Wind power arc structure welding anti-deformation positioning tool

Abstract

The utility model relates to wind power motor production and processing equipment especially wind power arc structure welding anti -deformation positioning frock, a kind of wind power arc structure welding anti -deformation positioning frock, including the end support of two ends with the contact of bottom plate, fixed with two parallelly arranged welding positioning plates between end support, the upper edge of welding positioning plate is spaced apart and arranged with multiple upper limit, the bottom lower edge of welding positioning plate is spaced apart and arranged with multiple lower limit, upper limit and lower limit are positioned and limit to the workpiece for welding, the side positioning plate of same structure is fixed in the both sides of end support, the gap between side positioning plate and welding positioning plate is used to place workpiece, multiple side limit are installed in the interval on side positioning plate. The frock provides basic stability through end support, welding positioning plate adopts parallel double-plate structure design, upper limit with lower limit adjustable lower limit is configured to form two-way constraint in upper edge with spring compensation mechanism, combined with the side limit of side positioning plate to constitute three-dimensional positioning system.

Description

Technical Field

[0001] This utility model relates to wind turbine manufacturing and processing equipment, and in particular to a welding anti-deformation positioning fixture for wind turbine arc structures. Background Technology

[0002] In large arc-shaped structural components such as wind turbine towers (see...) Figure 15 This structure consists of two curved outer plates on both sides and a connecting block in the middle. During the manufacturing process of the connecting block (which needs to be completely welded to the outer plates), controlling welding deformation is a core challenge determining the product's service reliability. Traditional processes face three major technical bottlenecks:

[0003] (1) The problem of deformation accumulation caused by thermodynamic imbalance. The welding heat input causes uneven shrinkage of the material, especially in the area of ​​change of arc curvature, the combined deformation of radial warping and circumferential shrinkage occurs.

[0004] (2) The existing positioning fixtures only adopt rigid structures and lack dynamic adjustment devices, making it impossible to quickly install and unload materials;

[0005] (3) The post-correction process relies on manual intervention and requires secondary processing after welding, which reduces production efficiency by more than 30%.

[0006] In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create a welding anti-deformation positioning tool for wind power arc structures, so as to make it more valuable for industrial use. Utility Model Content

[0007] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a positioning fixture for welding wind power arc structures to prevent deformation.

[0008] This utility model discloses a welding anti-deformation positioning fixture for a wind turbine arc structure, comprising end supports that contact the base plate at both ends, and two parallel welding positioning plates fixed between the end supports. The upper edge of the welding positioning plates is provided with multiple upper limit positions at intervals, and the lower edge of the bottom of the welding positioning plates is provided with multiple lower limit positions at intervals. The upper and lower limit positions restrict the vertical positioning of the workpiece for welding. Side positioning plates with the same structure are fixed on both sides of the end supports. The gap between the side positioning plates and the welding positioning plates is used to place the workpiece. Multiple side limit positions are installed at intervals on the side positioning plates, and the side limit positions restrict the positioning of the outer side of the workpiece for welding.

[0009] This anti-deformation positioning fixture for welding the arc structure of wind turbines provides basic stability through end supports. Its welding positioning plate adopts a parallel double-plate structure design, with an upper limit position with a spring compensation mechanism on the upper edge and an adjustable lower limit position on the lower edge forming a bidirectional constraint. Combined with the side limit position of the side positioning plate, it forms a three-dimensional positioning system. The upper limit position achieves dynamic clamping by driving the first pressure block and the inclined surface of the first pull claw with the first bolt. The lower limit position uses the second bolt to link the second pressure block and the second pull claw for bottom positioning. The side limit position achieves radial constraint by adjusting the top block and the side pull claw through the synergistic action of the limit bolt. The overall mechanism, together with the fine adjustment function of the adjusting screw and the sliding seat, effectively suppresses welding thermal deformation and ensures the dimensional accuracy of the arc structure.

[0010] Furthermore, the upper limit position includes a mounting plate one fixed to the welding positioning plate. A first guide sleeve is installed in the middle of the mounting plate one. A first bolt is screwed into the threaded section inside the first guide sleeve. The first bolt passes through the through hole of the first pressure block. The first pressure block has a first pressure head bent downward at both ends. The inner side of the first pressure head contacts the first upright block at the tail end of the first pull claw. The contact surface between the first pull claw and the first upright block is inclined.

