Steel pipe and rod bending machine and steel pipe and rod processing system based on stress maintenance

Abstract

The present invention relates to the technical field of steel pipe bending, and specifically to a steel pipe rod bending machine and a steel pipe rod processing system based on stress maintenance, comprising: a processing table, and a guide rail fixed on the processing table, a movable table being slidably mounted on the guide rail; a clamping assembly, arranged on the movable table, and used to fix the steel pipe; a bending mechanism, arranged on the processing table, a turning plate being connected to the bending mechanism, and a radius control mechanism connected to the bending mechanism is also provided on the processing table, and a symmetrically arranged conical disk is connected to the radius control mechanism; a synchronous translation mechanism, arranged on the processing table and connected to the radius control mechanism, the synchronous translation mechanism can control the synchronous movement of the movable table when the radius control mechanism moves, and the mutual cooperation of the conical disk and the turning plate can realize step-by-step reduction of the bending amount of the steel pipe to ensure the stress change of the steel pipe during bending.

Description

Technical Field

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

[0002] When a steel pipe is bent under external forces, its outer metal layer is subjected to tensile stress and its inner metal layer is subjected to compressive stress. These two stresses cause the pipe to change shape. The magnitude and distribution of these stresses depend on many factors, including the bend radius, pipe dimensions (diameter and wall thickness), material properties, and bending method.

[0003] A smaller bending radius will lead to increased tensile stress in the outer layer and compressive stress in the inner layer, which can easily cause the steel pipe to rupture or excessive deformation. Parameters such as bending speed, pressure, and angle will affect the bending quality of the steel pipe. Excessive bending speed may lead to stress concentration, excessive pressure may cause excessive deformation or rupture of the steel pipe, and an inaccurate bending angle will affect the 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 adjusting the bending radius, the existing bending machine needs to replace the bending mold, and the replacement of the bending mold will cause the corresponding bending point position to change. This requires corresponding adjustment of the position of the clamping workpiece and the bending workpiece, which makes the entire bending process too complicated and it is difficult to avoid deviations in adjustment accuracy, resulting in poor bending accuracy. Summary of the Invention

[0005] The object of the present invention is to provide a steel pipe and rod bending machine and a steel pipe and rod processing system based on stress retention, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] Steel pipe and rod bending machine based on stress retention, including:

[0008] A processing table, and a guide rail fixed on the processing table, with a moving table slidably mounted on the guide rail;

[0009] Also includes:

[0010] A clamping assembly, arranged on the movable platform, for fixing the steel pipe;

[0011] A bending mechanism is provided on the processing table, the bending mechanism is connected to a flip plate, and the processing table is further provided with a radius control mechanism connected to the bending mechanism, the radius control mechanism is connected to symmetrically arranged conical disks, the radius control mechanism can adjust the distance between the two conical disks, and drive the flip plate to move toward or away from the conical disk through the bending mechanism;

[0012] The synchronous translation mechanism is arranged on the processing table and connected to the radius control mechanism. The synchronous translation mechanism can control the synchronous movement of the movable table when the radius control mechanism moves.

[0013] As a further solution of the present invention: the radius control mechanism includes a second motor fixedly mounted on the processing table, a bidirectional screw connected to the output shaft of the second motor is rotatably mounted on the processing table, a second threaded sleeve symmetrically arranged is threadedly connected to the bidirectional screw, the second threaded sleeve is fixedly connected to the conical disk, and a driven assembly is provided on the second threaded sleeve.

[0014] As a further solution of the present invention: the driven assembly includes a rotating plate rotatably mounted on the second threaded sleeve, a supporting sleeve is fixed to the rotating plate, and a supporting rod is slidably mounted in the supporting sleeve.

[0015] As a further solution of the present invention: the bending mechanism includes a worm rotatably mounted on the processing table, a rotating sleeve rotatably mounted on the processing table and sleeved on the bidirectional screw, a worm wheel and a rotating table are fixed on the rotating sleeve, the worm is engaged with the worm wheel, and a sliding assembly connected to the support rod is provided on the rotating table.

