Positioning tool system of automatic welding production line for segment main reinforcement assembly

By using the positioning fixture system of the automated welding production line for the main reinforcement assembly of the tunnel segment, the coaxial positioning and deformation correction of the outer and inner arc main reinforcements are achieved by combining inner and outer arc limiting blocks and limiting plates. This solves the problem of positional deviation caused by manual binding and improves welding quality and production efficiency.

CN119115371BActive Publication Date: 2026-02-06CCCC THIRD HARBOR ENGINEERING CO LTD
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Patent Information

Application Number
CN202411392849.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-08
Publication Date
2026-02-06
Estimated Expiration
2044-10-08

AI Technical Summary

Technical Problem

In the existing technology, the preparation of the segment reinforcement cage relies on manual binding, which leads to large positional deviations when welding the outer and inner main reinforcement bars, resulting in poor welding effect and reducing the forming quality of the segment reinforcement cage.

Method used

The positioning tooling system of the automated welding production line for the main reinforcement assembly of the pipe segment includes a mounting support, a rotating platform and a positioning mechanism. It uses a combination of inner arc limiting blocks, inner arc limiting plates, outer arc limiting blocks and outer arc limiting plates for clamping. The drive assembly realizes the coaxial positioning and deformation correction of the inner and outer arc main reinforcements, and is equipped with a positioning assembly to fix the connecting reinforcement.

Benefits of technology

It improves the positioning accuracy and ease of operation between the outer and inner main reinforcement bars, ensures welding quality, reduces labor intensity and manufacturing costs, and adapts to the needs of steel reinforcement cages for pipe segments of different thicknesses.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to the technical field of building and civil engineering, and provides a positioning tool system of a segment main reinforcement assembly automatic welding production line, which comprises a mounting support, a rotary platform and a positioning mechanism, the rotary platform is rotationally connected to the mounting support, and the positioning mechanism is arranged on the rotary platform; the positioning mechanism comprises inner-arc limiting blocks, inner-arc limiting plates, outer-arc limiting blocks and outer-arc limiting plates, the inner-arc limiting blocks and the outer-arc limiting blocks are arranged on the rotary platform, the inner-arc limiting plates and the outer-arc limiting plates are slidingly arranged on the rotary platform, an inner-arc channel is formed between the multiple inner-arc limiting blocks and the multiple inner-arc limiting plates, an outer-arc channel is formed between the multiple outer-arc limiting blocks and the multiple outer-arc limiting plates, and the inner-arc channel and the outer-arc channel are coaxially arranged; and the mounting support is provided with a driving assembly. The positioning tool system of the segment main reinforcement assembly automatic welding production line can improve the positioning precision between outer-arc main reinforcements and inner-arc main reinforcements.
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Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building and civil engineering, in particular to a positioning tool system of a segment main reinforcement assembly automatic welding production line. BACKGROUND

[0002] The segment reinforcement cage refers to a steel reinforcement structure embedded in the concrete of a segment (a prefabricated component used in tunnel, pipeline and other engineering projects) to enhance the structural strength and stability of the segment. This reinforcement cage is usually composed of multiple steel bars combined in a specific design and layout, forming an overall support structure. During the production process of the segment, the reinforcement cage is pre-manufactured and placed in the mold, then the concrete is poured, and after the concrete solidifies, the segment with the reinforced reinforcement cage is formed. This structure can effectively improve the carrying capacity, crack resistance and durability of the segment.

[0003] REFERENCE Figure 1 、 Figure 2 In the prior art, the segment reinforcement cage mainly includes outer arc main reinforcement 82, inner arc main reinforcement 81, tie reinforcement 83, hoop reinforcement, hand hole spiral reinforcement, corner reinforcement and other auxiliary reinforcement, wherein the tie reinforcement 83 is installed between the inner arc main reinforcement 81 and the outer arc main reinforcement 82 and is arranged at intervals along the arc of the inner arc main reinforcement 81. The inner arc main reinforcement 81, the outer arc main reinforcement 82 and the plurality of tie reinforcements 83 are combined to form a main reinforcement assembly 8, and the plurality of main reinforcement assemblies 8 are connected in series by the hoop reinforcement and other auxiliary reinforcement to form a segment reinforcement cage.

[0004] However, such segment reinforcement cages rely too much on manual preparation, and manual binding and fixing are required on the membrane rack. The process is time-consuming and labor-intensive, and the labor intensity is high. Especially during the preparation of the main reinforcement assembly, since the outer arc main reinforcement and the inner arc main reinforcement are both long arc-shaped structures, manual alignment between the outer arc main reinforcement and the inner arc main reinforcement is prone to positional deviation (the main reason for the deviation is that the virtual center line of the outer arc main reinforcement does not coincide with the virtual center line of the inner arc main reinforcement, or the inner and outer arc main reinforcements are deformed, etc.), which makes it difficult to weld the tie reinforcement between the outer arc main reinforcement and the inner arc main reinforcement, and the welding effect is poor, reducing the overall forming quality of the segment reinforcement cage. SUMMARY

[0005] In order to improve the positioning accuracy between the outer arc main reinforcement and the inner arc main reinforcement, the application provides a positioning tool system of a segment main reinforcement assembly automatic welding production line.

[0006] The positioning tool system of the segment main reinforcement assembly automatic welding production line provided by the application adopts the following technical scheme:

[0007] The positioning tool system of the automatic welding production line of the segment main reinforcement assembly body comprises a mounting support, a rotating platform and a positioning mechanism, the rotating platform is rotationally connected to the mounting support, and the positioning mechanism is arranged on the rotating platform; the positioning mechanism comprises inner-arc limiting blocks, an inner-arc limiting plate, outer-arc limiting blocks and an outer-arc limiting plate, the inner-arc limiting blocks and the outer-arc limiting blocks are both arranged on the rotating platform and are spaced apart from each other around the central axis of the rotating platform, the inner-arc limiting plate and the outer-arc limiting plate are both slidingly arranged on the rotating platform, the number of the inner-arc limiting blocks corresponds to the number of the inner-arc limiting plate, and the number of the outer-arc limiting blocks corresponds to the number of the outer-arc limiting plate, an inner-arc channel for clamping the inner-arc main reinforcement is formed between the inner-arc limiting blocks and the inner-arc limiting plate, an outer-arc channel for clamping the outer-arc main reinforcement is formed between the outer-arc limiting blocks and the outer-arc limiting plate, and the inner-arc channel and the outer-arc channel are coaxially arranged; the mounting support is provided with a driving assembly, and the driving assembly is used to drive the inner-arc limiting plate and the outer-arc limiting plate to displace so as to clamp and fix the inner-arc main reinforcement or the outer-arc main reinforcement.

