Positioning tool for welding landscape bridge and welding method thereof

Abstract

This invention discloses a positioning fixture and welding method for welding landscape bridges, mainly relating to the technical field of welding devices. It includes a first base plate and a second base plate, each with several L-shaped blocks. A first sliding rod is slidably connected to each L-shaped block, and several arc-shaped plates are provided at the ends of the first sliding rods. A first spring is provided between the arc-shaped plates and the L-shaped blocks. It also includes fixing plates symmetrically arranged at both ends of the first base plate and used in conjunction with the second base plate. A first sliding plate and a second sliding plate are slidably connected to the first and second base plates, respectively. The first and second sliding plates are slidably connected, and a first welding torch is mounted on the first sliding plate. Furthermore, it includes a third sliding plate detachably connected to the first sliding plate, and a second welding torch is mounted on the third sliding plate. The beneficial effects of this invention are: solving the problem of low on-site construction efficiency in existing landscape bridge welding, improving the efficiency and quality of landscape bridge welding, and reducing the labor intensity of workers.

Description

Technical Field

[0001] This invention relates to the technical field of welding equipment, specifically a positioning fixture for welding landscape bridges and its welding method. Background Technology

[0002] As a fusion of urban municipal engineering and landscape engineering, landscape bridges must not only meet the basic functional requirements of bridge structure, such as mechanical load-bearing capacity and traffic safety, but also take into account the landscape design requirements of aesthetic appeal and compatibility with the surrounding environment. Their structural design and construction processes have higher requirements for personalization and refinement compared to conventional traffic bridges. The arch-beam joint is the core load-bearing node of a landscape bridge. This part needs to effectively transfer the axial force and bending moment of the arch rib to the main beam structure. The structural form is often customized according to the landscape design requirements, often featuring irregular connections and variable cross-section transitions. Furthermore, the dense arrangement of welds and stringent welding quality requirements directly determine the structural stability and service life of the entire bridge.

[0003] To reduce on-site construction time and avoid transporting oversized or overweight structures, landscape bridges are typically disassembled into main beams and arch beams at the factory, and then welded together on-site. This shortens the construction period and improves the manufacturing quality of the landscape bridge.

[0004] However, due to the irregular structural design of this section, the complex spatial operating angles, and the additional requirements for the flatness of the joint appearance and the aesthetics of the weld formation in the construction of the landscape bridge, it is difficult to use automated and mechanized welding equipment for standardized operations. Currently, the mainstream construction method is still manual welding. Although manual welding can adapt to the irregular structure and spatial construction requirements of the arch-beam joint section, and can adapt to welding operations in different positions by manually adjusting the welding angle and welding rod operation, this construction method is highly dependent on the professional skills and experience of the operators. Moreover, the welding speed and work efficiency of a single weld are limited by the intensity and proficiency of manual operation, resulting in a long overall construction cycle. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning fixture and welding method for welding landscape bridges, enabling automated welding of the main beam and arch beam of the landscape bridge, as well as the arch beam and the arch beam, solving the problem of low on-site construction efficiency in existing landscape bridge welding, improving the efficiency and quality of landscape bridge welding, and reducing the labor intensity of workers.

[0006] To achieve the above objectives, the invention employs the following technical solution: A positioning fixture for welding landscape bridges includes a welding mechanism that works in conjunction with a main beam and an arch beam. The arch beam includes several rigid vertical beams and connecting plates that connect the bottom of the rigid vertical beams to the main beam. Positioning pins that mate with adjacent rigid vertical beams and connecting plates are provided on the rigid vertical beams and the main beam, respectively. The welding mechanism includes a first base plate and a second base plate. Several L-shaped blocks are provided on both the first and second base plates. A first sliding rod is slidably connected to each L-shaped block. Several arc-shaped plates that contact the main beam or arch beam are provided at the ends of the first sliding rods. A first spring is provided between the arc-shaped plates and the L-shaped blocks. It also includes fixing plates symmetrically arranged at both ends of the first base plate, and a first fixing pin and a second fixing pin arranged on the first base plate and the second base plate. One end of the fixing plate is provided with an adjustment hole for the first fixing pin to pass through, and the other end of the fixing plate is provided with several through holes for the second fixing pin to pass through. A first eccentric wheel that contacts the first fixing pin is rotatably connected to the fixing plate. A first sliding plate and a second sliding plate are slidably connected to the first base plate and the second base plate respectively. The first sliding plate and the second sliding plate are slidably connected. A first mounting bracket is slidably connected to the first sliding plate. A first welding gun is provided on the first mounting bracket. It also includes a third slide plate detachably connected to the first slide plate, a fourth slide plate slidably connected to the third slide plate, a movable frame rotatably connected to the fourth slide plate, a second mounting frame slidably connected to the movable frame, and a second welding gun provided on the second mounting frame. Furthermore, the first base plate and the second base plate are respectively provided with bending plates at both ends. There are two fixing plates and first eccentric wheels, which are respectively provided on the upper and lower sides of the bending plates. One of the fixing plates is provided with several connecting rods. The fixing plate is provided with through holes for the connecting rods to pass through. The end of the connecting rod is provided with a first limiting groove and a vertical groove extending to the outside. A connecting groove is provided between the vertical groove and the first limiting groove. A fixing block is slidably connected to the end of the connecting rod. The fixing block is provided with a first limiting block that slides in contact with the first limiting groove, the vertical groove and the connecting groove. A second spring is provided between the fixing block and one of the fixing plates.

[0007] Furthermore, it also includes a drive shaft and a driven shaft that are respectively connected to two first eccentric wheels by keys. A sleeve is rotatably connected to one of the fixed plates. The sleeve is keyed to both the drive shaft and the driven shaft. The driven shaft is rotatably connected to the other fixed plate. The end of the drive shaft is provided with a first external hexagonal joint.

[0008] Furthermore, a first motor is provided on the first base plate, and a first screw threadedly connected to the first slide plate is rotatably connected to the first base plate. The movable end of the first motor is connected to the first screw. A second motor is rotatably connected to the first slide plate, and a second screw rotatably connected to the first mounting bracket is rotatably connected to the first slide plate. The movable end of the second motor is connected to the second screw.

[0009] Furthermore, a first rotating shaft is rotatably connected to the third sliding plate, a second eccentric wheel is provided at one end of the first rotating shaft, an annular groove is provided on the second eccentric wheel, a second sliding rod is provided on the fourth sliding plate that contacts the annular groove, a third motor is provided on the third sliding plate, a first gear is provided at the movable end of the third motor, and a second gear that meshes with the first gear is provided at the other end of the first rotating shaft.

[0010] Furthermore, the fourth slide plate is rotatably connected to a second rotating shaft that is rotatably connected to the movable frame. The end of the second rotating shaft is provided with a third gear. The fourth slide plate is provided with a fourth motor, and the movable end of the fourth motor is provided with a fourth gear that meshes with the third gear.

[0011] Furthermore, a push block connected to the second mounting frame is slidably connected to the movable frame. The push block is provided with a rack and several arc-shaped grooves. A fifth motor is rotatably connected to the movable frame. The movable end of the fifth motor is provided with a cam. The two sides of the cam are respectively provided with convex teeth that mesh with the rack and arc-shaped blocks that contact the arc-shaped grooves.

