Wind turbine generator cabin longitudinal beam welding tool

Abstract

The invention belongs to the technical field of welding, particularly relates to a wind turbine generator cabin longitudinal beam welding-on tool, and aims to solve the problems that an existing welding-on tool is single in longitudinal beam fixing and supporting mode and poor in fixing effect, a longitudinal beam can expand and deform in the welding-on process and does not have compensation and reset effects, and the welding-on effect is affected. Four supporting legs are mounted at the bottom of the working plate, and two welding supporting plates are symmetrically mounted at the top of the working plate in a sliding manner; the two movable clamping mechanisms are mounted at the tops of the two welding supporting plates in a sliding manner; and the two moving control mechanisms are mounted at the tops of the two welding supporting plates and connected with the two moving clamping mechanisms. The longitudinal beam fixing effect is improved through the electromagnet and mechanical clamping composite design, stress is absorbed through hydraulic energy storage during welding thermal deformation through the buffer hydraulic cylinder and the eccentric wheel linkage design, automatic reset is achieved after cooling, material deformation is effectively compensated, and welding defects are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and particularly relates to a welding tooling for the longitudinal beam of a wind turbine nacelle. Background Art

[0002] A wind power generation unit is a system that converts the kinetic energy of wind into electrical energy. The wind power generation power supply consists of a wind turbine generator set, a tower for supporting the generator set, a battery charging controller, an inverter, a load discharger, a grid connection controller, a battery pack, etc. Most components of the wind turbine generator set are installed in the nacelle at the top of the tower. The nacelle is an important component of the wind turbine generator set and is the protective structure of the wind turbine generator set. The longitudinal beam is an essential component in the nacelle. Generally, the longitudinal beam needs to be welded and processed. In the traditional processing method, a fixture (such as a bench vice) is used to fix the main beam of the longitudinal beam, then lines are drawn on the main beam of the longitudinal beam, and then the support beam is aligned with the main beam, and welding is carried out by hand. In this way, the welding of each component is completed. This method is prone to errors after welding and has low processing efficiency.

[0003] Chinese Patent Document: CN219358429U, discloses a welding tooling for the longitudinal beam of a wind turbine nacelle, including a longitudinal rectangular tube and two pairs of transverse rectangular tubes. The two pairs of transverse rectangular tubes are respectively arranged on the front and rear side walls at both ends of the longitudinal rectangular tube. The longitudinal rectangular tube is provided with a support assembly and a positioning assembly for supporting the main beam of the longitudinal beam, and the transverse rectangular tube is provided with a fixing assembly for fixing the support beam of the longitudinal beam. And one end of the longitudinal rectangular tube is provided with a limiting assembly for limiting the end cover plate of the main beam of the longitudinal beam. This makes the positioning of each component accurate during the welding of the wind turbine nacelle longitudinal beam, and the welding efficiency and quality are high.

[0004] The existing welding tooling has a single way of fixing and supporting the longitudinal beam, with poor fixing effect. During welding, the longitudinal beam will have expansion deformation and does not have a compensation and reset effect, which affects the welding effect. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages that the existing welding tooling has a single way of fixing and supporting the longitudinal beam, with poor fixing effect, the longitudinal beam will have expansion deformation during welding, and it does not have a compensation and reset effect, which affects the welding effect, and to propose a welding tooling for the longitudinal beam of a wind turbine nacelle.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A welding tooling for the longitudinal beam of a wind turbine nacelle, comprising:

[0008] A working plate, four support legs are installed at the bottom of the working plate, and two welding support plates are symmetrically and slidably installed on the top of the working plate;

[0009] Two moving clamping mechanisms are slidably installed on the tops of the two welding support plates;

[0010] Two moving control mechanisms are installed on the tops of two welding support plates and are connected to two moving clamping mechanisms;

[0011] Two flipping clamping mechanisms are installed on the tops of two welding support plates and cooperate with two moving clamping mechanisms to fix the longitudinal beam;

[0012] Two sets of conductive mechanisms are arranged on the tops of two. There are three extrusion blocks on each of the two flipping clamping mechanisms, and the six extrusion blocks are adapted to the two sets of conductive mechanisms.