[0008] By adopting the technical scheme, the inner-arc limiting blocks, the inner-arc limiting plate, the outer-arc limiting blocks and the outer-arc limiting plate are arranged, the inner-arc channel is formed between the inner-arc limiting blocks and the inner-arc limiting plate, the outer-arc channel is formed between the outer-arc limiting blocks and the outer-arc limiting plate, the inner-arc main reinforcement is placed in the inner-arc channel and the outer-arc main reinforcement is placed in the outer-arc channel when the main reinforcement assembly is prepared, the inner-arc limiting plate and the outer-arc limiting plate are driven to displace by the driving assembly, the inner-arc limiting blocks and the inner-arc limiting plate can jointly clamp the inner-arc main reinforcement, and the outer-arc limiting blocks and the outer-arc limiting plate can jointly clamp the outer-arc main reinforcement, so that the inner-arc main reinforcement and the outer-arc main reinforcement are clamped and fixed, the inner-arc main reinforcement and the outer-arc main reinforcement can be quickly kept coaxial, and the positioning accuracy between the outer-arc main reinforcement and the inner-arc main reinforcement is improved. In addition, taking the inner-arc main reinforcement as an example, if the inner-arc main reinforcement is deformed, the inner-arc main reinforcement can be corrected to restore the curvature after the inner-arc main reinforcement is clamped and fixed by the combination of the inner-arc limiting blocks and the inner-arc limiting plate, and then the installation of the connecting reinforcement between the inner-arc main reinforcement and the outer-arc main reinforcement is facilitated.

[0009] Optionally, the driving assembly comprises a first cylinder, a second cylinder and a third cylinder, the cylinder body of the first cylinder is arranged on the mounting support, the piston rod of the first cylinder is connected to the inner-arc limiting plate to drive the inner-arc limiting plate to approach or move away from the corresponding inner-arc limiting block, the second cylinder is arranged on the mounting support, the piston rod of the second cylinder is connected with a lifting plate, the cylinder body of the third cylinder is arranged on the lifting plate, the piston rod of the third cylinder is connected to the outer-arc limiting plate to drive the outer-arc limiting plate to approach or move away from the corresponding outer-arc limiting block, and the rotating platform is provided with an avoiding groove for lifting of the third cylinder.

[0010] By adopting the technical scheme, after the inner arc main reinforcement is placed in the inner arc channel and the outer arc main reinforcement is placed in the outer arc channel, the piston rod of the first cylinder is driven to be pushed out, the inner arc limiting plate is forced to move towards the inner arc limiting block, the inner arc channel is reduced, and the inner arc limiting block and the inner arc limiting plate are clamped together on the inner arc main reinforcement; at the same time, the third cylinder is lifted by the second cylinder, the outer arc limiting plate passes through the avoiding groove and is lifted to the same flatness as the outer arc limiting block, the piston rod of the third cylinder is driven to be pushed out, the outer arc limiting plate is forced to move towards the outer arc limiting block, the outer arc channel is reduced, and the outer arc limiting block and the outer arc limiting plate are clamped together on the outer arc main reinforcement, thereby improving the positioning convenience between the inner arc main reinforcement and the outer arc main reinforcement.

[0011] Optionally, the driving assembly comprises a first cylinder, a connecting strip and a reset spring, the cylinder body of the first cylinder is arranged on the mounting support, the piston rod of the first cylinder is directed towards the inner arc limiting plate for pushing the inner arc limiting plate to move towards the corresponding inner arc limiting block, the connecting strip is slidably connected to the rotating platform, the inner arc limiting plate and the outer arc limiting plate are both connected to the connecting strip, and the reset spring is arranged between the connecting strip and the rotating platform, and the reset spring normally moves the connecting strip towards the side close to the first cylinder to expand the inner arc channel or the outer arc channel.

[0012] By adopting the technical scheme, through the arrangement of the first cylinder, the connecting strip and the reset spring, the connecting strip connects the inner arc limiting plate and the outer arc limiting plate together, so that the inner arc limiting plate and the outer arc limiting plate are integrated; when the inner arc main reinforcement is placed in the inner arc channel and the outer arc main reinforcement is placed in the outer arc channel, the piston rod of the first cylinder is driven to be pushed out, the inner arc limiting plate and the outer arc limiting plate are synchronously moved, so that the inner arc channel and the outer arc channel are simultaneously reduced, and then the inner arc main reinforcement and the outer arc main reinforcement are clamped and fixed at the same time, thereby improving the operation convenience of the overall structure and reducing the manufacturing cost.

[0013] Optionally, the number of the inner arc limiting blocks and the outer arc limiting blocks is correspondingly arranged, the surface of the rotating platform is provided with a moving groove, and the outer arc limiting block is slidably arranged in the moving groove; the rotating platform is provided with an adjusting assembly, and the adjusting assembly is used for driving the outer arc limiting block to move to be close to or away from the corresponding inner arc limiting block.

[0014] By adopting the technical scheme, through the arrangement of the adjusting assembly, when the distance between the inner arc main reinforcement and the outer arc main reinforcement needs to be controlled (different thickness of the pipe piece needs different thickness of the pipe piece reinforcement), the adjusting assembly is used to force the outer arc limiting block to move along the moving groove, so that the outer arc limiting block is close to or away from the corresponding inner arc limiting block, thereby adjusting the distance between the inner arc main reinforcement and the outer arc main reinforcement, so that different thickness of the pipe piece reinforcement can be prepared, and the adaptability of the overall structure is improved.

