SU899309A1

SU899309A1 - Shells welding method

Info

Publication number: SU899309A1
Application number: SU802952995A
Authority: SU
Inventors: Александр Борисович Гончаров; Самуил Мордкович Гуревич; Владимир Васильевич Кундик; Владимир Петрович Кушнирук; Владимир Дмитриевич Матвеев; Михаил Минович Нероденко; Евгений Павлович Полищук; Владимир Иванович Федулов
Original assignee: Ордена Ленина И Ордена Трудового Красного Знамени Институт Электросварки Им. Е.О. Патона
Priority date: 1980-06-16
Filing date: 1980-06-16
Publication date: 1982-01-23

Description

Изобретение относитс к области сварки, iiB частности к способу сварки обечаек может быть использовано дл сварки плавлением обечаек большого диаметра э листовых заготовок в химическом, автомо Й1льиом других отрасл х машинострое1В{ .The invention relates to the field of welding, iiB in particular, to a method of welding shells can be used for fusion welding of shells of large diameter e sheet blanks in a chemical, automatized other machine-building industry.

Наиболее близким но технической сущности к предлагаемому вл етс состав сва{жи обечаек, при котором обечайку собирают, по крайней мере, из двух ; стовых заготовсж и выполн ют сз рку продольных стыков. Стыки сваривают последователмо сщт за другим ГПОсновным недостатком известного способа вл етс больша длительность продасса, обусловленна пооюреднЫ сваркЫ стыков.The closest but technical essence to the present invention is the composition of the pile {of the shells, in which the shell is collected from at least two; One hundred and half procurements and perform longitudinal seams. The joints are welded sequentially, after another GPO. The main disadvantage of the known method is the long duration of the transasse due to the welded joints.

Кроме того, недостатком вл етс также значительное деформирование обечайки под действием сварошых напр жений, что также вызвано поочередной сваркой стыков.In addition, a disadvantage is also a significant deformation of the shell under the action of welded stresses, which is also caused by the alternate welding of the joints.

Цель изобретени - уменьшение остаточных сварочных деформаций полученной обечайки и повышение гцкдазводительности процесса сварки.The purpose of the invention is to reduce the residual welding deformations of the resulting shell and increase the welding productivity.

1Тоставленна «ель достигаетс сот-ласно способу сва{жи обечаек, преимущественно диаметра и малой прот женности, 1 котором обечайку собирают, по крайней мере, нз двух листовых заготовок и вьшол- ; н ют сварку продольных .стыков, тестовые заготовки собирают с переменными от О до (0,1-0,2)0 , где о - толщина тктовой ; заготовки, по длине стыка 3a3opavni и измен ют направление расхождени зазора на противоположное иа каждом последующем . стыке, а сварку всех стыков вытогаопот одновременно , начина ее на каждом стыке со стороны больи1его .1The supplied spruce is achieved hundreds of ways to pile {shells, mainly of diameter and small extent, 1 of which the sheath is assembled, at least, from two sheet blanks and out-; welding of longitudinal joints, dough blanks are assembled with variables from O to (0.1-0.2) 0, where O is the thickness of this; billets, along the length of the 3a3opavni junction and change the direction of the gap divergence to the opposite and each subsequent. the joint, and welding all the joints at the same time, starting it at each joint from the side.

На фиг. 1 схематиздю представлена свариваема обечайка; на фиг. 2 - то же, вид Сверху на фиг. 1; на фиг. 3 - то же, вод сбоку на фнг. 1.FIG. 1 shows a welded shell; in fig. 2 is the same, top view in FIG. one; in fig. 3 - the same water on the side of the fng. one.

Способ реализуетс следуюишм .The method is implemented as follows.

Claims

Sheet blanks are collected in the conductor so that there is a gap (0,1-O, 2) of thickness L1k from one storotl between the edges; The gap Bemnma in the specified range is determined by the maximum allowable gap to prevent the weld pool from breaking by the surface tension forces when welding without an additive. The edges of the blanks are fixed in an adaptation of a known structure to prevent the gap width from changing during the welding process under the action of welding stresses. At each successive joint, the direction of the divergence of the edges is reversed, this allows reducing welding deformations and partially compensating for their influence by simultaneously welding all the joints in opposite directions. Welding is performed non-melting with a tungsten electrode in an inert environment; foot gas. The presence of a variable gap allows to reduce the residual welding stresses in the seam. Welding from the side of a large gap allows, without increasing residual stresses and deformations, divergence of the edges of the joint during the welding process. The deformation of the shell during the alignment process is mutually compensated by simultaneously welding all joints in opposite directions. Example. Welding of shells with a diameter of 1100 mm. The shell is assembled in a conductor of six 1 mm thick molybdenum sheet blanks. The edges of the blanks on the one hand set with a gap of 0.15 mm. The direction of divergence of the edges at each subsequent junction is reversed. Welding is performed in a chamber in a controlled atmosphere with gels with non-melting tungsten electrode of all seams at the same time. The welding conditions are 117A, U and 15B, VCB 14 m / h. The maximum dielectric strength of the shell is 0.8 mm. Thus, by simultaneously welding all the joints and setting the edges of the blanks with the specified gap, labor productivity is increased by speeding up the welding process and the deformation of the shells is reduced. The method of the invention is welding (and shells, mainly of large diameter and small length, in which the sheath is collected, at least from two sheet blanks, and longitudinal welding is performed, characterized in that, in order to reduce the residual welding deformations of the obtained sheath and increase the productivity of the welding process, sheet blanks are assembled; they are variable from 0 to (0.1-0.2), where eG is the thickness of the sheet billet, gaps along the joint length and change the direction of the gap divergence to the opposite by Each subsequent joint, and welding all the joints at the same time, starting it at each joint from a larger gap. Sources of information taken into account during the examination I. USSR author's certificate N 435085, class B 23 K 37/04 ,. 1967 (prototype).

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