A heat exchanger bending device with uniform force

Abstract

The present application relates to the technical field of heat exchanger bending, and discloses a heat exchanger bending device with uniform force, comprising: a base, a fixed platform, a cylinder 1 and a fixed seat are respectively installed on the top of the base, a placement slot is opened inside the fixed platform, and a rotating shaft, a gear and a spline are rotatably installed inside the placement slot. The device is provided with a rotating shaft and a spline, so that the turning ball can rotate with the rotating shaft and move up and down. When the device bends the workpiece, the rack is driven by the cylinder 1, and the gear, the rotating shaft, the spline and the turning ball are driven to rotate, and the upper engaging disk is driven to rotate, so that the adaptive engaging setting of the upper engaging disk and the lower engaging disk drives the turning ball to rotate while making up and down movement, and performs a vibration stress relief operation 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.

Description

Technical Field

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

[0002] A heat exchanger, also known as a heat exchanger, is a device that transfers some of the heat from a hot fluid to a cold fluid. It's made of numerous hollow heat exchange tubes, made from highly thermally conductive metals (such as carbon steel, low-alloy steel, stainless steel, and copper). During processing, the tubes are typically bent using a bending machine, from a straight tube into a U-shape. In existing heat exchanger bending machines, the pulling and bending forces applied to the tubes create internal deformation stresses in the bent portion of the tubes. Most commercially available tubes require stress relief after bending. A search revealed that additional production lines are required to uniformly relieve the stresses on bent tubes, significantly increasing production costs. Because internal stresses are present during bending, the tubes can be damaged by vibration, stacking, and cracks during transfer to the production line. Therefore, the present invention is directed to designing a heat exchanger bending device that simultaneously relieves stress and provides uniform force. Summary of the Invention

[0003] The present application proposes a heat exchanger bending device with uniform force, 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 the separate setting of stress relief production lines in the existing technology.

[0004] To achieve the above objectives, the present application adopts the following technical solution: a heat exchanger bending device with uniform force, comprising:

[0005] The base is provided with a fixed platform, a cylinder and a fixed seat on the top thereof. A placement slot is provided inside the fixed platform. A rotating shaft, a gear and a spline are rotatably installed inside the placement slot. A rotating block is movably installed on the outer surface of the spline. A movable seat is fixedly installed on the outer surface of the rotating block.

[0006] A support ring is fixedly installed inside the fixed seat, the bottom of the rotating ball is fixedly connected to an upper bite disk, the top of the fixed platform is movably installed with a clutch ring, the top of the clutch ring is fixedly connected to a lower bite disk, the upper bite disk and the lower bite disk are engaged with each other, a reset groove is provided at the top of the inner wall of the fixed platform, a card groove is provided on the outer surface of the clutch ring, a fixed column is fixedly connected to the inner wall of the reset groove, an abutment column is movably sleeved on the outer surface of the fixed column, one end of the abutment column abuts against the inner wall of the reset groove, and a spring 2 is elastically connected between the outer side surface of the abutment column and the inner wall of the reset groove.

[0007] Preferably, a workbench is provided on the rear side of the top of the base, 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, the gear is fixedly installed on the middle part of the outer surface of the rotating shaft, the spline is fixedly installed on the top of the rotating shaft, the rack is meshed with the gear, and the fixed seat is located behind the movable seat.

[0008] Preferably, linear motors are installed on the top of the fixed seat and the movable seat, and a fixed block is slidably installed on the top of the fixed seat through a group of linear motors, and a second cylinder is installed on the rear side of the fixed block. A slider and a clamping block one are slidably installed inside the fixed block, and the telescopic end of the second cylinder is fixedly connected to the slider, and a clamping block two is slidably installed on the top of the movable seat through another group of linear motors.

[0009] Preferably, multiple groups of support mechanisms are provided on the left rear side of the top of the base, and the support mechanisms include multiple groups of support columns fixedly installed on the top of the base, and multiple groups of support grooves are provided at the bottom of the fixed seat. The support columns are adapted to be inserted into the interior of the support grooves, and a spring 1 is movably sleeved on the outer surface of the support column, and the two ends of the spring 1 are elastically connected to the support groove and the support column respectively.

[0010] Preferably, the top end of the support column abuts against the top end of the inner wall of the support groove, so that the fixing seat can be stably supported at the lowest position.

[0011] Preferably, the inner wall of the movable seat is movably clamped with two groups of upper and lower steel balls, and the upper and lower ends of the support ring are provided with guide grooves, and the steel balls are adapted to rotate and abut against the inner wall of the guide groove.

