SU1255249A1 - Method of producing annular blanks - Google Patents

Description

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The invention relates to the processing of metals by pressure, in particular to the stamping of ring blanks.

The aim of the invention is to improve the quality of the blanks by increasing their accuracy, as well as improving the productivity of the process.

FIG. Figure 1 shows a scheme for manufacturing an annular billet from round steel at the initial moment of deformation; Figure 2 is the same, top view, with the upper part of the stamp removed; on the diagram of the production of the ring blank at the final stage of deformation; 4 is the same, top view with the upper part of the stamp removed.

The method is carried out as follows.

The pre-bent round rolled billet 1 is placed in a cocentric container of a shaped maritse 2, which is rotated around its axis (Fig. 1).

The workpiece 1 is placed in matrices with a gap S in the outer diameter at the places of under-bending and mismatch of the ends of the workpiece formed in the previous operation, since the end bending operation was not performed (Fig. 1a), then the workpiece I together with the rotating matrix 2 is fed up (the drives do not shown) until it touches a conical obtuse angle punch 3, the angle at the apex of which is 180 ° - 2f. The end part of the punch 3 is made in the shape of the profiled blank, for example, in the form of a sphere. The axis of the punch is inclined from the axis Bpanie-Yi matrix: 2 at an angle T,

The punch 3 is rotatably mounted around its own axis. With a further rise, the ends of the ring blank 1 are docked by plastic deformation. as a result of joint running in the punch 3 along its diametral end face in the die 2, with the inner diameter limited by the profile end part of the punch and the concentric profile limited by the outer diameter.

Docking the ends of the workpiece occurs as a result of elongation of the original workpiece due to rolling.

The elongation in this case occurs along the radius of the relief of the matrix, and when the internal fibers dock, a ring is.

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This workpiece joins the outer fibers as a result of plastic deformation. At the same time, the profile of the cut ring stock 1 is being formed at the same time.

After the load has been removed and the die 2 is returned to its initial position, the runner annular workpiece 1 is removed by the ejector 4. As a result of plastic deformation, the joint of the workpiece and the outer diameter of the rolled workpiece remain unchanged during removal.

Example. A spherical hinge ring is manufactured. The ring billet is a circle of 12.5 mm, steel 45. The billet is subjected to bending into a ring in two transitions and, after bending, has the dimensions: diameter in a plane perpendicular to the plane passing through the junction of the 77 mm ends; diameter at the junction of the ends of 82 mm; the gap between the ends of the workpiece 10 mm. The blank is placed in a matrix container having a diameter of 83-0.07 mm, i.e. clearance of 3 mm. The die is mounted in a rolling installation which is placed on a plate of a hydraulic press and is provided with a rotating drive. The punch is attached to the slide and is rotatably mounted. The axis of the punch is inclined to the axis of rotation of the matrix at an angle of 2 °. At the end of the punch there is a conic surface with a cone angle of 180 ° - 2 jf and 176 °; in addition, the punch is provided with a spherical shank for forming a ring profile. When the slider is brought in and the matrix is rotated, the deformations of the workpiece are rolled. The run cycle is 3 seconds. After running in the ends, the workpieces close butt. The density of the joint is indicated by the filling with a metal at the junction of the matrix form.

The proposed method is intended for tightly joining the ends of the workpiece without springing from a pre-bent annular workpiece, which, under certain product designs, can be bypassed without subsequent welding. At the same time, the ends of the workpiece are joined simultaneously due to plastic deformation of the profile of the ring blank and redistribution of the metal as a result of running in.

FIG. 2

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Editor G. Volkova

FIG.

Compiled by I.Lanska Tehred M.Hodanich.

Order 4747/10 Circulation 783 Subscription

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, ul, Proektna, 4

Corrector t.Kolb

Claims (2)

1. METHOD OF MANUFACTURE RING Billets, including bending the workpiece into a ring with bending the ends by rolling, joining the ends and connecting them, characterized in that, in order to improve the quality of the workpieces by increasing their accuracy, as well as increasing productivity, the connection is made by plastic deformation of the ends of the workpiece on a sphere-movable press with radial external and internal supports. 2. The method according to claim 1, characterized by the fact that simultaneously with plastic deformation, the surface of the workpiece is profiled. _about SS Fg / g. 1 1 12 5 .: