Steel box girder adaptive positioning and welding device

Abstract

This invention relates to the field of steel box girder processing technology and discloses an adaptive positioning and welding device for steel box girders. The device includes a base, a bottom plate on the upper side of the base, a web plate on the upper side of the bottom plate, and a gantry frame sliding on the ground on both sides of the base. An adaptive adjustment assembly is provided on the outer wall of the web plate. The adaptive adjustment assembly includes clamping blocks that fit snugly against both sides of the web plate. A cylinder is fixed to the outer wall of the gantry frame, with its output end connected to the outer wall of the clamping blocks. A second clamping block, sliding on the inner wall of a guide block, is fixed to the output end of the cylinder. By moving the two clamping blocks one in a centered position, support is provided for the web plate. Through the automatic adaptation of the guide block's position and angle with the web plate during its downward movement, and by fixing the web plate with the clamping blocks two, the device achieves the function of raising the web plate and aligning it with the marking line, thereby significantly reducing the amount of manual positioning and adjustment work.

Description

Technical Field

[0001] This invention relates to the field of steel box girder processing technology, specifically to an adaptive positioning welding device for steel box girders. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with large spans and are called steel box girders because their shape resembles a box. They are composed of components such as a top plate, bottom plate, web plate, transverse diaphragms, longitudinal diaphragms, and stiffening ribs. During the fabrication of steel box girders, a fully welded process is usually used to form an integral structure.

[0003] A search revealed Chinese Patent Publication No. CN119794700B, which discloses a steel box girder welding positioning device. The device includes a fixing assembly fixed to a base plate and a positioning assembly connected to the web plate. The positioning assembly includes a receiving plate slidably mounted on the fixing assembly, and a positioning component for positioning the web plate from front to back. The positioning component includes a clamping plate and a clamping plate, which are slidably mounted on the receiving plate to clamp the web plate. A rack is provided on the clamping plate and the clamping plate. A guide gear that engages with the rack is provided on the receiving plate. A guide rod is slidably mounted on the receiving plate, passing through the guide gear and threadedly engaging with it. A baffle is provided at the end of the guide rod. A limit plate is provided on the fixing assembly, and an adjustment assembly for adjusting the distance between the web plate and the base plate is provided on the fixing assembly. This steel box girder welding positioning device improves welding quality.

[0004] However, the following problems still exist with this solution: First, the structure is complex and the disassembly and assembly process is cumbersome, which makes it time-consuming in actual use. In addition, when hoisting the web plate in the early stage, the position and tilt angle of the web plate must be strictly controlled, which results in low web plate installation efficiency. Second, the welding difficulty is increased near the two sides of the web plate due to the obstruction of the structure. Summary of the Invention

[0005] To address the shortcomings of existing technologies and solve the aforementioned technical problems, this invention provides an adaptive positioning and welding device for steel box girders.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a steel box girder adaptive positioning welding device, including a base, a bottom plate provided on the upper side of the base, a web plate provided on the upper side of the bottom plate, a gantry frame that slides on the ground on both sides of the base, and an adaptive adjustment component provided on the outer wall of the web plate; The adaptive adjustment component includes clamping blocks 1 fitted to both sides of the web plate. A cylinder 1 with its output end connected to the outer wall of the clamping block 1 is fixed to the outer wall of the gantry frame. A cylinder 2 is slidably mounted on the top inner wall of the gantry frame. A clamping seat is fixedly mounted on the output end of the cylinder 2. A slider 1 is slidably mounted on the inner wall of the clamping seat. A guide block is rotatably connected to the lower side of the slider 1. Hydraulic cylinders 2 are mounted on both outer walls of the guide block. A clamping block 2 that slides on the inner wall of the guide block is fixedly mounted on the output end of the hydraulic cylinder 2. The outer wall of the clamping block 2 is tightly fitted to the outer wall of the web plate. An outwardly expanding U-shaped groove 1 is opened on the side of the guide block and the clamping block 1 facing the web plate.

[0007] The above technical solution involves two clamping blocks working together to allow the guide block to move downwards and automatically adapt to the position and angle of the web plate. Then, the web plate is fixed by the cooperation of the hydraulic cylinder and clamping block. Subsequently, the web plate is automatically centered and aligned with the marking line by the centering movement of the two clamping blocks. With the cooperation of the welding robot arm, the welding between the web plate and the base plate is completed. This achieves the functions of transporting, lifting, and aligning the web plate with the marking line, thereby significantly reducing the amount of manual positioning and adjustment work.

