CN114042775A

CN114042775A - Metal pipe manufacturing equipment

Info

Publication number: CN114042775A
Application number: CN202111396158.1A
Authority: CN
Inventors: 徐常富; 刘志民; 蒙乐臻; 闻喻; 王泰
Original assignee: Jason Energy Technologies Co ltd
Current assignee: Jason Energy Technologies Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-02-15

Abstract

The embodiment of the present disclosure provides a manufacturing equipment of metal tube, including the pressing unit, the first heating unit and the drawing unit that set gradually, this pressing unit includes: the metal pipe processing device comprises a pressing device, a pressing power device and a first transmission device, wherein the pressing device is configured to apply a clamping force to a metal pipe to be processed, the pressing power device is configured to provide power for the pressing device, and the first transmission device is configured to transmit the power provided by the pressing power device to the pressing device; the first heating unit is configured to heat the metal pipe to be processed; the drawing unit includes: the manufacturing equipment of the metal pipe can break the limit of the width of the raw material of the metal pipe on the production outer diameter of the metal pipe, and realize the change of the outer diameter of the coiled tubing made of the metal material.

Description

Metal pipe manufacturing equipment

Technical Field

Embodiments of the present disclosure relate to a manufacturing apparatus of a metal pipe.

Background

A metal pipe for land and marine oil and gas wells is a circular or quasi-circular coiled tubing having a hollow cross-section which serves as a passage for transporting fluids, and having no joints at the periphery. The pipe for land and ocean oil and gas wells is a capillary pipe made of steel ingot or solid pipe blank through perforation, and then is made through hot rolling, cold rolling or cold drawing.

In the production process of the high-precision metal pipe, due to different pipe diameters of the metal pipe, the prefabricated standard pipe blank needs to be subjected to drawing reducing treatment, and the required metal pipe with the non-standard pipe diameter smaller than the standard pipe diameter is obtained. The method mainly adopts a drawing process that a moving core head is matched with a tube drawing die in the processing process of the metal tube, the diameter of the metal tube is changed by drawing to meet the required diameter requirement, the key point of the process in the production process is in the aspect of a die, the quality of a product is determined by the die in the using process, the existing tube drawing die adopts the die with a conical hole structure, and when the die is adopted for reducing the diameter of the metal tube, the defects of pits, folds, microcracks and the like are easily formed on the surface of the metal tube, so that the quality of the metal tube can be seriously influenced.

Disclosure of Invention

The utility model discloses an at least embodiment provides a manufacture equipment of tubular metal resonator, this manufacture equipment of tubular metal resonator is including the pressing unit, first heating unit and the drawing unit that set gradually to the realization is to the online reducing of tubular metal resonator, and then makes reducing, sizing, the performance promotion process of tubular metal resonator can go on in step online, thereby has greatly improved the production efficiency and the quality of tubular metal resonator.

At least one embodiment of the present disclosure provides a manufacturing equipment of a metal pipe, including a pressing unit, a first heating unit and a drawing unit that are sequentially arranged, wherein the pressing unit includes: the metal pipe processing device comprises a pressing device, a pressing power device and a first transmission device, wherein the pressing device is used for applying a clamping force to a metal pipe to be processed, the pressing power device is used for providing power for the pressing device, and the first transmission device is used for transmitting the power provided by the pressing power device to the pressing device; the first heating unit is configured to heat the metal pipe to be processed; the drawing unit comprises: the metal pipe drawing device comprises a drawing device, a drawing power device and a second transmission device, wherein the drawing device is configured to apply drawing force to the metal pipe to be processed so that the outer diameter of the metal pipe to be processed becomes smaller, the drawing power device is configured to provide power for the drawing device, and the second transmission device is configured to transmit the power of the drawing power device to the drawing device.

For example, in the manufacturing apparatus provided by at least one embodiment of the present disclosure, a direction in which the metal tube to be processed is conveyed from the compressing device to the drawing device is a first direction, the drawing device includes at least a first drawing machine and a second drawing machine arranged in sequence along the first direction, one of the first drawing machine and the second drawing machine is configured to apply a clamping force to the metal tube to be processed along the second direction, the other of the first drawing machine and the second drawing machine is configured to apply a clamping force to the metal tube to be processed along the third direction, the second direction and the third direction are perpendicular to each other and both lie in a first plane, and the first plane is a plane perpendicular to the first direction.

For example, in the manufacturing apparatus provided in at least one embodiment of the present disclosure, the first drawing machine is plural, the second drawing machine is plural, the number of the first drawing machine and the second drawing machine is the same, and the first drawing machine and the second drawing machine are alternately arranged along the first direction.

For example, in the manufacturing apparatus provided by at least one embodiment of the present disclosure, the first drawing machine includes first rollers that are aligned with each other, a cross-sectional shape of a first gap formed by the alignment of the first rollers is a first olive shape, the second drawing machine includes second rollers that are aligned with each other, a cross-sectional shape of a second gap formed by the alignment of the second rollers is a second olive shape, a long axis of the first olive shape is parallel to the third direction, a short axis of the first olive shape is parallel to the second direction, a long axis of the second olive shape is parallel to the second direction, and a short axis of the second olive shape is parallel to the third direction; alternatively, the major axis of the first olive is parallel to the second direction, the minor axis of the first olive is parallel to the third direction, and the major axis of the second olive is parallel to the third direction, the minor axis of the second olive is parallel to the second direction.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, a length of a long axis of the first olive shape is equal to a length of a long axis of the second olive shape, and a length of a short axis of the first olive shape is equal to a length of a short axis of the second olive shape.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, the first roll includes a first groove provided in an outer surface thereof and surrounding a full turn of a first bearing of the first roll, the first groove having a first arcuate shape in cross-section; the second roller comprises a second groove which is arranged on the outer surface of the second roller and surrounds a whole circle of a second bearing of the second roller, and the cross section of the second groove is in a second arc shape.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, the first arch has a first end point and a second end point on the first roll, the first arch is a portion of a first semicircle, and a half of a length of a connecting line of the first end point and the second end point is smaller than a radius of the first semicircle; the second segment has a third end and a fourth end on the second roll, the second segment is a portion of a second semicircle, and half of a length of a connecting line of the third end and the fourth end is smaller than a radius of the second semicircle.

For example, in the manufacturing apparatus provided in at least one embodiment of the present disclosure, a first cooling medium passage is provided in the first roll, and the first cooling medium passage is configured to cool the first bearing during drawing of the metal pipe to be processed; a second cooling medium channel is arranged in the second roller and is configured to cool the second bearing in the process of drawing the metal pipe to be processed.

