A bearing seat base welding tool for a wind power generator

Abstract

This invention relates to the field of welding equipment technology, specifically to a welding fixture for a bearing seat base of a wind turbine generator. The fixture includes a gantry frame, with a first motor mounted on the upper end of the sliding rod of the gantry frame. The output shaft of the first motor is fixedly connected to a connecting frame. First electric slide rails are mounted on both sides of the connecting frame. A side stiffener welding mechanism is provided on the inner side of the first electric slide rails, and a clamping mechanism is provided on the inner side of the side stiffener welding mechanism. A second motor drives a rotating box to rotate 90 degrees, switching the positioning component from a vertical to a horizontal state, suitable for welding longitudinal stiffeners. A third motor drives an assembly plate to rotate 90 degrees, causing the clamping mechanism to spatially offset from the second motor, suitable for welding transverse arc-shaped reinforcing ribs. The switching between the two postures is spatially independent, significantly shortening the connection time and improving work efficiency compared to existing disassembly and adjustment methods.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding fixture for a bearing housing base of a wind turbine generator. Background Technology

[0002] With the increasing power output of wind turbine generators and the rapid development of offshore wind power, the size and weight of bearing housings for large wind turbine generators have significantly increased. The adoption of steel plate welded structures to replace traditional casting processes has become a trend. This requires composite welding of side stiffeners and transverse arc-shaped reinforcing ribs to ensure structural strength, while also meeting the requirements for weld corrosion resistance and assembly compatibility under harsh outdoor environments. Currently, the welding equipment manufacturing field faces numerous technical bottlenecks in developing dedicated welding auxiliary devices for such large components.

[0003] Firstly, the positioning and clamping accuracy is insufficient, relying on manual calibration or a single positioning mechanism, which is difficult to adapt to the spatial positioning requirements of stiffeners of different sizes. Uncontrolled clamping force can easily lead to stiffener deformation and workpiece movement, causing defects such as incomplete or false welds. Secondly, the connection between longitudinal vertical welds and transverse arc welds requires disassembly and adjustment of the working posture, a cumbersome process prone to interference, resulting in uneven weld transitions and poor integrity. Thirdly, welding and post-weld chamfering and grinding are separate processes, which are not only inefficient but also prone to stiffener displacement during grinding. The resulting burrs and sharp angles can affect subsequent assembly accuracy and even scratch components. Furthermore, existing fluxes are mostly pre-coated, making precise synchronous supply during welding difficult and hindering effective improvement of weld fusion and corrosion resistance. Therefore, we propose a welding fixture for the bearing housing base of a wind turbine generator. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a welding fixture for the bearing seat base of a wind turbine generator.

[0005] The technical solution adopted by this invention to solve its technical problem is: a welding fixture for a bearing seat base of a wind turbine generator, including a gantry frame, a first motor installed on the upper end of the slide rod of the gantry frame, a connecting frame fixedly connected to the output shaft of the first motor, first electric slide rails installed on both sides of the connecting frame, a side stiffener welding mechanism provided on the inner side of the first electric slide rail, the side stiffener welding mechanism including a positioning component for positioning, the positioning component including an assembly plate, the side stiffener welding mechanism further including a welding component for adjusting the welding angle, a clamping mechanism provided on the inner side of the side stiffener welding mechanism, the clamping mechanism including an adjustment component for positioning the side panel and the reinforcing rib, and a chamfering component for chamfering.

[0006] Preferably, the positioning component includes a movable block disposed inside the first electric slide rail, a mounting plate fixedly connected to one side of the movable block, a second motor mounted at the front end of the mounting plate, a rotating box rotatably connected to the inner side of the mounting plate via a rotating shaft, a third motor mounted inside the rotating box, the output shaft of the second motor fixedly connected to the rotating box, the output shaft of the third motor fixedly connected to the assembly plate, a first vision sensor mounted at both the front and rear ends of the assembly plate, and a flux tank fixedly connected to the other side of the movable block.

[0007] Preferably, cavities are formed on the adjacent sides of the two assembly plates. Two guide rods are fixedly connected to the inner side of the assembly plates. An L-shaped slide rod is slidably connected to the outer side of the two guide rods. The two L-shaped slide rods are symmetrically arranged on the inner side of the assembly plates. A rack is fixedly connected to the adjacent end of the two L-shaped slide rods. A second electric slide rail is installed at the distant end of the two L-shaped slide rods. A moving plate is provided on the outer side of the second electric slide rail. A cylinder is installed on the other side of the moving plate.

[0008] Preferably, a mounting bracket is fixedly connected to the side of each of the two mounting plates that are close to each other, and a first gear is rotatably connected to the side of each of the two mounting brackets that are far apart from each other. The outer side of the first gear meshes with a rack. A fourth motor is installed on the side of each of the two mounting brackets that are close to each other, and the output shaft of the fourth motor is fixedly connected to the first gear.

