New Advances in Precision Machining

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

Deadline for manuscript submissions: 30 September 2024 | Viewed by 3127

Special Issue Editor


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Guest Editor
Department of Mechanical Engineering, Karabük University, Karabük, Turkey
Interests: machining; mechanics of material; finite element method

Special Issue Information

Dear Colleagues,

The manufacturing of high-precision parts is always an adventure in itself, and the complexity of the parts is determined not only by the manufacturing tolerances but also by the material and the geometric forms that it has. In the manufacturing industry, the term "precision machining" refers to single-digit tolerances at the micron level, while ultra-precision machining refers to submicron values. Precision machining emerges as a need for many industries: aerospace, fluids, medical, dental, sports, and high-tech fields. New technological areas, where smaller and more complex parts are being used intensively, are increasingly in need of precision machining processes.

This Special Issue addresses numerous research challenges in different fields, including precision machining technologies, novel machining processes, cutting mechanics, surface generation mechanisms, novel machine design, advanced sensing, machine metrology, accurate control of the machining process through the modeling and simulation of precision machining processes, materials sciences, measurement and on-machine metrology, as well as advanced applications for functional uses. This Special Issue aims to provide a good collection of the latest research results and findings in recent advances in precision machining technology and applications.

Dr. Mehmet Erdi Korkmaz
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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15 pages, 4483 KiB  
Article
Selected Aspects of Precision Machining on CNC Machine Tools
by Jozef Peterka, Marcel Kuruc, Vitalii Kolesnyk, Ivan Dehtiarov, Jana Moravcikova, Tomas Vopat, Peter Pokorny, Frantisek Jurina and Vladimir Simna
Machines 2023, 11(10), 946; https://doi.org/10.3390/machines11100946 - 10 Oct 2023
Viewed by 1188
Abstract
The work is new due to the type of process used—ultrasonic precision machining—to determine the possible effect of spindle heating (long-term machining) on the precision of the flat surface. It was carried out on a precise ultrasonic machining machine, and the material of [...] Read more.
The work is new due to the type of process used—ultrasonic precision machining—to determine the possible effect of spindle heating (long-term machining) on the precision of the flat surface. It was carried out on a precise ultrasonic machining machine, and the material of workpiece was ceramic Al2O3. A flat surface was machined. Such an experiment has not been feasible until now. The experiment was divided into two days. On the first day, the machining time was 4 h. It is a long enough time to create a temperature-steady state. On the second day, with a cold tool and cold machine tool, we continued where we left off on the first day. This is how we monitored the accuracy of the dimensions of the workpiece on the plane surface. We have achieved the following: The average interface depth achieved values of 0.007089 mm and 0.003667 mm for cold and heated spindles, respectively. It means that when the spindle is not heated, the depth of the interface is higher by 93% (almost double the depth). The average standard deviation of the interface depth is 0.001683 mm and 0.000997 mm for cold and heated spindles, respectively. It means that when the spindle is not heated, the process is not as stable, and the standard deviation is higher by 69%. Full article
(This article belongs to the Special Issue New Advances in Precision Machining)
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14 pages, 4498 KiB  
Article
The Transverse Vibration Characteristics of Circular Saw Blade on Mobile Cantilever-Type CNC Sawing Machine
by Xinyu Yan, Yunqi Cui, Hongru Qiu, Tao Ding, Nanfeng Zhu and Baojin Wang
Machines 2023, 11(5), 549; https://doi.org/10.3390/machines11050549 - 12 May 2023
Cited by 2 | Viewed by 1544
Abstract
A circular saw blade is a commonly used tool in wood processing. The transverse vibration of the saw blade plays an important role in processing quality during cutting and affects its service life as well. In the study, the transverse vibration of the [...] Read more.
A circular saw blade is a commonly used tool in wood processing. The transverse vibration of the saw blade plays an important role in processing quality during cutting and affects its service life as well. In the study, the transverse vibration of the circular saw blade was investigated at the constant rotation by the simulation using ANSYS software when changing the cantilever length of the cantilever woodworking CNC circular saw machine. Meanwhile, the transverse vibration of the circular saw blade without and with load was explored by the eddy current sensors for when the detection point was differently away from the center of the circular saw blade. The time domain, probability density distribution, and power spectrum characteristics of the transverse vibration signal were analyzed, and the simulation values were compared with the actual cutting data. The results revealed that under certain conditions, the maximum transverse vibration value of the circular saw blade was the smallest in the simulation, then the middle in no-load, and the largest in actual cutting. The maximum transverse vibration value of the saw blade was increased with the extension of the cantilevered overhang, but gradually and slightly, indicating the transverse vibration was hardly affected by the change in overhang length of less than 300 mm. The finding provides the reference for the structural optimization design of cantilever CNC circular saw machines and the promotion of its application. Full article
(This article belongs to the Special Issue New Advances in Precision Machining)
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