Three-station special pipe bending machine

Abstract

The application discloses a three-station special-shaped pipe bending machine and relates to the technical field of pipe bending.The three-station special-shaped pipe bending machine comprises a pipe bending base and a conveying motor fixedly connected to the top of the pipe bending base, the output end of the conveying motor is fixedly connected with a conveying roller, the top of the pipe bending base close to the conveying motor is fixedly connected with a fixed plate, one side of the fixed plate is connected with a fixed roller through bolts, the top of the pipe bending base close to the fixed plate is fixedly connected with a bending base, and the top of the bending base is slidably connected with a bending roller.The flexible support plate can be kept adhered to the inside of the special-shaped pipe material, so that the inside of the special-shaped pipe material is filled to support the inner wall of the special-shaped pipe material.The support structure fills the inside space of the special-shaped pipe material to offset the unbalanced effect of the outside tensile stress and the inside compressive stress, avoids the problems of wrinkles, depressions and excessive ovality of the special-shaped pipe material, and prevents the cross section from being distorted due to uneven stress.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe bending, in particular to a three-station special-shaped pipe bending machine. BACKGROUND

[0002] The three-station special-shaped pipe bending machine is an automatic device specially used for processing complex-shaped metal pipes, and its core feature is that three stations cooperate together to efficiently complete the bending forming of special-shaped pipes. The core function of the special-shaped pipe bending machine is to bend metal pipes into complex three-dimensional shapes to meet the customized needs of different industries. Its functions are not limited to simple pipe bending, but also include high-precision control, multi-angle composite bending, and automation production.

[0003] According to the announcement number "CN109127805B" disclosed by China Patent Network, a special-shaped pipe bending machine for air conditioners and its operation method are disclosed. The special-shaped pipe bending machine includes a plurality of first-stage pipe bending assembly, second-stage pipe bending assembly and pipe support assembly arranged in parallel and at intervals. The first-stage pipe bending assembly and the second-stage pipe bending assembly are arranged on a fixed frame. The first-stage pipe bending assembly and the second-stage pipe bending assembly are provided with a pressure sensor, an ultrasonic flaw detector and a laser three-dimensional scanner. The pressure sensor, the ultrasonic flaw detector and the laser three-dimensional scanner are connected to a central processing unit. The operation method is also disclosed. The special-shaped pipe bending machine for air conditioners can greatly improve the bending precision of special-shaped pipes by using the first-stage pipe bending assembly, the second-stage pipe bending assembly and the pipe support assembly to pull and bend the pipes. It can expand more special-shaped products.

[0004] Although the above-mentioned patent can improve the bending precision of special-shaped pipes, when the special-shaped pipes are bent, the internal bending parts of the special-shaped pipes will cause uneven tension stress on the outside and compression stress on the inside due to bending, which will cause wrinkles, depressions and other problems on the inner wall of the special-shaped pipes, affecting the bending quality of the special-shaped pipes. SUMMARY

[0005] The present application aims to solve the problem of uneven tension stress on the outside and compression stress on the inside of the internal bending parts of the special-shaped pipes due to bending, which will cause wrinkles, depressions and other problems on the inner wall of the special-shaped pipes, and provides a three-station special-shaped pipe bending machine.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a three-station special-shaped pipe bending machine, comprising:

[0007] The utility model relates to a bending pipe base and conveying motor fixedly connected at the top of the bending pipe base, the output end of the conveying motor is fixedly connected with conveying roller, the top of the bending pipe base close to the conveying motor is fixedly connected with fixed plate, one side of the fixed plate is connected with fixed roller through bolt, the top of the bending pipe base close to the fixed plate is fixedly connected with bending base, the top of the bending base is slidably connected with bending roller, one side of the bending roller is slidably connected with special-shaped pipe material, one side of the fixed plate is fixedly connected with connecting plate, one side of the connecting plate is provided with mounting mechanism and support mechanism, the inside of the special-shaped pipe material is provided with synchronous mechanism and recovery mechanism.