For example, at least one embodiment of the present disclosure provides a manufacturing apparatus wherein the first roll and the second roll are adjusted by at least one of a motor-driven lead screw device, a worm gear, a hydraulic cylinder transmission device, a hydraulic motor-driven lead screw device, and an electric pusher device.

For example, in the manufacturing apparatus provided by at least one embodiment of the present disclosure, the drawing device further includes a third drawing machine and a fourth drawing machine disposed on a side of the first drawing machine and the second drawing machine away from the pressing unit along the first direction; the third drawing machine and the fourth drawing machine are arranged in sequence, one of the third drawing machine and the fourth drawing machine is configured to apply a clamping force to the metal pipe to be processed along the second direction, and the other of the third drawing machine and the fourth drawing machine is configured to apply a clamping force to the metal pipe to be processed along the third direction; the third drawing machine comprises third rollers which are mutually involutory, the cross section of a third gap formed by the involutory combination of the third rollers is in a third olive shape, the fourth drawing machine comprises fourth rollers which are mutually involutory, and the cross section of a fourth gap formed by the involutory combination of the fourth rollers is in a fourth olive shape; the length of the long axis of the third olive shape is equal to that of the long axis of the fourth olive shape, and both the lengths are smaller than those of the first olive shape and the second olive shape; the length of the short axis of the third olive shape is equal to the length of the short axis of the fourth olive shape, and both the lengths are smaller than the length of the short axis of the first olive shape and the length of the short axis of the second olive shape.

For example, in the manufacturing apparatus provided in at least one embodiment of the present disclosure, the number of the third drawing machines is plural, the number of the fourth drawing machines is plural, the number of the third drawing machines is the same as that of the fourth drawing machines, and the third drawing machines and the fourth drawing machines are alternately arranged along the first direction.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, a long axis of the third olive is parallel to the third direction, a short axis of the third olive is parallel to the second direction, and a long axis of the fourth olive is parallel to the second direction, and a short axis of the fourth olive is parallel to the third direction, or a long axis of the third olive is parallel to the second direction, a short axis of the third olive is parallel to the third direction, and a long axis of the fourth olive is parallel to the third direction, and a short axis of the fourth olive is parallel to the second direction.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, the pressing device includes at least a first pressing machine and a second pressing machine arranged in sequence along the first direction, one of the first pressing machine and the second pressing machine is configured to apply a clamping force to the metal pipe to be processed along the second direction, and the other of the first pressing machine and the second pressing machine is configured to apply a clamping force to the metal pipe to be processed along the third direction.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, the number of the first pressing machines is plural, the number of the second pressing machines is plural, the number of the first pressing machines and the number of the second pressing machines are the same, and the first pressing machines and the second pressing machines are alternately arranged along the first direction.

For example, in the manufacturing apparatus provided by at least one embodiment of the present disclosure, the first pressing machine includes first pressing rollers that are engaged with each other, a cross-sectional shape of a fifth gap formed after the first pressing rollers are engaged with each other is a first circle, the second pressing machine includes second pressing rollers that are engaged with each other, a cross-sectional shape of a sixth gap formed after the second pressing rollers are engaged with each other is a second circle, and a radius of the first circle is equal to a radius of the second circle.

For example, in a manufacturing apparatus provided in at least one embodiment of the present disclosure, the pressing power device and the drawing power device each include at least one of a reduction motor, a servo motor, a stepping motor, and a hydraulic motor.

For example, in the manufacturing apparatus provided in at least one embodiment of the present disclosure, the drawing unit includes a plurality of the second actuators and a plurality of the drawing devices, and the number of the second actuators is the same as the number of the drawing devices.

For example, in the manufacturing apparatus provided in at least one embodiment of the present disclosure, the pressing unit includes a plurality of the first transmission devices and a plurality of the pressing devices, and the number of the first transmission devices is the same as the number of the pressing devices.

For example, at least one embodiment of the present disclosure provides a manufacturing apparatus in which the first heater bank includes at least one of an electromagnetic induction heating furnace and a resistance heating furnace.

For example, at least one embodiment of the present disclosure provides a manufacturing apparatus, further comprising a second heating unit disposed on a side of the drawing unit away from the pressing unit, wherein the second heating unit is configured to heat-treat the metal tube to be processed after the drawing process, so that a crystalline phase of the metal tube to be processed is changed.

For example, at least one embodiment of the present disclosure provides the manufacturing apparatus, further comprising a sizing unit disposed on a side of the second heating unit away from the drawing unit, wherein the sizing unit is configured to fine-tune an outer diameter of the heat-treated metal pipe to be processed.

For example, in the manufacturing apparatus provided by at least one embodiment of the present disclosure, the sizing mill group includes a first sizing roller and a second sizing roller that are coupled to each other, and a cross-sectional shape of a seventh gap formed by coupling the first sizing roller and the second sizing roller is a third circle.

For example, at least one embodiment of the present disclosure provides the manufacturing apparatus, further comprising a third heating unit disposed on a side of the sizing unit away from the drawing unit, wherein the third heating unit is configured to temper the sized metal pipe to be processed.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a schematic perspective view of a manufacturing apparatus for a metal tube according to at least one embodiment of the present disclosure;

FIG. 2 is a schematic illustration of the action of a manufacturing apparatus on a metal pipe provided by an embodiment of the present disclosure;

FIG. 3 is a schematic plan view of the first drawing machine of FIG. 2 applying a clamping force to the metal tube to be processed;

FIG. 4 is a schematic cross-sectional view of a first gap formed after the two first rollers are involuted in FIG. 3;

fig. 5 is a schematic cross-sectional structure view of an involuted first roll in a plane with an X-axis and a Y-axis according to at least one embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of a first roll in a plane containing the Y-axis and the Z-axis according to at least one embodiment of the present disclosure;

FIG. 7 is a schematic perspective view of the second drawing machine of FIG. 2 applying a clamping force to the metal tube to be processed;

FIG. 8 is a schematic cross-sectional view of a second gap formed by the two second rollers of FIG. 7 after the two second rollers are involuted;

fig. 9 is a schematic cross-sectional structure view of an involuted second roll in a plane with an X-axis and a Z-axis according to at least one embodiment of the present disclosure;

fig. 10 is a schematic cross-sectional structure view of a second roll in a plane containing the Y-axis and the Z-axis according to at least one embodiment of the present disclosure;