[0011] The upper limit position is fixedly connected to the welding positioning plate through the mounting plate. The first guide sleeve in the middle is threaded with the first bolt to achieve axial adjustment. The first bolt passes through the through hole of the first pressure block and drives it to move in both directions. The first pressure head at both ends of the first pressure block forms a linkage mechanism with the first upright block at the tail end of the first pull claw through the inclined contact surface. When the first bolt is rotated, the first pressure head slides along the inclined surface of the first upright block, forcing the first pull claw to produce radial displacement, thereby realizing elastic clamping and dynamic pressure compensation of the workpiece.

[0012] Furthermore, there is a spring sleeved between the first guide sleeve and the first pressure block, which is fitted onto the first bolt.

[0013] In this structure, the spring is sleeved on the first bolt and located between the first guide sleeve and the first pressure block. When the first bolt is rotated and loosened, the elastic restoring force of the spring pushes the first pressure block to move upward and reset, causing the first pressure head to disengage from the first upright block, thereby releasing the first pull claw from the workpiece and realizing the quick release function.

[0014] Furthermore, two parallel first limiting blocks are fixed at both ends of the mounting plate. First positioning pins are installed in the two first limiting blocks on the same side, and the first positioning pins pass through the waist-shaped holes of the first pull claw.

[0015] Two sets of parallel first limiting blocks symmetrically arranged at both ends of the mounting plate form a guide frame. The first positioning pin embedded in each set of first limiting blocks passes through the waist-shaped hole of the first pull claw, forming a sliding pair mechanism. This structure not only restricts the displacement degree of freedom of the first pull claw along the axis of the first positioning pin, but also allows the first pull claw to perform radial compensation movement during the clamping process through the length of the waist-shaped hole, ensuring the adaptive adjustment capability when the first pressure head contacts the workpiece.

[0016] Furthermore, the lower limit includes a lower support fixed to the lower end of the welding positioning plate. The lower end of the lower support is fixed with a second mounting plate by bolts. A second guide sleeve is installed in the middle of the second mounting plate. A second bolt is screwed into the threaded section inside the second guide sleeve. The second bolt passes through the through hole of the second pressure block. The two ends of the second pressure block have second pressure heads that bend downwards. The inner side of the second pressure head contacts the second upright block at the tail end of the second pull claw. The contact surface between the second pull claw and the second upright block is inclined.

[0017] The lower limit is rigidly connected to the welding positioning plate through the lower support. The mounting plate is fixed to the bottom of the lower support by bolts to form a bearing platform. The second guide sleeve assembled in the middle forms a spiral transmission mechanism with the second bolt through the threaded section. When the second bolt passes through the through hole of the second pressure block, the rotational motion is converted into the linear lifting and lowering of the second pressure block. The second pressure head with its two ends bent downwards cooperates with the second vertical block inclined surface at the tail end of the second pull claw. The vertical pressure is converted into the horizontal clamping force of the second pull claw by using the inclined surface self-locking principle, so as to realize the precise positioning and flexible clamping function of the lower edge of the workpiece.

[0018] Furthermore, there is a spring sleeved between the second guide sleeve and the second pressure block, which is fitted onto the second bolt.

[0019] A spring fitted onto the second bolt is installed between the second guide sleeve and the second pressure block. When the second bolt is rotated and released, the elastic restoring force of the spring pushes the second pressure block upward to reset, causing the second pressure head to disengage from the inclined surface of the second vertical block, thereby releasing the second pull claw from the workpiece and achieving a rapid release function.

[0020] Furthermore, two parallel second limiting blocks are fixed at both ends of the upper part of the mounting plate 2. The two second limiting blocks on the same side are equipped with second positioning pins, which pass through the waist-shaped holes of the second pull claw.

[0021] Two sets of parallel second limiting blocks symmetrically installed at both ends of the mounting plate form a guiding mechanism. The second positioning pin installed in each set of second limiting blocks passes through the waist-shaped hole of the second claw, forming a sliding constraint pair. This structure not only restricts the degree of freedom of the second claw along the axis of the second positioning pin, but also allows the second claw to make radial adaptive displacement during the clamping process through the length of the waist-shaped hole, ensuring the flexibility compensation capability when the second pressure head contacts the workpiece. At the same time, the parallel arrangement of the second limiting blocks ensures the linear accuracy of the movement trajectory of the second claw.

