SU1207572A1 - Method of joining a tube with a flange - Google Patents

Description

The invention relates to the field of mechanical engineering and can be used in all industrial sectors for the manufacture of pipes and hollow shafts with flanges.

The purpose of the invention is to provide a sealed connection of pipes.

FIG. 1 and 2 are sketches of technological transitions for the manufacture of a pipe with a flange.

The method of manufacturing a pipe with a flange is carried out as follows. .:

A flat flange is made by any method, for example, by hot stamping in open dies. The hole in flange 2 is made smaller than the internal diameter of pipe 1. Then the flange is deformed plastically at the end, the angle of taper of which is determined experimentally on the basis of the elastic-plastic properties of the pipe materials. and flange. On the butt

The conical flange surface is filled with a concentric groove 3, the outer diameter Dp of which is equal to the outer diameter of the pipe Dy, the inner diameter dcp is equal to the inner diameter of the pipe dr, and the depth of the groove h is not less than the wall thickness of the pipe b and not more than two thirds of the thickness of the flange S.

The pipe 1 is installed in the concentric groove 3 on the flange 2. Then, during the flanging process due to the deformation of the profile of the groove, the end of the pipe 4 is distributed and a tight connection between the pipe and the flange is provided by compressing the pipe end on both the external and internal surfaces.

The technical and economic effect of using the proposed method consists in providing a tight connection between the pipe and the flange.

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with/;

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Editor O. Kolesnikova

Compiled by I.Kapitonov

Tehred A BOYKO Proofreader l. Pilipenko

Order 92/9 Circulation 783 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch of CPP Patent, Hzhhorod, Proektna St., 4

Claims (1)

PIPE JOINT METHOD With a FLANGE, including the manufacture of a flange, its plastic deformation on a cone, the installation of a conical flange on the pipe seating surface with a large base towards the pipe and the subsequent connection of the pipe end distribution with simultaneous straightening of the flange, characterized in that, in order to obtain a tight connection, on the end before the installation of the convex surface of the conical flange on the pipe seating surface, an annular groove is made, the axis of which coincides with the pipe axis, the outer and inner diameters are respectively the outer and inner diameters of the pipe, and the depth is not less than the wall thickness of the pipe and not more than 2/3 of the thickness of the flange, while the distribution of the end of the pipe is carried out in the process of straightening the flange.