[0009] Preferably, the output shaft of the cylinder is fixedly connected to a mounting box, and a first partition is fixedly connected to the inner side of the mounting box. A fifth motor is installed on one side of the first partition, and a second gear is rotatably connected to the other side of the fifth motor. Two third gears are meshed on the outer side of the second gear. One end of the third gear is rotatably connected to the first partition. An eccentric shaft is fixedly connected to the same position at the same end of the two third gears. A rocking plate is rotatably connected to the outer side of the two eccentric shafts.

[0010] Preferably, a second partition is fixedly connected to the inner side of the mounting box, and a circular through hole is opened on the outer side of the second partition. A magnetic ring is fixedly connected to one side of the second partition, and a spherical shell is rotatably connected to the inner side of the magnetic ring. The spherical shell is made of magnetic metal. The other side of the second partition is in contact with the rocking plate, and one end of the second gear is fixedly connected to the spherical shell through a universal coupling.

[0011] Preferably, a second vision sensor is installed on the outer side of the spherical shell. The second vision sensor has a ring design. A first electric actuator is installed on the inner side of the spherical shell. The output shaft of the first electric actuator is provided with a welding head. The output shaft of the first electric actuator is provided with a solenoid valve spray head through a bracket. The input port of the solenoid valve spray head is fixedly connected to the flux tank through a hose.

[0012] Preferably, a support guide rail is fixedly connected to the front end of the assembly plate, and two mutually symmetrical third electric slide rails are installed on the upper end of the support guide rail. A sliding plate is provided on the upper end of the two third electric slide rails, and a fixing frame is fixedly connected to the upper end of the sliding plate. A second electric push rod is installed on the inner side of the fixing frame, and a pressure sensor is provided on the inner side of the second electric push rod.

[0013] Preferably, the output shaft of the second electric actuator is rotatably connected to two cross-symmetrical first connecting rods via a rotating shaft. The other end of the first connecting rod is rotatably connected to a guide slide rod via a rotating shaft. A guide sleeve is slidably connected to the outer side of the guide slide rod. The outer side of the guide sleeve is fixedly connected to the fixing frame via a connecting rod. A second connecting rod is fixedly connected to the same end of both guide slide rods.

[0014] Preferably, an L-shaped hollow rod is fixedly connected to the other side of the second connecting rod, a sixth motor is installed on the outer side of the L-shaped hollow rod, the output shaft of the sixth motor is fixedly connected to a spring telescopic rod through a coupling, and a friction plate is fixedly connected to the other end of the spring telescopic rod.

[0015] Compared with the prior art, the present invention provides a welding fixture for the bearing housing base of a wind turbine generator, which has the following advantages: 1. The first vision sensor at the front and rear ends of the assembly plate works in conjunction with the second annular vision sensor on the outside of the spherical shell to collect the spatial position data of the side stiffeners and reinforcing ribs in real time and accurately calibrate the working posture; the fourth motor drives the first gear to mesh with the rack, which drives the L-shaped slide rod to slide smoothly in opposite directions along the guide rod. Combined with the length adaptation of the second electric slide rail and the vertical displacement of the moving block, the positioning component can accurately adapt to stiffener structures of different sizes. The positioning deviation is significantly reduced compared with the existing technology, and the weld offset problem caused by inaccurate positioning is completely avoided. The second electric actuator, through the coordinated transmission of the first connecting rod, guide slide rod and second connecting rod, drives the L-shaped cavity rod to gradually tighten, and cooperates with the third electric slide rail to drive the sliding plate to feed, so as to achieve a tight fit between the stiffener and the outer wall of the bearing seat; the pressure sensor on the inner side of the second electric actuator monitors the clamping force in real time and dynamically adjusts the clamping strength, so as to avoid the workpiece movement caused by excessive clamping and the deformation of the stiffener caused by excessive clamping. This effectively solves the problem of dry welding and incomplete welding caused by uncontrolled clamping force in the existing technology, and ensures that the fit of the welded surface meets the structural strength requirements of large wind power components.