[0022] Furthermore, the second guide sleeve has two recessed guide holes at the position opposite to the second pull claw, and the tail end of the second pull claw is fixed with a guide rod that can move within the guide holes.

[0023] The end face of the second guide sleeve facing the second pull claw has two symmetrically arranged concave guide holes. The guide rod rigidly connected to the tail end of the second pull claw is precisely inserted into the guide hole to form a sliding pair. This structure achieves precise guidance of the radial movement of the second pull claw through the clearance fit between the guide rod and the guide hole, effectively eliminating the lateral wobble generated when the second pressure head clamps the workpiece. At the same time, the depth of the guide hole limits the stroke of the guide rod, ensuring that the second pull claw has sufficient clamping stroke and preventing over-displacement that could cause the mechanism to jam.

[0024] Furthermore, the lower edge of the side positioning plate contacts the lower support fixed on both sides of the end support. The two ends of the side positioning plate are movably mounted with adapter plates via pins. The adapter plates are mounted on the end support by bolts. Adjusting bolts are screwed into the screw holes on the side positioning plate. The top of the adjusting bolts contacts the end face of the adapter plate. There is a vertical side stop on the outer side of the upper edge of the lower support.

[0025] The side positioning plate forms a reference contact surface with the lower supports on both sides of the end support through its lower edge. The two ends of the plate are flexibly connected to the end support through the adapter plate hinged by the pin. The bolt fixing structure of the adapter plate provides the main support rigidity. At the same time, the adjusting bolts mounted on the side positioning plate realize the function of fine adjustment of the plate tilt angle by pressing the end face of the adapter plate. The side stop is vertically set on the outer side of the upper edge of the lower support. By rigidly blocking the outer edge of the end of the side positioning plate, it restricts its lateral displacement and prevents the side positioning plate from slipping off the contact surface of the lower support under load or vibration conditions, thus ensuring the structural stability and reliability of the positioning system.

[0026] Furthermore, the outer side of the side positioning plate has two mounting strips of equal height for installing side limiters;

[0027] The side limiter includes two sets of identical "U"-shaped side limiter bases. A top block is placed inside the side limiter base. A limiter bolt is screwed into the threaded hole of the top block. The end of the limiter bolt is a locking block that is locked between two mounting strips. The end of the locking block contacts the surface of the side positioning plate. Side pull claws are movably installed at both ends of the top block through pins.

[0028] Multiple upper and lower pressure blocks are fixed to the upper and lower edges of the side positioning plate by bolts.

[0029] Two parallel mounting strips of equal height on the outer side of the side positioning plate form the assembly reference for the side limit. The limiting mechanism consists of two sets of symmetrically arranged "Z"-shaped side limiting bases. The top block embedded inside receives the limiting bolt through the threaded hole. The locking block at the end of the bolt is inserted into the gap of the mounting strip with an interference fit and presses against the surface of the side positioning plate to form a rigid constraint. At the same time, the side pull claws hinged at both ends of the top block realize adaptive adjustment when clamping the workpiece. Together with the upper and lower pressure blocks bolted to the upper and lower edges of the side positioning plate, they form a composite positioning system with three-dimensional adjustable function. This modular design accurately controls the lateral positioning accuracy through the screw-in depth of the limiting bolts, while the upper / lower pressure block group provides axial clamping force to meet the high stability clamping requirements of irregularly shaped workpieces.

[0030] Furthermore, one end of the surface of each welding positioning plate is fixed with a positioning block by bolts, and the other end is fixed with a tightening screw support block, and a tightening screw is screwed into the screw hole of the tightening screw support block.

[0031] One end of the welding positioning plate is bolted to a positioning block as a reference surface, and the other end is fitted with a tightening screw support block. The tightening screw in the screw hole can adjust the tightening force to achieve bidirectional positioning and clamping of the workpiece.

[0032] Furthermore, a screw tail end fixing seat is fixed at the bottom of the welding positioning plate. The screw tail end fixing seat is movably installed with the tail end of the adjusting screw through a pin. A sliding seat is fixed at the bottom of the side positioning plate. The adjusting screw passes through the sliding seat, and nuts are screwed on both ends of the adjusting screw.

