Welding equipment for assembling steel bridge arch rib

Abstract

The invention discloses welding equipment for assembling a steel bridge arch rib, and relates to the technical field of arch bridge construction, the welding equipment comprises a base, a laser welding gun is arranged above the base, an arch rib horizontal displacement limiting piece and an arch rib vertical displacement limiting piece are further arranged at the top of the base, and the arch rib horizontal displacement limiting piece comprises an arch rib supporting seat; the length direction of the arch rib supporting seat is perpendicular to the axial direction of the arch rib, a semicircular notch is formed in the top of the arch rib supporting seat, and two positioning rods are symmetrically arranged on the inner wall of the semicircular notch in the circumferential direction; the arch rib fixing piece comprises a pressing plate pressed on the top surface of the arch rib; the arch rib supporting base and the pressing plate are used in cooperation, displacement of the arch rib in the horizontal direction and the vertical direction is limited, the welding faces of the arch rib can be tightly attached together, the dislocation phenomenon of the welding faces is avoided, and the welding precision is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of arch bridge construction, in particular to welding equipment for assembling steel bridge arch ribs. Background Art

[0002] Arch ribs are the components of arch bridges. The main function of arch ribs is to bear the thrust of the arch and transfer it to supporting structures such as piers or abutments. During the construction of an arch bridge, the main arch ring of the arch bridge is divided into several arch ribs for easy transportation. When transported to the construction site, workers are required to weld adjacent arch ribs. When adjacent arch ribs are fitted together, the stability is poor, which can easily cause the arch ribs to shake, making it impossible for adjacent arch ribs to be completely aligned, affecting the workers' welding accuracy of adjacent arch ribs.

[0003] After searching, a Chinese patent application disclosed a patent named "A kind of arch rib welding auxiliary device" (publication number CN211708528U), which includes an arch rib, and a slide groove arranged around the axis of the arch rib is opened on the outer periphery of one end of the arch rib, and a rotating ring is movably connected in the slide groove; the outer periphery of the rotating ring is detachably connected with a first auxiliary ring, the first auxiliary ring is wrapped around a part of the outer periphery of the rotating ring, a plug-in hole is opened on one side surface of the first auxiliary ring, and a semicircular hole is opened on the hole wall of the plug-in hole; the outer periphery of the adjacent arch rib is detachably connected with a second auxiliary ring, the second auxiliary ring is wrapped around a part of the outer periphery of the rotating ring, a plug-in rod is fixed on the side surface of the second auxiliary ring close to the first auxiliary ring, the outer periphery of the plug-in rod is opened with a connecting hole, a first spring is fixed in the connecting hole, and a clamping ball is fixed on the end of the first spring away from the bottom of the connecting hole; the plug-in rod slides in the plug-in hole, and the clamping ball is clamped in the semicircular hole; the arch ribs can be aligned more easily by the first auxiliary ring and the second auxiliary ring, thereby improving the welding accuracy.

[0004] However, the arch rib welding device in the above application document has the following disadvantages: it is necessary to first open a slide groove on the surface of the arch rib, install a rotating ring in the slide groove, and then install an auxiliary ring on the outside. On the one hand, this solution makes the pre-produced auxiliary ring unable to adapt to arch ribs of different diameters, resulting in that all auxiliary structures need to be produced one by one according to the size of the arch rib. On the other hand, it increases the processing amount of the arch rib itself and reduces the production efficiency of the arch rib. For this reason, the present invention provides a welding device for assembling steel bridge arch ribs. Summary of the invention

[0005] The technical problem solved by the present invention is: the existing arch rib welding equipment, on the one hand, makes the pre-produced auxiliary ring unable to adapt to the arch ribs of different diameters, resulting in that all auxiliary structures need to be produced one by one according to the size of the arch rib; on the other hand, it increases the processing amount of the arch rib itself and reduces the production efficiency of the arch rib.

