Steel pipe pole bending machine based on stress maintenance and steel pipe pole machining system

Abstract

The invention relates to the technical field of steel pipe bending, in particular to a steel pipe pole bending machine based on stress maintenance and a steel pipe pole machining system.The steel pipe pole bending machine comprises a machining table and a guide rail fixed to the machining table, and a movable table is slidably installed on the guide rail; the clamping assembly is arranged on the moving table and used for fixing the steel pipe; the bending mechanism is arranged on the machining table, a turnover plate is connected to the bending mechanism, a radius regulating and controlling mechanism connected with the bending mechanism is further arranged on the machining table, and conical discs which are symmetrically arranged are connected to the radius regulating and controlling mechanism; and the synchronous translation mechanism is arranged on the machining table and connected with the radius regulation and control mechanism, the synchronous translation mechanism can control the moving table to move synchronously when the radius regulation and control mechanism moves, and through mutual cooperation of a conical disc and a turnover plate, the bending amount of the steel pipe can be reduced step by step so as to guarantee stress changes of the steel pipe during bending.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe bending, and specifically to a steel pipe pole bending machine and a steel pipe pole processing system based on stress retention. Background Art

[0002] When a steel pipe is bent under the action of an external force, the outer layer of the metal is subjected to tensile stress, and the inner layer of the metal is subjected to compressive stress. Under the action of these two stresses, the shape of the steel pipe changes. The magnitude and distribution of the stress depend on many factors such as the bending radius, the size of the steel pipe (diameter and wall thickness), material properties, and the bending method.

[0003] A smaller bending radius will cause an increase in the outer layer tensile stress and the inner layer compressive stress, which is likely to cause the rupture or excessive deformation of the steel pipe. Parameters such as the bending speed, pressure, and angle will all affect the bending quality of the steel pipe. An excessively fast bending speed may lead to stress concentration, an excessively large pressure may cause the steel pipe to be excessively deformed or ruptured, and an inaccurate bending angle will affect the service performance of the final product.

[0004] Therefore, in order to avoid stress concentration, the steel pipe needs to be bent in multiple times, and the bending radius gradually decreases each time. However, when the existing bending machine adjusts the bending radius, it is necessary to replace the bending die, and the replacement of the bending die will cause a change in the corresponding bending point position, which requires corresponding adjustment of the positions of the clamped workpiece and the bent workpiece, resulting in an overly complex bending process and it is difficult to avoid deviation in the adjustment accuracy, leading to a problem of poor bending accuracy. Summary of the Invention

[0005] The purpose of the present invention is to provide a steel pipe pole bending machine and a steel pipe pole processing system based on stress retention to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A steel pipe pole bending machine based on stress retention, comprising: A processing table, and a guide rail fixed on the processing table, on which a moving table is slidably installed; It further includes: A clamping assembly, arranged on the moving table, for fixing the steel pipe; A bending mechanism, arranged on the processing table, a turning plate is connected to the bending mechanism, a radius adjustment mechanism connected to the bending mechanism is further arranged on the processing table, a pair of symmetrically arranged conical discs are connected to the radius adjustment mechanism, the radius adjustment mechanism can adjust the distance between the two conical discs, and drive the turning plate to move towards or away from the conical discs through the bending mechanism; The synchronous translation mechanism is arranged on the processing table and connected to the radius adjustment mechanism. When the radius adjustment mechanism moves, the synchronous translation mechanism can control the synchronous movement of the moving table.

[0007] As a further solution of the present invention: The radius adjustment mechanism includes a second motor fixedly installed on the processing table. A bidirectional lead screw connected to the output shaft of the second motor is rotatably installed on the processing table. Symmetrically arranged second thread sleeves are threadedly connected to the bidirectional lead screw. The second thread sleeve is fixedly connected to the conical disk, and a driven component is arranged on the second thread sleeve.

[0008] As a further solution of the present invention: The driven component includes a rotating plate rotatably installed on the second thread sleeve. A support sleeve is fixed on the rotating plate, and a support rod is slidably installed in the support sleeve.

[0009] As a further solution of the present invention: The bending mechanism includes a worm rotatably installed on the processing table. A rotating sleeve sleeved on the bidirectional lead screw is rotatably installed on the processing table. A worm gear and a rotating table are fixed on the rotating sleeve. The worm is meshed with the worm gear, and a sliding component connected to the support rod is arranged on the rotating table.

