Automatic production device for U-shaped reinforcing mesh outside box girder

Abstract

The invention relates to an automatic production device for a U-shaped reinforcing mesh outside a box girder, and relates to the technical field of reinforcing steel bar machining, by arranging a bending assembly, straight bars are automatically bent on the horizontal plane of a workbench to form U-shaped reinforcing steel bars, machining of the U-shaped reinforcing steel bars is achieved, and meanwhile the safety of a user is guaranteed. Then a lifting rod in the bending assembly is used for achieving perpendicularity of the U-shaped steel bar and the workbench, the traction assembly is arranged for moving the longitudinal steel bar to the welding position, and accurate positioning of the longitudinal steel bar is achieved through a lock sleeve, an inserting hole, a limiting rod and a limiting hole; a lifting assembly and a clamping assembly in the welding assembly are used for achieving lifting of a U-shaped steel bar and accurate alignment lap joint of the U-shaped steel bar and a longitudinal steel bar, a second motor and a third air cylinder in the welding assembly are used for adjusting the position of a welding gun assembly, and a slant welding gun and a vertical welding gun in the welding gun assembly are used for welding and fixing a plurality of lap joint welding spots. Automatic control is achieved in the whole process, and the production efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel bar processing, in particular, especially relates to a box girder outer U-shaped steel bar mesh automatic production device. BACKGROUND

[0002] As a kind of efficient hollow section structure, box girder is widely used in long-span bridge construction by virtue of its excellent bending and torsional properties. The web and bottom plate of box girder usually adopt solid reinforced concrete structure, and high-density steel reinforcement framework needs to be configured inside to bear load. Among them, the outer U-shaped steel bar mesh as a key stressed component is welded / bound by U-shaped main reinforcement and longitudinal distribution reinforcement to form a stable spatial stress system, as shown in Figure 1

[0003] The processing of the steel bar mesh still highly depends on manual operation at present, and there are problems such as low work efficiency, poor quality consistency, and limited scale production.

[0004] In view of the above, there is an urgent need for a box girder outer U-shaped steel bar mesh automatic production device to solve the above problems. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a box girder outer U-shaped steel bar mesh automatic production device to solve the problems that the outer U-shaped steel bar mesh in the box girder in the existing construction can only be manually made by workers, the process is complicated, the efficiency is low, the consistency is poor, and continuous production is not possible, which is not suitable for large-scale production.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a box girder outer U-shaped steel bar mesh automatic production device, comprising a bending assembly, a welding assembly and a traction assembly; the bending assembly is arranged below the welding assembly, and the traction assembly is arranged on one side of the welding assembly; the bending assembly bends straight reinforcement into U-shaped reinforcement and delivers it to the welding assembly, the traction assembly pulls longitudinal reinforcement to the welding assembly, and the welding assembly welds the U-shaped reinforcement and the longitudinal reinforcement to form an outer U-shaped steel bar mesh.

[0007] The bending assembly comprises a workbench, a rotating shaft and a lifting rod, the rotating shaft is fixedly installed on the upper surface of the workbench, the lifting rod is movably installed on the upper surface of the workbench, and the lifting rod is arranged on one side of the rotating shaft.

[0008] The welding assembly comprises a support plate and a welding gun assembly, the support plate is provided with a limiting hole, the limiting hole is consistent with the position of the longitudinal reinforcement, and the welding gun assembly comprises an oblique welding gun and a vertical welding gun, the welding positions of the oblique welding gun and the vertical welding gun correspond to the limiting hole.

[0009] ​The support plate is fixedly installed on the second support frame, and the second support frame is arranged above the bending assembly; the second support frame comprises an inclined column, a first vertical column and a second vertical column, the inclined column is arranged on both sides of the middle part of the second support frame, the first vertical column is arranged on both sides of the end of the second support frame away from the traction assembly, and the second vertical column is between the two first vertical columns.

[0010] A second motor is fixedly installed on the second vertical column, a mounting plate is movably installed at the bottom of the second vertical column, the second motor drives the mounting plate to move, and an array of vertical welding guns is fixedly installed on the side of the mounting plate away from the second vertical column.

[0011] The inclined column is fixedly installed with the support plate, and a movable plate is movably installed on the side of the support plate away from the inclined column, and an inclined welding gun is fixedly installed on the movable plate.

[0012] A second sliding rail is arranged between the support plate and the movable plate, a third cylinder is fixedly installed on one side of the movable plate, and the third cylinder drives the movable plate to move along the second sliding rail.