[0033] The screw tail end fixing seat set at the bottom of the welding positioning plate is hinged to the tail end of the adjusting screw through a pin to form a movable connection. The sliding seat fixed at the bottom of the side positioning plate passes through the adjusting screw to form a sliding pair. The nuts assembled at both ends of the screw realize bidirectional locking adjustment. This mechanism can precisely control the distance between the two positioning plates by rotating the nuts.

[0034] By means of the above-described solution, the present invention has at least the following advantages:

[0035] 1. Prevent deformation:

[0036] Precise positioning: The tooling positioning device can accurately determine the position and angle of the wind turbine arc structure based on its geometry and size, ensuring a high degree of fit with the welding position required by the design, thus preventing welding deformation caused by positional deviation of the structure from the source.

[0037] Rigid fixing: The clamping device applies sufficient clamping force to keep the structural components fixed during the welding process, effectively resisting the displacement and deformation caused by welding stress, ensuring the dimensional accuracy and shape integrity of the structural components, and reducing the cost and difficulty of subsequent straightening processes.

[0038] 2. Improve welding efficiency:

[0039] Rapid positioning: The synergistic effect of the positioning device and the clamping device makes the installation and fixing of wind turbine arc structure components more convenient and faster, reduces the time for manual adjustment and clamping, improves welding efficiency, and shortens the production cycle.

[0040] High adaptability: The distance between the side positioning plate and the welding positioning plate can be adjusted according to different specifications and models of wind power arc structure components. It has high versatility and flexibility, and can quickly adapt to the welding requirements of different products, reducing the time for changing tooling and further improving production efficiency.

[0041] 3. Ensure welding quality:

[0042] Stable welding process: The tooling provides stable support for the main frame, ensuring the stability of the structural components during the welding process. This is beneficial for welders to perform welding operations, improves welding quality, reduces the incidence of welding defects, and increases the product qualification rate.

[0043] 4. Facilitates quality control: Due to the high positioning accuracy of the tooling, the position and posture of the structural components are stable during the welding process, which facilitates quality monitoring and inspection of the welding process, enables timely detection and correction of welding quality problems, and ensures the quality stability of the product.

[0044] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of this utility model;

[0047] Figure 2 This is the utility model Figure 1 Bottom structure diagram;

[0048] Figure 3 This is a schematic diagram of the upper limit position of this utility model;

[0049] Figure 4 This is a utility model Figure 3 Another perspective illustration;

[0050] Figure 5 This is an assembly diagram of the welding positioning plate and the lower limit of this utility model;

[0051] Figure 6 This is the utility model Figure 5 A magnified view of a portion of the image;

[0052] Figure 7 This is a schematic diagram of the lower limit position of this utility model. Figure 1 ;

[0053] Figure 8 This is a schematic diagram of the lower limit position of this utility model. Figure 2 ;

[0054] Figure 9 This is an installation diagram of the side positioning plate and side limiting device of this utility model;

[0055] Figure 10 This is the utility model Figure 9 Another perspective illustration;

[0056] Figure 11 This is the utility model Figure 1 Enlarged schematic diagram of region A;

[0057] Figure 12 This is a schematic diagram of the side limiting structure of this utility model;

[0058] Figure 13 This is an assembly diagram of the welding positioning plate, positioning block, and tightening screw support block of this utility model;

[0059] Figure 14 This is the utility model Figure 2 Enlarged view of region B in the middle;

[0060] Figure 15 This is a schematic diagram of the structure of the workpiece that needs to be welded and formed according to this utility model.

[0061] In the diagram: 1. End support; 2. Welded positioning plate; 3. Upper limit stop; 4. Lower limit stop; 5. Side positioning plate; 6. Side limit stop; 7. Mounting plate one; 8. First guide sleeve; 9. First bolt; 10. First pressure block; 11. First pressure head; 12. First pull claw; 13. First upright block; 14. First limit block; 15. First positioning pin; 16. Lower support; 17. Mounting plate two; 18. Second guide sleeve; 19. Second bolt; 20. Second pressure block; 21. Second pressure head; 22. Second pull claw. 23. Second upright block; 24. Second limiting block; 25. Second positioning pin; 26. Guide rod; 27. Lower support; 28. Adapter plate; 29. ​​Adjusting bolt; 30. Side stop; 31. Mounting strip; 32. Side limiting base; 33. Top block; 34. Limiting bolt; 35. Clamping block; 36. Side pull claw; 37. Upper pressure block; 38. Lower pressure block; 39. Positioning block; 40. Tightening screw support block; 41. Tightening screw; 42. Screw tail end fixing seat; 43. Adjusting screw; 44. Sliding seat. Detailed Implementation