[0015] Optionally, the rotating platform has a positioning area between the inner arc main reinforcement and the outer arc main reinforcement, and the positioning area is provided with a positioning assembly for positioning the connecting reinforcement.

[0016] By adopting the above technical scheme, the positioning assembly is used for positioning the connecting reinforcement, so that when the inner arc main reinforcement and the outer arc main reinforcement are clamped and fixed, the two ends of the connecting reinforcement can be respectively connected to the inner arc main reinforcement and the outer arc main reinforcement, thereby facilitating the subsequent welding process.

[0017] Optionally, the positioning assembly comprises two clamping pieces, the clamping pieces are elastically arranged, one side of each of the two clamping pieces is connected to the surface of the rotating platform, a clamping channel for clamping the connecting reinforcement is formed between the two clamping pieces, each clamping piece is provided with a folding piece on the side away from the rotating platform, a guide channel connected to the clamping channel is formed between the two folding pieces, and the guide channel gradually decreases from the end away from the clamping channel to the end close to the clamping channel.

[0018] By adopting the above technical scheme, the clamping pieces are elastically arranged, when the connecting reinforcement is installed, the connecting reinforcement is aligned with the guide channel and pushed, so that the connecting reinforcement pushes away the two clamping pieces and enters the clamping channel, and the elastic restoring force of the two clamping pieces can clamp and fix the connecting reinforcement, so that the connecting reinforcement can be fixed at a set position for connecting the inner arc main reinforcement and the outer arc main reinforcement.

[0019] Optionally, the positioning area is provided with a positioning seat, the positioning assembly comprises a positioning block, positioning rods, an abutting spring and a linkage, the positioning block is slidably installed on the positioning seat to be able to be lifted, two positioning rods are provided, the two positioning rods are hingedly connected to the positioning seat and symmetrically distributed on the two sides of the positioning block, the two sides of the positioning block each have a first guide surface, the two first guide surfaces are correspondingly arranged with the two positioning rods, the two ends of the abutting spring are connected to the two positioning rods, the abutting spring normally makes one end of each of the two positioning rods abut against the corresponding first guide surface of the positioning block, when the positioning block is lifted and abuts against the peripheral wall of the connecting reinforcement, the positioning block pushes the two positioning rods to rotate, and one end of each of the two positioning rods away from the abutting spring abuts against the peripheral wall of the connecting reinforcement; the linkage is arranged between the positioning block and the connecting strip, and when the connecting strip moves away from the first cylinder, the linkage forces the positioning block to be lifted.

[0020] By adopting the above technical scheme, by arranging the positioning block, the positioning rods, the abutting spring and the linkage, when the first cylinder drives the connecting strip to move to clamp and fix the inner arc main reinforcement and the outer arc main reinforcement, the positioning block can be lifted under the action of the linkage and drive the two positioning rods to swing under the action of the first guide surface, so that the positioning block and the two positioning rods can abut against the peripheral wall of the connecting reinforcement, thereby positioning the connecting reinforcement.

[0021] Optionally, the linkage comprises a pushing block, a pushing frame and a lifting bar, the pushing block is connected to the upper surface of the connecting strip, the pushing frame is slidingly installed on the rotary platform, and the positioning block is connected to the pushing frame; one end of the lifting bar is connected to the pushing frame, and the bottom of the lifting bar has a second guide surface for abutting against the pushing block; when the connecting strip moves away from the first air cylinder, the pushing block forces the lifting bar to lift through the second guide surface.

[0022] By adopting the above technical scheme, through the setting of the pushing block, the pushing frame and the lifting bar, the connecting strip drives the pushing block to displace during movement, the pushing block pushes the lifting bar to lift a certain distance through the second guide surface, thereby driving the positioning block to lift a certain distance, so that the positioning block and the two positioning rods can be clamped together on the contact bar, improving the convenience of positioning the contact bar.

[0023] Optionally, a thickening piece is detachably installed between the pushing block and the connecting strip, and a connecting piece is arranged between the pushing block and the connecting strip, and the pushing block is detachably installed on the connecting strip through the connecting piece.

[0024] By adopting the above technical scheme, through the setting of the thickening piece, the lifting distance of the lifting bar can be changed by arranging the thickening piece between the pushing block and the connecting strip, and the lifting distance of the positioning block is changed accordingly, according to the actual needs of the lifting distance of the positioning block, different numbers of thickening pieces are selected for installation, so that the positioning block and the two positioning rods can be used to clamp contact bars of different diameters, greatly improving the applicability of the overall structure.

[0025] Optionally, a first roller is rotatably installed on the top wall of the positioning block, and a second roller is rotatably installed on the end of each of the two positioning rods away from the positioning block, the first roller and the two second rollers abut against the peripheral wall of the contact bar and can roll along the length direction of the contact bar; when the first roller and the two second rollers abut against the peripheral wall of the contact bar, the first roller and the two second rollers are arranged in a triangular arrangement around the central axis of the contact bar.

[0026] By adopting the above technical scheme, through the setting of the first roller and the two second rollers, the first roller and the two second rollers are arranged in a triangular arrangement around the central axis of the contact bar, improving the clamping effect on the contact bar; when the first cylinder drives the connecting strip to move to clamp and fix the inner arc main bar and the outer arc main bar, the position of the inner arc main bar and the outer arc main bar changes, at this time, a certain pushing force or pulling force can be applied to the contact bar to make it adaptively displace along its own axial direction; the setting of the first roller and the two second rollers can reduce the frictional resistance when the contact bar displaces, improving the smoothness of the displacement of the contact bar along its own axial direction.