[0012] Furthermore, the end of the third slide plate is provided with a protruding plate, the first slide plate is provided with a groove for the protruding plate to pass through, the protruding plate is symmetrically rotatably connected with a third rotating shaft, one end of the third rotating shaft is provided with a locking block that contacts the first slide plate, and the two sides of the third slide plate are provided with a number of reinforcing plates that contact the first slide plate.

[0013] Furthermore, a fifth gear is provided at the other end of the third rotating shaft, a fourth rotating shaft is rotatably connected to the convex plate, a sixth gear is keyed to the fourth rotating shaft and meshes with two fifth gears simultaneously, a limiting wheel is provided on the fourth rotating shaft, a plurality of third limiting grooves are provided at the end of the convex plate, third limiting blocks that symmetrically contact the third limiting grooves are provided on the limiting wheel, a third spring is provided between the limiting wheel and the convex plate, and the fourth rotating shaft extends to the outside and is provided with a lever.

[0014] A welding method for a positioning fixture used in the welding of a landscape bridge includes the following steps: S1. Weld the connecting plates to the ends of several steel vertical beams in advance. Before welding the landscape bridge, place several arch beams on top of the main beam so that the connecting plates at the bottom of the arch beams are in contact with the main beams, and the steel vertical beams on the arch beams are in contact with the steel vertical beams on the adjacent arch beams. At the same time, pre-set positioning pins to achieve the initial fixation of the main beam and the arch beams, and the arch beams and the arch beams. S2. When the welding mechanism needs to be set between two arch beams, place the first base plate and the second base plate on one side of the corresponding rigid vertical beam, so that the first welding gun contacts the weld. Then, place the two fixing plates at both ends of the first base plate and insert the first fixing pin and the second fixing pin into the adjustment hole and the corresponding through hole. By rotating the first eccentric wheel on the fixing plate, the side of the first eccentric wheel contacts the first fixing pin. The resulting force is transmitted to the first base plate through the first fixing pin, causing the first base plate to slide relative to the second base plate, shortening the distance between the first sliding plate and the second sliding plate, until the arc plate provided on the first sliding plate and the second sliding plate simultaneously contacts the rigid vertical beam. At the same time, the first spring provided between the arc plate and the L-shaped block is compressed. The rebound force generated after the first spring is compressed acts on the rigid vertical beam through the arc plate, thereby increasing the friction between the rigid vertical beam and the arc plate, and fixing the welding mechanism between the two arch beams. S3. By sliding the first slide plate on the first base plate, the welding torch is moved vertically. In conjunction with the first mounting bracket sliding on the first slide plate, the first welding torch is moved horizontally, thereby achieving the welding of the irregular curved weld between the two rigid vertical beams. S4. Similarly, the welding mechanism is set on the connecting plate and the main beam, so that the first sliding plate is located on the outside of the main beam. Then, the third sliding plate is installed on the first sliding plate. The fourth sliding plate slides on the third sliding plate, and the second mounting bracket slides on the movable frame, driving the second welding gun to move longitudinally and vertically, so that the second welding gun contacts the weld seam on the other side. During the welding process, the first sliding plate slides on the first base plate, and the first mounting bracket slides on the first sliding plate, driving the first welding gun to move laterally and vertically, thereby realizing the welding of the irregular curve weld seam on one side between the main beam and the connecting plate. At the same time, when the first sliding plate slides on the first base plate, it will drive the third sliding plate to move together, driving the second welding gun to move laterally. In conjunction with the second mounting bracket sliding on the movable frame, it will drive the second welding gun to move vertically, thereby realizing the welding of the irregular curve weld seam between the main beam and the connecting plate. S5. When an obstacle blocks the third slide from sliding forward, the movable frame is rotated on the fourth slide, and the second mounting frame is pushed forward on the fourth slide to achieve welding of the obstructed section on the inner side of the main beam.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The connecting plate is attached to the main beam, and the connecting plate and the main beam are welded together using a welding mechanism to achieve the connection between the arch beam and the main beam. The steel vertical beams that come into contact with each other are welded together using the welding mechanism to achieve the connection between the arch beams. This allows the construction of the landscape bridge to be completed without the need for on-site welding of the steel vertical beams and the main beam, reducing non-linear welding, facilitating automated welding, reducing the amount of manual welding on-site, thus shortening the on-site construction cycle of the landscape bridge and reducing the labor intensity of workers. The pre-set positioning pins achieve the initial fixation of the main beam and the arch beam, and the arch beams and the arch beams, to prevent the arch beams from moving freely on the main beam during the welding process, thereby improving the efficiency and quality of the subsequent welding of the landscape bridge. 2. Since the first and second sliding plates are slidably connected, and the first and second sliding plates are respectively slidably mounted on the first and second base plates, the second sliding plate can slide parallel to the first sliding plate. This allows the welding mechanism to be fixed on arch beams and main beams of different widths, adapting to the welding of different types of landscape bridges. It eliminates the need to manufacture different types of fixed fixtures for different landscape bridges, thus reducing the manufacturing cost of the welding mechanism. 3. When the welding mechanism needs to be fixed between two arch beams, place the first base plate and the second base plate on one side of the corresponding rigid vertical beam, so that the first welding gun contacts the weld. Then, place the two fixing plates at both ends of the first base plate and insert the first fixing pin and the second fixing pin into the adjustment hole and the corresponding through hole. By rotating the first eccentric wheel on the fixing plate, the side of the first eccentric wheel contacts the first fixing pin. The resulting force is transmitted to the first base plate through the first fixing pin, causing the first base plate to slide relative to the second base plate, shortening the distance between the first sliding plate and the second sliding plate, until the arc plate on the first sliding plate and the second sliding plate simultaneously contacts the rigid vertical beam. At the same time, the first spring between the arc plate and the L-shaped block is compressed. The rebound force generated after the first spring is compressed acts on the rigid vertical beam through the arc plate, thereby increasing the friction between the rigid vertical beam and the arc plate, fixing the welding mechanism between the two arch beams. It can also adapt to the welding of different types of landscape bridges, eliminating the need to manufacture different types of fixing fixtures for different landscape bridges, thus reducing the manufacturing cost of the welding mechanism. 4. When welding is required between two arch beams, the first sliding plate is slid on the first base plate, which moves the welding torch vertically. The first mounting frame slides on the first sliding plate, which moves the first welding torch horizontally. This allows for the welding of the irregular curved weld between the two rigid vertical beams, meeting the welding requirements of irregular welds in landscape bridges, reducing the amount of manual welding on site, shortening the construction cycle of landscape bridges, and reducing the labor intensity of workers. Similarly, welding of welds on both sides of the rigid vertical beams can be achieved. 5. When welding is required between the main beam and the arch beam, the welding mechanism is similarly set on the connecting plate and the main beam, with the first sliding plate positioned on the outside of the main beam. Then, the third sliding plate is installed on the first sliding plate. The fourth sliding plate slides on the third sliding plate, and the second mounting bracket slides on the movable frame, driving the second welding torch to move longitudinally and vertically, bringing it into contact with the weld seam on the other side. During welding, the first sliding plate slides on the first base plate, and the first mounting bracket slides on the first sliding plate, driving the first welding torch to move laterally and vertically, thus achieving the welding of the irregular curved weld seam on one side between the main beam and the connecting plate. Simultaneously, as the first sliding plate slides on the first base plate, it moves the third sliding plate along with it, causing the second welding torch to move laterally, coordinating with the fourth sliding plate. The second mounting frame slides on the movable frame, driving the second welding gun to move vertically, thereby achieving the welding of the irregular curved weld between the main beam and the connecting plate. This meets the welding requirements of irregular welds in landscape bridges, reduces the amount of manual welding on-site, shortens the on-site construction cycle of landscape bridges, and reduces the labor intensity of workers. At the same time, there is no need to fix the second welding gun separately or drive its movement, reducing the space required for the installation of fixed tooling and power devices and the cost of manufacturing them. In addition, when an obstacle blocks the third sliding plate from sliding forward, the movable frame is rotated on the fourth sliding plate, cooperating with the second mounting frame to advance forward on the fourth sliding plate, achieving the welding of the obstructed section on the inner side of the main beam, further reducing the amount of manual welding on-site, shortening the on-site construction cycle of landscape bridges, and reducing the labor intensity of workers. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the arch beam structure of the present invention.

