An aluminum flat tube following unwinding device

Abstract

The present invention relates to an aluminum flat tube following unwinding device, which includes an unwinder. A moving device is provided at the bottom of the unwinding rack. The device further includes a following guiding device, which includes a mounting plate. Fixed plates are fixed to the tops of both ends of the mounting plate. A support shaft parallel to the unwinding mandrel is fixedly connected between the two fixed plates. A nylon wear-resistant wheel is sleeved on the support shaft. Annular limiting flanges are provided on the outer sides of both ends of the nylon wear-resistant wheel. A sliding bearing is arranged inside the nylon wear-resistant wheel. Proximity sensors for monitoring the approach of the nylon wear-resistant wheel are provided on the fixed plates on both sides, and the proximity sensors are connected to a PLC controller. The present invention can move the aluminum flat tube coil axially during unwinding, and a following guiding device is provided. By using the proximity sensors installed on both sides, when the flat tube is payed out to the edge, the nylon wear-resistant wheel triggers the proximity sensor, and the moving structure of the flat tube is automatically reversed, which will not cause the flat tube to deviate more and more, the product will not be deformed, and the subsequent processing difficulty of the product is reduced.

Description

Technical Field

[0001] The present invention relates to an aluminum flat tube following unwinding device, belonging to the technical field of automatic unwinding. Background Art

[0002] The parallel flow porous aluminum flat tube can be used in automotive air conditioners and is an important component of automotive air conditioners. During the production process of the parallel flow porous aluminum flat tube, the conventional next process for the microchannel flat tube is to directly cut it according to the requirements of customers through a straightening, leveling and cutting device. After cutting, the flat tube is first assembled with headers, fins, and microchannel flat tubes and then sprayed, and then welded at high temperature. The disadvantages of such production are as follows: First, a large amount of flux is required, resulting in increased costs; second, the brazing filler metal splashes everywhere during spraying, deteriorating the working environment; third, the spraying is uneven, and local accumulation of solder increases the risk of product corrosion, or some parts are not sprayed, resulting in the risk of poor welding. Therefore, a pre-spraying process is added to the microchannel flat tubes we produce, that is, a very thin pre-sprayed brazing flux is sprayed on the surface of the flat tube before cutting. After cutting, there is no need to spray at the customer's place, and it can be directly assembled and welded at high temperature. In this way, multiple layers can directly enter the drying furnace, which can improve the efficiency at the customer's place and there is no need for the customer to spray, wasting a large amount of flux.

[0003] The coiled aluminum flat tube needs to be unwound on an unwinding device and then enter a spraying machine for spraying. The current unwinding device only unwinds in place. When the aluminum tube is unwound to both sides, it will cause the aluminum tube to twist and deform, affecting the product quality and increasing the difficulty of subsequent processing. Summary of the Invention

[0004] The present invention provides an aluminum flat tube following unwinding device to solve the problem that the current unwinding device only unwinds in place. When the aluminum tube is unwound to both sides, it will cause the aluminum tube to twist and deform, affecting the product quality and increasing the difficulty of subsequent processing.

[0005] The present invention relates to an aluminum flat tube follow-up unwinding device, which includes an unwinder. The unwinder includes an unwinding frame, on which an unwinding core shaft is rotatably installed. A limit disk is fixed on the unwinding core shaft. The rear side of the limit disk on the unwinding core shaft is connected to an unwinding reduction motor. At the front end of the bottom of the unwinding frame, two parallel vehicle frame plates are fixed. At the front end of the vehicle frame plates and the front end of the unwinding frame, moving wheels are rotatably installed. Below the moving wheels, there is a guide rail along the axial direction of the unwinding core shaft. The rear moving wheel is connected to a moving rotating shaft, and the moving rotating shaft is connected to a moving reduction motor. At the front end of the vehicle frame plates and the bottom of the rear end of the unwinding frame, position sensors are fixed. The position sensors are connected to a PLC controller, and the PLC controller is connected to the unwinding reduction motor and the moving reduction motor. The device further includes a follow-up guiding device. The follow-up guiding device includes a mounting plate. At the top of both ends of the mounting plate, fixing plates are fixed. Between the two fixing plates, a support shaft parallel to the unwinding core shaft is fixedly connected. A nylon wear-resistant wheel is sleeved on the support shaft. At the outer sides of both ends of the nylon wear-resistant wheel, annular limit flanges are provided. A sliding bearing is arranged inside the nylon wear-resistant wheel. On both sides of the fixing plates, proximity sensors for monitoring the approach of the nylon wear-resistant wheel are provided. The proximity sensors are connected to the PLC controller.

[0006] As a preference, a support plate is arranged below the mounting plate. At the bottom of the support plate, a support frame is fixed. In the middle of the mounting plate, a rotating shaft is fixed. The rotating shaft is rotatably installed on the support plate. At both ends of the mounting plate, adjusting arc holes coaxial with the rotating shaft are provided. In the adjusting arc holes, a locking bolt three is provided. The lower end of the locking bolt three is fixed on the support plate. When installing the mounting plate, the locking bolt three can be loosened, and then the mounting plate can be rotated around the rotating shaft to conveniently and quickly adjust the parallelism between the support shaft and the unwinding core shaft.

[0007] As a preference, at both ends of the inner hole of the nylon wear-resistant wheel, support concave platforms for supporting the sliding bearing are provided. The sliding bearing is divided into two parts from the middle. On the split surface of the sliding bearing, positioning convex columns and positioning concave holes are provided. At both sides of the nylon wear-resistant wheel, sealing gland covers fixed thereto are provided. When replacing the sliding bearing, the bolts on the sealing gland cover can be disassembled, then the sealing gland cover can be moved outwards, and then the sliding bearing can be taken outwards, so that the two split sliding bearings can be separated for replacement, achieving the replacement of the sliding bearing without disassembling the support shaft, which is more convenient and quick.

[0008] As a preference, a sealing groove one is provided in the inner hole of the sealing gland cover. In the sealing groove one, a sealing ring one is provided. At the outer end of the sliding bearing, a support flange is provided. On the inner side of the sealing gland cover, a support groove matching with the support flange is provided. On the sealing gland cover outside the support groove, a sealing groove two is provided. In the sealing groove two, a sealing ring two is provided. The sealing effect is better.

[0009] As a preference, at the rear end of the unwinding core shaft and the output end of the unwinding reduction motor, synchronous belt wheels are fixed. The two synchronous belt wheels are connected by a synchronous belt.

[0010] As a preference, an adjusting plate is fixed to the bottom of the unwinding deceleration motor. Perforations are provided at the four corners of the adjusting plate. Adjusting lead screws are provided in the perforations. The lower ends of the adjusting lead screws are fixed to the unwinding rack, and adjusting nuts are provided on the adjusting lead screws above and below the adjusting plate. The height position of the adjusting plate can be conveniently moved, thereby tightening the synchronous belt.

[0011] As a preference, anti - turnover flanges that are limited to both sides of the guide rail are provided on the outer sides of both ends of the moving wheel, and limit blocks are provided at the tops of both ends of the guide rail.

[0012] As a preference, vertical anti - turnover plates are provided on both sides of the bottom of the rear end of the unwinding rack. Anti - turnover guide wheels are rotatably installed at the lower ends of the anti - turnover plates. The tops of the anti - turnover guide wheels are in contact with the bottom of the guide rail. Anti - turnover flanges that are limited to both sides of the bottom of the guide rail are provided on the outer sides of both ends of the anti - turnover guide wheels. A strip - shaped hole one in the vertical direction is provided at the upper end of the anti - turnover plate. A locking bolt one is provided in the strip - shaped hole one, and the locking bolt one is fixed to the unwinding rack. Through the setting of the anti - turnover plate and the anti - turnover guide wheel, the front - turnover phenomenon caused by the excessive weight after the front - end unwinding mandrel is placed with an aluminum coil can be prevented, making it safer.

[0013] As a preference, inverted T - shaped leveling blocks are provided at both ends of each guide rail. A strip - shaped hole two in the vertical direction is provided at the upper part of the leveling block. A locking bolt two is provided in the strip - shaped hole two, and the locking bolt two is fixed to the guide rail. A leveling nut is fixed to the guide rail, and a leveling bolt is installed on the leveling nut. The lower end of the leveling bolt is in contact with the leveling block. The guide rail can be leveled more quickly.

[0014] The present invention has the following beneficial effects:

[0015] 1. By providing a moving structure that moves axially below the unwinding machine, the aluminum flat tube coil can be moved axially during unwinding, so that the unwinding position can be kept as straight as possible. And a follow - up guiding device is provided, which can move axially along the support shaft. Using the proximity sensors installed on both sides, when the flat tube is payed out to the edge, the nylon wear - resistant wheel with a sliding bearing triggers the proximity sensor, controlling the automatic commutation of the moving structure of the flat tube, which will not cause the flat tube to deviate more and more, the product will not be deformed, and the subsequent processing difficulty of the product is reduced.

[0016] 2. When installing the mounting plate, the locking bolt three can be loosened, and then the mounting plate can be rotated around the rotating shaft, conveniently and quickly adjusting the parallelism between the support shaft and the unwinding mandrel.

[0017] 3. When replacing the sliding bearing, the bolts on the sealing gland can be disassembled, then the sealing gland can be moved outwards, and then the sliding bearing can be taken outwards, so that the two - half sliding bearing can be separated for replacement, achieving the replacement of the sliding bearing without disassembling the support shaft, which is more convenient and fast.

[0018] 4. Through the setting of the anti - turnover plate and the anti - turnover guide wheel, the front - turnover phenomenon caused by the excessive weight after the front - end unwinding mandrel is placed with an aluminum coil can be prevented, making it safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a top view structural schematic diagram of the present invention;

[0020] Figure 2 is a front view structural schematic diagram of the unwinder;

[0021] Figure 3 is a left view structural schematic diagram of the unwinder;

[0022] Figure 4 is a three-dimensional structural schematic diagram of the unwinder;

[0023] Figure 5 is Figure 2 a structural schematic diagram of a part in

[0024] Figure 6 is Figure 4 an enlarged structural schematic diagram at position A in

[0025] Figure 7 is a top view structural schematic diagram of the follow-up guiding device;

[0026] Figure 8 is a left view structural schematic diagram of the follow-up guiding device;

[0027] Figure 9 is an installation structural schematic diagram of the nylon wear-resistant wheel;

[0028] Figure 10 is a structural schematic diagram of the sliding bearing;

[0029] In the figure: 1. Adjusting arc hole, 2. Support shaft, 3. Nylon wear-resistant wheel, 4. Mounting plate, 5. Proximity induction switch, 6. Aluminum flat tube, 7. Frame plate, 8. Guide rail, 9. Unwinding core shaft, 10. Limit disc, 11. Unwinding rack, 12. Synchronous belt pulley, 13. Limit block, 14. Leveling block, 15. Position sensor, 16. Unwinding reduction motor, 17. Moving reduction motor, 18. Second strip hole, 19. Leveling bolt, 20. Adjusting lead screw, 21. Adjusting plate, 22. Synchronous belt, 23. Moving wheel, 24. Anti-overturning plate, 25. Anti-overturning guide wheel, 26. Second locking bolt, 27. First strip hole, 28. Adjusting nut, 29. Anti-disengagement overturning edge, 30. First locking bolt, 31. Leveling nut, 32. Fixed plate, 33. Sealing gland, 34. Third locking bolt, 35. Rotating shaft, 36. Support frame, 37. Support plate, 38. Second sealing ring, 39. Support groove, 40. Support boss, 41. Support flange, 42. Sliding bearing, 43. First sealing ring, 44. Positioning convex column, 45. Positioning concave hole. DETAILED DESCRIPTION OF THE INVENTION

[0030] The present invention will be further described below in conjunction with embodiments.

[0031] Embodiment 1, as Figures 1 to 10 shown, the present invention is an aluminum flat tube following unwinding device, including an unwinder. The unwinder includes an unwinding frame 11, on which an unwinding mandrel 9 is rotatably installed. A limit disk 10 is fixed on the unwinding mandrel 9. The unwinding mandrel 9 behind the limit disk 10 is connected with an unwinding reduction motor 16. At the front end of the bottom of the unwinding frame 11, two parallel vehicle frame plates 7 are fixed. At the front ends of the vehicle frame plates 7 and the front end of the unwinding frame 11, moving wheels 23 are rotatably installed. Below the moving wheels 23, there is a guide rail 8 along the axial direction of the unwinding mandrel 9. The moving wheel 23 at the rear is connected with a moving rotating shaft, and the moving rotating shaft is connected with a moving reduction motor 17. At the front ends of the vehicle frame plates 7 and the bottom of the rear end of the unwinding frame 11, position sensors 15 are fixed. The position sensors 15 are connected with a PLC controller, and the PLC controller is connected with the unwinding reduction motor 16 and the moving reduction motor 17. The device further includes a follow-up guiding device. The follow-up guiding device includes a mounting plate 4. At the top ends of both ends of the mounting plate 4, fixing plates 32 are fixed. Between the two fixing plates 32, a support shaft 2 parallel to the unwinding mandrel 9 is fixedly connected. A nylon wear-resistant wheel 3 is sleeved on the support shaft 2. At the outer sides of both ends of the nylon wear-resistant wheel 3, annular limit flanges are provided. A sliding bearing 42 is arranged inside the nylon wear-resistant wheel 3. On both sides of the fixing plates 32, proximity sensors 5 for monitoring the approach of the nylon wear-resistant wheel 3 are provided. The proximity sensors 5 are connected with the PLC controller.

[0032] During operation, the aluminum flat tube 6 to be unwound is placed on the unwinding mandrel 9, and then it is expanded by the unwinding mandrel 9. The head above the coiled aluminum flat tube 6 is guided over the nylon wear-resistant wheel 3 and extends into the spraying equipment. Then, the unwinding reduction motor 16 and the moving reduction motor 17 are started. While unwinding, the moving reduction motor 17 drives the entire unwinder to move axially, so that the unwound aluminum flat tube 6 is in a straight line when entering the spraying equipment. The follow-up device can slide axially along the support shaft 2. By using the proximity sensors 5 installed on both sides, when the aluminum flat tube 6 is unwound to the edge, the nylon wear-resistant wheel 3 with the sliding bearing 42 triggers the proximity sensor 5, and then sends a signal to the PLC controller to control the reverse movement of the moving reduction motor 17, thereby automatically reversing the moving structure of the flat tube 6, preventing the aluminum flat tube 6 from deviating more and more, keeping the product unchanged in shape, and reducing the subsequent processing difficulty of the product.

[0033] Embodiment 2, on the basis of Embodiment 1, a support plate 37 is arranged below the mounting plate 4. At the bottom of the support plate 37, a support frame 36 is fixed. A rotating shaft 35 is fixed in the middle of the mounting plate 4. The rotating shaft 35 is rotatably installed on the support plate 37. At both ends of the mounting plate 4, adjusting arc holes 1 coaxial with the rotating shaft 35 are provided. In the adjusting arc holes 1, locking bolts three 34 are provided. The lower ends of the locking bolts three 34 are fixed on the support plate 37.

[0034] Before installing the entire servo device, loosen the nut on the locking bolt three 34, then rotate the mounting plate 4 around the rotating shaft 35, adjust until the support shaft 2 is parallel to the unwind core shaft 9, and then tighten the nut on the locking bolt three 34 to complete the adjustment.

[0035] At both ends of the inner hole of the nylon wear-resistant wheel 3, there are support concave platforms 40 for supporting the sliding bearing 42. The sliding bearing 42 is split into two from the middle. On the cut surface of the sliding bearing 42, there are positioning convex columns 44 and positioning concave holes 45. On both sides of the nylon wear-resistant wheel 3, there are sealing gland covers 33 fixed thereto.

[0036] In the inner hole of the sealing gland cover 33, there is a first sealing groove. Inside the first sealing groove, there is a first sealing ring 43. At the outer end of the sliding bearing 42, there is a support flange 41. Inside the sealing gland cover 33, there is a support groove 39 that cooperates with the support flange 41. On the sealing gland cover 33 outside the support groove 39, there is a second sealing groove. Inside the second sealing groove, there is a second sealing ring 38.

[0037] At the rear end of the unwind core shaft 9 and the output end of the unwind reduction motor 16, synchronous belt pulleys 12 are both fixed. The two synchronous belt pulleys 12 are connected by a synchronous belt 22.

[0038] At the bottom of the unwind reduction motor 16, an adjustment plate 21 is fixed. At the four corners of the adjustment plate 21, there are perforations. Inside the perforations, there are adjustment screw rods 20. The lower ends of the adjustment screw rods 20 are fixed to the unwind rack 11. On the adjustment screw rods 20 above and below the adjustment plate 21, there are adjustment nuts 28.

[0039] When adjusting the tension of the synchronous belt 22, the position of the upper and lower adjustment nuts 28 can be adjusted, thereby adjusting the height of the adjustment plate 21, and further adjusting the tension of the synchronous belt 22.

[0040] On both outer sides of the two ends of the moving wheel 23, there are anti - detachment flanges 29 that are limited on both sides of the guide rail 8. At the top of both ends of the guide rail 8, there are limit blocks 13.

[0041] On both sides of the bottom of the rear end of the unwind rack 11, there are vertical anti - overturning plates 24. At the lower end of the anti - overturning plate 24, an anti - overturning guide wheel 25 is rotatably installed. The top of the anti - overturning guide wheel 25 contacts the bottom of the guide rail 8. On both outer sides of the two ends of the anti - overturning guide wheel 25, there are anti - overturning flanges that are limited on both sides of the bottom of the guide rail 8. At the upper end of the anti - overturning plate 24, there is a first strip - shaped hole 27 in the vertical direction. Inside the first strip - shaped hole 27, there is a first locking bolt 30, and the first locking bolt 30 is fixed to the unwind rack 11. Anti - overturning structures are provided on both sides of the unwind rack 11.

[0042] When installing the anti - overturning plate 24, pass the first locking bolt 30 through the first strip - shaped hole 27, then screw on the nut, but do not tighten the nut. Then move the anti - overturning plate 24 along the vertical direction of the first strip - shaped hole 27 so that the lower anti - overturning guide wheel 25 is in close contact with the bottom of the guide rail 8.

[0043] At both ends of each guide rail 8, there are leveling blocks 14 in an inverted T shape. On the upper part of the leveling block 14, there is a strip-shaped hole two 18 in the vertical direction. In the strip-shaped hole two 18, there is a locking bolt two 26. The locking bolt two 26 is fixed on the guide rail 8. A leveling nut 31 is fixed on the guide rail 8. A leveling bolt 19 is installed on the leveling nut 31. The lower end of the leveling bolt 19 contacts the leveling block 14.

[0044] When leveling the guide rail 8, fix the locking bolt two 26 on the guide rail 8, then screw on the nut without tightening it. Then adjust the height of the leveling bolt 19 protruding, so as to adjust the height of the leveling block 14 until the guide rail 8 is leveled. After leveling, tighten the nut on the locking bolt two 26, and then fix the leveling block 14 on the ground by using the anchor bolts.

[0045] To sum up, the present invention can move the aluminum flat tube coil axially during unwinding by arranging a moving structure that moves axially below the unwinding machine, so that the unwinding position can be kept as straight as possible. And a follow-up guiding device is set, which can move axially along the support shaft. By using the proximity sensors installed on both sides, when the flat tube is paid out to the edge, the nylon wear-resistant wheel with a sliding bearing triggers the proximity sensor, controlling the moving structure of the flat tube to automatically reverse, which will not cause the flat tube to deviate more and more, the product will not be deformed, and the subsequent processing difficulty of the product is reduced. When installing the mounting plate, the locking bolt three can be loosened, and then the mounting plate can be rotated around the rotating shaft, conveniently and quickly adjusting the parallelism between the support shaft and the unwinding mandrel. When replacing the sliding bearing, the bolts on the sealing gland can be disassembled, then the sealing gland can be moved outwards, and then the sliding bearing can be taken outwards, so that the two halves of the sliding bearing can be separated for replacement, achieving the replacement of the sliding bearing without disassembling the support shaft, which is more convenient and fast. Through the setting of the anti-turning plate and the anti-turning guide wheel, the phenomenon of forward turning caused by the excessive weight after the front-end unwinding mandrel is put into the aluminum coil can be prevented, which is safer.

[0046] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0047] In the description of the present invention, the orientation or positional relationship indicated by the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention.

Claims

1. An aluminum flat tube following unwinding device, comprising an unwinder, the unwinder including an unwinding frame (11), on which an unwinding mandrel (9) is rotatably installed, a limiting disc (10) is fixed on the unwinding mandrel (9), and an unwinding reduction motor (16) is connected to the unwinding mandrel (9) behind the limiting disc (10). It is characterized in that: At the front end of the bottom of the unwinding frame (11), two parallel vehicle frame plates (7) are fixed. At the front ends of the vehicle frame plates (7) and the front end of the unwinding frame (11), moving wheels (23) are rotatably installed. Below the moving wheels (23), there is a guide rail (8) along the axial direction of the unwinding mandrel (9). The moving wheel (23) at the rear is connected to a moving rotating shaft, and the moving rotating shaft is connected to a moving reduction motor (17). Position sensors (15) are fixed at the front ends of the vehicle frame plates (7) and the bottom of the rear end of the unwinding frame (11). The position sensors (15) are connected to a PLC controller, and the PLC controller is connected to the unwinding reduction motor (16) and the moving reduction motor (17). The device also includes a follow-up guiding device, which includes a mounting plate (4). At the top ends of both ends of the mounting plate (4), fixing plates (32) are fixed. Between the two fixing plates (32), a support shaft (2) parallel to the unwinding mandrel (9) is fixedly connected. A nylon wear-resistant wheel (3) is sleeved on the support shaft (2). At the outer sides of both ends of the nylon wear-resistant wheel (3), there are annular limiting flanges. Inside the nylon wear-resistant wheel (3), there is a sliding bearing (42). On both sides of the fixing plates (32), proximity sensors (5) for monitoring the approach of the nylon wear-resistant wheel (3) are provided, and the proximity sensors (5) are connected to the PLC controller; below the mounting plate (4), there is a support plate (37). At the bottom of the support plate (37), a support frame (36) is fixed. In the middle of the mounting plate (4), a rotating shaft (35) is fixed, and the rotating shaft (35) is rotatably installed on the support plate (37). At both ends of the mounting plate (4), adjusting arc holes (1) coaxial with the rotating shaft (35) are provided. Inside the adjusting arc holes (1), a locking bolt three (34) is provided, and the lower end of the locking bolt three (34) is fixed on the support plate (37); at both ends of the inner hole of the nylon wear-resistant wheel (3), there are support bosses (40) for supporting the sliding bearing (42). The sliding bearing (42) is split in half from the middle. On the split surface of the sliding bearing (42), there are positioning convex columns (44) and positioning concave holes (45). On both sides of the nylon wear-resistant wheel (3), there are sealing gland covers (33) fixed thereto.

2. An aluminum flat tube following unwinding device according to claim 1, It is characterized in that: In the inner hole of the sealing gland cover (33), there is a first sealing groove, and in the first sealing groove, there is a first sealing ring (43). At the outer end of the sliding bearing (42), there is a support flange (41). On the inner side of the sealing gland cover (33), there is a support groove (39) cooperating with the support flange (41). On the sealing gland cover (33) outside the support groove (39), there is a second sealing groove, and in the second sealing groove, there is a second sealing ring (38).

3. An aluminum flat tube following unwinding device according to claim 2, It is characterized in that: A synchronous pulley (12) is fixed to the rear end of the unwinding mandrel (9) and the output end of the unwinding reduction motor (16). The two synchronous pulleys (12) are connected by a synchronous belt (22).

4. An aluminum flat tube following unwinding device according to claim 3, wherein: A regulating plate (21) is fixed to the bottom of the unwinding reduction motor (16). Perforations are provided at the four corners of the regulating plate (21). Adjusting screw rods (20) are provided in the perforations. The lower ends of the adjusting screw rods (20) are fixed to the unwinding rack (11). Adjusting nuts (28) are provided on the adjusting screw rods (20) above and below the regulating plate (21).

5. An aluminum flat tube following unwinding device according to claim 4, wherein: Anti - turnover edges (29) that are limited to both sides of the guide rail (8) are provided on the outer sides of both ends of the moving wheel (23). Limit blocks (13) are provided at the top of both ends of the guide rail (8).

6. An aluminum flat tube following unwinding device according to claim 5, wherein: Vertical anti - turnover plates (24) are provided on both sides of the bottom of the rear end of the unwinding rack (11). An anti - turnover guide wheel (25) is rotatably installed at the lower end of the anti - turnover plate (24). The top of the anti - turnover guide wheel (25) contacts the bottom of the guide rail (8). Anti - turnover edges that are limited to both sides of the bottom of the guide rail (8) are provided on the outer sides of both ends of the anti - turnover guide wheel (25). A vertical strip - shaped hole one (27) is provided at the upper end of the anti - turnover plate (24). A locking bolt one (30) is provided in the strip - shaped hole one (27). The locking bolt one (30) is fixed to the unwinding rack (11).

7. An aluminum flat tube following unwinding device according to claim 1, wherein: Inverted T - shaped leveling blocks (14) are provided at both ends of each guide rail (8). Vertical strip - shaped holes two (18) are provided in the upper part of the leveling blocks (14). Locking bolts two (26) are provided in the strip - shaped holes two (18). The locking bolts two (26) are fixed to the guide rail (8). A leveling nut (31) is fixed to the guide rail (8). A leveling bolt (19) is installed on the leveling nut (31). The lower end of the leveling bolt (19) contacts the leveling block (14).

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