[0016] 2. The second motor drives the rotating box to rotate 90 degrees, so that the positioning component switches from a vertical state to a horizontal state, which is suitable for welding longitudinal stiffeners; the third motor drives the assembly plate to rotate 90 degrees, so that the clamping mechanism is spatially offset from the second motor, which is suitable for welding transverse arc-shaped reinforcing ribs. There is no spatial interference in the switching process between the two postures, which greatly shortens the connection time and improves the work efficiency compared with the existing disassembly and adjustment mode. The fifth motor drives the eccentric shaft to drive the swaying plate through the second and third gears, which, in conjunction with the universal coupling, pulls the spherical shell. Under the positioning action of the magnetic ring, the welding head can be adjusted at multiple angles. The extension and retraction of the first electric push rod can compensate for the dimensional tolerances of the weldment in real time, ensuring that the welding head always fits the weld surface. When connecting longitudinal and transverse welding, this adjustment mechanism can quickly adapt to the change of weld angle from a straight line to an arc, avoiding the discontinuity of the weld caused by the lag in angle adjustment in the prior art. This makes the transition between longitudinal and transverse welds smooth, and significantly improves the overall integrity and consistency of the weld. The flux tank on the moving block side is connected to the solenoid valve spray head through a hose. During the welding process, flux is sprayed simultaneously. In conjunction with the welding action of the welding head, it cleans the impurities around the weld in real time, reduces the welding temperature, reduces weld oxidation and cracking, and further improves the welding fusion effect and weld corrosion resistance, meeting the environmental requirements for long-term outdoor service of wind power components.

[0017] 3. The sixth motor on the outside of the L-shaped hollow rod drives the friction plate to rotate via a spring telescopic rod. While the welding mechanism moves downwards via the first electric slide rail, the corner of the rib plate is simultaneously ground. The spring telescopic rod can adaptively fit the dimensional tolerances of vertical or curved surfaces, ensuring that the friction plate always fits tightly against the corner surface. Compared with the existing technology of welding first and then grinding, this eliminates the separate grinding process, significantly improving work efficiency. The rotating grinding of the friction plate can accurately remove burrs and sharp angles around the weld. Combined with the clamping and limiting of the L-shaped hollow rod, it avoids grinding deviations caused by rib plate displacement during grinding. The surface of the rib plate corner is smooth after grinding, effectively solving the problems of burrs scratching the assembly surface after welding or excessive grinding causing excessive fitting gaps in the existing technology. This makes the assembly process of the bearing seat base and subsequent components smoother, reduces assembly difficulty and rework costs, and improves the overall structural stability after assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the side stiffener welding mechanism and clamping mechanism of the present invention; Figure 3 This is a schematic diagram of the overall structure of the side stiffener welding mechanism of the present invention; Figure 4 This is a cross-sectional view of a portion of the positioning component of the present invention. Figure 1 ; Figure 5 This is a cross-sectional view of a portion of the positioning component of the present invention. Figure 2 ; Figure 6 This is a cross-sectional view of the overall structure of the welding assembly of the present invention. Figure 1 ; Figure 7 This is a cross-sectional view of the overall structure of the welding assembly of the present invention. Figure 2 ; Figure 8 This is a top view of the overall structure of the adjustment component of the present invention; Figure 9 This is a cross-sectional view of the overall structure of the chamfering component of the present invention.

[0019] In the diagram: 1. Gantry frame; 2. First motor; 3. Connecting frame; 4. First electric slide rail; 5. Side stiffener welding mechanism; 51. Positioning assembly; 511. Moving block; 512. Mounting clamp; 513. Second motor; 514. Rotating box; 515. Third motor; 516. Assembly plate; 517. Guide rod; 518. L-shaped slide rod; 519. Rack; 5110. Second electric slide rail; 5111. Mounting frame; 5112. First gear; 5113. Fourth motor; 5114. First vision sensor; 5115. Moving plate; 5116. Cylinder; 52. Welding assembly; 521. Mounting box; 522. First partition; 523. Fifth motor; 524. Second gear 525. Third gear; 526. Eccentric shaft; 527. Shaking plate; 528. Second partition plate; 529. Magnetic ring; 5210. Spherical shell; 5211. First electric push rod; 5212. Welding head; 5213. Solenoid valve spray head; 5214. Second vision sensor; 6. Clamping mechanism; 61. Adjustment assembly; 611. Support rail; 612. Third electric slide rail; 613. Sliding plate; 614. Fixing frame; 615. Second electric push rod; 616. First connecting rod; 617. Guide slide rod; 618. Guide sleeve; 619. Second connecting rod; 62. Chamfering assembly; 621. L-shaped cavity rod; 622. Sixth motor; 623. Spring telescopic rod; 624. Friction plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] The following electrical components are all electrically connected via an external PLC controller.

[0022] Please see Figure 1 - Figure 9A welding fixture for a bearing housing base of a wind turbine generator includes a gantry frame 1. A first motor 2 is mounted on the upper end of the slide bar of the gantry frame 1. The output shaft of the first motor 2 is fixedly connected to a connecting frame 3. First electric slide rails 4 are mounted on both sides of the connecting frame 3. A side stiffener welding mechanism 5 is provided on the inner side of the first electric slide rails 4. The side stiffener welding mechanism 5 includes a positioning component 51 for positioning and an assembly plate 516. The side stiffener welding mechanism 5 also includes a welding component 52 for adjusting the welding angle. A clamping mechanism 6 is provided on the inner side of the side stiffener welding mechanism 5. The clamping mechanism 6 includes an adjustment component 61 for positioning the side panel and the reinforcing rib, and a chamfering component 62 for chamfering.