[0027] To sum up, the present application includes at least one of the following beneficial technical effects:

[0028] 1. By setting the inner arc limiting block, the inner arc limiting plate, the outer arc limiting block and the outer arc limiting plate, the inner arc limiting block and the inner arc limiting plate form an inner arc, and the outer arc limiting block and the outer arc limiting plate form an outer arc. When preparing the main reinforcement assembly, the inner arc main reinforcement is placed in the inner arc, and the outer arc main reinforcement is placed in the outer arc. The inner arc limiting plate and the outer arc limiting plate are displaced by the driving assembly, so that the inner arc limiting block and the inner arc limiting plate can jointly clamp the inner arc main reinforcement, and the outer arc limiting block and the outer arc limiting plate can jointly clamp the outer arc main reinforcement, thereby clamping and fixing the inner arc main reinforcement and the outer arc main reinforcement, so that the inner arc main reinforcement and the outer arc main reinforcement can be quickly kept coaxial, and the positioning accuracy between the outer arc main reinforcement and the inner arc main reinforcement is improved. In addition, taking the inner arc main reinforcement as an example, if the inner arc main reinforcement is deformed, the combination of the inner arc limiting block and the inner arc limiting plate can clamp and fix the inner arc main reinforcement, so that the deformed inner arc main reinforcement can be corrected to restore the curvature, thereby facilitating the installation of the connecting reinforcement between the inner arc main reinforcement and the outer arc main reinforcement.

[0029] 2. By setting the positioning block, the positioning rod, the abutting spring and the linkage, when the first cylinder drives the connecting strip to displace to clamp and fix the inner arc main reinforcement and the outer arc main reinforcement, the positioning block can be lifted under the action of the linkage and drive the two positioning rods to swing under the action of the first guide surface, so that the positioning block and the two positioning rods can abut against the peripheral wall of the connecting reinforcement, thereby positioning the connecting reinforcement.

[0030] 3. By setting the pushing block, the pushing frame and the lifting strip, during the movement of the connecting strip, the pushing block is displaced, the pushing block pushes the lifting strip to lift a certain distance through the second guide surface, thereby lifting the positioning block by a certain distance, so that the positioning block and the two positioning rods can jointly clamp the connecting reinforcement, thereby improving the convenience of positioning the connecting reinforcement. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of a pipe piece reinforcement skeleton in the background technology;

[0032] Figure 2 is a structural schematic diagram of a main reinforcement assembly in the background technology;

[0033] Figure 3 is a schematic diagram of the overall structure of embodiment 1;

[0034] Figure 4 is a partial sectional view of embodiment 1 embodying a driving assembly;

[0035] Figure 5 is a structural schematic diagram of a positioning mechanism of embodiment 1;

[0036] Figure 6 is Figure 5 enlarged view of area A in Figure 1 ;

[0037] Figure 7 is a schematic view of a positioning assembly embodying example 1 ;

[0038] Figure 8 is a partial cross-sectional view of a connecting strip embodying example 2;

[0039] Figure 9 is a schematic view of a connecting strip embodying example 2;

[0040] Figure 10 is a partial cross-sectional view of an adjustment assembly embodying example 3;

[0041] Figure 11 is a partial cross-sectional view of a positioning assembly embodying example 4;

[0042] Figure 12 is a partial cross-sectional view of a linkage embodying example 4;

[0043] Figure 13 is a partial cross-sectional view of a second guide surface embodying example 4;

[0044] Figure 14 is a partial cross-sectional view of a thickened sheet embodying example 5.

[0045] Explanation of reference numerals in the attached drawings: 1. Mounting support; 11. Rotating body; 111. Column; 12. Robot welding device; 2. Rotating platform; 21. Clearance groove; 22. Moving groove; 23. Positioning area; 24. Loading station; 25. Adjustment station; 26. Welding station; 27. Unloading station; 28. Sliding groove; 29. ​​Positioning groove; 3. Positioning mechanism; 31. Inner arc limiting block; 32. Inner arc limiting plate; 33. Outer arc limiting block; 34. Outer arc limiting plate; 341. First connecting bolt; 35. Inner arc track; 36. Outer arc track; 4. Drive assembly; 41. First cylinder; 42. Second cylinder; 421. Lifting plate; 43. Third cylinder; 44. Connecting bar; 45. Return spring; 5. Adjustment group Components; 51. Adjusting screw; 52. Moving block; 6. Positioning assembly; 61. Clamping piece; 611. Clamping channel; 612. Folding piece; 613. Guide channel; 62. Positioning block; 621. First guide surface; 622. First roller; 63. Positioning rod; 631. Second roller; 632. Third roller; 64. Abutment spring; 65. Push block; 651. Thickened piece; 652. Third connecting bolt; 66. Push frame; 661. First push rod; 662. Second push rod; 67. Lifting bar; 671. Second guide surface; 7. Positioning seat; 71. Second connecting bolt; 72. Embedding groove; 8. Main rib assembly; 81. Inner arc main rib; 82. Outer arc main rib; 83. Connecting rib. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 3 -Appendix Figure 14 This application will be described in further detail.

[0047] Example 1:

[0048] This application discloses a positioning tooling system for an automated welding production line for the main reinforcement assembly of tunnel segments.

[0049] Reference Figure 3 , Figure 4 The positioning tooling system of the automated welding production line for the main reinforcement assembly of tunnel segments includes a mounting support 1, a rotary platform 2, and a positioning mechanism 3. A rotary body 11 is rotatably mounted on the top of the mounting support 1. The rotary platform 2 is a circular ring structure. Multiple columns 111 are fixedly mounted on the bottom of the rotary platform 2. The lower ends of the columns 111 are fixedly mounted on the rotary body 11. The rotary platform 2 is rotatably connected to the mounting support 1 through the rotary body 11 and can rotate along its own central axis. The mounting support 1 is equipped with a rotating component (not shown in the figure) for driving the rotary body 11 to rotate. The rotating component can be a combination of a motor and gears.

[0050] Reference Figure 3, the upper surface of the rotary platform 2 forms a loading station 24, an adjusting station 25, a welding station 26 and a discharging station 27, the loading station 24, the adjusting station 25, the welding station 26 and the discharging station 27 are sequentially arranged around the central axis of the rotary platform 2; the positioning mechanism 3 is provided with four groups, and the four groups of positioning mechanisms 3 are respectively arranged in the loading station 24, the adjusting station 25, the welding station 26 and the discharging station 27; the mounting support 1 is provided with a robot welding device 12 (the robot welding device 12 is a prior art structure, and its structure will not be described in detail here), and the robot welding device 12 is used for welding the reinforcing steel bars in the welding station 26.