[0017] Appendix Figure 2 This is a schematic diagram of the structure of the first base plate of the present invention.

[0018] Appendix Figure 3 This is a schematic diagram of the structure of the first sliding plate of the present invention.

[0019] Appendix Figure 4 This is a schematic diagram of the structure of the third sliding plate of the present invention.

[0020] Appendix Figure 5 This is a schematic diagram of the structure of the second sliding plate of the present invention.

[0021] Appendix Figure 6 This is a schematic diagram of the structure of the first slide bar of the present invention.

[0022] Appendix Figure 7 This is a schematic diagram of the structure of the fixing plate of the present invention.

[0023] Appendix Figure 8 This is a schematic diagram of the structure of the first eccentric wheel of the present invention.

[0024] Appendix Figure 9This is a schematic diagram of the connecting rod of the present invention.

[0025] Appendix Figure 10 This is a schematic diagram of the structure of the adjustment hole of the present invention.

[0026] Appendix Figure 11 This is a schematic diagram of the structure of the second eccentric wheel of the present invention.

[0027] Appendix Figure 12 This is a schematic diagram of the cam structure of the present invention.

[0028] Appendix Figure 13 This is a schematic diagram of the convex plate of the present invention.

[0029] Appendix Figure 14 This is a schematic diagram of the structure of the fourth rotating shaft of the present invention.

[0030] The labels shown in the attached diagram: 1. Main beam; 2. Arch beam; 3. Rigid vertical beam; 4. Connecting plate; 5. Positioning pin; 6. First base plate; 7. Second base plate; 8. L-shaped block; 9. First sliding rod; 10. Arc plate; 11. First spring; 12. Fixing plate; 13. First fixing pin; 14. Second fixing pin; 15. Adjustment hole; 16. Through hole; 17. First eccentric wheel; 18. First sliding plate; 19. Second sliding plate; 20. First mounting bracket; 21. First welding torch; 22. Third sliding plate; 23. Fourth sliding plate; 24. Movable frame; 25. Second mounting bracket; 26. Second welding torch; 27. Bending plate; 28. Connecting rod; 29. ​​Through hole; 30. First limiting groove; 31. Vertical groove; 32. Connecting groove; 33. Fixing block; 34. First limiting block; 35. Second spring; 36. Drive shaft; 37. Driven shaft; 38. Sleeve; 39. First external hexagonal connector; 40. First motor; 41. First screw; 42. Second motor; 43. Second screw; 44. First shaft; 45. Second eccentric wheel; 46. Annular groove; 47. Second slide rod; 48. Third motor; 49. First gear; 50. Second gear; 51. Second shaft; 52. Third gear; 53. Fourth motor; 54. Fourth gear; 55. Push block; 56. Rack; 57. Arc groove; 58. Fifth motor; 59. Cam; 60. Convex tooth; 61. Arc block; 62. Convex plate; 63. Slide groove; 64. Third rotating shaft; 65. Locking block; 66. Reinforcing plate; 67. Fifth gear; 68. Fourth rotating shaft; 69. Sixth gear; 70. Limiting wheel; 71. Third limiting groove; 72. Third limiting block; 73. Third spring; 74. Pulley. Detailed Implementation