[0016] As a further solution of the present invention: the sliding assembly includes a sliding groove opened on the rotating table and symmetrically arranged, a sliding plate is slidably installed in the sliding groove, the sliding plate is fixedly connected to the support rod, a fixed plate is fixed on the sliding plate, and an adjustment structure is provided on the fixed plate.

[0017] As a further solution of the present invention, the adjustment structure includes a first motor fixedly mounted on a fixed plate, a first screw connected to an output shaft of the first motor is rotatably mounted on the fixed plate, and a first threaded sleeve is threadedly connected to the first screw;

[0018] It also includes a first guide column fixedly mounted on the fixed plate, a first guide sleeve slidably mounted on the first guide column, a connecting plate fixedly connected to the first threaded sleeve fixed on the first guide sleeve, and the connecting plate is fixedly connected to the flip plate.

[0019] As a further solution of the present invention: the synchronous translation mechanism includes a rotating rod and a second screw rod rotatably mounted on the processing table, a first bevel gear is fixed on the rotating rod, a second bevel gear meshing with the first bevel gear is fixed on the end of the second screw rod, a belt connected to the bidirectional screw rod is sleeved on the rotating rod, and a guide assembly connected to the second screw rod is provided on the processing table.

[0020] As a further solution of the present invention: the guide assembly includes a second guide column fixedly mounted on the processing table, and a second guide sleeve is slidably mounted on the second guide column;

[0021] It also includes a third threaded sleeve threadedly mounted on the second screw rod, a push plate fixedly connected to the second guide sleeve is fixed on the third threaded sleeve, and the push plate is fixedly connected to the moving platform.

[0022] As a further solution of the present invention: the clamping assembly includes a fixed clamping plate and a cylinder fixedly mounted on the movable platform, the telescopic end of the cylinder is fixed with a movable clamping plate, and the movable clamping plate is fixed with a movable rod slidably connected to the movable platform.

[0023] A steel pipe and rod processing system includes the stress-maintaining steel pipe and rod bending machine.

[0024] Compared with the prior art, the beneficial effect of the present invention is that the present application can achieve the purpose of gradually reducing the bending radius by adjusting the spacing between the two conical disks, so as to ensure that when the steel pipe is bent, stress concentration problems will not be caused by excessive bending radius and bending amount. Specifically, after the clamping assembly fixes the steel pipe, the bending mechanism can be used to control the flip plate to abut against the steel pipe, and under the action of the bending mechanism, the flip plate is controlled to rotate around the central axis of the conical disk to bend the steel pipe. When one bending is completed, under the action of the radius control mechanism, the two conical disks move in a direction away from each other, and the positions of the clamping assembly and the flip plate are adaptively adjusted through the bending mechanism and the synchronous translation mechanism to ensure that the steel pipe always remains parallel to the processing table. At this time, the bending radius is reduced, and the steel pipe can be bent again. The above steps are repeated to achieve multiple bendings, and the bending radius is reduced each time to ensure that stress concentration problems will not occur when the steel pipe is bent.

[0025] By fixing the clamping plate and the conical disc in cooperation with each other, it is possible to provide a positioning effect when clamping steel pipes of different sizes, so as to always keep the conical surface of the steel pipe in contact with the conical disc, and ensure that during subsequent bending, the steel pipe will not be misaligned with the conical disc, resulting in poor bending accuracy.

[0026] By adjusting the distance between the two conical disks, the bending radius can be maximized during the first bending, which can ensure that the stress generated during bending is small and prevent the steel pipe from breaking due to a too small bending radius. After the first bending, the bidirectional screw can adjust the position of the conical disk, the flip 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 disk and the flip plate. At the same time, the radius of the next bending can be reduced to ensure that the stress inside the steel pipe has time to be redistributed through distributed bending. The step-by-step bending only applies a small amount of deformation to the steel pipe each time, 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. Distributed bending can also avoid the problem of steel pipe rebound after bending due to excessive elastic stress generated during steel pipe bending.