[0051] Referring to Figure 4 , Figure 5 , each group of positioning mechanisms 3 comprises an inner arc limiting block 31, an inner arc limiting plate 32, an outer arc limiting block 33 and an outer arc limiting plate 34, the inner arc limiting block 31 and the outer arc limiting block 33 are fixedly installed on the upper surface of the rotary platform 2 in the form of bolt connection, and the outer arc limiting block 33 is located on the side of the inner arc limiting block 31 away from the central axis of the rotary platform 2; in this embodiment, the inner arc limiting block 31 and the outer arc limiting block 33 in each group of positioning mechanisms 3 are spaced apart and arranged around the central axis of the rotary platform 2.

[0052] Referring to Figure 4 , Figure 6 , the inner arc limiting plate 32 and the outer arc limiting plate 34 are slidingly arranged on the rotary platform 2, the number of the inner arc limiting plate 32 corresponds to the number of the inner arc limiting block 31, and the number of the outer arc limiting plate 34 corresponds to the number of the outer arc limiting block 33, a plurality of inner arc limiting blocks 31 and a plurality of inner arc limiting plates 32 form an inner arc channel 35, and the inner arc channel 35 is used for clamping the inner arc main reinforcement 81; a plurality of outer arc limiting blocks 33 and a plurality of outer arc limiting plates 34 form an outer arc channel 36, and the outer arc channel 36 is used for clamping the outer arc main reinforcement 82; in this embodiment, the inner arc channel 35, the outer arc channel 36 and the rotary platform 2 are coaxially arranged.

[0053] Referring to Figure 4 , Figure 5 , the mounting support 1 is provided with a driving assembly 4, and the driving assembly 4 is used for driving the inner arc limiting plate 32 and the outer arc limiting plate 34 in the welding station 26 to displace, so as to clamp and fix the inner arc main reinforcement 81 or the outer arc main reinforcement 82 rotated into the welding station 26; in this embodiment, the driving assembly 4 comprises a first cylinder 41, a second cylinder 42 and a third cylinder 43, the number of the first cylinder 41 corresponds to the number of the inner arc limiting plate 32, the cylinder body of the first cylinder 41 is installed on the mounting support 1, the piston rod of the first cylinder 41 is fixedly connected to the corresponding inner arc limiting plate 32, so as to drive the inner arc limiting plate 32 to approach or move away from the corresponding inner arc limiting block 31, and the inner arc limiting plate 32 is slidingly installed on the upper surface of the rotary platform 2 through the first cylinder 41.

[0054] Referring to Figure 4 , Figure 6 , the second cylinder 42 is vertically arranged, the cylinder body of the second cylinder 42 is fixedly installed on the mounting support 1, the piston rod of the second cylinder 42 is connected with the lifting plate 421, the number of the third cylinder body corresponds to the number of the outer arc limiting plate 34, the cylinder body of the third cylinder 43 is fixedly installed on the upper surface of the lifting plate 421, the piston rod of the third cylinder body is fixedly connected to the corresponding outer arc limiting plate 34, so as to drive the outer arc limiting plate 34 to approach or move away from the corresponding outer arc limiting block 33, the swing platform 2 is provided with an avoiding groove 21 for lifting of the third cylinder 43, and the number of the avoiding groove 21 corresponds to the number of the third cylinder 43.

[0055] Referring to Figure 5 , Figure 6 , Figure 7 , for the convenience of description, the area between the inner arc main rib 81 and the outer arc main rib 82 on the upper surface of the swing platform 2 is defined as the positioning area 23, and the positioning assembly 6 for positioning the contact rib 83 is arranged in the positioning area 23; in the embodiment, the positioning assembly 6 includes two clamping pieces 61, the two clamping pieces 61 are elastically arranged, one side of each of the two clamping pieces 61 is fixedly connected to the surface of the swing platform 2 by welding, and the two clamping pieces 61 are arranged at intervals and form a clamping channel 611 for clamping the contact rib 83.

[0056] The side of each clamping piece 61 away from the swing platform 2 is integrally formed with a folded piece 612, the folded pieces 612 of the two clamping pieces 61 form a guide channel 613 communicating with the clamping channel 611, and the guide channel 613 gradually decreases from the end away from the clamping channel 611 to the end close to the clamping channel 611; the contact rib 83 is clamped and fixed to the upper surface of the swing platform 2 by the two clamping pieces 61, and the two ends of the contact rib 83 are overlapped with the inner arc main rib 81 and the outer arc main rib 82, respectively, so as to be welded by the robot welding device 12 subsequently, to form the main rib assembly 8; it should be noted that the positioning assembly 6 corresponding to each contact rib 83 in the embodiment is two groups, and the two groups of positioning assemblies 6 are arranged at intervals along the length direction of the contact rib 83.

[0057] The implementation principle of the embodiment 1 of the present application is as follows: when the main reinforcement assembly 8 is prepared, the inner arc main reinforcement 81 is placed in the inner arc channel 35, the outer arc main reinforcement 82 is placed in the outer arc channel 36, and the connecting reinforcement 83 is clamped in the clamping channel 611; the piston rod of the first air cylinder 41 is driven to move outward, the inner arc limiting plate 32 is forced to move towards the inner arc limiting block 31, the inner arc channel 35 is reduced, and the inner arc limiting block 31 and the inner arc limiting plate 32 jointly clamp the inner arc main reinforcement 81; at the same time, the third air cylinder 43 is lifted by the second air cylinder 42, the outer arc limiting plate 34 passes through the avoiding slot 21 and is lifted to the same flatness as the outer arc limiting block 33, the piston rod of the third air cylinder 43 is driven to move outward, the outer arc limiting plate 34 is forced to move towards the outer arc limiting block 33, the outer arc channel 36 is reduced, and the outer arc limiting block 33 and the outer arc limiting plate 34 jointly clamp the outer arc main reinforcement 82, so that the inner arc main reinforcement 81 and the outer arc main reinforcement 82 are clamped and fixed, the inner arc main reinforcement 81 and the outer arc main reinforcement 82 can be quickly kept coaxial, and the positioning accuracy between the outer arc main reinforcement 82 and the inner arc main reinforcement 81 is improved; in addition, taking the inner arc main reinforcement 81 as an example, after the inner arc main reinforcement 81 is clamped and fixed by the combination of the plurality of inner arc limiting blocks 31 and the plurality of inner arc limiting plates 32, the deformed inner arc main reinforcement 81 can be corrected to restore the arc, thereby facilitating the installation of the connecting reinforcement 83 between the inner arc main reinforcement 81 and the outer arc main reinforcement 82.