[0008] Preferably, a baffle is fixed to the front side of the base, and the outer wall of the baffle is fitted to the front side of the base plate.

[0009] Preferably, both sides of the base plate are fitted with limiting plates fixed to the outer wall of the baffle, and the opposite sides of the two limiting plates are both curved.

[0010] Preferably, each of the two cylinders is fixedly provided with a limiting support block that fits against both sides of the base. A U-shaped groove is provided on one side of the two limiting support blocks opposite to each other, which cooperates with the base plate. The lower side of the clamping block is fixed to the upper side of the limiting support block. A limiting slider slides on the inner wall of the limiting support block. A spring is fixed between the outer wall of the limiting slider and the inner wall of the limiting support block. Pressure sensors are installed between the two side walls of the clamping block.

[0011] Preferably, a plurality of rollers are rotatably mounted between the side walls of the base, and the lower side of the base plate slides on the outer wall of the plurality of rollers.

[0012] Preferably, a plurality of rollers are provided between the two side walls of the base, and the rollers are alternately distributed. A hydraulic cylinder is provided on the inner bottom wall of the base, and the output end of the hydraulic cylinder is fixedly provided on the lower side of the rollers.

[0013] Preferably, the outer wall of the baffle is provided with an electromagnet, which is used to magnetically attract and fix it to the front side of the base plate.

[0014] Preferably, the inner wall of the gantry is slidably connected to a slider two for providing support for the cylinder two, and spring two is fixed between both sides of the slider two and the inner wall of the gantry.

[0015] Preferably, the front and rear sides of the upper surface of the guide block are inclined, and the lower side of the gantry frame is provided with a storage groove that matches the clamp and the outer wall of the guide block.

[0016] Preferably, a guide rod is fixed to the upper side of the guide block, and a guide hole is provided on the inner bottom wall of the gantry frame to slide with the guide rod, and the lower side of the guide hole is tapered.

[0017] This invention provides an adaptive positioning welding device for steel box girders. It has the following beneficial effects: 1. This invention supports the web plate by moving two clamping blocks one in the center, and automatically adapts the guide block to the position and angle of the web plate during the downward movement, and fixes the web plate by clamping block two, thereby realizing the functions of transporting, lifting and aligning the marking line of the web plate, thus greatly reducing the amount of manual positioning and adjustment work.

[0018] 2. The present invention enables the gantry frame to center the bottom plate held by clamping block one from left to right by cooperating roller one and move it between the two limiting support blocks and be fixed by electromagnet, thereby realizing the rapid and efficient feeding of the bottom plate.

[0019] 3. After the web plate is welded once, the present invention drives the guide block to move upward by the output end of the cylinder two, so that the guide hole slides into the guide rod. The outer wall of the guide block and the inner wall of the receiving groove cooperate, thereby realizing the limiting of the guide block during the movement of the gantry frame, which helps to improve the service life of the device. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the gantry structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial cross-sectional schematic diagram of the gantry frame of the present invention; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 for Figure 4 Enlarged view of point C in the middle; Figure 7 This is a schematic diagram of the first and second stage clamping of the clamping block according to the present invention; Figure 8 This is a schematic diagram of the interior of the base of the present invention; Figure 9 This is a top view of the gantry frame of the present invention; Figure 10 This is a schematic cross-sectional view of the gantry frame of the present invention.