[0027] Through the mutual cooperation of the transmission structure, the synchronous displacement of the clamping assembly can be precisely controlled when the bidirectional screw rotates, thereby avoiding the problem of steel pipe position offset when using a separate drive source to control the displacement of the clamping assembly, thereby ensuring the highest bending accuracy of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an embodiment of a steel pipe and rod bending machine based on stress retention.

[0029] Figure 2 It is a structural schematic diagram of another angle in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0030] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0031] Figure 4 This is a schematic diagram of the connection relationship between the bending mechanism and the radius control mechanism in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0032] Figure 5 It is a structural schematic diagram of part of the radius control mechanism in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0033] Figure 6 It is a structural schematic diagram of part of the bending mechanism in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0034] Figure 7 It is a schematic diagram of the connection relationship between the clamping assembly and the partial synchronous translation mechanism in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0035] Figure 8 It is a structural schematic diagram of the clamping assembly and the moving platform in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0036] Figure 9 Schematic diagram of the exploded structure of part of the radius control mechanism in the embodiment of the steel pipe and rod bending machine based on stress retention.

[0037] Figure 10 Schematic diagram of the exploded structure of the clamping assembly in an embodiment of a steel pipe and rod bending machine based on stress retention.

[0038] In the figure: 1, processing table; 2, rotating sleeve; 3, rotating table; 301, slide; 4, worm; 5, worm gear; 6, sliding plate; 7, fixed plate; 8, first motor; 9, first screw rod; 10, first threaded sleeve; 11, connecting plate; 12, first guide column; 13, first guide sleeve; 14, flip plate; 15, two-way screw rod; 16, second threaded sleeve; 17, tapered disk; 18, rotating plate; 19, supporting sleeve; 20, supporting 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 screw rod; 32, second bevel gear; 33, third threaded sleeve; 34, push plate; 35, second guide column; 36, second guide sleeve DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0041] See also Figures 1 to 10 In an embodiment of the present invention, a steel pipe and rod bending machine based on stress retention includes:

[0042] 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;

[0043] Also includes:

[0044] A clamping assembly, provided on the movable platform 23, for fixing the steel pipe;

[0045] A bending mechanism is provided on the processing table 1, and a flip plate 14 is connected to the bending mechanism. The processing table 1 is also provided with a radius control mechanism connected to the bending mechanism, and the radius control mechanism is connected to symmetrically arranged conical disks 17. The radius control mechanism can adjust the distance between the two conical disks 17 and drive the flip plate 14 to move toward or away from the conical disk 17 through the bending mechanism;

[0046] The synchronous translation mechanism is provided on the processing table 1 and connected to the radius control mechanism. The synchronous translation mechanism can control the synchronous movement of the movable table 23 when the radius control mechanism moves.

[0047] Specifically, in the initial state, the distance between the two conical disks 17 is the smallest, so that the radius of the steel pipe when bending is maximized. 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 flip plate 14 is controlled to move toward the conical disk 17 so that the steel pipe is placed between the conical disk 17 and the flip plate 14. At this time, under the action of the bending mechanism, the flip plate 14 is controlled to rotate around the conical disk 17 to bend the steel pipe. When the bending angle reaches the required bending angle, the flip plate 14 is reset. Under the action of the radius control mechanism, the two conical disks 17 are controlled to move in a direction away from each other to reduce the bending radius of the steel pipe. At the same time, the radius The regulating mechanism will also control the flip plate 14 to move toward the conical disk 17 through the bending mechanism to ensure that the flip plate 14 always remains in contact with the steel pipe. The radius regulating mechanism will also drive the synchronous translation mechanism to move, so as to control the movement of the clamping assembly through the movable platform 23 to ensure that the angle between the clamping point and the bending point of the steel pipe will not change. The bending mechanism will control the movement of the flip plate 14 again to bend the steel pipe again until the bending angle and bending radius meet the required requirements. By synchronously adjusting the distance between the conical disk 17 and the flip plate 14, the steel pipe can be bent multiple times, and the bending radius can be gradually reduced during bending to maintain the stress changes generated when the steel pipe is bent, and prevent elastic stress from causing the steel pipe to rebound after bending.