[0006] The present invention can be implemented through the following technical scheme: a welding device for assembling steel bridge arch ribs, comprising a base, a laser welding gun is arranged above the base, and a horizontal displacement limiting member and a vertical displacement limiting member of the arch rib are also arranged on the top of the base. The horizontal displacement limiting member of the arch rib includes an arch rib support seat, the length direction of the arch rib support seat is perpendicular to the axial direction of the arch rib, a semicircular notch is opened on the top of the arch rib support seat, and two positioning rods are symmetrically arranged on the inner wall of the semicircular notch in the circumferential direction; the arch rib fixing member includes a pressure plate pressed on the top surface of the arch rib.

[0007] A further technical improvement of the present invention is that the two positioning rods respectively penetrate and are slidably arranged on the two side walls of the arch rib support seat, and one end of each positioning rod away from the semicircular notch is fixedly connected to a No. 1 plate, and a spring is fixedly connected between the No. 1 plate and the arch rib support seat. The ends of the two positioning rods located in the semicircular notch are close to each other, and the distance between the two is less than the diameter of the arch rib.

[0008] A further technical improvement of the present invention is that a limiting plate is provided on the side of each No. 1 plate away from the arch rib support seat, and when the arch rib is placed in the semicircular notch, the limiting plate is driven to rest against the plate surface of the No. 1 plate away from the spring.

[0009] A further technical improvement of the present invention is that two side walls of the base are rotatably provided with double-headed threaded rods, both ends of which pass through the limit plates respectively; and two side walls of the base are also fixedly connected with guide rods, both ends of which pass through the limit plates respectively.

[0010] A further technical improvement of the present invention is that the pressure plate includes an arc-shaped plate for abutting the top surface of the arch rib, and the arc-shaped plate is connected with rectangular plates on both sides in the circumferential direction. Each of the rectangular plates is provided with a threaded hole, and the top of the base is also provided with a threaded hole. The fastening bolts pass through the threaded holes on the rectangular plates and are connected to the threaded holes on the top of the base.

[0011] A further technical improvement of the present invention is that: at least four arch rib support seats are provided, all of which are parallel to each other; two pressure plates are provided, and the two pressure plates are respectively provided above the two arch rib support seats located on both sides of the welding position.

[0012] A further technical improvement of the present invention is that two support rods are fixed on the top of the base, a support plate is fixed on the top of the two support rods, and the laser welding gun is arranged on one side of the support plate.

[0013] A further technical improvement of the present invention is that a cavity is provided inside the support plate, a semicircular through groove is provided on the surface of the support plate, and the semicircular through groove is connected to the cavity, a rod No. 1 is passed through and rollingly connected in the semicircular through groove, one end of the rod No. 1 is connected to a laser welding gun, and the other end is rotatably connected to a rod No. 2 which is perpendicular to the axis core of the rod No. 1, the rod No. 2 is connected to the output shaft of the motor, and the axis core of the output shaft of the motor coincides with the center of the semicircular through groove.

[0014] A further technical improvement of the present invention is that the No. 1 rod is sleeved in the cavity and fixedly connected with a first gear, and a second gear meshing with the first gear is also fixedly arranged in the cavity, and the size of the second gear is the same as that of the first gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, one end of the arch rib is hoisted into the semicircular notch at the top of the arch rib support seat, and two positioning rods make the arch rib located at the center of the semicircular notch, forming a restriction on the horizontal displacement of the arch rib, and then the pressure plate is pressed on the top of the arch rib to limit the vertical displacement of the arch rib, thereby fixing the arch rib, so that the welding surfaces of the arch rib can be tightly attached to each other, avoiding the phenomenon of misalignment of the welding surfaces, and ensuring the welding accuracy.

[0017] 2. In the present invention, after the two arch ribs are installed on the top of the base, the motor drives the No. 2 rod and the No. 1 rod to rotate. On the one hand, the No. 1 rod moves along the trajectory of the semicircular through groove. On the other hand, due to the meshing action of the first gear and the second gear, the first gear drives the No. 1 rod to rotate around its own axis, so that the welding head of the laser welding gun is always aligned with the part to be welded, ensuring the accuracy of the welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 A schematic diagram of the external structure of the present invention from another perspective;

[0021] Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A;

[0022] Figure 4 It is a side view of the arch rib support seat in the present invention;

[0023] Figure 5 It is a structural schematic diagram of the pressure plate in the present invention;

[0024] Figure 6 It is a cross-sectional view of the support plate in the present invention.