[0013] Preferably, four sliding grooves are formed in the top of the working plate. The four sliding grooves are symmetrically arranged in pairs. Two sliding blocks are fixedly installed at the bottoms of the two welding support plates. The sliding blocks are slidably connected to the inner walls of the corresponding sliding grooves. A limiting rod is fixedly installed in the sliding groove. A limiting hole is formed in the sliding block. The two limiting rods are slidably connected to the inner walls of the corresponding limiting holes. Through the cooperation of the limiting rod and the limiting hole, it is ensured that the sliding block slides in the sliding groove, so that the welding support plate slides on the top of the working plate, realizing the symmetrical sliding of the welding support plate and adapting to the positioning requirements of longitudinal beams of different sizes.

[0014] Preferably, two bottom grooves are formed in the bottom of the welding support plate. Four linear motors are symmetrically and fixedly installed on the top of the working plate. The four linear motors are located in the four bottom grooves. The linear motors are fixedly installed on the inner walls of the corresponding bottom grooves. The two welding support plates are pushed closer to each other by the four linear motors. The two welding support plates drive the two longitudinal beams to approach each other, and the two longitudinal beams can be welded when they approach.

[0015] Preferably, the moving clamping mechanism includes a moving clamping plate. The moving clamping plate is slidably installed on the top of the working plate. Clamping strip units are fixedly installed on the inner sides of the two moving clamping plates. The clamping strip unit includes a clamping box. A plurality of groups of electromagnets are arranged in the clamping box. The plurality of groups of electromagnets are connected in series. A box cover is fixedly installed on the outer side of the clamping box.

[0016] Preferably, the moving control mechanism includes a vertical plate and a pushing plate. The vertical plate is fixedly installed on the top of the working plate. Two sliding rods are slidably installed on the vertical plate. The two sliding rods are both fixedly installed with the moving clamping plate. Limit pieces are fixedly installed at the outer ends of the two sliding rods. Return springs are sleeved on the outer sides of the two sliding rods. One end of the return spring is fixedly installed on the outer side of the vertical plate, and the other end of the return spring is fixedly installed with the limit piece.

[0017] Preferably, a support pad is fixedly installed on the top of the pushing plate, a dual-axis motor is fixedly installed on the top of the support pad, rotating shafts are fixedly installed on both output shafts of the dual-axis motor, eccentric wheels are fixedly installed on the outer ends of the two rotating shafts, both eccentric wheels are in contact with the movable clamping plate, two bearing seats are fixedly installed on the top of the support pad, and the two bearing seats are used to support the two rotating shafts. A displacement sensor is arranged on the top of the pushing plate. When the dual-axis motor works, it drives the two rotating shafts to rotate. The two rotating shafts drive the two eccentric wheels to rotate. The two eccentric wheels squeeze the movable clamping plate to move. The movable clamping plate drives the three clamping strip units to move. The three clamping strip units cooperate with the three flipping rods to press and fix the longitudinal beam. The electromagnet is energized to generate magnetism, and the magnetism is transmitted to the box cover through multiple groups of electromagnets, and then the longitudinal beam is attracted and fixed.

[0018] Preferably, two balls are embedded in the bottom of the pushing plate, two ball grooves are formed in the top of the working plate, and the two balls are slidably connected with the inner walls of the two ball grooves; the cooperation of the balls and the ball grooves reduces the friction of the pushing plate moving on the working plate.

[0019] Preferably, two buffer hydraulic cylinders are embedded in the vertical plate, the output shafts of the two buffer hydraulic cylinders are fixedly installed with the two pushing plates, and the buffer hydraulic cylinders are designed to be linked with the eccentric wheels. When there is thermal deformation during welding, the stress is absorbed by hydraulic energy storage, and it automatically resets after cooling, effectively compensating for material deformation and reducing welding defects.

[0020] Preferably, the flipping clamping mechanism includes two support blocks, both support blocks are fixedly installed on the top of the working plate, rotating shafts are rotatably installed on both support blocks, the same flipping connection bar is fixedly installed between the two rotating shafts, synchronous motors are fixedly installed on the outer sides of the two support blocks, a flipping rod is fixedly installed on the top of the flipping connection bar, rubber strips are arranged on the inner sides of the flipping rods, and an arc surface is arranged at the bottom of the flipping connection bar. Three extrusion blocks are fixedly installed at the bottom of the flipping connection bar.

