Multi-degree-of-freedom floating clamp for longitudinal seam welding of tower drum

Abstract

The invention relates to the technical field of welding fixtures, and discloses a multi-degree-of-freedom floating fixture for longitudinal seam welding of a tower drum, which comprises a bearing part for placing the tower drum, one side of the bearing part is provided with a vertical frame, the vertical frame is connected with a clamping assembly through a moving assembly, the clamping assembly sleeves the end part of the tower drum, and the clamping assembly comprises a ring seat connected with the moving assembly; a plurality of sets of clamping pieces are installed on the ring base, the clamping pieces are located on the outer side of the clamping assembly, and an adjusting assembly for pushing the clamping pieces to move is installed on the ring base. By means of the multi-point clamping system capable of being independently adjusted, the clamping assembly is allowed to generate adaptive displacement along with deformation of the tower drum while the assembly precision is kept, and the assembly stress is effectively eliminated. Particularly, due to the matched design of the ring base and the moving assembly, the clamping system can achieve macroscopic position adjustment and can also conduct microcosmic deformation compensation.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a multi-degree-of-freedom floating fixture for longitudinal seam welding of towers. Background Technology

[0002] With the rapid growth of global demand for clean energy, the wind power industry has ushered in unprecedented development opportunities. As a key supporting structure for wind turbine generators, wind turbine towers are developing towards larger and ultra-higher sizes. The height of mainstream onshore wind turbine towers has generally exceeded 100 meters, and the diameter of the tapered section can reach more than 4 meters, while the size of offshore wind turbine towers is even larger. This trend poses extremely severe challenges to the manufacturing process of towers, especially its core component—the welding of the longitudinal seams of the tower sections.

[0003] Currently, specialized welding fixtures are commonly used for longitudinal seam welding of tower sections. The basic principle is to fix and press two curved steel plates (tiles) to be welded into a pre-set assembly position using an internal support and an external clamping mechanism. This ensures that key assembly dimensions such as weld gap and misalignment meet process requirements before welding. Traditional fixtures are mostly rigid designs with low degrees of freedom. During the rolling, transportation, and hoisting of tower steel plates, minor shape errors and rolling accuracy deviations are unavoidable. Rigid fixtures, when clamped, forcefully correct these deviations, resulting in significant assembly stress within the steel plates. This stress not only affects weld quality but may also lead to safety hazards such as deformation or cracking of the tower during subsequent use. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-degree-of-freedom floating fixture for welding longitudinal seams of towers, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a multi-degree-of-freedom floating clamp for longitudinal seam welding of towers, comprising a support for placing the tower, a support frame installed on one side of the support, the support frame being connected to a clamping assembly via a moving component, the clamping assembly being sleeved on the end of the tower, the clamping assembly including a ring seat connected to the moving component, multiple sets of clamping members installed on the ring seat, the clamping members being located on the outside of the clamping assembly, and an adjustment component for pushing the clamping members to move installed on the ring seat.

[0007] Furthermore, this application also proposes that the support section includes two parallel guide rails and a support frame that moves along the two guide rails; the support frame supports the tower.

[0008] Furthermore, this application also proposes that the support frame includes a base frame, a movable platform is mounted on the upper surface of the base frame, and two movable frames are mounted on the movable platform. Rollers are mounted on the two movable frames to support the tower. Two sets of rollers are mounted at the bottom of the base frame, and the roller sets move along guide rails.

[0009] Furthermore, this application also proposes that the ring seat has several waist-shaped holes, and the main body of the clamping component is a snap-fit ​​seat; the snap-fit ​​seat has a snap-fit ​​opening that is snapped onto the ring seat, and a pin that passes through the waist-shaped hole is installed on the snap-fit ​​seat. A spring is installed on the bottom surface of the snap-fit ​​opening, and the other end of the spring contacts the inner side of the ring seat; two sets of pressure rollers are installed on the snap-fit ​​seat.