[0031] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0032] This invention provides a positioning fixture for welding landscape bridges, such as... Figures 1-10 As shown, the structure includes a welding mechanism used in conjunction with the main beam 1 and the arch beam 2. The arch beam 2 includes several rigid vertical beams 3 and connecting plates 4 that connect the bottom of the rigid vertical beams 3 to the main beam 1. Positioning pins 5 are provided on the rigid vertical beams 3 and the main beam 1 respectively, which cooperate with adjacent rigid vertical beams 3 and connecting plates 4. The connecting plates 4 are fitted to the main beam 1, and the welding mechanism welds the connecting plates 4 and the main beam 1, thus achieving the connection between the arch beam 2 and the main beam 1. The welding mechanism also welds the contacting rigid vertical beams 3, achieving the connection between the arch beams 2 and 2. This allows for the construction of the landscape bridge without the need for on-site welding of the rigid vertical beams 3 and the main beam 1, reducing non-linear welding, facilitating automated welding, reducing the workload of on-site manual welding, shortening the on-site construction cycle of the landscape bridge, and reducing the labor intensity of workers. The pre-set positioning pins 5 achieve initial fixation of the main beam 1 and the arch beam 2, and the arch beam 2 and 2, preventing the arch beam 2 from moving arbitrarily on the main beam 1 during welding, thus improving the efficiency and quality of subsequent welding of the landscape bridge. The welding mechanism includes a first base plate 6 and a second base plate 7. Both the first base plate 6 and the second base plate 7 are provided with a plurality of L-shaped blocks 8. A first sliding rod 9 is slidably connected to the L-shaped blocks 8. The end of the first sliding rod 9 is provided with a plurality of arc-shaped plates 10 that contact the main beam 1 or the arch beam 2. A first spring 11 is provided between the arc-shaped plates 10 and the L-shaped blocks 8. It also includes fixing plates 12 symmetrically arranged at both ends of the first base plate 6, and a first fixing pin 13 and a second fixing pin 14 arranged on the first base plate 6 and the second base plate 7. One end of the fixing plate 12 is provided with an adjustment hole 15 for the first fixing pin 13 to pass through, and the other end of the fixing plate 12 is provided with a plurality of through holes 16 for the second fixing pin 14 to pass through. A first eccentric wheel 17 that contacts the first fixing pin 13 is rotatably connected to the fixing plate 12. A first sliding plate 18 and a second sliding plate 19 are slidably connected to the first base plate 6 and the second base plate 7, respectively. The first sliding plate 18 and the second sliding plate 19 are slidably connected. Since the first sliding plate 18 and the second sliding plate 19 are slidably connected, and the first sliding plate 18 and the second sliding plate 19 are slidably set on the first base plate 6 and the second base plate 7, the second sliding plate 19 can slide parallel to the first sliding plate 18. This allows the welding mechanism to be fixed on arch beams 2 and main beams 1 of different widths, adapting to the welding of different types of landscape bridges. It eliminates the need to manufacture different types of fixing fixtures according to different landscape bridges, reducing the manufacturing cost of the welding mechanism. A first mounting frame 20 is slidably connected to the first sliding plate 18, and a first welding gun 21 is provided on the first mounting frame 20. When welding is required between arch beams 2, the first base plate 6 and the second base plate 7 are placed on one side of the corresponding rigid vertical beam 3, so that the first welding torch 21 contacts the weld. Then, two fixing plates 12 are placed at both ends of the first base plate 6, and the first fixing pin 13 and the second fixing pin 14 are inserted into the adjusting hole 15 and the corresponding through hole 16. By rotating the first eccentric wheel 17 on the fixing plate 12, the side of the first eccentric wheel 17 contacts the first fixing pin 13. The resulting force is transmitted to the first base plate 6 through the first fixing pin 13, causing the first base plate 6 to slide relative to the second base plate 7, shortening the distance between the first sliding plate 18 and the second sliding plate 19, until the arc-shaped plate 10 on the first sliding plate 18 and the second sliding plate 19 simultaneously contacts the rigid vertical beam 3, and at the same time compresses the first arc-shaped plate 10 and the L-shaped block 8. Spring 11, the rebound force generated after compression, acts on the rigid vertical beam 3 through the arc plate 10, thereby increasing the friction between the rigid vertical beam 3 and the arc plate 10, fixing the welding mechanism between the two arch beams 2. At the same time, it can adapt to the welding of different types of landscape bridges, eliminating the need to manufacture different types of fixed fixtures for different landscape bridges, thus reducing the manufacturing cost of the welding mechanism. Then, by sliding the first sliding plate 18 on the first base plate 6, the welding torch is driven to move vertically. In conjunction with the first mounting frame 20 sliding on the first sliding plate 18, the first welding torch 21 is driven to move horizontally, thereby realizing the welding of irregular curved welds between the two rigid vertical beams 3, meeting the welding requirements of irregular welds in landscape bridges, reducing the amount of manual welding on site, shortening the on-site construction cycle of landscape bridges, and reducing the labor intensity of workers. Similarly, the welding of welds on both sides of the rigid vertical beam 3 is realized. It also includes a third sliding plate 22 detachably connected to the first sliding plate 18. A fourth sliding plate 23 is slidably connected to the third sliding plate 22. A movable frame 24 is rotatably connected to the fourth sliding plate 23. A second mounting frame 25 is slidably connected to the movable frame 24. A second welding gun 26 is provided on the second mounting frame 25. When welding is required between the main beam 1 and the arch beam 2, the welding mechanism is similarly set on the connecting plate 4 and the main beam 1, so that the first sliding plate 18 is located on the outside of the main beam 1. Then, the third sliding plate 22 is installed on the first sliding plate 18. The fourth sliding plate 23 slides on the third sliding plate 22, and the second mounting frame 25 slides on the movable frame 24, driving the second welding gun 26 to move longitudinally and vertically, so that the second welding gun 26 contacts the weld seam on the other side. During the welding process, the first sliding plate 18 slides on the first base plate 6, and the first mounting frame 20 slides on the first sliding plate 18, driving the first welding gun 21 to move laterally and vertically, thereby realizing the irregular curve on one side between the main beam 1 and the connecting plate 4. During the welding of the weld seam, as the first sliding plate 18 slides on the first base plate 6, it will drive the third sliding plate 22 to move together, causing the second welding gun 26 to move laterally. In conjunction with the second mounting frame 25 sliding on the movable frame 24, the second welding gun 26 will move vertically, thereby realizing the welding of the irregular curved weld seam between the main beam 1 and the connecting plate 4. This meets the welding requirements of irregular weld seams in landscape bridges, reduces the amount of manual welding on site, shortens the on-site construction cycle of landscape bridges, and reduces the labor intensity of workers. At the same time, there is no need to fix the second welding gun 26 separately or drive the second welding gun 26 to move, reducing the space required for the installation of fixed tooling and power devices and the cost of manufacturing. In addition, when an obstacle is encountered that prevents the third sliding plate 22 from sliding forward, the movable frame 24 is rotated on the fourth sliding plate 23, and the second mounting frame 25 is pushed forward on the fourth sliding plate 23 to realize the welding of the obstructed section on the inner side of the main beam 1, further reducing the amount of manual welding on site, shortening the on-site construction cycle of landscape bridges, and reducing the labor intensity of workers.

[0033] Preferred, such as Figures 7-10As shown, the first base plate 6 and the second base plate 7 are respectively provided with bending plates 27 at both ends. There are two fixing plates 12 and first eccentric wheels 17, which are respectively arranged on the upper and lower sides of the bending plates 27, thereby strengthening the connection between the first base plate 6 and the second base plate 7, avoiding bending deformation of the fixing plate 12 during the fixing and welding process, and thus improving the welding quality of the landscape bridge. One of the fixing plates 12 is provided with several connecting rods 28, and the fixing plate 12 is provided with through holes 29 for the connecting rods 28 to pass through. The end of the connecting rod 28 is provided with a first limiting groove 30 and a vertical groove 31 extending outward. A connecting groove 32 is provided between the vertical groove 31 and the first limiting groove 30. A fixing block 33 is slidably connected to the end of the connecting rod 28. The fixing block 33 is provided with a first limiting block 34 that slides in contact with the first limiting groove 30, the vertical groove 31 and the connecting groove 32. A second spring 35 is provided between the fixing block 33 and one of the fixing plates 12. When it is necessary to fix two fixing plates 12, the connecting rod 28 provided on one fixing plate 12 is passed through the other fixing plate 12. After the through hole 29 is provided on the fixing plate 12, the fixing block 33 slides on the connecting rod 28, so that the first limiting block 34 provided on the fixing block 33 slides into the vertical groove 31 until the first limiting block 34 moves to the bottom of the vertical groove 31 and compresses the second spring 35. Then the fixing block 33 is rotated so that the first limiting block 34 rotates into the connecting groove 32. After rotating to the end of the connecting groove 32, the external force is continued. Under the action of the rebound force of the second spring 35, the fixing block 33 is moved upward, so that the first limiting block 34 moves upward into the first limiting position. Within the groove 30, the first limiting block 34 contacts the first limiting groove 30, and the resulting resistance restricts the rotation of the fixing block 33 and limits the continued upward movement of the fixing block 33, thereby fixing the fixing block 33. At the same time, the rebound force generated by the compression of the second spring 35 restricts the movement of the two fixing plates 12, further enhancing the stability between the two fixing plates 12, thereby strengthening the connection between the first base plate 6 and the second base plate 7, avoiding bending and deformation of the fixing plates 12 during the fixing and welding process, and thus improving the welding quality of the landscape bridge.

[0034] Preferred, such as Figures 7-10As shown, it also includes a drive shaft 36 and a driven shaft 37 that are keyed to the two first eccentric wheels 17 respectively. A sleeve 38 is rotatably connected to one of the fixed plates 12. The sleeve 38 is keyed to both the drive shaft 36 and the driven shaft 37. The driven shaft 37 is rotatably connected to the other fixed plate 12. The end of the drive shaft 36 is provided with a first external hexagonal connector 39. When it is necessary to rotate the two first eccentric wheels 17, the first hexagonal connector is rotated by the internal hexagonal handle, which drives the drive shaft 36 to rotate on one of the fixed plates 12. Since the sleeve 38 is keyed to both the drive shaft 36 and the driven shaft 37, the torque generated by the rotation of the drive shaft 36 is transmitted to the driven shaft 37 through the sleeve 38, causing the driven shaft 37 to rotate together, thereby driving the other first eccentric wheel 17 to rotate. It is not necessary to drive the two first eccentric wheels 17 to rotate separately, which simplifies the operation steps of fixing and welding the structure, thereby improving the efficiency of welding the landscape bridge.