[0048] See also Figure 1 、 Figure 2 、 Figure 7 、 Figure 8 、 Figure 10 The clamping assembly includes a fixed clamping plate 24 and a cylinder 25 fixedly mounted on the movable platform 23. The telescopic end of the cylinder 25 is fixed with a movable clamping plate 27, and the movable clamping plate 27 is fixed with a movable rod 26 that is slidably connected to the movable platform 23.

[0049] The angle between the side edge of the conical disk 17 and the bottom plane is 45 degrees. Before the steel pipe is bent, the two conical disks 17 are at the end of the stroke in the direction of approaching each other. The distance between the fixed clamping plate 24 and the movable clamping plate 27 is the largest. The center horizontal plane between the two conical disks 17 coincides with the center horizontal plane of the fixed clamping plate 24. The fixed clamping plate 24 and the movable clamping plate 27 are the same in size and shape and can be divided into two parts, namely a horizontal plate located in the middle position and an inclined plate located on both sides of the horizontal plate and symmetrically arranged. The angle between the inclined plate and the horizontal plate is 45 degrees. The width of the horizontal plate is the same as the distance between the two conical disks 17. Therefore, in the side view direction, the shape formed by the combination of the two conical disks 17 is the same as the fixed clamping plate 24 and is in a mutually overlapping state. When the steel pipe abuts against the two conical disks 17 and the fixed clamping plate 24, it will remain parallel to the processing table 1.

[0050] Among them, due to the different sizes of steel pipes to be bent, when the steel pipe abuts against the fixed clamping plate 24, under the action of the cylinder 25, the movable clamping plate 27 is driven to move toward 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 deviate 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 center axis of the steel pipe is just located on the center horizontal plane between the two conical disks 17 and abuts against the conical surfaces of the two conical disks 17. Through the mutual cooperation between the fixed clamping plate 24 and the conical disk 17, a 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 disk 17, ensuring that during subsequent bending, the steel pipe will not be misaligned with the conical disk 17, resulting in poor bending accuracy.

[0051] See also Figure 1-Figure 4 、 Figure 6 The radius control mechanism includes a second motor 21 fixedly mounted on the processing table 1, a bidirectional screw 15 connected to the output shaft of the second motor 21 is rotatably mounted on the processing table 1, a second threaded sleeve 16 symmetrically arranged is threadedly connected to the bidirectional screw 15, the second threaded sleeve 16 is fixedly connected to the conical disk 17, a driven assembly is provided on the second threaded sleeve 16, and the driven assembly includes a rotating plate 18 rotatably mounted on the second threaded sleeve 16, a support sleeve 19 is fixed on the rotating plate 18, and a support rod 20 is slidably mounted in the support sleeve 19.

[0052] See also Figure 1-Figure 5 、 Figure 9The bending mechanism includes a worm 4 rotatably mounted on the processing table 1, a rotating sleeve 2 sleeved on the bidirectional screw 15 is rotatably mounted on the processing table 1, a worm gear 5 and a rotating table 3 are fixed on the rotating sleeve 2, the worm 4 is engaged with the worm gear 5, and a sliding assembly connected to the support rod 20 is provided on the rotating table 3, the sliding assembly includes a slide groove 301 symmetrically arranged on the rotating table 3, a sliding plate 6 is slidably mounted in the slide groove 301, the sliding plate 6 is fixedly connected to the support rod 20, and a fixed plate 7 is fixed on the sliding plate 6. , an adjustment structure is provided on the fixed plate 7, and the adjustment structure includes a first motor 8 fixedly mounted on the fixed plate 7, a first screw rod 9 connected to the output shaft of the first motor 8 is rotatably mounted on the fixed plate 7, and a first threaded sleeve 10 is threadedly connected to the first screw rod 9; it also includes a first guide column 12 fixedly mounted on the fixed plate 7, a first guide sleeve 13 is slidably mounted on the first guide column 12, a connecting plate 11 fixedly connected to the first threaded sleeve 10 is fixed on the first guide sleeve 13, and the connecting plate 11 is fixedly connected to the flip plate 14.

