Heat exchanger bending device with uniform stress

Abstract

The invention relates to the technical field of heat exchanger bending, and discloses a uniform-stress heat exchanger bending device which comprises a base, a fixing table, a first air cylinder and a fixing base are installed at the top of the base, a containing groove is formed in the fixing table, and a rotating shaft, a gear and a spline are rotationally installed in the containing groove. According to the device, the rotating shaft and the spline are arranged, so that the rotating lump can rotate along with the rotating shaft and can move up and down at the same time, and when the device bends a workpiece, the first air cylinder drives the rack, drives the gear, the rotating shaft, the spline and the rotating lump to rotate and drives the upper meshing disc to rotate; the rotating lump is driven to rotate and move up and down in an abdicating mode through the matched meshing arrangement of the upper meshing disc and the lower meshing disc, vibration destressing operation is carried out on a workpiece being bent, the destressing procedure of the workpiece formed after bending is completely omitted through the design, and the working efficiency of the device is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchanger bending, and particularly relates to a heat exchanger bending device with uniform stress. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. The heat exchanger is made of many hollow heat exchange tubes, and the heat exchange tubes are made of metal materials with strong thermal conductivity (such as carbon steel, low alloy steel, stainless steel, and copper). During the processing, the heat exchange tubes generally need to be bent by a bending machine to be bent from a straight tube shape into a U shape. In the prior art, when the heat exchanger bending device applies a pulling force and a bending force to the heat exchange tube, internal deformation stress will be generated at the bending part of the heat exchange tube. Most heat exchange tubes on the market need to be stress-relieved after bending. After retrieval, the bent heat exchange tubes need an additional production line to perform stress-relieving operations uniformly, which undoubtedly increases the production cost of the heat exchanger. Since the internal stress of the heat exchange tube appears during bending, cracks and deformations and other damage situations may occur due to vibration and stacking during the process of transferring the production line. Therefore, the present invention is dedicated to designing a heat exchanger bending device with uniform stress that can relieve stress synchronously. Summary of the Invention

[0003] The present application provides a heat exchanger bending device with uniform stress, which has the advantages of synchronous stress relief and improved work efficiency, and is used to solve the problems of high cost and low work efficiency caused by separately setting up a stress-relieving production line in the prior art.

[0004] To achieve the above object, the present application adopts the following technical solutions: A heat exchanger bending device with uniform stress, comprising: A base, on the top of which a fixed table, a cylinder one, and a fixed seat are respectively installed. A placement groove is opened inside the fixed table, and a rotating shaft, a gear, and a spline are rotatably installed inside the placement groove. A rotating weight is movably installed on the outer surface of the spline, and a moving seat is fixedly installed on the outer surface of the rotating weight; A support ring is fixedly installed inside the fixed seat. The bottom of the rotating weight is fixedly connected to an upper engaging disc, and a clutch ring is movably installed on the top of the fixed table. The top of the clutch ring is fixedly connected to a lower engaging disc. The upper engaging disc and the lower engaging disc are engaged with each other. A reset groove is opened at the top of the inner wall of the fixed table, and a card slot is opened on the outer surface of the clutch ring. A fixed column is fixedly connected to the inner wall of the reset groove, and a contact column is movably sleeved on the outer surface of the fixed column. One end of the contact column abuts against the inner wall of the reset groove, and a spring two is elastically connected between the outer side of the contact column and the inner wall of the reset groove.

[0005] Preferably, a workbench is provided at the rear side of the top of the base. The first cylinder is installed on the front side of the workbench. The telescopic end of the first cylinder is fixedly connected to a rack. The gear is fixedly installed in the middle of the outer surface of the rotating shaft. The spline is fixedly installed at the top of the rotating shaft. The rack meshes with the gear. The fixed seat is located behind the moving seat.

[0006] Preferably, linear motors are installed on the tops of both the fixed seat and the moving seat. A fixed block is slidably installed on the top of the fixed seat through a set of linear motors. A second cylinder is installed at the rear side of the fixed block. A slider and a first clamping block are slidably installed inside the fixed block. The telescopic end of the second cylinder is fixedly connected to the slider. A second clamping block is slidably installed on the top of the moving seat through another set of linear motors.