FIG. 11 is a schematic illustration of the action of another manufacturing apparatus on a metal pipe according to an embodiment of the present disclosure;

fig. 12 is a schematic perspective view illustrating another apparatus for manufacturing a metal tube according to an embodiment of the present disclosure;

fig. 13 is a schematic perspective view illustrating another apparatus for manufacturing a metal tube according to an embodiment of the present disclosure;

fig. 14 is a schematic cross-sectional structure view of a fifth gap formed after the two first pressure rollers are combined in fig. 13;

fig. 15 is a schematic cross-sectional structure view of a sixth gap formed after the two second pressure rollers in fig. 13 are combined; and

fig. 16 is a schematic perspective view illustrating another apparatus for manufacturing a metal tube according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the field of oil and gas field exploitation, the requirements on the specification of the coiled tubing are different under different operation occasions or working conditions. For example, drilling operations typically require large diameter coiled tubing with an outer diameter of 2.875 inches or 3.5 inches, drilling and milling operations typically require coiled tubing with an outer diameter of 2.0 inches or 2.375 inches, and gas lift operations or velocity string operations typically require coiled tubing with an outer diameter of 1.5 inches or 1.75 inches.

At present, the production of the coiled tubing made of metal materials needs to longitudinally cut a raw material metal plate with a proper width according to the specification of the pipe diameter and the wall thickness. The width of a metal plate can only correspond to produce the coiled tubing of a metal material of an external diameter specification, produce the coiled tubing of metal materials of different pipe diameters, not only need indulge the metal plate of different width, still need change production roll mould. Therefore, the problems of long time consumption, poor universality and low production efficiency exist in the process of producing the coiled tubing made of metal materials with different pipe diameters, and in addition, the problem of storing a large amount of raw materials is also existed.

The inventor of the present disclosure has noticed that a manufacturing apparatus for a coiled tubing made of a metal material may be provided, that is, a special continuous drawing system and a subsequent heat treatment system are designed to complete the processing of the coiled tubing made of a metal material with an outer diameter specification, so as to achieve the purpose of changing the outer diameter of the coiled tubing made of a metal material, so that the outer diameter of the coiled tubing made of a metal material is dynamically variable. The method breaks through the limitation of the width of the metal plate on the production outer diameter of the coiled tubing, realizes the change of the outer diameter of the coiled tubing made of the metal material through the metal raw material with the same width by adopting a hot drawing process and a heat treatment production process, and finally realizes the production of the coiled tubing made of the metal material with different outer diameters. The inventors of the present disclosure have also found that a high-performance metal coiled tubing can be prepared by eliminating the machining stress, refining the crystal grains, improving the strength of the metal coiled tubing, improving the fatigue properties of the metal coiled tubing, and improving the corrosion resistance of the metal coiled tubing through a heat treatment system.

At least one embodiment of the present disclosure provides a manufacturing apparatus of a metal pipe, including a pressing unit, a first heating unit, and a drawing unit, which are sequentially disposed, wherein the pressing unit includes a pressing power device, a first transmission device, and a pressing device, the pressing power device is configured to provide power to the pressing device, the first transmission device is configured to transmit the power provided by the pressing power device to the pressing device, and the pressing device is configured to apply a clamping force to the metal pipe to be processed. The first heating unit is configured to heat a metal pipe to be processed. This drawing unit includes: the drawing power device is configured to provide power for the drawing device, the second transmission device is configured to transmit the power of the drawing power device to the drawing device, the drawing device is configured to apply drawing force to the metal pipe to be processed so that the outer diameter of the metal pipe to be processed is reduced, the manufacturing equipment of the metal pipe can break the limitation of the width of raw materials of the metal pipe on the production outer diameter of the metal pipe, the plate-shaped raw materials of the metal pipe with the same width can pass through, and the change of the outer diameter of the metal coiled tubing is finally realized by adopting a hot drawing process and a heat treatment production process so as to produce the metal coiled tubing with different outer diameters.

For example, fig. 1 is a schematic perspective view of a manufacturing apparatus for a metal pipe according to at least one embodiment of the present disclosure, and as shown in fig. 1, the manufacturing apparatus 10 for a metal pipe includes a pressing unit 11, a first heating unit 12, and a drawing unit 13, which are sequentially disposed, the pressing unit 11 includes a pressing power device 111, a first transmission device 112, and a pressing device 113, the pressing power device 111 is configured to provide power to the pressing device 113, the first transmission device 112 is configured to transmit the power provided by the pressing power device 111 to the pressing device 113, and the pressing device 113 is configured to apply a clamping force to a metal pipe 20 to be processed. The first heating assembly 12 is configured to heat a metal tube 20 to be processed. This drawing unit 13 includes: a drawing power device 131, a second transmission device 132 and a drawing device 133, wherein the drawing power device 131 is configured to provide power for the drawing device 133, the second transmission device 132 is configured to transmit the power of the drawing power device 131 to the drawing device 133, and the drawing device 133 is configured to apply a drawing force to the metal pipe 20 to be processed so that the outer diameter of the metal pipe 20 to be processed becomes smaller, so as to perform the diameter-changing process on the metal pipe 20 to be processed.

For example, fig. 2 is a schematic diagram of the effect of the manufacturing apparatus provided by an embodiment of the present disclosure on the metal pipe, as shown in fig. 2, the direction in which the metal pipe 20 to be processed is conveyed from the pressing device 113 to the drawing device 133 is a first direction X, the drawing device 133 at least includes a first drawing machine 1331 and a second drawing machine 1332 arranged in sequence along the first direction X, one of the first drawing machine 1331 and the second drawing machine 1332 is configured to apply a clamping force to the metal pipe 20 to be processed along a second direction Y, the other of the first drawing machine 1331 and the second drawing machine 1332 is configured to apply a clamping force to the metal pipe 20 to be processed along a third direction Z, the second direction Y and the third direction Z are perpendicular to each other and both lie in a first plane, the first plane is a plane perpendicular to the first direction X, and fig. 2 is a clamping force applied to the metal pipe 20 to be processed by the first drawing machine 1331 along the second direction Y, the second drawing machine 1332 applies a clamping force to the metal tube 20 to be processed in the third direction Z for example.