[0021] Preferably, the conducting mechanism includes three insulating cylinders, three accommodating grooves are formed in the top of the welding support plate, the three insulating cylinders are installed on the inner walls of the bottoms of the three accommodating grooves, first conducting blocks are fixedly installed in the three insulating cylinders, insulating pads are slidably installed in the three insulating cylinders, insulating rods are fixedly installed at the bottoms of the three insulating pads, second conducting blocks are fixedly installed at the bottoms of the three insulating rods, return springs are sleeved on the outer sides of the three insulating rods, the bottom ends of the return springs are fixedly installed with the inner walls of the insulating cylinders, the top ends of the return springs are fixedly installed with the bottom ends of the insulating pads, and the first conducting blocks, the second conducting blocks, and the electromagnets form a circuit.

[0022] In the present invention, the beneficial effects of the wind turbine nacelle longitudinal beam welding tooling are as follows:

[0023] First, through the cooperation of the chute and the slider, the symmetrical sliding of the welding support plate is realized, which can adapt to the positioning requirements of longitudinal beams of different sizes. The linear motor drives the movement of the support plate, with high precision and programmable control, improving the automation level of welding docking.

[0024] Second, the flipping and clamping mechanism uses a synchronous motor to drive the flipping rod to achieve a 90° flipping and positioning of the longitudinal beam, simplifying manual operation. The flipping connecting bar drives three extrusion blocks to flip and enter the corresponding three receiving grooves. The extrusion blocks extrude the corresponding insulating pads, and the insulating pads push the insulating rods to move downward. The insulating rods push the second conductive block to move downward and contact the first conductive block, making the electromagnet energized;

[0025] Third, the buffer hydraulic cylinder and the eccentric wheel are designed to be linked. When there is thermal deformation during welding, stress is absorbed through hydraulic energy storage, and it automatically resets after cooling, effectively compensating for material deformation and reducing welding defects. The displacement sensor monitors the position of the pushing plate in real time to ensure closed-loop control of the clamping force and displacement.

[0026] Fourth, the composite design of the electromagnet and mechanical clamping: After the electromagnet is energized, a uniform magnetic suction force is formed through the box cover. Combined with the flexible contact of the rubber strip, damage to the surface of the longitudinal beam is avoided. The coordinated action of the eccentric wheel and the return spring provides a stable clamping force and allows elastic release to prevent overload damage.

[0027] In the present invention, the composite design of the electromagnet and mechanical clamping improves the fixing effect of the longitudinal beam. The buffer hydraulic cylinder and the eccentric wheel are designed to be linked. When there is thermal deformation during welding, stress is absorbed through hydraulic energy storage, and it automatically resets after cooling, effectively compensating for material deformation and reducing welding defects. Through the three core technologies of electromagnetic-mechanical composite clamping, multi-level dynamic compensation, and high-precision coordinated control, the three major pain points existing in traditional welding tooling, namely low positioning accuracy, uncontrollable thermal deformation, and high surface damage rate, are solved. Brief Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a welding tooling for the longitudinal beam of the nacelle of a wind turbine proposed by the present invention;

[0029] Figure 2 It is a schematic side view structural diagram of a welding tooling for the longitudinal beam of the nacelle of a wind turbine proposed by the present invention;

[0030] Figure 3 It is a schematic bottom view structural diagram of a welding tooling for the longitudinal beam of the nacelle of a wind turbine proposed by the present invention;

[0031] Figure 4 It is a schematic structural diagram of the working plate and its related parts proposed by the present invention;

[0032] Figure 5 It is a schematic structural diagram of the welding support plate, the movement control mechanism, and the flipping and clamping mechanism proposed by the present invention;

[0033] Figure 6 The upward view structure diagram proposed by the present invention Figure 5 ;

[0034] Figure 7 The structure diagram of the welding support plate, moving clamping mechanism, moving control mechanism and their related parts proposed by the present invention

[0035] Figure 8 The upward view structure diagram proposed by the present invention Figure 7 ;

[0036] Figure 9 The structure diagram of the push plate, support pad, double-shaft motor, rotating shaft, eccentric wheel and their related parts proposed by the present invention

[0037] Figure 10 The side view structure diagram proposed by the present invention Figure 9 ;

[0038] Figure 11 The upward view structure diagram proposed by the present invention Figure 9 ;

[0039] Figure 12 The structure diagram of the conductive mechanism proposed by the present invention

[0040] Figure 13 The upward view structure diagram proposed by the present invention Figure 12 ;

[0041] Figure 14 The structure diagram of the clamping bar unit proposed by the present invention

[0042] Figure 15 The structure diagram of the clamping box, electromagnet and box cover proposed by the present invention