[0021] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0022] Among them, 1. base; 100. baffle; 101. electromagnet; 102. limiting plate; 103. roller one; 104. roller two; 105. hydraulic cylinder one; 2. Base plate; 3. Web plate; 4. Gantry frame; 5. Adaptive adjustment component; 50. Clamping block one; 51. Limiting slider; 52. Limiting support block; 53. Pressure sensor; 54. Hydraulic cylinder two; 55. Clamping seat; 56. Clamping block two; 57. Guide block; 58. Slider one; 59. Slider two; 6. Controller; 7. Welding robot arm; 8. Ground rail; 9. Cylinder 1; 10. Slide rod 1; 11. Cylinder 2; 12. Slide rod 2; 13. Spring 1; 14. L-shaped support plate; 15. Slide rod 3; 16. Slide groove 1; 17. Spring 2; 18. Guide hole; 19. Guide rod; 20. Storage slot. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1, please refer to the appendix. Figure 1 - Appendix Figure 7 This invention provides an adaptive positioning welding device for steel box girders, which includes a controller 6, a welding robot arm 7, and a ground rail 8 fixed on the ground. The gantry 4 is driven by a servo motor, cooperates with the high-precision linear ground rail 8, and adopts the closed-loop technology of grating ruler to achieve precise movement of the gantry 4 in the front and back directions. With the controller 6 preset program, it can be precisely moved to the position marked on the bottom plate 2 where the web plate 3 to be welded is located. Both sides of the guide block 57 are fixed with L-shaped support plates 14, and the hydraulic cylinder 2 54 is set on the inner wall of the L-shaped support plate 14. All of the above are existing technologies. An adaptive positioning welding device for steel box girders includes a base 1, a bottom plate 2 on the upper side of the base 1, a web plate 3 on the upper side of the bottom plate 2, a gantry frame 4 that slides on the ground on both sides of the base 1, and an adaptive adjustment component 5 on the outer wall of the web plate 3. The adaptive adjustment component 5 includes clamping blocks 50 that fit snugly on both sides of the web plate 3. A cylinder 9 with its output end connected to the outer wall of clamping block 50 is fixed to the outer wall of the gantry frame 4. A cylinder 11 slides on the inner wall of the top of the gantry frame 4. A clamping seat 55 is fixedly installed at the output end of cylinder 11. A slider 58 slides on the inner wall of clamping seat 55. A guide block 57 is rotatably connected to the lower side of slider 58. Hydraulic cylinders 54 are installed on both outer walls of the guide block 57. A clamping block 56 that slides on the inner wall of the guide block 57 is fixedly installed at the output end of the hydraulic cylinder 54. The outer wall of clamping block 56 is tightly fitted to the outer wall of the web plate 3. An outwardly expanding U-shaped groove is opened on the side of the guide block 57 and clamping block 50 facing the web plate 3.

[0025] Specifically, the bottom of the outwardly expanding U-shaped groove away from the web plate 3 is a plane that mates with the outer wall of the web plate 3. In use, the bottom plate 2 is placed on the base 1, and a mark is made on the base 1. Then the web plate 3 is hoisted or placed on the marked position on the base 1. At this time, the web plate 3 is in a rough placement state, that is, it is roughly aligned with the marked position, with an angle between it and the marked line, and there is a difference in the distance between the left and right sides of the base 1. By inputting the coordinates of the marking line into the controller 6, the gantry 4 is controlled to move and align with the marking position. Then, through the drive of the output end of the cylinder 9, the clamping blocks 50 are driven to move a certain distance, so that the outer inner wall of the outwardly expanding U-shaped grooves on the two clamping blocks 50 fits against the left and right side walls of the web plate 3. At this time, since the web plate 3 is in a rough state, the diagonal outer walls of the two outwardly expanding U-shaped grooves fit against the side walls of the web plate 3, thereby limiting the web plate 3 and preventing the web plate 3 from tipping over during the processing. Next, the controller 6 controls the cylinder 11 to drive the clamp 55 to move down, so that the slider 58 and the guide block 57 move down synchronously. During the downward movement of the guide block 57, the outer inner wall of the outer U-shaped groove on its lower side slides against the upper side of the web 3. The outer wall of the web 3 presses against the guide block 57, and through the sliding connection between the slider 58 and the clamp 55, the guide block 57 drives the slider 58 and the clamp 55 to slide back and forth relative to each other, adapting to the front and back misalignment of the web 3 and the marking line. Through the rotational connection between the guide block 57 and the slider 58, the guide block 57 rotates and adapts to the angle between the web 3 and the marking line until the top of the web 3 and the inner top wall of the outer U-shaped groove of the guide block 57 are completely in contact, thus completing the limit of the upper part of the web 3 by the guide block 57. Then, the controller 6 controls the hydraulic cylinders 54 on the front and rear sides of the web plate 3 to drive the two clamping blocks 56 to squeeze the front and rear sides of the web plate 3 respectively and apply a preset force to fix the web plate 3. Then, through the drive of the output end of the cylinder 11, the web plate 3 is moved up to a preset distance to expose the weld between the web plate 3 and the bottom plate 2. Then, through the drive of the cylinder 9, the two clamping blocks 50 move towards the web plate 3 again for two remaining distances until the total distance moved by the two clamping blocks 50 towards the web plate 3 is equal, and the left and right sides of the web plate 3 slide into the outwardly expanding U-shaped groove on the clamping block 50. During this process, the compression of the left and right sides of the web plate 3 by the inner wall of the outwardly expanding U-shaped groove on the clamping block 50 causes the web plate 3 to rotate. Through the left and right sliding of the cylinder 11 and the gantry 4, the axis of the web plate 3 and the bottom plate 2 are aligned in the center, completing the alignment of the web plate 3 with the marking line. Next, under the control of the controller 6, the two welding robotic arms 7 perform synchronous welding on the front and back sides of the weld, thereby realizing the device's function of adaptively adjusting the position of the web plate 3 and automatic welding. In this embodiment, another usage method is to place several web plates 3 on the base 1, control the included angle between the web plates 3 and the mark within a preset range, and match the size of the opening of the outward-expanding U-shaped groove. Then, the controller 6 controls the gantry 4 to move to the position of the web plates 3. Repeat the above steps to raise the web plates 3, center both sides, and make the included angle with the mark line 0. Then, the gantry 4 moves the clamped web plates 3 to the position of the mark line for direct welding operation, thereby realizing the hoisting function of the web plates 3 and further improving the installation efficiency of the web plates 3.