[0023] In this embodiment, the positioning component 51 includes a movable block 511 disposed inside the first electric slide rail 4. A mounting clamp 512 is fixedly connected to one side of the movable block 511. A second motor 513 is mounted at the front end of the mounting clamp 512. A rotating box 514 is rotatably connected to the inner side of the mounting clamp 512 via a rotating shaft. A third motor 515 is mounted on the inner side of the rotating box 514. The output shaft of the second motor 513 is fixedly connected to the rotating box 514. The output shaft of the third motor 515 is fixedly connected to the assembly plate 516. A first vision sensor 5114 is mounted at both the front and rear ends of the assembly plate 516. A flux tank is fixedly connected to the other side of the movable block 511.

[0024] Specifically, the moving block 511 is used to achieve vertical displacement along the first electric slide rail 4, the mounting plate 512 provides a rotation support base for the rotating box 514, the second motor 513 is used to drive the rotating box 514 to rotate 90 degrees to switch the working posture, the rotating box 514 is used to support the installation of the third motor 515, the third motor 515 is used to drive the assembly plate 516 to rotate 90 degrees to avoid motion interference, the assembly plate 516 provides an installation carrier for the internal sliding parts and the external mechanism, the first vision sensor 5114 is used to collect the spatial position data of the side stiffeners to achieve positioning calibration, and the flux tank is used to store the flux required for welding.

[0025] In this embodiment, cavities are provided on the adjacent sides of the two assembly plates 516. Two guide rods 517 are fixedly connected to the inner side of the assembly plate 516. An L-shaped slide rod 518 is slidably connected to the outer side of the two guide rods 517. The two L-shaped slide rods 518 are symmetrically arranged on the inner side of the assembly plate 516. A rack 519 is fixedly connected to the adjacent end of the two L-shaped slide rods 518. A second electric slide rail 5110 is installed at the distant end of the two L-shaped slide rods 518. A moving plate 5115 is provided on the outer side of the second electric slide rail 5110. A cylinder 5116 is installed on the other side of the moving plate 5115.

[0026] Specifically, the cavity of the assembly plate 516 provides movable installation space for the L-shaped slide bar 518, the guide rod 517 is used to slide and guide and limit the L-shaped slide bar 518, the L-shaped slide bar 518 is used to drive the second electric slide rail 5110 to move in opposite directions and form a rectangular limiting structure, the rack 519 is used to transmit gear power to drive the L-shaped slide bar 518 to slide, the second electric slide rail 5110 is used to drive the moving plate 5115 to move to adapt to the length of the side stiffener, the moving plate 5115 is used to support the installation cylinder 5116, and the cylinder 5116 is used to drive the mounting box 521 to extend and retract closer to the weld area.

[0027] In this embodiment, mounting brackets 5111 are fixedly connected to the sides of the two mounting plates 516 that are close to each other, and a first gear 5112 is rotatably connected to the sides of the two mounting brackets 5111 that are far apart from each other. The outer side of the first gear 5112 meshes with the rack 519. A fourth motor 5113 is installed on the sides of the two mounting brackets 5111 that are close to each other, and the output shaft of the fourth motor 5113 is fixedly connected to the first gear 5112.

[0028] Specifically, the mounting bracket 5111 is used to support the mounting of the first gear 5112 and the fourth motor 5113. The first gear 5112 is used to mesh with the rack 519 to realize power transmission. The fourth motor 5113 is used to provide rotational power for the first gear 5112, thereby driving the L-shaped slide rod 518 to slide in opposite directions to adapt to the side ribs of different widths.

[0029] In this embodiment, the output shaft of the cylinder 5116 is fixedly connected to the mounting box 521. The inner side of the mounting box 521 is fixedly connected to the first partition 522. The fifth motor 523 is installed on one side of the first partition 522. The other side of the fifth motor 523 is rotatably connected to the second gear 524. The outer side of the second gear 524 is meshed with two third gears 525. One end of the third gear 525 is rotatably connected to the first partition 522. The same position at the same end of the two third gears 525 is fixedly connected to the eccentric shaft 526. The outer sides of the two eccentric shafts 526 are rotatably connected to the rocking plate 527.

[0030] Specifically, the mounting box 521 provides protection and installation space for the internal transmission components. The first partition 522 is used to support and install the fifth motor 523 and each gear. The fifth motor 523 provides power to the gear transmission system. The second gear 524 is used to drive the two third gears 525 to rotate synchronously in opposite directions. The third gear 525 is used to drive the eccentric shaft 526 to rotate. The eccentric shaft 526 is used to drive the rocking plate 527 to move in an elliptical shape. The rocking plate 527 is used to push the spherical shell 5210 to achieve multi-angle attitude adjustment.

