A positioning device for automated welding of iron towers

Abstract

This invention relates to the field of welding positioning, specifically to a positioning device for automated welding of iron towers. It includes a pneumatic slide table at the end of a positioning platform, an extension mechanism rotatably connected above the pneumatic slide table to support the inner wall of the tower, a clamp in the middle of the positioning platform for rotating and positioning the outer wall of the tower, limit frames on both sides of the clamp, a clamping mechanism with two pressure plates at the upper end of the positioning platform, and rubber rollers rotatably connected at equal intervals on the side of the two pressure plates that are close together. The rubber rollers guide and position the flange reinforcement between the two pressure plates. A wedge block is also provided on the side of the two pressure plates that, after movement, clamps the side of the flange reinforcement. Above the wedge block is a fastening mechanism with an inclined abutment rod, which reinforces and clamps the side of the flange reinforcement. This device can achieve stable positioning and rotation of the tower, ensure accurate positioning of the flange reinforcement, avoid welding interference, improve the welding quality and efficiency of the iron tower and flange reinforcement, and is suitable for automated welding operations on iron towers.

Description

Technical Field

[0001] This invention relates to the field of welding positioning, specifically to a positioning device for automated welding of iron towers. Background Technology

[0002] In the automated welding production of tower sections and flange reinforcement, the performance of the positioning device directly determines the welding quality and efficiency. However, current positioning devices have many key defects, which seriously restrict the stability and accuracy of production operations. Existing devices struggle to achieve stable rotation of the tower section. When multiple circumferentially distributed flange reinforcements need to be welded to the outer wall of the tower section, the tower section position must be frequently disassembled and readjusted manually. This not only involves cumbersome procedures and consumes a lot of manpower and time, but also easily leads to positioning deviations during multiple adjustments, resulting in inaccurate welding positions of subsequent flange reinforcements, reducing overall welding accuracy, and failing to meet the high-precision assembly requirements of tower components.

[0003] When welding multiple flanges sequentially, the existing equipment lacks a proper guiding and clamping mechanism. After the operator places the flange on the welding position on the outer wall of the tower, due to the lack of an effective guiding structure, the flange is easily misaligned by external forces or its own weight, making it difficult to accurately align with the welding position. At this point, the operator needs to spot weld the flange to prevent it from shifting during subsequent welding. However, this process results in the flange not being able to achieve a completely tight fit with the outer wall of the tower. After welding, small gaps are easily formed between the flange and the tower, significantly reducing the strength and sealing of the welded joint. During long-term use of the tower, corrosion or stress concentration can easily occur at these gaps, shortening the service life of the tower and posing a safety hazard.

[0004] In addition, due to the lack of reasonable avoidance design between the flange reinforcement and the positioning components of the existing equipment and the welding torch operating area, the position of the positioning components needs to be manually adjusted in real time. This not only increases manual operation costs but also frequently interrupts the welding process, reducing welding efficiency. At the same time, the positioning components of the existing equipment have poor position adjustment flexibility, only adapting to a single specification of tower tube and flange reinforcement. When producing tower components of different sizes, the entire positioning device needs to be replaced, increasing the company's equipment investment costs and reducing the versatility and economy of production.

[0005] Therefore, it is necessary to design a positioning device for automated welding of iron towers. Summary of the Invention

[0006] Therefore, it is necessary to provide a positioning device for automated welding of iron towers to address the problems of existing technologies.

[0007] To address the problems in the existing technology, the technical solution adopted by this invention is as follows:

[0008] A positioning device for automated welding of iron towers, comprising:

[0009] A pneumatic slide is set at the end of the positioning platform. An extension mechanism is rotatably connected above the pneumatic slide. When the extension mechanism is activated, it tightens the inner wall of the tower from the inside out.

[0010] The positioning platform is equipped with a clamp for rotating and positioning the outer wall of the tower. Limiting frames are provided on both sides of the clamp. The upper part of the positioning platform is equipped with a clamping mechanism for initially positioning the flange rib. The clamping mechanism includes two pressure plates. Rubber rollers are rotatably connected at equal intervals on the side of the two pressure plates that are close to each other. The rubber rollers guide and position the flange rib between the two pressure plates. A wedge block is also provided on the side of the two pressure plates that is close to each other to clamp the side of the flange rib after movement.