[0012] Preferably, the second spring applies pressure to the abutting column, causing the abutting column to generate a torsional force that rotates around the fixing column and approaches a side of the inner wall of the reset groove.

[0013] Preferably, when the rotary knob drives the upper engaging disk to rotate counterclockwise, the clutch ring abuts against the abutment column and cannot rotate; when rotating in the reverse direction, the clutch ring can push the abutment column to the inner wall of the reset groove.

[0014] Preferably, a clearance groove is provided on one side of the abutment column facing the reset groove, and the number of the reset groove, the abutment column and the clamping groove is greater than four groups, and they are all equidistantly distributed around the circumference.

[0015] Preferably, a limiting ring is fixedly installed on the top of the fixing platform, the axial cross-section of the limiting ring is "U"-shaped, and the clutch ring is adapted to be fitted on the inner wall of the limiting ring.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. This device has been redesigned so that the workpiece can complete vibration stress relief during the bending process, which greatly reduces the production and processing costs. It is fixedly installed inside the fixed seat by a support ring, and the movable seat is slidably supported by the support ring, so that the movable seat can rotate with the turntable and perform bending operations on the workpiece. The turntable is provided with a rotating shaft and a spline, so that the turntable can rotate with the rotating shaft while also moving up and down. When the device bends the workpiece, the rack is driven by the cylinder, and the gear, rotating shaft, spline and turntable are driven to rotate, driving the upper engaging disk to rotate, so that the adaptive engaging setting of the upper and lower engaging disks drives the turntable to rotate while making up and down 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, and greatly improves the working efficiency of the device.

[0018] 2. Then, the device also uses a support ring to provide limited support for the movable seat, and uses a support mechanism to abut and support the fixed seat, so that the fixed seat, swivel and movable seat can maintain stable limited support at the lowest position. A support groove is opened at the bottom of the fixed seat, so that the support column and the spring are adapted to be fitted therein, and a closed loop is formed by the support ring to provide sliding support for the movable seat, so that the movable seat can slide on the surface of the support ring as the swivel rotates. When the swivel is limited by the abutment of the upper and lower bite plates to each other and vibrates, the support ring drives the fixed seat and the movable seat to move up and down together, and the top end 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 evenly stressed while being vibrated to relieve stress.

[0019] 3. Finally, after the workpiece is bent and formed, the turning ball will drive the moving seat and the upper engaging disk to rotate and reset. At this time, the clutch ring needs to rotate with the turning ball to avoid unnecessary vibration in the return stage. By setting the abutment column to be rotatable and under the elastic force of spring 2, the abutment column always has a tendency to move toward the inner wall of the slot. When the turning ball rotates and drives the upper engaging disk, the lower engaging disk and the clutch ring, the inner wall of the slot just pushes the abutment column outward, so that the clutch ring has a one-way self-locking function, which greatly improves the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0021] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 Schematic diagram of the internal structure of the fixed platform;

[0023] Figure 2 Schematic diagram of the separation of the rotating shaft, gear, spline, upper bite plate, clutch ring, lower bite plate, fixed column and abutment column;

[0024] Figure 3 It is a top view cutaway diagram of the fixed platform and the clutch ring;

[0025] Figure 4 This is a schematic diagram of the front appearance of the overall structure;

[0026] Figure 5 It is a front cutaway diagram of the overall structure;

[0027] Figure 6 for Figure 5 A magnified schematic diagram of the structure at center A;

[0028] Figure 7 This is a schematic diagram of the appearance of one side of the overall structure;

[0029] Figure 8 This is a schematic diagram of the appearance of the other side of the overall structure;

[0030] Figure 9 It is a top view cutaway diagram of the overall structure;

[0031] Figure 10 This is a schematic diagram of the back appearance of the overall structure.

[0032] Among them: 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 ball; 8. Moving seat; 9. Support ring; 10. Guide groove; 11. Linear motor; 12. Fixed block; 13. Cylinder 2; 14. Slider; 15. Clamping block 1; 16. Clamping block 2; 17. Placement groove; 18. Rotating shaft; 19. Gear; 20. Spline; 21. Upper bite plate; 22. Clutch ring; 23. Lower bite plate; 24. Slot; 25. Reset groove; 26. Fixed column; 27. Abutment column; 28. Spring 2; 29. ​​Steel ball; 30. Limit ring. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] See also Figures 1-10 This embodiment discloses a heat exchanger bending device with uniform force, comprising:

[0035] Base 1, the top of the base 1 is respectively installed with a fixed platform 2, a cylinder 3 and a fixed seat 6, the interior of the fixed platform 2 is provided with a placement groove 17, the interior of the placement groove 17 is rotatably installed with a rotating shaft 18, a gear 19 and a spline 20, the outer surface of the spline 20 is movably installed with a rotating block 7, and the outer surface of the rotating block 7 is fixedly installed with a movable seat 8;

[0036] A support ring 9 is fixedly installed inside the fixed seat 6, an upper bite disk 21 is fixedly connected to the bottom of the swivel 7, a clutch ring 22 is movably installed on the top of the fixed platform 2, and a lower bite disk 23 is fixedly connected to the top of the clutch ring 22. The upper bite disk 21 and the lower bite disk 23 bite each other, a reset groove 25 is provided on the top of the inner wall of the fixed platform 2, and a card groove 24 is provided 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, and an abutment column 27 is movably sleeved on the outer surface of the fixed column 26. One end of the abutment 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 abutment column 27 and the inner wall of the reset groove 25;

[0037] The present invention relates to a device for producing a workpiece which is subjected to vibration stress relief during the bending process, and the production cost is greatly reduced. The device is fixedly installed in the fixed seat 6 by the support ring 9, and the movable seat 8 is slidably supported by the support ring 9, so that the movable seat 8 can rotate with the rotary ball 7 and perform bending operations on the workpiece. The rotary shaft 18 and the spline 20 are provided, so that the rotary ball 7 can rotate with the rotary shaft 18 while also moving up and down. When the device bends the workpiece, the rack 4 is driven by the cylinder 13, and the gear 19, the rotary shaft 18, the spline 20 and the rotary ball 7 are driven to rotate, and the upper engaging disk 21 is driven to rotate, so that the adaptive engaging setting of the upper engaging disk 21 and the lower engaging disk 23 drives the rotary ball 7 to rotate while performing up and down giving way motion, 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, and greatly improves the working efficiency of the device.

[0038] Among them, a workbench is provided on the rear side of the top of the base 1, a cylinder 3 is installed on the front side of the workbench, a rack 4 is fixedly connected to the telescopic end of the cylinder 3, a gear 19 is fixedly installed on the middle part of the outer surface of the rotating shaft 18, a spline 20 is fixedly installed on the top 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;

[0039] like Figure 7As shown, when cylinder 1 3 drives rack 4 to move forward, gear 19 drives shaft 18, spline 20, swivel 7 and moving seat 8 to rotate counterclockwise around the axis of swivel 7, thereby bending the workpiece synchronously. At this time, cylinder 2 13 will drive slider 14 and clamping block 1 15 to extend forward, so that the workpiece is driven forward and uneven force is avoided.

[0040] Among them, a linear motor 11 is installed on the top of the fixed seat 6 and the movable seat 8. A fixed block 12 is slidably installed on the top of the fixed seat 6 through a group 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. The top of the movable seat 8 is slidably installed with a second clamping block 16 through another group of linear motors 11.

[0041] The second cylinder 13 drives the slider 14 and the clamping block 15 to move forward, and the linear motor 11 drives the second clamping block 16 to press the outer surface of the workpiece to the right, so that the workpiece and the clamping block 16 generate abutting friction.

[0042] Among them, multiple groups of support mechanisms 5 are provided on the left rear side of the top of the base 1. The support mechanisms 5 include multiple groups of support columns 51 fixedly installed on the top of the base 1. The bottom of the fixing seat 6 is provided with multiple groups of support grooves 53. The support columns 51 are adapted to be inserted into the interior of the support grooves 53. The outer surface of the support column 51 is movably sleeved with a spring 52. The two ends of the spring 52 are elastically connected to the support grooves 53 and the support column 51 respectively.

[0043] This device also uses a support ring 9 to provide limited support for the movable seat 8, and uses the support mechanism 5 to provide abutment support for the fixed seat 6, so that the fixed seat 6, the rotating ball 7 and the movable seat 8 can maintain stable limited support at the lowest position. By providing a support groove 53 at the bottom of the fixed seat 6, the support column 51 and the spring 52 are adapted to be fitted therein, and a closed loop is formed by the support ring 9 to provide sliding support for the movable seat 8, so that the movable seat 8 can slide on the surface of the support ring 9 as the rotating ball 7 rotates. When the rotating ball 7 is abutted and limited by the upper bite plate 21 and the lower bite plate 23 to generate vibration, the fixed seat 6 and the movable seat 8 are driven up and down together by the support ring 9, 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 evenly stressed while being vibrated to relieve stress.

