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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Obrabotka Metallov / Metal Working and Material Science</journal-id><journal-title-group><journal-title xml:lang="en">Obrabotka Metallov / Metal Working and Material Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Обработка металлов (технология • оборудование • инструменты)</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1994-6309</issn><issn publication-format="electronic">2541-819X</issn><publisher><publisher-name xml:lang="en">Новосибирский государственный технический университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">392256</article-id><article-id pub-id-type="doi">10.17212/1994-6309-2026-28.1-233-252</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>EQUIPMENT. INSTRUMENTS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОБОРУДОВАНИЕ. ИНСТРУМЕНТЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Payback assessment of the metal–composite technology for modular drill bodies based on an experimentally confirmed increase in cutting head tool life</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка окупаемости металл-композитной технологии корпусов сборных сверл на основе экспериментально подтвержденного повышения стойкости режущей головки</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6131-3217</contrib-id><contrib-id contrib-id-type="scopus">57220289616</contrib-id><contrib-id contrib-id-type="researcherid">AAF-5358-2020</contrib-id><contrib-id contrib-id-type="spin">9782-6737</contrib-id><name-alternatives><name xml:lang="en"><surname>Lubimyi</surname><given-names>Nikolay S.</given-names></name><name xml:lang="ru"><surname>Любимый</surname><given-names>Николай Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D. (Engineering), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. техн. наук, доцент</p></bio><email>nslubim@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5809-4458</contrib-id><contrib-id contrib-id-type="scopus">57415919700</contrib-id><contrib-id contrib-id-type="researcherid">JXM-8999-2024</contrib-id><contrib-id contrib-id-type="spin">3387-5740</contrib-id><name-alternatives><name xml:lang="en"><surname>Polshin</surname><given-names>Andrey A.</given-names></name><name xml:lang="ru"><surname>Польшин</surname><given-names>Андрей Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>laboratory researcher</p></bio><bio xml:lang="ru"><p>лаборант-исследователь</p></bio><email>info@polshin.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1801-6767</contrib-id><contrib-id contrib-id-type="scopus">56105163000</contrib-id><contrib-id contrib-id-type="researcherid">E-5233-2014</contrib-id><contrib-id contrib-id-type="spin">8046-2647</contrib-id><name-alternatives><name xml:lang="en"><surname>Chetverikov</surname><given-names>Boris S.</given-names></name><name xml:lang="ru"><surname>Четвериков</surname><given-names>Борис Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D. (Engineering), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. техн. наук, доцент</p></bio><email>await_rescue@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2997-3282</contrib-id><contrib-id contrib-id-type="scopus">57201774823</contrib-id><contrib-id contrib-id-type="spin">5230-3519</contrib-id><name-alternatives><name xml:lang="en"><surname>Zagorodniy</surname><given-names>Nikolay A.</given-names></name><name xml:lang="ru"><surname>Загородний</surname><given-names>Николай Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D. (Engineering), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. техн. наук, доцент</p></bio><email>n.zagorodnij@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0878-3658</contrib-id><contrib-id contrib-id-type="scopus">59005514300</contrib-id><contrib-id contrib-id-type="spin">4174-6234</contrib-id><name-alternatives><name xml:lang="en"><surname>Maltsev</surname><given-names>Ardalion K.</given-names></name><name xml:lang="ru"><surname>Мальцев</surname><given-names>Ардалион Константинович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D. (Engineering) student</p></bio><bio xml:lang="ru"><p>аспирант</p></bio><email>ardalion_bgtu@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-2133-885X</contrib-id><contrib-id contrib-id-type="researcherid">OKT-0643-2025</contrib-id><contrib-id contrib-id-type="spin">1598-9839</contrib-id><name-alternatives><name xml:lang="en"><surname>Bytsenko</surname><given-names>Mikhail V.</given-names></name><name xml:lang="ru"><surname>Быценко</surname><given-names>Михаил Витальевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Student</p></bio><bio xml:lang="ru"><p>Студент</p></bio><email>b.michutka2005@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Belgorod State Technological University named after V.G. Shukhov</institution></aff><aff><institution xml:lang="ru">Белгородский государственный технологический университет им. В.Г. Шухова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2026</year></pub-date><volume>28</volume><issue>1</issue><issue-title xml:lang="en">VOL 28, NO1 (2026)</issue-title><issue-title xml:lang="ru">ТОМ 28, №1 (2026)</issue-title><fpage>233</fpage><lpage>252</lpage><history><date date-type="received" iso-8601-date="2026-03-07"><day>07</day><month>03</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Lubimyi N.S., Polshin A.A., Chetverikov B.S., Zagorodniy N.A., Maltsev A.K., Bytsenko M.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Любимый Н.С., Польшин А.А., Четвериков Б.С., Загородний Н.А., Мальцев А.К., Быценко М.В.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Lubimyi N.S., Polshin A.A., Chetverikov B.S., Zagorodniy N.A., Maltsev A.K., Bytsenko M.V.</copyright-holder><copyright-holder xml:lang="ru">Любимый Н.С., Польшин А.А., Четвериков Б.С., Загородний Н.А., Мальцев А.К., Быценко М.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rcsi.science/1994-6309/article/view/392256">https://journals.rcsi.science/1994-6309/article/view/392256</self-uri><abstract xml:lang="en"><p><bold>Introduction. </bold>Metal–composite technology (MCT) for modular drill bodies, based on an additively manufactured thin-walled metal shell with internal coolant channels followed by metal–polymer infill, offers a way to enhance functional coolant delivery while reducing the additive metal volume. However, industrial adoption requires a transparent techno-economic justification that links manufacturing costs with in-service outcomes under a real drilling program. <bold>The purpose of the work </bold>is to assess the payback of MCT modular drill bodies using an experimentally validated increase in the tool life of a replaceable carbide cutting head and to outline the economically feasible application domain of the technology. <bold>Methodology.</bold> Two manufacturing routes were compared: a baseline subtractive route for a conventional drill body and the MCT route combining SLM shell fabrication, vibro-vacuum polymer infill, and final machining. Payback was evaluated using an integrated model that includes (a) manufacturing cost per body represented as variable costs plus one-time batch costs, and (b) in-service economics expressed through a cost-per-hole metric driven by the consumption rate of replaceable cutting heads within a fixed drilling program. Industrial drilling trials provided the tool-life input; the end of life of the cutting head was defined by a flank wear criterion of VB = 0.3 mm. <bold>Results and discussion.</bold> Topology optimization of the MCT body reduced the SLM metal volume and, consequently, the additive manufacturing cost component. Industrial validation demonstrated an increase in cutting-head tool life from 541 holes for the baseline body to 618 holes for the MCT body (+14.2%) . For a representative drilling program of 235,000 holes, the model predicts a reduced number of cutting heads and a positive overall economic effect dominated by the in-service component, while the manufacturing component can further shift the balance depending on batch size and one-time setup costs. <bold>Conclusions.</bold> The proposed framework enables mapping the economic feasibility of MCT drill bodies as a function of batch size, drilling volume, and cutting-head cost, providing decision-support criteria for industrial implementation.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Металл-композитная технология (МКТ) изготовления корпусов сборных сверл на основе аддитивно сформированной тонкостенной металлической оболочки с внутренними каналами подачи СОТС и последующего заполнения металлополимером позволяет повысить функциональность охлаждения, однако требует технико-экономического обоснования применимости в производстве. <bold>Цель работы:</bold> оценить окупаемость МКТ-корпусов сборных сверл на основе экспериментально подтвержденного повышения стойкости сменной твердосплавной режущей головки. <bold>Метод и методология.</bold> Сравнивались два маршрута изготовления корпуса: базовый субтрактивный и МКТ (SLM-оболочка + вибро-вакуумное заполнение + финишная мехобработка). Окупаемость оценивалась интегральной моделью, объединяющей себестоимость изготовления корпуса как сумму переменных затрат и разовых затрат на партию, а также эксплуатационную экономику через снижение потребности в сменных режущих головках при заданной программе сверления. Экспериментальные входные данные по стойкости получены при промышленных испытаниях сверления; критерий предельного состояния инструмента – износ по задней поверхности VB = 0,3 мм. <bold>Результаты и обсуждение.</bold> Показано, что топологическая оптимизация конструкции МКТ-корпуса снижает объем SLM-печати металлической части и соответствующие затраты на аддитивное формообразование. В промышленных испытаниях получен прирост стойкости режущей головки до 618 отверстий против 541 отверстия для базового исполнения, что соответствует увеличению стойкости на 14,2 %. На примере производственной программы 235 000 отверстий показано уменьшение потребности в режущих головках и положительный экономический эффект, формируемый преимущественно за счет эксплуатационной составляющей. <bold>Выводы.</bold> Предложенная методика позволяет определять границы экономически эффективного применения МКТ-корпусов в зависимости от серийности изготовления, объема сверления и стоимости сменной режущей головки.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Metal-composite systems</kwd><kwd>Additive manufacturing</kwd><kwd>Tool life</kwd><kwd>Metal–polymer</kwd><kwd>Drilling</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Металл-композитные системы</kwd><kwd>Аддитивные технологии</kwd><kwd>Стойкость</kwd><kwd>Металлополимер</kwd><kwd>Сверление</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This study was supported by the Russian Science Foundation (grant No. 23-79-10022), https://rscf.ru/project/23-79-10022/. The research was carried out using the equipment from the High Technologies Center of BSTU named after V.G. Shukhov.</funding-statement><funding-statement xml:lang="ru">Исследование выполнено при поддержке гранта Российского научного фонда № 23-79-10022, https://rscf.ru/project/23-79-10022/ . Исследование выполнено с использованием оборудования на базе Центра высоких технологий БГТУ им. В.Г. Шухова.</funding-statement></funding-group></article-meta><fn-group><fn xml:lang="en"><p><italic>Funding</italic></p> <p>This study was supported by the Russian Science Foundation (grant No. 23-79-10022), https://rscf.ru/project/23-79-10022/</p> <p><italic>Acknowledgements</italic></p> <p>The research was carried out using the equipment from the High Technologies Center of BSTU named after V.G. Shukhov.</p></fn><fn xml:lang="ru"><p><italic>Финансирование</italic></p> <p>Исследование выполнено при поддержке гранта Российского научного фонда № 23-79-10022, https://rscf.ru/project/23-79-10022/</p> <p><italic>Благодарности</italic></p> <p>Исследование выполнено с использованием оборудования на базе Центра высоких технологий БГТУ им. В.Г. Шухова.</p></fn></fn-group></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Assessment of metal cutting tools using cost performance ratio and tool life analyses / D. Johansson, R. Lindvall, C. Windmark, R. M’;Saoubi, A. Can, V. Bushlya, J.E. Ståhl // Procedia Manufacturing. – 2019. – Vol. 38. – P. 816–823. – DOI: 10.1016/j.promfg.2020.01.114.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Reducing the cost of 3D metal printing using selective laser melting (SLM) technology in the manufacture of a drill body by reinforcing thin-walled shell forms with met-al-polymers / N.S. Lubimyi, M. 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