[0010] Furthermore, this application also proposes that a toothed ring is fitted on the outer side of the ring seat, and retaining rings are installed on both sides of the toothed ring, with the two retaining rings located on both sides of the ring seat.

[0011] Furthermore, this application also proposes that multiple bosses are installed on the inner side of the retaining ring, and the bosses are spaced apart from the clamping member.

[0012] Furthermore, this application also proposes that the ring seat has multiple circular holes; the moving component includes a frame, on which multiple uprights are mounted, one end of each upright being fitted into a corresponding circular hole; a set of threaded seats are mounted on the frame, and threaded rods are fitted onto the threaded seats, with shaft seats fixed to the uprights at both ends of the threaded rods; one end of the threaded rod is connected to the drive component.

[0013] Furthermore, this application also proposes that the clamping wheel faces the center of the ring seat, and the outer surface of the clamping wheel is a conical surface.

[0014] Furthermore, this application also proposes that a power assembly is installed on one side of the clamping component, and the power assembly is connected to the frame via a connecting bracket.

[0015] Furthermore, this application also proposes that the clamping assembly is provided in two sets, with the two sets of clamping assemblies respectively sleeved at both ends of the tower.

[0016] The present invention has the following beneficial effects:

[0017] This invention utilizes an independently adjustable multi-point clamping system to maintain assembly accuracy while allowing the clamping components to adapt to tower deformation, effectively eliminating assembly stress. In particular, the design of the ring seat and the moving component enables the clamping system to achieve both macroscopic position adjustment and microscopic deformation compensation.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the present invention;

[0029] The attached diagram lists the components represented by each number as follows:

[0030] In the diagram: 1. Guide rail; 2. Support frame; 201. Base frame; 202. Moving platform; 203. Moving frame; 204. Roller assembly; 3. Upright frame; 4. Moving component; 401. Shaft seat; 402. Threaded rod; 403. Frame; 404. Drive component; 405. Upright pole; 406. Threaded seat; 5. Clamping component; 501. Ring seat; 5011. Waist-shaped hole; 5012. Round hole; 502. Clamping part; 5021. Snap-fit ​​seat; 5022. Pressure wheel; 5023. Pin shaft; 5024. Spring; 503. Gear ring; 504. Retaining ring; 505. Boss; 6. Tower; 7. Power component. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In existing technologies, rigid welding fixtures are commonly used in the manufacturing process of wind turbine towers. These fixtures fix the steel plates by forced alignment, leading to stress accumulation during assembly. As the tower size increases, the minute deformation errors generated during the rolling and transportation of the steel plates gradually become apparent. Traditional fixtures are unable to adapt to such deformations, causing stress concentration in the weld area and affecting the stability of weld quality. For example, when welding the longitudinal seam of a tower with a diameter exceeding four meters, the rigid clamping mechanism is prone to causing local deformation, resulting in weld misalignment exceeding the allowable range of the process.

[0033] To address these issues, the R&D team discovered a discrepancy between the rigid constraints of traditional clamps and the actual deformation of the tower. Analysis of the tower rolling process data revealed that the curvature error of the steel plate was generally within the millimeter range. Based on this, the research focus shifted to constructing a self-adaptive clamping mechanism. Considering the relatively small deformation amplitude at the tower end, the design approach was to install a floating, adjustable clamping device at the end, compensating for the steel plate deformation error through a multi-point independent adjustment mechanism.

[0034] Please see Figures 1-9 As shown, this invention is a multi-degree-of-freedom floating clamp for longitudinal seam welding of tower sections. It includes a support portion for placing the tower section 6, with a support frame 3 mounted on one side. The support frame 3 is connected to a clamping assembly 5 via a moving component 4. The clamping assembly 5 is sleeved on the end of the tower section 6. The clamping assembly 5 includes a ring seat 501 connected to the moving component 4. Multiple sets of clamping members 502 are mounted on the ring seat 501, located on the outer side of the clamping assembly 5. An adjustment component for pushing the clamping members 502 to move is mounted on the ring seat 501.