[0025] In the figure: 1. base; 2. laser welding gun; 3. arch rib support seat; 31. semicircular notch; 32. positioning rod; 33. plate No. 1; 34. spring; 35. double-headed threaded rod; 36. limit plate; 37. guide rod; 4. pressure plate; 41. arc plate; 42. rectangular plate; 5. fastening bolt; 6. support rod; 7. support plate; 8. semicircular through groove; 9. cavity; 10. rod No. 1; 11. rod No. 2; 12. first gear; 13. second gear. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0027] See also Figure 1-6 As shown, a welding device for assembling the arch rib of a steel bridge comprises a base 1, a laser welding gun 2 is arranged above the base 1, and a horizontal displacement limiting member and a vertical displacement limiting member of the arch rib are also arranged on the top of the base 1, wherein the horizontal displacement limiting member of the arch rib comprises an arch rib support seat 3, the length direction of the arch rib support seat 3 is perpendicular to the axial direction of the arch rib, a semicircular notch 31 is opened on the top of the arch rib support seat 3, and two positioning rods 32 are symmetrically arranged on the inner wall of the semicircular notch 31 in the circumferential direction; the arch rib fixing member comprises a pressing plate 4 pressed on the top surface of the arch rib; when working, one end of the arch rib is hoisted into the semicircular notch 31 on the top of the arch rib support seat 3, and the two positioning rods 32 make the arch rib located at the center position of the semicircular notch 31, forming a restriction on the horizontal displacement of the arch rib, and then the pressing plate 4 is pressed on the top of the arch rib to realize the restriction on the vertical displacement of the arch rib, thereby realizing the fixation of the arch rib, so that the welding surfaces of the arch rib can be tightly attached to each other, avoiding the phenomenon of misalignment of the welding surfaces, and ensuring the welding accuracy.

[0028] The two positioning rods 32 can realize automatic centering of the arch rib and limit the horizontal displacement of the arch rib. The specific structure of the positioning rods 32 is as follows: the two positioning rods 32 are respectively penetrated and slidably arranged on the two side walls of the arch rib support seat 3, and one end of each positioning rod 32 away from the semicircular notch 31 is fixedly connected to a No. 1 plate 33, and a spring 34 is fixedly connected between the No. 1 plate 33 and the arch rib support seat 3, and one end of the two positioning rods 32 located in the semicircular notch 31 is close to each other, and the distance between the two is less than the diameter of the arch rib; a limiting plate 36 is arranged on the side of each No. 1 plate 33 away from the arch rib support seat 3, and when the arch rib is placed in the semicircular notch 31, the limiting plate 36 is driven to abut against the plate surface of the No. 1 plate 33 away from the spring 34; double-headed threaded rods 35 are respectively rotatably arranged on the two side walls of the base 1, and the two ends of the double-headed threaded rods 35 respectively penetrate the limiting plates 36, and the two side walls of the base 1 are also respectively fixedly connected to guide rods 37, and the two ends of the guide rods 37 respectively penetrate the limiting plates 36;

[0029] When the above scheme is implemented, when one end of the arch rib is placed in the semicircular notch 31, the arch rib will push the two positioning rods 32 away from each other. When the bottom surface of the arch rib contacts the bottom surface of the semicircular notch 31, the double-headed threaded rod 35 is rotated so that the double-headed threaded rod 35 drives the two limiting plates 36 to move closer to the No. 1 plate 33, thereby making the two positioning rods 32 in the semicircular notch 31 of equal length, so that the arch rib is accurately positioned inside the semicircular notch 31. Due to the restriction of the limiting plate 36 on the No. 1 plate 33, the positioning rod 32 and the No. 1 plate 33 will not produce horizontal displacement under the extrusion of the arch rib, thereby realizing the restriction of the horizontal displacement of the arch rib.

