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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Frontier Materials &amp; Technologies</journal-id><journal-title-group><journal-title xml:lang="en">Frontier Materials &amp; Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Frontier Materials &amp; Technologies</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-4039</issn><issn publication-format="electronic">2782-6074</issn><publisher><publisher-name xml:lang="en">Togliatti State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">131</article-id><article-id pub-id-type="doi">10.18323/2073-5073-2021-1-32-41</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Development of turning process digital twin based on machine learning</article-title><trans-title-group xml:lang="ru"><trans-title>Разработка цифрового двойника процесса точения на основе машинного обучения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6298-1068</contrib-id><name-alternatives><name xml:lang="en"><surname>Rastorguev</surname><given-names>Dmitriy A.</given-names></name><name xml:lang="ru"><surname>Расторгуев</surname><given-names>Дмитрий Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Engineering), assistant professor of Chair “Equipment and Technologies of Machine Building Production”</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры «Оборудование и технологии машиностроительного производства»</p></bio><email>rast_73@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7465-650X</contrib-id><name-alternatives><name xml:lang="en"><surname>Sevastyanov</surname><given-names>Aleksandr A.</given-names></name><name xml:lang="ru"><surname>Севастьянов</surname><given-names>Александр Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>graduate student of Chair “Equipment and Technologies of Machine Building Production”</p></bio><bio xml:lang="ru"><p>магистрант кафедры «Оборудование и технологии машиностроительного производства»</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Togliatti State University, Togliatti (Russia)</institution></aff><aff><institution xml:lang="ru">Тольяттинский государственный университет, Тольятти (Россия)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-03-31" publication-format="electronic"><day>31</day><month>03</month><year>2021</year></pub-date><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>32</fpage><lpage>41</lpage><history><date date-type="received" iso-8601-date="2021-03-31"><day>31</day><month>03</month><year>2021</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://vektornaukitech.ru/jour/article/view/131">https://vektornaukitech.ru/jour/article/view/131</self-uri><abstract xml:lang="en"><p>Today, manufacturing technologies are developing within the Industry 4.0 concept, which is the information technologies introduction in manufacturing. One of the most promising digital technologies finding more and more application in manufacturing is a digital twin. A digital twin is an ensemble of mathematical models of technological process, which exchanges information with its physical prototype in real-time. The paper considers an example of the formation of several interconnected predictive modules, which are a part of the structure of the turning process digital twin and designed to predict the quality of processing, the chip formation nature, and the cutting force.  The authors carried out a three-factor experiment on the hard turning of 105WCr6 steel hardened to 55 HRC. Used an example of the conducted experiment, the authors described the process of development of the digital twin diagnostic module based on artificial neural networks. When developing a mathematical model for predicting and diagnosing the cutting process, the authors revealed higher accuracy, adaptability, and versatility of artificial neural networks. The developed mathematical model of online diagnostics of the cutting process for determining the surface quality and chip type during processing uses the actual value of the cutting depth determined indirectly by the force load on the drive. In this case, the model uses only the signals of the sensors included in the diagnostic subsystem on the CNC machine. As an informative feature reflecting the force load on the machine’s main motion drive, the authors selected the value of the energy of the current signal of the spindle drive motor. The study identified that the development of a digital twin is possible due to the development of additional modules predicting the accuracy of dimensions, geometric profile, tool wear.</p></abstract><trans-abstract xml:lang="ru"><p>На сегодняшний день производственные технологии развиваются в рамках концепции «Индустрия 4.0», которая представляет собой внедрение информационных технологий в промышленности. Одной из наиболее перспективных цифровых технологий, находящей все большее применение в производстве, является цифровой двойник, представляющий собой ансамбль математических моделей технологического процесса, который обменивается информацией со своим физическим прототипом в режиме реального времени. В работе рассматривается пример формирования нескольких взаимосвязанных прогнозирующих модулей, входящих в структуру цифрового двойника процесса точения и предназначенных для прогнозирования качества обработки, характера стружкообразования, силы резания. Проведен трехфакторный эксперимент по твердому точению стали ХВГ, закаленной до твердости 55 HRC. На примере проведенного эксперимента описан процесс разработки диагностического модуля цифрового двойника на основе искусственных нейронных сетей. Выявлены более высокие точность, адаптивность и универсальность искусственных нейронных сетей при разработке математической модели для прогнозирования и диагностики процесса резания. Разработанная математическая модель онлайн-диагностики процесса резания для определения качества поверхности и типа стружки при обработке использует фактическое значение снимаемого припуска, определяемого косвенно по силовой нагрузке на приводе. При этом модель использует только сигналы датчиков, входящих в диагностическую подсистему на станке с ЧПУ. В качестве информативного признака, отражающего силовую нагрузку на приводе главного движения станка, выбрано значение энергии сигнала силы тока в моторе привода шпинделя. Установлено, что развитие цифрового двойника возможно за счет разработки дополнительных модулей, прогнозирующих точность размеров, геометрический профиль, износ инструмента.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hard turning</kwd><kwd>CNC machines</kwd><kwd>digital twin</kwd><kwd>machine learning</kwd><kwd>artificial neural networks</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>твердое точение</kwd><kwd>станки с ЧПУ</kwd><kwd>цифровой двойник</kwd><kwd>машинное обучение</kwd><kwd>искусственные нейронные сети</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The project is supported by the Fund for the Promotion of the Development of Civil Society Institutions in Privolzhsky Federal District</funding-statement><funding-statement xml:lang="ru">Проект реализуется при поддержке Фонда содействия развитию институтов гражданского общества в ПФО.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Altintas Y. 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