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Machines
Special Issues
New Advances in Precision and Ultra-Precision Machining Technology
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New Advances in Precision and Ultra-Precision Machining Technology

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Material Processing Technology".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 1995

Special Issue Editor

Dr. Dennis Wee Keong Neo

E-Mail Website
Guest Editor
Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), Additive Technology Innovation Group, 2 Fusionopolis Way, Singapore 138634, Singapore
Interests: manufacturing process mechanics; mechanical processes; machining; design engineering; finite element analysis; mechanical engineering; finite element modeling; stress analysis; mechanical properties

Special Issue Information

Dear Colleagues,

Precision machining comprises a variety of advanced manufacturing technologies that have developed over the last few decades into flexible, fast, and reliable processes for generating complex high-quality components with functional surfaces and structures. Ultra-precision machining is a multi-disciplinary research area that is an important branch of manufacturing technology. It targets the achievement of ultra-precision forms or surface roughness accuracy, forming the backbone and support of today’s innovative technology industries in aerospace, semiconductors, optics, telecommunications, energy, etc. The increasing demand for components with ultra-precision accuracy has stimulated the development of ultra-precision machining technology in recent decades.

This Special Issue aims at attracting researchers to present recent advances and technologies in the aforementioned fields and indicate the future trends for precision and ultra-precision machining.

The scope of this Special Issue includes, but is not limited to, the following topics:

  • Metrology and ultra-precision surface integrity evaluation;
  • Advanced manufacturing technologies, such as turning/milling/grinding/polishing/hybrid processing;
  • Assisted machining technologies;
  • Laser processing and surface treatment;
  • Cooling/lubrication and green manufacturing technologies;
  • Ultra-precision system integration and equipment development;
  • Optimal design of the entire process chain for ultra-precision machining;
  • precision and micro machining, including diamond machining, precision grinding and polishing, EDM, and laser beam machining;
  • Metrology for high-precision characterization of forms, structures, and topography of precision-machined components;
  • Material aspects in precision machining such as surface and subsurface integrity of precision-machined hard and difficult-to-cut materials;
  • Application of process monitoring for sound and robust precision-manufacturing technologies;
  • Post-processing of additive manufactured components.

Dr. Dennis Wee Keong Neo
Guest Editor

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. Machines 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 2400 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.

Published Papers (2 papers)

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Research

23 pages, 3693 KiB  
Article
Prediction and Multiparametric Optimization of the Machined Surface Quality of Tool Steels in Precise Wire Electrical Discharge Machining
by Ľuboslav Straka and Ivan Čorný
Machines 2024, 12(4), 248; https://doi.org/10.3390/machines12040248 - 9 Apr 2024
Viewed by 646
Abstract
This article describes a proposed procedure for multiparametric optimization of the quality of machined surfaces, including mathematical models that can predict the high quality of a precisely machined surface and, at the same time, the high productivity of the process in WEDM of [...] Read more.
This article describes a proposed procedure for multiparametric optimization of the quality of machined surfaces, including mathematical models that can predict the high quality of a precisely machined surface and, at the same time, the high productivity of the process in WEDM of tool steels. The experimental research was carried out using the full DoE factorial design method, which has four technological parameters. The measured output qualitative parameter Surface Roughness (SR) and the output quantitative parameter Material Removal Rate (MRR) were evaluated using the Grey Relational Analysis (GRA) and Analysis of Variance (ANOVA) methods. Multiple Regression Models (MRM) were developed to represent the multiple responses of the investigated tool steels using a regression tool set. The results of the multiparametric optimization revealed a correlation between the input variable parameters of the electrical discharge process, while the favorable results of the observed output-dependent parameters SR and MRR were coupled to the parameters of low peak current I, low value of pulse on-time duration ton, low voltage of discharge U, and high value of pulse off-time duration toff. Based on the multiparametric optimization, key results were obtained that demonstrated the mutual dependence of the observed output process parameters. An optimum SR value of 1.50 μm was obtained with L8-level settings for the input variable parameters I, ton, U, and toff (2 A, 32 μs, 90 V, and 20 μs, respectively) and an MRR value of 12.50 mm3·min−1 was achieved. Full article
(This article belongs to the Special Issue New Advances in Precision and Ultra-Precision Machining Technology)
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18 pages, 6525 KiB  
Article
Numerical Simulation of Rotary Ultrasonic Machining of the Nomex Honeycomb Composite Structure
by Tarik Zarrouk, Mohammed Nouari, Jamal-Eddine Salhi and Abdelkader Benbouaza
Machines 2024, 12(2), 137; https://doi.org/10.3390/machines12020137 - 16 Feb 2024
Cited by 3 | Viewed by 964
Abstract
Nomex honeycomb composite (NHC) cores have seen significant growth in recent years, particularly in the aeronautics, aerospace, naval and automotive industries. This development presents significant challenges in terms of improving machining quality, requiring the use of specialized cutting tools and favorable cutting techniques. [...] Read more.
Nomex honeycomb composite (NHC) cores have seen significant growth in recent years, particularly in the aeronautics, aerospace, naval and automotive industries. This development presents significant challenges in terms of improving machining quality, requiring the use of specialized cutting tools and favorable cutting techniques. In this context, experimental studies have been carried out to highlight the characteristics of the milling of NHCs by rotary ultrasonic machining (RUM). However, the rapid motion of the cutting tool and the inaccessibility of the tool/part interface prevent the visualization of the chip formation process. For this purpose, a three-dimensional numerical model for milling the NHC structure using RUM technology was developed by Abaqus Explicit software. On the basis of this model, the components of the cutting force, the quality of the machined surface and the chip accumulation in front of the cutting tool were analyzed. The numerical results agree with the experimental tests, demonstrating that the use of RUM technology effectively reduces the cutting force components. An in-depth analysis of the influence of feed component Fy on the quality of the generated surface was carried out, revealing that the surface quality improved with low values of feed component Fy. Furthermore, the impact of ultrasonic vibrations on the accumulation of chips in front of the cutting tool is particularly optimized, in particular for large amplitudes. Full article
(This article belongs to the Special Issue New Advances in Precision and Ultra-Precision Machining Technology)
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