[0011] Above the wedge is a fastening mechanism for fixing the flange reinforcement. The fastening mechanism includes an inclined abutment rod, which, when moved, reinforces and tightens the side of the flange reinforcement.

[0012] Furthermore, a bracket is fixedly connected to the upper end of the output end of the pneumatic slide, and a turntable is rotatably connected to the middle of the bracket. The turntable is fixedly connected to the expansion mechanism.

[0013] The main motor is fixedly connected to the lower part of the support. The main gear is fixedly connected to the output end of the main motor on the same axis. The gear ring is fixedly connected to the turntable on the same axis. The main gear meshes with the gear ring.

[0014] Furthermore, the output end of the fixture is connected to several limit wheels at equal angles.

[0015] Furthermore, a support plate is fixedly connected to the upper end of the limit frame, and two electric slides are slidably connected to the lower end of the support plate. The two electric slides are fixedly connected to two pressure plates respectively.

[0016] Furthermore, a main cylinder is fixedly connected to the middle of the lower end of the pallet, and the output end of the main cylinder is fixedly connected to the wedge block.

[0017] Furthermore, the fastening mechanism also includes a secondary cylinder fixedly connected to the upper end of the pallet. The secondary cylinder has a support frame fixedly connected to the pallet on both sides. The output end of the secondary cylinder is fixedly connected to a limiting arc frame that is slidably connected to the support frame. The stop rod is located in the middle of the limiting arc frame.

[0018] Furthermore, auxiliary motors are fixedly connected to the outer walls on both sides of the limiting arc frame, and auxiliary gears are rotatably connected to the inner walls on both sides of the limiting arc frame. The auxiliary gears are coaxially fixedly connected to the output end of the auxiliary motors.

[0019] Arc-shaped plates are slidably connected to the inner walls on both sides of the limiting arc frame. Arc-shaped racks are fixed to the upper ends of the arc-shaped plates and mesh with the auxiliary gears.

[0020] Furthermore, limiting arc holes are formed on both sides of the limiting arc frame, and the two arc plates are slidably connected to the limiting arc holes by pins.

[0021] Furthermore, a positioning plate is provided on the side of the two curved plates that are close to each other, and the two ends of the positioning plate are fixedly connected to the two curved plates respectively.

[0022] A secondary cylinder is fixedly connected to the middle of the positioning plate, and the output end of the secondary cylinder is fixedly connected to the push rod.

[0023] Furthermore, an anti-slip pad is fixed to the end of the stop rod away from the secondary cylinder.

[0024] The beneficial effects of this invention compared to the prior art are:

[0025] Firstly, this device solves the problem that existing devices, which only externally clamp the tower, are prone to deformation and have difficulty in stable rotation. This device uses a pneumatic slide to drive the expansion mechanism to support the tower from the inside, and the main motor drives the turntable to rotate the expansion mechanism, so as to achieve stable rotation of the tower. There is no need to frequently adjust the position of the tower, which reduces positioning deviation and improves welding accuracy. At the same time, the internal support method avoids the tower from deforming due to uneven external clamping force, ensuring the appearance and structural integrity of the tower.

[0026] Secondly, in this device, the rubber roller of the clamping mechanism guides and limits the flange reinforcement, and the wedge further clamps it, ensuring that the flange reinforcement is tightly attached to the outer wall of the tower, avoiding the generation of welding gaps, improving welding strength, and the clamping rod of the fastening mechanism can reinforce and clamp the flange reinforcement, preventing the flange reinforcement from shifting during welding, further ensuring welding quality, and solving the problem of unstable flange reinforcement positioning in existing devices.