[0053] In detail, before the steel pipe is bent, the distance between the two second threaded sleeves 16 is the smallest, so that the distance between the two tapered disks 17 is the smallest. After the steel pipe is fixed by the clamping assembly, the contact points of the steel pipe on the conical surfaces of the two tapered disks 17 are symmetrical with each other, and the distance between the steel pipe and the smaller conical surface of the tapered disk 17 is the largest. Therefore, the bending radius formed by the combination of the two tapered disks 17 is the largest, and the angle between the support sleeve 19 and the bidirectional screw 15 is also 45°. Therefore, the bidirectional screw 15, the support sleeve 19, the support rod 20 and the rotary table 3 form an equilateral right triangle shape. Since the distance between the rotating plate 18 and the rotary table 3 is the largest, the size of the mutual fit between the support sleeve 19 and the support rod 20 is the smallest. Therefore, the sliding plate 6 is located at the end of the stroke away from the bidirectional screw 15, and under the action of the first screw 9, the first threaded sleeve 10 is located at the end of the stroke away from the tapered disk 17. Under the action of the connecting plate 11, the distance between the flip plate 14 and the tapered disk 17 is controlled to be the largest.

[0054] When the steel pipe needs to be bent, the steel pipe will pass between the conical disk 17 and the flip 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 works, drives the first screw rod 9 to rotate, and controls the movement of the first threaded sleeve 10, thereby controlling the first guide sleeve 13 to move along the direction of the first guide column 12 through the connecting plate 11. The connecting plate 11 also drives the flip plate 14 to move toward the steel pipe until the flip plate 14 abuts against the steel pipe. When the distance between the conical disks 17 is the smallest, the position of the sliding plate 6 in the slide groove 301 is also in a locked state, and the first screw rod 9 can adjust the distance between the flip plate 14 and the conical disk 17, so that before bending, the flip plate 14 can adapt to steel pipes of different sizes, which can not only increase the scope of application of the device, but also ensure that when bending different steel pipes, the flip plate 14 can smoothly cooperate with the conical disk 17 to ensure that there is no gap between the flip plate 14 and the conical disk 17 and the steel pipe, which will cause the bending force provided to be offset or weakened.

[0055] Subsequently, the worm 4 can be controlled to rotate by the motor, thereby driving the worm wheel 5 to rotate, so as to control the rotation of the rotating sleeve 2. The rotating sleeve 2 will drive the rotary table 3 to rotate, so as to control the flip plate 14 to rotate around the central axis of the conical disk 17. Under the action of the flip plate 14, the steel pipe is bent. When the bending angle reaches the required requirement, the worm 4 is reversed to reset the flip plate 14. When the flip plate 14 returns to the initial position, the second motor 21 works and controls the two-way screw 15 to rotate, thereby controlling the two second threaded sleeves 16 to move in the direction away from each other, so that the distance between the two conical disks 17 increases. 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 slide groove 301 through the support sleeve 19 and the support rod 20. As the length of the right-angled side represented by the rotating plate 18 decreases, the sliding plate 6 will move synchronously toward the direction of the bidirectional screw rod 15, and the displacement of the rotating plate 18 along the length direction of the bidirectional screw rod 15 is equal to the displacement of the sliding plate 6 along the length direction of the slide groove 301, thereby synchronously controlling the flip plate 14 to move toward the conical disk 17. When the bidirectional screw rod 15 rotates, it will also drive the moving platform 23 to move through the synchronous translation mechanism, and the displacement direction is the same as that of the flip plate 14, so that the position of the steel pipe is adjusted by the clamping assembly to ensure that the steel pipe is always in contact with the conical surface of the two conical disks 17 and the flip plate 14. At this time, the distance between the steel pipe and the bidirectional screw rod 15 is reduced, thereby reducing the bending radius of the steel pipe, and the worm 4 rotates again to bend the steel pipe again, and repeat the above steps until the bending is completed.

