SU1230718A1 - Apparatus for rolling annular grooves in pipes - Google Patents

Description

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The invention relates to the processing of metals by pressure, in particular to the tooling for the manufacture of corrugated pipes.

The purpose of the invention is to reduce the labor intensity of manufacturing the matrix ring.

FIG. 1 shows the device; a cross-section j in FIG. 2 is a view A of FIG. one.

The device comprises a housing 1 installed in a bearing 2, and a drive for rotating the housing. In the annular groove of the housing 1 a matrix ring 3 is installed, which is installed with friction engagement with the ends and the outer surface with the walls and bottom 4 of the housing groove. A finger 5 is mounted on the end face of the ring 3; it engages with a clamp 6, which has a surface 7 parallel to one of the longitudinal axial planes of the housing 1, and a surface 8 inclined relative to the surface 7 towards the finger 5 at an obtuse angle. The latch 6 is installed with the possibility of its radial movement to the axis of the housing 1.

The matrix ring 3 has a forming rib 9, made in the plane normal to the axis of the ring 3, and has a Kiese surface of the body of rotation. The outer contour of the ring 3 is made in the section BV along the diverging spiral (working section), in the section VG - along the arc of a circle of radius R (calibrating section) and in the section GB - along the converging spiral. The bottom 4 of the groove of the housing 1 is made in the form of a cylinder of rotation with the same radius R as the section VG of the ring 3.

The device also includes a mandrel 10 of any design on which the billet tube 11 is mounted.

The device works as follows.

The housing 1 rotates in the direction shown by the arrow (Fig. 2).

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The latch 6 is removed by radial movement from engagement with the finger 5. and the ring 3 is entrained due to the friction forces of the rotary shaft between the workpiece 11 installed on the mandrel 10 and the cylindrical bottom 4 of the housing 1. BV occurs clamping outside the 0 contour surface of the ring 3

to the bottom 4 of the groove of the housing 1 and forming-. edge 9 to the workpiece. Due to this, press the outer contour of the ring 3 rolls along the bottom 4 of the groove of the housing 1 from point B to point B. At the same time, the forming edge receives a transverse movement in the direction of the workpiece 11 and rolls neither. her groove. With

contacting the site with the bottom of the SH 4

The 20 grooves of the housing 1, the ring 3 rotates together with the housing 1 as one piece, calibrating the groove. During the time of knurling and calibration of the groove, the latch is returned to the initial position (Fig. 2). At the end of the complete rotation of the ring 3, due to its narrowing in the section GB, the ring 3 moves away from the workpiece, and the finger 5 slides along the surface 8 of the retainer 6 until it stops in

30 surface 7. Due to this, the ring 3 is pressed from the workpiece and the forming rib 9 is led out of the groove. This completes the processing cycle of a single canadian.

35 To process the next groove, the workpiece is shifted by a tag in the axial direction, and the cycle is repeated.

The use of the proposed construction allows, in comparison with protopicm, to significantly simplify the manufacture of the matrix ring, to manufacture it on universal equipment. It is easier to ensure the required high quality and accuracy of the surface of the forming rib. By reducing the cost of manufacture and repair of rings, a significant economic effect can be obtained.

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Editor T. Mitejko

Order 2478/13 Circulation 783 Subscription

VNISh of the USSR State Committee for Inventions and Discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

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I - ..

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

FIG. 2

Compiled by M. Lastochkina

Tehred M. Khodanych Proof-reader I. Erdeyi

Claims (1)

DEVICE FOR ROLLING RING grooves ON TUBES, containing a mandrel and a matrix ring with a forming rib made in a plane normal to the axis of the matrix ring, containing a working section made in the form of a spiral, and a calibrating section made in the form of a constant radius curve, which differs the fact that, in order to reduce the complexity of manufacturing the matrix ring, the forming rib is made cylindrical, and the working and calibrating sections are made on the outer surface of the matrix ring, while the device is equipped with a housing installed with the possibility of rotation and frictional interaction with the outer surface of the matrix ring, a latch mounted with the possibility of radial movement, and a finger located on the end surface of the matrix ring with the possibility of interaction with the latch. 0Λ. 1