[0026] Please see the appendix Figure 1 and attached Figure 8 A baffle 100 is fixed to the front side of the base 1. The outer wall of the baffle 100 is fitted to the front side of the base plate 2. Limiting plates 102 are fixed to the outer wall of the baffle 100 on both sides of the base plate 2. The opposite side of the two limiting plates 102 is curved.

[0027] Specifically, when placing the base plate 2, the front side of the base plate 2 can be limited by the baffle 100 to determine the coordinates of the marked line on the base plate 2. The outer arc surface of the limiting plate 102 makes it easier for the base plate 2 to slide between the two limiting plates 102 when hoisting it, and limits the left and right sides of the base plate 2, thereby helping to achieve efficient placement of the base plate 2.

[0028] Please see the appendix Figure 2 - Appendix Figure 7Both cylinders 9 have fixed limit support blocks 52 that fit against both sides of the base 1 at their output ends. The two limit support blocks 52 have a U-shaped groove 2 that fits with the base plate 2 on one side opposite to each other. The lower side of the clamping block 50 is fixed to the upper side of the limit support block 52. The inner wall of the limit support block 52 has a sliding limit slider 51. A spring 13 is fixed between the outer wall of the limit slider 51 and the inner wall of the limit support block 52. Pressure sensors 53 are installed between the two side walls of the clamping block 50.

[0029] Specifically, the clamping block 50 has a notch near the lower part of the base plate 2, so that when the web plate 3 is fully inserted into the outer U-shaped groove, it does not obstruct the welding of the web plate 3 and the base plate 2; the pressure sensor 53 is a thin-film pressure sensor; the spring 13 has a sliding rod 12 inside, one end of which is fixed to the inner wall of the limiting support block 52, and its outer wall slides through the left and right sides of the limiting slider 51, and its other end has a preset gap with the outer wall of the base 1, which is used to provide guidance and support for the extension and retraction of the spring 13 and the sliding of the limiting slider 51; multiple sliding rods 10 are fixed on the left and right inner walls of the gantry frame 4, and the outer walls of the sliding rods 10 slide through the two sides of the limiting support block 52, providing guidance and support for the left and right sliding of the limiting support block 52; When cylinder 9 drives the limiting support block 52 to move the clamping block 50 a certain distance, the outer inner wall of the outwardly expanding U-shaped groove on the clamping block 50 is in contact with the outer wall of the web plate 3. The pressure signal is transmitted to the controller 6 in real time through the pressure sensor 53, so the controller 6 controls cylinder 9 to stop driving. At this time, since the web plate 3 is not in the center position relative to the bottom plate 2, the distance traveled by the two limiting support blocks 52 is not equal. At this time, with the cooperation of spring 13, the limiting slider 51 is pushed to slide out of the limiting support block 52, so that the left and right sides of the bottom plate 2 are both located in the U-shaped groove 2. Thus, the bottom plate 2 can form a support for the limiting support block 52 through the U-shaped groove 2, thereby forming a support for the clamping block 50 and preventing the web plate 3 from tilting in the front and back directions. When the web plate 3 is raised, the limit support block 52 moves the clamping block 50 forward by the drive of the cylinder 9. At this time, the web plate 3 is completely inserted into the U-shaped groove 1 on the clamping block 50, and the bottom plate 2 is inserted into the U-shaped groove 2, which helps to improve the safety when welding the web plate 3.