For example, as shown in fig. 2, the second direction Y is a direction perpendicular to the first direction X in a horizontal plane, and the third direction Z is a direction perpendicular to the first direction X in a vertical plane, such that the first drawing machine 1331 applies a clamping force to the metal pipe 20 to be processed in the horizontal plane, and the second drawing machine 1332 applies a clamping force to the metal pipe 20 to be processed in the vertical plane, but the embodiment of the present disclosure is not limited thereto, and may apply a clamping force to the metal pipe 20 to be processed in a plane at an angle to the horizontal plane, and apply a clamping force to the metal pipe 20 to be processed in a plane at an angle to the vertical plane.

For example, in some embodiments, the number of the first drawing machines 1331 is multiple, the number of the second drawing machines 1332 is multiple, the number of the first drawing machines 1331 is the same as that of the second drawing machines 1332, and the first drawing machines 1331 and the second drawing machines 1332 are alternately arranged along the first direction X, so that the order of sequentially repeating the metal pipe 20 to be processed along the second direction Y, the metal pipe 20 to be processed along the third direction Z, the pressing of the metal pipe 20 to be processed along the second direction Y, and the pressing of the metal pipe 20 to be processed along the third direction Z is achieved, that is, the metal pipe 20 to be processed is sufficiently drawn to improve the accuracy of the size of the finally formed metal pipe.

For example, fig. 3 is a schematic plan view illustrating a structure in which the first drawing machine in fig. 2 applies a clamping force to the metal pipe to be processed, and as shown in fig. 3, the first drawing machine 1331 includes first rollers 1331a that are aligned with each other, and at a position where two first rollers 1331a aligned with each other are closest to each other, a dimension of the metal pipe along the Y direction is changed, that is, a dimension of the metal pipe along the Y direction is reduced, that is, the first rollers 1331a are horizontal rollers.

For example, fig. 4 is a schematic cross-sectional structure diagram of a first gap formed by the two first rollers in fig. 3, for example, as shown in fig. 4, a cross-sectional shape of a first gap 1331a ' formed by the first roller 1331a in the involution is a first olive shape, a long axis AB of the first olive shape is parallel to the third direction Z, a short axis CD of the first olive shape is parallel to the second direction Y, and a size of the first gap 1331a ' in the direction parallel to the Y axis gradually decreases from a symmetry axis CD of the first gap 1331a ' parallel to the Y axis along the Z direction until it finally becomes a point. Likewise, from the symmetry axis CD of the first gap 1331a 'parallel to the Y axis in the direction opposite to the Z direction, the size of the first gap 1331 a' in the direction parallel to the Y axis gradually decreases until finally becoming a point.

For example, fig. 5 is a schematic cross-sectional structure view of an involuted first roll in a plane where the X axis and the Y axis are located according to at least one embodiment of the present disclosure, as shown in fig. 5, the first roll 1331a includes a first groove 1331c disposed on an outer surface thereof and surrounding a first bearing 1331b of the first roll 1331a for one complete turn, a cross-sectional shape of the first groove 1331c is a first arc 1331e, and the first arc 1331e is a shape formed by an arc ADB and a straight line AB in fig. 4, or a shape formed by an arc ACB and a straight line AB in fig. 4.

For example, fig. 6 is a schematic cross-sectional structure view of a plane of a Y axis and a Z axis of a first roll provided in at least one embodiment of the present disclosure, as shown in fig. 6, a maximum outer diameter dimension of the first roll 1331a is D1, a first arc 1331e has a first end point a and a second end point B on the first roll 1331a, the first arc 1331e is a portion of a first semicircle, a half 1/2L1 of a connecting line between the first end point a and the second end point B is smaller than a radius R1 of the first semicircle, and a center O1 of the first semicircle is located outside a straight line of the AB.

For example, as shown in fig. 6, a first cooling medium passage 1331d is provided in the first roll 1331a, and the first cooling medium passage 1331d is configured to cool down the first bearing 1331b during drawing of the metal pipe 20 to be processed. For example, since the first bearing 1331b of the first roller 1331a contains lubricating oil, circulating water needs to be injected into the first cooling medium passage 1331d to cool the first bearing 1331b, so as to prevent the lubricating oil from evaporating and completely causing the problem that the first roller 1331a cannot work, and the temperature of the metal pipe to be processed can be quickly reduced after the drawing process is quickly completed, so that the metal pipe after the drawing process can be placed in the air to be cooled to meet the process requirement.

For example, fig. 7 is a schematic perspective view illustrating a structure in which the second drawing machine in fig. 2 applies a clamping force to the metal pipe to be processed, and as shown in fig. 7, the second drawing machine 1332 includes second rolling rollers 1332a that are aligned with each other, and at a position where two second rolling rollers 1332a aligned with each other are closest to each other, a dimension of the metal pipe in the Z direction is changed, that is, a dimension of the metal pipe in the Z direction is reduced, that is, the second rolling rollers 1332a are vertical rollers.

For example, fig. 8 is a schematic cross-sectional structure diagram of a second gap formed by the two second rollers in fig. 7, for example, in combination with fig. 7 and 8, a cross-sectional shape of a second gap 1332a ' formed by the second rollers 1332a in the alignment is a second olive shape, a long axis EF of the second olive shape is parallel to the second direction Y, a short axis GH of the second olive shape is parallel to the third direction Z, and a size of the second gap 1332a ' in a direction parallel to the Z axis gradually decreases from a symmetry axis GH of the second gap 1332a ' parallel to the Z axis along the Y direction until finally becoming a point. Likewise, from the symmetry axis GH of the second gap 1332a 'parallel to the Z axis in the direction opposite to the Y direction, the dimension of the second gap 1332 a' in the direction parallel to the Z axis gradually decreases until finally becoming a point.

For example, fig. 9 is a schematic cross-sectional structure view of an involuted second roller in a plane where the X axis and the Z axis are located according to at least one embodiment of the present disclosure, as shown in fig. 9, the second roller 1332a includes a second groove 1332c provided on an outer surface thereof and surrounding a second bearing 1332b of the second roller 1332a for one complete turn, a cross-sectional shape of the second groove 1332c is a second arc 1332e, and the second arc 1332e is a shape formed by an arc EHF and a straight line EF in fig. 8, or a shape formed by an arc EGF and a straight line EF in fig. 8.

For example, fig. 10 is a schematic cross-sectional structure view of a plane of a second roll in which Y-axis and Z-axis are located according to at least one embodiment of the present disclosure, as shown in fig. 10, a maximum outer diameter dimension of the second roll 1332a is D2, a second arc 1332E has a third end point E and a fourth end point F on the second roll 1332a, the second arc 1332E is a portion of a first semicircle, a half 1/2L2 of a connecting line between the third end point E and the fourth end point F is smaller than a radius R2 of the second semicircle, and a center O2 of the second semicircle is located outside a straight line of the EF.