[0010] As a further solution of the present invention: The sliding component includes symmetrically arranged sliding grooves opened on the rotating table. A sliding plate is slidably installed in the sliding groove. The sliding plate is fixedly connected to the support rod. A fixing plate is fixed on the sliding plate, and an adjusting structure is arranged on the fixing plate.

[0011] As a further solution of the present invention: The adjusting structure includes a first motor fixedly installed on the fixing plate. A first lead screw connected to the output shaft of the first motor is rotatably installed on the fixing plate. A first thread sleeve is threadedly connected to the first lead screw; It further includes a first guiding column fixedly installed on the fixing plate. A first guiding sleeve is slidably installed on the first guiding column. A connecting plate fixedly connected to the first thread sleeve is fixed on the first guiding sleeve. The connecting plate is fixedly connected to the flipping plate.

[0012] As a further solution of the present invention: The synchronous translation mechanism includes a rotating rod and a second lead screw rotatably installed on the processing table. A first bevel gear is fixed on the rotating rod. A second bevel gear meshed with the first bevel gear is fixed at the end of the second lead screw. A belt connected to the bidirectional lead screw is sleeved on the rotating rod. A guiding component connected to the second lead screw is arranged on the processing table.

[0013] As a further solution of the present invention: The guiding assembly includes a second guiding column fixedly installed on the processing table, and a second guiding sleeve is slidably installed on the second guiding column; It further includes a third threaded sleeve threadedly installed on the second lead screw. A push plate fixedly connected to the second guiding sleeve is fixed on the third threaded sleeve, and the push plate is fixedly connected to the moving table.

[0014] As a further solution of the present invention: The clamping assembly includes a fixed clamping plate and a cylinder fixedly installed on the moving table. An active clamping plate is fixed to the telescopic end of the cylinder, and an active rod slidably connected to the moving table is fixed on the active clamping plate.

[0015] The steel pipe pole processing system includes the above-mentioned steel pipe pole bending machine based on stress retention.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This application can achieve the purpose of gradually reducing the bending radius by adjusting the distance between the two conical discs, so as to ensure that when the steel pipe is bent, the problem of stress concentration will not occur due to excessive bending radius and bending amount. Specifically, after the clamping assembly fixes the steel pipe, the bending mechanism can be used to control the turning plate to abut against the steel pipe, and under the action of the bending mechanism, the turning plate is controlled to rotate around the central axis of the conical disc to bend the steel pipe. After one bending is completed, under the action of the radius adjustment mechanism, the two conical discs move in a direction away from each other, and the positions of the clamping assembly and the turning plate are adaptively adjusted through the bending mechanism and the synchronous translation mechanism to ensure that the steel pipe always maintains a position parallel to the processing table. At this time, the bending radius is reduced, and the steel pipe can be bent again. Repeat the above steps to achieve multiple bendings, and the bending radius is reduced each time to ensure that stress concentration does not occur when the steel pipe is bent.

[0017] Through the mutual cooperation of the fixed clamping plate and the conical disc, the positioning effect can be provided when clamping steel pipes of different sizes, so as to always keep the steel pipe in contact with the conical surface of the conical disc, ensuring that the steel pipe will not be misaligned with the conical disc during subsequent bending, resulting in poor bending accuracy.

[0018] By adjusting the distance between the two conical discs, when the first bending is performed, the bending radius can be in the maximum state, which can not only ensure that the stress generated during bending is small, but also prevent the problem of steel pipe fracture caused by too small bending radius. After the first bending, the bidirectional lead screw can adjust the positions of the conical disc, the turning plate and the clamping assembly to ensure that the steel pipe always remains parallel to the processing table and is always in contact with the conical disc and the turning plate. At the same time, the radius of the next bending can be reduced to achieve the distribution bending method, ensuring that the stress inside the steel pipe has time to redistribute. Moreover, each step of the distributed bending only applies a small amount of deformation to the steel pipe, so that the crystal structure inside the steel pipe has enough time to adapt to the deformation, thereby reducing stress concentration until the required bending radius and angle are reached. The distributed bending can also avoid the problem of steel pipe springback caused by excessive elastic stress generated during steel pipe bending.