[0056] Preferably, by adjusting the spacing between the two conical disks 17, the bending radius can be maximized during the first bending, which can ensure that the stress generated during bending is small and prevent the steel pipe from breaking due to an excessively small bending radius. After the first bending, the bidirectional screw 15 can ensure that the steel pipe always remains parallel to the processing table 1 and is always in contact with the conical disk 17 and the flip plate 14 by adjusting the position of the clamping assembly. At the same time, the radius of the next bending can be reduced to ensure that the stress inside the steel pipe has time to be redistributed through distributed bending. The step-by-step bending only applies a small amount of deformation to the steel pipe each time, so that the crystal structure inside the steel pipe has enough time to adapt to the deformation, thereby reducing stress concentration until the desired bending radius and angle are reached. Distributed bending can also avoid the problem of steel pipe rebound after bending due to excessive elastic stress generated during bending.

[0057] Among them, if the bending speed is too fast, the stress inside the steel pipe will not have time to be redistributed, which will cause stress concentration. The present application uses the worm gear 5 and the worm 4 for transmission. Since the worm gear 5 and the worm 4 have high transmission accuracy and slow transmission speed, it can ensure that the bending rate of the steel pipe is slowed down to further avoid the problem of excessive stress caused by bending.

[0058] See also Figure 1 、 Figure 2 、 Figure 7 The synchronous translation mechanism includes a rotating rod 29 and a second screw rod 31 rotatably mounted on the processing table 1, 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 screw rod 31, a belt 28 connected to the bidirectional screw rod 15 is sleeved on the rotating rod 29, and a guide assembly connected to the second screw rod 31 is provided on the processing table 1, wherein the guide assembly includes a second guide column 35 fixedly mounted on the processing table 1, and a second guide sleeve 36 is slidably mounted on the second guide column 35; it also includes a third threaded sleeve 33 threadedly mounted on the second screw rod 31, and a push plate 34 fixedly connected to the second guide sleeve 36 is fixed on the third threaded sleeve 33, and the push plate 34 is fixedly connected to the movable table 23.

[0059] Furthermore, the second screw rod 31 has the same pitch as the bidirectional screw rod 15. Under the action of the belt 28, the transmission ratio of the bidirectional screw rod 15 and the rotating rod 29 is the same, and the transmission ratio of the first bevel gear 30 and the second bevel gear 32 is the same. Therefore, the transmission ratio of the bidirectional screw rod 15 and the second screw rod 31 is the same. When the bidirectional screw rod 15 rotates, it is necessary to synchronously adjust the position of the clamping assembly to ensure that the steel pipe does not deviate when bending. Therefore, the bidirectional screw rod 15 will drive the rotating rod 29 to rotate through the belt 28, thereby controlling the synchronous rotation of the second screw rod 31 through the first bevel gear 30 and the second bevel gear 32, and the rotation rate is equal. The second screw rod 31 will drive the third screw rod 31 to rotate. The grooved sleeve 33 moves to drive the second guide sleeve 36 to move along the length direction of the second guide column 35 through the push plate 34. Under the action of the push plate 34, the movable table 23 is controlled to move along the length direction of the guide rail 22, and is consistent with the displacement amount and position direction of the flip plate 14, so that the steel pipe is controlled by the clamping assembly to always maintain a parallel position with the processing table 1, and always abut against the conical disk 17 and the flip plate 14. Through the mutual cooperation of the transmission structure, the synchronous displacement of the clamping assembly can be accurately controlled when the bidirectional screw 15 rotates, thereby avoiding the problem of steel pipe position offset 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.

[0060] A steel pipe and rod processing system includes the stress-maintaining steel pipe and rod bending machine.

