SU1355339A1 - Method of moulding flanges on hollow cylindrical part - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to methods for producing flanges on pipes. The purpose of the invention is the expansion of technological capabilities by forming flanges on a hollow cylindrical part with a radial flow of metal mainly in one direction. The workpiece is installed in the matrix with the mandrel and deform the part of the workpiece protruding from the matrix in two transitions. On the first transition, depending on the direction in which the flow of metal is to be intensified — outward or inward, the protruding part of the workpiece is shaped into a truncated cone, respectively, by distribution or crimping. At the second transition, it is upset with a flat punch. In both cases, the resulting outer and inner flanges have different widths at their same height. The method reduces the laboriousness of obtaining parts with flanges and the metal consumption by 1.3 times. 2 3.p. f-ly, 4 ill. since he built the JV with & 0 with

Description

The invention relates to the processing of metals by pressure, in particular, to methods for producing flanges on pipes.

The aim of the invention is the expansion of technological capabilities by forming flanges on a hollow cylindrical part with a radial flow of metal, mainly in one direction.

Figure 1 shows the crimping part of the billet installed in the matrix with the mandrel; figure 2 - compression of the protruding part of the workpiece flat punch; on fig.Z - distribution of part of the billet; figure 4 - the reduction of the protruding part of the workpiece flat punch.

The method is carried out as follows.

A hollow cylindrical billet 1 is installed in a die 2 with a mandrel 3 and the part of the workpiece projecting from the matrix is deformed into two transitions, and depending on what kind of flange (external or internal) is needed to be obtained, on the first transition, a punch 4 gives the projecting part corresponding frustoconical shape. For a preferential set of metal in the inner flange, the protruding part of the preform is compressed, and the diametral dimensions of the truncated cone become smaller than the corresponding initial diametral dimensions of the preform. If it is necessary to provide a preferential set of metal in the outer flange, the projecting part of the workpiece is distributed, obtaining a truncated cone, which has diametrical dimensions larger than the corresponding diametral dimensions of the blank.

Then, at the second transition, the conical part of the workpiece protruding from the matrix is deposited with a flat punch 5 until the required flange sizes are obtained. In both cases, the resulting outer and inner flanges have different widths at their same height.

The aspect ratio of the upset part of the workpiece is as follows: the height of the protruding part of the workpiece does not exceed the thickness of the machines more than 25 times, the wall thickness is not less than 0.1D, where D is the outer diameter of the workpiece, the angle of inclination of the truncated cone forming, to the vertical axis

varies from O to 90 without compromising the quality of the parts produced.

Example. Experimental stamping of parts with inner and outer flanges of tube blanks made of aluminum of the АД1 brand and lead with an inner diameter of 32 mm, outer diameter was carried out.

40 mm and a length of 45 mm, the height of the protruding part of the workpiece 10 mm.

On the first transition, by dispensing or crimping the protruding part of the blanks, the shape of a truncated cone was given, the cones being equal to 10 and 15, and then on the second transition, the deformed part of the blank was upset by a flat punch. The billets made of aluminum, which at the first transition were subjected to distribution by a punch having a Konube angle of 10 °, after the second transition had an outer flange diameter of 54.4 mm, and an inner flange diameter of 25.5 mm, their height was

equal to 2.5 mm. A billet of the same material, which at the first transition were crimped by a punch having a cone angle of 15, pic

1 rii4t:; iuuj j.i i, A 4JJJ. i.j a l

The second transition had an outer flange diameter of 48.5 mm, an inner flange diameter of 8.6 mm with a flange height of 2.5 mm.

The use of the invention allows to reduce the complexity of obtaining parts with flanges and their cost, and in addition, to reduce the consumption of metal by 1.3 times.

Claims (3)

1. A method of forming flanges on a plate of a cylindrical part by installing a pipe billet in a matrix with a mandrel and deforming it from the part protruding from the matrix, so that it is, in order to expand technological capabilities by forming flanges on a hollow the cylindrical part has a radial flow of metal predominantly in one direction, the billet is deformed in two transitions, and at the first transition the projecting part of the billet is given the shape of a hollow truncated cone, and at the second transition it is flattened nson 2. Method pop.1, different from the fact that the hollow truncated cone at the first transition is obtained by crimping the protruding part of the workpiece. 31355339 3. The POP.1 method, the difference between the cone at the first transition is obtained with the fact that the hollow truncated by distribution of the projecting part of the workpiece, phi5.1 FIG. 2 sriaz cfjusA Editor T. Parfenova Compiled by V. Bukharev Tehred L. Oliinyk Order 5741/10 Circulation 583 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader O. Kravtsov