PSI - Issue 59

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 59 (2024) 779–785

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers Abstract Statistical analysis of the structure of heavy machine tool operating time shows that a significant share of its downtime is associated with the maintenance of the technological system. As criteria for selecting the optimal maintenance strategy for the technological system, we propose: its readiness function, the mathematical model of which is obtained using the theory of Markov processes. It is proposed to evaluate the reliability of the assembly tools by means of a complex indicator of the readiness factor, which, unlike the previously used indicators, characterizes not only its failure-free operation, but also its maintainability. Mathematical models have been obtained for determining the readiness function of prefabricated cutting tools as a system of sequential elements by means of reliability theory, the application of which can be used at the stage of tool design to distribute a given level of reliability of the entire turning cutter between the elements of its design, and at the stage of operation - to determine the probability of tool failure-free operation taking into account the features of its design. The results of laboratory and operational tests have shown that an increase in the stability of cutting properties of a tool can be achieved by treating it with a pulsed magnetic field, after which the average tool durability period increases insignificantly, but the gamma-percentage period increases by 2 and more times. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) Methods of increasing reliability of cutting tools for heavy machine tools Viktor Kovalov*, Galyna Klymenko, Yana Vasylchenko, Maksym Shapovalov, Anastasiya Sherbakova, Anton Kovalenko Donbas State Engineering Academy, 84313 Kramatorsk, Ukraine

Peer-review under responsibility of the conference Guest Editors Keywords: cutting tool, technological system, reliability, cutting stability

* Corresponding author. Tel.: +380663360808 E-mail address: kovalov.viktor@gmail.com

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the conference Guest Editors

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of DMDP 2023 Organizers 10.1016/j.prostr.2024.04.111