[0061] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0062] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Steel pipe and rod bending machine based on stress retention, including: A processing table, and a guide rail fixed on the processing table, with a moving table slidably mounted on the guide rail; It is characterized by further comprising: A clamping assembly, arranged on the movable platform, for fixing the steel pipe; A bending mechanism is provided on the processing table, the bending mechanism is connected to a flip plate, and the processing table is further provided with a radius control mechanism connected to the bending mechanism, the radius control mechanism is connected to symmetrically arranged conical disks, the radius control mechanism can adjust the distance between the two conical disks, and drive the flip plate to move toward or away from the conical disk through the bending mechanism; Under the action of the bending mechanism, the flip plate is controlled to rotate around the conical disk to bend the steel pipe. When the bending angle reaches the required bending angle, the flip plate is reset. Under the action of the radius control mechanism, the two conical disks are controlled to move away from each other to reduce the bending radius of the steel pipe. The angle between the side line of the conical disk and the bottom plane is 45°; a synchronous translation mechanism, disposed on the processing table and connected to the radius control mechanism, wherein the synchronous translation mechanism can control the synchronous movement of the movable table when the radius control mechanism moves; The radius control mechanism includes a second motor fixedly mounted on the processing table, a bidirectional screw connected to the output shaft of the second motor is rotatably mounted on the processing table, a second threaded sleeve symmetrically arranged is threadedly connected to the bidirectional screw, the second threaded sleeve is fixedly connected to the tapered disk, and a driven assembly is provided on the second threaded sleeve; The driven assembly includes a rotating plate rotatably mounted on the second threaded sleeve, a supporting sleeve is fixed to the rotating plate, and a supporting rod is slidably mounted in the supporting sleeve; The included angle between the support sleeve and the bidirectional screw is 45°, and the bidirectional screw, the support sleeve, the support rod and the rotary table are combined to form an equilateral right triangle shape; The synchronous translation mechanism includes a rotating rod and a second screw rod rotatably mounted on the processing table, a first bevel gear is fixed on the rotating rod, a second bevel gear meshing with the first bevel gear is fixed at the end of the second screw rod, a belt connected to the bidirectional screw rod is sleeved on the rotating rod, and a guide assembly connected to the second screw rod is provided on the processing table; The second lead screw has the same pitch as the bidirectional lead screw, and the first bevel gear and the second bevel gear have the same transmission ratio.

2. The steel pipe and rod bending machine based on stress retention according to claim 1, characterized in that: The bending mechanism includes a worm rotatably mounted on the processing table, a rotating sleeve rotatably mounted on the processing table and sleeved on the bidirectional screw, a worm wheel and a rotating table are fixed on the rotating sleeve, the worm is engaged with the worm wheel, and a sliding assembly connected to the support rod is provided on the rotating table.

3. The steel pipe and rod bending machine based on stress retention according to claim 2, characterized in that: The sliding assembly includes a sliding groove that is opened on the rotating platform and is symmetrically arranged. A sliding plate is slidably installed in the sliding groove. The sliding plate is fixedly connected to the support rod. A fixed plate is fixed on the sliding plate, and an adjustment structure is provided on the fixed plate.

4. The steel pipe and rod bending machine based on stress retention according to claim 3, characterized in that: The adjustment structure includes a first motor fixedly mounted on a fixed plate, a first screw connected to an output shaft of the first motor is rotatably mounted on the fixed plate, and a first threaded sleeve is threadedly connected to the first screw; It also includes a first guide column fixedly mounted on the fixed plate, a first guide sleeve slidably mounted on the first guide column, a connecting plate fixedly connected to the first threaded sleeve fixed on the first guide sleeve, and the connecting plate is fixedly connected to the flip plate.

5. The steel pipe and rod bending machine based on stress retention according to claim 1, characterized in that: The guide assembly includes a second guide column fixedly mounted on the processing table, and a second guide sleeve is slidably mounted on the second guide column; It also includes a third threaded sleeve threadedly mounted on the second screw rod, a push plate fixedly connected to the second guide sleeve is fixed on the third threaded sleeve, and the push plate is fixedly connected to the moving platform.

6. The steel pipe and rod bending machine based on stress retention according to claim 1, characterized in that: The clamping assembly includes a fixed clamping plate and a cylinder fixedly mounted on the movable platform. The telescopic end of the cylinder is fixed with a movable clamping plate, and the movable clamping plate is fixed with a movable rod slidably connected to the movable platform.

7. Steel pipe rod processing system, characterized in that, It includes a steel pipe and rod bending machine based on stress retention as described in any one of claims 1-6.

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