[0013] A lifting assembly is installed on the first vertical column, the lifting assembly comprises a first cylinder, a first sliding rail, a connecting plate and a first connecting rod, the first cylinder and the first sliding rail are fixedly installed on the outer wall of the first vertical column, the output end of the first cylinder is fixedly connected with the first connecting rod, the lower portion of the first connecting rod is fixedly connected with the connecting plate, and the first cylinder drives the connecting plate to move along the first sliding rail.

[0014] A clamping assembly is installed on the connecting plate, and the clamping assembly comprises a fixed seat; the fixed seat is fixedly installed on the connecting plate, a plurality of second cylinders are arranged on the fixed seat, and the end of the plurality of second cylinders away from the fixed seat is fixedly connected with a second clamping block; the plurality of second clamping blocks clamp the upper portion, the middle portion and the lower portion of the U-shaped steel respectively, so that the U-shaped steel is stably clamped, and the movement of the U-shaped steel is realized in cooperation with the lifting assembly.

[0015] The traction assembly comprises a third support frame and a traction structure, the traction structure is movably installed on the third support frame, the traction structure comprises a support frame, the support frame is movably installed on the third support frame, and the support frame is installed with a mounting table at one end close to the welding assembly, and the mounting table is provided with a lock sleeve; the mounting table is installed with a positioning plate at one end close to the welding assembly, and the positioning plate is provided with a plug-in hole; the positioning plate is fixedly connected with a second connecting rod, one end of the second connecting rod away from the welding assembly is connected with a fourth cylinder, and the working of the fourth cylinder controls the distance between the positioning plate and the mounting table, thereby controlling the plug-in of the longitudinal steel into the lock sleeve through the plug-in hole, and realizing the accurate positioning and movement of the longitudinal steel.

[0016] The automatic production device for the U-shaped reinforcing mesh outside the box girder further comprises a limiting assembly, the limiting assembly is arranged on the side of the welding assembly away from the traction assembly, the limiting assembly comprises a fourth support frame and a limiting rod, the fourth support frame is installed on the horizontal ground, and the limiting rod is fixedly installed on the fourth support frame; the limiting rod is hollow, and the longitudinal steel is inserted into the limiting rod during use; and the limiting rod is arranged in correspondence with the position of the limiting hole.

[0017] As a preferred embodiment of the present application, the top of one side of the length direction of the workbench is fixedly installed with an inclined plate, and the upper side of the inclined plate is fixedly installed with a placing groove; one side of the inclined plate is installed with a second motor, and the output end of the second motor is installed with a blocking rod, which slows down the speed and impact force of the straight steel during the sliding process of the straight steel on the inclined plate; and the two ends of the length direction of the workbench are fixedly installed with symmetrically distributed top plates.

[0018] As a preferred embodiment of the present application, the shaft is installed with a file, and the baffle can ensure the accuracy of the position of the straight steel sliding on the inclined plate.

[0019] As a preferred embodiment of the present application, the lifting rod comprises a rotating rod, a first clamping block and a fixed plate, the fixed plate is fixedly installed on the workbench, the rotating rod is rotatably installed on the fixed plate, the rotating rod is fixedly installed with a connecting rod, and the connecting rod is installed with a first clamping block.

[0020] As a preferred embodiment of the present application, the top of the second support frame is fixedly installed with a limiting frame, the limiting frame is provided with a welding box, and the welding box is connected with the welding gun assembly in correspondence.

[0021] As a preferred embodiment of the present application, one side of the bending assembly is installed with a straightening assembly, the straightening assembly comprises a straightening machine, the lower side of the straightening machine is fixedly installed with a first support frame, and the first support frame is arranged on the ground.

[0022] As a preferred embodiment of the present application, the locking sleeve, the insertion hole and the limiting hole are arranged in position correspondence.