[0019] Through the mutual cooperation of the transmission structure, when the bidirectional lead screw rotates, the synchronous displacement of the clamping assembly can be accurately controlled, thereby avoiding the problem of steel pipe position deviation when using a separate drive source to control the displacement of the clamping assembly, so as to ensure the highest bending accuracy of the steel pipe. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an embodiment of a steel pipe rod bending machine based on stress retention.

[0021] Figure 2 It is a schematic structural diagram of another angle in an embodiment of a steel pipe rod bending machine based on stress retention.

[0022] Figure 3 For Figure 2 The enlarged schematic structural diagram of part A in

[0023] Figure 4 It is a schematic connection diagram of the bending mechanism and the radius adjustment mechanism in an embodiment of a steel pipe rod bending machine based on stress retention.

[0024] Figure 5 It is a schematic structural diagram of part of the radius adjustment mechanism in an embodiment of a steel pipe rod bending machine based on stress retention.

[0025] Figure 6 It is a schematic structural diagram of part of the bending mechanism in an embodiment of a steel pipe rod bending machine based on stress retention.

[0026] Figure 7 It is a schematic connection diagram of the clamping assembly and part of the synchronous translation mechanism in an embodiment of a steel pipe rod bending machine based on stress retention.

[0027] Figure 8 It is a schematic structural diagram of the clamping assembly and the moving table in an embodiment of a steel pipe rod bending machine based on stress retention.

[0028] Figure 9 It is an exploded structural schematic diagram of a partial radius adjustment mechanism in an embodiment of a steel pipe pole bending machine based on stress retention.

[0029] Figure 10 It is an exploded structural schematic diagram of a clamping assembly in an embodiment of a steel pipe pole bending machine based on stress retention.

[0030] In the figure: 1, processing table; 2, rotating sleeve; 3, rotating table; 301, chute; 4, worm; 5, worm gear; 6, sliding plate; 7, fixing plate; 8, first motor; 9, first lead screw; 10, first threaded sleeve; 11, connecting plate; 12, first guide post; 13, first guide sleeve; 14, flipping plate; 15, bidirectional lead screw; 16, second threaded sleeve; 17, conical disc; 18, rotating plate; 19, support sleeve; 20, support rod; 21, second motor; 22, guide rail; 23, moving table; 24, fixed clamping plate; 25, cylinder; 26, movable rod; 27, movable clamping plate; 28, belt; 29, rotating rod; 30, first bevel gear; 31, second lead screw; 32, second bevel gear; 33, third threaded sleeve; 34, pushing plate; 35, second guide post; 36, second guide sleeve. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

[0033] Please refer to Figures 1 to 10 , in an embodiment of the present invention, a steel pipe pole bending machine based on stress retention includes: A processing table 1, and a guide rail 22 fixed on the processing table 1, and a moving table 23 is slidably mounted on the guide rail 22; It further includes: A clamping assembly, disposed on the moving table 23, for fixing the steel pipe; The bending mechanism is arranged on the processing table 1. A turning plate 14 is connected to the bending mechanism. A radius adjustment mechanism connected to the bending mechanism is also arranged on the processing table 1. Symmetrically arranged conical discs 17 are connected to the radius adjustment mechanism. The radius adjustment mechanism can adjust the distance between the two conical discs 17 and drive the turning plate 14 to move towards or away from the conical discs 17 through the bending mechanism. The synchronous translation mechanism is arranged on the processing table 1 and connected to the radius adjustment mechanism. The synchronous translation mechanism can control the synchronous movement of the moving table 23 when the radius adjustment mechanism moves.

[0034] Specifically, in the initial state, the distance between the two conical discs 17 is the smallest, so that the radius of the steel pipe during bending is the largest. When bending the steel pipe, the steel pipe can be placed between the clamping components, and the clamping components can perform a clamping action on the steel pipe. At the same time, under the action of the bending mechanism, the turning plate 14 is controlled to move towards the conical discs 17, so that the steel pipe is placed between the conical discs 17 and the turning plate 14. At this time, under the action of the bending mechanism, the turning plate 14 is controlled to rotate around the conical discs 17 to bend the steel pipe. When the bending angle reaches the required bending angle, the turning plate 14 resets. Under the action of the radius adjustment mechanism, the two conical discs 17 are controlled to move away from each other to reduce the bending radius of the steel pipe. At the same time, the radius adjustment mechanism will also control the turning plate 14 to move towards the conical discs 17 through the bending mechanism to ensure that the turning plate 14 always fits the steel pipe. The radius adjustment mechanism will also drive the synchronous translation mechanism to move, so as to control the clamping components to move through the moving table 23 to ensure that the angle between the clamping position and the bending position of the steel pipe does not change. The bending mechanism controls the turning plate 14 to move again to bend the steel pipe again until both the bending angle and the bending radius meet the required requirements. By synchronously adjusting the distance between the conical discs 17 and the turning plate 14, multiple bends can be made on the steel pipe, and the bending radius can be gradually reduced during bending, so as to maintain the stress change generated during the bending of the steel pipe and prevent the steel pipe from rebounding due to elastic stress.