[0007] Preferably, multiple sets of supporting mechanisms are provided at the left rear side of the top of the base. The supporting mechanisms include multiple sets of supporting columns fixedly installed on the top of the base. Multiple sets of supporting grooves are formed at the bottom of the fixed seat. The supporting columns are adaptively inserted into the inside of the supporting grooves. A first spring is movably sleeved on the outer surface of the supporting column. The two ends of the first spring are elastically connected to the supporting groove and the supporting column respectively.

[0008] Preferably, the top end of the supporting column abuts against the top of the inner wall of the supporting groove, so that the fixed seat can be stably supported at the lowest position.

[0009] Preferably, two sets of steel balls are movably clamped inside the moving seat. Guide grooves are formed at both the upper and lower ends of the supporting ring. The steel balls are adaptively rotatably abutted against the inner wall of the guide groove.

[0010] Preferably, the second spring presses on the abutting column, so that the abutting column generates a torsion force to rotate around the fixed column and approach the inner wall side of the reset groove.

[0011] Preferably, when the rotating weight drives the upper engaging disc to rotate counterclockwise, the clutch ring abuts against the abutting column and cannot rotate. When rotating in the reverse direction, the clutch ring can push the abutting column to the inner wall of the reset groove.

[0012] Preferably, a relief groove is formed on one side of the abutting column facing the reset groove. The number of the reset grooves, the abutting columns and the card slots is greater than four groups, and they are all circumferentially equidistributed.

[0013] Preferably, a limiting ring is fixedly installed on the top of the fixed table. The axial cross-sectional shape of the limiting ring is "U" shaped. The clutch ring is adaptively sleeved on the inner wall of the limiting ring.

[0014] The beneficial effects of the present invention are as follows: 1. This device has been redesigned so that the workpiece can complete vibration stress relief during the bending and forming process, greatly reducing the production and processing costs. By arranging a support ring fixedly installed inside the fixed seat and slidingly supporting the moving seat through the support ring, the moving seat can rotate with the rotating block and perform bending operations on the workpiece. By arranging a rotating shaft and a spline, the rotating block can rotate with the rotating shaft and also move up and down. When the device bends the workpiece, the cylinder 1 drives the rack, driving the gear, rotating shaft, spline and rotating block to rotate, driving the upper engaging disc to rotate, so that the matching engagement setting of the upper engaging disc and the lower engaging disc drives the rotating block to rotate while making up-and-down yielding movements, and performs vibration stress relief operations on the workpiece being bent. This design completely eliminates the stress relief process for the workpiece after bending and forming, greatly improving the working efficiency of the device.

[0015] 2. Then, this device also uses the support ring to limit and support the moving seat, and uses the support mechanism to abut and support the fixed seat, so that the fixed seat, rotating block and moving seat can maintain stable limit support in the lowest position. By opening a support groove at the bottom of the fixed seat, the support column and spring 1 are properly sleeved therein, and a closed loop is formed by the support ring to slidingly support the moving seat, so that the moving seat can slide on the surface of the support ring with the rotation of the rotating block. When the rotating block vibrates due to the mutual abutment and limitation of the upper engaging disc and the lower engaging disc, the support ring drives the fixed seat and the moving seat to move up and down together, and the top of the support column just abuts and supports when the fixed seat moves to the lowest point, and transmits the energy generated by the vibration to the surface of the workpiece, keeping the workpiece under uniform stress while being vibration stress relieved.

[0016] 3. Finally, after the workpiece is bent and formed, the rotating block will drive the moving seat and the upper engaging disc to rotate and return to the original position. At this time, the clutch ring needs to rotate with the rotating block to avoid unnecessary vibration during the return stroke. By setting the abutting column to be rotatable and under the elastic force of spring 2, the abutting column always has a tendency to move towards the inner wall of the card slot. When the rotating block rotates and drives the upper engaging disc, lower engaging disc and clutch ring, the inner wall of the card slot just pushes the abutting column outwards, giving the clutch ring a one-way self-locking function and greatly improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings forming a part of the specification depict the embodiments disclosed in the present application and, together with the specification, are used to explain the principles of the present application in a clear and understandable manner.

[0018] Referring to the drawings, the present disclosure can be more clearly understood from the following detailed description, wherein: Figure 1 It is a schematic diagram of the internal structure of the fixed table; Figure 2Separation schematic diagram of the rotating shaft, gear, spline, upper engaging disc, clutch ring, lower engaging disc, fixed column and abutting column; Figure 3 Top view sectional schematic diagram of the fixed table and the clutch ring; Figure 4 Front appearance schematic diagram of the overall structure; Figure 5 Front sectional schematic diagram of the overall structure; Figure 6 For Figure 5 Enlarged schematic diagram of the structure at position A in Figure 7 Side appearance schematic diagram of the overall structure; Figure 8 Schematic diagram of the appearance of the other side of the overall structure; Figure 9 Top view sectional schematic diagram of the overall structure; Figure 10 Back appearance schematic diagram of the overall structure.

