RU2795327C1 - Device and method for processing internal surface of steeply bent pipeline and machined branch - Google Patents

Abstract

FIELD: metal processing.

SUBSTANCE: devices and methods for processing the inner surface of a steeply curved pipe bend, for example, for turning by cutting, as well as machined bends, i.e. bends with a machined inner surface. A device for processing the inner surface of a steeply curved pipeline branch, containing a base located on a turntable. The turntable is rotatably positioned on the support table. Console extending from the base and made curved. The headstock for the spindle shaft is fixed on the free end of the console and is configured to accommodate the spindle shaft. Spindle shaft located in the headstock with the possibility of rotation. Machining tool holder mounted on the spindle shaft. Clamping means fixed on the support table with the possibility of installing a guide support and a machined branch. The headstock is made with the possibility of moving in the cavity of the installed guide support and in the cavity of the installed machined outlet when turning the turntable with the base mounted on it with the console and holding the axis of the spindle shaft in a position tangential to the circle centered on the axis of rotation of the turntable and with a radius equal to the radius curvature of the axial line of the processed branch, measured from the center on the axis of rotation of the turntable. A processing method and an outlet with a machined inner surface.

EFFECT: ensuring high accuracy and cleanliness of processing of the inner surface of a steeply curved branch of the pipeline when using the present device and implementing the present method.

12 cl, 14 dwg

Description

The field of technology to which the invention belongs

The present invention generally relates to the processing of metal products, in particular, to devices and methods for processing the inner surface of a curved pipe bend, for example, for turning by cutting, as well as machined bends, i.e. bends with a machined inner surface.

State of the art

Solving various technical problems and designing new devices may require high dimensional accuracy of metal products and ensuring a given surface finish. For example, in order to achieve a given size of the inner diameter of a bent pipe bend with the required accuracy and the required surface finish in the devices for moving the ball piston in the calibrated section of the pipe piston calibration unit (TPU), which can be used in systems for calibrating fluid flow measuring instruments at oil and gas producing, oil and gas processing and oil transportation or other businesses.

Various devices and methods for cleaning pipelines are known in the prior art. A significant part of the known devices do not provide for the possibility of cleaning or processing sharply bent, curved pipelines. Some of the known devices are suitable for cleaning and treating the outer surfaces of pipelines having rounded surfaces.

For example, a device is known for cleaning the inner surface of a pipeline according to USSR author's certificate No. 1602590 (IPK B08B 9/055, publ. 10/30/1990), in which a brush is coaxially placed in the form of a cable in the middle and spherical elastic sealing cuffs along the edges. Due to the flexibility of the cable, the device passes steeply curved sections of the pipeline. However, the disadvantage of the known device is the method of its application by moving along the pipeline by the flow of the medium, which is not suitable for use in the problems of turning pipe bends with open ends.

Decisions on patents of the Russian Federation for utility models No. 19780 (IPK B08B 9/04, publ. 10.10.2001) and No. 26976 (IPK B08B 9/04, publ. 01.10.2003) are also characterized by flexible connections between elements, which allows them to be used for cleaning of steeply curved pipelines, but not for machining the bends of such pipelines.

There are also several solutions that describe devices for servo processing of the internal surfaces of pipelines, for example, those described in the USSR author's certificate No. 1424983 (MPK B23B 29/034, publ. 09/23/1988) and in the RF patent for invention No. 2288807 (MPK B23B 1/00 , B23B 35/00, published 12/10/2006). However, the design of the known devices is quite complex and metal-intensive, which does not allow their use in devices for turning bends of steeply curved pipelines of relatively small diameter.

The closest analogue of the present technical solution, chosen as a prototype, is a device for cleaning the inner surface of a pipeline with curved turns, described in the RF patent for the invention No. 2136401 (MPK B08B 9/04, publ. pipe, muffled from the extreme end in the direction of movement of the device and perforated in the middle. At the ends, at a distance of ≈1.5 D _tr from each other, spheres with a tightening element passed through from the inside are fixed. A cylindrical body with a flat bottom and a cleaning element at the end is mounted on one of the spheres with the possibility of angular movement and thrust perception. Moreover, the cleaning element is removed from the center of the sphere and the removal is directed against the direction of movement.

During the operation of the known device for its movement, the traction force arises due to the pressure difference before and after the cuff: before - the pressure of the working agent, with which the pipeline is cleaned and the device is moved, and after - the pressure of the medium in the cavity of the pipeline in front of the device is usually equal to atmospheric. Accordingly, the use of the known device for processing non-closed (open at one or both ends) pipelines and their branches is not possible.

Disclosure of invention

Despite the advances in the state of the art, it is still an urgent task to develop a more advanced device and method for processing the inner surface of a steeply curved pipe bend.