For example, as shown in fig. 10, a second cooling medium passage 1332d is provided in the second roll 1332a, and the second cooling medium passage 1332d is configured to cool down the second bearing 1332b during drawing of the metal pipe 20 to be processed. For example, since the second bearing 1332b of the second roller 1332a contains lubricating oil, circulating water needs to be injected into the second cooling medium passage 1332d to cool the second bearing 1332b, so as to prevent the lubricating oil from evaporating and completely causing the problem that the second roller 1332a cannot work, and the temperature of the metal pipe to be processed can be quickly reduced after the drawing process is quickly completed, so that the metal pipe after the drawing process can be placed in air to be cooled to meet the process requirement.

Note that the first drawing machine 1331 may include other elements, such as a conveyor belt, besides the first rollers 1331a that are engaged with each other, and the second drawing machine 1332 may include other elements, such as a second roller 1332a that is engaged with each other.

For example, in conjunction with fig. 2 to 10, the length of the major axis AB of the first olive shape is equal to the length of the major axis EF of the second olive shape, and the length of the minor axis CD of the first olive shape is equal to the length of the minor axis GH of the second olive shape, so that it is ensured that the metal pipe 20 to be processed is pressed in the second direction Y while passing through the first roll 1331a, such that the size of the metal pipe 20 to be processed in the third direction Z becomes larger, and the size of the metal pipe 20 to be processed in the second direction Y becomes smaller, thereby completing the deformation of the first step on the metal pipe 20 to be processed. When the metal pipe 20 to be processed is pressed in the third direction Z while passing through the second rolling roller 1332a so that the size in the second direction Y becomes large and the size in the third direction Z becomes small, so that the sectional shape of the finally formed metal pipe 20 is circular, and the outer diameter of the metal pipe 20 to be processed is reduced with respect to before being processed by the first rolling roller 1331a and the second rolling roller 1332a, thereby completing the deformation of the second step to the metal pipe 20 to be processed.

It should be noted that the olive shape is a closed figure composed of two minor arcs, and the width gradually decreases from the middle area to the edge area until the width decreases to a point at the edge.

For example, in one example, the running speed of the drawing device 133 is adjusted to be higher than 2% -8% of the running speed of the pressing device 113, so that the drawing device 133 applies a drawing force to the metal tube 20 to be processed, so that the metal tube is drawn, that is, the metal tube 20 to be processed is in a drawing deformation state, and after the metal tube is processed by the metal tube manufacturing equipment 10, the ovality of the drawn metal tube can be ensured to be not more than 5%.

For example, the drawing device 133 is operated at a speed higher than 2%, 3%, 4%, 5%, 6%, 7%, or 8% of the operation speed of the pressing device 113. This enables the drawing of the metal tube 20 to be processed and also reduces the ovality of the drawn metal tube 11.

It should be noted that, when the operation speed of the drawing device 133 is lower than 2% of the operation speed of the pressing device 113, the drawing force of the drawing device 133 on the metal tube 20 to be processed is too small to change the outer diameter of the metal tube 20 to be processed; when the operation speed of the drawing device 133 is higher than 8% of the operation speed of the pressing device 113, the drawing force of the drawing device 133 on the metal pipe 20 to be processed is too large, so that the ovality of the finally obtained metal pipe is too large, and even the finally obtained metal pipe is bent and deformed, so that the requirement of the drawn metal pipe on the ovality cannot be met.

For example, fig. 2 to 10 illustrate an example in which the first opposed rolling roll 1331a is a horizontal roll and the second opposed rolling roll 1332a is a vertical roll. In another example, the first mutually opposed nip roller 1331a may be a vertical roller, and the second mutually opposed nip roller 1332a may be a horizontal roller. For example, fig. 11 is a schematic diagram of an action of another manufacturing apparatus on a metal pipe according to an embodiment of the present disclosure, as shown in fig. 11, a description of the first roller 1331a may refer to a description of the second roller 1332a in fig. 7 to 10, a description of the second roller 1332a may refer to a description of the first roller 1331a in fig. 3 to 6, and the embodiment of the present disclosure is not limited thereto.

In the structure of the manufacturing apparatus shown in fig. 11, the metal pipe 20 to be processed is pressed in the third direction Z while passing through the first roll 1331a, so that the size of the metal pipe 20 to be processed in the second direction Y becomes larger and the size in the third direction Z becomes smaller, thereby completing the deformation of the first step for the metal pipe 20 to be processed. When the metal pipe 20 to be processed is pressed in the second direction Y while passing through the second rolling roller 1332a so that the size in the third direction Z becomes large, the size in the second direction Y becomes small, so that the sectional shape of the finally formed metal pipe 20 is circular, and the outer diameter of the metal pipe 20 to be processed is reduced with respect to before being processed by the first rolling roller 1331a and the second rolling roller 1332a, thereby completing the deformation of the second step to the metal pipe 20 to be processed.

For example, in some examples, the operating speeds of the first and

second rollers

1331a and 1332a are adjusted by at least one of a motor-driven lead screw arrangement, a worm gear arrangement, a hydraulic cylinder arrangement, a hydraulic motor-driven lead screw arrangement, and an electric push rod arrangement, such that the first and

second rollers

1331a and 1332a maintain a steady operating speed as desired.

For example, fig. 12 is a schematic perspective view illustrating a manufacturing apparatus of another metal tube according to an embodiment of the present disclosure, and as shown in fig. 12, on the basis of the structure shown in fig. 2, the drawing device 133 further includes a third drawing machine 1333 and a fourth drawing machine 1334 disposed on the sides of the first drawing machine 1331 and the second drawing machine 1332 away from the pressing unit 11 along the first direction X. The third drawing machine 1333 and the fourth drawing machine 1334 are sequentially arranged, one of the third drawing machine 1333 and the fourth drawing machine 1334 is configured to apply a clamping force to the metal tube 20 to be processed along the second direction Y, the other of the third drawing machine 1333 and the fourth drawing machine 1334 is configured to apply a clamping force to the metal tube 20 to be processed along the third direction Z, the second direction Y and the third direction Z are perpendicular to each other and are both located in a first plane, the first plane is a plane perpendicular to the first direction X, and corresponding to fig. 2, fig. 12 illustrates an example where the third drawing machine 1333 applies a clamping force to the metal tube 20 to be processed along the second direction Y, and the fourth drawing machine 1334 applies a clamping force to the metal tube 20 to be processed along the third direction Z.