[0035] The moving component 4 refers to the transmission mechanism connecting the support frame 3 and the clamping component 5. Specifically, it can be implemented using a combination of guide rails and lead screws, used to adjust the position of the clamping component 5 relative to the axis of the tower 6. The ring seat refers to the annular support structure fitted onto the end of the tower 6. Specifically, it can be implemented using a split flange structure, providing an mounting surface for the clamping components. The clamping component refers to the pressing unit that contacts the surface of the tower. Specifically, it can be implemented using a roller mechanism with elastic elements, with the pressing force changed by adjusting the component. The adjusting component refers to the actuator that drives the movement of the clamping components, used to independently control the displacement of each clamping component.

[0036] Specifically, after the support unit supports the tower 6, the moving component 4 drives the clamping component 5 to move along the frame to a predetermined position. The ring seat is axially positioned by the moving component 4, and multiple sets of clamping members are radially distributed along the ring seat. When the tower 6 has local deformation, the adjusting component drives the corresponding clamping members to perform radial displacement compensation, so that each clamping member maintains uniform contact pressure with the tower surface. This multi-point independent adjustment mechanism allows the clamping components to make fine adjustments in three degrees of freedom, including axial translation, radial extension and contraction, and angular deflection, thereby adapting to tower surfaces with different curvature errors.

[0037] Compared to existing technologies, traditional welding fixtures use a rigid, integral pressure plate, which can only be fixed by forced correction when the tower deforms, easily leading to plastic deformation. This solution, however, uses an independently adjustable multi-point clamping system that allows the clamping components to adapt to the tower's deformation while maintaining assembly accuracy, effectively eliminating assembly stress. In particular, the design of the ring seat and the moving component allows the clamping system to achieve both macroscopic position adjustment and microscopic deformation compensation.

[0038] The support section includes two parallel guide rails 1 and a support frame 2 that moves along the two guide rails 1. The support frame 2 supports the tower 6.

[0039] Guide rail 1 refers to the linear track structure used to support and guide the movement of support frame 2. It can be implemented using I-beams or H-beams, and its parallel arrangement provides a stable movement path for support frame 2. Support frame 2 refers to the support device used to bear the weight of the tower. It can be implemented using a steel frame structure with roller sets. Longitudinal position adjustment is achieved through the cooperation of roller sets 204 and guide rail 1. The roller sets refer to the moving mechanism installed at the bottom of support frame 2. They can be implemented using steel rollers with bearings, reducing resistance during the movement of support frame 2 through rolling friction.

[0040] The support frame 2 includes a base frame 201. A movable platform 202 and two movable frames 203 that are installed on the upper surface of the base frame 201 are mounted on the movable platform 202. Rollers are installed on the two movable frames 203 to support the tower 6. Two sets of roller sets 204 are installed at the bottom of the base frame 201. The roller sets 204 move along the guide rail 1.

[0041] The base frame 201 refers to the basic frame supporting the movable platform 202 and the movable frame 203. It can be implemented using a welded steel structure to provide overall support stability. The movable platform 202 is an adjustable platform set on the upper surface of the base frame 201. It can be a steel plate structure with sliding rails, used to adjust the lateral position of the movable frame 203. The movable frame 203 is a movable support installed on the movable platform 202, whose rollers contact the outer wall of the tower 6 to form rolling support. The roller assembly 204 refers to the traveling mechanism installed at the bottom of the base frame. It can be nylon rollers with bearings, which achieve the overall movement of the support frame 2 by rolling along the guide rail 1.

[0042] The roller assembly 204 moves along the guide rail 1. A geared motor driving the roller assembly 204 is mounted on the base frame 201. A power-off brake is installed on the motor, with the brake disc connected to the motor shaft. When the motor is powered on, the brake is released simultaneously; when the motor is powered off, the brake immediately engages the brake disc through spring force, causing the motor shaft to stop rotating quickly and reliably, preventing the equipment from sliding due to inertia or slope.