To eliminate the shortcomings of the prior art, the present invention proposes a device for processing the inner surface of a steeply curved pipe bend, containing:

a base positioned on the turntable, the turntable being rotatably positioned on the support table;

a console extending from the base and made curved;

headstock for the spindle shaft, fixed on the free end of the console and made with the possibility of accommodating the spindle shaft,

spindle shaft located in the headstock with the possibility of rotation;

a processing tool holder mounted on the spindle shaft;

clamping means fixed on the support table with the possibility of installing a guide support and a branch to be processed;

at the same time, the headstock is configured to move in the cavity of the installed guide support and in the cavity of the installed processed outlet when turning the turntable with the base mounted on it with the console, and the headstock is configured to hold the axis of the spindle shaft in a position tangential to the circle centered on the axis of rotation turntable and a radius equal to the radius of curvature of the axial line of the processed branch, measured from the center on the axis of rotation of the turntable.

In one of the variants, a device is proposed, containing a gear motor, made with the possibility of transmitting rotation to the spindle shaft by means of a flexible shaft, and the electric motor of the gear motor is made with numerical control.

In one embodiment, a device is proposed in which at least four clamping means are provided, two of which are intended for mounting a guide support, and the other two are designed for mounting a branch to be processed, each clamping means comprising a stand and two clamps located on the rack of the clamping means , and the stand and the rack of the clamping means are rigidly fixed on the support table.

In one embodiment, a device is proposed in which at least two groups of guide rollers are provided, and the headstock for the spindle shaft is provided with one of at least two groups of guide rollers.

In one embodiment, a device is proposed in which the remaining of at least two groups of guide rollers are located on the console.

In one embodiment, a device is proposed in which each of at least two groups of guide rollers contains at least three rollers, and the rollers are spring-loaded.

In one embodiment, a device is proposed in which the curvature of the console essentially corresponds to the curvature of the axial line of the branch being processed.

In one of the variants, a device is proposed, in which the radius of curvature of the guide support is equal to the radius of curvature of the branch to be processed, and the inner diameter of the guide support is equal to the internal diameter of the branch to be processed.

In one of the variants, a device is proposed, in which the processing tool is a cutter for turning the inner surface of the branch to be processed.

In one additional aspect, a method is provided for treating the inner surface of a curved pipe bend, comprising the steps of:

install in the device described above the guide support and the machined outlet by means of clamping means so that the spindle shaft is located with its axis tangent to the circle centered on the axis of rotation of the turntable and with a radius equal to the radius of curvature of the axial line of the machined outlet, measured from the center on the axis of rotation turntable;

turning the turntable with the base and inserting the headstock with the spindle shaft and the processing tool holder placed on it into the cavity of the guide support;

fixing the processing tool in the processing tool holder;

cause the spindle shaft to rotate;

the rotary table with the base is rotated and the inner surface of the steeply curved pipeline branch is processed.

In one further aspect, a conduit elbow is provided, the inner surface of which has been machined by means of the apparatus of the first aspect of the invention or by the method of the second aspect of the invention. Preferably, the curved pipe bend includes at least one flange at the free end of the bend.

The technical problem solved by the creation of the present invention is to create a device and a corresponding method for processing the inner surface of a curved bend of the pipeline, for example, for turning by cutting, which will provide a given size of the inner diameter of the curved bend of the pipeline with the required accuracy and the required surface finish.

The present invention provides a technical result, which consists in ensuring high accuracy and cleanliness of the processing of the inner surface of the curved bend of the pipeline when using the present device and/or when implementing the present method.

The specified technical result is ensured due to the fact that the device for processing the inner surface of the curved bend of the pipeline has the design described above, while the headstock is configured to move in the cavity of the installed guide support and in the cavity of the installed processed bend when turning the turntable with the base mounted on it with the console, moreover, the headstock is configured to hold the axis of the spindle shaft in a position tangential to a circle with a center on the axis of rotation of the turntable and a radius equal to the radius of curvature of the axial line of the branch being machined, measured from the center on the axis of rotation of the turntable.

Through the use of this device in the implementation of the present method of processing the inner surface of a curved bend of the pipeline, a guide support and a machined bend are installed in the device by means of clamping means so that the spindle shaft is located with its axis tangential to the circle centered on the axis of rotation of the turntable and with a radius equal to the radius curvature of the axial line of the processed branch, measured from the center on the axis of rotation of the turntable. This ensures the achievement of high accuracy and cleanliness of the processing of the inner surface of the curved bend of the pipeline.

The device itself, due to its design, is characterized by increased reliability, ease of use, the possibility of performing various operations for machining the inner surface of steeply curved pipe bends with different wall thicknesses of various diameters and sizes.

The technical result achieved and other advantages of the present invention are disclosed in detail in the following description. It is to be understood, however, that the drawings and description are, by nature, to be considered illustrative and not restrictive.