[0027] Thirdly, this device uses an electric slide to move the pressure plate and the main cylinder to control the extension and retraction of the wedge. During welding, the pressure plate and wedge can be kept away from the flange reinforcement to avoid interference with the welding torch. No manual adjustment is required, reducing labor costs and improving welding efficiency. In addition, the setting of auxiliary cylinders, secondary cylinders and other drive components makes the position adjustment of the positioning component more flexible, adapting to different specifications of towers and flange reinforcement, enhancing versatility and reducing the company's equipment investment. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment;

[0029] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;

[0030] Figure 3 This is a three-dimensional exploded view of the embodiment from another angle;

[0031] Figure 4 yes Figure 3 Enlarged view of the structure at point B in the middle;

[0032] Figure 5 This is a partial structural diagram of an embodiment;

[0033] Figure 6 yes Figure 5 Enlarged view of the structure at point C;

[0034] Figure 7 yes Figure 5 Enlarged view of the structure at point D;

[0035] Figure 8 This is a three-dimensional structural diagram of the inclined block and the abutment in the embodiment;

[0036] Figure 9 This is a three-dimensional structural diagram of the auxiliary gear and the arc-shaped rack in the embodiment.

[0037] The numbers on the map are:

[0038] 1. Extension mechanism; 2. Pneumatic slide table; 3. Main motor; 4. Main gear; 5. Gear ring; 6. Bracket; 7. Turntable; 8. Positioning table; 9. Limiting frame; 10. Fixture; 11. Limiting wheel; 12. Support plate; 13. Electric slide table; 14. Pressure plate; 15. Rubber roller; 16. Main cylinder; 17. Wedge block; 18. Auxiliary cylinder; 19. Bearing frame; 20. Limiting arc frame; 21. Limiting arc hole; 22. Pin; 23. Arc plate; 24. Arc rack; 25. Auxiliary gear; 26. Auxiliary motor; 27. Positioning plate; 28. Secondary cylinder; 29. ​​Support rod; 30. Anti-slip pad. Detailed Implementation

[0039] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0040] refer to Figures 1 to 9 A positioning device for automated welding of iron towers, comprising:

[0041] A pneumatic slide 2 is set at the end of the positioning platform 8. An extension mechanism 1 is rotatably connected above the pneumatic slide 2. When the extension mechanism 1 is activated, it supports the inner wall of the tower from the inside out.

[0042] The positioning platform 8 is provided with a clamp 10 in the middle for rotating and positioning the outer wall of the tower. The clamp 10 is provided with a limit frame 9 on both sides. The upper end of the positioning platform 8 is provided with a clamping mechanism for initially positioning the flange rib. The clamping mechanism includes two pressure plates 14. The two pressure plates 14 are rotatably connected to a rubber roller 15 at equal intervals on the side close to each other. The rubber roller 15 guides and positions the flange rib between the two pressure plates 14. The two pressure plates 14 are also provided with a wedge 17 on the side close to each other for clamping the side of the flange rib after movement.

[0043] Above the wedge block 17 is a fastening mechanism for fixing the flange reinforcement. The fastening mechanism includes an inclined abutment rod 29. After the abutment rod 29 moves, it reinforces and tightens the side of the flange reinforcement.

[0044] When welding flange reinforcements on the tower, the operator first places the tower in the middle of the clamp 10. Then, the pneumatic slide 2 is activated and drives the extension mechanism 1 to extend into the tower. After the extension mechanism 1 is activated, it will tighten the inner wall of the tower from the inside out. Then, several flange reinforcements are placed in sequence on the welding position on the outer wall of the tower. After the welding torch finishes welding the placed flange reinforcements, the extension mechanism 1 rotates as a whole and drives the tower to rotate, so as to transfer the welding position of the next flange reinforcement to the tower. The above process is repeated until all flange reinforcements are successfully welded.

[0045] Once the flange reinforcement is placed on the welding position, the two pressure plates 14 in the clamping mechanism roll and limit the flange reinforcement on both sides via several rubber rollers 15 to prevent displacement during initial positioning. Subsequently, the wedge block 17 moves and clamps the sides of the flange reinforcement. The movement of the wedge block 17 pushes the flange reinforcement to ensure a tight fit between the flange reinforcement and the outer wall of the tower. Then, the fastening mechanism is activated, driving the abutment rod 29 to clamp the flange reinforcement from top to bottom. The wedge block 17 and the two pressure plates 14 move away from the flange reinforcement to prevent interference with the welding torch during welding.