[0030] As a preferred technical solution of the present invention, the pressure plate 4 includes an arc-shaped plate 41 for abutting against the top surface of the arch rib, and the arc-shaped plate 41 is connected to rectangular plates 42 on both sides in the circumferential direction, each of the rectangular plates 42 is provided with a threaded hole, and the top of the base 1 is also provided with a threaded hole, and the fastening bolt 5 passes through the threaded hole on the rectangular plate 42 and is connected to the threaded hole on the top of the base 1; when one end of the arch rib is placed in the semicircular notch 31, and the limit plate 36 is used to limit the horizontal displacement of the arch rib, the arc-shaped plate 41 on the pressure plate 4 is pressed against the top surface of the arch rib, and then the fastening bolt 5 is screwed into the threaded hole on the rectangular plate 42, and finally the bottom end of the fastening bolt 5 is screwed into the threaded hole on the top of the base 1, so that the pressure plate 4 is stably pressed against the top of the arch rib, thereby limiting the vertical displacement of the arch rib, and by fixing another arch rib on the base 1 in this way, and making the welding surfaces of the two arch ribs abut together, the welding of the two arch ribs can be completed.

[0031] Furthermore, at least four arch rib support seats 3 are provided, and all arch rib support seats 3 are parallel to each other. Two pressure plates 4 are provided, and the two pressure plates 4 are respectively arranged above the two arch rib support seats 3 located on both sides of the welding position. The arch rib support seats 3 and the pressure plates 4 are used in coordination to limit the horizontal and vertical displacement of the arch ribs.

[0032] In the present application, two support rods 6 are fixed on the top of the base 1, and a support plate 7 is fixedly connected to the top of the two support rods 6, and the laser welding gun 2 is arranged on one side of the support plate 7; a cavity 9 is arranged inside the support plate 7, and a semicircular through groove 8 is opened on the plate surface of the support plate 7, and the semicircular through groove 8 is connected with the cavity 9, and a rod 10 is passed through and rollingly connected in the semicircular through groove 8, one end of the rod 10 is connected to the laser welding gun 2, and the other end is rotatably connected to the rod 11 perpendicular to the axis of the rod 10, and the rod 11 is connected to the output shaft of the motor, and the axis core of the output shaft of the motor coincides with the center of the semicircular through groove 8; the rod 10 is sleeved in the cavity 9 and fixed with a first gear 12, and a second gear 13 meshing with the first gear 12 is also fixedly arranged in the cavity 9, and the size of the second gear 13 is the same as that of the first gear 12;

[0033] After the two arch ribs are installed on the top of the base 1, the motor is started, so that the motor drives the second rod 11 and the first rod 10 to rotate. On the one hand, the No. 1 rod 10 moves along the trajectory of the semicircular through groove 8. On the other hand, due to the meshing action of the first gear 12 and the second gear 13, the first gear 12 drives the No. 1 rod 10 to rotate around its own axis, so that the welding head of the laser welding gun 2 is always aligned with the part to be welded, ensuring the accuracy of the welding position.

[0034] When the present invention is in use, after one end of the arch rib is placed in the semicircular notch 31, the arch rib will push the two positioning rods 32 away from each other. When the bottom surface of the arch rib contacts the bottom surface of the semicircular notch 31, the double-headed threaded rod 35 is rotated so that the double-headed threaded rod 35 drives the two limiting plates 36 to move closer to the first plate 33, thereby making the two positioning rods 32 in the semicircular notch 31 of equal length, so that the arch rib is accurately positioned inside the semicircular notch 31. Due to the restriction of the limiting plate 36 on the first plate 33, the positioning rod 32 and the first plate 33 will not produce horizontal displacement under the extrusion of the arch rib, thereby achieving the restriction of the horizontal displacement of the arch rib; then, the arc plate 41 on the pressing plate 4 is pressed against the top surface of the arch rib, and the fastening bolts 5 are removed from the torque The threaded hole on the shaped plate 42 is screwed into, and finally the bottom end of the fastening bolt 5 is screwed into the threaded hole on the top of the base 1, so that the pressure plate 4 is stably pressed on the top of the arch rib, thereby realizing the limitation of the vertical displacement of the arch rib, and the other arch rib is also fixed to the base 1 in this way, and the welding surfaces of the two arch ribs are made close to each other; start the motor, so that the motor drives the second rod 11 and the first rod 10 to rotate, and the first rod 10 moves along the trajectory of the semicircular through groove 8 on the one hand, and on the other hand, due to the meshing action of the first gear 12 and the second gear 13, the first gear 12 drives the first rod 10 to rotate around its own axis, so that the welding head of the laser welding gun 2 is always aligned with the part to be welded, thereby ensuring the accuracy of the welding position.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A welding device for assembling steel bridge arch ribs, characterized in that: The invention comprises a base (1), a laser welding gun (2) is arranged above the base (1), and a rib horizontal displacement limiting member and a rib vertical displacement limiting member are also arranged on the top of the base (1), the rib horizontal displacement limiting member comprises a rib support seat (3), the length direction of the rib support seat (3) is perpendicular to the axial direction of the rib, a semicircular notch (31) is provided on the top of the rib support seat (3), and two positioning rods (32) are symmetrically arranged on the inner wall of the semicircular notch (31) in the circumferential direction; the rib fixing member comprises a pressure plate (4) pressed on the top surface of the rib.