For example, the third drawing machine 1333 includes third mutually-matched rollers 1333a, the third mutually-matched rollers 1333a are horizontal rollers, a cross-sectional shape of a third gap formed by the third mutually-matched rollers 1333a is a third olive shape, a length of a long axis of the third olive shape is smaller than that of a long axis of the first olive shape, a length of a short axis of the third olive shape is smaller than that of the short axis of the first olive shape, and other relevant features of the third olive shape can be referred to the above-mentioned relevant description about the first olive shape, and are not described again here.

For example, the fourth drawing machine 1334 includes a fourth roller 1334a that is engaged with each other, the fourth roller 1334a that is engaged with each other is a vertical roller, the cross-sectional shape of a fourth gap formed by the engagement of the fourth roller 1334a is a fourth olive shape, the length of the long axis of the fourth olive shape is smaller than that of the long axis of the second olive shape, and the length of the short axis of the fourth olive shape is smaller than that of the short axis of the second olive shape, and the relevant features of the fourth olive shape can be referred to the above-mentioned relevant description about the second olive shape, and will not be described herein again.

With reference to fig. 12 and 2, the length of the long axis of the third olive shape is equal to the length of the long axis of the fourth olive shape, and both are smaller than the length of the long axis of the first olive shape and the length of the long axis of the second olive shape. The length of the short axis of the third olive shape is equal to that of the short axis of the fourth olive shape, and both the lengths are smaller than those of the first olive shape and the second olive shape.

For example, in some examples, the number of the third drawing machines 1333 is plural, the number of the fourth drawing machines 1334 is plural, the number of the third drawing machines 1333 and the fourth drawing machines 1334 is the same, and the third drawing machines 1333 and the fourth drawing machines 1334 are alternately arranged along the first direction X.

For example, the first drawing machine 1331 and the second drawing machine 1332 may perform a drawing process on a first portion of the metal tube so that the first portion of the metal tube has a first outer diameter, and the third drawing machine 1333 and the fourth drawing machine 1334 may perform a drawing process on a second portion of the metal tube so that the first outer diameter is larger than the second outer diameter, so that the first portion and the second portion of the metal tube have different outer diameters during the process of processing the metal tube, and thus, according to actual needs, the metal tube having different outer diameter sizes at different portions may be finally obtained.

Alternatively, in some examples, the first drawing machine 1331 and the second drawing machine 1332 may be controlled to stop running, and the third drawing machine 1333 and the fourth drawing machine 1334 may be turned on to directly form the metal pipe having the second outer diameter.

For example, in another example, the first mutually-aligned roll 1331a may be a horizontal roll, the second mutually-aligned roll 1332a may be a vertical roll, the third mutually-aligned roll 1333a may be a vertical roll, the fourth mutually-aligned roll 1334a may be a horizontal roll, and the characteristics of the third mutually-aligned roll 1333a and the fourth mutually-aligned roll 1334a may be described with reference to fig. 11 for the second mutually-aligned roll 1332a and the first mutually-aligned roll 1331a, respectively, which is not limited in this embodiment of the present disclosure.

For example, in another example, the first mutually-aligned roll 1331a may be a vertical roll, the second mutually-aligned roll 1332a may be a horizontal roll, the third mutually-aligned roll 1333a may be a horizontal roll, the fourth mutually-aligned roll 1334a may be a vertical roll, and the characteristics of the third mutually-aligned roll 1333a and the fourth mutually-aligned roll 1334a may be described with reference to fig. 11 for the first mutually-aligned roll 1331a and the second mutually-aligned roll 1332a, respectively, which is not limited in this embodiment of the present disclosure.

For example, in some examples, the drawing power device 131 shown in fig. 1 includes at least one of a reduction motor, a servo motor, a stepping motor, and a hydraulic motor to hinder the transfer of the metal pipe 20 to be processed.

For example, it should be noted that the drawing unit 13 may include a plurality of second actuators 132 and a plurality of drawing devices 133, and the number of the second actuators 132 is the same as that of the drawing devices 133, so that each drawing device 133 corresponds to one second actuator 132, thereby enabling the second actuators 132 to individually and flexibly control the corresponding drawing devices 133.

For example, in the structure of the manufacturing apparatus shown in fig. 2, 11, and 12, the pressing devices 113 each include only one pressing machine, and in some examples, the pressing devices 113 may include a plurality of pressing machines.

For example, fig. 13 is a schematic perspective view illustrating a manufacturing apparatus for a metal pipe according to an embodiment of the present disclosure, and as shown in fig. 13, the pressing device 113 includes at least a first pressing machine 113a and a second pressing machine 113b arranged in sequence along the first direction X, one of the first pressing machine 113a and the second pressing machine 113b is configured to apply a clamping force to the metal pipe 20 to be processed along the second direction Y, and the other of the first pressing machine 113a and the second pressing machine 113b is configured to apply a clamping force to the metal pipe 20 to be processed along the third direction Z.

For example, in the structure shown in fig. 13, the first press 113a includes first press rollers 113a1 that are opposed to each other, and the first press rollers 113a1 that are opposed to each other apply a clamping force in the second direction Y to the metal pipe 20 to be processed. The second pressing machine 113b includes a second pressing roller 113b1 which is opposed to each other, and the second pressing roller 113b1 which is opposed to each other applies a clamping force in the third direction Z to the metal pipe 20 to be processed, and although the first pressing roller 113a1 which is opposed to each other and the second pressing roller 113b1 which is opposed to each other apply clamping forces in the second direction Y and the third direction Z to the metal pipe 20 to be processed, respectively, the outer diameter of the metal pipe to be processed is not changed.

For example, fig. 14 is a schematic cross-sectional structure view of a fifth gap formed by the two first pressure rollers in fig. 13 after being aligned, and for example, as shown in fig. 14, a cross-sectional shape of the fifth gap 113a 1' formed by the two first pressure rollers 113a1 after being aligned is a first circle.

For example, fig. 15 is a schematic cross-sectional structure view of a sixth gap formed by the two second pressure rollers in fig. 13 after being aligned, and for example, as shown in fig. 15, the cross-sectional shape of the sixth gap 113b 1' formed by the two second pressure rollers 113b1 after being aligned is a second circle.