[0043] In the figure: 1. Working plate; 11. Support leg; 12. Slide groove; 13. Limit rod; 2. Welding support plate; 21. Slide block; 211. Limit hole; 22. Bottom opening groove; 23. Linear motor; 24. Accommodating groove; 3. Moving clamping mechanism; 31. Moving clamping plate; 32. Clamping strip unit; 321. Clamping box; 322. Box cover; 323. Electromagnet; 4. Moving control mechanism; 41. Vertical plate; 42. Buffer hydraulic cylinder; 43. Slide rod; 44. Spring; 45. Limit piece; 46. Ball groove; 47. Pushing plate; 471. Ball; 48. Support pad; 49. Biaxial motor; 410. Bearing seat; 411. Rotating shaft; 412. Eccentric wheel; 413. Displacement sensor; 5. Flipping clamping mechanism; 51. Flipping connecting strip; 52. Flipping rod; 53. Rubber strip; 54. Support block; 55. Synchronous motor; 56. Flipping shaft; 57. Arc surface; 6. Extrusion block; 7. Conductive mechanism; 71. Insulating cylinder; 72. First conductive block; 73. Return spring; 74. Insulating rod; 75. Second conductive block; 76. Insulating pad. Specific embodiments

[0044] Next, the technical solutions in this embodiment will be clearly and completely described in conjunction with the accompanying drawings in this embodiment. Obviously, the described embodiments are only a part of the embodiments of this embodiment, rather than all the embodiments.

[0045] Embodiment 1

[0046] Referring to Figures 1 - 15 , a welding tooling for the longitudinal beam of the nacelle of a wind turbine, includes a working plate 1, two moving clamping mechanisms 3, two moving control mechanisms 4, two flipping clamping mechanisms 5 and two groups of conductive mechanisms 7. Four support legs 11 are installed at the bottom of the working plate 1. Two welding support plates 2 are symmetrically and slidably installed on the top of the working plate 1. Two moving clamping mechanisms 3 are slidably installed on the top of the two welding support plates 2. Two moving control mechanisms 4 are installed on the top of the two welding support plates 2 and are connected to the two moving clamping mechanisms 3. Two flipping clamping mechanisms 5 are installed on the top of the two welding support plates 2 and cooperate with the two moving clamping mechanisms 3 to fix the longitudinal beam. Two groups of conductive mechanisms 7 are arranged on the top of the two 2. Three extrusion blocks 6 are arranged on each of the two flipping clamping mechanisms 5. The six extrusion blocks 6 are adapted to the two groups of conductive mechanisms 7.

[0047] Referring to Figure 4 , Figure 6, in this embodiment, four sliding grooves 12 are formed at the top of the working plate 1, and the four sliding grooves 12 are symmetrically arranged in pairs. Two sliding blocks 21 are fixedly installed at the bottom of each of the two welding support plates 2. The sliding blocks 21 are slidably connected to the inner walls of the corresponding sliding grooves 12. A limiting rod 13 is fixedly installed in the sliding groove 12. A limiting hole 211 is formed in the sliding block 21. The two limiting rods 13 are slidably connected to the inner walls of the corresponding limiting holes 211. Two bottom grooves 22 are formed at the bottom of the welding support plate 2. Four linear motors 23 are symmetrically and fixedly installed at the top of the working plate 1. The four linear motors 23 are located in the four bottom grooves 22, and the linear motors 23 are fixedly installed on the inner walls of the corresponding bottom grooves 22.

[0048] Specifically, through the cooperation of the limiting rod 13 and the limiting hole 211, it is ensured that the sliding block 21 slides in the sliding groove 12, so that the welding support plate 2 slides on the top of the working plate 1, realizing the symmetrical sliding of the welding support plate 2 and adapting to the positioning requirements of longitudinal beams of different sizes.

[0049] More specifically, the linear motors drive the two welding support plates 2 to approach synchronously, realizing the parallel welding of double longitudinal beams. The efficiency is increased by 30%-50% compared with the traditional single-piece welding. The repeat positioning accuracy can reach ±0.1 mm, and the weld pass rate is increased from 85% to 98%.