[0035] Please refer to Figure 1 、 Figure 2 、 Figure 7 、 Figure 8 、 Figure 10 The clamping components include a fixed clamping plate 24 fixedly installed on the moving table 23 and a cylinder 25. A movable clamping plate 27 is fixed to the telescopic end of the cylinder 25. A movable rod 26 slidably connected to the moving table 23 is fixed to the movable clamping plate 27.

[0036] It should be noted that the conical disc 17 is arranged in a conical shape, and the included angle between the side line of the conical disc 17 and the bottom plane is 45°. Before bending the steel pipe, the two conical discs 17 are at the end of the stroke in the direction of approaching each other, and the distance between the fixed clamping plate 24 and the movable clamping plate 27 is the largest. The central horizontal plane between the two conical discs 17 coincides with the central horizontal plane of the fixed clamping plate 24. The fixed clamping plate 24 and the movable clamping plate 27 have the same size and shape, and can be divided into two parts, namely the cross plate located in the middle position and the inclined plates symmetrically arranged on both sides of the cross plate. The included angle between the inclined plate and the cross plate is 45°. The width of the cross plate is the same as the distance between the two conical discs 17. Therefore, in the side view direction, the shape formed by the combination of the two conical discs 17 is the same as that of the fixed clamping plate 24 and they are in a mutually coincident state. When the steel pipe abuts against the two conical discs 17 and the fixed clamping plate 24, it will maintain a state parallel to the processing table 1.

[0037] Among them, due to the different sizes of the steel pipes to be bent, when the steel pipe abuts against the fixed clamping plate 24, under the action of the air cylinder 25, the movable clamping plate 27 is driven to move towards the fixed clamping plate 24, and under the guiding action of the movable rod 26, it is ensured that the movable clamping plate 27 will not shift during movement. When the movable clamping plate 27 abuts against the steel pipe, the steel pipe will be fixed between the movable clamping plate 27 and the fixed clamping plate 24. At this time, the central axis of the steel pipe is just located on the central horizontal plane between the two conical discs 17 and abuts against the conical surfaces of the two conical discs 17. Through the mutual cooperation of the fixed clamping plate 24 and the conical disc 17, when clamping steel pipes of different sizes, a positioning effect can be achieved to always keep the steel pipe in contact with the conical surface of the conical disc 17, ensuring that during subsequent bending, the steel pipe will not be misaligned with the conical disc 17, resulting in poor bending accuracy.

[0038] Please refer to Figures 1 to 4 、 Figure 6 As shown in, the radius adjustment mechanism includes a second motor 21 fixedly installed on the processing table 1. A bidirectional lead screw 15 connected to the output shaft of the second motor 21 is rotatably installed on the processing table 1. Symmetrically arranged second threaded sleeves 16 are threadedly connected to the bidirectional lead screw 15. The second threaded sleeves 16 are fixedly connected to the conical discs 17. A driven component is arranged on the second threaded sleeve 16. The driven component includes a rotating plate 18 rotatably installed on the second threaded sleeve 16. A support sleeve 19 is fixed on the rotating plate 18. A support rod 20 is slidably installed in the support sleeve 19.