Brief description of the drawings

The present invention is illustrated in the figures of the drawings, in which:

in fig. 1 is a general view of the device of the present invention;

in fig. 2 - section A-A in Fig. 1, showing the end position of the headstock after machining a steeply curved pipe bend;

in fig. 3 is a sectional view similar to that of FIG. 2 showing in more detail a headstock position suitable for mounting a machining tool in one embodiment of the invention;

in fig. 4 - place I according to FIG. 3, which shows in more detail the headstock provided with guide rollers and the spindle shaft with the machining tool installed;

in fig. 5 is view B of FIG. 4 showing in more detail the guide rollers provided with the headstock for the spindle shaft;

in fig. 6 is a section E-E of FIG. 5 showing a sectional view of the guide roller support in more detail;

in fig. 7 - view D in Fig. 4 showing in more detail the processing tool holder;

in fig. 8 - section D-D according to FIG. 7 showing in more detail the attachment of the processing tool holder;

in fig. 9 - place II according to FIG. 3 showing in more detail the attachment of the guide roller to the console;

in fig. 10 - section B-B in Fig. 3 showing in more detail the attachment of the guide rollers to the console;

in fig. 11 - section W-W in Fig. 2 (rotated) showing in more detail the fastener with the guide post installed;

in fig. 12 - section I-I of FIG. 3 (rotated) showing in more detail the fastening means with the machined outlet in place;

in fig. 13 - steeply curved bends of the pipeline with a machined inner surface;

in fig. 14 - a steeply curved branch of the pipeline with a machined inner surface, containing flanges.

Description of preferred embodiments of the invention

The present invention generally relates to the processing of materials, in particular, to devices and methods for processing the inner surface of a curved pipeline bend, for example, for turning by cutting, as well as machined bends, i.e. bends with a machined inner surface.

Elements mentioned in the description in the singular do not exclude the plurality of elements, unless otherwise specifically indicated.

Further, continuing as a whole with reference to figures 1-13, a device for processing the inner surface of a curved pipe bend is proposed, comprising: a base 1 located on a turntable 2, and the turntable is located with the possibility of rotation on the support table 3 - welding table); console 15, continuing from the base 1 and made curved; a headstock 16 for the spindle shaft fixed on the free end of the console 15 and configured to accommodate the spindle shaft 24, the spindle shaft 24 located in the headstock 16 for rotation; a processing tool holder 32 mounted on the spindle shaft 24; clamping means 5, 6, 9, 10 fixed on the support table 3 with the possibility of installing the guide support 4 and the branch to be processed 13; while the headstock 16 is configured to move in the cavity 20 of the installed guide support 4 and in the cavity 21 of the installed processed outlet 13 when turning the turntable 2 with the base 1 mounted on it with the console 15, and the headstock 16 is configured to hold the axis 25 of the spindle shaft 24 in position tangentially 26 to the circle 27 centered on the axis 29 of rotation of the turntable 2 and radius R1 equal to the radius R of curvature of the axial line 28 of the machined branch 13, measured from the center on the axis 29 of rotation of the turntable 2.

Thanks to the present invention, a technical problem is solved, consisting in the creation of a device and a corresponding method for processing the inner surface of a curved bend of the pipeline, for example, for turning by cutting, which will provide a given size of the inner diameter of the curved bend of the pipeline with the required accuracy and the required surface finish.

In one embodiment, an apparatus is provided comprising a geared motor 94 capable of transmitting rotation to a spindle shaft 24 via a flexible shaft 95, wherein the electric motor 98 of the geared motor 94 is numerically controlled (CNC). It should be understood that the rotation control of the spindle shaft 24 may be performed by an external device not installed in the surface treatment device. Preferably, the turntable 2 also has a computer numerical control (CNC) motor to control its rotation, as will be described in more detail below.

In the preferred embodiment, as best seen in FIG. 3, the device contains a bracket 17, which is rigidly connected to the sole 89 of the base 1. The sole 89 is made in the form of a spindle head with the possibility of installation and fastening with bolts 90 on the faceplate (not shown) of the turntable 2. An outrigger plate 92 with a bracket is rigidly attached to the sole 89 17 and a square 93 for the gear motor 94. The gear motor 94 transmits torque to the spindle shaft 24 through a flexible shaft 95, which has low bending stiffness and high torsional rigidity, and connects the gear motor 94 with the spindle shaft 24 through the coupling 96 and coupling 97. The electric motor 98 is provided with a drive infrastructure including a CNC electrical unit, for example, a control device 14 that can be mounted on a support table 3. The connection between the control device 14 and the electric motor 98 is wired, and it may be possible to remotely control wired control panel or by transmitting control commands wirelessly to the control device 14 .