[0043] The ring seat 501 has several oblong holes 5011. The main body of the clamping member 502 is a snap-fit ​​seat 5021. The snap-fit ​​seat 5021 is snapped onto the ring seat 501. A pin 5023 passing through the oblong holes 5011 is installed on the snap-fit ​​seat 5021. A spring 5024 is installed on the bottom surface of the snap-fit ​​seat. The other end of the spring 5024 contacts the inner side of the ring seat 501. Two sets of pressure rollers 5022 are installed on the snap-fit ​​seat 5021.

[0044] The oblong hole 5011 refers to a strip-shaped through hole extending radially along the ring seat 501. It can be machined into the surface of the ring seat to provide radial sliding space for the pin 5023. The pin 5023 is a cylindrical connector passing through the oblong hole 5011 and connecting the bayonet to the ring seat 501. It can be implemented using a threaded fastener. The radial clamping position of the clamping component is changed by adjusting the position of the pin 5023 within the oblong hole 5011. The spring 5024 is an elastic element located between the bottom surface of the bayonet and the inner surface of the ring seat 501. It can be implemented using a helical spring or a disc spring, and its elastic deformation buffers the impact load generated when the clamping wheel contacts the tower. The clamping wheel 5022 is a rotating component mounted on the clamping seat 5021, and can be a steel wheel with rolling bearings.

[0045] A toothed ring 503 is fitted on the outer side of the ring seat 501. A retaining ring 504 is installed on both sides of the toothed ring 503, and the two retaining rings 504 are located on both sides of the ring seat 501.

[0046] The toothed ring 503 refers to a toothed annular structure surrounding the outer circumference of the ring seat 501. Specifically, it can be a split steel toothed ring connected by bolts, used to mesh with the external power component 7 to transmit rotational adjustment power. The retaining ring 504 refers to annular limiting components fixed to both sides of the toothed ring 503, specifically annular steel plates that can be welded or bolted. The retaining rings 504 on both sides of the ring seat are located on the left and right end faces of the toothed ring, respectively, and are connected to the toothed ring 503 by bolts.

[0047] Multiple bosses 505 are installed on the inner side of the retaining ring 504, and the bosses 505 and the clamping member 502 are distributed at intervals.

[0048] The boss 505 can be implemented by welding or bolting metal strips and fixed on the retaining ring 504. The boss 505 has multiple stepped surfaces connected in sequence. The height of each stepped surface is H on the side of the stepped surface facing the clamping member 502.

[0049] In the clamping assembly 5, several ring-shaped clamping members 502 form a cavity with an inner diameter of D. At this time, the installed spring 5024 is at its maximum elongation. When there are five stepped surfaces on the boss 505, the adjustment range of the boss 505 is from 0 to 5H. Then the outer diameter range of the tower 6 that the clamping assembly 5 is suitable for clamping is from D to D+5H.

[0050] The outer diameter of tower 6 is preferably in the range of D+H to D+3H.

[0051] During the clamping process, the tower 6 needs to be placed on two support brackets 2. The movement of the two support brackets 2 pushes one end of the tower 6 to move towards the clamping assembly 5. The port of the tower 6 pushes the conical surface of the pressure wheel 5022 to compress the spring 5024, thereby moving the snap-fit ​​seat 5021 outward. Then, the clamping component 502 clamps the outside of the tower 6.

[0052] During adjustment, the gear ring 503 is driven to rotate by the power component 7. Since the ring seat 501 is connected to the upright 405, the installed ring seat 501 does not rotate.

[0053] The power assembly 7 is fixed to the frame 403. The power assembly 7 includes a motor and a reducer. The pinion of the reducer meshes with the gear ring 503, driving the gear ring 503 to rotate slowly.

