SU1579626A1 - Method of producing forings of disks - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular, to methods for producing disk forgings. The purpose of the invention is to reduce the labor intensity and economy of the metal by bringing the disk forging contour closer to the circle. Hollow billet is subjected to sediment to a height of L = 2√2R @ + @ 2, where R is the radius of the disk, @ is the allowance for the radius of the disk. The pre-formed billet is crimped over the entire length to obtain diametrically located grooves of depth H = H 1-H, where H 1 is the wall thickness of the workpiece, H is the thickness of the disk forgings. Then the workpiece is deformed between two dies with separation into two workpieces and subjected to straightening. The method makes it possible to reduce the laboriousness of making discs and the consumption of metal. 6 Il.

Description

The invention relates to the processing of metals by pressure, in particular, to methods for producing disk forgings.

The purpose of the invention is to reduce the labor intensity and economy of the metal by bringing the disk forging contour closer to the circle.

FIG. 1 shows the floor of the workpiece after precipitation of its size, mounted on the mandrel; in fig. 2 - scheme of compression of the workpiece with the receipt of grooves on the outer surface; in fig. 3 is a schematic drawing and rolling of a hollow billet with notches; in fig. 4 - the same, side view; in fig. 5 - straightening-straightening scheme with the division of the halves; in fig. 6 is a diagram of the precipitation of a hollow billet to a height L

The method is carried out as follows.

Hollow billet 1 precipitated to a height

 V2R (5+ (52, where R is the radius of the disk;

d - allowance along the disk radius.

Then, the workpiece 1 is mounted on the mandrel 2 (Fig. 1) and crimped by narrow strikers 3 and 4 until the recess 5 is obtained on the workpiece 1 with a wall thickness h equal to the thickness of the disk forging (Fig. 2). In this case, the magnitude of the insertion H of the strikers 3 and 4 into the workpiece 1 is defined as the difference between the wall thickness Hi and the thickness of the disk forgings h. those. H Ht-h (Fig. 2).

The blank 1 is pulled and rolled out to form a shell 6 (Figs. 3 and 4). In this case, the deformation of the workpiece 1 ensures the equality of areas in the areas of sections I - III and IV - VI, respectively, during drawing and rolling (sections I - 111 and IV - VI are in diametrical planes). The resulting shell 6 is a blank for two discs, at the joints, where the area of the longitudinal section of the wall is minimal and without taking into account the allowance for the radius of the disc tends to zero. To withstand the specified conditions, the operation of stretching and rolling can be alternated

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vat repeatedly. The resulting shell 6 is subjected to flattening with bending in two places with a minimum length along the generators and subsequent leveling between the strikers 7 and 8 (FIG. 5) with repeated bending of the metal of the flattened forgings of the discs, at which they are split without using the cutting operation. After straightening the flat forging of the disk, the last one in the plan is a figure close to the circle. Possible local precipitation of the hollow billet 1 to a value in the same plane (Fig. 6), in which the strikers 3 and 4 move when receiving the notches 5.

PRI me R. On a hydraulic press with a force of 120 MN, they were applied on a mandrel with a diameter of 1400 mm and a cylindrical shell of steel 15 x 2NM1FA with a maximum length of 5950 mm and a minimum of 1850 mm was rolled on a 1200 mm mandrel. The outer diameter of the shell is equal to 3950 mm, internal 3500 mm. The shell is obtained from an annular billet, which, before stretching and rolling, was compressed in oppositely located areas along the forming and end faces in a diametrically cutting plane. The angle at the top of the crimping dies 90 °. The inner diameter of the ring billet 1500 mm, outer 3150 mm. The height of the ring-billet at the greatest generatrix of 1600 mm, at the smallest generatrix of 600 mm. The resulting shell edged in the bending-correct stamp.

five

In this case, the half-sheaves were separated from one another by the smallest generators. Before straightening inside the shell, asbestos sheets were installed to prevent seizure. After straightening to separate the halves, the forgings were cylindrical discs with a diameter of 5800 mm, which did not go beyond the limits of forging allowances.

The application of the method makes it possible to reduce the labor intensity by eliminating the cutting of forgings to obtain discs and to increase the cost-effectiveness of manufacturing by eliminating metal waste generated after cutting the forgings.

Claims (1)

The invention The method for the manufacture of disk forgings, including the draft of a hollow billet, its stretching, rolling, scanning and separating, characterized in that, in order to reduce labor intensity and save metal, the draft is deposited to a height of L 2 V2 Rd + g. where R is the radius of the disk $ - allowance along the radius of the disk, and before drawing an additional compression of the workpiece is carried out along its entire length to obtain dimples with depth H Hi - h, symmetrically located in the diametral plane, where Hi is the wall thickness of the workpiece after precipitation, h is the thickness of the disk forging. 1 3 FIG. 2 / U / 7 ////////////////// Л , / S, t / ,,, (xV x ///, //// rL (- J / s ,,,. S. S / S s / s s s s s L / ////////////////// Л Fig.Z 5 FIG. four ///////// Л FIG. 6