[0050] Refer to Figure 5 、 Figure 7 、 Figure 14 、 Figure 15 , in this embodiment, the moving clamping mechanism 3 includes a moving clamping plate 31. The moving clamping plate 31 is slidably installed on the top of the working plate 1. Clamping strip units 32 are fixedly installed on the inner sides of the two moving clamping plates 31. The clamping strip unit 32 includes a clamping box 321. A plurality of groups of electromagnets 323 are arranged in the clamping box 321. The plurality of groups of electromagnets 323 are connected in series. A box cover 322 is fixedly installed on the outer side of the clamping box 321.

[0051] Specifically, the electromagnet 323 is combined with mechanical clamping design: after the electromagnet is energized, a uniform magnetic attraction force is formed through the box cover 322, combined with the flexible contact of the rubber strip 53, to avoid damage to the surface of the longitudinal beam.

[0052] More specifically, the series design of the electromagnet 323 and the clamping box 321 realizes the uniform distribution of the magnetic attraction force (magnetic field uniformity ≥ 95%), combined with the flexible contact of the rubber strip 53, to avoid indentation on the surface of the longitudinal beam.

[0053] Dynamic adjustment range of clamping force: 0.5 - 5 kN (controlled by the current of the electromagnet);

[0054] The surface damage rate is reduced to 0.5% (3.2% for traditional fixtures);

[0055] The qualified rate of weld seams has been increased from 85% to 98% (based on the statistics of 1000 welding tests).

[0056] Referring to Figure 7 、 Figures 9 - 11 In this embodiment, the mobile control mechanism 4 includes a vertical plate 41 and a push plate 47. The vertical plate 41 is fixedly installed on the top of the working plate 1. Two sliding rods 43 are slidably installed on the vertical plate 41. Both of the two sliding rods 43 are fixedly installed with a mobile clamping plate 31. Limit pieces 45 are fixedly installed at the outer ends of the two sliding rods 43. Return springs 44 are sleeved on the outer sides of the two sliding rods 43. One end of the return spring 44 is fixedly installed on the outer side of the vertical plate 41, and the other end of the return spring 44 is fixedly installed with the limit piece 45. A support pad 48 is fixedly installed on the top of the push plate 47. A double-shaft motor 49 is fixedly installed on the top of the support pad 48. Rotating shafts 411 are fixedly installed on the two output shafts of the double-shaft motor 49. Eccentric wheels 412 are fixedly installed at the outer ends of the two rotating shafts 411. Both of the two eccentric wheels 412 are in contact with the mobile clamping plate 31. Two bearing seats 410 are fixedly installed on the top of the support pad 48, and the two bearing seats 410 are used to support the two rotating shafts 411. A displacement sensor 413 is arranged on the top of the push plate 47.

[0057] Specifically, the displacement sensor 413 monitors the position of the push plate 47 in real time to ensure the closed-loop control of the clamping force and displacement. The double-shaft motor 49 works to drive the two rotating shafts 411 to rotate. The two rotating shafts 411 drive the two eccentric wheels 412 to rotate. The two eccentric wheels 412 squeeze the mobile clamping plate 31 to move. The mobile clamping plate 31 drives the three clamping bar units 32 to move. The three clamping bar units 32 cooperate with the three flipping rods 52 to press and fix the longitudinal beam. Reverse control the double-shaft motor 49 so that the protrusions of the two eccentric wheels 412 deviate from the mobile clamping plate 31. Through the elastic force of the two return springs 44, the sliding rods 43 pull the corresponding mobile clamping plate 31 to reset and move away from the longitudinal beam.

[0058] More specifically, the displacement sensor 413 monitors the position of the push plate 47 in real time and forms a PID closed-loop control with the double-shaft motor 49.

[0059] Clamping force control accuracy: ±1.5% (when the full scale is 5 kN);

[0060] Dynamic adjustment frequency response: 10 Hz (adapting to the thermal expansion rate of the longitudinal beam);

[0061] System stability: The drift is <0.01 mm during continuous operation for 72 hours.

[0062] Referring to Figure 7 、 Figure 11, in this embodiment, two balls 471 are embedded at the bottom of the pushing plate 47, two ball grooves 46 are formed at the top of the working plate 1, and the two balls 471 are slidably connected to the inner walls of the two ball grooves 46. Two buffer hydraulic cylinders 42 are embedded on the vertical plate 41, and the output shafts of the two buffer hydraulic cylinders 42 are fixedly installed with the two pushing plates 47.

[0063] Specifically, the balls 471 cooperate with the ball grooves 46 to reduce the friction of the pushing plate 47 moving on the working plate 1. The buffer hydraulic cylinders 42 and the eccentric wheels 412 are designed in a linkage manner. When there is welding thermal deformation, stress is absorbed through hydraulic energy storage and automatically reset after cooling, effectively compensating for material deformation and reducing welding defects.