[0023] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0024] The box girder outer U-shaped steel bar mesh automatic production equipment provided by the present application realizes the automatic bending production of the U-shaped steel bar through the bending assembly, realizes the processing of the U-shaped steel bar, and ensures the safety of the user. The verticality of the U-shaped steel bar and the workbench is realized through the lifting rod in the bending assembly, the longitudinal steel bar is moved to the welding position through the traction assembly, the precise positioning of the longitudinal steel bar is realized through the locking sleeve, the insertion hole, the limiting rod and the limiting hole, the lifting and accurate alignment and lapping of the U-shaped steel bar and the longitudinal steel bar are realized through the lifting assembly and the clamping assembly in the welding assembly, the position of the welding gun assembly is adjusted through the second motor and the third cylinder in the welding assembly, the oblique welding gun and the vertical welding gun in the welding gun assembly are used to weld and fix a plurality of lapped welding points, and the outer U-shaped steel bar mesh with stable structure is formed. The whole process is automatically controlled, the production efficiency is high, manual intervention is avoided, the formed outer U-shaped steel bar mesh has good consistency and high strength, and is suitable for continuous mass production. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a perspective view of the outer U-shaped steel bar mesh in the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0026] Figure 2 FIG. 2 is a perspective view of the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0027] Figure 3 FIG. 3 is a front view of the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0028] Figure 4 FIG. 4 is a rear view of the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0029] Figure 5 FIG. 5 is a right view of the welding assembly in the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0030] Figure 6 FIG. 6 is a left view of the welding assembly in the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0031] Figure 7 FIG. 7 is a perspective view of the welding assembly in the box girder outer U-shaped steel bar mesh automatic production device of the present application;

[0032] Figure 8 It is a box girder outer U-shaped reinforcing mesh automatic production device of the present application and the schematic diagram of the three-dimensional structure of the traction structure;

[0033] Figure 9 It is a box girder outer U-shaped reinforcing mesh automatic production device of the present application and the schematic diagram of the rear view structure of the traction structure;

[0034] Figure 10 It is a box girder outer U-shaped reinforcing mesh automatic production device of the present application and the schematic diagram of the three-dimensional structure of the bending assembly;

[0035] Figure 11 It is a box girder outer U-shaped reinforcing mesh automatic production device of the present application and the schematic diagram of the three-dimensional structure of the lifting rod.

[0036] In the figure: 1, straightening assembly; 11, straightening machine; 12, first support frame; 2, bending assembly; 21, workbench; 211, placing groove; 212, inclined plate; 213, top plate; 22, first motor; 221, stop rod; 23, baffle; 24, rotating shaft; 25, lifting rod; 251, rotating rod; 252, first clamping block; 253, fixed plate; 254, connecting rod; 3, welding assembly; 31, second support frame; 311, inclined column; 312, first vertical column; 313, support plate; 314, second vertical column; 315, mounting plate; 316, limiting hole; 317, second motor; 318, movable plate; 32, welding gun assembly; 321, inclined welding gun; 322, vertical welding gun; 33, lifting assembly; 331, first air cylinder; 332, first sliding rail; 333, connecting plate; 334, first connecting rod; 34, clamping assembly; 341, fixed seat; 342, second air cylinder; 343, second clamping block; 35, third air cylinder; 36, second sliding rail; 37, limiting frame; 39, welding box; 4, U-shaped reinforcing bar; 5, longitudinal reinforcing bar; 6, traction assembly; 61, third support frame; 62, traction structure; 621, support frame; 622, mounting table; 623, lock sleeve; 624, second connecting rod; 625, positioning plate; 626, plug-in hole; 627, fourth air cylinder; 7, limiting assembly; 71, fourth support frame; 72, limiting rod; 8, straight reinforcing bar. DETAILED DESCRIPTION

[0037] First of all, it should be pointed out that in the different described embodiments, the same components are provided with the same reference signs or the same component names, wherein the disclosure contained in the entire specification can be transferred to the same components with the same reference signs or the same component names in terms of meaning. The selected position indications in the specification, such as upper, lower, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in terms of meaning when the position changes.

[0038] Example one:

[0039] An automatic production device for box girder outer U-shaped reinforcement net is used for bending and welding of steel bars to realize preparation of outer U-shaped reinforcement net. Figure 1 As shown in the figure, the outer U-shaped reinforcement net is prepared by welding of U-shaped steel bars 4 and longitudinal steel bars 5.

[0040] Please refer to Figures 2-11 , which comprises a bending assembly 2, a welding assembly 3, a traction assembly 6 and a limiting assembly 7. The device realizes automatic control in the whole process and has high production efficiency. At the same time, manual intervention is avoided, the formed outer U-shaped reinforcement net has good consistency and high strength, and is suitable for continuous mass production.