[0039] Please refer to Figures 1 to 5 、 Figure 9, the bending mechanism includes a worm 4 rotatably installed on the processing table 1. A rotating sleeve 2 sleeved on the bidirectional lead screw 15 is rotatably installed on the processing table 1. A worm gear 5 and a rotating table 3 are fixed on the rotating sleeve 2. The worm 4 meshes with the worm gear 5. A sliding assembly connected to the support rod 20 is arranged on the rotating table 3. The sliding assembly includes symmetrically arranged sliding grooves 301 formed on the rotating table 3. A sliding plate 6 is slidably installed in the sliding groove 301. The sliding plate 6 is fixedly connected to the support rod 20. A fixing plate 7 is fixed on the sliding plate 6. An adjusting structure is arranged on the fixing plate 7. The adjusting structure includes a first motor 8 fixedly installed on the fixing plate 7. A first lead screw 9 connected to the output shaft of the first motor 8 is rotatably installed on the fixing plate 7. A first threaded sleeve 10 is threadedly connected to the first lead screw 9; it further includes a first guiding column 12 fixedly installed on the fixing plate 7. A first guiding sleeve 13 is slidably installed on the first guiding column 12. A connecting plate 11 fixedly connected to the first threaded sleeve 10 is fixed on the first guiding sleeve 13. The connecting plate 11 is fixedly connected to the flipping plate 14.

[0040] Specifically, before bending the steel pipe, the distance between the two second threaded sleeves 16 is the smallest, so that the distance between the two tapered discs 17 is the smallest. After the steel pipe is fixed by the clamping assembly, the contact points of the steel pipe on the tapered surfaces of the two tapered discs 17 are symmetrical to each other, and the distance between the steel pipe and the smaller tapered surface of the tapered disc 17 is the largest. Therefore, the bending radius formed by the combination of the two tapered discs 17 is the largest. The angle between the support sleeve 19 and the bidirectional lead screw 15 is also 45°. Therefore, an isosceles right triangle is formed by the combination of the bidirectional lead screw 15, the support sleeve 19, the support rod 20 and the rotating table 3. Since the distance between the rotating plate 18 and the rotating table 3 is the largest and the dimension of the mutual nesting of the support sleeve 19 and the support rod 20 is the smallest, the sliding plate 6 is at the end of the stroke in the direction away from the bidirectional lead screw 15. Under the action of the first lead screw 9, the first threaded sleeve 10 is at the end of the stroke in the direction away from the tapered disc 17. Under the action of the connecting plate 11, the distance between the flipping plate 14 and the tapered disc 17 is controlled to be the largest.

[0041] When the steel pipe needs to be bent, the steel pipe will pass through the space between the conical disks 17 and the turning plate 14, and be located between the fixed clamping plate 24 and the movable clamping plate 27. Under the action of the clamping assembly, the steel pipe is fixed. At this time, the first motor 8 operates to drive the first lead screw 9 to rotate and control the movement of the first threaded sleeve 10. Thus, through the connecting plate 11, the first guide sleeve 13 is controlled to move along the direction of the first guide post 12. The connecting plate 11 will also drive the turning plate 14 to move towards the steel pipe until the turning plate 14 abuts against the steel pipe. Since the position of the sliding plate 6 in the chute 301 is also locked when the distance between the two conical disks 17 is the smallest, and the first lead screw 9 can adjust the distance between the turning plate 14 and the conical disks 17. Therefore, before bending, the turning plate 14 can adapt to steel pipes of different sizes, which can not only increase the application range of the device, but also ensure that when bending different steel pipes, the turning plate 14 can cooperate with the conical disks 17 smoothly, ensuring that there is no gap between the turning plate 14, the conical disks 17 and the steel pipe, so as to avoid the problem of the bending force provided being offset or weakened.

[0042] Subsequently, the worm 4 can be controlled to rotate by the motor, so as to drive the worm gear 5 to rotate, control the rotation of the rotating sleeve 2, and the rotating sleeve 2 will drive the rotating table 3 to rotate, so as to control the turning plate 14 to rotate around the central axis of the conical disk 17. Under the action of the turning plate 14, the bending action is performed on the steel pipe. When the bending angle reaches the required value, the worm 4 rotates in the reverse direction to reset the turning plate 14. When the turning plate 14 returns to the initial position, the second motor 21 operates and controls the bidirectional lead screw 15 to rotate, thereby controlling the two second threaded sleeves 16 to move away from each other, increasing the distance between the two conical disks 17. At the same time, the second threaded sleeve 16 will also drive the rotating plate 18 to move, so as to drive the sliding plate 6 to slide along the chute 301 through the support sleeve 19 and the support rod 20. Since the length of the right-angled side represented by the rotating plate 18 decreases, the sliding plate 6 will move towards the bidirectional lead screw 15 synchronously, and the displacement of the rotating plate 18 along the length direction of the bidirectional lead screw 15 is equal to the displacement of the sliding plate 6 along the length direction of the chute 301, so as to synchronously control the turning plate 14 to move towards the conical disk 17. When the bidirectional lead screw 15 rotates, it will also drive the moving table 23 to move through the synchronous translation mechanism, and the displacement direction and displacement amount are the same as those of the turning plate 14, so as to adjust the position of the steel pipe through the clamping assembly, ensuring that the steel pipe always abuts against the conical surfaces of the two conical disks 17 and the turning plate 14. At this time, the distance between the steel pipe and the bidirectional lead screw 15 decreases, thereby reducing the bending radius of the steel pipe. The worm 4 rotates again to bend the steel pipe again. Repeat the above steps until the bending is completed.