[0035] Preferred, such as Figure 3 and Figure 5 As shown, a first motor 40 is provided on the first base plate 6, and a first screw 41 that is threadedly connected to the first slide plate 18 is rotatably connected to the first base plate 6. The movable end of the first motor 40 is connected to the first screw 41 to provide power for the sliding of the first slide plate 18 on the first base plate 6. A second motor 42 is rotatably connected to the first slide plate 18, and a second screw 43 that is rotatably connected to the first mounting bracket 20 is rotatably connected to the first slide plate 18. The movable end of the second motor 42 is connected to the second screw 43 to provide power for the sliding of the first mounting bracket 20 on the first slide plate 18.

[0036] Preferred, such as Figure 11As shown, a first rotating shaft 44 is rotatably connected to the third sliding plate 22. One end of the first rotating shaft 44 is provided with a second eccentric wheel 45, which has an annular groove 46. The fourth sliding plate 23 is provided with a second sliding rod 47 that contacts the annular groove 46. The third sliding plate 22 is equipped with a third motor 48. The movable end of the third motor 48 is provided with a first gear 49. The other end of the first rotating shaft 44 is provided with a second gear 50 that meshes with the first gear 49. When the position of the fourth sliding plate 23 on the third sliding plate 22 needs to be finely adjusted, the first gear 49 is rotated by the third motor 48. Since the second gear 50 meshes with the first gear 49, it drives the first rotating shaft 44 to rotate. The position of the fourth sliding plate 23 on the third sliding plate 22 can be adjusted by adjusting the first gear 49 and the second gear 50. The number of teeth on the second gear 50 changes the transmission ratio between the motor and the first rotating shaft 44, allowing for better control of the rotation amplitude of the second eccentric wheel 45, improving the accuracy of adjusting the position of the second welding torch 26, and thus improving the quality of the welded landscape bridge. When the first rotating shaft 44 rotates, it will drive the second eccentric wheel 45 to rotate. Since the second sliding rod 47 on the fourth sliding plate 23 is in contact with the annular groove 46, the resulting component force drives the fourth sliding plate 23 to move, thereby adjusting the position of the second welding torch 26. Furthermore, after adjustment, when an external force is applied to the fourth sliding plate 23, the resistance generated by the contact between the second sliding rod 47 and the annular groove 46 will restrict the fourth sliding plate 23 from sliding on the third sliding plate 22, thereby improving the stability of the overall structure and the quality of the welded landscape bridge.

[0037] Preferred, such as Figure 11 As shown, a second rotating shaft 51, which is rotatably connected to the movable frame 24, is rotatably connected to the fourth sliding plate 23. A third gear 52 is provided at the end of the second rotating shaft 51. A fourth motor 53 is provided on the fourth sliding plate 23. A fourth gear 54, which meshes with the third gear 52, is provided at the movable end of the fourth motor 53. By controlling the number of teeth of the third gear 52 and the fourth gear 54, the transmission ratio between the fourth motor 53 and the second rotating shaft 51 is changed, thereby better controlling the rotation amplitude of the movable frame 24, improving the accuracy of adjusting the position of the second welding torch 26, and thus improving the quality of welding the landscape bridge.

[0038] Preferred, such as Figure 11 and Figure 12As shown, a push block 55 connected to a second mounting frame 25 is slidably connected to the movable frame 24. The push block 55 is provided with a rack 56 and several arc-shaped grooves 57. A fifth motor 58 is rotatably connected to the movable frame 24. The movable end of the fifth motor 58 is provided with a cam 59. The two sides of the cam 59 are respectively provided with protruding teeth 60 that mesh with the rack 56 and arc-shaped blocks 61 that contact the arc-shaped grooves 57. The fifth motor 58 drives the cam 59 to rotate, causing the arc-shaped blocks 61 to slide out of the arc-shaped grooves 57, thus releasing the... In addition to restricting the sliding of the second mounting bracket 25 on the movable bracket 24, the torque generated by the engagement of the convex tooth 60 with the rack 56 drives the second mounting bracket 25 to slide on the movable bracket 24, adjusting the position of the second welding torch 26. After adjustment, the arc-shaped block 61 will slide back into the arc-shaped groove 57, restricting the sliding of the second mounting bracket 25 on the movable bracket 24 and preventing external forces from unintentionally causing the second mounting bracket 25 to move on the movable bracket 24, thereby improving the stability of the second welding torch 26 during the welding process and thus improving the quality of the welded landscape bridge.

[0039] Preferred, such as Figure 13 and Figure 14 As shown, the third slide plate 22 has a protruding plate 62 at its end, and the first slide plate 18 has a groove 63 for the protruding plate 62 to pass through. A third rotating shaft 64 is symmetrically rotatably connected to the protruding plate 62. One end of the third rotating shaft 64 has a locking block 65 that contacts the first slide plate 18. Several reinforcing plates 66 that contact the first slide plate 18 are provided on both sides of the third slide plate 22. When installing the third slide plate 22, the protruding plate 62 at the end of the third slide plate 22 is inserted into the groove 63 of the first slide plate 18 until the groove 63 on both sides of the third slide plate 22 is inserted. Several reinforcing plates contact the first sliding plate 18, restricting the third sliding plate 22 from sliding further. Then, the third rotating shaft 64 is rotated on the convex plate 62, causing the locking block 65 to slide out of the convex plate 62 and contact the first sliding plate 18. The resulting resistance restricts the sliding of the third sliding plate 22 and restricts the convex plate 62 from sliding out of the slide groove 63 in the opposite direction, thereby fixing the third sliding plate 22 on the first sliding plate 18. At the same time, the reinforcing plates enhance the stability between the third sliding plate 22 and the first sliding plate 18, improve the stability of the second welding gun 26 during the welding process, and thus improve the quality of the welded landscape bridge.

[0040] Preferred, such as Figure 13 and Figure 14As shown, the other end of the third rotating shaft 64 is provided with a fifth gear 67. A fourth rotating shaft 68 is rotatably connected to the convex plate 62. A sixth gear 69, which meshes with two fifth gears 67 simultaneously, is keyed to the fourth rotating shaft 68. A limiting wheel 70 is provided on the fourth rotating shaft 68. The end of the convex plate 62 is provided with several third limiting grooves 71. The limiting wheel 70 is symmetrically provided with third limiting blocks 72 that contact the third limiting grooves 71. A third spring 73 is provided between the limiting wheel 70 and the convex plate 62. The fourth rotating shaft 68 extends to the outside and is provided with a lever 74. When it is necessary to disconnect the third sliding plate 22 from the first sliding plate 18, the lever 74 is pushed upward to drive the fourth rotating shaft 68. Shaft 68 and limiting wheel 70 move together, causing the third limiting block 72 on one side of the limiting wheel 70 to slide out of the third limiting groove 71, releasing the restriction on the rotation of the fourth rotating shaft 68, and compressing the third spring 73. Then, the lever 74 is rotated, driving the fourth rotating shaft 68 to rotate. Since the fourth rotating shaft 68 is keyed to the sixth gear 69, it will drive the sixth gear 69 to rotate together. Since the sixth gear 69 is simultaneously meshed with two fifth gears 67, the torque generated is transmitted to the third rotating shaft 64 through the two fifth gears 67, thereby driving the two third rotating shafts 64 to rotate together, changing the position of the locking block 65, so that the locking block 65 slides into the protrusion 62, releasing the restriction of the third slide plate 22 on the first slide plate 18.