[0058] Embodiment 2

[0059] The embodiment of the present application discloses a positioning tool system of a segment main reinforcement assembly automatic welding production line.

[0060] With reference to Figure 8 , Figure 9 The positioning tool system of the segment main reinforcement assembly automatic welding production line disclosed by the embodiment of the present application is different from that of the embodiment 1 in that:

[0061] In the embodiment, the number of the inner arc limiting blocks 31 and the outer arc limiting blocks 33 is correspondingly arranged, the driving assembly 4 includes the first air cylinder 41, the connecting strip 44 and the reset spring 45, the upper surface of the rotary platform 2 is provided with a plurality of sliding grooves 28, the plurality of sliding grooves 28 are arranged at intervals around the central axis of the rotary platform 2, and the two ends of each sliding groove 28 are arranged along the radial direction of the rotary platform 2; the number of the connecting strips 44 is correspondingly arranged with the number of the sliding grooves 28, each connecting strip 44 is slidably installed in the corresponding sliding groove 28, the connecting strip 44 is slidably installed in the rotary platform 2 through the sliding groove 28 and can slide along the radial direction of the rotary platform 2, the inner arc limiting plate 32 and the outer arc limiting plate 34 are connected to the corresponding connecting strip 44, and the inner arc limiting plate 32 and the outer arc limiting plate 34 are connected as a whole through the corresponding connecting strip 44.

[0062] With reference to Figure 8 , Figure 9 , the first cylinders 41 are provided in plurality, and the plurality of first cylinders 41 are provided in correspondence with the plurality of inner-arc limiting plates 32, the cylinder body of the first cylinder 41 is installed on the installation support 1, and the piston rod of the first cylinder 41 is directed towards the corresponding inner-arc limiting plate 32 for pushing the inner-arc limiting plate 32 to be close to the corresponding inner-arc limiting block 31; the number of the reset springs 45 is provided in correspondence with the number of the sliding grooves 28, the reset spring 45 is installed in the corresponding sliding groove 28, one end of the reset spring 45 is fixedly connected to the inner wall of the sliding groove 28, and the other end is fixedly connected to one end of the connecting strip 44, and the reset spring 45 normally moves the connecting strip 44 to the side close to the first cylinder 41, so as to expand the inner-arc channel 35 or the outer-arc channel 36.

[0063] The implementation principle of the embodiment 2 of the application is that the connecting strip 44 connects the inner-arc limiting plate 32 and the outer-arc limiting plate 34 in series, so that the inner-arc limiting plate 32 and the outer-arc limiting plate 34 are connected as a whole; after the inner-arc main rib 81 is placed in the inner-arc channel 35 and the outer-arc main rib 82 is placed in the outer-arc channel 36, when the piston rod of the first cylinder 41 is driven to be pushed outwards, the inner-arc limiting plate 32 and the outer-arc limiting plate 34 are synchronously moved, so as to simultaneously reduce the inner-arc channel 35 and the outer-arc channel 36, and then simultaneously clamp and fix the inner-arc main rib 81 and the outer-arc main rib 82, thereby improving the operation convenience of the overall structure and reducing the manufacturing cost.

[0064] Embodiment 3

[0065] The embodiment of the application discloses a positioning tool system of a segment main rib assembly automatic welding production line.

[0066] With reference to Figure 10 , the positioning tool system of the segment main rib assembly automatic welding production line disclosed by the embodiment of the application is different from the embodiment 2 in that:

[0067] In the embodiment, the surface of the rotating platform 2 is provided with a plurality of moving grooves 22, the plurality of moving grooves 22 are arranged at intervals around the central axis of the rotating platform 2, the two ends of each moving groove 22 are arranged in the radial direction of the rotating platform 2, and the number of the moving grooves 22 corresponds to the number of the outer-arc limiting blocks 33; the rotating platform 2 is provided with an adjusting assembly 5, and the adjusting assembly 5 is used for driving the outer-arc limiting block 33 to displace, so as to be close to or away from the corresponding inner-arc limiting block 31.

[0068] With reference to Figure 10The adjusting assembly 5 comprises an adjusting screw 51 and a moving block 52, the adjusting screw 51, the moving block 52 and the moving groove 22 are correspondingly arranged, the moving block 52 is slidingly installed in the corresponding moving groove 22, and the moving block 52 is fixedly connected with the bottom wall of the corresponding outer-arc limiting block 33, and the outer-arc limiting block 33 is slidingly installed in the moving groove 22 through the moving block 52; the adjusting screw 51 is rotationally installed in the corresponding moving groove 22, and the adjusting screw 51 is arranged in the moving block 52 of the corresponding moving groove 22 and is threadedly connected with the moving block 52 (the thread is not shown in the figure).

[0069] With reference to Figure 10 In the embodiment, the first connecting bolt 341 is arranged between the outer-arc limiting plate 34 and the connecting strip 44, the outer-arc limiting plate 34 is provided with a first connecting hole, the connecting strip 44 is provided with a plurality of second connecting holes, the plurality of second connecting holes are arranged along the length direction of the connecting strip 44, the first connecting bolt 341 is arranged in the first connecting hole and the second connecting hole in sequence and is threadedly connected with the second connecting hole, and the outer-arc limiting plate 34 is detachably installed on the connecting strip 44 through the first connecting bolt 341.