[0019] Wherein: 1. Base; 2. Fixed table; 3. Cylinder 1; 4. Rack; 5. Support mechanism; 51. Support column; 52. Spring 1; 53. Support groove; 6. Fixed seat; 7. Rotating mass; 8. Moving seat; 9. Support ring; 10. Guide groove; 11. Linear motor; 12. Fixed block; 13. Cylinder 2; 14. Slide block; 15. Clamping block 1; 16. Clamping block 2; 17. Placing groove; 18. Rotating shaft; 19. Gear; 20. Spline; 21. Upper engaging disc; 22. Clutch ring; 23. Lower engaging disc; 24. Card slot; 25. Reset groove; 26. Fixed column; 27. Abutting column; 28. Spring 2; 29. Steel ball; 30. Limit ring. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts belong to the scope of protection of the present application.

[0021] Please refer to Figures 1 - 10 , this embodiment discloses a heat exchanger bending device with uniform stress, including: Base 1, on the top of the base 1, a fixed table 2, a cylinder 1 3 and a fixed seat 6 are respectively installed. Inside the fixed table 2, a placing groove 17 is opened. Inside the placing groove 17, a rotating shaft 18, a gear 19 and a spline 20 are rotatably installed. On the outer surface of the spline 20, a rotating mass 7 is movably installed. On the outer surface of the rotating mass 7, a moving seat 8 is fixedly installed; A support ring 9 is fixedly installed inside the fixed seat 6. The bottom of the rotating weight 7 is fixedly connected to an upper engaging disc 21. The top of the fixed platform 2 is movably installed with a clutch ring 22. The top of the clutch ring 22 is fixedly connected to a lower engaging disc 23. The upper engaging disc 21 and the lower engaging disc 23 engage with each other. A reset groove 25 is formed at the top of the inner wall of the fixed platform 2. A card slot 24 is formed on the outer surface of the clutch ring 22. A fixed column 26 is fixedly connected to the inner wall of the reset groove 25. An abutting column 27 is movably sleeved on the outer surface of the fixed column 26. One end of the abutting column 27 abuts against the inner wall of the reset groove 25. A second spring 28 is elastically connected between the outer side of the abutting column 27 and the inner wall of the reset groove 25; This device has been redesigned so that the workpiece can complete vibration stress relief during the process of being bent and formed, greatly reducing the production and processing costs. By arranging the support ring 9 fixedly installed inside the fixed seat 6 and slidingly supporting the moving seat 8 through the support ring 9, the moving seat 8 can rotate with the rotating weight 7 and perform bending operations on the workpiece. By arranging the rotating shaft 18 and the spline 20, the rotating weight 7 can rotate with the rotating shaft 18 and also move up and down. When the device bends the workpiece, the cylinder 1 drives the rack 4, and drives the gear 19, the rotating shaft 18, the spline 20 and the rotating weight 7 to rotate, driving the upper engaging disc 21 to rotate, so that the matching engagement setting of the upper engaging disc 21 and the lower engaging disc 23 drives the rotating weight 7 to rotate while moving up and down to make way, and performs vibration stress relief operations on the workpiece being bent. This design completely eliminates the stress relief process for the workpiece after bending and forming, greatly improving the working efficiency of the device.

[0022] Among them, a workbench is arranged at the rear side of the top of the base 1. The cylinder 1 is installed on the front side of the workbench. The telescopic end of the cylinder 1 is fixedly connected to a rack 4. The gear 19 is fixedly installed in the middle of the outer surface of the rotating shaft 18. The spline 20 is fixedly installed at the top of the rotating shaft 18. The rack 4 meshes with the gear 19. The fixed seat 6 is located behind the moving seat 8; As Figure 7 shown, when the cylinder 1 drives the rack 4 to move forward, the rotating shaft 18, the spline 20, the rotating weight 7 and the moving seat 8 are driven by the gear 19 to rotate counterclockwise around the axis of the rotating weight 7, so as to synchronously bend the workpiece. At this time, the cylinder 2 will drive the slider 14 and the clamping block 1 to extend forward, so that the workpiece is driven forward and the situation of uneven force is avoided.