[0041] A welding method for a positioning fixture used in the welding of a landscape bridge, such as... Figures 1-10 As shown, it includes the following steps: S1. The connecting plate 4 is pre-welded to the ends of several steel vertical beams 3. Before welding the landscape bridge, several arch beams 2 are placed above the main beam 1, so that the connecting plate 4 at the bottom of the arch beam 2 is in contact with the main beam 1, and the steel vertical beams 3 on the arch beam 2 are in contact with the steel vertical beams 3 on the adjacent arch beams 2. There is no need to weld the steel vertical beams 3 to the main beam 1 on site, which reduces non-linear welding, facilitates automated welding, reduces the amount of manual welding on site, thereby shortening the construction cycle of the landscape bridge and reducing the labor intensity of workers. The pre-set positioning pin 5 realizes the initial fixation of the main beam 1 and the arch beam 2, and the arch beam 2 and the arch beam 2, to prevent the arch beam 2 from moving randomly on the main beam 1 during the welding process, and improves the efficiency and quality of subsequent welding of the landscape bridge. S2. When the welding mechanism needs to be set between the two arch beams 2, the first base plate 6 and the second base plate 7 are placed on one side of the corresponding rigid vertical beam 3, so that the first welding torch 21 is in contact with the weld. Then, the two fixing plates 12 are placed at both ends of the first base plate 6, and the first fixing pin 13 and the second fixing pin 14 are inserted into the adjusting hole 15 and the corresponding through hole 16. By rotating the first eccentric wheel 17 on the fixing plate 12, the side of the first eccentric wheel 17 contacts the first fixing pin 13, and the resulting component force is transmitted to the first base plate 6 through the first fixing pin 13, causing the first base plate 6 to slide relative to the second base plate 7. The distance between the first sliding plate 18 and the second sliding plate 19 is shortened until the arc-shaped plate 10 on the first sliding plate 18 and the second sliding plate 19 simultaneously contacts the rigid vertical beam 3. At the same time, the first spring 11 between the arc-shaped plate 10 and the L-shaped block 8 is compressed. The rebound force generated after the first spring 11 is compressed acts on the rigid vertical beam 3 through the arc-shaped plate 10, thereby increasing the friction between the rigid vertical beam 3 and the arc-shaped plate 10. The welding mechanism is fixed between the two arch beams 2. At the same time, it can adapt to the welding of different types of landscape bridges, without the need to manufacture different types of fixed fixtures according to different landscape bridges, thus reducing the manufacturing cost of the welding mechanism. S3. By sliding the first sliding plate 18 on the first base plate 6, the welding torch moves vertically. In conjunction with the first mounting frame 20 sliding on the first sliding plate 18, the first welding torch 21 moves horizontally, thereby achieving the welding of the irregular curved weld between the two rigid vertical beams 3. This meets the welding requirements of irregular welds in the landscape bridge, reduces the amount of manual welding on site, shortens the construction cycle of the landscape bridge, and reduces the labor intensity of workers. Similarly, the welding of welds on both sides of the rigid vertical beam 3 is achieved. S4. Similarly, the welding mechanism is set on the connecting plate 4 and the main beam 1, so that the first sliding plate 18 is located on the outside of the main beam 1. Then, the third sliding plate 22 is installed on the first sliding plate 18. The fourth sliding plate 23 slides on the third sliding plate 22, and the second mounting bracket 25 slides on the movable bracket 24, driving the second welding torch 26 to move longitudinally and vertically, so that the second welding torch 26 contacts the weld seam on the other side. During the welding process, the first sliding plate 18 slides on the first base plate 6, and the first mounting bracket 20 slides on the first sliding plate 18, driving the first welding torch 21 to move laterally and vertically, thereby realizing the irregular curved weld seam on one side between the main beam 1 and the connecting plate 4. The welding process involves the first sliding plate 18 sliding on the first base plate 6, which in turn moves the third sliding plate 22, causing the second welding gun 26 to move laterally. This, combined with the second mounting frame 25 sliding on the movable frame 24, causes the second welding gun 26 to move vertically, thereby achieving the welding of the irregular curved weld between the main beam 1 and the connecting plate 4. This meets the welding requirements of irregular welds in the landscape bridge, reduces the amount of manual welding on site, shortens the construction cycle of the landscape bridge, and reduces the labor intensity of workers. At the same time, it eliminates the need to separately fix the second welding gun 26 and drive its movement, reducing the space required for the installation of fixed fixtures and power devices and the cost of manufacturing them. S5. When an obstacle blocks the third sliding plate 22 from sliding forward, the movable frame 24 is rotated on the fourth sliding plate 23, and the second mounting frame 25 is pushed forward on the fourth sliding plate 23 to achieve welding of the obstructed section on the inner side of the main beam 1. This further reduces the amount of manual welding on site, shortens the construction cycle of the landscape bridge, and reduces the labor intensity of workers.

[0042] Example 1 This invention provides a positioning fixture for welding landscape bridges and a welding method thereof, such as... Figures 1-10 As shown, the connecting plate 4 is attached to the main beam 1, and the connecting plate 4 and the main beam 1 are welded together using a welding mechanism to achieve the connection between the arch beam 2 and the main beam 1. The steel vertical beams 3 that are in contact with each other are welded together using a welding mechanism to achieve the connection between the arch beams 2 and the arch beams 2. This allows the construction of the landscape bridge to be completed without the need to weld the steel vertical beams 3 and the main beam 1 on site, reducing non-linear welding, facilitating automated welding, reducing the amount of manual welding on site, thereby shortening the on-site construction cycle of the landscape bridge and reducing the labor intensity of workers. The pre-set positioning pins 5 achieve the initial fixation of the main beam 1 and the arch beam 2, and the arch beams 2 and the arch beams 2, preventing the arch beams 2 from moving arbitrarily on the main beam 1 during the welding process, and improving the efficiency and quality of subsequent welding of the landscape bridge. Since the first sliding plate 18 and the second sliding plate 19 are slidably connected, and the first sliding plate 18 and the second sliding plate 19 are respectively slidably set on the first base plate 6 and the second base plate 7, the second sliding plate 19 can slide parallel to the first sliding plate 18, so that the welding mechanism can be fixed on the arch beam 2 and the main beam 1 of different widths, adapting to the welding of different types of landscape bridges, without the need to manufacture different types of fixed fixtures according to different landscape bridges, thus reducing the manufacturing cost of the welding mechanism. When welding is required between arch beams 2, the first base plate 6 and the second base plate 7 are placed on one side of the corresponding rigid vertical beam 3, so that the first welding torch 21 contacts the weld. Then, two fixing plates 12 are placed at both ends of the first base plate 6, and the first fixing pin 13 and the second fixing pin 14 are inserted into the adjusting hole 15 and the corresponding through hole 16. By rotating the first eccentric wheel 17 on the fixing plate 12, the side of the first eccentric wheel 17 contacts the first fixing pin 13. The resulting force is transmitted to the first base plate 6 through the first fixing pin 13, causing the first base plate 6 to slide relative to the second base plate 7, shortening the distance between the first sliding plate 18 and the second sliding plate 19, until the arc-shaped plate 10 on the first sliding plate 18 and the second sliding plate 19 simultaneously contacts the rigid vertical beam 3, and at the same time compresses the first arc-shaped plate 10 and the L-shaped block 8. Spring 11, the rebound force generated after compression, acts on the rigid vertical beam 3 through the arc plate 10, thereby increasing the friction between the rigid vertical beam 3 and the arc plate 10, fixing the welding mechanism between the two arch beams 2. At the same time, it can adapt to the welding of different types of landscape bridges, eliminating the need to manufacture different types of fixed fixtures for different landscape bridges, thus reducing the manufacturing cost of the welding mechanism. Then, by sliding the first sliding plate 18 on the first base plate 6, the welding torch is driven to move vertically. In conjunction with the first mounting frame 20 sliding on the first sliding plate 18, the first welding torch 21 is driven to move horizontally, thereby realizing the welding of irregular curved welds between the two rigid vertical beams 3, meeting the welding requirements of irregular welds in landscape bridges, reducing the amount of manual welding on site, shortening the on-site construction cycle of landscape bridges, and reducing the labor intensity of workers. Similarly, the welding of welds on both sides of the rigid vertical beam 3 is realized. When welding is required between the main beam 1 and the arch beam 2, the welding mechanism is similarly set on the connecting plate 4 and the main beam 1, so that the first sliding plate 18 is located on the outside of the main beam 1. Then, the third sliding plate 22 is installed on the first sliding plate 18. The fourth sliding plate 23 slides on the third sliding plate 22, and the second mounting bracket 25 slides on the movable bracket 24, driving the second welding torch 26 to move longitudinally and vertically, so that the second welding torch 26 contacts the weld seam on the other side. During the welding process, the first sliding plate 18 slides on the first base plate 6, and the first mounting bracket 20 slides on the first sliding plate 18, driving the first welding torch 21 to move laterally and vertically, thereby realizing the welding of the irregular curve weld seam on one side between the main beam 1 and the connecting plate 4. At the same time, when the first sliding plate 18 slides on the first base plate 6, it will drive the third sliding plate 22 to move together, driving the second welding torch 26 to move along the first sliding plate 18. Lateral movement, in conjunction with the sliding of the second mounting frame 25 on the movable frame 24, drives the second welding gun 26 to move vertically, thereby achieving the welding of the irregular curved weld between the main beam 1 and the connecting plate 4, meeting the welding requirements of irregular welds in landscape bridges, reducing the amount of manual welding on site, shortening the on-site construction cycle of landscape bridges, and reducing the labor intensity of workers. At the same time, there is no need to separately fix the second welding gun 26 and drive the second welding gun 26 to move, reducing the space required for the installation of fixed tooling and power devices and the cost of manufacturing. In addition, when an obstacle is encountered that prevents the third sliding plate 22 from sliding forward, the movable frame 24 is rotated on the fourth sliding plate 23, and the second mounting frame 25 is pushed forward on the fourth sliding plate 23 to achieve the welding of the obstructed section on the inner side of the main beam 1, further reducing the amount of manual welding on site, shortening the on-site construction cycle of landscape bridges, and reducing the labor intensity of workers.