In one of the options, a device is proposed in which at least four clamping means 5, 6, 9, 10 are provided (best seen in Fig. 1, 11, 12), two 5, 6 of which are designed to install the guide support 4, and the other two 9, 10 are designed to receive the processing branch 13, and each clamping means includes a stand 7, 8, 11, 12 and two clamps 104, 105, 110, 111, 112, 113 located on the stand of the clamping means (such as the stand 102 of the clamping means 5), and the stand and the rack of the clamping means are rigidly fixed on the support table 3.

In the preferred embodiment, as best seen in FIG. 1 and 11, the clamping means 5, 6 includes a stand 7, 8 for positioning (resting on it) a guide support 4. The stand 7 is provided with a support platform 99, a screw 100 and a base 101, through which the stand 7 is rigidly fixed to the support table 3. In as a rigid connection, a connection by welding is meant, but other options for a rigid connection can be provided, for example, a bolted connection that provides the same reliable fastening of the base 101 of the stand 7 to the support table 3, but provides the ability to move the base 101 of the stand 7 to a different position of the support table 3 (for example, such as a perforated assembly and welding table) for the convenience of performing the necessary technological operations and / or processing a pipeline branch of a different diameter.

By rotating the screw 100, it is possible to vertically move the support platform 99 to adjust the installation position of the guide support 4 in height. The clamping means 5 comprises a post 102 rigidly connected to the base 103, by means of which the clamping means 5 is rigidly fixed to the support table 3. As described above, a rigid connection is meant to be a connection by welding, but other variants of a rigid connection can be provided, for example , a bolted connection that provides the same reliable fastening of the base 103 of the rack 102 to the support table 3, but provides the ability to move the base 103 of the rack 102 to another position of the support table 3.

The clamping means 5 is provided with a side clamp 104 and an upper clamp 105 which ensure that the guide support 4 is properly positioned and fixed in the required position in the horizontal plane and in the vertical plane, respectively.

The construction of the clamping means 5, 6, 9 and 10 is similar to each other. Thus, the clamping means 9 provides a stand 11, the construction of which is similar to that of the stand 7 described above. In addition, the clamping means 9 is provided with a side clamp 110 and an upper clamp 112 fixed on the leg of the clamping means 9 and designed to ensure proper installation and fixation of the processed branch 13 in the desired position in the horizontal plane and in the vertical plane, respectively.

And although four clamping means have been described above, two of which allow fixing the guide support, and two - the processed outlet, it should be understood that the device of the present invention may contain more clamping means to ensure more accurate positioning of the guide bearing and the processed outlet, as well as for more reliable fixation, which will ensure even greater accuracy in the processing of a steeply bent pipe bend.

In one embodiment, a device is proposed in which at least two groups of guide rollers 37, 38, 39 and 56, 57, 58 are provided, and the headstock 16 for the spindle shaft is provided with one of at least two groups of guide rollers 37, 38, 39 In one embodiment, a device is proposed in which the remaining of at least two groups of guide rollers 56, 57, 58 are located on the console 15. In one embodiment, a device is proposed in which each of at least two groups of guide rollers contains at least at least three rollers, and the rollers are spring-loaded.

And although groups will be described below, containing three spring-loaded rollers, evenly distributed around the headstock 16 and console 15, respectively, it should be understood that they can be located in other positions, for example, two rollers opposite each other, and the third roller at an equal distance from said two clips, or at least one of the groups may include only two or four or more clips. In any case, the number and position of the rollers must ensure proper positioning of the headstock 16 in the guide support 4 and the bend 13 to be machined in order to ensure high accuracy in processing the inner surface of the curved bend of the pipeline.

In the preferred embodiment, as best seen in FIG. 4, 5, 6, in the grooves 34, 35 and 36 of the headstock 16, three spring-loaded guide rollers 37, 38 and 39 are fixed. hexagonal slider 43. The faces 44 and 45 of the slider 43 interact with the faces 46 and 47, made in the groove 34 of the headstock 16, and the faces 48 and 49 of the slider 43 interact with the faces of the clamping bar 52, rigidly fixed with screws 53 to the headstock 16, while sliding of the slider 43 under the action of the spring 54. The stroke of the slider 43 is limited by the shoulder 55, made at the end of the slider 43. The design of the spring-loaded guide rollers 38 and 39 is similar to the design of the roller 37.