[0041] As shown in the figure, Figures 2-4 The bending assembly 2 is arranged below the welding assembly 3, and the traction assembly 6 is arranged on one side of the welding assembly 3. In use, the bending assembly 2 bends straight bars 8 into U-shaped steel bars 4 and delivers them to the welding assembly 3, the traction assembly 6 pulls longitudinal steel bars 5 to the welding assembly 3, and the welding assembly 3 welds the U-shaped steel bars 4 and the longitudinal steel bars 5 to form an outer U-shaped reinforcement net.

[0042] In order to ensure the accuracy of the position of the straight bar 8 sliding down the inclined plate 212, as shown in the figure, Figure 10 The rotating shaft 24 in the bending assembly 2 is fixedly installed on the upper surface of the workbench 21, the lifting rod 25 is movably installed on the upper surface of the workbench 21, and the lifting rod 25 is arranged on one side of the rotating shaft 24. The top of one side of the workbench 21 in the length direction is fixedly installed with an inclined plate 212, and the upper side of the inclined plate 212 is fixedly installed with a placing groove 211. One side of the inclined plate 212 is installed with a second motor 22, and the output end of the second motor 22 is installed with a blocking rod 221 to slow down the speed and impact force during the sliding of the straight bar 8 through the inclined plate 212. The two ends of the workbench 21 in the length direction are fixedly installed with symmetrically distributed top plates 213. The rotating shaft 24 is installed with a baffle 23.

[0043] As shown in the figure, Figure 11 The lifting rod 25 is provided with a rotating rod 251, a first clamping block 252 and a fixed plate 253. The fixed plate 253 is fixedly installed on the workbench 21, the rotating rod 251 is rotatably installed on the fixed plate 253, the rotating rod 251 is fixedly installed with a connecting rod 254, and the connecting rod 254 is installed with the first clamping block 252.

[0044] As shown in the figure, Figure 7 The welding assembly 3 is provided with a supporting plate 313 and a welding gun assembly 32.

[0045] In order to ensure the accuracy of the welding position, as shown in the figure, Figure 6As shown, the support plate 313 is provided with a limiting hole 316, which is consistent with the position of the longitudinal reinforcing bar 5. The welding gun assembly 32 is provided with an oblique welding gun 321 and a vertical welding gun 322, and the welding positions of the oblique welding gun 321 and the vertical welding gun 322 correspond to the limiting hole 316.

[0046] like Figure 4 As shown, the support plate 313 is fixedly installed on the second support frame 31, which is located above the bending assembly 2;

[0047] like Figure 7 As shown, the second support frame 31 is provided with inclined columns 311, first vertical columns 312 and second vertical columns 314. The inclined columns 311 are located on both sides of the middle part of the second support frame 31. The first vertical columns 312 are located on both sides of the end of the second support frame 31 away from the traction component 6. The second vertical column 314 is located between the two first vertical columns 312.

[0048] like Figure 7 As shown, a second motor 317 is fixedly installed on the second vertical column 314, and an mounting plate 315 is movably installed at the bottom of the second vertical column 314. The operation of the second motor 317 drives the mounting plate 315 to move. An array of vertical welding guns 322 are fixedly installed on the side of the mounting plate 315 away from the second vertical column 314.

[0049] like Figure 6 As shown, the support plate 313 is fixedly installed on the inclined column 311, and a movable plate 318 is movably installed on the side of the support plate 313 away from the inclined column 311. An inclined welding gun 321 is fixedly installed on the movable plate 318.

[0050] like Figure 7 As shown, a second slide rail 36 is provided between the support plate 313 and the movable plate 318. A third cylinder 35 is fixedly installed on one side of the movable plate 318. The operation of the third cylinder 35 drives the movable plate 318 to move along the second slide rail 36.

[0051] like Figure 5 As shown, a lifting assembly 33 is installed on the first vertical column 312. The lifting assembly 33 is provided with a first cylinder 331, a first slide rail 332, a connecting plate 333, and a first connecting rod 334. The first cylinder 331 and the first slide rail 332 are fixedly installed on the outer wall of the first vertical column 312. The output end of the first cylinder 331 is fixedly connected to the first connecting rod 334. The connecting plate 333 is fixedly connected below the first connecting rod 334. The operation of the first cylinder 331 drives the connecting plate 333 to move along the first slide rail 332.

[0052] As shown in Figure 6 The connecting plate 333 is provided with a clamping assembly 34, the clamping assembly 34 is provided with a fixing seat 341; the fixing seat 341 is fixedly installed on the connecting plate 333, a plurality of second air cylinders 342 are arranged on the fixing seat 341; a second clamping block 343 is fixedly connected to one end of the second air cylinder 342 away from the fixing seat 341; a plurality of second clamping blocks 343 clamp the upper, middle and lower parts of the U-shaped steel bar 4 respectively, so that the U-shaped steel bar 4 is stably clamped, and the movement of the U-shaped steel bar 4 is realized in cooperation with the lifting assembly 33.