[0046] In order to drive the expansion mechanism 1 to rotate, and thus ensure that after the expansion mechanism 1 tightens the inner wall of the tower, it can drive the tower to rotate, so that the operator can weld the flange reinforcement to the outer wall of the tower in sequence, the following features are also provided:

[0047] like Figure 3 As shown, a bracket 6 is fixedly connected to the upper end of the output end of the pneumatic slide table 2, and a turntable 7 is rotatably connected to the middle of the bracket 6. The turntable 7 is fixedly connected to the expansion mechanism 1.

[0048] The main motor 3 is fixedly connected to the lower part of the bracket 6. The main gear 4 is fixedly connected to the output end of the main motor 3 on the same axis. The gear ring 5 is fixedly connected to the turntable 7 on the same axis. The main gear 4 meshes with the gear ring 5.

[0049] After the main motor 3 starts, the main motor 3 drives the main gear 4 to rotate. The main gear 4 meshes with the gear ring 5 fixed to the turntable 7, thereby driving the turntable 7 to rotate in the middle of the support 6, thus realizing the synchronous rotation of the extension mechanism 1 and completing the rotation function of the extension mechanism 1 after supporting the tower.

[0050] To ensure that there is no excessive resistance between the tower and the clamp 10 when the extension mechanism 1 drives the tower to rotate, the following features are specifically provided:

[0051] like Figure 7 As shown, the output end of the clamp 10 is rotatably connected to several limit wheels 11 at equal angles.

[0052] When the tower is rotated by the extension mechanism 1, the outer wall of the tower contacts the limiting wheel 11 of the clamp 10. The limiting wheel 11 rolls with the rotation of the tower, converting sliding friction into rolling friction, which greatly reduces the resistance between the tower and the clamp 10.

[0053] In order to move the two pressure plates 14 and prevent interference with the welding torch during welding of the flange reinforcement, the following features are specifically provided:

[0054] like Figure 4 As shown, a support plate 12 is fixedly connected to the upper end of the limiting frame 9, and two electric slides 13 are slidably connected to the lower end of the support plate 12. The two electric slides 13 are fixedly connected to two pressure plates 14 respectively.

[0055] When the position of the pressure plate 14 needs to be adjusted, the electric slide table 13 slides at the lower end of the support plate 12, driving the pressure plate 14 fixed thereto to move, so that the pressure plate 14 can move closer to or further away from the flange rib, avoiding interference with the welding torch during welding.

[0056] In order for the wedge block 17 to contact the flange reinforcement and initially tighten the flange after the flange reinforcement is guided and limited by the two pressure plates 14, the following features are specifically provided:

[0057] like Figure 8 As shown, a main cylinder 16 is fixedly connected to the middle of the lower end of the support plate 12, and the output end of the main cylinder 16 is fixedly connected to the wedge block 17.

[0058] After the flange rib is guided and limited by the pressure plate 14, the main cylinder 16 is started, and its output end pushes the wedge block 17 to move towards the flange rib, so that the wedge block 17 contacts and abuts against the side of the flange rib, completing the initial fixation.

[0059] In order to adjust the initial position of the stop 29 in the horizontal direction, the following features are also provided:

[0060] like Figure 8 As shown, the fastening mechanism also includes an auxiliary cylinder 18 fixedly connected to the upper end of the support plate 12. The two sides of the auxiliary cylinder 18 are respectively provided with a support frame 19 fixedly connected to the support plate 12. The output end of the auxiliary cylinder 18 is fixedly connected to a limiting arc frame 20 that is slidably connected to the support frame 19. The abutment 29 is located in the middle of the limiting arc frame 20.

[0061] When adjusting the initial horizontal position of the stop rod 29, the auxiliary cylinder 18 is activated, pushing the limiting arc frame 20 to slide along the support frame 19. The limiting arc frame 20 drives the stop rod 29 to move synchronously until the stop rod 29 reaches the preset horizontal position.

[0062] In order to change the tilt angle of the abutment 29 so that it can be pressed against the side of the flange after it moves, the following features are also provided:

[0063] like Figure 8 and Figure 9 As shown, auxiliary motors 26 are fixedly connected to the outer walls on both sides of the limiting arc frame 20, and auxiliary gears 25 are rotatably connected to the inner walls on both sides of the limiting arc frame 20. The output ends of the auxiliary gears 25 and auxiliary motors 26 are fixedly connected to each other on the same axis.