[0031] In this embodiment, a second partition 528 is fixedly connected to the inner side of the mounting box 521. A circular through hole is provided on the outer side of the second partition 528. A magnetic ring 529 is fixedly connected to one side of the second partition 528. A spherical shell 5210 is rotatably connected to the inner side of the magnetic ring 529. The spherical shell 5210 is made of magnetic metal. The other side of the second partition 528 is in contact with the rocking plate 527. One end of the second gear 524 is fixedly connected to the spherical shell 5210 through a universal coupling.

[0032] Specifically, the second partition 528 is used to support the installation of the magnetic ring 529, the magnetic ring 529 is used to magnetically position the spherical shell 5210 to prevent it from falling off, the spherical shell 5210 provides an installation base for welding the actuator, and the universal coupling is used to connect the second gear 524 and the spherical shell 5210, transmit power and adapt to the multi-angle deflection of the spherical shell 5210.

[0033] In this embodiment, a second vision sensor 5214 is installed on the outer side of the spherical shell 5210. The second vision sensor 5214 has a ring design. A first electric actuator 5211 is installed on the inner side of the spherical shell 5210. A welding head 5212 is provided on the output shaft of the first electric actuator 5211. A solenoid valve spray head 5213 is provided on the output shaft of the first electric actuator 5211 through a bracket. The input port of the solenoid valve spray head 5213 is fixedly connected to the flux tank through a hose.

[0034] Specifically, the second vision sensor 5214 is used to scan the weld position in real time to complete precise positioning, the first electric actuator 5211 is used to drive the welding head 5212 to extend and retract to adapt to the dimensional tolerance of the weldment, the welding head 5212 is used to perform welding operations on the side stiffeners and reinforcing ribs, the solenoid valve spray head 5213 is used for controlled spraying of flux, and the hose is used to connect the flux tank and the solenoid valve spray head 5213 to realize flux delivery.

[0035] In this embodiment, a support guide rail 611 is fixedly connected to the front end of the assembly plate 516. Two mutually symmetrical third electric slide rails 612 are installed on the upper end of the support guide rail 611. A sliding plate 613 is provided on the upper end of the two third electric slide rails 612. A fixing frame 614 is fixedly connected to the upper end of the sliding plate 613. A second electric push rod 615 is installed on the inner side of the fixing frame 614. A pressure sensor is provided on the inner side of the second electric push rod 615.

[0036] Specifically, the support rail 611 provides an installation base for the third electric slide rail 612. The third electric slide rail 612 is used to drive the sliding plate 613 to feed and achieve rib clamping. The sliding plate 613 is used to support the mounting bracket 614. The mounting bracket 614 is used to support the installation of the second electric push rod 615 and the guide component. The second electric push rod 615 provides extension and retraction power for the clamping mechanism. The pressure sensor is used to monitor the clamping force in real time to ensure the clamping fit.

[0037] In this embodiment, the output shaft of the second electric actuator 615 is rotatably connected to two cross-symmetrical first connecting rods 616 via a rotating shaft. The other end of the first connecting rod 616 is rotatably connected to a guide slide rod 617 via a rotating shaft. A guide sleeve 618 is slidably connected to the outside of the guide slide rod 617. The outside of the guide sleeve 618 is fixedly connected to the fixing frame 614 via a connecting rod. A second connecting rod 619 is fixedly connected to the same end of both guide slide rods 617.

[0038] Specifically, the first link 616 is used to transmit the power of the second electric push rod 615, the guide slide rod 617 slides in the guide sleeve 618 to achieve linear motion guidance, the guide sleeve 618 is used to limit the movement trajectory of the guide slide rod 617, and the second link 619 is used to connect the guide slide rod 617 and the L-shaped cavity rod 621 to transmit clamping power.

[0039] In this embodiment, an L-shaped hollow rod 621 is fixedly connected to the other side of the second connecting rod 619. A sixth motor 622 is installed on the outside of the L-shaped hollow rod 621. The output shaft of the sixth motor 622 is fixedly connected to a spring telescopic rod 623 through a coupling. A friction plate 624 is fixedly connected to the other end of the spring telescopic rod 623.

[0040] Specifically, the L-shaped hollow rod 621 is used to support the grinding assembly and clamp the corner of the rib plate, the sixth motor 622 provides rotational power for the grinding operation, the spring telescopic rod 623 is used for adaptive clamping to adapt to the vertical tolerance of the weldment, and the friction plate 624 is used to grind and chamfer the corner of the rib plate to remove burrs and avoid assembly scratches.