In the preferred embodiment, as best seen in FIG. 3, 9, 10, the second group of spring-loaded guide rollers 56, 57 and 58 is fixed on the console 15. The spring-loaded guide roller 56 is prefabricated and consists of a roller 59 framed, for example, with a polyurethane edging 60 and fixed to the axle 61 with a nut 62. Roller 56 mounted on the axle 61 on the needle bearing 63. The axle 61 is rigidly fixed on the lever 64. The lever 64 is made with an eyelet 65 and through the axle 66 interacts with the bracket 67 of the support of the roller 56, fixed by means of the plate 68 on the console 15. The bracket 69 is fixed on the plate 68 with lug 70. In lug 65 of lever 64 and lug 70 of bracket 69, a tension spring 71 is installed, which ensures that the roller 56 is pressed against the inner surface 72 of the guide support 4. The stroke of the lever 64 is limited by the stop 73, fixed on the bracket 67 by bolts 74.

The design of the spring-loaded guide rollers 57 and 58 is similar to the design of the roller 56, with the bracket 75 supporting the roller 57 and the corresponding bracket with an eye for the extension spring are fixed on the sector 18 of the truncated cone of the console 15, and the bracket 78 supporting the roller 58 and the corresponding bracket with the eye for the extension spring fixed on the sector 19 of the truncated cone of the console 15. The roller 57 and the roller 58 are also pressed against the inner surface 72 of the guide support 4.

In one embodiment, a device is proposed in which the curvature of the console 15 essentially corresponds to the curvature of the axial line of the branch 13 being processed. support 4 is equal to the inner diameter d of the processed branch 13.

As best seen in FIG. 2, 3, the console 15 through two groups of spring-loaded guide rollers 37, 38, 39 and 56, 57, 58 interacts with the guide support 4 and the processed outlet 13.

The console 15 is made in the form of a steeply curved horn, similar in curvature to the processed branch 13, and consists of two sectors 18 and 19 rigidly connected at an angle of 90 degrees truncated cones. The headstock 16 attached to the console 15 is movable in the cavity 20 of the guide support 4 and in the cavity 21 of the outlet 13. The guide support 4 is made and selected in such a way that the radius R1 of curvature of the axial line of the guide support 4 is equal to the radius R, where the radius R is the radius curvature of the axial line 28 of the machined outlet 13. The inner diameter d1 of the guide support 4 is equal to the inner diameter d of the machined outlet 13. Preferably, the guide support 4 is made in the form of a sector of the outlet with an angle θ1 between the planes of the ends of the sector, providing placement in the cavity 20 of the guide outlet 4 of the headstock 16 with spring-loaded guide rollers 37, 38 and 39 and a group of spring-loaded guide rollers 56, 57 and 58 mounted on the console 15 (as best seen in Fig. 2 and 3).

In this case, the size of the branch to be processed is determined by the angle Θ between the planes of the ends of the branch. The angular size of the console is 15, i.e. the size of the angle limited by the beginning of the console at the base 1 and the free end of the console at the place of attachment of the headstock 16, with the center on the axis 29 of rotation of the turntable 2 must exceed the sum of the angles Θ and Θ1. It is preferable to provide a small distance between the guide support 4 and the machined branch 13 when they are installed to allow maintenance of the headstock, spindle shaft and machining tool. If it is necessary to process a large bend (with a large angular dimension, angle Θ), the guide support can be selected with a smaller size (with a smaller angular dimension, angle Θ1). At the same time, reliable fastening of the guide support itself and accurate positioning of the console and headstock in the cavity of the guide support must still be ensured.

In one of the variants, a device is proposed, in which the processing tool is a cutter for turning the inner surface of the branch to be processed.

In the preferred embodiment, as best seen in FIG. 4, 7, 8, in the headstock 16, a spindle shaft 24 is installed on bearings 22 and 23 and secured with a cover 30 and a nut 31 through the holder 32 of the cutter. The axis 25 of the spindle shaft 24 is aligned with the tangent 26 of the circle 27 of rotation of the base 1 with a radius R1 equal to the radius R, where R is the radius of curvature of the axial line 28 of the machined branch 13, relative to the axis of rotation 29 of the turntable 2.

The holder 32 of the cutter is mounted on the spindle shaft 24 by means of a spline connection 33. On the holder 32 of the cutter, a cutter 81 is fixed, made with a hexagonal slider 82. On the cutter 81, a cutting plate 84 is fixed with a clamp 83. The cutter 81 on the holder 32 of the cutter in the groove 85 is fixed by a clamping bar 86 bolts 87. The depth of cut when turning the inner surface of the outlet is regulated by bolt 88.

It should be understood that the proposed device can be used for other suitable operations for machining curved bends. And instead of the cutter 81, another suitable tool can be used, for example, for grinding, boring or marking.

Thus, the present invention has a number of technical advantages, which are listed below.

The base console is made in the form of a horn with a headstock for the spindle shaft with a cutter holder rigidly mounted on it, while the position of the axis of the spindle shaft in the headstock is aligned with the tangent circle of radius R1, where R1 is the radius of the circle of rotation of the spindle shaft axis relative to the axis of the turntable, and the radius R1 is equal to the radius R, where the radius R is the radius of curvature of the axial line of the workpiece being processed - a steeply curved branch of the pipeline. This design ensures that the axis of rotation of the cutter holder is aligned with the axial line of the retraction. When choosing the optimal cutting conditions, this ensures the fulfillment of the specified dimensions and quality of the surfaces of the workpieces, ensures the reliable operation of the device.