[0062] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0063] See Figure 1 and Figure 2 The anti-deformation positioning fixture for welding the arc structure of the wind power plant is formed by the end support 1 being stably connected to the foundation to form an overall frame. The welding positioning plates 2 are arranged in parallel to form the main positioning reference. The upper limit 3 and lower limit 4 form an upper and lower clamping system to accurately control the vertical displacement of the workpiece. The side limit 6 on the side positioning plate 5 realizes three-dimensional omnidirectional constraint, effectively suppressing thermal deformation during the welding process. The modular positioning components are used to achieve rapid clamping. The multi-directional limit mechanism works together to ensure the geometric stability of the arc structure during the welding process. At the same time, the combination design of the rigid frame and the adjustable limit device ensures both positioning accuracy and adaptability to workpieces of different specifications.

[0064] See Figure 3 The upper limit position 3 is rigidly connected to the welding positioning plate 2 through the mounting plate 7 to form a stable base. The first guide sleeve 8 provides precision guidance to ensure the vertical movement accuracy of the first bolt 9. When the first bolt 9 is rotated, it drives the first pressure block 10 to move axially. The first pressure head 11 at both ends pushes the first pull claw 12 and the first upright block 13 at the tail end through the inclined plane mechanism to achieve radial clamping action. The combined drive method of screw transmission and inclined plane mechanism not only ensures the reliability of high load clamping, but also achieves precise control of clamping force through adjustable bolts. The inclined plane contact structure makes the clamping force automatically compensated with the thickness of the workpiece, which is particularly suitable for the dynamic anti-deformation requirements when welding arc components.

[0065] In this structure, the spring sleeved on the first bolt 9 is located between the first guide sleeve 8 and the first pressure block 10. Its main function is to provide elastic restoring force when the first bolt 9 is loosened, pushing the first pressure block 10 to move upward and reset automatically. The pre-compression design of the spring achieves a rapid release function, which not only ensures that the clamping mechanism can be released from the workpiece in time to complete the disassembly operation, but also avoids the inefficiency of traditional threaded mechanisms that need to be completely unscrewed, significantly improving the tooling repeatability and positioning efficiency. At the same time, the spring's buffering characteristics can also prevent rigid impact during the reset process and extend the service life of the mechanism.

[0066] See Figure 4 The two sets of first limiting blocks 14 symmetrically arranged at both ends of the mounting plate 7 form a rigid guide frame. Through the sliding cooperation between the first positioning pin 15 inserted between them and the waist-shaped hole of the first pull claw 12, the radial clamping motion of the first pull claw 12 is converted into a precise linear displacement. The double limiting block layout ensures that the parallelism error of the positioning pin 15 is small, and the waist-shaped hole design allows the first pull claw 12 to adaptively compensate for the workpiece size deviation within a certain range, forming a composite guide system with both high positioning accuracy and flexible tolerance.

[0067] When it is necessary to clamp the workpiece, after the workpiece is placed in place, the first bolt 9 is rotated, which drives the first pressure block 10 to move down. The first pressure heads 11 on both sides of the first pressure block 10 force the first pull claws 12 to move inward, thus completing the binding of the workpiece.

[0068] When the unloading operation is required, the first bolt 9 is rotated in the reverse direction. The first bolt 9 releases the pressure applied to the first pressure block 10. Under the action of the spring, the first pressure block 10 returns to its original position. The first pressure head 11 disengages from the first upright block 13 at the tail end of the first pull claw 12. Then, the first pull claw 12 can be manually disengaged from the workpiece, making it convenient for the workpiece to be unloaded.