[0070] The implementation principle of the embodiment 3 is as follows: when the distance between the inner-arc main reinforcement 81 and the outer-arc main reinforcement 82 needs to be controlled (the pipe segment steel reinforcement framework with different thicknesses needs to be prepared), the adjusting assembly 5 is used to force the outer-arc limiting block 33 to displace along the moving groove 22, so that the outer-arc limiting block 33 is close to or away from the corresponding inner-arc limiting block 31, thereby adjusting the distance between the inner-arc main reinforcement 81 and the outer-arc main reinforcement 82, so that the pipe segment steel reinforcement framework with different thicknesses can be prepared, and the adaptability of the overall structure is improved.

[0071] Embodiment 4

[0072] The embodiment of the application discloses a positioning tool system of a pipe segment main reinforcement assembly automatic welding production line.

[0073] With reference to Figure 11 The positioning tool system of the pipe segment main reinforcement assembly automatic welding production line disclosed by the embodiment of the application is different from the embodiment 2 in that:

[0074] In the embodiment, the upper surface of the rotating platform 2 is provided with a plurality of positioning grooves 29 located in the positioning area 23, each positioning groove 29 penetrates the lower surface of the rotating platform 2, each positioning groove 29 is provided with a positioning seat 7, the second connecting bolt 71 is arranged between the positioning seat 7 and the rotating platform 2, the rotating platform 2 is provided with a third connecting hole, the side wall of the positioning seat 7 is provided with a plurality of fourth connecting holes, the plurality of fourth connecting holes are arranged along the height direction, the second connecting bolt 71 is arranged in the third connecting hole and the fourth connecting hole in sequence and is threadedly connected with the fourth connecting hole, and the positioning seat 7 is detachably installed on the rotating platform 2 through the second connecting bolt 71.

[0075] With reference to Figure 11 , the top wall of the positioning seat 7 is provided with an embedding groove 72 for embedding the linkage rib, the positioning assembly 6 comprises a positioning block 62, a positioning rod 63, an abutting spring 64 and a linkage, the positioning block 62 is slidingly installed on the positioning seat 7 and can be lifted, the top wall of the positioning block 62 is rotatably installed with a first roller 622 for abutting the peripheral wall of the linkage rib 83; the positioning rod 63 is provided with two, both of which are hingedly connected to the positioning seat 7, and both of which are symmetrically distributed on both sides of the positioning block 62, one end of each of the positioning rods 63 close to the positioning block 62 is rotatably installed with a third roller 632, and both sides of the positioning block 62 are provided with a first guide surface 621 corresponding to the two positioning rods 63, and the first guide surface 621 is used for abutting the third roller 632 of the corresponding positioning rod 63.

[0076] With reference to Figure 11 , both ends of the abutting spring 64 are connected to the two positioning rods 63, and the abutting spring 64 normally makes the third rollers 632 of the two positioning rods 63 abut the corresponding first guide surfaces 621 of the positioning block 62; one end of each of the two positioning rods 63 away from the positioning block 62 is rotatably installed with a second roller 631 for abutting the peripheral wall of the linkage rib 83, when the positioning block 62 is lifted and the first roller 622 abuts the peripheral wall of the linkage rib 83, the positioning block 62 pushes the two positioning rods 63 to rotate, and the second rollers 631 of the two positioning rods 63 abut the peripheral wall of the linkage rib 83, when the first roller 622 and the two second rollers 631 all abut the peripheral wall of the linkage rib 83, the first roller 622 and the two second rollers 631 are triangularly arranged around the central axis of the linkage rib 83, and can roll along the length direction of the linkage rib 83.

[0077] With reference to Figure 11 , Figure 12 , Figure 13 , the linkage is arranged between the positioning block 62 and the connecting strip 44, when the connecting strip 44 is displaced towards the side away from the first air cylinder 41 to clamp the inner-arc main rib 81 and the outer-arc main rib 82, the linkage forces the positioning block 62 to lift, so that the positioning block 62 and the two positioning rods 63 clamp the linkage rib 83.

[0078] The linkage comprises a pushing block 65, a pushing frame 66 and a lifting bar 67, the pushing block 65 is fixedly installed on the upper surface of the connecting strip 44 in the form of welding fixation, the pushing frame 66 is slidingly installed at the bottom of the rotary platform 2, the pushing frame 66 is respectively connected with a first pushing rod 661 and a second pushing rod 662, one end of the first pushing rod 661 is fixedly connected to the pushing frame 66, the other end is fixedly connected to the lifting bar 67, one end of the second pushing rod 662 is fixedly connected to the pushing frame 66, the other end is fixedly connected to the positioning block 62; the bottom of the lifting bar 67 is provided with a second guide surface 671, the second guide surface 671 is used for abutting against the pushing block 65, when the connecting strip 44 is displaced towards the side away from the first air cylinder 41, the pushing block 65 forces the lifting bar 67 to lift through the second guide surface 671.

[0079] The implementation principle of the embodiment 4 of the application is as follows: the first air cylinder 41 drives the displacement of the connecting strip 44, when the inner arc main rib 81 and the outer arc main rib 82 are clamped and fixed, the connecting strip 44 can drive the positioning block 62 to lift through the lifting bar 67, so that the positioning block 62 and the two positioning rods 63 clamp and fix the contact rib 83, so that the clamping and fixing of the inner arc main rib 81, the outer arc main rib 82 and the contact rib 83 are synchronously performed, the operation convenience of the overall structure is improved, and the subsequent welding operation is facilitated. In addition, after the welding is completed, the piston rod of the first air cylinder 41 is driven to retreat, so that the clamping effect on the inner arc main rib 81, the outer arc main rib 82 and the contact rib is simultaneously released, and then the disassembly of the formed main rib assembly 8 is facilitated, and the overall work efficiency is greatly improved.

[0080] Embodiment 5:

[0081] The embodiment of the application discloses a positioning tool system of a segment main rib assembly automatic welding production line.