[0054] The rotation of the toothed ring 503 drives the retaining ring 504 and the boss 505 to rotate. During the rotation of the boss 505, the stepped surface of the boss 505 pushes the clamping member 502 to move towards the center of the ring seat 501, thereby limiting the movement range of the clamping member 502.

[0055] When the tower cylinder 6, with a diameter greater than D, is pushed in, its port presses against the tapered surface of the clamping wheel 5022. This inclined surface converts the axial thrust into a radially outward component, overcoming the spring force and pushing the entire clamping seat 5021 outward. All clamping elements 502 move outward synchronously, thus adaptively "wrapping" the tower cylinder to achieve clamping; the operator drives the gear ring 503 to rotate via the power unit 7, thereby causing the boss 505 to rotate. When the boss rotates to a certain step surface facing the center, this step surface forms a mechanical stop point.

[0056] By selecting different step surfaces, the operator can precisely set the shrinkage limit of the clamping components, which also facilitates the adjustment of the structure of the internal clamps of the tower 6.

[0057] The ring seat 501 has multiple round holes 5012. The moving component 4 includes a frame 403. Multiple uprights 405 are installed on the frame 403. One end of the upright 405 is fitted into the corresponding round hole 5012. A set of threaded seats 406 is installed on the frame 403. Threaded rods 402 are fitted on the threaded seats 406. Both ends of the threaded rods 402 are fitted with shaft seats 401 fixed on the upright 3. One end of the threaded rods 402 is connected to the drive component 404.

[0058] The frame 403 refers to the basic support structure that carries the clamping assembly. It can be implemented using a welded metal frame, with its internal space accommodating the adjustment mechanism. The upright is a positioning component vertically mounted on the surface of the frame 403. It can be implemented using a cylindrical metal rod and achieves axial positioning by inserting it into the circular hole of the ring seat. The threaded seat 406 is a fixed base with internal threads. It can be machined from a high-strength alloy material and is used to form a helical drive pair with the threaded rod 402. The threaded rod 402 is a rotating shaft with external threads. It can be implemented using a surface-hardened steel rod and drives the frame 403 to move axially through rotational motion. The shaft seat 401 is a fixed component that supports the rotating shaft. It can be implemented using a mounting seat with rolling bearings to ensure the stability of the threaded rod 402 during rotation. The drive assembly 404 is an actuator that provides rotational power. It can be implemented using a servo motor or a manual crank and controls the rotation angle of the threaded rod 402 by outputting torque.

[0059] The power assembly 7 is fixed to the frame 403;

[0060] Specifically, when it is necessary to adjust the relative position between the clamping assembly and the end of the tower 6, the drive assembly rotates the threaded rod around its own axis. Since the threaded rod and the threaded seat form a helical pair, the rotational motion is converted into a linear displacement of the frame 403 along the axial direction. During the movement of the frame 403, the upright slides within the circular hole of the ring seat, ensuring the linear accuracy of the movement trajectory. By adjusting the rotation angle of the threaded rod, the axial floating range of the clamping assembly can be precisely controlled. This structure allows the clamping assembly to adaptively displace according to the deformation of the tower during welding, avoiding stress concentration during assembly caused by rigid constraints.

[0061] The position of the clamping component 5 can be adjusted by moving component 4, thereby increasing the degree of freedom of movement of the clamping component 5.

[0062] The clamping wheel 5022 faces the center of the ring seat 501, and the outer surface of the clamping wheel 5022 is a tapered surface.

[0063] A power assembly 7 is installed on one side of the clamping member 502, and the power assembly 7 is connected to the frame 403 through a connecting bracket.

[0064] The power assembly 7 refers to the drive device that provides active adjustment force for the clamping component. Specifically, it can be implemented by a drive motor and a reduction gear set, and its output end is connected to the gear ring 503 through a gear. The connecting frame refers to the rigid support structure fixed to the frame. Specifically, it can be a welded frame or a bolted steel component. Its function is to keep the installation position of the power assembly synchronized with the movement trajectory of the frame.