[0069] See Figures 5-7 The lower limit mechanism forms a rigid base with the mounting plate 17 through the lower support 16 below the welding positioning plate 2. When the second bolt 19 rotates in the second guide sleeve 18, it pushes the second pressure block 20 to move axially. The second pressure head 21 at both ends drives the second vertical block 23 at the tail end of the second claw 22 by means of inclined surface contact, converting the vertical pressure into the horizontal clamping motion of the second claw 22. The claw-shaped mechanism at the end of the second claw 22 hooks onto the workpiece to complete the fixation.

[0070] The lower limit mechanism has a reset spring sleeved on the second bolt 19 between the second guide sleeve 18 and the second pressure block 20. When the second bolt 19 is loosened, the elastic restoring force of the spring pushes the second pressure block 20 to move up and reset automatically. The spring pre-compression design realizes the rapid release function, so that the second pressure block 20 can disengage from the second pull claw 22 in time.

[0071] When it is necessary to clamp the workpiece, after the workpiece is placed in place, rotate the second bolt 19 to drive the second pressure block 20 to move down. The second pressure heads 21 on both sides of the second pressure block 20 force the second pull claws 22 to move inward, thus completing the binding of the workpiece.

[0072] When unloading is required, the second bolt 19 is rotated in the opposite direction. The second bolt 19 releases the pressure applied to the second pressure block 20. Under the action of the spring, the second pressure block 20 returns to its original position. The second pressure head 21 disengages from the second upright block 23 at the tail end of the first pull claw 12. Subsequently, the second pull claw 22 can be manually disengaged from the workpiece, facilitating workpiece unloading.

[0073] See Figure 7 and Figure 8 The mounting plate 17 forms a high-precision guide track through two sets of symmetrically arranged second limit blocks 24, and the second positioning pin 25 passes through the waist-shaped hole of the second claw 22 to realize the linear constraint of the radial movement of the claw.

[0074] The lower limit mechanism forms a sliding pair with the guide rod 26 at the tail end of the second claw 22 through the concave guide holes on both sides of the second guide sleeve 18. The diameter of the guide rod 26 is precisely matched with the guide hole, so as to realize the smooth linear motion of the second claw 22 during the wedge drive process.

[0075] See Figure 1 and Figure 11 The contact surface between the lower edge of the side positioning plate 5 and the lower support 27 achieves vertical positioning. The hinge structure formed by the adapter plate 28 and the pin allows the side positioning plate 5 to move back and forth within a certain range, which facilitates the loading of the workpiece. After loading is completed, the side positioning plate 5 is moved outward by rotating the adjusting bolt 29 to provide lateral tension to the workpiece and ensure accurate workpiece positioning.

[0076] See Figures 10-12 The embedded cooperation between the mounting strip 31 and the locking block 35 enables the quick assembly and disassembly of the side limiter 6. The top block 33 inside the "U"-shaped side limiter base 32 achieves fine-tuning of the stroke through the limit bolt 34. The movable side pull claw 36 can adapt to the workpiece angle deviation within a range of 15°. With the bidirectional clamping structure formed by the upper pressure block 37 and the lower pressure block 38, when the workpiece is placed, the workpiece is stuck between the upper pressure block 37 and the lower pressure block 38. The side pull claw 36 is manually rotated to hook onto the side wall of the workpiece. The lower side pull claw 36 requires additional support to prevent it from falling off. Then, the limit bolt 34 is rotated to move the side pull claw 36 outward to tighten the workpiece, so that the workpiece is always attached to the side positioning plate 5, thus completing the fixation of the workpiece. After welding is completed, it is only necessary to rotate the limit bolt 34 in the opposite direction to remove the side pull claw 36 from the workpiece, and then the workpiece can be removed.

[0077] join Figure 13The workpiece is positioned bidirectionally by the synergistic action of the positioning block 39 and the tightening screw 41. The positioning block 39 provides a reference positioning surface, the tightening screw support block 40 serves as a rigid support carrier, and the screwed-in tightening screw 41 can limit the lateral position of the workpiece.

[0078] See Figure 14 Flexible adjustment is achieved by connecting the screw tail end fixing seat 42 and the adjusting screw 43 with a pin. The sliding seat 44 at the bottom of the side positioning plate 5 and the adjusting screw 43 passing through it form a precision guiding mechanism. The double nut locking structure ensures positioning stability. This design can realize stepless adjustment of the distance between the welding positioning plate 2 and the side positioning plate 5, and is suitable for clamping operations of workpieces of various sizes.