[0064] Arc-shaped plates 23 are slidably connected to the inner walls on both sides of the limiting arc frame 20. Arc-shaped racks 24 are fixedly connected to the upper ends of the arc plates 23, and the arc-shaped racks 24 mesh with the secondary gears 25.

[0065] When the tilt angle of the stop rod 29 is changed, the auxiliary motor 26 starts and drives the auxiliary gear 25 to rotate. The auxiliary gear 25 drives the arc plate 23 to move through the arc rack 24. When the arc plate 23 slides along the inner wall of the limiting arc frame 20, it drives the stop rod 29 to adjust the tilt angle.

[0066] To improve the stability of the curved plate 23, the following features are also provided:

[0067] like Figure 2 and Figure 8 As shown, limiting arc holes 21 are formed on both sides of the limiting arc frame 20, and the two arc plates 23 are slidably connected to the limiting arc holes 21 by pins 22.

[0068] During the sliding process of the arc plate 23, the pin 22 slides synchronously within the limiting arc hole 21, which restricts the sliding trajectory of the arc plate 23, prevents the arc plate 23 from deviating, and ensures the stability of the arc plate 23 when it moves.

[0069] To ensure that the stop bar 29 can move along its own long side, the following features are also provided:

[0070] like Figure 8 As shown, a positioning plate 27 is provided on the side where the two arc-shaped plates 23 are close to each other, and the two ends of the positioning plate 27 are respectively fixedly connected to the two arc-shaped plates 23.

[0071] The secondary cylinder 28 is fixedly connected to the middle of the positioning plate 27, and the output end of the secondary cylinder 28 is fixedly connected to the push rod 29.

[0072] When the abutment rod 29 needs to move along the long side to achieve precise clamping, the secondary cylinder 28 is activated, and its output end pushes the abutment rod 29 to extend or retract, so that the abutment rod 29 can precisely clamp or disengage from the side of the flange rib.

[0073] To enhance the friction between the end of the abutment 29 and the side of the flange rib, the following features are specifically provided:

[0074] like Figure 2 As shown, an anti-slip pad 30 is fixedly connected to the end of the stop rod 29 away from the secondary cylinder 28.

[0075] When the abutment rod 29 is pressed against the side of the flange rib, the anti-slip pad 30 is in direct contact with the flange rib, increasing the friction between the end of the abutment rod 29 and the flange rib, preventing the abutment rod 29 from sliding relative to the flange rib, and ensuring the pressing effect.

[0076] The detailed working principle of this device is as follows: When welding the tower cylinder and flange reinforcement, the operator first places the tower cylinder to be welded on the clamp 10 in the middle of the positioning platform 8. The clamp 10 provides initial rotational positioning for the outer wall of the tower cylinder, ensuring that the tower cylinder will not shift significantly during subsequent operations. Subsequently, the pneumatic slide 2 is activated, and its output end drives the upper rotating extension mechanism 1 to slowly penetrate into the tower cylinder. When the extension mechanism 1 reaches the preset position inside the tower cylinder, it is activated and unfolds from the inside out, uniformly tightening the inner wall of the tower cylinder. This internal tightening method ensures the stable fixation of the tower cylinder and avoids the tower cylinder deformation problems that may be caused by external clamping.

[0077] After the tower is stably tightened, the operator places several flange reinforcements sequentially on the preset welding positions on the outer wall of the tower. At this time, the clamping mechanism starts working. The two electric slides 13 at the lower end of the upper support plate 12 of the limiting frame 9 are activated, driving the two pressure plates 14 fixed thereto to move towards the flange reinforcements until the rubber rollers 15 on the side of the pressure plates 14 contact the two sides of the flange reinforcements. The rubber rollers 15 guide and limit the flange reinforcements by rolling, effectively preventing the flange reinforcements from shifting during the initial positioning stage and ensuring that the flange reinforcements are accurately aligned with the welding positions. Immediately afterwards, the main cylinder 16 in the middle of the upper end of the support plate 12 is activated. Its output end pushes the wedge block 17 to move towards the side of the flange reinforcement. After the wedge block 17 contacts the side of the flange reinforcement, it continues to apply pressure, pushing the flange reinforcements towards the outer wall of the tower until the flange reinforcements are tightly fitted against the outer wall of the tower, completing the initial clamping and positioning of the flange reinforcements.