[0043] Preferably, by adjusting the distance between the two conical discs 17, when the first bending is performed, the bending radius can be in the maximum state, which can not only ensure that the stress generated during bending is small, but also prevent the problem of steel pipe fracture caused by too small bending radius. After the first bending, the bidirectional lead screw 15 can adjust the positions of the conical disc 17, the turning plate 14 and the clamping assembly to ensure that the steel pipe always remains parallel to the processing table 1 and is always in contact with the conical disc 17 and the turning plate 14. At the same time, the bending radius of the next bending can be reduced to ensure that the stress inside the steel pipe has time to redistribute by means of distributed bending. Moreover, each step of the distributed bending only applies a small amount of deformation to the steel pipe, so that the crystal structure inside the steel pipe has enough time to adapt to the deformation, thereby reducing stress concentration until the required bending radius and angle are reached. The distributed bending can also avoid the problem of springback of the steel pipe after bending caused by excessive elastic stress generated during the bending of the steel pipe; Among them, if the bending speed is too fast, the stress inside the steel pipe will not have time to redistribute, resulting in stress concentration. In this application, the worm wheel 5 and the worm 4 are used for transmission. Since the worm wheel 5 and the worm 4 have the effects of high transmission accuracy and slow transmission rate, the bending speed of the steel pipe can be ensured to be slowed down to further avoid the problem of excessive stress generated by bending.

[0044] Please refer to Figure 1 、 Figure 2 、 Figure 7 As shown in, the synchronous translation mechanism includes a rotating rod 29 rotatably installed on the processing table 1 and a second lead screw 31. A first bevel gear 30 is fixed on the rotating rod 29, and a second bevel gear 32 meshing with the first bevel gear 30 is fixed at the end of the second lead screw 31. A belt 28 connected to the bidirectional lead screw 15 is sleeved on the rotating rod 29. A guiding component connected to the second lead screw 31 is arranged on the processing table 1. Among them, the guiding component includes a second guiding column 35 fixedly installed on the processing table 1, and a second guiding sleeve 36 is slidably installed on the second guiding column 35; it also includes a third threaded sleeve 33 threadedly installed on the second lead screw 31. A push plate 34 fixedly connected to the second guiding sleeve 36 is fixed on the third threaded sleeve 33, and the push plate 34 is fixedly connected to the moving table 23.

[0045] Furthermore, the pitch of the second lead screw 31 is the same as that of the bidirectional lead screw 15. Under the action of the belt 28, the transmission ratios of the bidirectional lead screw 15 and the rotating rod 29 are the same, and the transmission ratios of the first bevel gear 30 and the second bevel gear 32 are the same. Therefore, the transmission ratios of the bidirectional lead screw 15 and the second lead screw 31 are the same. When the bidirectional lead screw 15 rotates, it is necessary to synchronously adjust the position of the clamping assembly to ensure that the steel pipe does not shift during bending. Therefore, the bidirectional lead screw 15 will drive the rotating rod 29 to rotate through the belt 28, and then control the second lead screw 31 to rotate synchronously through the first bevel gear 30 and the second bevel gear 32, and the rotation speeds are equal. The second lead screw 31 will drive the third threaded sleeve 33 to move, so as to drive the second guide sleeve 36 to move along the length direction of the second guide post 35 through the push plate 34. Under the action of the push plate 34, the moving table 23 is controlled to move along the length direction of the guide rail 22, and the displacement amount and position are consistent with those of the flipping plate 14, so as to control the steel pipe to always be parallel to the processing table 1 through the clamping assembly and always abut against the conical disc 17 and the flipping plate 14. Through the mutual cooperation of the transmission structure, it is possible to accurately control the synchronous displacement of the clamping assembly when the bidirectional lead screw 15 rotates, thereby avoiding the problem of the steel pipe shifting when using a separate drive source to control the displacement of the clamping assembly, so as to ensure the highest bending accuracy of the steel pipe.

