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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">blackmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Черная Металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-0797</issn><issn pub-type="epub">2410-2091</issn><publisher><publisher-name>National University of Science and Technology "MISIS"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0368-0797-2017-10-777-784</article-id><article-id custom-type="elpub" pub-id-type="custom">blackmet-1153</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕТАЛЛУРГИЧЕСКИЕ ТЕХНОЛОГИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METALLURGICAL TECHNOLOGIES</subject></subj-group></article-categories><title-group><article-title>УПРОЩЕННЫЙ МЕТОД РАСЧЕТА ИЗГИБАЮЩИХ МОМЕНТОВ СТАЛЬНОГО ЛИСТА И РЕАКЦИЙ РАБОЧИХ РОЛИКОВ В МНОГОРОЛИКОВОЙ ПРАВИЛЬНОЙ МАШИНЕ</article-title><trans-title-group xml:lang="en"><trans-title>SIMPLIFIED METHOD FOR CALCULATION OF BENDING MOMENTS OF STEEL SHEET AND REACTIONS OF WORKING ROLLERS IN MULTIROLL STRAIGHTENING MACHINE</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шинкин</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Shinkin</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.ф.-м.н., профессор кафедры физики,</p><p>119049, Москва, Ленинский пр-т, 4</p></bio><bio xml:lang="en"><p>Dr. Sci. (Phys.–Math.), Professor of the Chair of Physics</p></bio><email xlink:type="simple">shinkin-korolev@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology “MISIS” (MISIS)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>26</day><month>11</month><year>2017</year></pub-date><volume>60</volume><issue>10</issue><fpage>777</fpage><lpage>784</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шинкин В.Н., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Шинкин В.Н.</copyright-holder><copyright-holder xml:lang="en">Shinkin V.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://fermet.misis.ru/jour/article/view/1153">https://fermet.misis.ru/jour/article/view/1153</self-uri><abstract><p>Главной задачей технологии правки стального листа является вычисление оптимальных обжатий стальной заготовки рабочими роликами листоправильных машин таким образом, чтобы лист на выходе из машины имел минимальные остаточные напряжения и кривизну. При математическом и численном моделировании процесса правки стального листа в многороликовых правильных машинах вначале вычисляют кривизну и изгибающие моменты стального листа в точках касания с рабочими роликами машины, а затем рассчитывают энергосиловые параметры правки листа. Вычисление энергосиловых параметров многороликовых листоправильных машин является важным технологическим расчетом при правке стального листа. В основу энергосилового расчета входит вычисление реакций опор рабочих роликов и усилий верхней и нижней кассет рабочих роликов правильной машины при правке. При недостаточном изгибающем моменте стального листа невозможно устранить вредные остаточные напряжения в стенке листа и поверхностные дефекты листа. При недостаточном усилии верхней кассеты роликов невозможно достигнуть требуемого обжатия листа для качественной правки. Чрезмерные значения крутящих моментов роликов и усилий кассет роликов часто приводят к дефектам листа, поломке рабочих и опорных роликов и поломке всей листоправильной машины. В настоящей работе предложен приближенный метод расчета оптимальных технологических параметров холодной правки стального листа на многороликовой листоправильной машине. Расчеты позволяют определить вид и кривизну нейтральной плоскости стального листа при правке, остаточную кривизну листа после правки, изгибающие моменты листа и реакции опор рабочих роликов, остаточные напряжения в стенке стального листа, долю пластической деформации по толщине листа и относительную деформацию продольных поверхностных волокон листа при правке в зависимости от радиуса рабочих роликов, шага между роликами листоправильной машины, величины обжатия листа верхними роликами, толщины листа, а также модуля Юнга, предела текучести и модуля упрочнения металла листа. Результаты исследований могут быть широко использованы на машиностроительных и металлургических заводах.</p></abstract><trans-abstract xml:lang="en"><p>The main task of the technology of the steel sheet flattening is to calculate the optimal reduction of a sheet billet by the working rollers of straightening machines so that the sheet at the outlet from the machine has the minimum residual stress and curvature. In the mathematical and numerical modeling of the steel sheet flattening process in the multiroll straightening machines, in the beginning we calculate the curvature and bending moments of the steel sheet at the points of the tangency with the machine’s working rollers, and then we calculate the energy-power parameters of the sheet’s flattening. The calculation of energy-power parameters of the multiroll sheet-straightening machines is an important technological estimation at the steel sheet’s flattening. The basis of energy-power calculation includes the estimation of the support reactions of working rollers and the efforts of upper and lower rollers’ cassettes of straightening machine at the sheet flattening. When there is an insufficient bending moment of steel sheet, it is impossible to eliminate the harmful residual stresses in the sheet wall and the surface defects of the sheet. If the force of the upper cassette rollers is insufficient, then to achieve the required reduction of the sheet for the quality flattening is impossible. The excessive values of the rollers’torque moments and the efforts of rollers’ cassettes often lead to the sheet defects, breakage of the working and supporting rollers and breakage of whole sheet-straightening machine. The approximate method for determining the optimal technological parameters of steel sheet cold flattening on multiroll sheet-straightening machine is proposed in this paper. The calculations allow us to determine the type and curvature of neutral plane of the steel sheet under flattening, residual curvature of the sheet after flattening, sheet’s bending moments, support reactions of working rollers, residual stresses in the wall of the steel sheet, proportion of plastic deformation on the sheet thickness and the relative deformation of the longitudinal surface fibers of the sheet under the flattening depending on the rollers’ radius, the pitch between the straightening machines’ working rolls, magnitude of the sheet reduction by the upper rollers, the sheet thickness, as well as the elastic modulus, yield stress and hardening modulus of the sheet metal. The research results can be widely used at the engineering and metallurgical plants.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стальной лист</kwd><kwd>многороликовые листоправильные машины</kwd><kwd>рабочие и опорные ролики</kwd><kwd>кривизна листа</kwd><kwd>знакопеременный изгиб</kwd><kwd>изгибающие моменты листа</kwd><kwd>упругопластическая среда с линейным упрочнение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>steel sheet</kwd><kwd>multiroll sheet-straightening machines</kwd><kwd>working and support rollers</kwd><kwd>sheet’s curvature</kwd><kwd>alternating bending</kwd><kwd>sheet’s bending moments</kwd><kwd>elastoplastic continuous medium with linear hardening</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Королев А.А. 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