[0078] After initial positioning, the welding torch begins welding the first flange reinforcement. During welding, to prevent interference from the clamping mechanism components, the electric slide 13 moves the two pressure plates 14 away from the flange reinforcement, while the main cylinder 16 retracts the wedge block 17, disengaging both the pressure plates 14 and the wedge block 17 from the flange reinforcement area. This ensures smooth welding operation without any structural obstruction. After the first flange reinforcement is welded, the next flange reinforcement needs to be welded. This requires rotating the tower to switch welding positions. The main motor 3 starts and drives the main gear 4 to rotate. The main gear 4 meshes with the gear ring 5, which is coaxially connected to the turntable 7, driving the turntable 7 to rotate in the middle of the support 6. The turntable 7 is fixed to the extension mechanism 1, so the extension mechanism 1 rotates synchronously with the turntable 7. The extension mechanism 1 remains in a state of supporting the inner wall of the tower, thus causing the tower to rotate as well. During the rotation of the tower, several limiting wheels 11 at the output end of the clamp 10 near one end of the tower roll with the rotation of the tower, converting the sliding friction between the tower and the clamp 10 into rolling friction, which greatly reduces the rotational resistance. This not only avoids wear on the surface of the tower caused by friction, but also ensures the stability of the tower rotation, ensuring that the welding position of the next flange reinforcement can be accurately transferred to the welding gun operation area.

[0079] After the tower rotates to the next welding position, the fastening mechanism is activated to reinforce and tighten the newly placed flange reinforcement. First, the auxiliary cylinder 18 at the upper end of the support plate 12 is activated, and its output end pushes the limiting arc frame 20 to slide along the two side support frames 19, adjusting the horizontal position of the limiting arc frame 20, which in turn drives the middle abutment rod 29 to the preset abutment position on the side of the flange reinforcement, thereby adjusting the initial horizontal position of the abutment rod 29. If the tilt angle of the abutment rod 29 does not meet the clamping requirements, the auxiliary motor 26 on both sides of the outer wall of the limiting arc frame 20 starts, driving the auxiliary gear 25, which is coaxially connected to the output end, to rotate. The auxiliary gear 25 meshes with the arc rack 24 at the upper end of the arc plate 23, driving the arc plate 23 to slide along the inner wall of the limiting arc frame 20. During the sliding process of the arc plate 23, the pin 22 at its end slides synchronously in the limiting arc hole 21 of the limiting arc frame 20 to ensure the stability of the movement of the arc plate 23. The arc plate 23 drives the abutment rod 29 associated with it to adjust the tilt angle until the abutment rod 29 can be accurately aligned with the clamping point on the side of the flange rib.

[0080] After the tilt angle adjustment is completed, the secondary cylinder 28 in the middle of the positioning plate 27 is activated. Its output end pushes the abutment rod 29 to move along its long side towards the side of the flange rib. After the anti-slip pad 30 at the end of the abutment rod 29 away from the secondary cylinder 28 contacts the side of the flange rib, the secondary cylinder 28 continues to apply thrust, so that the abutment rod 29 reinforces and tightens the side of the flange rib, ensuring that the flange rib will not shift due to external force during the welding process. At this time, the welding torch is activated again to perform welding operations on the flange rib. During the welding process, the pressure plate 14 and wedge block 17 of the clamping mechanism are always kept away from the flange rib to avoid interference with the welding torch.

[0081] Repeat the above operation process: the expansion mechanism 1 drives the tower to rotate and switch welding positions, the fastening mechanism reinforces and tightens the new flange reinforcement, and the welding torch performs welding until all flange reinforcements are welded. After all welding operations are completed, the expansion mechanism 1 stops tightening and retracts, the pneumatic slide 2 drives the expansion mechanism 1 to retract from the inside of the tower, and the operator removes the welded tower from the clamp 10. The entire automated welding and positioning operation of the iron tower is completed.