[0041] Working principle: During use, the wind turbine bearing housing base is placed vertically in the preset positioning area of ​​the dedicated workbench. The two side stiffeners, including the matching transverse arc-shaped reinforcing ribs, are first precisely pre-installed into the designated welding position through the assembly groove on the outside of the bearing housing, completing the initial positioning and limiting. By adjusting the slide rod of the gantry frame 1, the first motor 2 is moved to the position directly above the axis of the bearing housing. Then, the first motor 2 is started, and its output shaft drives the first electric slide rails 4 on both sides to deflect synchronously through the connecting frame 3. During this process, the first vision sensors 5114 at the front and rear ends of the assembly plate 516 and the ring-shaped second vision sensor 5214 on one side of the mounting box 521 work together to collect the spatial position data of the side stiffeners in real time. Through positioning calibration, the welding mechanism 5 of the two side stiffeners is made to form a relatively vertically aligned working posture with the two side stiffeners, ensuring the precise connection of subsequent actions. Start the second motor 513, and its output shaft drives the rotating box 514 to rotate 90 degrees, so that the rotating box 514 smoothly changes from the initial vertical downward state to the horizontal state. At this time, the side stiffener is in the working area between the two second electric slide rails 5110. Next, the fourth motor 5113 installed on the mounting bracket 5111 is started. Its output shaft drives the first gear 5112 to rotate. The first gear 5112 drives the upper and lower racks 519 to move in opposite directions through meshing transmission. The racks 519 synchronously drive the L-shaped slide rods 518 to slide smoothly in opposite directions on the inner side of the assembly plate 516 under the precise guidance of the guide rod 517. According to the actual width of the side rib, the two second electric slide rails 5110 are evenly attached to the two side walls of the side rib at their closest points. Then, the first electric slide rail 4 is started, driving the moving block 511 to move downward along the slide rail, causing the two second electric slide rails 5110 to synchronously attach to the front and rear ends of a single side rib. At this time, the two L-shaped slide rods 518 are in a symmetrical attachment state, forming a rectangular limiting structure, which precisely limits the minimum clamping range of the side rib and prevents movement during operation. Start the second electric slide rail 5110, drive the moving plate 5115 to move along the slide rail to the farthest travel position that matches the length of the side stiffener. According to the weld gap between the side stiffener and the bearing seat, control the output shaft of the cylinder 5116 to slowly extend, driving the welding assembly 52 to gradually approach the weld area. When the welding head 5212 lightly touches the outer wall of the bearing seat, stop the cylinder 5116. Then, the fifth motor 523 inside the mounting box 521 is activated, and its output shaft drives the second gear 524 to rotate. The second gear 524 meshes and drives two third gears 525 to rotate synchronously in opposite directions on one side of the first partition 522. The third gears 525 drive the rocking plate 527 to make a smooth elliptical movement through the eccentric shaft 526 at the end. During this process, the second gear 524 pulls the spherical shell 5210 synchronously through the universal coupling. Under the support of the second partition 528 and the magnetic positioning of the magnetic ring 529, the spherical shell 5210 realizes multi-angle movement adjustment. At the same time, the spherical shell 5210 drives the ring second vision sensor 5214 to scan the weld position in real time and accurately calibrate the alignment angle of the welding head 5212. Through the extension and retraction of the output shaft of the first electric push rod 5211, the welding head 5212 is driven to fit tightly against the weld surface to adapt to the dimensional tolerance of the weldment. After the adjustment is completed, all adjustment actions are stopped. The first electric slide rail 4 is activated, driving the two welding heads 5212 on both sides to weld the vertical weld between the side stiffener and the bearing seat at a uniform speed from top to bottom. When welding reaches the connection position between the side stiffener and the transverse reinforcing rib, the extension and retraction length of the first electric push rod 5211 and the deflection angle of the spherical shell 5210 are controlled to adapt to the changes in weld spacing and welding angle in real time, ensuring welding continuity. During the welding process, the solenoid valve spray head 5213 is activated simultaneously, drawing flux from the flux tank through a hose and spraying it evenly onto the area around the weld to be welded, effectively cleaning impurities and improving the welding fusion effect. Before starting the vertical weld, the second electric actuator 615 is activated in advance, and its output shaft extends slowly, driving the two cross-symmetrical first connecting rods 616 to rotate synchronously. The first connecting rods 616 drive the guide slide rod 617 to slide smoothly along the inner side of the guide sleeve 618 through the shaft transmission. As the guide slide rod 617 extends with the output shaft of the second electric actuator 615, it drives the second connecting rod 619 to move synchronously. Then, through the transmission of the first connecting rods 616, the L-shaped cavity rod 621 