[0030] Example 2: Based on the above examples, there is a problem that hoisting the base plate 2 takes a long time. This example proposes the following solution to address this problem. Please refer to the appendix. Figure 1 and attached Figure 8A plurality of rollers 103 rotate between the side walls of the base 1. The lower side of the base plate 2 slides on the outer wall of the rollers 103. A plurality of rollers 2 104 are arranged between the two side walls of the base 1. The rollers 2 104 are alternately distributed. A hydraulic cylinder 105 is provided on the inner bottom wall of the base 1. The output end of the hydraulic cylinder 105 is fixedly arranged on the lower side of the rollers 2 104. An electromagnet 101 is provided on the outer wall of the baffle 100. The electromagnet 101 is used to magnetically attract and fix the front side of the base plate 2.

[0031] Specifically, the two ends of the roller 104 are rotatably connected to the support, while the output end of the hydraulic cylinder 105 is fixed to the lower side of the support. The left and right sides of the support slide on the side walls of the base 1. Based on the above embodiment, it is necessary to continuously adjust the position of the base plate 2 when hoisting it. However, due to safety requirements, the hoisted object cannot be held by hand during the hoisting operation. Therefore, it is necessary to continuously adjust the position of the base plate 2 through the extension tool so that it can be accurately placed on the base 1, which is quite cumbersome. Therefore, when hoisting the base plate 2, it is only necessary to hoist the main body of the base plate 2 onto the base 1, ensuring that the front side of the base plate 2 does not enter between the two limiting plates 102. Then, the gantry frame 4 slides into the front side of the base plate 2. Driven by the output end of the cylinder 9, the two limiting support blocks 52 clamp the left and right sides of the base plate 2. During this process, through the synchronous drive of the two cylinders 9, the two limiting support blocks 52 are aligned and move synchronously at the same distance, thereby causing the base plate 2 to roll on multiple rollers 103, thus completing the alignment of the base plate 2 in the left and right directions. Then, the hoisting of the base plate 2 is released. Driven by the output ends of multiple hydraulic cylinders 105, multiple supports and multiple rollers 104 are moved upward synchronously, lifting the base plate 2 to a preset height. Through the movement of the gantry 4, the base plate 2 is moved forward to between the two limit plates 102. Then, with the cooperation of the electromagnet 101, the front side of the base plate 2 is fixed. Then, the hydraulic cylinders 105 drive the rollers 104 to reset, and the base plate 2 is supported by multiple rollers 103, thus realizing the rapid and accurate loading of the base plate 2.

[0032] Based on the above embodiments, during the completion of one welding of web 3, because the web 3 needs to be centered in the left and right directions, the cylinder 11 cannot be reset after welding, affecting the next welding. This embodiment proposes the following solution to solve the above problem. Please refer to the appendix. Figure 1 Appendix Figure 4 and attached Figure 5 The inner wall of the gantry frame 4 is slidably connected to a slider 59 for providing support for cylinder 11. Springs 17 are fixed between both sides of the slider 59 and the inner wall of the gantry frame 4.

[0033] Specifically, a slide bar 15 is fitted inside the spring 2 17. One end of the slide bar 15 is fixed to the outer wall of the slider 2 59, while the inner wall of the gantry 4 is provided with a groove 16 that cooperates with the slide bar 15 to slide, so that the slide bar 15 can provide guidance and support for the sliding of the slider 2 59 and the extension and retraction of the spring 2 17. When the two clamping blocks 50 are moved to center the web plate 3, the slider 59, along with the cylinder 11 and guide block 57, slides horizontally against the elastic potential energy of the spring 17. After one welding of the web plate 3 is completed, the clamping block 56 releases its pressure on the web plate 3. Under the reset of the spring 17, the slider 59 and cylinder 11 move and reset, thereby reducing the impact on the next welding of the web plate 3.