The installation of three spring-loaded guide rollers on the headstock ensures that the axis of the spindle shaft is fixed in a position tangential to the circle with a radius R1, which also ensures the fulfillment of the specified dimensions and quality of the surfaces of the workpieces.

The control of the spindle shaft by means of a CNC motor-reduced motor and a flexible shaft with low bending rigidity and high torsional rigidity ensures reliable operation of the device.

The presence of the second group of spring-loaded guide rollers and the fixation of the guide support on the support (mounting and welding) table by at least two clamping means ensures smooth movement of the base with the headstock fixed on the console in the cavity of the guide support, and smooth insertion of the tool holder into the cavity of the branch to be processed, which also ensures reliable operation of the device and high quality and accuracy of processing.

Fastening the guide support on the support (assembly-welding) table with at least two clamping devices provides mechanical rigidity of the entire structure of the device, which ensures reliable operation of the device as a whole.

The control of the spindle shaft with the cutter holder by means of a CNC motor-reducer ensures accurate positioning and feed of the cutter when turning the inner surface of the outlet, ensures the fulfillment of the specified dimensions and quality of the surfaces of the workpieces.

Installing a steeply curved pipe bend on a support (mounting and welding) table and fixing it with at least two clamping means, while ensuring that the axial line of the bend being processed is aligned with the continuation of the circle of rotation of the spindle shaft axis relative to the axis of the turntable, ensures the fulfillment of the specified dimensions and high quality of the surfaces of the workpieces .

In one of the additional aspects, a method is provided for treating the inner surface of a curved pipe bend by means of the described device, comprising the steps of:

the guide support 4 and the machined outlet 13 are installed in the device by means of clamping means 5, 6, 9, 10, so that the spindle shaft 24 is located with its axis 25 along the tangent 26 to the circle 27 centered on the axis 29 of rotation of the turntable 2 and radius R1 , equal to the radius R of curvature of the axial line 28 of the processed branch 13, measured from the center on the axis of rotation 29 of the turntable;

turn the turntable 2 with the base 1 and enter the headstock 16 placed on it the spindle shaft 24 and the holder 32 of the processing tool in the cavity 20 of the guide support 4;

fixing the processing tool 81 in the processing tool holder 32;

drive the spindle shaft 24 into rotation;

the turntable 2 with the base 1 is rotated and the inner surface of the steeply curved pipe bend is processed.

It should be understood that the proposed method of the present invention also provides a technical result, which consists in ensuring high accuracy and cleanliness of the processing of the inner surface of the curved bend of the pipeline. Below is a more detailed description of the method of the present invention.

Turning on from the portable control panel of the CNC electric motor of the rotary table 2 with the base 1 installed on it, the headstock 16 with the holder 32 of the processing tool is inserted into the cavity 20 of the guide support 4, for example, for the cutter 81. The headstock 16 is pre-fixed on the console 15 of the base 1, while cutter 81 on the holder 32 of the cutter is temporarily not installed. When the headstock 16 is inserted into the cavity 20 of the guide support 4, the spring-loaded guide rollers 37, 38 and 39 mounted on the headstock 16 are pressed against the inner surface 72 of the guide support 4.

With further rotation of the base 1 at the entrance to the guide support 4, the spring-loaded guide rollers 56, 57 and 58 mounted on the console 15 are pressed in and enter the cavity 20 of the guide support 4. Under the influence of the tension springs, the spring-loaded guide rollers 56, 57 and 58 are pressed against the inner surfaces 72 of the guide support 4 ensure the stability of the console 15 in the guide support 4.

By turning on the CNC motor-reducer 94 from the portable control panel, the spindle shaft 24 is rotated with the cutter holder 32 mounted on it. was outside the cavity 20 of the guide support 4, and the spring-loaded guide rollers 56, 57 and 58 and the spring-loaded guide rollers 37, 38 and 39 - in the cavity 20 of the guide support 4. From the portable control panel of the electric motor with CNC, the power supply to the device is turned off. The device for processing the inner surface of a steeply bent pipe bend is ready for operation.

Before installing the machining tool, it is recommended to carry out the steps at which the turntable 2 with the base 1 is rotated further and the free play of the headstock 16 with the spindle shaft 24 placed on it and the holder 32 of the machining tool in the cavity 21 of the processed branch 13 is checked; in the case of confirmation of the free play, turn the rotary table 2 in the opposite direction and return the headstock 16 with the spindle shaft 24 placed on it and the holder 32 of the processing tool to its original position (see, for example, Fig. 3).