[0044] The top 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;

[0045] The top end of the support column 51 supports the fixed base 6 so that the fixed base 6 can be stable at the lowest position, thereby avoiding burdening the movable base 8 and maintaining the stability of the entire device.

[0046] Among them, the inner wall of the movable seat 8 is movably connected with two sets of upper and lower steel balls 29, and the upper and lower ends of the support ring 9 are 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;

[0047] like Figure 5 、 Figure 6 As shown, the movable seat 8 is fixedly connected to the rotary block 7 on one side and is slidingly connected to the support ring 9 through the built-in steel balls 29 on the other side, so that the movable seat 8 is more stable during the movement.

[0048] The second spring 28 applies pressure to the abutment column 27, causing the abutment column 27 to generate a torsional force that rotates around the fixed column 26 and approaches the inner wall of the reset groove 25.

[0049] like Figure 3 As shown, when the workpiece is bent, the clutch ring 22 is subjected to a counterclockwise torsion force from the rotary block 7 and the upper engaging disk 21. At this time, the spring 28 pushes the abutment column 27 into the inner wall of the slot 24 and makes the abutment column 27 directly abut against the inner wall of the slot 24, so that the clutch ring 22 cannot rotate, thereby causing the upper engaging disk 21 and the lower engaging disk 23 to move relative to each other. After the workpiece is bent and formed, the rotary block 7 will drive the moving seat 8 and the upper engaging disk 21 to rotate and reset. At this time, the clutch ring 22 needs to rotate with the rotary ball 7 to avoid unnecessary vibration during the return stage. By setting the abutment column 27 to be rotatable, and under the elastic force of the spring 28, the abutment column 27 always has a tendency to move toward the inner wall of the slot 24. When the rotary ball 7 rotates and drives the upper bite plate 21, the lower bite plate 23 and the clutch ring 22, the inner wall of the slot 24 just pushes the abutment column 27 outward, so that the clutch ring 22 has a one-way self-locking function, which greatly improves the practicality of the device.

[0050] When the rotary block 7 drives the upper engaging disk 21 to rotate counterclockwise, the clutch ring 22 abuts against the abutment column 27 and cannot rotate. When rotating in the reverse direction, the clutch ring 22 can push the abutment column 27 to the inner wall of the reset groove 25.

[0051] The clutch ring 22 and the lower bite plate 23 are fixed as a whole, and the clutch ring 22 is controlled by the spring 28 and the abutment column 27 to be non-rotatable counterclockwise and rotatable clockwise, thereby giving the lower bite plate 23 a one-way self-locking function.

[0052] Among them, a clearance groove is opened on the 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 they are all distributed equidistantly around the circumference.

[0053] The clearance grooves of the abutment posts 27 save internal space of the fixing platform 2 and prevent the clutch ring 22 and the abutment posts 27 from getting stuck when the clutch ring 22 rotates relative to the inner wall of the fixing platform 2 .

[0054] Among them, a limit ring 30 is fixedly installed on the top of the fixed platform 2, the axial cross-section of the limit ring 30 is "U"-shaped, and the clutch ring 22 is adapted to be fitted on the inner wall of the limit ring 30;

[0055] The limiting ring 30 is nested on the top of the fixing platform 2 and is responsible for limiting the clutch ring 22 and preventing the clutch ring 22 from running out of the top of the fixing platform 2 .

[0056] Working principle:

[0057] When the device is working, first, the workpiece is placed in the reserved groove on the outer surface of the rotary block 7, the linear motor 11 is started, and the clamping block 15 and the clamping block 2 16 are driven to move synchronously to the right, clamping the outer surface of the workpiece, completing the preparation work for the workpiece clamping;

[0058] Then, cylinder 1 3 and cylinder 2 13 are started simultaneously, and the same extension stroke is ensured. At this time, cylinder 2 13 drives fixed block 12, slide block 14 and clamping block 15 to push the workpiece forward. At the same time, cylinder 1 3 drives rack 4 to move, and drives rotating shaft 18, spline 20, rotary block 7, movable seat 8 and clamping block 2 16 to rotate synchronously through gear 19, so that the workpiece is pressed and deformed by the rotating rotary block 7 and clamping block 2 16, gradually turning into a "U" shape, and movable seat 8 slides on the outer surface of support ring 9;