[0046] The steel pipe rod processing system includes the steel pipe rod bending machine based on stress retention described above.

[0047] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. The steel pipe pole bending machine based on stress retention includes: A processing table, and a guide rail fixed on the processing table, on which a moving table is slidably mounted; characterized in that it further comprises: a clamping assembly provided on the moving table for fixing a steel pipe; a bending mechanism provided on the processing table, a turning plate is connected to the bending mechanism, a radius adjustment mechanism connected to the bending mechanism is further provided on the processing table, and conical discs arranged symmetrically are connected to the radius adjustment mechanism. The radius adjustment mechanism can adjust the distance between the two conical discs and drive the turning plate to move towards or away from the conical discs through the bending mechanism; a synchronous translation mechanism is provided on the processing table and connected to the radius adjustment mechanism, and the synchronous translation mechanism can control the synchronous movement of the moving table when the radius adjustment mechanism moves.

2. The steel pipe pole bending machine based on stress holding according to claim 1, wherein, The radius adjustment mechanism comprises a second motor fixedly installed on the processing table, a bidirectional lead screw rotatably installed on the processing table and connected to the output shaft of the second motor, symmetrically arranged second thread sleeves are threadedly connected to the bidirectional lead screw, the second thread sleeves are fixedly connected to the conical discs, and a driven assembly is arranged on the second thread sleeves.

3. The steel pipe pole bending machine based on stress retention according to claim 2, characterized in that, The driven assembly comprises a rotating plate rotatably installed on the second thread sleeve, a support sleeve is fixed on the rotating plate, and a support rod is slidably installed in the support sleeve.

4. The steel pipe pole bending machine based on stress holding according to claim 3, wherein, The bending mechanism comprises a worm rotatably installed on the processing table, a rotating sleeve sleeved on the bidirectional lead screw is rotatably installed on the processing table, a worm gear and a rotating table are fixed on the rotating sleeve, the worm is meshed with the worm gear, and a sliding assembly connected to the support rod is arranged on the rotating table.

5. The steel pipe pole bending machine based on stress holding according to claim 4, characterized in that The sliding assembly comprises symmetrically arranged chutes opened on the rotating table, sliding plates are slidably installed in the chutes, the sliding plates are fixedly connected to the support rods, fixing plates are fixed on the sliding plates, and an adjusting structure is arranged on the fixing plates.

6. The steel pipe pole bending machine based on stress retention according to claim 5, characterized in that The adjusting structure comprises a first motor fixedly installed on the fixing plate, a first lead screw rotatably installed on the fixing plate and connected to the output shaft of the first motor, a first thread sleeve is threadedly connected to the first lead screw; it further comprises a first guiding column fixedly installed on the fixing plate, a first guiding sleeve is slidably installed on the first guiding column, a connecting plate fixedly connected to the first thread sleeve is fixed on the first guiding sleeve, and the connecting plate is fixedly connected to the turning plate.

7. The steel pipe pole bending machine based on stress retention according to claim 2, characterized in that The synchronous translation mechanism comprises a rotating rod and a second lead screw rotatably installed on the processing table, a first bevel gear is fixed on the rotating rod, a second bevel gear meshed with the first bevel gear is fixed at the end of the second lead screw, a belt connected to the bidirectional lead screw is sleeved on the rotating rod, and a guiding component connected to the second lead screw is arranged on the processing table.

8. The steel pipe pole bending machine based on stress holding according to claim 7, characterized in that, The guiding component includes a second guiding column fixedly installed on the processing table, and a second guiding sleeve is slidably installed on the second guiding column; it also includes a third threaded sleeve threadedly installed on the second lead screw, and a push plate fixed to the third threaded sleeve and fixedly connected to the second guiding sleeve is fixed on the third threaded sleeve, and the push plate is fixedly connected to the moving table.

9. The steel pipe pole bending machine based on stress holding according to claim 1, characterized in that The clamping component includes a fixed clamping plate and a cylinder fixedly installed on the moving table, a movable clamping plate is fixed to the telescopic end of the cylinder, and a movable rod slidably connected to the moving table is fixed on the movable clamping plate.

10. Steel pipe pole processing system, characterized in that It includes a steel pipe rod bending machine based on stress retention according to any one of claims 1-9.

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