is gradually tightened until the distance between the two L-shaped cavity rods 621 is precisely matched with the included angle of the side stiffener. The two third electric slide rails 612 on the upper end of the support guide rail 611 are activated. The two third electric slide rails 612 work together to drive the sliding plate 613 to move smoothly towards the side stiffener. The sliding plate 613 drives the two L-shaped cavity rods 621 to move closer and clamp the side stiffener through the fixing frame 614. The pressure sensor inside the second electric push rod 615 monitors the clamping force in real time to ensure that the side stiffener is tightly attached to the outer wall of the bearing seat under the push of the sliding plate 613, thus completely avoiding the problems of dry welding and incomplete welding. During the downward welding process of the first electric slide rail 4 driving the side rib welding mechanism 5, the sixth motor 622 on the outside of the L-shaped cavity rod 621 is started simultaneously. Its output shaft drives the spring telescopic rod 623 to rotate through the coupling. The friction plate 624 at the other end of the spring telescopic rod 623 rotates accordingly, and the included angle part of the side rib is ground synchronously. When the friction plate 624 is in contact with the included angle surface, the spring telescopic rod 623 adaptively presses according to the actual contact situation, accurately adapts to the dimensional tolerance in the vertical direction, and ensures that the friction plate 624 is always in close contact with the included angle surface. The ground surface is smooth and burr-free, avoiding scratches on related parts during subsequent assembly. After the vertical weld is completed, the welding process for the horizontal arc-shaped reinforcing ribs begins. First, the first electric slide rail 4 is activated, causing the side rib welding mechanism 5 and clamping mechanism 6 to move upwards as a whole, maintaining a safe distance and offset from the already welded side ribs. Based on the outer diameter of the bearing housing, the retraction stroke of the side rib welding mechanism 5 and clamping mechanism 6 is adjusted to completely offset them from the horizontal reinforcing ribs, avoiding interference. Then, the third motor 515 inside the rotating box 514 is activated, its output shaft driving the assembly plate 516 to rotate 90 degrees, changing the assembly plate 516 from a horizontal to a vertical position. Simultaneously, the assembly plate 516 drives the clamping mechanism 6 to rotate to the rear end position of the mounting clamp 512, forming a spatially offset layout with the second motor 513, completely eliminating the risk of motion interference. At this time, the two second electric slide rails 5110 correspond to the weld seam areas at the upper and lower ends of the transverse reinforcing rib, respectively. The fourth motor 5113 is started again, driving the first gear 5112 to rotate. Through the transmission of the rack 519 and the L-shaped slide rod 518, the two mounting boxes 521 are precisely brought close to the weld seams at the upper and lower ends of the transverse reinforcing rib. Through the coordinated adjustment of the fifth motor 523, the spherical shell 5210 and the first electric push rod 5211, combined with the secondary positioning of the second vision sensor 5214, the welding head 5212 is made to fit tightly against the weld seam surface. At the same time, through the coordinated action of the second electric push rod 615, the first connecting rod 616 and other components of the adjustment assembly 61, the clamping angle and position of the L-shaped cavity rod 621 are adjusted, so that the two L-shaped cavity rods 621 form a close clamping fit against the transverse reinforcing rib. The pressure sensor monitors the clamping force in real time to ensure that the reinforcing rib and the bearing seat fit tightly. The first motor 2 is started, and its output shaft drives the first electric slide rail 4 to rotate smoothly 180 degrees through the connecting frame 3. The side stiffener welding mechanism 5 simultaneously completes the circumferential weld of the transverse stiffener. During this process, the friction plate 624 of the clamping mechanism 6 continuously grinds the angle position of the stiffener. The spring telescopic rod 623 adapts to the tolerance changes of the arc surface and always maintains a tight fit, ultimately achieving high-quality welding and angle grinding of the transverse stiffener, significantly improving the overall welding firmness and assembly adaptability.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for a bearing housing base of a wind turbine generator, comprising a gantry frame (1), characterized in that: The upper end of the slide bar of the gantry frame (1) is equipped with a first motor (2), and the output shaft of the first motor (2) is fixedly connected to a connecting frame (3). Both sides of the connecting frame (3) are equipped with first electric slide rails (4). The inner side of the first electric slide rail (4) is provided with a side stiffener welding mechanism (5). The side stiffener welding mechanism (5) includes a positioning component (51) for positioning. The positioning component (51) includes an assembly plate (516). The side stiffener welding mechanism (5) also includes a welding component (52) for adjusting the welding angle. The inner side of the side stiffener welding mechanism (5) is provided with a clamping mechanism (6). The clamping mechanism (6) includes an adjustment component (61) for positioning the side panel and the reinforcing rib. The clamping mechanism (6) includes a chamfering component (62) for chamfering.