[0008] As a further scheme of the utility model: the mounting mechanism includes hydraulic base fixedly connected at one side of the connecting plate, and the top of the hydraulic base is fixedly connected with hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected with connecting disc, and one side of the connecting disc is fixedly connected with four steel wires.

[0009] As a further scheme of the utility model: the mounting mechanism further includes a plurality of groups of flexible support plates slidably connected at the outer wall of the steel wire, the inner side of each group of the flexible support plates is fixedly connected with sliding support plate respectively, and the both sides of the sliding support plate are fixedly connected with sliding plate respectively, the other side of the sliding plate is fixedly connected with sliding limiting plate, the outer wall of the sliding support plate is slidably connected with mounting plate, the both sides of the mounting plate are fixedly connected with chain plate, and every two chain plates are rotatably connected through chain rod, the other end of the chain plate is rotatably connected with core plate through chain rod, and the core plate is fixedly connected at the inner side of the connecting plate.

[0010] As a further scheme of the utility model: the support mechanism includes two pad plates symmetrically installed at the inner side of the flexible support plate, and the other side of one side pad plate is symmetrically installed with sliding pipe, the other side of the other side pad plate is symmetrically installed with sliding rod, and the outer wall of the sliding rod is slidably connected with the inner wall of the sliding pipe.

[0011] As a further scheme of the utility model: the support mechanism further includes support frame fixedly connected at the inner side of the sliding support plate, and two limiting rods are symmetrically installed at one side of the support frame, the inner side of the mounting plate is fixedly connected with rebound rod, and one end of the rebound rod penetrates through the support frame and extends to the inner side of the sliding support plate, the outer wall of the rebound rod is provided with rebound spring, and the rebound spring is installed between the support frame and the mounting plate.

[0012] As a further scheme of the utility model: the synchronous mechanism includes synchronous connecting rope fixedly connected at one side of the steel wire, and the other end of the synchronous connecting rope is fixedly connected with synchronous sliding plate, the top of the synchronous sliding plate is fixedly connected with synchronous limiting plate, and the synchronous sliding plate is installed with recovery spring between the mounting plate.

[0013] As a further further scheme of the present application: the synchronous mechanism further comprises two synchronous grooves symmetrically provided on one side of the flexible support plate and matched with the synchronous connecting ropes, and the two synchronous grooves provided on one side are arranged one above the other, and the synchronous grooves are rotatably connected with pulleys inside the synchronous connecting ropes.

[0014] As a further further scheme of the present application: the recovery mechanism comprises a recovery inclined plate slidably connected to the outer wall of the front end of the steel wire rope, and a recovery seat fixedly connected to one side of the recovery inclined plate, and a recovery connecting seat fixedly connected to one side of the recovery seat, and the other side of the recovery connecting seat is rotatably connected with a chain plate through a chain link.

[0015] As a further further scheme of the present application: the recovery mechanism further comprises a recovery motor fixedly connected to the inside of the recovery connecting seat, and a recovery threaded rod fixedly connected to the output end of the recovery motor, and a recovery threaded tube threadedly connected to the outer wall of the recovery threaded rod, and a recovery moving rod fixedly connected to one end of the recovery threaded tube, and recovery rollers fixedly connected to both ends of the recovery moving rod, and a recovery pull rope slidably connected to the outer wall of the recovery rollers, and both ends of the recovery pull rope are fixedly connected with the other ends of the two steel wire ropes respectively, and a recovery groove matched with the recovery moving rod is arranged in the inside of the recovery seat.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. By setting the mounting mechanism, the flexible support plate is of flexible material and can slightly deform with the bending of the profiled pipe. A plurality of flexible support plates are arranged inside the bending part of the profiled pipe. When the bending roller bends the profiled pipe, the bending part causes the flexible support plate to move linearly inward. The linearly moving flexible support plate drives the sliding support plate to move linearly inside the mounting plate. The linearly moving sliding support plate can keep the flexible support plate adhered to the inside of the profiled pipe through the elastic action of the rebound spring, thereby ensuring that the profiled pipe is filled inside to support the inner wall of the profiled pipe. The support structure offsets the unbalanced effect of the external tensile stress and the internal compressive stress by filling the space inside the profiled pipe, thereby avoiding problems such as wrinkles, depressions, and excessive ovality of the profiled pipe, and preventing the cross section from being distorted due to uneven stress.