[0043] Example 2 Based on Example 1, such as Figures 7-10As shown, when two fixing plates 12 need to be fixed, the connecting rod 28 on one fixing plate 12 is passed through the through hole 29 on the other fixing plate 12. Then, the fixing block 33 slides on the connecting rod 28, so that the first limiting block 34 on the fixing block 33 slides into the vertical groove 31 until the first limiting block 34 moves to the bottom of the vertical groove 31 and compresses the second spring 35. Then, the fixing block 33 is rotated so that the first limiting block 34 rotates into the connecting groove 32. After rotating to the end of the connecting groove 32, the external force is continuously applied. Under the action of the rebound force of the second spring 35, the fixing block 33 is moved upward. This causes the first limiting block 34 to move upward into the first limiting groove 30. The resistance generated by the contact between the first limiting block 34 and the first limiting groove 30 will restrict the rotation of the fixing block 33 and prevent the fixing block 33 from moving upward, thereby fixing the fixing block 33. At the same time, the rebound force generated by the compression of the second spring 35 will restrict the movement of the two fixing plates 12, further strengthening the stability between the two fixing plates 12, thereby strengthening the connection between the first base plate 6 and the second base plate 7, avoiding bending and deformation of the fixing plate 12 during the fixing and welding process, and thus improving the welding quality of the landscape bridge. When it is necessary to rotate the two first eccentric wheels 17, the first hexagonal joint is rotated by the internal hexagonal handle, which drives the drive shaft 36 to rotate on one of the fixed plates 12. Since the sleeve 38 is keyed to both the drive shaft 36 and the driven shaft 37, the torque generated by the rotation of the drive shaft 36 is transmitted to the driven shaft 37 through the sleeve 38, causing the driven shaft 37 to rotate together, thereby driving the other first eccentric wheel 17 to rotate. There is no need to drive the two first eccentric wheels 17 to rotate separately, which simplifies the operation steps of fixing the welding structure and improves the efficiency of welding landscape bridges.

[0044] Example 3 Based on Example 1, such as Figure 4 , Figure 13 and Figure 14As shown, when the third slide plate 22 needs to be installed, the protruding plate 62 at the end of the third slide plate 22 is inserted into the sliding groove 63 of the first slide plate 18 until the reinforcing plates on both sides of the third slide plate 22 come into contact with the first slide plate 18, restricting the third slide plate 22 from sliding further. Then, by pushing the lever 74 upward, the fourth rotating shaft 68 and the limiting wheel 70 are moved together, so that the third limiting block 72 on one side of the limiting wheel 70 slides out of the third limiting groove 71, releasing the restriction on the rotation of the fourth rotating shaft 68, and compressing the third spring 73. Then, the lever 74 is rotated, driving the fourth rotating shaft 68 to rotate. Since the fourth rotating shaft 68 is keyed to the sixth gear 69, it will drive the sixth gear 69 to rotate together. Since the sixth gear 69 is simultaneously meshed with two fifth gears 67, the torque generated is transmitted to the third rotating shaft 64 through the two fifth gears 67, thereby driving the two third shafts 64 to rotate together, changing the rotation. The position of the locking block 65 allows it to slide out of the protruding plate 62 and contact the first sliding plate 18. The resulting resistance restricts the sliding of the third sliding plate 22 and prevents the protruding plate 62 from sliding out of the groove 63 in the opposite direction, thereby fixing the third sliding plate 22 onto the first sliding plate 18. At the same time, the reinforcement plate enhances the stability between the third sliding plate 22 and the first sliding plate 18, improving the stability of the second welding torch 26 during the welding process, and thus improving the quality of the welded landscape bridge. Finally, the power applied to the lever 74 is removed, and the rebound force generated by the compression of the third spring 73 will drive the limiting wheel 70 to reset, allowing the third limiting block 72 to re-enter the third limiting groove 71. The resulting resistance will restrict the rotation of the limiting wheel 70 and the third rotating shaft 64 relative to the protruding plate 62, thereby preventing external forces from unintentionally changing the position of the locking block 65 and ensuring that the third sliding plate 22 is always fixed on the first sliding plate 18 during the welding process, thus improving the quality of the welded landscape bridge.