2. The welding fixture for a bearing housing base of a wind turbine generator according to claim 1, characterized in that: The positioning component (51) includes a movable block (511) disposed inside the first electric slide rail (4). A mounting clamp (512) is fixedly connected to one side of the movable block (511). A second motor (513) is installed at the front end of the mounting clamp (512). A rotating box (514) is rotatably connected to the inner side of the mounting clamp (512) via a rotating shaft. A third motor (515) is installed on the inner side of the rotating box (514). The output shaft of the second motor (513) is fixedly connected to the rotating box (514). The output shaft of the third motor (515) is fixedly connected to the assembly plate (516). A first vision sensor (5114) is installed at both the front and rear ends of the assembly plate (516). A flux tank is fixedly connected to the other side of the movable block (511).

3. The welding fixture for a bearing housing base of a wind turbine generator according to claim 1, characterized in that: A cavity is provided on the adjacent side of each of the two assembly plates (516). Two guide rods (517) are fixedly connected to the inner side of the assembly plate (516). An L-shaped slide rod (518) is slidably connected to the outer side of the two guide rods (517). The two L-shaped slide rods (518) are symmetrically arranged on the inner side of the assembly plate (516). A rack (519) is fixedly connected to the adjacent end of each of the two L-shaped slide rods (518). A second electric slide rail (5110) is installed at the distant end of each of the two L-shaped slide rods (5110). A moving plate (5115) is provided on the outer side of the second electric slide rail (5110). A cylinder (5116) is installed on the other side of the moving plate (5115).

4. The welding fixture for a bearing housing base of a wind turbine generator according to claim 3, characterized in that: Mounting brackets (5111) are fixedly connected to the sides of the two mounting plates (516) that are close to each other, and first gears (5112) are rotatably connected to the sides of the two mounting brackets (5111) that are far apart from each other. The outer side of the first gear (5112) meshes with a rack (519). A fourth motor (5113) is installed on the sides of the two mounting brackets (5111) that are close to each other. The output shaft of the fourth motor (5113) is fixedly connected to the first gear (5112).

5. The welding fixture for a bearing housing base of a wind turbine generator according to claim 3, characterized in that: The output shaft of the cylinder (5116) is fixedly connected to a mounting box (521). A first partition (522) is fixedly connected to the inner side of the mounting box (521). A fifth motor (523) is installed on one side of the first partition (522). A second gear (524) is rotatably connected to the other side of the fifth motor (523). Two third gears (525) are meshed on the outer side of the second gear (524). One end of the third gear (525) is rotatably connected to the first partition (522). An eccentric shaft (526) is fixedly connected to the same position at the same end of the two third gears (525). A swaying plate (527) is rotatably connected to the outer side of the two eccentric shafts (526).

6. The welding fixture for a bearing housing base of a wind turbine generator according to claim 5, characterized in that: The inner side of the mounting box (521) is fixedly connected to a second partition (528). A circular through hole is opened on the outer side of the second partition (528). A magnetic ring (529) is fixedly connected to one side of the second partition (528). A spherical shell (5210) is rotatably connected to the inner side of the magnetic ring (529). The spherical shell (5210) is made of magnetic metal. The other side of the second partition (528) is in contact with the shaking plate (527). One end of the second gear (524) is fixedly connected to the spherical shell (5210) through a universal coupling.

7. The welding fixture for a bearing housing base of a wind turbine generator according to claim 6, characterized in that: A second vision sensor (5214) is installed on the outer side of the spherical shell (5210). The second vision sensor (5214) is a ring design. A first electric actuator (5211) is installed on the inner side of the spherical shell (5210). A welding head (5212) is provided on the output shaft of the first electric actuator (5211). A solenoid valve spray head (5213) is provided on the output shaft of the first electric actuator (5211) through a bracket. The input port of the solenoid valve spray head (5213) is fixedly connected to the flux tank through a hose.

8. The welding fixture for a bearing housing base of a wind turbine generator according to claim 1, characterized in that: The front end of the assembly plate (516) is fixedly connected to a support guide rail (611). Two mutually symmetrical third electric slide rails (612) are installed on the upper end of the support guide rail (611). The upper ends of the two third electric slide rails (612) are jointly provided with a sliding plate (613). The upper end of the sliding plate (613) is fixedly connected to a fixing frame (614). A second electric push rod (615) is installed on the inner side of the fixing frame (614). A pressure sensor is provided on the inner side of the second electric push rod (615).

9. The welding fixture for a bearing housing base of a wind turbine generator according to claim 8, characterized in that: The output shaft of the second electric actuator (615) is rotatably connected to two cross-symmetrical first connecting rods (616) via a rotating shaft. The other end of the first connecting rod (616) is rotatably connected to a guide slide rod (617) via a rotating shaft. A guide sleeve (618) is slidably connected to the outside of the guide slide rod (617). The outside of the guide sleeve (618) is fixedly connected to the fixing frame (614) via a connecting rod. A second connecting rod (619) is fixedly connected to the same end of both guide slide rods (617).

10. The welding fixture for a bearing housing base of a wind turbine generator according to claim 9, characterized in that: An L-shaped hollow rod (621) is fixedly connected to the other side of the second connecting rod (619). A sixth motor (622) is installed on the outside of the L-shaped hollow rod (621). The output shaft of the sixth motor (622) is fixedly connected to a spring telescopic rod (623) through a coupling. A friction plate (624) is fixedly connected to the other end of the spring telescopic rod (623).

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