[0064] More specifically, the return spring 44 provides a quick release force (initial elastic force of 200 N), and the buffer hydraulic cylinder 42 releases the stored energy to push for reset, avoiding mechanical shock.

[0065] Return time: 3 seconds (traditional pure spring return takes 8 seconds);

[0066] Return position deviation: ±0.08 mm (measured by a dial indicator);

[0067] Spring life: ≥10^6 cycles (fatigue test data).

[0068] Refer to Figure 5 、 Figure 7 、 Figure 12 、 Figure 13 , in this embodiment, the flipping and clamping mechanism 5 includes two support blocks 54, both of the two support blocks 54 are fixedly installed on the top of the working plate 1, a flipping shaft 56 is rotatably installed on each of the two support blocks 54, the same flipping connection bar 51 is fixedly installed between the two flipping shafts 56, a synchronous motor 55 is fixedly installed on the outer side of each of the two support blocks 54, a flipping rod 52 is fixedly installed on the top of the flipping connection bar 51, rubber strips 53 are arranged on the inner sides of the flipping rods 52, and an arc surface 57 is arranged at the bottom of the flipping connection bar 51. Three extrusion blocks 6 are fixedly installed at the bottom of the flipping connection bar 51.

[0069] Specifically, the synchronous motor 55 drives the flipping connection bar 51 to achieve a precise 90° flip of the longitudinal beam (angle error ≤ 0.2°), and the rubber strips 53 adaptively fit the curved surface.

[0070] Flipping time: 10 seconds (traditional hydraulic flipping takes 30 seconds);

[0071] Positioning repeatability: ±0.3 mm (verified by a laser tracker);

[0072] Motor torque redundancy design: 200% of the rated load (to prevent overload and jamming).

[0073] Reference Figure 5 , Figure 7 , Figure 12 , Figure 13 , in this embodiment, the conductive mechanism 7 includes three insulating cylinders 71. Three receiving grooves 24 are formed in the top of the welding support plate 2. The three insulating cylinders 71 are installed on the inner walls of the bottoms of the three receiving grooves 24. A first conductive block 72 is fixedly installed in each of the three insulating cylinders 71. An insulating pad 76 is slidably installed in each of the three insulating cylinders 71. An insulating rod 74 is fixedly installed at the bottom of each of the three insulating pads 76. A second conductive block 75 is fixedly installed at the bottom end of each of the three insulating rods 74. A return spring 73 is sleeved on the outer side of each of the three insulating rods 74. The bottom end of the return spring 73 is fixedly installed on the inner wall of the insulating cylinder 71. The top end of the return spring 73 is fixedly installed on the bottom end of the insulating pad 76. The first conductive block 72, the second conductive block 75, and the electromagnet 323 form a circuit.

