SU1248696A1 - Apparatus for manufacturing articles having annular corrugations from round billets - Google Patents

Description

The invention relates to the processing of metals by pressure and can be used for the manufacture of pipes with an Al-corrugation, for example, hoses, compensators, by mechanical shaping.

The purpose of the invention is to improve the quality of products.

Figure 1 shows the device, transverse section; in fig. 2 shows a section —A in FIG. Figures 3 to 7 show the sequence of deformation of the tubular billet.

The device contains a housing 1 mounted in a fixed base 2. A mandrel 3 is rigidly connected to the housing 1. In the radial grooves of the housing 1 and the mandrel 3, four and five grooves are installed in pairs, the transverse grooves of which interact with eccentrics 6 and 7 of the return-drive drive. translational movement of punches. In the axial direction, the punches 4 are bounded by half rings 8 mounted on the housing 1 with the possibility of opening and closing (the drive for moving the half-rings 8 is not shown), and the plug 5 is provided with a clamp 9 attached to the mandrel 3.

In addition, the device comprises a cartridge comprising a body 10, a permissible ring 11 and a stem 12, designed to clamp the billet pipe 13 to axially move and rotate it. The pairs of punches 4 and 5 are distributed in neighborhoods with an angular pitch L associated with the dimensions of the punches 5 and eccentrics 7.

The working surfaces of each pair of punches 4 and 5 have a mating surface of rotation at an angle f and smoothly change in the circumferential direction from pair to pair.

Eccentricities of eccentrics 6 and 7 are assigned based on the depth of penetration of the punches into the workpiece and the free exit of the molded 3 parts when the punches open and may not be the same for the internal and external punches.

The device works as follows.

In the initial position, all pois1-ge are located in the extreme designated positions, half rings 8 are open.

486962

The workpiece pipe 13 is clamped using the ring I and the stem 12 in the housing 10 and moving the housing 10 completely to the right, inside the housing 1

5 on the mandrel 3,

The first corrugation is formed without closure of the half-rings 8, all subsequent ones with closed half-rings 8, basing the blank 13 on the depression of each last formed corrugation. Each corrugation is molded in the following sequence.

Rotation of the first pair of eccentrics creates a reciprocating movement of the corresponding pair of punches with simultaneous circumferential flow of the billet tube 13. The circumferential flow is performed by turning the body 10 by an angle smaller than the angle

20 each cycle of action punches. After turning the workpiece through 360, this pair of punches is shut off and the second pair is put into operation, then the next, and so on. In this case, the punches consequently deform the blank, as shown in FIG. 3-7.

Upon completion of the forming of the corrugations, all the punches stop at the designated positions, after which the half rings 8

30 is opened, the workpiece is moved

. body 10 left one step, then

semiring 8 again with nJI-hayc, similarly described, the next corrugation is formed. 35 The number of pairs of punches is assigned based on the required height of the corrugation of the product and the allowable deformation of the workpiece of each pair of punches. Future linear sections

40 corrugations remain straight-line throughout the process, as shown in Figures 3-7.

 Test tubes with annular corrugation, 45 manufactured on the proposed device, showed that low-cycle. strength increases by an average of 6-10%. Such an increase in durability is explained by the fact that the corrugated pipes molded on the proposed device, the stock of plastic properties of the material of the corrugation wall is greater than that of the pipes formed by the existing technological 55 KIM processes.

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Compiled by L.Tkachenko Tehred O.Gortvay

Cor Pod

Circulation 783 VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, st. Project, 4

7

Proofreader I.Musk Subscription

Claims (1)

DEVICE FOR MANUFACTURING PRODUCTS WITH RING CORDS FROM TUBULAR Billets, containing external and internal punches with working surfaces profiled in the form of sections of bodies of revolution, mounted in grooves of the respective holders in pairs in radial planes, reciprocating reciprocating onward movement of punches, including placed in the grooves of the punches, and the drive for moving the workpiece, which is characterized by the fact that, in order to improve the quality of products, the contours of the profiled surface of the neighboring punches are made smoothly changing in the circumferential direction, the movable elements of the drive of the reciprocating oncoming movement of the punches are made in the form of eccentrics installed with the possibility of independent rotation, and the drive for moving the workpiece is equipped with a mechanism for its periodic rotation. FIG. t 1,248,696 A f