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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">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">31245</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2022-23-1-47-56</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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Elimination of causes of crack formation in the slider of a powerful crank forming press</article-title><trans-title-group xml:lang="ru"><trans-title>Устранение причин трещинообразования в ползуне мощного кривошипного штамповочного пресса</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5569-9320</contrib-id><name-alternatives><name xml:lang="en"><surname>Kornilova</surname><given-names>Anna V.</given-names></name><name xml:lang="ru"><surname>Корнилова</surname><given-names>Анна Владимировна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, Professor of the Department of Testing of Structures</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры испытания сооружений</p></bio><email>anna44@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0131-1399</contrib-id><name-alternatives><name xml:lang="en"><surname>Zaya</surname><given-names>Kyaw</given-names></name><name xml:lang="ru"><surname>Заяр</surname><given-names>Чжо</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate, Department of Composite Materials</p></bio><bio xml:lang="ru"><p>аспирант, кафедра композиционных материалов</p></bio><email>k.kyawzaya@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University of Civil Engineering (National Research University)</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Московский государственный строительный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow State Technological University “STANKIN”</institution></aff><aff><institution xml:lang="ru">Московский государственный технологический университет «СТАНКИН»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-06-19" publication-format="electronic"><day>19</day><month>06</month><year>2022</year></pub-date><volume>23</volume><issue>1</issue><issue-title xml:lang="en">VOL 23, NO1 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 23, №1 (2022)</issue-title><fpage>47</fpage><lpage>56</lpage><history><date date-type="received" iso-8601-date="2022-06-19"><day>19</day><month>06</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Kornilova A.V., Zaya K.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Корнилова А.В., Заяр Ч.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Kornilova A.V., Zaya K.</copyright-holder><copyright-holder xml:lang="ru">Корнилова А.В., Заяр Ч.</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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/31245">https://journals.rudn.ru/engineering-researches/article/view/31245</self-uri><abstract xml:lang="en"><p style="text-align: justify;">It is known that during long-term operation of crank machines for cold sheet stamping, which consists in cyclic loading of the structure with mechanical stresses, fatigue degradation of the metal occurs, leading to the occurrence and growth of cracks. Nevertheless, the main trend of modern Russian approaches to modernizing the park of forging and pressing machines is the desire to preserve large metal-consuming parts of stamping presses when replacing the control system and hydraulic and/or pneumatic components of additional actuators. Practice has shown that such approach is economically and technologically justified. For countries that do not have the capacity to manufacture stamping machines of their own brands, there is a need to purchase equipment abroad (including Russia), usually for economic reasons in the secondary market after a long period of operation. In this case, competent pre-sale preparation is required in order to avoid emergencies and equipment failures after its installation at the purchasing enterprise. Ensuring the durability of crank stamping machines after a period of long-term operation is an urgent task, both for the industry of developing countries and for the Russian one. Using the example of a powerful crank stamping press, during the pre-sale preparation of which cracks in the slider were revealed, a way to eliminate the causes of cracking during its further operation is shown.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Известно, что при длительной эксплуатации кривошипных машин для холодной листовой штамповки, заключающейся в циклическом нагружении конструкции механическими напряжениями, происходит усталостная деградация металла, приводящая к возникновению и росту трещин. Тем не менее основной тенденцией современных российских подходов к модернизации парка кузнечно-прессовых машин является стремление сохранить крупногабаритные металлоемкие детали штамповочных прессов при замене системы управления и узлов гидравлики и/или пневматики дополнительных исполнительных механизмов. Как показала практика, такой подход экономически и технологически оправдан. Страны, у которых нет мощностей для изготовления штамповочных машин собственных марок, покупают оборудование за рубежом (в том числе в России), как правило, из экономических соображений на рынке вторичных продаж после длительного периода эксплуатации. В этом случае требуется грамотная предпродажная подготовка, чтобы избежать аварийных ситуаций и отказов оборудования после его монтажа на предприятии-покупателе. Обеспечение долговечности кривошипных штамповочных машин после периода длительной эксплуатации - актуальная задача как для промышленности развивающихся стран, так и для российской. На примере мощного кривошипного листоштамповочного пресса, в процессе предпродажной подготовки которого выявлены трещины в ползуне, показан способ устранения причин трещинообразования при его дальнейшей эксплуатации.</p></trans-abstract><kwd-group xml:lang="en"><kwd>crank press</kwd><kwd>slider</kwd><kwd>metal fatigue cracks</kwd><kwd>stiffeners</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>кривошипный пресс</kwd><kwd>ползун</kwd><kwd>усталость металла</kwd><kwd>трещины</kwd><kwd>ребра жесткости</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Trukhin YuG, Chukardin VI. On the problems of development of the industry of production of forging and pressing equipment in Russia. Forging and Stamping Production. Material Working by Pressure. 2021;(2):44–48. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Трухин Ю.Г., Чукардин В.И. 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