[0018] 2. By setting the steel wire rope and the hydraulic cylinder, the hydraulic cylinder can be started before the profiled pipe is installed. The hydraulic cylinder can drive the connecting disc to move linearly. The linearly moving connecting disc drives the steel wire rope to move linearly. The linearly moving steel wire rope can drive the flexible support plates to be arranged in a straight line after being straightened, thereby facilitating the profiled pipe to be fitted into the support mechanism and avoiding the increase of the installation time of the profiled pipe due to the deflection between the flexible support plates.

[0019] 3、Through the setting support mechanism, when the flexible support plate deforms, the deformed flexible support plate can drive the steel wire rope to move linearly to the recovery inclined plate direction, the linearly moving steel wire rope drives the synchronous connecting rope to move linearly, the linearly moving synchronous connecting rope drives the synchronous sliding plate to move linearly through the pulley, the linearly moving synchronous sliding plate drives the synchronous limiting plate to move linearly, the linearly moving synchronous limiting plate can limit the moving distance of the linearly moving sliding support plate, so that the moving distance of the sliding support plate changes with the bending angle of the special-shaped pipe, so that the flexible support plate can always support the inner wall of the special-shaped pipe;

[0020] 4、Through the setting recovery mechanism, after the bending is completed, the recovery motor drives the recovery screw rod to rotate, the rotating recovery screw rod drives the recovery screw pipe to move linearly through the screw thread action and the limiting action of the recovery moving rod, the linearly moving recovery screw pipe drives the recovery moving rod to move linearly, the linearly moving recovery moving rod drives the recovery roller to move linearly, the linearly moving recovery roller drives the steel wire rope to move linearly through the recovery pull rope, so as to relax the tension of the steel wire rope on the synchronous connecting rope, at this time, the synchronous sliding plate can be reset under the elastic action of the recovery spring, and the synchronous limiting plate can be removed from the limitation of the sliding support plate, so that the flexible support plate does not need to be attached to the inner wall of the special-shaped pipe, finally, the damage of the flexible support plate to the special-shaped pipe is avoided, and the bending quality of the special-shaped pipe is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of the present application;

[0022] Figure 2 It is a special-shaped pipe internal structure sectional view of the present application;

[0023] Figure 3 It is a special-shaped pipe internal structure schematic view of the present application;

[0024] Figure 4 It is a support structure schematic view of the present application;

[0025] Figure 5 It is a mounting mechanism partial structure schematic view of the present application;

[0026] Figure 6 It is a support mechanism structure sectional view of the present application;

[0027] Figure 7 It is a structure enlarged view of A in the present application Figure 6

[0028] Figure 8 It is a synchronous mechanism partial structure sectional view of the present application;

[0029] Figure 9 It is a support mechanism partial structure schematic view of the present application;​

[0030] Figure 10 Structure of the supporting mechanism of the application;

[0031] Figure 11 Structure of the supporting mechanism of the application;

[0032] In the figure: 1, bending pipe base; 2, conveying motor; 3, fixed plate; 4, bending base; 5, profiled pipe; 6, hydraulic base; 7, hydraulic cylinder; 8, connecting plate; 9, connecting disc; 10, steel wire rope; 11, flexible support plate; 12, cushion plate; 13, sliding pipe; 14, sliding rod; 15, sliding support plate; 16, mounting plate; 17, chain plate; 18, chain rod; 19, core plate; 20, sliding plate; 21, sliding limiting plate; 22, support frame; 23, limiting rod; 24, rebound rod; 25, rebound spring; 26, pulley; 27, synchronous connecting rope; 28, synchronous sliding plate; 29, synchronous limiting plate; 30, recovery spring; 31, recovery inclined plate; 32, recovery seat; 33, recovery connecting seat; 34, recovery motor; 35, recovery threaded rod; 36, recovery threaded pipe; 37, recovery moving rod; 38, recovery roller; 39, recovery pull rope; 40, conveying roller; 41, fixed roller; 42, bending roller. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the bending pipe technical field without creative labor fall within the protection scope of the application.

