Special Issue "Precision Machining"

A special issue of Machines (ISSN 2075-1702).

Deadline for manuscript submissions: 28 February 2018

Special Issue Editor

Guest Editor
Prof. Dr. Angelos P. Markopoulos

Section of Manufacturing Technology, School of Mechanical Engineering, National Technical University of Athens
Website | E-Mail
Interests: precision machining; micromachining; non-conventional machining; grinding; nano-manufacturing; cutting tools; difficult-to-machine materials; finite elements simulation; molecular dynamics; soft computing; nanomaterials

Special Issue Information

Dear Colleagues,

Material removal processes are considered exceptionally important manufacturing methods used, worldwide, for the production of mechanical components. A key feature of these processes is their ability to produce final products with high accuracy and of high quality. Conventional and non-conventional machining, as well as abrasive processes, are vital for the production of high quality components from many different materials categories. Automotive, aerospace and medical industries are only some of the sectors that machined components of high dimensional accuracy, exceptional properties, complex sizes and usually from difficult-to-machine materials, are employed.

The research in the refinement of machining or the introduction of new features is ongoing and fast-growing. Precision machining on large scale components but in the micro- and nano-regime as well, concentrate the interest of the researchers. In the success of the research there are other aspects that need to be considered as the machine tools design and control, cutting tools, metrology and quality control, manufacturing systems and automation and of course modeling and simulation with various methods such as finite elements method, molecular dynamics and soft computing.

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

 Prof. Dr. Angelos P. Markopoulos

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 papers will be 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 quarterly 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 350 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

  • Precision machining

  • Micro- and nano- machining

  • Machine tools

  • Abrasive processes

  • Non-conventional machining

  • Modeling and simulation

  • Surface quality and integrity

  • Manufacturing systems

  • Precision engineering

  • Nanomaterials

Published Papers (2 papers)

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Research

Open AccessArticle Numerical and Experimental Characterization of a Railroad Switch Machine
Machines 2018, 6(1), 6; doi:10.3390/machines6010006
Received: 15 January 2018 / Revised: 10 February 2018 / Accepted: 12 February 2018 / Published: 17 February 2018
PDF Full-text (741 KB)
Abstract
This contribution deals with the numerical and experimental characterization of the structural behavior of a railroad switch machine. Railroad switch machines must meet a number of safety-related conditions such as, for instance, exhibiting the appropriate resistance against any undesired movements of the points
[...] Read more.
This contribution deals with the numerical and experimental characterization of the structural behavior of a railroad switch machine. Railroad switch machines must meet a number of safety-related conditions such as, for instance, exhibiting the appropriate resistance against any undesired movements of the points due to the extreme forces exerted by a passing train. This occurrence can produce very high stress on the components, which has to be predicted by designers. In order to assist them in the development of new machines and in defining what the critical components are, FEA models have been built and stresses have been calculated on the internal components of the switch machine. The results have been validated by means of an ad-hoc designed experimental apparatus, now installed at the facilities of the Department of Industrial Engineering of the University of Bologna. This apparatus is particularly novel and original, as no Standards are available that provide recommendations for its design, and no previous studies have dealt with the development of similar rigs. Moreover, it has wide potential applications for lab tests aimed at assessing the safety of railroad switch machines and the fulfilment of the specifications by many railway companies. Full article
(This article belongs to the Special Issue Precision Machining)
Open AccessArticle A Methodology for the Lightweight Design of Modern Transfer Machine Tools
Machines 2018, 6(1), 2; doi:10.3390/machines6010002
Received: 10 December 2017 / Revised: 7 January 2018 / Accepted: 11 January 2018 / Published: 14 January 2018
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Abstract
This paper deals with a modern design approach via finite elements in the definition of the main structural elements (rotary table and working unit) of an innovative family of transfer machine tools. Using the concepts of green design and manufacture, as well as
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This paper deals with a modern design approach via finite elements in the definition of the main structural elements (rotary table and working unit) of an innovative family of transfer machine tools. Using the concepts of green design and manufacture, as well as sustainable development thinking, the paper highlights the advantages derived from their application in this specific field (i.e., the clever use of lightweight materials to allow ruling out high-consumption hydraulic pump systems). The design is conceived in a modular way, so that the final solution can cover transfers from four to 15 working stations. Two versions of the machines are examined. The first one has a rotary table with nine divisions, which can be considered as a prototype: this machine has been studied in order to set up the numerical predictive model, then validated by experimental tests. The second one, equipped with a rotary table with 15 divisions, is the biggest of the range: this machine has been entirely designed with the aid of the previously developed numerical model. The loading input forces for the analyses have been evaluated experimentally via drilling operations carried out on a three-axis CNC unit. The definition of the design force made it possible to accurately assess both the rotary table and the working units installed in the machine. Full article
(This article belongs to the Special Issue Precision Machining)
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