[0065] The clamping assembly 5 is provided in two sets, and the two sets of clamping assemblies 5 are respectively sleeved on both ends of the tower 6.

[0066] Clamping assembly 5 refers to the mechanical structure used to fix the end of the tower cylinder. Specifically, it can be implemented using a ring frame with clamping wheels and adjusting components. Multiple clamping units apply uniform pressure to the outer wall of the tower cylinder 6. The two sets of nested clamping components refer to two independent clamping assemblies acting on both ends of the tower cylinder 6 respectively. They achieve coordinated clamping through a synchronous adjusting mechanism, thereby balancing the axial force and eliminating the deformation error of the cylinder.

[0067] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-degree-of-freedom floating fixture for longitudinal seam welding of towers, comprising a support for placing the tower (6), characterized in that: A support frame (3) is installed on one side of the support portion. The support frame (3) is connected to the clamping assembly (5) via a moving component (4). The clamping assembly (5) is sleeved on the end of the tower (6). The clamping assembly (5) includes a ring seat (501) connected to the moving assembly (4); Multiple sets of clamping members (502) are installed on the ring seat (501), and the clamping members (502) are located outside the clamping assembly (5). An adjustment assembly for pushing the clamping members (502) to move is installed on the ring seat (501).

2. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 1, characterized in that: The support includes two parallel guide rails (1) and a support frame (2) that moves along the two guide rails (1); the support frame (2) supports the tower (6).

3. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 2, characterized in that: The support frame (2) includes a base frame (201), on the upper surface of the base frame (201) is a movable platform (202) and two movable frames (203) that are fitted on the movable platform (202). Rollers are installed on the two movable frames (203) to support the tower (6). Two sets of rollers (204) are installed at the bottom of the base frame (201), and the rollers (204) move along the guide rail (1).

4. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 1, characterized in that: The ring seat (501) has several waist-shaped holes (5011), and the main body of the clamping member (502) is a snap-fit ​​seat (5021); the snap-fit ​​seat (5021) is snapped onto the ring seat (501), and a pin (5023) passing through the waist-shaped hole (5011) is installed on the snap-fit ​​seat (5021). A spring (5024) is installed on the bottom surface of the snap-fit ​​seat, and the other end of the spring (5024) contacts the inner side of the ring seat (501); two sets of pressure rollers (5022) are installed on the snap-fit ​​seat (5021).

5. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 4, characterized in that: A toothed ring (503) is fitted on the outer side of the ring seat (501), and a retaining ring (504) is installed on both sides of the toothed ring (503), with the two retaining rings (504) located on both sides of the ring seat (501).

6. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 5, characterized in that: The inner side of the retaining ring (504) is provided with a plurality of bosses (505), which are spaced apart from the clamping member (502).

7. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 6, characterized in that: The ring seat (501) has multiple round holes (5012); the moving component (4) includes a frame (403), on which multiple uprights (405) are installed, and one end of the uprights (405) is fitted into the corresponding round hole (5012); a set of threaded seats (406) is installed on the frame (403), and a threaded rod (402) is fitted on the threaded seat (406), and both ends of the threaded rod (402) are fitted with shaft seats (401) fixed on the upright (3); one end of the threaded rod (402) is connected to the driving component (404).

8. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 4, characterized in that: The clamping wheel (5022) faces the center of the ring seat (501), and the outer surface of the clamping wheel (5022) is a tapered surface.

9. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 1, characterized in that: A power assembly (7) is installed on one side of the clamping member (502), and the power assembly (7) is connected to the frame (403) through a connecting frame.

10. The multi-degree-of-freedom floating fixture for longitudinal seam welding of towers according to claim 1, characterized in that: The clamping assembly (5) is provided in two sets, and the two sets of clamping assemblies (5) are respectively sleeved on both ends of the tower (6).

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