[0034] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "providing" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art of bending pipe technology, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments will be described below according to the overall structure of the present application.

[0035] Please refer to Figures 1 to 2 The present embodiment provides a three-station special-shaped pipe bending machine, a pipe bending base 1 and a conveying motor 2 fixedly connected to the top of the pipe bending base 1, the output end of the conveying motor 2 is fixedly connected with a conveying roller 40, the top of the pipe bending base 1 close to the conveying motor 2 is fixedly connected with a fixed plate 3, one side of the fixed plate 3 is connected with a fixed roller 41 through a bolt, the top of the pipe bending base 1 close to the fixed plate 3 is fixedly connected with a bending base 4, the top of the bending base 4 is slidingly connected with a bending roller 42, one side of the bending roller 42 is slidingly connected with a special-shaped pipe 5, one side of the fixed plate 3 is fixedly connected with a connecting plate 8, one side of the connecting plate 8 is provided with a mounting mechanism and a supporting mechanism, the inside of the special-shaped pipe 5 is provided with a synchronous mechanism and a recycling mechanism.

[0036] Start the conveying motor 2, the conveying motor 2 drives the conveying roller 40 to rotate, the conveying roller 40 rotates to drive the special-shaped pipe 5 to move linearly, the fixed roller 41 can limit the movement of the special-shaped pipe 5 during the linear movement of the special-shaped pipe 5, and the bending roller 42 can perform pipe bending operation on the special-shaped pipe 5 at the position where the special-shaped pipe 5 needs to be bent, and through the synchronous operation of the three stations, the pipe bending operation on the special-shaped pipe 5 can be completed;

[0037] Please refer to Figures 1 to 3 In the process of implementing the above technology, it is found that when the special-shaped pipe 5 is subjected to pipe bending operation, the bending part will cause unevenness between the outside tensile stress and the inside compressive stress due to bending, thereby causing the special-shaped pipe 5 to wrinkle, sag and other problems, affecting the pipe bending quality of the special-shaped pipe 5, and based on this problem, the following technical improvement is made:

[0038] The mounting mechanism further comprises a plurality of groups of flexible support plates 11 slidably connected to the outer wall of the steel wire rope 10, the inner side of each group of flexible support plates 11 is fixedly connected with a sliding support plate 15 respectively, the two sides of the sliding support plate 15 are fixedly connected with a sliding plate 20 respectively, the other side of the sliding plate 20 is fixedly connected with a sliding limiting plate 21, and the outer wall of the sliding support plate 15 is slidably connected with a mounting plate 16, the two sides of the mounting plate 16 are fixedly connected with a chain plate 17, and every two chain plates 17 are rotatably connected through a chain rod 18, the other end of the chain plate 17 is rotatably connected with a core plate 19 through the chain rod 18, and the core plate 19 is fixedly connected to the inner side of the connecting plate 8.

[0039] The flexible support plate 11 is made of flexible material and can slightly deform when the profiled pipe 5 is bent. The plurality of groups of flexible support plates 11 are arranged inside the bending part of the profiled pipe 5. When the profiled pipe 5 is bent by the bending roller 42, the bending part causes the flexible support plates 11 to move linearly inward. The linearly moving flexible support plates 11 drive the sliding support plates 15 to move linearly inside the mounting plate 16. The linearly moving sliding support plates 15 can keep the flexible support plates 11 adhered to the inside of the profiled pipe 5 through the elastic effect of the rebound spring 25, thereby ensuring that the profiled pipe 5 is supported by the filling inside the profiled pipe 5. The support structure offsets the imbalance between the external tensile stress and the internal compressive stress by filling the space inside the profiled pipe 5, thereby preventing the profiled pipe 5 from wrinkling, sagging, or having excessive ovality, and preventing the cross section from being distorted due to uneven stress.

