Forming method of flat pipe fitting

Abstract

The invention relates to the technical field of pipe fitting forming, in particular to a forming method of a flat pipe fitting. The forming method comprises the following steps that A, edge rolling isconducted, wherein a plate is bent and rolled, the two ends of the plate are welded, and the plate forms a closed ring body through a welding seam; B, radial forming is conducted, wherein a mold corematched with the preset shape of the pipe fitting is added into the welded closed ring body, then the side wall of the pipe fitting is pressed to make the radial section of the pipe fitting achieve apreset shape, and the welding seam is made to avoid the inflection point position of the closed ring body on the radial section in the process; and C, axial forming is conducted, wherein after the radial section of the pipe fitting is formed, the front end and the rear end of the pipe fitting are cut correspondingly to make the pipe fitting achieve a preset shape in the axial direction. Accordingto the forming method, the plate is connected into the closed ring body through the welding seam, the grinding amount is greatly reduced, the mold core is added into the pipe fitting, the interior and the exterior of the pipe fitting are formed simultaneously, the problem of part springback is solved, the workload of manual shape correction is reduced, the pipe fitting forming effect is better, the quality guarantee of products is enhanced while the production efficiency is improved, and mass production of the flat pipe fitting is achieved.

Description

technical field [0001] The invention relates to the technical field of pipe fitting forming, in particular to a method for forming flat pipe fittings. Background technique [0002] There are many tubular parts in the parts of aviation and aerospace equipment, such as figure 1 and figure 2 As shown in FIG. 1 , it is a schematic structural view of a flat pipe fitting 1 , the cross section of which is a closed ring structure, and the left and right inflection points 101 and 102 are respectively arranged on both sides of the ring structure. [0003] For this type of flat pipe fittings, the traditional process can be roughly divided into two categories, one is to form the whole by multiple stretching, this method can ensure the size of the profile, but the wall thickness of the part will also be increased due to multiple stretching Excessive thinning; the other is the combination of welding and forming. Two half-pipes are formed from two sheets, and the two sides are respectiv...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for forming flat pipe fittings in view of the problems of excessive grinding and low pass rate of parts in the forming process of flat pipe fittings in the prior art. This method uses a welding seam to connect the plates into The closed ring body greatly reduces the amount of grinding. The mold core is added inside the pipe fittings, and the inside and outside are formed at the same time, which solves the problem of part springback, reduces the workload of manual shape correction, makes the pipe fittings more effective, and improves production efficiency. It also strengthens the quality assurance of products and realizes the mass production of flat pipe fittings

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