[0023] Among them, linear motors 11 are installed on the tops of both the fixed seat 6 and the moving seat 8. The top of the fixed seat 6 is slidably installed with a fixed block 12 through a group of linear motors 11. A cylinder 2 is installed at the rear of the fixed block 12. A slider 14 and a clamping block 1 are slidably installed inside the fixed block 12. The telescopic end of the cylinder 2 is fixedly connected to the slider 14. The top of the moving seat 8 is slidably installed with a clamping block 2 through another group of linear motors 11; Cylinder two 13 drives the slider 14 and the first clamping block 15 to move forward, and the linear motor 11 drives the second clamping block 16 to press against the outer surface of the workpiece to the right, causing the workpiece to generate a frictional force in contact with the second clamping block 16.

[0024] Among them, multiple groups of support mechanisms 5 are arranged at the left rear side of the top of the base 1. The support mechanism 5 includes multiple groups of support columns 51 fixedly installed on the top of the base 1. Multiple groups of support grooves 53 are opened at the bottom of the fixed seat 6. The support columns 51 are adaptively inserted into the interior of the support grooves 53. A first spring 52 is movably sleeved on the outer surface of the support column 51. The two ends of the first spring 52 are elastically connected to the support groove 53 and the support column 51 respectively; This device also uses the support ring 9 to limit and support the moving seat 8, and uses the support mechanism 5 to abut and support the fixed seat 6, so that the fixed seat 6, the rotating weight 7 and the moving seat 8 can maintain stable limit support at the lowest position. By opening the support groove 53 at the bottom of the fixed seat 6, the support column 51 and the first spring 52 are adaptively sleeved therein, and a closed loop is formed by the support ring 9 to slidably support the moving seat 8, so that the moving seat 8 can slide on the surface of the support ring 9 as the rotating weight 7 rotates. When the rotating weight 7 vibrates due to the upper clamping disc 21 and the lower clamping disc 23 abutting and limiting each other, the support ring 9 drives the fixed seat 6 and the moving seat 8 to move up and down together, and the top end of the support column 51 just abuts and supports when the fixed seat 6 moves to the lowest point, and transmits the energy generated by the vibration to the surface of the workpiece, keeping the workpiece under stress relief while keeping the workpiece evenly stressed.

[0025] Among them, the top end of the support column 51 abuts against the top of the inner wall of the support groove 53, so that the fixed seat 6 can be stably supported at the lowest position; The top end of the support column 51 supports the fixed seat 6, so that the fixed seat 6 can be stable at the lowest position, avoiding burden on the moving seat 8, and thus maintaining the stability of the entire device.

[0026] Among them, two sets of upper and lower steel balls 29 are movably clamped inside the moving seat 8. Guide grooves 10 are opened at both the upper and lower ends of the support ring 9. The steel balls 29 are adaptively rotatably abutted against the inner wall of the guide groove 10; As Figure 5 、 Figure 6 shown, one side of the moving seat 8 is fixedly connected to the rotating weight 7, and the other side is slidably connected to the support ring 9 through the built-in steel balls 29, so that the moving seat 8 is more stable during the movement process.

[0027] Among them, the second spring 28 presses on the abutting column 27, causing the abutting column 27 to generate a torsion force to rotate around the fixed column 26 and approach the inner wall side of the reset groove 25; As Figure 3As shown in the figure, when the workpiece is bent, the clutch ring 22 is subjected to the torsional force in the counterclockwise direction from the rotating weight 7 and the upper engaging disc 21. At this time, the second spring 28 pushes the abutting column 27 into the inner wall of the card slot 24, and makes the abutting column 27 directly abut against the inner wall of the card slot 24, so that the clutch ring 22 cannot rotate, thereby causing relative movement between the upper engaging disc 21 and the lower engaging disc 23. After the workpiece is bent and formed, the rotating weight 7 drives the moving seat 8 and the upper engaging disc 21 to rotate and reset. At this time, the clutch ring 22 needs to rotate with the rotating weight 7 to avoid unnecessary vibration during the return stroke. By setting the abutting column 27 to be rotatable, and under the elastic force of the second spring 28, the abutting column 27 always has a tendency to move towards the inner wall of the card slot 24. When the rotating weight 7 rotates and drives the upper engaging disc 21, the lower engaging disc 23 and the clutch ring 22, the inner wall of the card slot 24 just pushes the abutting column 27 outward, so that the clutch ring 22 has a one-way self-locking function, greatly improving the practicability of the device.