[0040] Please refer to Figures 3 to 4 In the process of implementing the above technology, it is found that when the profiled pipe 5 is sleeved into the support mechanism, the flexible support plates 11 will naturally deflect due to the action of the chain plate 17 and the chain rod 18, affecting the normal installation of the profiled pipe 5. Based on this problem, the following technical improvement is made:

[0041] The mounting mechanism comprises a hydraulic base 6 fixedly connected to one side of the connecting plate 8, and a hydraulic cylinder 7 fixedly connected to the top of the hydraulic base 6, and four steel wire ropes 10 fixedly connected to one side of the connecting disc 9 fixedly connected to the output end of the hydraulic cylinder 7.

[0042] Before installing the profiled pipe 5, the hydraulic cylinder 7 is started, which can drive the connecting disc 9 to move linearly, and the linearly moving connecting disc 9 drives the steel wire rope 10 to move linearly. After the linearly moving steel wire rope 10 is straightened, it can drive the flexible support plates 11 to form a straight line, thereby facilitating the profiled pipe 5 to be sleeved into the support mechanism and avoiding the increase of the installation time of the profiled pipe 5 due to the deflection of the flexible support plates 11.

[0043] Please refer to Figures 4 to 9In the process of implementing the above technology, it is found that when the special-shaped pipe 5 is bent, the bending part of the special-shaped pipe 5 will be subjected to axial compression force with the bending angle, and the internal material will flow to the neutral axis, resulting in increased wall thickness and contracted internal cavity, which will affect the support of the flexible support plate 11 to the inner wall of the special-shaped pipe 5 and affect the bending quality of the pipe. On the basis of this problem, the following technical improvement is made:

[0044] The support mechanism further comprises a support frame 22 fixedly connected to the inner side of the sliding support plate 15, and two limiting rods 23 are symmetrically installed on one side of the support frame 22. The inner side of the mounting plate 16 is fixedly connected with a rebound rod 24, one end of the rebound rod 24 penetrates through the support frame 22 and extends to the inner side of the sliding support plate 15, and a rebound spring 25 is arranged on the outer wall of the rebound rod 24. The rebound spring 25 is installed between the support frame 22 and the mounting plate 16. The synchronous mechanism comprises a synchronous connecting rope 27 fixedly connected to one side of the steel wire rope 10, and the other end of the synchronous connecting rope 27 is fixedly connected with a synchronous sliding plate 28. The top of the synchronous sliding plate 28 is fixedly connected with a synchronous limiting plate 29. A recovery spring 30 is installed between the synchronous sliding plate 28 and the mounting plate 16. The synchronous mechanism further comprises two synchronous grooves symmetrically opened on one side of the flexible support plate 11 and matched with the synchronous connecting rope 27. The two synchronous grooves arranged on one side are arranged one above the other, and the synchronous grooves are rotatably connected with pulleys 26 near the inner side of the synchronous connecting rope 27.

[0045] When the flexible support plate 11 deforms, the deformed flexible support plate 11 can drive the steel wire rope 10 to move linearly in the direction of the recovery inclined plate 31. The linearly moving steel wire rope 10 drives the synchronous connecting rope 27 to move linearly, and the linearly moving synchronous connecting rope 27 drives the synchronous sliding plate 28 to move linearly through the pulley 26. The linearly moving synchronous sliding plate 28 drives the synchronous limiting plate 29 to move linearly, and the linearly moving synchronous limiting plate 29 can limit the movement distance of the linearly moving sliding support plate 15. The movement distance of the sliding support plate 15 can change with the bending angle of the special-shaped pipe 5, so that the support of the flexible support plate 11 to the inner wall of the special-shaped pipe 5 is always guaranteed.