[0034] Based on the above embodiment, when performing the next welding operation, the gantry 4 needs to move back and forth. However, due to the back-and-forth sliding of the clamp 55 and the slider 58, the guide block 57 may deviate due to inertia, making it impossible to align with the marking line. After prolonged use, the potential energy of the two springs 17 decreases to varying degrees, which can prevent the guide block 57 from sliding smoothly into the receiving groove 20, affecting welding efficiency. This embodiment proposes the following solution to address the above problems. Please refer to the appendix. Figure 5 Appendix Figure 9 and attached Figure 10 The front and rear sides of the upper surface of the guide block 57 are inclined. The lower side of the gantry 4 is provided with a storage groove 20 that matches the clamp 55 and the outer wall of the guide block 57. The upper side of the guide block 57 is fixed with a guide rod 19. The inner bottom wall of the gantry 4 is provided with a guide hole 18 that slides with the guide rod 19. The lower side of the guide hole 18 is tapered.

[0035] Specifically, after the welding of the web plate 3 is completed, the guide block 57 is centered in the left and right direction with the cooperation of the spring 17. At this time, the web plate 3 itself is aligned with the marking line, so that the guide block 57 is also centered in the front and back direction. Therefore, at this time, the guide block 57 is driven upward by the cylinder 2 11, and the inclined surfaces on the upper sides of its front and rear sides allow the clamp 55 and the guide block 57 to slide into the storage groove 20 and fit against the inner wall of the storage groove 20, so that the guide block 57 will not shake or deviate during the back-and-forth movement of the gantry 4. During this process, when the second spring 17 cannot center the second cylinder 11, the guide block 57 moves upward with the guide rod 19 through the tapered opening on the lower side of the guide hole 18 and the tapered setting on the upper end of the guide rod 19, and inserts into the lower inner wall of the guide hole 18. Guided by its inner wall, the guide rod 19 is slid in, which in turn provides guidance for the subsequent sliding of the guide block 57 into the storage groove 20, and also avoids the shaking of the second cylinder 11 during the movement, thereby helping to improve the service life of the device.

[0036] Work process: When in use, the main body of the base plate 2 is hoisted onto the base 1, and then the gantry frame 4 slides into the front side of the base plate 2. Through the synchronous drive of the output ends of the two cylinders 9 and the cooperation of multiple rollers 103, the two limit support blocks 52 clamp the base plate 2 in a left-right center position. Then, the hoisting of the base plate 2 is released. Through the drive of the output end of multiple hydraulic cylinders 105, multiple rollers 104 are driven to lift the base plate 2. Through the movement of the gantry frame 4, the base plate 2 is moved forward to the space between the two limit plates 102. Then, through the cooperation of the electromagnet 101, the front side of the base plate 2 is fixed, so as to realize the rapid and accurate loading of the base plate 2. Next, multiple web plates 3 are hoisted to the marked positions on the bottom plate 2. By inputting the coordinates of the marked lines into the controller 6, the gantry 4 is controlled to move and align with the marked positions, and the outer inner walls of the outwardly expanding U-shaped grooves on the two clamping blocks 50 are made to fit against the left and right side walls of the web plates 3, thereby limiting the web plates 3 and preventing them from tipping over during processing. Driven by cylinder 211, the guide block 57 is moved down and adapted to the position of the web plate 3. Then, the hydraulic cylinders 254 on the front and rear sides of the web plate 3 are driven synchronously to fix the web plate 3 with the two clamping blocks 256. Then, driven by the output end of cylinder 211, the web plate 3 is moved up to the preset distance to expose the weld between the web plate 3 and the bottom plate 2. The two clamping blocks 150 move the remaining distance to the web plate 3 again until the total distance moved by the two clamping blocks 150 to the web plate 3 is equal, so that the web plate 3 rotates and moves horizontally to achieve centering in the left and right directions and alignment with the marking line. Subsequently, under the control of the controller 6, the two welding robotic arms 7 perform synchronous welding on the front and back sides of the weld, thereby realizing the device's function of adaptively adjusting the position of the web plate 3 and automatic welding. After welding is completed, the guide block 57 is driven upward by the output end of cylinder 2 11. Through the cooperation of guide hole 18 and guide rod 19, the storage groove 20 completes the storage of guide block 57 and limits cylinder 2 11.