[0028] Among them, when the rotating weight 7 drives the upper engaging disc 21 to rotate counterclockwise, the clutch ring 22 abuts against the abutting column 27 and cannot rotate. When rotating in the reverse direction, the clutch ring 22 can push the abutting column 27 to the inner wall of the reset groove 25; The clutch ring 22 and the lower engaging disc 23 are fixed as a whole. The rotation of the clutch ring 22 in the counterclockwise direction is controlled by the second spring 28 and the abutting column 27, and the rotation in the clockwise direction is controllable, thereby endowing the lower engaging disc 23 with a one-way self-locking function.

[0029] Among them, a relief groove is provided on one side of the abutting column 27 facing the reset groove 25. The number of the reset grooves 25, the abutting columns 27 and the card slots 24 is more than four groups, and they are all equidistantly distributed in a circle; The relief groove of the abutting column 27 saves the internal space of the fixed table 2 and prevents the clutch ring 22 from getting stuck with the abutting column 27 when the clutch ring 22 rotates relative to the inner wall of the fixed table 2.

[0030] Among them, a limiting ring 30 is fixedly installed on the top of the fixed table 2. The axial cross-section shape of the limiting ring 30 is "U" shaped, and the clutch ring 22 is fitted and sleeved on the inner wall of the limiting ring 30; The limiting ring 30 is nested on the top of the fixed table 2, responsible for restricting the clutch ring 22 and preventing the clutch ring 22 from running out of the top of the fixed table 2.

[0031] Working principle: When the device is working, first, the workpiece is placed in the reserved groove on the outer surface of the rotating weight 7. The linear motor 11 is started and drives the clamping block one 15 and the clamping block two 16 to move synchronously to the right, clamping the outer surface of the workpiece to complete the preparation work for workpiece clamping; Then, simultaneously start cylinder 1 and cylinder 2, and ensure the same extension stroke. At this time, cylinder 2 drives the fixed block 12, slider 14 and clamping block 1 forward to push the workpiece. At the same time, cylinder 1 drives the rack 4 to move, and drives the rotating shaft 18, spline 20, rotating block 7, moving seat 8 and clamping block 2 to rotate synchronously through the gear 19, so that the workpiece is pressed and deformed by the rotating rotating block 7 and clamping block 2, and gradually changes to a "U" shape. The moving seat 8 slides on the outer surface of the support ring 9; Then, while the rotating block 7 is rotating, as Figure 3 shown, the rotating block 7 will drive the upper engaging disc 21 to rotate counterclockwise around the axis of the rotating shaft 18. At this time, the lower engaging disc 23 and the clutch ring 22 are subjected to the torque of the counterclockwise rotation of the upper engaging disc 21, keep in contact with the abutting column 27, and remain stationary. Since the clutch ring 22 and the lower engaging disc 23 do not move, the upper engaging disc 21 moves upward under the engagement limit of the lower engaging disc 23, and drives the rotating block 7, moving seat 8, fixed seat 6 and the entire workpiece to move upward. Then, when the upper engaging disc 21 moves to a position where it re-engages and mates with the lower engaging disc 23, it automatically moves downward. Since the number of teeth of the upper engaging disc 21 is large, the workpiece is subjected to back-and-forth vibrations in the up and down directions during the bending deformation process, thereby eliminating the internal stress; Finally, when the rotating block 7 drives the moving seat 8 to rotate and reset, the rotating block 7 drives the upper engaging disc 21, lower engaging disc 23 and clutch ring 22 to rotate clockwise. At this time, the clutch ring 22 pushes the entire abutting column 27 into the internal reset groove 25 through the card slot 24 opened on its outer surface, so that the clutch ring 22 can rotate and reset with the lower engaging disc 23 and upper engaging disc 21, avoiding vibration of the rotating block 7 during rotation.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A heat exchanger bending device with uniform force, characterized in that: include: A base (1), wherein a fixed platform (2), a cylinder (3) and a fixed seat (6) are respectively installed on the top of the base (1), a placement groove (17) is provided inside the fixed platform (2), a rotating shaft (18), a gear (19) and a spline (20) are rotatably installed inside the placement groove (17), a rotating block (7) is movably installed on the outer surface of the spline (20), and a movable seat (8) is fixedly installed on the outer surface of the rotating block (7); A support ring (9) is fixedly installed inside the fixed seat (6), an upper bite plate (21) is fixedly connected to the bottom of the rotating ball (7), a clutch ring (22) is movably installed on the top of the fixed platform (2), a lower bite plate (23) is fixedly connected to the top of the clutch ring (22), the upper bite plate (21) and the lower bite plate (23) are engaged with each other, a reset groove (25) is provided at the top of the inner wall of the fixed platform (2), a clamping groove (24) is provided on the outer surface of the clutch ring (22), a fixing column (26) is fixedly connected to the inner wall of the reset groove (25), an abutting column (27) is movably sleeved on the outer surface of the fixing column (26), one end of the abutting column (27) abuts against the inner wall of the reset groove (25), and a spring (28) is elastically connected between the outer side surface of the abutting column (27) and the inner wall of the reset groove (25).