[0046] Please refer to Figures 9 to 11 In the process of implementing the above technology, it is found that after the special-shaped pipe 5 is bent, the flexible support plate 11 is attached to the inside of the special-shaped pipe 5, which will cause the special-shaped pipe 5 to limit the flexible support plate 11 when the support mechanism is pulled out, affecting the pulling out of the support mechanism. Forced pulling out will cause damage to the inside of the special-shaped pipe 5 and affect the bending quality of the special-shaped pipe 5. On the basis of this problem, the following technical improvement is made:

[0047] The recovery mechanism comprises a recovery inclined plate 31 slidably connected to the outer wall of the front end of the steel wire rope 10, one side of the recovery inclined plate 31 is fixedly connected with a recovery seat 32, one side of the recovery seat 32 is fixedly connected with a recovery connecting seat 33, the other side of the recovery connecting seat 33 is rotatably connected with the chain plate 17 through the chain link 18, the recovery mechanism further comprises a recovery motor 34 fixedly connected to the inside of the recovery connecting seat 33, the output end of the recovery motor 34 is fixedly connected with a recovery threaded rod 35, the outer wall of the recovery threaded rod 35 is threadedly connected with a recovery threaded tube 36, one end of the recovery threaded tube 36 is fixedly connected with a recovery moving rod 37, the two ends of the recovery moving rod 37 are fixedly connected with recovery rollers 38, the outer wall of the recovery rollers 38 is slidably connected with recovery pull ropes 39, the two ends of the recovery pull ropes 39 are respectively fixedly connected with the other ends of the two steel wire ropes 10, and the inside of the recovery seat 32 is provided with a recovery groove matched with the recovery moving rod 37.

[0048] After the bending is completed, the recovery motor 34 rotates to drive the recovery threaded rod 35 to rotate, the rotating recovery threaded rod 35 drives the recovery threaded tube 36 to move linearly through the threaded action and the limiting action of the recovery moving rod 37, the recovery threaded tube 36 drives the recovery moving rod 37 to move linearly, the linearly moving recovery moving rod 37 drives the recovery rollers 38 to move linearly, the linearly moving recovery rollers 38 drive the steel wire rope 10 to move linearly through the recovery pull ropes 39, so as to relax the tension of the steel wire rope 10 on the synchronous connecting rope 27, at this time, the synchronous sliding plate 28 can be reset under the elastic action of the recovery spring 30 to drive the synchronous limiting plate 29 to release the limitation on the sliding support plate 15, so that the flexible support plate 11 does not need to be attached to the inner wall of the profiled pipe 5, and finally the damage of the flexible support plate 11 to the profiled pipe 5 is avoided, and the bending quality of the profiled pipe 5 is improved.