[0059] Then, while the rotary ball 7 is rotating, Figure 3 As shown, the rotary block 7 will drive the upper engaging plate 21 to rotate counterclockwise around the axis of the rotating shaft 18. At this time, the lower engaging plate 23 and the clutch ring 22 are subjected to the torsion force from the counterclockwise rotation of the upper engaging plate 21, and remain in contact with the abutment column 27 and are fixed. Since the clutch ring 22 and the lower engaging plate 23 are stationary, the upper engaging plate 21 moves upward under the engagement limit of the lower engaging plate 23, and drives the rotary block 7, the movable seat 8, the fixed seat 6 and the entire workpiece to move upward. Then, when the upper engaging plate 21 moves to a position where it re-engages with the lower engaging plate 23, it automatically moves downward. Since the upper engaging plate 21 has a large number of teeth, the workpiece is subjected to back-and-forth vibration in the upper and lower directions during the bending and deformation process, thereby eliminating the stress inside it.

[0060] Finally, when the swivel 7 drives the movable seat 8 to rotate and reset, the swivel 7 drives the upper bite plate 21, the lower bite plate 23 and the clutch ring 22 to rotate clockwise. At this time, the clutch ring 22 pushes the abutment column 27 as a whole toward the inside of the reset groove 25 through the slot 24 opened on its outer surface, so that the clutch ring 22 can rotate and reset with the lower bite plate 23 and the upper bite plate 21, avoiding the swivel 7 from vibrating during rotation.

[0061] 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in 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 fixing seat (6), an upper bite disk (21) is fixedly connected to the bottom of the rotating block (7), a clutch ring (22) is movably installed on the top of the fixing platform (2), and a lower bite disk (23) is fixedly connected to the top of the clutch ring (22), the upper bite disk (21) and the lower bite disk (23) are engaged with each other, a reset groove (25) is provided on the top of the inner wall of the fixing platform (2), and a card slot is provided on the outer surface of the clutch ring (22). The inner wall of the reset groove (25) is fixedly connected with a fixed column (26), the outer surface of the fixed column (26) is movably sleeved with an abutting column (27), one end of the abutting column (27) abuts against the inner wall of the reset groove (25), and a spring 2 (28) is elastically connected between the outer side surface of the abutting column (27) and the inner wall of the reset groove (25). A workbench is provided on the rear side of the top of the base (1), and the cylinder 1 (3) is installed on the front side of the workbench. The telescopic end of one (3) is fixedly connected to a rack (4), the gear (19) is fixedly mounted on the middle of the outer surface of the rotating shaft (18), the spline (20) is fixedly mounted on the top of the rotating shaft (18), the rack (4) is meshed with the gear (19), the fixed seat (6) is located behind the movable seat (8), and a plurality of support mechanisms (5) are provided on the left rear side of the top of the base (1), and the support mechanism (5) includes a plurality of support columns ( 51), a plurality of support grooves (53) are provided at the bottom of the fixing seat (6), the support column (51) is adapted to be inserted into the interior of the support groove (53), a spring (52) is movably sleeved on the outer surface of the support column (51), the two ends of the spring (52) are elastically connected to the support groove (53) and the support column (51), and the top end of the support column (51) is in contact with 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.

2. A heat exchanger bending device with uniform force according to claim 1, 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) through a group of linear motors (11), the rear side of the fixed block (12) is installed with a second cylinder (13), the interior of the fixed block (12) is slidably installed with a slider (14) and a clamping block (15), 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) through another group of linear motors (11).

3. The heat exchanger bending device with uniform force according to claim 2, characterized in that: The inner wall of the movable seat (8) is movably connected with two groups of upper and lower steel balls (29), and the upper and lower ends of the support ring (9) are 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).

4. A heat exchanger bending device with uniform force according to claim 3, characterized in that: The second spring (28) applies pressure to the abutting column (27), causing the abutting column (27) to generate a torsional force that rotates around the fixed column (26) and approaches the inner wall of the reset groove (25).

5. The heat exchanger bending device with uniform force according to claim 4, 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).

6. The heat exchanger bending device with uniform force according to claim 5, characterized in that: A yielding groove is provided on one side of the abutting column (27) facing the reset groove (25). The number of the reset groove (25), the abutting column (27) and the clamping groove (24) is greater than four groups and is equidistantly distributed around the circumference.

7. The heat exchanger bending device with uniform force according to claim 6, characterized in that: A limiting ring (30) is fixedly mounted on the top of the fixed platform (2), wherein the axial cross-section of the limiting ring (30) is U-shaped, and the clutch ring (22) is adapted to be fitted on the inner wall of the limiting ring (30).

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