RU197152U1 - Device for distributing pipe lugs - Google Patents

Abstract

The utility model relates to the processing of metals by pressure and can be used in the distribution of lugs for pipes used for the construction of oil pipelines. A device for distributing pipe lugs comprises a mandrel with a conical head. The mandrel is made with a hole with an axis installed in it, which serves as a sliding support for the mandrel during distribution. A ring is mounted on the axis. The lower thrust sleeve, which is the guide for the pipe lug, is coaxially mounted on the ring. The upper thrust sleeve is installed on the lower thrust sleeve, abutting against the ends of the pipe end and the liner mounted on the tube end. A puller is installed in the lower thrust sleeve, threaded to the axis, which regulates the length of the distributed section of the tip for pipes and serves as a support for the upper thrust sleeve. The result is an increase in the degree of deformation of the tips for pipes without destroying them and the expansion of the technological capabilities of forming tips for pipes. 2 ill.

Description

The utility model relates to the processing of metals by pressure and can be used in the distribution of lugs for pipes used for the construction of oil pipelines.

A device for distributing pipe ends (patent SU No. 1581433, IPC B21D 41/02, publ. 07/30/1990, bull. No. 28), containing a drive rod with a conical tip, on which there is an expanding collet. The collet is inserted into a pre-fixed pipe and with the help of a drive rod with a conical tip it is opened. As a result, the end portion of the pipe is deformed to form a cone-shaped back-bell. Further movement of the rod leads to the movement of the expanded collet relative to the stationary pipe and to its deformation with the receipt of a cylindrical socket.

A disadvantage of the known device is the relatively low marginal distribution of the end section of the pipe due to the possible destruction of the workpiece under the action of the tensile stresses.

The closest in technical essence is a device for mechanical distribution of pipes (patent SU No. 389869, IPC B21D 41/02, publ. 12/11/1973, bull. No. 30), containing a mandrel moving along the pipe with a conical head and acting on installed inside pipes with the ability to radially move segments. When moving the mandrel inside the pipe, the segments diverge and distribute the pipe.

The disadvantage of this device is the possibility of destruction of the workpiece with small degrees of distribution of the pipe due to the unfavorable loading pattern with circumferential tensile stresses.

The technical objectives of the proposed device are to increase the degree of deformation of the tips for pipes without destroying them, as well as expanding the technological capabilities of forming tips for pipes.

The technical problems are solved by a device for distributing pipe tips containing a mandrel with a conical head acting on the parts installed inside the pipe nozzle, characterized in that the mandrel is provided with an aperture with an axis installed in it, which serves as a support for sliding the mandrel during distribution, a ring is installed on the axis, on which the lower stop sleeve is coaxially mounted, which is a guide for the pipe end, with the upper stop sleeve mounted on it, abutting against the ends of the pipe end and liner, Formation at the tip tube, the bottom retaining sleeve mounted puller coupled thread with an axis and regulates the dispensed length of the tip portion for pipes, as well as serving to support the upper thrust bushing.

In FIG. 1 shows a device for dispensing pipe lugs prior to a dispensing process.

In FIG. 2 shows a device for dispensing pipe lugs after a dispensing process.

A device for distributing tips for pipes (Fig. 1) includes a mandrel 1 with a conical head. The mandrel 1 is equipped with an opening with an axis 2 installed in it, which serves as a sliding support for the mandrel 1 during distribution. A ring 3 is mounted on the axis 2. A lower thrust sleeve 4, which is a guide for the pipe end, is coaxially mounted on the ring 3. The upper thrust sleeve 5 is installed on the lower thrust sleeve 4, abutting against the ends of the nozzle for pipes 6 and the liner 7 mounted on the tip for pipes 6. In the lower thrust sleeve 4 there is a puller 8 connected by a thread to the axis 2 and adjusting the length of the tip for pipes 6, as well as serving as a support for the upper thrust sleeve 5.

A device for distributing tips for pipes works as follows.

On the tip for pipes 6 install the liner 7 (Fig. 2) and served on the table of the calibration machine, lubricated with grease. Then the mandrel 1 is installed in the calibration device of the machine (not shown in Fig. 2). An axis 2 is installed in the mandrel hole, then a ring 3 is installed on the axis 2. A lower thrust sleeve 4 is installed on the ring 3. pipes 6 and the liner 7. The puller 8 is connected by a thread with the axis 2 and rest against the table 9 of the calibration machine. The rotation of the puller 8 along the thread of the axis 2 allows you to adjust the length of the distributed section of the tip for pipes 6. Then the tip for pipes 6 with the insert 7 is clamped by the grips of the calibration machine (not shown in Fig. 2).

To obtain the necessary indicators for the distribution of the tip for pipes 6, for example, the angle of distribution is 15 °, the length of the section being distributed is 15 mm, the inner initial diameter of the section to be distributed is 57 mm, the inner final diameter of the section to be distributed is 65 mm, the mandrel 1 exerts a force P calibration machine.

The necessary effort for the distribution of the tip for pipes 6 is determined by the formula:

P = (m⋅s) / ((D _n -d _c ) ⋅π⋅cosα⋅L),

where m is the mass of the tip;

s - feed device calibration machine;

D _n - the outer diameter of the tip;

d _in - the inner diameter of the tip;

α is the angle of distribution of the tip;

L is the length of the distributed portion of the tip.

The mandrel 1 freely slides along axis 2 and presses on the ring 3 and the lower thrust sleeve 4. The lower thrust sleeve 4 moves all the way to the end surface of the puller 8. The upper thrust sleeve 5, under the action of force P, for example, 011MPa, presses on the puller 8, which serves as a fixed support. Under the action of the force from the upper thrust sleeve 5, the pipe tip 6 with the liner 7 moves without resistance along the lower thrust sleeve 4 to the mandrel 1, forming the necessary distribution profile.

After check the necessary distribution parameters for compliance with the drawing. Then release the tip for the pipes 6 with the liner 7 from the grips of the calibration machine.

The technical objectives of the proposed device are to increase the degree of deformation of the tips for pipes without destroying them, as well as expanding the technological capabilities of forming tips for pipes.

The device for distributing pipe lugs is manufactured using high-precision CNC turning equipment. For the manufacture of the device, structural alloy steel 40X and structural carbon steel of high quality 20 were used. The device is used in the manufacture of ferrules for pipes MPT-K with a diameter of up to 273 mm.

Claims (1)

A device for distributing pipe lugs containing a mandrel with a conical head, characterized in that the mandrel is made with a hole with an axis installed in it, which serves as a sliding support for the mandrel when distributing, while a ring is mounted on said axis on which the lower thrust sleeve is coaxially mounted, which is a guide for the pipe end, with the upper thrust sleeve installed on it, abutting against the ends of the tube end and the liner mounted on the tube end, with the lower stop sleeve installed a puller is connected, connected by a thread with an axis, which regulates the length of the distributed section of the tip for pipes and serves as a support for the upper thrust sleeve.

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