The workpiece of the branch to be processed 13 is supplied for processing with marking marks applied on the surface of the branch in the vertical and horizontal planes of the section (risks 106, 107 are visible in Fig. 3, and risk 108 in Fig. 1). The points of intersection of the vertical and horizontal planes of the section with the end planes of the withdrawal are the beginning and end of the sector of the circle of the axial line of the workpiece. The workpiece of the processed branch 13 on the stands 11 and 12 of the clamping means 9 and 10 is set so that the distance between the adjacent ends of the guide support 4 and the processed branch 13 is 80-150 mm, which is necessary for installing the cutter 81 in the holder 32 of the cutter and its maintenance (Fig. .3).

Installation of the outlet 13 is carried out by moving the pads of the supports 11 and 12 in the vertical plane and the side clamps 110 and 111 in the horizontal plane until the circumference of the axial line of the processed outlet 13 is aligned with the circle 27 of rotation of the turntable 2 and the base 1 with the holder 32 of the cutter and the spindle shaft 24 relative to the axis 29 rotation of the turntable 2. The outlet 13 is fixed with the upper clamps 112 and 113 after checking the free passage of the console 15 of the base 1 with the holder 32 of the cutter in the cavity 21 of the outlet 13 (Fig. 2). Remove the base 1 with the holder 32 of the cutter in its original position (Fig. 3).

Depending on the size and condition of the inner surface of the branch to be machined 13, cutting modes and materials of the cutting tool - cutting plate 84 are set. On the cutter 81, the cutting plate 84 is fixed with a clamp 83. The cutter 81 is installed in the holder 32 of the machining tool. The cutter 81 is fixed on the holder 32 of the machining tool clamping bar 86 with bolts 87. The depth of cut when turning the inner surface of the outlet is regulated by means of bolt 88.

Turning on the CNC electric motor 98 from the portable control panel of the geared motor 94 rotates the holder 32 with the cutter 81. Turning the rotary table 2 from the portable control panel of the CNC electric motor rotates it and feeds the tool into the cavity 21 of the processed outlet 13. The number of passes is set by the cutting mode until the specified size and quality of the inner surface of the outlet 13 is reached.

In one of the additional aspects of the invention there is provided a curved bend of the pipeline, the inner surface of which is processed by means of the device according to the first aspect of the invention or in the implementation of the method according to the second aspect of the invention. An image of several steeply curved pipeline bends with a machined (turned) inner surface is shown in Fig. 13.

Preferably, the curved pipe bend includes at least one flange at the free end of the bend. The flange can be welded on one or both ends of the elbow and used to connect the elbow with a machined interior. If a branch has a flange at only one end, it is used for flange connection to a pipeline section, shut-off valve, valve or other similar device, while the free end can be connected by welding to another pipeline section, shut-off valve, valve or other similar device. . Similarly, if the elbow has a flange at each end, as shown in FIG. 14, then the outlet at both of its ends is connected by means of a flange connection to a pipeline section, shut-off valves, a faucet or other similar device.

The proposed device for turning the inner surface of a curved pipe bend simplifies the design of the device for manufacturing a curved pipe bend, improves the reliability of the device and the quality of processing. The ready-made branch can be used, for example, in devices for moving a ball piston in a calibrated section of a pipe piston calibration unit (TPU), it can be used in verification systems for measuring fluid flow meters at oil and gas producing, oil and gas processing and oil transportation or other enterprises in order to increase the accuracy of measuring fluid flow.

As described in detail above, the present invention provides the technical result of providing high accuracy and cleanliness of the processing of the inner surface of the curved bend of the pipeline using the present device and the implementation of the present method. In addition, the device itself, due to its design, is characterized by increased reliability, ease of use, the possibility of performing various operations for machining the inner surface of steeply curved pipe bends with different wall thicknesses of various diameters and sizes.

List of reference positions

Θ the angular size of the branch to be processed (the angle between the ends of the branch)

Θ1 angular size of the guide support (angle between the ends of the support)

R radius of the circle (curvature of the axial line of the processed branch)

R1 radius of the circle (curvature of the axial line of the guide support)

d internal diameter of the branch to be machined

d1 internal diameter of guide support

1 base

2 turntable

3 support table

4 guide support

5 clamping tool for guide support

6 clamping tool for guide support

7 clamping support

8 clamping support

9 clamping tool for machined branch

10 clamping tool for machined branch

11 clamping tool support

12 clamping support

13 branch to be processed

14 control device

15 console

16 headstock for spindle shaft

17 bracket

18 console sector

19 console sector

20 guide cavity

21 cavity of the processed outlet

22 bearing to install the spindle shaft

23 bearing to install the spindle shaft

24 spindle shaft

25 axis spindle shaft

26 tangent to the circle (curvature of the axial line of the guide support)