[0074] Working mode: When in use, power on the power supply and the controller, place the longitudinal beam on the top of the flipping rod 52. The two synchronous motors 55 drive the flipping connection bar 51 to rotate. The flipping connection bar 51 drives the three flipping rods 52 to flip 90 degrees. The flipping connection bar 51 drives the three extrusion blocks 6 to flip and enter the corresponding three receiving grooves 24. The extrusion blocks 6 extrude the corresponding insulating pads 76. The insulating pads 76 push the insulating rods 74 to move downward. The insulating rods 74 push the second conductive block 75 to move downward and contact the first conductive block 72, enabling the electromagnet 323 to be powered on. The bottom of the flipping connection bar 51 pushes the longitudinal beam to the position between the clamping bar unit 32 and the flipping rod 52. The dual-axis motor 49 works to drive the two rotating shafts 411 to rotate. The two rotating shafts 411 drive the two eccentric wheels 412 to rotate. The two eccentric wheels 412 extrude the moving clamping plate 31 to move. The moving clamping plate 31 drives the three clamping bar units 32 to move. The three clamping bar units 32 cooperate with the three flipping rods 52 to clamp and fix the longitudinal beam tightly. The electromagnet 323 is powered on to generate magnetism. The magnetism is transmitted to the box cover 322 through multiple groups of electromagnets 323, and then the longitudinal beam is attracted and fixed. After clamping and fixing the two longitudinal beams, the four linear motors 23 are controlled to push the two welding support plates 2 closer to each other. The two welding support plates 2 drive the two longitudinal beams closer to each other. When the two longitudinal beams are close, welding processing can be carried out. When the staff welds the longitudinal beam, the longitudinal beam expands due to heat and deforms. The longitudinal beam extrudes the moving clamping mechanism 3 to move in the reverse direction and applies the acting force on the two eccentric wheels 412. Then the two eccentric wheels 412 transmit the force to the bearing seat 410, the support pad 48, and the push plate 47. The push plate 47 moves in the reverse direction and transmits the acting force to the two buffer hydraulic cylinders 42. The two buffer hydraulic cylinders 42 perform hydraulic energy storage. After the longitudinal beam cools down, the energy stored in the two buffer hydraulic cylinders 42 is released to push the push plate 47 to reset. The two eccentric wheels 412 continue to extrude the moving clamping plate 31. After welding is completed, the dual-axis motor 49 is controlled in the reverse direction so that the protrusions of the two eccentric wheels 412 deviate from the moving clamping plate 31. Under the elastic force of the two return springs 44, the sliding rod 43 pulls the corresponding moving clamping plate 31 to reset and move away from the longitudinal beam. The two synchronous motors 55 work in the reverse direction to drive the flipping connection bar 51 and the three flipping rods 52 to reset to the horizontal state. The extrusion blocks 6 leave the corresponding insulating pads 76. Under the elastic force of the return spring 73, the first conductive block 72 and the second conductive block 75 are separated. The electromagnet 323 is powered off and loses magnetism. Then the welded longitudinal beam can be removed.

[0075] Embodiment 2

[0076] Example 2 is the same as the rest of Example 1, except that: the four support legs 11 are replaced by four or eight groups of hydraulic telescopic cylinders. The use height of the working plate 1 can be adjusted through the hydraulic telescopic cylinders. On the one hand, it can meet the welding and processing requirements of workers with different heights, and on the other hand, it can reduce the height of the working plate 1 to facilitate the loading and unloading of the longitudinal beam. All the structural shapes, dimensions and materials of Example 1 are included in this application and can be selected and adjusted to meet specific usage conditions. The attached drawings are all schematic structural diagrams, and appropriate adjustments can be made to the specific actual dimensions.

[0077] As mentioned above, the above is only the preferred specific implementation manner of this embodiment, but the protection scope of this embodiment is not limited thereto. Any person skilled in the art within the technical scope disclosed in this embodiment, according to the technical solution and inventive concept of this embodiment, makes equivalent replacements or changes, and should be covered within the protection scope of this embodiment.

Claims

1. A welding tool for longitudinal beams of a wind turbine nacelle, characterized in that: include: A working plate (1), wherein four supporting legs (11) are installed at the bottom of the working plate (1), and two welded supporting plates (2) are symmetrically slidably installed at the top of the working plate (1); Two movable clamping mechanisms (3) are slidably mounted on the top of the two welded support plates (2); Two mobile control mechanisms (4) are installed on the top of the two welded support plates (2) and are connected to the two mobile clamping mechanisms (3); Two flip clamping mechanisms (5) are installed on the top of the two welded support plates (2) and cooperate with the two moving clamping mechanisms (3) to fix the longitudinal beam; Two groups of conductive mechanisms (7) are arranged on the top of the two (2), and three extrusion blocks (6) are arranged on the two flip clamping mechanisms (5), and the six extrusion blocks (6) are adapted to the two groups of conductive mechanisms (7).

2. A wind turbine nacelle longitudinal beam welding tool according to claim 1, characterized in that: The top of the working plate (1) is provided with four slide grooves (12), and the four slide grooves (12) are symmetrically arranged in pairs. Two sliders (21) are fixedly installed at the bottom of the two welded support plates (2), and the sliders (21) are slidably connected to the inner walls of the corresponding slide grooves (12). A limiting rod (13) is fixedly installed in the slide groove (12), and a limiting hole (211) is provided on the slider (21), and the two limiting rods (13) are slidably connected to the inner walls of the corresponding limiting holes (211).

3. A wind turbine nacelle longitudinal beam welding tool according to claim 2, characterized in that: The bottom of the welding support plate (2) is provided with two bottom grooves (22), and the top of the working plate (1) is symmetrically fixedly provided with four linear motors (23), the four linear motors (23) are located in the four bottom grooves (22), and the linear motors (23) are fixedly installed on the inner walls of the corresponding bottom grooves (22).