For example, in connection with fig. 14 and 15, the radius r1 of the first circle and the radius r2 of the second circle are equal, so that the clamping and straightening processes of the metal tube 20 to be processed can be realized.

It should be noted that the first pressing machine 113a may include other elements, such as a conveyor belt, besides the first pressing roller 113a1, and the second pressing machine 113b may include other elements, such as a conveyor belt, besides the second pressing machine 113 b.

For example, in some examples, the number of the first compactors 113a is plural, the number of the second compactors 113b is plural, the number of the first compactors 113a is the same as that of the second compactors 113b, and the first compactors 113a and the second compactors 113b are alternately arranged along the first direction X.

For example, in some examples, the compaction power plant 111 shown in fig. 1 includes at least one of a speed reduction motor, a servo motor, a stepper motor, and a hydraulic motor to impede the transport of the metal tube 20 to be processed.

For example, it should be noted that the pressing unit 11 may include a plurality of first transmission devices 112 and a plurality of pressing devices 113, and the number of the first transmission devices 112 is the same as that of the pressing devices 113, so that each pressing device 113 corresponds to one first transmission device 112, and thus the first transmission devices 112 individually and flexibly control the corresponding pressing devices 113.

For example, in one example, the first heating train 12 includes at least one of an electromagnetic induction furnace and a resistance furnace that can uniformly and rapidly heat the metal tube to be processed relative to conventional furnaces.

It should be noted that the number of the first heating unit 12 may be plural, and in fig. 1, the number of the first heating unit 12 is two, but the embodiment of the present disclosure is not limited thereto. The plurality of first heating units 12 can avoid insufficient heating of the metal pipe 20 when one first heating unit 12 is started, so that the plurality of first heating units 12 can be started simultaneously to realize sufficient heating of the metal pipe 20 to be processed.

For example, fig. 16 is a schematic perspective view of another manufacturing apparatus for a metal tube according to an embodiment of the present disclosure, the manufacturing apparatus 10 further includes a second heating unit 14 disposed on a side of the drawing unit 13 away from the pressing unit 113, and the second heating unit 14 is configured to perform a heat treatment on the metal tube 20 to be processed after the drawing process, so that a crystalline phase of the metal tube 20 to be processed is changed.

For example, in one example, the manufacturing apparatus 10 further includes a sizing unit 15 disposed on a side of the second heating unit 14 away from the drawing unit 13, the sizing unit 15 being configured to fine-tune an outer diameter of the heat-treated metal pipe 20 to be processed to reduce ovality of the drawn metal pipe 20 so that the cross section of the metal pipe 20 is closer to a circular shape.

For example, in one example, the sizing mill 15 includes a first sizing roller 151 and a second sizing roller 152 that are coupled to each other, a cross-sectional shape of a seventh gap 153 formed by the coupling of the first sizing roller 151 and the second sizing roller 152 is a third circle, and the sizing mill 15 may perform a straightening process on the processed metal pipe at the normal temperature so that the cross-section of the processed metal pipe is a circle.

For example, in one example, the manufacturing plant 10 further comprises a third heating assembly 16 arranged on a side of the sizing assembly 15 remote from the drawing assembly 13, the third heating assembly 16 being configured to temper the sized metal tube 20 to be processed. For example, the tempering process may include: the metal pipe 20 after the sizing treatment is heated by the third heating furnace group 16, and the tempering temperature range is 400-720 ℃, so that the performance of the metal pipe 20 is improved. For example, the tensile strength, yield strength, hardness, fatigue properties, etc. of the metal tube 20 are all improved.

The manufacturing equipment of the metal tube provided by at least one embodiment of the disclosure has at least one of the following beneficial technical effects:

(1) the manufacturing equipment provided by at least one embodiment of the disclosure can apply drawing force to the metal pipe to be processed so that the outer diameter of the metal pipe to be processed becomes small, and therefore the metal pipe with the appropriate outer diameter can be produced according to actual requirements, and the application range of the formed metal pipe is wider.

(2) The manufacturing equipment provided by at least one embodiment of the present disclosure can break the limitation of the width of the raw material of the metal pipe on the production outer diameter of the metal pipe, and realize the change of the outer diameter of the coiled tubing made of the metal material by using the plate-shaped raw material of the metal pipe with the same width, and adopting the hot drawing process and the heat treatment production process, so as to produce the coiled tubing made of the metal material with different outer diameters.

The following points need to be explained:

(1) the drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.

(2) For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale.

(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.

The above description is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be subject to the scope of the claims.

Claims

1. A manufacturing device of a metal tube comprises a pressing unit, a first heating unit and a drawing unit which are arranged in sequence, wherein,

the pressing unit comprises:

a pinching device configured to apply a pinching force to the metal pipe to be processed,

a compaction power device configured to provide power to the compaction device,

the first transmission device is configured to transmit power provided by the pressing power device to the pressing device;

the first heating unit is configured to heat the metal pipe to be processed;

the drawing unit comprises:

a drawing device configured to apply a drawing force to the metal pipe to be processed so that an outer diameter of the metal pipe to be processed becomes smaller,

a pulling power device configured to provide power to the pulling device,

a second transmission device configured to transmit power of the drawing power device to the drawing device.

2. The manufacturing apparatus according to claim 1,

the transmission direction of the metal pipe to be processed from the pressing device to the drawing device is a first direction, the drawing device at least comprises a first drawing machine and a second drawing machine which are sequentially arranged along the first direction, one of the first drawing machine and the second drawing machine is configured to apply clamping force to the metal pipe to be processed along the second direction, the other of the first drawing machine and the second drawing machine is configured to apply clamping force to the metal pipe to be processed along the third direction, the second direction and the third direction are mutually perpendicular and are both located in a first plane, and the first plane is a plane perpendicular to the first direction.

3. The manufacturing apparatus according to claim 2,

the first drawing machines are multiple, the second drawing machines are multiple, the number of the first drawing machines is the same as that of the second drawing machines, and the first drawing machines and the second drawing machines are alternately arranged along the first direction.

4. The manufacturing apparatus according to claim 2,

the first drawing machine comprises first rollers which are mutually involutory, the cross section of a first gap formed by the involutory of the first rollers is in a first olive shape, the second drawing machine comprises second rollers which are mutually involutory, the cross section of a second gap formed by the involutory of the second rollers is in a second olive shape,

a major axis of the first olive is parallel to the third direction, a minor axis of the first olive is parallel to the second direction, and a major axis of the second olive is parallel to the second direction, a minor axis of the second olive is parallel to the third direction; alternatively, the first and second electrodes may be,

the major axis of the first olive is parallel to the second direction, the minor axis of the first olive is parallel to the third direction, and the major axis of the second olive is parallel to the third direction, the minor axis of the second olive is parallel to the second direction.

