RU2014106287A - METHOD FOR MANUFACTURING RECTANGULAR WELDED PIPES OF A LARGE DIAMETER - Google Patents

METHOD FOR MANUFACTURING RECTANGULAR WELDED PIPES OF A LARGE DIAMETER Download PDF

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RU2014106287A
RU2014106287A RU2014106287/02A RU2014106287A RU2014106287A RU 2014106287 A RU2014106287 A RU 2014106287A RU 2014106287/02 A RU2014106287/02 A RU 2014106287/02A RU 2014106287 A RU2014106287 A RU 2014106287A RU 2014106287 A RU2014106287 A RU 2014106287A
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radius
lower roll
profile
pipe
large diameter
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RU2014106287/02A
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Russian (ru)
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RU2571298C2 (en
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Сергей Геннадьевич Четвериков
Дмитрий Борисович Фрункин
Алексей Сергеевич Христофоров
Руслан Владимирович Урядов
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Открытое акционерное общество "Волжский трубный завод"
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Abstract

1. Способ изготовления прямошовных сварных труб большого диаметра, включающий сборку и сварку технологического шва, отличающийся тем, что центральную часть профиля кромок догибают после формовки.2. Способ по п.1, отличающийся тем, что в качестве инструмента применяются ролики с однорадиусным профилем рабочих поверхностей, профили которых рассчитаны по формулам:,где R - радиус нижнего валка;D - номинальный наружный диаметр трубы;s - номинальная толщина стенки трубы;φ - коэффициент распружинения;где r - радиус верхнего ролика;R - радиус нижнего валка;s - номинальная толщина стенки трубы;b - технологический зазор;,где Δ - горизонтальное смещение центра кривизны профиля рабочей поверхности нижнего валка;R - радиус нижнего валка;h - отличное от ноля требуемое значение стрелы перегиба кромок, необходимое для компенсации сварочных деформаций.1. A method of manufacturing longitudinal welded pipes of large diameter, including the assembly and welding of the technological seam, characterized in that the Central part of the profile of the edges bend after molding. 2. The method according to claim 1, characterized in that the tool uses rollers with a single-radius profile of the working surfaces, the profiles of which are calculated by the formulas: where R is the radius of the lower roll; D is the nominal outer diameter of the pipe; s is the nominal thickness of the pipe wall; φ is the coefficient of springing; where r is the radius of the upper roller; R is the radius of the lower roll; s is the nominal thickness of the pipe wall; b is the technological gap; where Δ is the horizontal displacement of the center of curvature of the profile of the working surface of the lower roll; R is the radius of the lower roll; h - other than zero the required value of the edge kink arrow necessary to compensate for welding deformations.

Claims (2)

1. Способ изготовления прямошовных сварных труб большого диаметра, включающий сборку и сварку технологического шва, отличающийся тем, что центральную часть профиля кромок догибают после формовки.1. A method of manufacturing longitudinal welded pipes of large diameter, including the assembly and welding of the technological seam, characterized in that the Central part of the profile of the edges bend after molding. 2. Способ по п.1, отличающийся тем, что в качестве инструмента применяются ролики с однорадиусным профилем рабочих поверхностей, профили которых рассчитаны по формулам:2. The method according to claim 1, characterized in that the tool uses rollers with a single-radius profile of the working surfaces, the profiles of which are calculated by the formulas:
Figure 00000001
,
Figure 00000001
, где R - радиус нижнего валка;where R is the radius of the lower roll; D - номинальный наружный диаметр трубы;D is the nominal outer diameter of the pipe; s - номинальная толщина стенки трубы;s is the nominal wall thickness of the pipe; φ - коэффициент распружинения;φ is the coefficient of displacement;
Figure 00000002
Figure 00000002
 где r - радиус верхнего ролика;where r is the radius of the upper roller; R - радиус нижнего валка;R is the radius of the lower roll; s - номинальная толщина стенки трубы;s is the nominal wall thickness of the pipe; b - технологический зазор;b - technological gap;
Figure 00000003
,
Figure 00000003
, где Δ - горизонтальное смещение центра кривизны профиля рабочей поверхности нижнего валка;where Δ is the horizontal offset of the center of curvature of the profile of the working surface of the lower roll; R - радиус нижнего валка;R is the radius of the lower roll; h - отличное от ноля требуемое значение стрелы перегиба кромок, необходимое для компенсации сварочных деформаций. h - non-zero required value of the edge bending arrow, necessary to compensate for welding deformations.
RU2014106287/02A 2014-02-19 2014-02-19 Method of producing large-diameter longitudinal welded pipes RU2571298C2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2702666C1 (en) * 2018-07-25 2019-10-09 Маргарит Арменовна Товмасян Method of large-diameter pipes step molding
RU2756090C1 (en) * 2020-11-26 2021-09-27 Дмитрий Борисович Фрункин Method for producing large-diameter longitudinal welded pipes
RU2763696C1 (en) * 2021-05-31 2021-12-30 Акционерное общество "Выксунский металлургический завод" (АО "ВМЗ") Method for manufacturing longitudinal electric-welded pipes

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Publication number Priority date Publication date Assignee Title
US389991A (en) * 1888-09-25 Stake and socket for flat cars
SU707642A1 (en) * 1977-03-05 1980-01-05 Предприятие П/Я Г-4361 Method of making welded straight-seam tubes
RU2100115C1 (en) * 1996-04-02 1997-12-27 Акционерное общество открытого типа "УралЛУКтрубмаш" Welded tube production method

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