[0053] As shown in Figure 8 The traction assembly 6 is provided with a third support frame 61 and a traction structure 62, the traction structure 62 is movably installed on the third support frame 61, the traction structure 62 is provided with a support frame 621, the support frame 621 is movably installed on the third support frame 61, an installation table 622 is installed on one end of the support frame 621 close to the welding assembly 3, and a lock sleeve 623 is arranged on the installation table 622; a positioning plate 625 is installed on one end of the installation table 622 close to the welding assembly 3, and a plug-in hole 626 is arranged on the positioning plate 625; the lock sleeve 623, the plug-in hole 626 and the limiting hole 316 are arranged in position correspondence; the positioning plate 625 is fixedly connected with a second connecting rod 624;

[0054] As shown in Figure 9 The second connecting rod 624 is connected with a fourth air cylinder 627 at one end away from the welding assembly 3, the working of the fourth air cylinder 627 controls the distance between the positioning plate 625 and the installation table 622, thereby controlling the plug-in of the longitudinal steel bar 5 into the lock sleeve 623 through the plug-in hole 626, and realizing the accurate positioning and movement of the longitudinal steel bar 5.

[0055] As shown in Figure 3 The limiting assembly 7 is arranged on the side of the welding assembly 3 away from the traction assembly 6, the limiting assembly 7 is provided with a fourth support frame 71 and a limiting rod 72, the fourth support frame 71 is installed on the horizontal ground, the limiting rod 72 is fixedly installed on the fourth support frame 71, the limiting rod 72 is hollow, and the longitudinal steel bar 5 is inserted into the inside of the limiting rod 72 during use, and the limiting rod 72 is arranged in position correspondence with the limiting hole 316.

[0056] As shown in Figure 1 The top of the second support frame 31 is fixedly installed with a limiting frame 37, a welding box 39 is arranged in the limiting frame 37, the welding box 39 is connected with the welding gun assembly 32 in correspondence, so as to ensure the reasonable use of the three-dimensional space, and the use of the limiting frame 37 ensures the safety of the user.

[0057] AsFigure 2 As shown, the straightening assembly 1 is installed on one side of the bending assembly 2, and the straightening assembly 1 is provided with a straightening machine 11, and a first support frame 12 is fixedly installed below the straightening machine 11, and the first support frame 12 is arranged on the ground.

[0058] When the box girder outer U-shaped reinforcement mesh automatic production equipment is used, the straight reinforcement 8 is automatically bent to form the U-shaped reinforcement 4 on the horizontal plane of the workbench 21, which realizes the processing of the U-shaped reinforcement 4 and ensures the safety of the user; the U-shaped reinforcement 4 is rotated by using the lifting rod 25 in the bending assembly 2 to realize the verticality with the workbench 21, the longitudinal reinforcement 5 is moved to the welding position by using the traction assembly 6, the precise positioning of the longitudinal reinforcement 5 is realized by using the lock sleeve 623, the plug-in hole 626, the limiting rod 72 and the limiting hole 316, the lifting and accurate positioning of the U-shaped reinforcement 4 and the longitudinal reinforcement 5 are realized by using the lifting assembly 33 and the clamping assembly 34 in the welding assembly 3, the position of the welding gun assembly 32 is adjusted by using the second motor 317 and the third cylinder 35 in the welding assembly 3, the plurality of lap joints are welded and fixed by using the oblique welding gun 321 and the vertical welding gun 322 in the welding gun assembly 32, and the outer U-shaped reinforcement mesh with stable structure is formed.

[0059] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that there is any such actual relationship or order between these entities or actions. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0060] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A box girder outer U-shaped reinforcement mesh automated production device for preparing an outer U-shaped reinforcement mesh prepared by welding a U-shaped reinforcement (4) and a longitudinal reinforcement (5); characterized in that, It includes bending assembly (2), welding assembly (3) and traction assembly (6);The bending assembly (2) is arranged below the welding assembly (3), and the traction assembly (6) is arranged on one side of the welding assembly (3);The bending assembly (2) bends straight reinforcement (8) to form U-shaped reinforcement (4) and is transmitted to welding assembly (3), the traction assembly (6) pulls longitudinal reinforcement (5) to welding assembly (3), and welding assembly (3) welds the U-shaped reinforcement (4) with the longitudinal reinforcement (5) to form outer U-shaped reinforcement net.