27 circle (curvature of the center line of the guide support)

28 center line (curvature of the center line of the processed branch)

29 turntable swivel axis

30 cover

31 nuts

32 machining tool holder

33 spline connection

34 groove for guide roller

35 groove for guide roller

36 guide roller groove

37 guide roller (headstock)

38 guide roller (headstock)

39 guide roller (headstock)

40 roller edging

41 axle roller

42 roller bracket

43 roller slider

44 face of the slider

45 face of the slider

46 slot edge for guide roller

47 edge of the groove for the guide roller

48 face of the slider

49 edge of the slider

52 clamping bar

53 screw

54 spring

55 bead

56 guide roller (console) prefabricated

57 guide roller (console) prefabricated

58 guide roller (console) prefabricated

59 roller

60 roller edging

61 roller axis

62 nut

63 bearing

64 lever

65 lever eye

66 lever axle

67 roller support bracket

68 plate

69 plate bracket

70 eye bracket

71 extension spring

72 inner surface (guide support)

73 emphasis

74 bolt

75 roller support bracket

78 roller support bracket

81 cutters

82 cutter slider

83 insert clamp

84 cutting insert

85 cutter slot

86 clamping bar

87 clamp bolt

88 adjusting bolt

89 base sole

90 bolts

92 turntable extension plate

93 elbow for gearmotor

94 gear motor

95 flexible shaft

96 clutch

97 clutch

98 motor gear motor

99 pad stand

100 stand screw

101 stand base

102 clamping tool post

103 clamp base

104 side clamp

105 top clamp

106 marking risk

107 marking risk

108 marking risk

110 side clamp

111 side clamp

112 top clamp

113 upper clamp.

Claims (24)

1. A device for processing the inner surface of a curved bend of the pipeline, containing: a base positioned on the turntable, the turntable being rotatably positioned on the support table; a console extending from the base and made curved; headstock for the spindle shaft, fixed on the free end of the console and made with the possibility of accommodating the spindle shaft, spindle shaft located in the headstock with the possibility of rotation; a processing tool holder mounted on the spindle shaft; clamping means fixed on the support table with the possibility of installing a guide support and a branch to be processed; at the same time, the headstock is configured to move in the cavity of the installed guide support and in the cavity of the installed processed outlet when turning the turntable with the base mounted on it with the console, and the headstock is configured to hold the axis of the spindle shaft in a position tangential to the circle centered on the axis of rotation turntable and a radius equal to the radius of curvature of the axial line of the processed branch, measured from the center on the axis of rotation of the turntable. 2. The device according to claim 1, containing a gear motor configured to transmit rotation to the spindle shaft by means of a flexible shaft, and the electric motor of the gear motor is made with numerical control. 3. The device according to claim 1, in which at least four clamping means are provided, two of which are intended for mounting the guide support and the other two are intended for mounting the branch to be processed, each clamping means comprising a stand and two clamps located on the rack of the clamping means , and the stand and the rack of the clamping means are rigidly fixed on the support table. 4. The device according to claim 1, in which at least two groups of guide rollers are provided, and the headstock for the spindle shaft is provided with one of at least two groups of guide rollers. 5. Apparatus according to claim 4, wherein the remaining of the at least two groups of guide rollers are located on the console. 6. The device according to claim 4 or 5, in which each of the at least two groups of guide rollers contains at least three rollers, and the rollers are spring-loaded. 7. The device according to claim 1, in which the curvature of the console essentially corresponds to the curvature of the axial line of the processed branch. 8. The device according to claim 1, in which the radius of curvature of the guide support is equal to the radius of curvature of the branch to be processed and the inner diameter of the guide support is equal to the internal diameter of the branch to be processed. 9. The device according to claim 1, in which the processing tool is a cutter for turning the inner surface of the branch to be processed. 10. A method for processing the inner surface of a steeply curved branch of a pipeline, comprising the steps of: install in the device according to claim 1 the guide support and the branch to be processed by means of clamping means so that the spindle shaft is located with its axis tangential to the circle centered on the axis of rotation of the turntable and with a radius equal to the radius of curvature of the axial line of the branch being processed, measured from the center at axis of rotation of the turntable; turning the turntable with the base and inserting the headstock with the spindle shaft and the processing tool holder placed on it into the cavity of the guide support; fixing the processing tool in the processing tool holder; cause the spindle shaft to rotate; the rotary table with the base is rotated and the inner surface of the steeply curved pipeline branch is processed. 11. A curved bend of the pipeline, the inner surface of which is processed by means of the device according to claim 1 or by carrying out the method according to claim 10. 12. A curved pipeline bend according to claim 11, comprising at least one flange at the free end of the bend.

Images