Автоматизированное проектирование технологических настроек листоправильной машины
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Дата
2017
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПИ"
Анотація
Рассмотрена методика определения параметров процесса правки листов, особенностью которой является учёт изгиба рабочих роликов и его влияние на исправление дефекта волнистости. Методика основана на совместном использовании инженерной и регрессионной моделей, полученных в результате реализации конечно-элементной модели правки волнистости листов. Данный подход позволяет снизить время расчета настроек листоправильной машины. Получены оптимальные значения коэффициента проникновения пластической деформации, настроек машины, а также величины изгиба рабочего ролика для достижения регламентируемой стандартами волнистости листов.
Ключевые слова: толстолистовой металлопрокат, правка, напряженно-деформированное состояние, математическое моделирование,
качество, листоправильная машина.
The paper considers the method of determining the parameters of the sheets leveling, a distinguishing feature of which is the inclusion of a working roll bending and its impact on the correction of the defect waviness. The method is based on the joint use of an engineering model levelling the curvature of sheets and descriptions of regression resulting from the implementation of the finite element model changes waviness. This approach reduces the calculation time settings leveler. Optimum values of the coefficient of plastic deformation penetration, leveler settings, as well as the value of the bending of the working roller to achieve the standards regulated waviness of the sheets were obtained. From the analysis of the obtained dependences it can be concluded that the band waviness decreases with increasing bending and overlapping of the rollers. The calculations show that with a large waviness of the order of 60 mm / m, a single curvature of the rollers achieves the required undulation of the edges (A <8 mm / m) is not possible. The most significant factor here is the decrease in the parameter W / h to a level of 0.25, which is achieved, as a rule, by a third roller and is limited by the normalized coefficient of plastic deformation penetration. However, it is sufficient to bend a single roller in the majority of cases to ensure the quality normalized by the corrugation of the sheets, and for sheets 4 ... 14 mm thick with a width of 1000 ... 2000 mm, the amount of curvature required for straightening the edge curvature of the rollers does not exceed 2.0 mm.
The paper considers the method of determining the parameters of the sheets leveling, a distinguishing feature of which is the inclusion of a working roll bending and its impact on the correction of the defect waviness. The method is based on the joint use of an engineering model levelling the curvature of sheets and descriptions of regression resulting from the implementation of the finite element model changes waviness. This approach reduces the calculation time settings leveler. Optimum values of the coefficient of plastic deformation penetration, leveler settings, as well as the value of the bending of the working roller to achieve the standards regulated waviness of the sheets were obtained. From the analysis of the obtained dependences it can be concluded that the band waviness decreases with increasing bending and overlapping of the rollers. The calculations show that with a large waviness of the order of 60 mm / m, a single curvature of the rollers achieves the required undulation of the edges (A <8 mm / m) is not possible. The most significant factor here is the decrease in the parameter W / h to a level of 0.25, which is achieved, as a rule, by a third roller and is limited by the normalized coefficient of plastic deformation penetration. However, it is sufficient to bend a single roller in the majority of cases to ensure the quality normalized by the corrugation of the sheets, and for sheets 4 ... 14 mm thick with a width of 1000 ... 2000 mm, the amount of curvature required for straightening the edge curvature of the rollers does not exceed 2.0 mm.
Опис
Ключові слова
толстолистовой металлопрокат, качество, напряженно-деформированное состояние, математическое моделирование, thick plate, stress-strain state, mathematical modeling, quality
Бібліографічний опис
Грибков Э. П. Автоматизированное проектирование технологических настроек листоправильной машины / Э. П. Грибков, Е. Ю. Гаврильченко // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Інноваційні технології та обладнання обробки матеріалів у машинобудуванні та металургії = Bulletin of National Technical University "KhPI" : coll. sci. papers. Ser. : Innovative technologies and equipment handling materials in mechanical engineering and metallurgy. – Харків : НТУ "ХПІ", 2017. – № 37 (1259). – С. 11-16.