[0082] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A positioning device for automated welding of iron towers, characterized in that, include: A pneumatic slide (2) is set at the end of the positioning platform (8). An extension mechanism (1) is rotatably connected above the pneumatic slide (2). When the extension mechanism (1) is started, it tightens the inner wall of the tower from the inside to the outside. The positioning platform (8) is provided with a clamp (10) in the middle for rotating and positioning the outer wall of the tower. The clamp (10) is provided with a limit frame (9) on both sides. The upper end of the positioning platform (8) is provided with a clamping mechanism for preliminary positioning of the flange reinforcement. The clamping mechanism includes two pressure plates (14). The two pressure plates (14) are connected to a rubber roller (15) at equal intervals on the side close to each other. The rubber roller (15) guides and positions the flange reinforcement between the two pressure plates (14). The two pressure plates (14) are also provided with a wedge (17) on the side close to each other to clamp the side of the flange reinforcement after movement. A fastening mechanism for fixing the flange reinforcement is provided above the wedge (17). The fastening mechanism includes an inclined abutment (29). After the abutment (29) moves, it reinforces and tightens the side of the flange reinforcement. The fastening mechanism also includes an auxiliary cylinder (18) fixedly connected to the upper end of the support plate (12). The two sides of the auxiliary cylinder (18) are respectively provided with a support frame (19) fixedly connected to the support plate (12). The output end of the auxiliary cylinder (18) is fixedly connected to a limiting arc frame (20) which is slidably connected to the support frame (19). The abutment (29) is located in the middle of the limiting arc frame (20). A secondary motor (26) is fixedly connected to the outer walls on both sides of the limiting arc frame (20), and a secondary gear (25) is rotatably connected to the inner walls on both sides of the limiting arc frame (20). The secondary gear (25) is coaxially fixedly connected to the output end of the secondary motor (26). Arc plates (23) are slidably connected to the inner walls on both sides of the limiting arc frame (20). Arc racks (24) are fixedly connected to the upper end of the arc plates (23). The arc racks (24) mesh with the auxiliary gears (25). A positioning plate (27) is provided on one side of the two arc-shaped plates (23) that are close to each other, and the two ends of the positioning plate (27) are fixedly connected to the two arc-shaped plates (23) respectively; The middle part of the positioning plate (27) is fixedly connected to the secondary cylinder (28), and the output end of the secondary cylinder (28) is fixedly connected to the push rod (29).

2. The positioning device for automated welding of iron towers according to claim 1, characterized in that, A bracket (6) is fixedly connected to the upper end of the output end of the pneumatic slide (2), and a turntable (7) is rotatably connected to the middle of the bracket (6). The turntable (7) is fixedly connected to the expansion mechanism (1). The main motor (3) is fixedly connected to the lower part of the bracket (6). The main gear (4) is fixedly connected to the output end of the main motor (3) on the same axis. The gear ring (5) is fixedly connected to the turntable (7) on the same axis. The main gear (4) meshes with the gear ring (5).

3. The positioning device for automated welding of iron towers according to claim 1, characterized in that, The output end of the fixture (10) is connected to several limit wheels (11) at equal angles.

4. The positioning device for automated welding of iron towers according to claim 1, characterized in that, The upper end of the limiting frame (9) is fixedly connected to a support plate (12), and the lower end of the support plate (12) is slidably connected to two electric slides (13), which are respectively fixedly connected to two pressure plates (14).

5. A positioning device for automated welding of iron towers according to claim 4, characterized in that, The main cylinder (16) is fixedly connected to the middle of the lower end of the pallet (12), and the output end of the main cylinder (16) is fixedly connected to the wedge (17).

6. A positioning device for automated welding of iron towers according to claim 1, characterized in that, Limiting arc holes (21) are formed on both sides of the limiting arc frame (20), and the two arc plates (23) are slidably connected to the limiting arc holes (21) by pins (22).

7. A positioning device for automated welding of iron towers according to claim 1, characterized in that, An anti-slip pad (30) is fixed to the end of the stop rod (29) away from the secondary cylinder (28).

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