and digital approaches. Accordingly, this Special Issue seeks to showcase research papers, communications, and review articles that focus on novel methodological developments in hybrid micromanufacturing (i.e., mechanisms, process optimization, equipment, etc.).

We look forward to receiving your submissions!

Dr. Nan Yu
Dr. Ni Chen
Prof. Dr. Ning He
Prof. Dr. Xichun Luo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • hybrid micromanufacturing
  • assisted micromanufacturing (laser-, vibration-, media-, etc.)
  • combined micromanufacturing
  • controlled micro process mechanisms (conventionally done in separated processes)

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Published Papers (4 papers)

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Research

14 pages, 3632 KiB  
Article
Effect of Abrasive Grain Concession on Micromechanical Behavior of Lapping Sapphire by FAP
by Huimin Xu, Jianbin Wang, Yiliang Xu, Qingan Li and Benchi Jiang
Micromachines 2022, 13(8), 1322; https://doi.org/10.3390/mi13081322 - 16 Aug 2022
Cited by 1 | Viewed by 1923
Abstract
Aiming at exploring the material removal mechanism for sapphire using diamond abrasive grains at the microscopic level, this paper modeled and analyzed the microscopic yield behavior of diamond abrasive grains in the FAP grinding process of sapphire. Molecular dynamics were used to simulate [...] Read more.
Aiming at exploring the material removal mechanism for sapphire using diamond abrasive grains at the microscopic level, this paper modeled and analyzed the microscopic yield behavior of diamond abrasive grains in the FAP grinding process of sapphire. Molecular dynamics were used to simulate the effects of abrasive particle size on the cutting force, potential energy, and temperature in the Newtonian zone during micro-cutting. The effect of different abrasive particle sizes on material removal was analyzed through experiments. The simulation results show that the abrasive particle radius was 12 Å, the micro-cutting force reached more than 3500 nN, while the cutting force with an abrasive particle radius of 8 Å only reached 1000 nN. Moreover, the potential energy, cutting force, and temperature in the Newtonian zone between the sapphire crystal atoms also increased. The results showed that the material removal rate saw a nonlinear increasing trend with the increase in particle sizes, while the surface roughness showed an approximately linear increase. Both of them showed a similar trend. The experimental results lay a theoretical basis for the selection of the lapping process parameters in sapphire. Full article
(This article belongs to the Special Issue Advances in Hybrid Micromanufacturing Technology)
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12 pages, 4111 KiB  
Article
Effects of Laser Machining Aluminum Alloy in Different Media
by Xiang Li, Shan Huang, Jianping Tang, Weihao Mu, Xin Xu and Xuehui Chen
Micromachines 2022, 13(7), 1130; https://doi.org/10.3390/mi13071130 - 17 Jul 2022
Cited by 5 | Viewed by 1736
Abstract
To study the effects of aluminum alloys processed by a laser in air and water and at different water velocities, corresponding experiments were conducted and the impacting effects of different water velocities on the surface of the workpiece were simulated, respectively. The results [...] Read more.
To study the effects of aluminum alloys processed by a laser in air and water and at different water velocities, corresponding experiments were conducted and the impacting effects of different water velocities on the surface of the workpiece were simulated, respectively. The results show that when laser processing aluminum alloy materials in air, there is more slag and a recondensation layer on both sides of the groove, the heat-affected zone is larger and the surface processing quality is poor. When laser processing aluminum alloy materials in water, the processing quality is improved. With the increase in water velocity, the impacting and cooling effect is enhanced, the groove depth and groove width show a trend of first increasing and then decreasing, the slag and recondensation layer on both sides of the groove are reduced, the heat-affected zone is reduced and the processing quality of the groove is improved. When the water velocity reaches 30 m/s, a better groove can be obtained. Laser processing aluminum alloy materials in water can obtain better processing quality than laser processing in air. Full article
(This article belongs to the Special Issue Advances in Hybrid Micromanufacturing Technology)
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12 pages, 11724 KiB  
Article
An Investigation of Cutting Performance and Action Mechanism in Ultrasonic Vibration-Assisted Milling of Ti6Al4V Using a PCD Tool
by Yongsheng Su and Liang Li
Micromachines 2021, 12(11), 1319; https://doi.org/10.3390/mi12111319 - 28 Oct 2021
Cited by 9 | Viewed by 2312
Abstract
A polycrystalline diamond (PCD) tool is employed in cutting various titanium alloys because of its excellent properties. However, improving the cutting performance of titanium alloys is still a challenge. Here, an experimental investigation on the influence of ultrasonic vibration-assisted machining (UVAM) of Ti6Al4V [...] Read more.
A polycrystalline diamond (PCD) tool is employed in cutting various titanium alloys because of its excellent properties. However, improving the cutting performance of titanium alloys is still a challenge. Here, an experimental investigation on the influence of ultrasonic vibration-assisted machining (UVAM) of Ti6Al4V titanium alloy on the cutting performance and action mechanism was studied using a PCD tool. Cutting force, machined surface, surface adhesion, and wear morphology were analyzed. The results indicated that UVAM can effectively improve cutting performance. It was found that there was serious adhesion and wear of slight fragments close to the cutting edge after ultrasonic-assisted dry milling. Furthermore, the action mechanism of UVAM in improving cutting performance was discussed and analyzed from the perspective of intermittent cutting. Full article
(This article belongs to the Special Issue Advances in Hybrid Micromanufacturing Technology)
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17 pages, 6326 KiB  
Article
Experimental Research on Deep-And-Narrow Micromilled Grooves Using a Self-Fabricated PCD Micro-Cutter
by Jinjin Han, Rui Ma, Xiuqing Hao, Linglei Kong, Ni Chen, Liang Li and Ning He
Micromachines 2021, 12(10), 1170; https://doi.org/10.3390/mi12101170 - 29 Sep 2021
Cited by 2 | Viewed by 1967
Abstract
Deep-and-narrow micro-grooves are the common functional structures of miniature parts. The fabrication of the micromilled grooves with high quality and accuracy is the essential guarantee of the causative performance for these miniature parts, and micromilling is the most versatile process to machine such [...] Read more.
Deep-and-narrow micro-grooves are the common functional structures of miniature parts. The fabrication of the micromilled grooves with high quality and accuracy is the essential guarantee of the causative performance for these miniature parts, and micromilling is the most versatile process to machine such micro-grooves. However, micromilling technology is a highly tool-dependent process, and the commercial carbide micromilling cutter has shown obvious deficiencies in terms of rapid tool wear and inferior machined quality during the machining process. In this paper, a polycrystalline diamond (PCD) micromilling cutter with a large-aspect-ratio (LAR) was designed and prepared by the self-proposed hybrid fabrication method of laser and precision grinding. Micromilling experiments on oxygen-free copper were conducted, and the carbide micromilling cutter was selected in the comparative experiments. The variations of milling forces and specific energy were analyzed through the parameter experiments. Then, the surface quality, machined accuracy and tool wear were further investigated. Results showed that the PCD micromilling cutter with an aspect ratio of 3.25 was successfully manufactured by the proposed hybrid method. The self-fabricated PCD micromilling cutter presented remarkable superiority in terms of the surface quality, machined accuracy, and tool wear when preparing deep-and-narrow micro-grooves. Finally, a satisfactory micromilled groove with an aspect ratio of 2.5 was achieved with the self-fabricated LAR PCD cutter under the optimized conditions. Full article
(This article belongs to the Special Issue Advances in Hybrid Micromanufacturing Technology)
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