RU1811428C - Method of making necking portions of gas bottles - Google Patents

Abstract

Usage: metal forming. SUMMARY OF THE INVENTION: The run-in is carried out in stages by two non-driven rollers: in the first step, the first roller is used to form a section of the spherical part of the neck and the cone, which generates which is tangent to the spherical part of the neck in the cone. At the second stage, the outer surface of the cone is shaped by the second roller in the continuation of the spherical part of the neck and the cylindrical part of the neck. The second step is carried out without changing the inner surface of the workpiece and without axial support. 3 ill.

Description

The invention relates to the processing of metals by pressure and can be used in the manufacture of gas cylinders.

The aim of the invention is to improve product quality.

Figure 1 shows the initial position; figure 2 - the first stage of the running; in Fig.Z - second run-in stage.

PRI me R. According to the proposed method, throats with a diameter of a cylindrical part of 46 mm were obtained on workpieces with an inner diameter of 240 mm with a wall thickness of 5 and 6 mm from 38KhNZMFA steel. The billet was heated in an inductor to a temperature of 1200 ° C. Then it was transported to the spindle of the sunset rig, clamped, and rotated at 600 rpm. The deformation was carried out by two non-uniform rollers. The first roller, whose diameter was 400 mm, formed a section of the spherical part of the neck length of 70 degrees. In this case, the roller moved with speed

1.5 deg / s. The molding was carried out with the formation of a cone at the end of the preform, and its forming one being tangent to the generatrix of the spherical part of the neck at the transition point of the formed portion of the spherical part of the neck into the cone. A second roller, the diameter of which was 450 mm, was reformed into a continuation of the spherical part of the neck and the cylindrical part of the neck. The speed of the second roller was 3 mm / s. In the process of cone reforming, the profile of the inner surface of the preform was not changed. Reforming was carried out without axial support of the front end of the workpiece. No captures were found on the outer surface of the product, and microcracks on the inner surface.

Using the proposed method in the production of cylinders will reduce the marriage on the outer and inner surfaces of m. 10%.

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Claims (1)

SUMMARY OF THE INVENTION A method for manufacturing the necks of gas cylinders, comprising stage-by-stage rolling of the heated end of a rotating tubular billet, first with one and then other non-driven rollers, wherein the working of the billet with a second roller is carried out without changing the geometry of its inner surface, characterized in that that at the first stage, the first roller is used to form the portion of the spherical part of the neck and the cone, the generatrix of which is tangent to the generatrix of the spherical part of the neck at the transition point of the formed portion of the spherical part the neck into a cone, a. in the second stage, the second surface of the cone is shaped with a second roller to extend the spherical part of the neck and the cylindrical part of the neck, the second the step is carried out without axial support.