[0079] The working principle of this utility model is as follows:

[0080] Before using this wind power arc structure welding anti-deformation positioning fixture, the outer plate and middle plate required in the workpiece are first placed and positioned outside the fixture (this step is workpiece pretreatment and is not the function of the fixture in this application). Then, the connection spot welding is performed to initially shape the workpiece, making it easy to place it into the fixture.

[0081] When clamping the workpiece, first rotate the nuts located on both sides of the adjusting screw 43 to move the nuts away from the sliding seat 44, releasing the lower end positioning of the opposite side positioning plate 5. Then rotate the adjusting bolt 29. Since the front end of the adjusting bolt 29 is in contact with the adapter plate 28, rotating the adjusting bolt 29 will move the side positioning plate 5 away from the welding positioning plate 2. After the side positioning plate 5 is away from the welding positioning plate 2, rotate the adjusting bolt 29 in the opposite direction to move the adjusting bolt away from the adapter plate 28 to avoid affecting the movement of the side positioning plate 5. At this time, the gap between the welding positioning plate 2 and the side positioning plate 5 is greater than the width of the workpiece. Use a hoisting mechanism such as a crane to lift and move the workpiece into the gap between the welding positioning plate 2 and the side positioning plate 5, so that the outer plates on both sides of the workpiece are slightly higher than the lower pressure block 38 at the bottom of the positioning plate 5 and the welding positioning plate 2. The bottom support block structure is then adjusted by reverse adjustment of the nuts on both sides of the screw 43, which moves the side positioning plate 5 inward to ensure that the bottom of the outer plates on both sides of the workpiece is above the lower pressure block 38 at the bottom of the positioning plate 5 and the block structure used for bottom support of the welding positioning plate 2. At this time, the workpiece is slowly lowered by the hoisting mechanism, and the bottom of the outer plates on both sides of the workpiece is placed on the lower pressure block 38 at the bottom of the positioning plate 5 and the block structure used for bottom support of the welding positioning plate 2. Then, the tightening screw 41 located at the end of the welding positioning plate 2 is rotated, and the end of the tightening screw 41 is pressed against one end face of the workpiece. The screw is continuously rotated to push the other end of the workpiece onto the positioning block 39 to complete the lateral limit. Finally, the nuts on both sides of the adjusting screw 43 are rotated to move the side positioning plate 5 inward to clamp it, completing the initial limit of the workpiece.

[0082] After the workpiece is initially positioned, the upper and lower ends of the workpiece are clamped and positioned by the upper limit 3 and lower limit 4 installed on the upper and lower sides of the welding positioning plate 2.

[0083] Side limiters 6 are installed on side positioning plates 5. After the workpiece is initially limited, side pull claws 36 are hooked onto the outer plate of the workpiece. Then, the limit bolts 34 are rotated to move the side pull claws 36 outward to tighten the outer plate of the workpiece. With an upper limiter 3 and a lower limiter 4, both outer plates of the workpiece can be pulled in and limited to complete the final fixed installation of the workpiece. At this time, the front, back, top, bottom, left and right sides of the workpiece are fixed and limited, so it is not easy to deform due to welding during the welding operation.

[0084] After welding is completed, release all the limiting mechanisms to remove the workpiece.

[0085] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0086] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0087] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A wind power arc structure welding anti-deformation positioning tool, comprising an end support (1) in contact with the bottom plate at both ends, characterized in that: Two parallel welding positioning plates (2) are fixed between the end supports (1). Multiple upper limit positions (3) are arranged at intervals along the upper edge of the welding positioning plates (2), and multiple lower limit positions (4) are arranged at intervals along the bottom lower edge of the welding positioning plates (2). The upper limit positions (3) and lower limit positions (4) restrict the upper and lower positioning of the workpiece for welding. Side positioning plates (5) with the same structure are fixed on both sides of the end supports (1). The gap between the side positioning plates (5) and the welding positioning plates (2) is used to place the workpiece. Multiple side limit positions (6) are installed at intervals on the side positioning plates (5). The side limit positions (6) restrict the positioning of the outer part of the workpiece for welding.

2. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 1, characterized in that: The upper limit position (3) includes a mounting plate (7) fixed to the welding positioning plate (2). A first guide sleeve (8) is installed in the middle of the mounting plate (7). A first bolt (9) is screwed into the threaded section of the first guide sleeve (8). The first bolt (9) passes through the through hole of the first pressure block (10). The first pressure block (10) has a first pressure head (11) bent downward at both ends. The inner side of the first pressure head (11) contacts the first upright block (13) at the tail end of the first pull claw (12). The contact surface between the first pull claw (12) and the first upright block (13) is inclined.

3. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 2, characterized in that: There is a spring sleeved on the first bolt (9) between the first guide sleeve (8) and the first pressure block (10).

4. A welding anti-deformation positioning fixture for wind turbine arc structures according to claim 2 or 3, characterized in that: Two parallel first limiting blocks (14) are fixed at both ends of the mounting plate (7). The two first limiting blocks (14) on the same side are equipped with first positioning pins (15). The first positioning pins (15) pass through the waist-shaped hole of the first pull claw (12).

5. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 1, characterized in that: The lower limit (4) includes a lower support (16) fixed to the lower end of the welding positioning plate (2). The lower end of the lower support (16) is fixed with a second mounting plate (17) by bolts. A second guide sleeve (18) is installed in the middle of the second mounting plate (17). A second bolt (19) is screwed into the threaded section inside the second guide sleeve (18). The second bolt (19) passes through the through hole of the second pressure block (20). The two ends of the second pressure block (20) have a second pressure head (21) bent downward. The inner side of the second pressure head (21) contacts the second upright block (23) at the tail end of the second pull claw (22). The contact surface between the second pull claw (22) and the second upright block (23) is inclined.

6. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 5, characterized in that: There is a spring sleeved on the second bolt (19) between the second guide sleeve (18) and the second pressure block (20).

7. A welding anti-deformation positioning fixture for wind turbine arc structures according to claim 5 or 6, characterized in that: Two parallel second limiting blocks (24) are fixed at both ends of the mounting plate 2 (17). The two second limiting blocks (24) on the same side are equipped with second positioning pins (25). The second positioning pins (25) pass through the waist-shaped hole of the second pull claw (22).

8. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 7, characterized in that: The second guide sleeve (18) has two recessed guide holes opposite to the second pull claw (22), and the tail end of the second pull claw (22) is fixed with a guide rod (26) that can move in the guide holes.

9. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 1, characterized in that: The lower edge of the side positioning plate (5) contacts the lower supports (27) fixed on both sides of the end support (1). The two ends of the side positioning plate (5) are movably installed with adapter plates (28) through pin shafts. The adapter plates (28) are installed on the end support (1) by bolts. An adjusting bolt (29) is screwed into the screw hole on the side positioning plate (5). The top end of the adjusting bolt (29) contacts the end face of the adapter plate (28). There is a vertical side stop (30) on the outer side of the upper edge of the lower support (27).

10. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 9, characterized in that: There are two equal-height mounting strips (31) on the outer side of the side positioning plate (5) for mounting the side limit (6). The side limit (6) includes two sets of "U"-shaped side limit bases (32) with the same structure. A top block (33) is placed inside the side limit base (32). A limit bolt (34) is screwed into the threaded hole of the top block (33). The end of the limit bolt (34) is a clamping block (35) stuck between the two mounting strips (31). The end of the clamping block (35) contacts the surface of the side positioning plate (5). The two ends of the top block (33) are movably installed with side pulling claws (36) through pin shafts. Multiple upper pressing blocks (37) and lower pressing blocks (38) are respectively fixed on the upper edge and the lower edge of the side positioning plate (5) by bolts.

11. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 10, characterized in that: One end of the surface of each welding positioning plate (2) is fixed with a positioning block (39) by a bolt, and the other end is fixed with a top tightening screw support block (40). A top tightening screw (41) is screwed into the screw hole of the top tightening screw support block (40).

12. The anti-deformation positioning fixture for welding wind turbine arc structures according to claim 11, characterized in that: A screw tail end fixing seat (42) is fixed at the bottom of the welding positioning plate (2). The tail end of the adjusting screw (43) is movably installed in the screw tail end fixing seat (42) through a pin shaft. A sliding seat (44) is fixed at the bottom of the side positioning plate (5). The adjusting screw (43) passes through the sliding seat (44), and nuts are screwed on both ends of the adjusting screw (43).

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