2. A heat exchanger bending device with uniform force according to claim 1, characterized in that: A workbench is provided at the rear side of the top of the base (1), the cylinder one (3) is installed at the front side of the workbench, the telescopic end of the cylinder one (3) is fixedly connected to a rack (4), the gear (19) is fixedly installed at the middle part of the outer surface of the rotating shaft (18), the spline (20) is fixedly installed at the top end of the rotating shaft (18), the rack (4) is meshed with the gear (19), and the fixed seat (6) is located behind the movable seat (8).

3. A heat exchanger bending device with uniform force according to claim 2, characterized in that: The tops of the fixed seat (6) and the movable seat (8) are both installed with linear motors (11); the top of the fixed seat (6) is slidably installed with a fixed block (12) via a set of linear motors (11); a second cylinder (13) is installed on the rear side of the fixed block (12); a slider (14) and a clamping block (15) are slidably installed inside the fixed block (12); the telescopic end of the second cylinder (13) is fixedly connected to the slider (14); and the top of the movable seat (8) is slidably installed with a second clamping block (16) via another set of linear motors (11).

4. A heat exchanger bending device with uniform force according to claim 3, characterized in that: A plurality of support mechanisms (5) are arranged on the left rear side of the top of the base (1), the support mechanisms (5) comprising a plurality of support columns (51) fixedly mounted on the top of the base (1), a plurality of support grooves (53) are arranged at the bottom of the fixing seat (6), the support columns (51) are adapted to be inserted into the inside of the support grooves (53), a spring (52) is movably sleeved on the outer surface of the support column (51), and the two ends of the spring (52) are elastically connected to the support grooves (53) and the support column (51) respectively.

5. A heat exchanger bending device with uniform force according to claim 4, characterized in that: The top end of the support column (51) abuts against the top of the inner wall of the support groove (53), so that the fixing seat (6) can be stably supported at the lowest position.

6. A heat exchanger bending device with uniform force according to claim 5, characterized in that: The inner wall of the movable seat (8) is movably clamped with two groups of upper and lower steel balls (29), and the upper and lower ends of the support ring (9) are both provided with guide grooves (10), and the steel balls (29) are adapted to rotate and abut against the inner wall of the guide groove (10).

7. A heat exchanger bending device with uniform force according to claim 6, characterized in that: The second spring (28) applies pressure to the abutment column (27), causing the abutment column (27) to generate a torsion force that rotates around the fixed column (26) and approaches one side of the inner wall of the reset groove (25).

8. A heat exchanger bending device with uniform force according to claim 7, characterized in that: When the rotating ball (7) drives the upper engaging disk (21) to rotate counterclockwise, the clutch ring (22) abuts against the abutting column (27) and cannot rotate; when rotating in the reverse direction, the clutch ring (22) can push the abutting column (27) to the inner wall of the reset groove (25).

9. A heat exchanger bending device with uniform force according to claim 8, characterized in that: A clearance groove is provided on one side of the abutment column (27) facing the reset groove (25); the number of the reset groove (25), the abutment column (27) and the clamping groove (24) is greater than four groups and are all equidistantly distributed around the circumference.

10. A heat exchanger bending device with uniform force according to claim 9, characterized in that: A limit ring (30) is fixedly mounted on the top of the fixed platform (2); the axial cross-section of the limit ring (30) is in a "U" shape; and the clutch ring (22) is adapted to be fitted on the inner wall of the limit ring (30).

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