2. A welding device for assembling steel bridge arch ribs according to claim 1, characterized in that: The two positioning rods (32) respectively penetrate and are slidably arranged on the two side walls of the arch rib support seat (3), one end of each positioning rod (32) away from the semicircular notch (31) is fixedly connected to a No. 1 plate (33), a spring (34) is fixedly connected between the No. 1 plate (33) and the arch rib support seat (3), and one end of the two positioning rods (32) located in the semicircular notch (31) is close to each other, and the distance between the two is less than the diameter of the arch rib.

3. The welding equipment for assembling the steel bridge arch rib according to claim 2, characterized in that: A limiting plate (36) is provided on one side of each of the first plates (33) away from the arch rib support seat (3); when the arch rib is placed in the semicircular notch (31), the limiting plate (36) is driven to abut against the plate surface of the first plate (33) on the side away from the spring (34).

4. The welding equipment for assembling the steel bridge arch rib according to claim 3, characterized in that: The two side walls of the base (1) are rotatably provided with double-headed threaded rods (35), and the two ends of the double-headed threaded rods (35) respectively penetrate the limit plates (36). The two side walls of the base (1) are also fixedly connected with guide rods (37), and the two ends of the guide rods (37) respectively penetrate the limit plates (36).

5. The welding equipment for assembling steel bridge arch ribs according to claim 1, characterized in that: The pressure plate (4) comprises an arc-shaped plate (41) for abutting against the top surface of the arch rib, and the arc-shaped plate (41) is connected to rectangular plates (42) on both sides in the circumferential direction, and each of the rectangular plates (42) is provided with a threaded hole, and the top of the base (1) is also provided with a threaded hole, and the fastening bolts (5) pass through the threaded holes on the rectangular plates (42) and are connected to the threaded holes on the top of the base (1).

6. The welding equipment for assembling steel bridge arch ribs according to claim 5, characterized in that: At least four arch rib support seats (3) are provided, and all the arch rib support seats (3) are parallel to each other. Two pressing plates (4) are provided, and the two pressing plates (4) are respectively arranged above the two arch rib support seats (3) located on both sides of the welding position.

7. The welding equipment for assembling steel bridge arch ribs according to claim 1, characterized in that: Two support rods (6) are fixed on the top of the base (1), a support plate (7) is fixed to the top of the two support rods (6), and the laser welding gun (2) is arranged on one side of the support plate (7).

8. The welding equipment for assembling the steel bridge arch rib according to claim 7, characterized in that: A cavity (9) is provided inside the support plate (7), a semicircular through groove (8) is provided on the plate surface of the support plate (7), and the semicircular through groove (8) is communicated with the cavity (9), a rod (10) passes through and is rotatably connected to the semicircular through groove (8), one end of the rod (10) is connected to the laser welding gun (2), and the other end is rotatably connected to a rod (11) perpendicular to the axis of the rod (10), the rod (11) is connected to the output shaft of the motor, and the axis of the output shaft of the motor coincides with the center of the semicircular through groove (8).

9. The welding equipment for assembling the steel bridge arch rib according to claim 8, characterized in that: The number one rod (10) is sleeved in the cavity (9) and fixedly connected to a first gear (12); a second gear (13) meshing with the first gear (12) is also fixedly arranged in the cavity (9); the size of the second gear (13) is the same as that of the first gear (12).

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