5. A manufacturing apparatus as set forth in claim 4 wherein the length of the major axis of said first olive is equal to the length of the major axis of said second olive, and the length of the minor axis of said first olive is equal to the length of the minor axis of said second olive.

6. The manufacturing apparatus according to claim 4,

the first roller comprises a first groove which is arranged on the outer surface of the first roller and surrounds a whole circle of a first bearing of the first roller, and the cross section of the first groove is in a first arc shape;

the second roller comprises a second groove which is arranged on the outer surface of the second roller and surrounds a whole circle of a second bearing of the second roller, and the cross section of the second groove is in a second arc shape.

7. The manufacturing apparatus according to claim 6,

the first arch has a first end point and a second end point on the first roll, the first arch is a portion of a first semicircle, and half of the length of a connecting line of the first end point and the second end point is smaller than the radius of the first semicircle;

the second segment has a third end and a fourth end on the second roll, the second segment is a portion of a second semicircle, and half of a length of a connecting line of the third end and the fourth end is smaller than a radius of the second semicircle.

8. The manufacturing apparatus according to claim 6,

a first cooling medium channel is arranged in the first roller and is configured to cool the first bearing in the process of drawing the metal pipe to be processed;

a second cooling medium channel is arranged in the second roller and is configured to cool the second bearing in the process of drawing the metal pipe to be processed.

9. The manufacturing apparatus according to claim 4,

the first roller and the second roller are adjusted through at least one of a motor-driven lead screw device, a worm and gear transmission device, a hydraulic cylinder transmission device, a hydraulic motor-driven lead screw device and an electric push rod device.

10. The manufacturing apparatus according to claim 2,

the drawing device further comprises a third drawing machine and a fourth drawing machine which are arranged on one sides of the first drawing machine and the second drawing machine far away from the pressing machine set along the first direction;

the third drawing machine and the fourth drawing machine are arranged in sequence, one of the third drawing machine and the fourth drawing machine is configured to apply a clamping force to the metal pipe to be processed along the second direction, and the other of the third drawing machine and the fourth drawing machine is configured to apply a clamping force to the metal pipe to be processed along the third direction;

the third drawing machine comprises third rollers which are mutually involutory, the cross section of a third gap formed by the involutory combination of the third rollers is in a third olive shape, the fourth drawing machine comprises fourth rollers which are mutually involutory, and the cross section of a fourth gap formed by the involutory combination of the fourth rollers is in a fourth olive shape;

the length of the long axis of the third olive shape is equal to that of the long axis of the fourth olive shape, and both the lengths are smaller than those of the first olive shape and the second olive shape;

the length of the short axis of the third olive shape is equal to the length of the short axis of the fourth olive shape, and both the lengths are smaller than the length of the short axis of the first olive shape and the length of the short axis of the second olive shape.

11. The manufacturing apparatus according to claim 10, wherein the number of the third drawing machines is plural, the number of the fourth drawing machines is plural, the number of the third drawing machines and the number of the fourth drawing machines are the same, and the third drawing machines and the fourth drawing machines are alternately arranged along the first direction.

12. The manufacturing apparatus according to claim 10,

the major axis of the third olive is parallel to the third direction, the minor axis of the third olive is parallel to the second direction, and the major axis of the fourth olive is parallel to the second direction, the minor axis of the fourth olive is parallel to the third direction, or the major axis of the third olive is parallel to the second direction, the minor axis of the third olive is parallel to the third direction, and the major axis of the fourth olive is parallel to the third direction, the minor axis of the fourth olive is parallel to the second direction.

13. The manufacturing apparatus according to claim 2, wherein the pressing device includes at least a first pressing machine and a second pressing machine arranged in sequence along the first direction, one of the first pressing machine and the second pressing machine is configured to apply a clamping force to the metal pipe to be processed along the second direction, and the other of the first pressing machine and the second pressing machine is configured to apply a clamping force to the metal pipe to be processed along the third direction.

14. The manufacturing apparatus according to claim 13, wherein the number of the first compactors is plural, the number of the second compactors is plural, the number of the first compactors and the number of the second compactors are the same, and the first compactors and the second compactors are alternately arranged along the first direction.

15. The manufacturing equipment according to claim 13, wherein the first pressing machine comprises first pressing rollers which are mutually butted, the cross-sectional shape of a fifth gap formed by the first pressing rollers after being butted is a first circle, the second pressing machine comprises second pressing rollers which are mutually butted, the cross-sectional shape of a sixth gap formed by the second pressing rollers after being butted is a second circle, and the radius of the first circle is equal to the radius of the second circle.

16. The manufacturing apparatus of claim 1, wherein the compaction and the drawing power means each comprise at least one of a gear motor, a servo motor, a stepper motor, and a hydraulic motor.

17. The manufacturing apparatus according to claim 1, wherein the drawing unit includes a plurality of the second actuators and a plurality of the drawing devices, and the number of the second actuators and the number of the drawing devices are the same.

18. The manufacturing apparatus according to claim 1, wherein the press unit includes a plurality of the first transmission devices and a plurality of the press devices, and the number of the first transmission devices and the number of the press devices are the same.

19. The manufacturing apparatus according to claim 1, wherein the first heater bank includes at least one of an electromagnetic induction heating furnace and a resistance heating furnace.

20. The manufacturing apparatus according to any one of claims 1 to 19, further comprising a second heating unit disposed on a side of the drawing unit away from the pressing unit, wherein the second heating unit is configured to heat-treat the metal tube to be processed after the drawing process, so that a crystal phase of the metal tube to be processed is changed.

21. The manufacturing apparatus of claim 20, further comprising a sizing assembly disposed on a side of the second heating assembly remote from the drawing assembly, wherein the sizing assembly is configured to fine tune an outer diameter of the heat treated metal tube to be processed.

22. The manufacturing apparatus of claim 21, wherein the sizing assembly includes first and second sizing rolls that are intermeshed, and wherein a seventh gap formed between the first and second sizing rolls is a third circular cross-sectional shape.

23. The manufacturing apparatus of claim 21, further comprising a third heating assembly disposed on a side of the sizing assembly remote from the drawing assembly, wherein the third heating assembly is configured to temper the sized metal tube to be processed.