[0037] 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 steel box girder adaptive positioning and welding device, comprising a base (1), the upper side of the base (1) is provided with a bottom plate (2), the upper side of the bottom plate (2) is provided with a web plate (3), characterized in that, The base (1) is supported on both sides by a gantry frame (4) that slides on the ground, and the outer wall of the web (3) is provided with an adaptive adjustment component (5). The adaptive adjustment component (5) includes clamping blocks (50) fitted to both sides of the web (3), cylinder (9) with its output end connected to the outer wall of clamping block (50) fixed on the outer wall of the gantry (4), cylinder (11) sliding on the top inner wall of the gantry (4), clamping seat (55) fixedly provided on the output end of cylinder (11), slider (58) sliding on the inner wall of clamping seat (55), guide block (57) rotatably connected to the lower side of slider (58), hydraulic cylinder (54) provided on both outer walls of guide block (57), clamping block (56) sliding on the inner wall of guide block (57) fixedly provided on the output end of hydraulic cylinder (54), clamping block (56) tightly fitted to the outer wall of web (3), and an outwardly expanding U-shaped groove provided on the side of guide block (57) and clamping block (50) facing web (3).

2. The self-adapting positioning and welding device for steel box girder according to claim 1, characterized in that, A baffle (100) is fixed to the front side of the base (1), and the outer wall of the baffle (100) is fitted to the front side of the base plate (2).

3. The self-adaptive positioning and welding device for steel box girders according to claim 2, characterized in that, Both sides of the base plate (2) are fitted with limiting plates (102) fixed to the outer wall of the baffle (100), and the opposite sides of the two limiting plates (102) are both curved.

4. The adaptive positioning and welding device for steel box girders according to claim 1, characterized in that, Both cylinders (9) are fixedly provided with limiting support blocks (52) that fit against both sides of the base (1). On the opposite side of the two limiting support blocks (52), there is a U-shaped groove that fits with the base plate (2). The lower side of the clamping block (50) is fixed to the upper side of the limiting support block (52). The inner wall of the limiting support block (52) is slidably fitted with a limiting slider (51). A spring (13) is fixed between the outer wall of the limiting slider (51) and the inner wall of the limiting support block (52). Pressure sensors (53) are installed between the two side walls of the clamping block (50).

5. The adaptive positioning and welding device for steel box girders according to claim 1, characterized in that, A plurality of rollers (103) rotate between the side walls of the base (1), and the lower side of the base plate (2) slides on the outer wall of the plurality of rollers (103).

6. The self-adaptive positioning and welding device for steel box girders according to claim 5, characterized in that, A plurality of rollers (104) are provided between the two side walls of the base (1). Rollers (103) and rollers (104) are alternately distributed. A hydraulic cylinder (105) is provided on the inner bottom wall of the base (1). The output end of the hydraulic cylinder (105) is fixedly provided on the lower side of the rollers (104).

7. The adaptive positioning and welding device for steel box girders according to claim 2, characterized in that, An electromagnet (101) is provided on the outer wall of the baffle (100), and the electromagnet (101) is used to magnetically attract and fix the front side of the base plate (2).

8. The adaptive positioning and welding device for steel box girders according to claim 1, characterized in that, The inner wall of the gantry (4) is slidably connected to a slider two (59) for providing support for cylinder two (11), and spring two (17) is fixed between both sides of the slider two (59) and the inner wall of the gantry (4).

9. The self-adaptive positioning and welding device for steel box girders according to claim 1, characterized in that, The front and rear sides of the upper surface of the guide block (57) are set with slopes, and the lower side of the gantry frame (4) is provided with a storage groove (20) that matches the outer wall of the clamp (55) and the guide block (57).

10. The self-adaptive positioning and welding device for steel box girders according to claim 9, characterized in that, The upper side of the guide block (57) is fixed with a guide rod (19), and the inner bottom wall of the gantry (4) is provided with a guide hole (18) that slides with the guide rod (19). The lower side of the guide hole (18) is tapered.

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