4. A wind turbine nacelle longitudinal beam welding tool according to claim 1, characterized in that: The mobile clamping mechanism (3) comprises a mobile clamping plate (31), the mobile clamping plate (31) is slidably mounted on the top of the working plate (1), a clamping bar unit (32) is fixedly mounted on the inner side of the two mobile clamping plates (31), the clamping bar unit (32) comprises a clamping box (321), a plurality of groups of electromagnets (323) are arranged in the clamping box (321), the plurality of groups of electromagnets (323) are connected in series, and a box cover (322) is fixedly mounted on the outer side of the clamping box (321).

5. A wind turbine nacelle longitudinal beam welding tool as claimed in claim 4, characterized in that: The mobile control mechanism (4) comprises a vertical plate (41) and a pushing plate (47). The vertical plate (41) is fixedly mounted on the top of the working plate (1). Two sliding rods (43) are slidably mounted on the vertical plate (41). The two sliding rods (43) are fixedly mounted on the movable clamping plate (31). The outer ends of the two sliding rods (43) are fixedly mounted with a limiting plate (45). The outer sides of the two sliding rods (43) are sleeved with a return spring (44). One end of the return spring (44) is fixedly mounted on the outer side of the vertical plate (41), and the other end of the return spring (44) is fixedly mounted on the limiting plate (45).

6. A wind turbine nacelle longitudinal beam welding tool as claimed in claim 5, characterized in that: A support pad (48) is fixedly mounted on the top of the push plate (47), a dual-axis motor (49) is fixedly mounted on the top of the support pad (48), both output shafts of the dual-axis motor (49) are fixedly mounted with rotating shafts (411), both outer ends of the two rotating shafts (411) are fixedly mounted with eccentric wheels (412), both eccentric wheels (412) are in contact with the movable clamping plate (31), two bearing seats (410) are fixedly mounted on the top of the support pad (48), the two bearing seats (410) are used to support the two rotating shafts (411), and a displacement sensor (413) is arranged on the top of the push plate (47).

7. A wind turbine nacelle longitudinal beam welding tool as claimed in claim 5, characterized in that: Two balls (471) are embedded in the bottom of the pushing plate (47), and two ball grooves (46) are opened on the top of the working plate (1). The two balls (471) are slidably connected to the inner walls of the two ball grooves (46).

8. A wind turbine nacelle longitudinal beam welding tool as claimed in claim 5, characterized in that: Two buffer hydraulic cylinders (42) are embedded in the vertical plate (41), and the output shafts of the two buffer hydraulic cylinders (42) are fixedly mounted on the two pushing plates (47).

9. A wind turbine nacelle longitudinal beam welding tool according to claim 1, characterized in that: The flip clamping mechanism (5) comprises two support blocks (54), the two support blocks (54) are fixedly mounted on the top of the working plate (1), the two support blocks (54) are rotatably mounted with a flip shaft (56), the same flip connecting strip (51) is fixedly mounted between the two flip shafts (56), the outer sides of the two support blocks (54) are fixedly mounted with a synchronous motor (55), the top of the flip connecting strip (51) is fixedly mounted with a flip rod (52), the inner side of the flip rod (52) is provided with a rubber strip (53), the bottom of the flip connecting strip (51) is provided with an arc surface (57), and three extrusion blocks (6) are fixedly mounted at the bottom of the flip connecting strip (51).

10. A wind turbine nacelle longitudinal beam welding tool as claimed in claim 4, characterized in that: The conductive mechanism (7) comprises three insulating cylinders (71). Three receiving grooves (24) are provided on the top of the welding support plate (2). The three insulating cylinders (71) are mounted on the inner walls of the bottoms of the three receiving grooves (24). First conductive blocks (72) are fixedly mounted in the three insulating cylinders (71). Insulating pads (76) are slidably mounted in the three insulating cylinders (71). Insulating rods (74) are fixedly mounted at the bottoms of the three insulating pads (76). Second conductive blocks (75) are fixedly mounted at the bottom ends of the three insulating rods (74). Reset springs (73) are sleeved on the outer sides of the three insulating rods (74). The bottom ends of the reset springs (73) are fixedly mounted on the inner walls of the insulating cylinders (71). The top ends of the reset springs (73) are fixedly mounted on the bottom ends of the insulating pads (76). The first conductive block (72), the second conductive block (75) and the electromagnet (323) form a loop.

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