Shaping of thick sheet in the production of welded large-diameter pipe

Osadchii, V. Ya.; Gaas, E. A.; Zvonarev, D. Yu.; Kolikov, A. P.

doi:10.3103/s0967091214050088

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…(4) The simulation results show that there is a limit to the relative spacing of punch W max for the pipe with certain geometrical dimensions and mechanical properties; based on this, the other process parameters are further determined. (5) The contour detection method based on the CCD camera can be used to detect the forming status of single pass, and the contour splicing method is proposed at the same time to obtain the overall contour of the formed part. These new methods take less time and have higher accuracy than previous detection methods.…”

Section: Discussionmentioning

confidence: 99%

“…On this basis, Fu et al [4] proposed a mathematical punch design method to obtain the desire springback radius based on dimensional analysis. Osadchii et al [5] built a model to calculate the relationship between the punch reduction and springback radius of pipe based on the FEM (finite element method). However, both of the above methods just consider one process parameter and ignore the other process parameters that also have a great influence on bending result.…”

Section: Introductionmentioning

confidence: 99%

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Research on Four-Point Air Bending Process and Contour Detection Method for JCO Forming Process of LSAW Pipes

Zhi-yuan

Wang

et al. 2019

Metals

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Aiming at the forming efficiency and roundness of the longitudinal submerged arc welded (LSAW) pipes in JCO (J-shape to C-shape to O-shape) forming process, this paper proposes a four-point air bending process. Compared with the traditional three-point air bending process, The new process can provide a more uniform bending moment, does not need to crimp the edges of steel sheet, shorten the residual straight segment length, and lengthen the forming length in single pass. The mechanical model is established to analyze the static equilibrium conditions and elastic–plastic deformation. The process is simulated by using the software package ABAQUS, to find the maximum punch spacing, and further determine the formulation principles of other process parameters. In addition, a contour detection method for the LSAW pipes in forming process is proposed based on machine vision (planar-array CCD camera produced by Gray Point Corporation, Vancouver, Canada). This method can not only quickly detect the contour of each pass, but also splice the detected contours together to obtain the overall contour with the given splicing algorithm. According to the measured contour, the bending angle, radius, and roundness can be calculated, to correct the punch reduction in the next pass and improve the forming accuracy of the pipes. Finally, an experimental system is designed to verify the proposed four-point bending JCO forming process and contour detection method. The result shows that the error between the contour detection method and CMM (coordinate measuring machine) is less than 0.5% for the overall contour, the two experimental pipes require 13 and 15 passes respectively, the roundness of pipes are less than 1.1%, which is much better than that of traditional three-point bending JCO forming process.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on Four-Point Air Bending Process and Contour Detection Method for JCO Forming Process of LSAW Pipes

Zhi-yuan

Wang

et al. 2019

Metals

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“…В работах [13,14] представлена разработанная авторами математическая модель (с применением метода конечных элементов) формоизменения металла на кромкогибочном прессе, а также алгоритм расчета глубины опускания пуансона, по величине которого проверяется высота подгибки кромок Н кф после распружинивания. Это что позволяет определить, обеспечивается ли при данной калибровке инструмента и настройке кромкогибочного пресса необходимый профиль для последующего формоизменения трубной заготовки на прессе шаговой формовки.…”

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Mathematical Model of Plastic Forming of the Slab for Large Diameter Welded Pipes. Report 1

Kolikov¹,

Звонарев²,

Таупек³

et al. 2016

Izv. vysš. učebn. zaved., Čern. metall.

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2 ОАО «Российский научно-исследовательский институт трубной промышленности «РосНИТи» (454139, Россия, Челябинск, ул. Новороссийская, 30) 3 Старооскольский технологический институт им. А.А. Угарова, филиал НИТУ «МИСиС» (309516, Россия, Белгородская обл., Старый Оскол, микрорайон Макаренко, 42) Аннотация. Представлен анализ качества сварных труб большого диаметра в зависимости от параметров и режимов формовки листовой заготовки на прессовом оборудовании. Выполнено математическое моделирование процессов с применением метода конечных элементов и представлены результаты напряженно-деформированного состояния метала при формовке трубной заготовки в прессовом оборудовании. Созданная программа для ЭВМ позволяет проводить расчет технологических параметров настройки прессового оборудования и определять величины контролируемых геометрических параметров трубной заготовки, предъявляемых в нормативных документах. Теоретические решения проверены экспериментально на сортаменте труб большого диаметра, выпускаемых на ТЭСА 1420. Данную методику рекомендовано применять для расчета параметров формовки ТБД и режимов настройки прессового оборудования, обеспечивающих уменьшение количества дефектов, вызванных геометрией прессового инструмента кромкогибочного пресса и пресса шаговой формовки. Ключевые слова: сварные трубы большого диаметра, формовка кромки, листовая трубная заготовка, кромкогибочный пресс, пресс шаговой формовки, глубина опускания пуансона, калибровка прессового инструмента.

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Development of Effective Roll-Pass Designs for Production of Longitudinally Welded Pipes of Small and Medium Diameters

2020

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Shaping of thick sheet in the production of welded large-diameter pipe

Cited by 8 publications

References 4 publications

Research on Four-Point Air Bending Process and Contour Detection Method for JCO Forming Process of LSAW Pipes

Research on Four-Point Air Bending Process and Contour Detection Method for JCO Forming Process of LSAW Pipes

Mathematical Model of Plastic Forming of the Slab for Large Diameter Welded Pipes. Report 1

Development of Effective Roll-Pass Designs for Production of Longitudinally Welded Pipes of Small and Medium Diameters

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