[0049] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the bending pipe technology field can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A three-station special pipe bending machine, characterized in that, The utility model relates to a bent pipe base (1) and fixedly connected conveying motor (2) at the top of bent pipe base (1), the output end of conveying motor (2) is fixedly connected with conveying roller (40), the top of bent pipe base (1) is fixedly connected with fixed plate (3) near conveying motor (2), the one side of fixed plate (3) is connected with fixed roller (41) through bolt, the top of bent pipe base (1) is fixedly connected with bending base (4) near fixed plate (3), the top of bending base (4) is slidably connected with bending roller (42), the one side of bending roller (42) is slidably connected with profiled pipe (5), the one side of fixed plate (3) is fixedly connected with connecting plate (8), the one side of connecting plate (8) is provided with mounting mechanism and support mechanism, the inside of profiled pipe (5) is provided with synchronous mechanism and recovery mechanism, The mounting mechanism includes hydraulic base (6) fixedly connected on one side of connecting plate (8), and hydraulic cylinder (7) is fixedly connected on the top of hydraulic base (6), the output end of hydraulic cylinder (7) is fixedly connected with connecting disc (9), and four steel wire ropes (10) are fixedly connected on one side of connecting disc (9); The mounting mechanism further includes a plurality of flexible support plates (11) slidably connected to the outer wall of the steel wire rope (10), the inner side of each flexible support plate (11) is fixedly connected with a sliding support plate (15), the two sides of the sliding support plate (15) are fixedly connected with a sliding plate (20), the other side of the sliding plate (20) is fixedly connected with a sliding limiting plate (21), the outer wall of the sliding support plate (15) is slidably connected with a mounting plate (16), the two sides of the mounting plate (16) are fixedly connected with a chain plate (17), every two chain plates (17) are rotatably connected by a chain rod (18), the other end of the chain plate (17) is rotatably connected with a core plate (19) by a chain rod (18), and the core plate (19) is fixedly connected to the inner side of the connecting plate (8); The synchronous mechanism includes a synchronous connecting rope (27) fixedly connected on one side of the steel wire rope (10), and the other end of the synchronous connecting rope (27) is fixedly connected with a synchronous sliding plate (28), the top of the synchronous sliding plate (28) is fixedly connected with a synchronous limiting plate (29), and the synchronous sliding plate (28) is installed with a recovery spring (30) between the mounting plate (16); The recovery mechanism includes a recovery inclined plate (31) slidably connected to the outer wall of the most front end of the steel wire rope (10), and a recovery seat (32) is fixedly connected on one side of the recovery inclined plate (31), a recovery connecting seat (33) is fixedly connected on one side of the recovery seat (32), and the other side of the recovery connecting seat (33) is rotatably connected with the chain plate (17) by a chain rod (18). ​ The recovery mechanism further comprises a recovery motor (34) fixedly connected inside the recovery connecting seat (33), and an output end of the recovery motor (34) is fixedly connected with a recovery threaded rod (35), an outer wall of the recovery threaded rod (35) is threadedly connected with a recovery threaded pipe (36), one end of the recovery threaded pipe (36) is fixedly connected with a recovery moving rod (37), both ends of the recovery moving rod (37) are fixedly connected with recovery rollers (38), and an outer wall of the recovery rollers (38) is slidingly connected with recovery pull ropes (39), both ends of the recovery pull ropes (39) are fixedly connected with the other ends of the two steel wires (10) respectively, and the inside of the recovery seat (32) is provided with a recovery groove matched with the recovery moving rod (37).

2. A three-station special pipe bending machine according to claim 1, characterized in that The supporting mechanism comprises two pad plates (12) symmetrically installed on the inner side of the flexible supporting plate (11), and the other side of the pad plate (12) on one side is symmetrically provided with a sliding pipe (13), and the other side of the pad plate (12) on the other side is symmetrically provided with a sliding rod (14), and the outer wall of the sliding rod (14) is slidingly connected with the inner wall of the sliding pipe (13).

3. The three-station special-shaped pipe bending machine according to claim 1, characterized in that, The supporting mechanism further comprises a supporting frame (22) fixedly connected on the inner side of the sliding supporting plate (15), two limiting rods (23) are symmetrically installed on one side of the supporting frame (22), a rebound rod (24) is fixedly connected on the inner side of the mounting plate (16), one end of the rebound rod (24) penetrates through the supporting frame (22) and extends to the inner side of the sliding supporting plate (15), a rebound spring (25) is arranged on the outer wall of the rebound rod (24), and the rebound spring (25) is installed between the supporting frame (22) and the mounting plate (16).

4. The three-station special-shaped pipe bending machine according to claim 1, characterized in that, The synchronous mechanism further comprises two synchronous grooves matched with the synchronous connecting ropes (27) symmetrically arranged on one side of the flexible supporting plate (11), the two synchronous grooves arranged on one side are arranged one above the other, and the inner side of the synchronous groove close to the synchronous connecting rope (27) is rotatably connected with a pulley (26).

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