2. The automatic production device for the outer U-shaped steel bar net of a box girder according to claim 1, characterized in that: The bending assembly (2) includes a workbench (21), a rotating shaft (24) and a lifting rod (25), the rotating shaft (24) is fixedly installed on the upper surface of the workbench (21), and the lifting rod (25) is movably installed on the upper surface of the workbench (21), and the lifting rod (25) is arranged on one side of the rotating shaft (24).

3. The automatic production device for the outer U-shaped steel bar net of the box girder according to claim 1, characterized in that: The welding assembly (3) includes a support plate (313) and a welding gun assembly (32), the support plate (313) is provided with a limiting hole (316), and the limiting hole (316) is consistent with the position of the longitudinal reinforcement (5).

4. The automatic production device for the outer U-shaped steel bar net of the box girder according to claim 3, characterized in that: The welding gun assembly (32) includes an inclined welding gun (321) and a vertical welding gun (322), and the welding positions of the inclined welding gun (321) and the vertical welding gun (322) correspond to the limiting hole (316).

5. The automatic production device for the outer U-shaped steel bar net of the box girder according to claim 4, characterized in that: The support plate (313) is fixedly installed on the second support frame (31), and the second support frame (31) is arranged above the bending assembly (2);The second support frame (31) includes an inclined column (311), a first vertical column (312) and a second vertical column (314).

6. The automatic production device for the outer U-shaped steel bar net of a box girder according to claim 5, characterized in that: The second vertical column (314) is fixedly installed with a second motor (317), and the bottom of the second vertical column (314) is movably installed with a mounting plate (315), the second motor (317) drives the mounting plate (315) to move, and the mounting plate (315) is fixedly installed with an array of vertical welding guns (322) on the side away from the second vertical column (314).

7. The automatic production device for the outer U-shaped steel bar net of the box girder according to claim 5, characterized in that: The inclined column (311) is fixedly installed with the support plate (313), and the side, away from the inclined column (311), of the support plate (313) is movably installed with a movable plate (318), and the movable plate (318) is fixedly installed with an inclined welding gun (321).

8. The automatic production device for the outer U-shaped steel bar net of a box girder according to claim 5, characterized in that: The first vertical column (312) is installed with a lifting assembly (33), and the lifting assembly (33) includes a connecting plate (333), the connecting plate (333) is installed with a clamping assembly (34), and the clamping assembly (34) includes a fixed seat (341);The fixed seat (341) is fixedly installed on the connecting plate (333), a plurality of second air cylinders (342) are arranged on the fixed seat (341), one end of each of the plurality of second air cylinders (342) is fixedly connected with a second clamping block (343), and the plurality of second clamping blocks (343) clamp the upper part, the middle part and the lower part of the U-shaped reinforcement (4) respectively.

9. The automatic production device for the outer U-shaped steel bar net of a box girder according to claim 1, characterized in that: The traction assembly (6) comprises a third support frame (61) and a traction structure (62), the traction structure (62) is movably installed on the third support frame (61), the traction structure (62) comprises a support frame (621), the support frame (621) is movably installed on the third support frame (61), one end of the support frame (621) close to the welding assembly (3) is provided with a mounting table (622), the mounting table (622) is provided with a lock sleeve (623); one end of the mounting table (622) close to the welding assembly (3) is provided with a positioning plate (625), the positioning plate (625) is provided with a plug hole (626); the positioning plate (625) is fixedly connected with a second connecting rod (624), one end of the second connecting rod (624) away from the welding assembly (3) is connected with a fourth air cylinder (627).

10. The automatic production device for the outer U-shaped steel bar net of a box girder according to claim 3, characterized in that: The box girder outer U-shaped reinforcement mesh automatic production device further comprises a limiting assembly (7), the limiting assembly (7) is arranged on the side, away from the traction assembly (6), of the welding assembly (3), the limiting assembly (7) comprises a fourth support frame (71) and a limiting rod (72), the fourth support frame (71) is installed on the horizontal ground, the limiting rod (72) is fixedly installed on the fourth support frame (71), the limiting rod (72) is hollow, and a longitudinal steel bar (5) is inserted into the limiting rod (72) during use, and the limiting rod (72) is arranged in position correspondence with the limiting hole (316).

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