Claims

1. A positioning fixture for welding landscape bridges, comprising a welding mechanism for use with a main beam and an arch beam, wherein the arch beam comprises a plurality of rigid vertical beams and a connecting plate connected to the bottom of the rigid vertical beams and the main beam, and the rigid vertical beams and the main beam are respectively provided with positioning pins for use with adjacent rigid vertical beams and connecting plates, characterized in that: The welding mechanism includes a first base plate and a second base plate. Each base plate has several L-shaped blocks. A first sliding rod is slidably connected to each L-shaped block. The end of the first sliding rod has several arc-shaped plates that contact the main beam or arch beam. A first spring is provided between the arc-shaped plates and the L-shaped blocks. The mechanism also includes fixed plates symmetrically arranged at both ends of the first base plate, and a first fixing pin and a second fixing pin disposed on the first and second base plates. One end of the fixed plate has an adjustment hole for the first fixing pin to pass through, and the other end has several through holes for the second fixing pin to pass through. A first eccentric wheel, in contact with the first fixing pin, is rotatably connected to the fixed plate. A first sliding plate and a second sliding plate are slidably connected to the first and second base plates, respectively. The first sliding plate and the second sliding plate are slidably connected. A first mounting frame is slidably connected to the first sliding plate, and a first welding torch is disposed on the first mounting frame. It also includes a third slide plate detachably connected to the first slide plate, a fourth slide plate slidably connected to the third slide plate, a movable frame rotatably connected to the fourth slide plate, a second mounting frame slidably connected to the movable frame, and a second welding gun provided on the second mounting frame; The first base plate and the second base plate are respectively provided with bending plates at both ends. There are two fixing plates and first eccentric wheels, which are respectively provided on the upper and lower sides of the bending plates. One of the fixing plates is provided with several connecting rods. The fixing plate is provided with through holes for the connecting rods to pass through. The end of the connecting rod is provided with a first limiting groove and a vertical groove extending to the outside. A connecting groove is provided between the vertical groove and the first limiting groove. A fixing block is slidably connected to the end of the connecting rod. The fixing block is provided with a first limiting block that slides in contact with the first limiting groove, the vertical groove and the connecting groove. A second spring is provided between the fixing block and one of the fixing plates.

2. The positioning tool for welding a landscape bridge according to claim 1, wherein: It also includes a drive shaft and a driven shaft that are respectively connected to two first eccentric wheels by keys. A sleeve is rotatably connected to one of the fixed plates. The sleeve is keyed to both the drive shaft and the driven shaft. The driven shaft is rotatably connected to the other fixed plate. The end of the drive shaft is provided with a first external hexagonal joint.

3. The positioning tool for welding a landscape bridge according to claim 1, wherein: A first motor is provided on the first base plate, and a first screw is rotatably connected to the first base plate and threadedly connected to the first slide plate. The movable end of the first motor is connected to the first screw. A second motor is rotatably connected to the first slide plate, and a second screw is rotatably connected to the first mounting bracket. The movable end of the second motor is connected to the second screw.

4. The positioning fixture for welding landscape bridges according to claim 1, characterized in that: The third slide plate is rotatably connected to a first rotating shaft. One end of the first rotating shaft is provided with a second eccentric wheel. The second eccentric wheel is provided with an annular groove. The fourth slide plate is provided with a second sliding rod that contacts the annular groove. The third slide plate is provided with a third motor. The movable end of the third motor is provided with a first gear. The other end of the first rotating shaft is provided with a second gear that meshes with the first gear.

5. The positioning fixture for welding landscape bridges according to claim 1, characterized in that: The fourth slide plate is rotatably connected to a second rotating shaft that is rotatably connected to the movable frame. The end of the second rotating shaft is provided with a third gear. The fourth slide plate is provided with a fourth motor, and the movable end of the fourth motor is provided with a fourth gear that meshes with the third gear.

6. The positioning fixture for welding landscape bridges according to claim 1, characterized in that: The movable frame is slidably connected to a push block that is connected to a second mounting frame. The push block is provided with a rack and several arc-shaped grooves. The movable frame is rotatably connected to a fifth motor. The movable end of the fifth motor is provided with a cam. The two sides of the cam are respectively provided with convex teeth that mesh with the rack and arc-shaped blocks that contact the arc-shaped grooves.

7. The positioning fixture for welding landscape bridges according to claim 1, characterized in that: The end of the third slide plate is provided with a protruding plate, and the first slide plate is provided with a groove for the protruding plate to pass through. A third rotating shaft is symmetrically rotatably connected to the protruding plate. One end of the third rotating shaft is provided with a locking block that contacts the first slide plate. Several reinforcing plates that contact the first slide plate are provided on both sides of the third slide plate.

8. The positioning fixture for welding landscape bridges according to claim 7, characterized in that: The other end of the third rotating shaft is provided with a fifth gear. A fourth rotating shaft is rotatably connected to the convex plate. A sixth gear that meshes with two fifth gears simultaneously is keyed to the fourth rotating shaft. A limiting wheel is provided on the fourth rotating shaft. Several third limiting grooves are provided at the end of the convex plate. Third limiting blocks that contact the third limiting grooves are symmetrically provided on the limiting wheel. A third spring is provided between the limiting wheel and the convex plate. The fourth rotating shaft extends to the outside and is provided with a lever.

9. The welding method for a positioning fixture for welding a landscape bridge according to claim 1, characterized in that: Includes the following steps: S1. Weld the connecting plates to the ends of several steel vertical beams in advance. Before welding the landscape bridge, place several arch beams on top of the main beam so that the connecting plates at the bottom of the arch beams are in contact with the main beams, and the steel vertical beams on the arch beams are in contact with the steel vertical beams on the adjacent arch beams. At the same time, pre-set positioning pins to achieve the initial fixation of the main beam and the arch beams, and the arch beams and the arch beams. S2. When the welding mechanism needs to be set between two arch beams, place the first base plate and the second base plate on one side of the corresponding rigid vertical beam, so that the first welding gun contacts the weld. Then, place the two fixing plates at both ends of the first base plate and insert the first fixing pin and the second fixing pin into the adjustment hole and the corresponding through hole. By rotating the first eccentric wheel on the fixing plate, the side of the first eccentric wheel contacts the first fixing pin. The resulting force is transmitted to the first base plate through the first fixing pin, causing the first base plate to slide relative to the second base plate, shortening the distance between the first sliding plate and the second sliding plate, until the arc plate provided on the first sliding plate and the second sliding plate simultaneously contacts the rigid vertical beam. At the same time, the first spring provided between the arc plate and the L-shaped block is compressed. The rebound force generated after the first spring is compressed acts on the rigid vertical beam through the arc plate, thereby increasing the friction between the rigid vertical beam and the arc plate, and fixing the welding mechanism between the two arch beams. S3. By sliding the first slide plate on the first base plate, the welding torch is moved vertically. In conjunction with the first mounting bracket sliding on the first slide plate, the first welding torch is moved horizontally, thereby achieving the welding of the irregular curved weld between the two rigid vertical beams. S4. Similarly, the welding mechanism is set on the connecting plate and the main beam, so that the first sliding plate is located on the outside of the main beam. Then, the third sliding plate is installed on the first sliding plate. The fourth sliding plate slides on the third sliding plate, and the second mounting bracket slides on the movable frame, driving the second welding gun to move longitudinally and vertically, so that the second welding gun contacts the weld seam on the other side. During the welding process, the first sliding plate slides on the first base plate, and the first mounting bracket slides on the first sliding plate, driving the first welding gun to move laterally and vertically, thereby realizing the welding of the irregular curve weld seam on one side between the main beam and the connecting plate. At the same time, when the first sliding plate slides on the first base plate, it will drive the third sliding plate to move together, driving the second welding gun to move laterally. In conjunction with the second mounting bracket sliding on the movable frame, it will drive the second welding gun to move vertically, thereby realizing the welding of the irregular curve weld seam between the main beam and the connecting plate. S5. When an obstacle blocks the third slide from sliding forward, the movable frame is rotated on the fourth slide, and the second mounting frame is pushed forward on the fourth slide to achieve welding of the obstructed section on the inner side of the main beam.

Images