[0082] With reference to Figure 14 The positioning tool system of the segment main rib assembly automatic welding production line disclosed by the embodiment of the application is different from that of the embodiment 4 in that:

[0083] In the embodiment, the thickening sheet 651 is detachably installed between the pushing block 65 and the top wall of the connecting strip 44, the connecting piece is arranged between the pushing block 65 and the connecting strip 44, and the pushing block 65 is detachably installed on the connecting strip 44 through the connecting piece; the connecting piece is a third connecting bolt 652, the surface of the pushing block 65 is provided with a fifth connecting hole, the surface of the thickening sheet 651 is provided with a sixth connecting hole, the top wall of the connecting strip 44 is provided with a seventh connecting hole, and the third connecting bolt 652 is sequentially arranged in the fifth connecting hole, the sixth connecting hole and the seventh connecting hole and is threadedly connected with the seventh connecting hole.

[0084] The implementation principle of the embodiment 5 of the application is that the thickening pieces 651 are arranged between the pushing block 65 and the connecting strip 44, the lifting distance of the lifting strip 67 can be changed, and then the lifting distance of the positioning block 62 is changed, according to the actual requirement of the lifting distance of the positioning block 62, different numbers of the thickening pieces 651 are selected to be installed, so that the positioning block 62 and the two positioning rods 63 can be used for clamping the contact tendons 83 with different diameters, and the applicability of the overall structure is greatly improved.

[0085] The above is the preferred embodiment of the application, which does not limit the protection scope of the application, therefore: all equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A positioning tool system of an automatic welding production line for segmental main reinforcement assembly, characterized in that: The application relates to a rotary platform for positioning a main reinforcing bar, which comprises a mounting support (1), a rotary platform (2) and a positioning mechanism (3), wherein the rotary platform (2) is rotationally connected to the mounting support (1), and the positioning mechanism (3) is arranged on the rotary platform (2); the positioning mechanism (3) comprises inner-arc limiting blocks (31), inner-arc limiting plates (32), outer-arc limiting blocks (33) and outer-arc limiting plates (34), the inner-arc limiting blocks (31) and the outer-arc limiting blocks (33) are arranged on the rotary platform (2) and are spaced apart around the central axis of the rotary platform (2), the inner-arc limiting plates (32) and the outer-arc limiting plates (34) are slidingly arranged on the rotary platform (2), the number of the inner-arc limiting plates (32) corresponds to the number of the inner-arc limiting blocks (31), and the number of the outer-arc limiting plates (34) corresponds to the number of the outer-arc limiting blocks (33), an inner-arc channel (35) for clamping an inner-arc main reinforcing bar (81) is formed between the inner-arc limiting blocks (31) and the inner-arc limiting plates (32), an outer-arc channel (36) for clamping an outer-arc main reinforcing bar (82) is formed between the outer-arc limiting blocks (33) and the outer-arc limiting plates (34), and the inner-arc channel (35) and the outer-arc channel (36) are coaxially arranged; the mounting support (1) is provided with a driving assembly (4), the driving assembly (4) is used for driving the inner-arc limiting plates (32) and the outer-arc limiting plates (34) to displace, so as to clamp and fix the inner-arc main reinforcing bar (81) or the outer-arc main reinforcing bar (82); the driving assembly (4) comprises a first cylinder (41), a connecting strip (44) and a reset spring (45), the cylinder body of the first cylinder (41) is arranged on the mounting support (1), the piston rod of the first cylinder (41) faces the inner-arc limiting plates (32) and is used for pushing the inner-arc limiting plates (32) to be close to the corresponding inner-arc limiting blocks (31), the connecting strip (44) is slidingly connected to the rotary platform (2), the inner-arc limiting plates (32) and the outer-arc limiting plates (34) are connected to the connecting strip (44), and the reset spring (45) is arranged between the connecting strip (44) and the rotary platform (2), the reset spring (45) normally drives the connecting strip (44) to move towards the side close to the first cylinder (41), so as to expand the inner-arc channel (35) or the outer-arc channel (36). ​ 2. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 1, characterized in that: The number of the inner-arc limiting blocks (31) and the outer-arc limiting blocks (33) corresponds to the number of the inner-arc limiting plates (32) and the outer-arc limiting plates (34), the surface of the rotary platform (2) is provided with a moving groove (22), and the outer-arc limiting blocks (33) are slidingly arranged in the moving groove (22); the rotary platform (2) is provided with an adjusting assembly (5), the adjusting assembly (5) is used for driving the outer-arc limiting blocks (33) to displace, so as to be close to or away from the corresponding inner-arc limiting blocks (31).

3. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 1, characterized in that: The rotary platform (2) is provided with a positioning area (23), the positioning area (23) is located between the inner-arc main reinforcing bar (81) and the outer-arc main reinforcing bar (82), and the positioning area (23) is provided with a positioning assembly (6) for positioning a connecting reinforcing bar (83).

4. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 3, characterized in that: The positioning assembly (6) comprises two clamping pieces (61), which are elastically arranged, one side of each of the two clamping pieces (61) is connected to the surface of the rotating platform (2), a clamping channel (611) for clamping the connecting rib (83) is formed between the two clamping pieces (61), each clamping piece (61) is provided with a folding piece (612) away from one side of the rotating platform (2), a guide channel (613) communicating with the clamping channel (611) is formed between the two folding pieces (612), and the guide channel (613) gradually decreases from the end away from the clamping channel (611) to the end close to the clamping channel (611).

5. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 3, characterized in that: The positioning assembly (6) comprises two clamping pieces (61), which are elastically arranged, one side of each of the two clamping pieces (61) is connected to the surface of the rotating platform (2), a clamping channel (611) for clamping the connecting rib (83) is formed between the two clamping pieces (61), each clamping piece (61) is provided with a folding piece (612) away from one side of the rotating platform (2), a guide channel (613) communicating with the clamping channel (611) is formed between the two folding pieces (612), and the guide channel (613) gradually decreases from the end away from the clamping channel (611) to the end close to the clamping channel (611).

6. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 5, characterized in that: The positioning assembly (6) comprises two clamping pieces (61), which are elastically arranged, one side of each of the two clamping pieces (61) is connected to the surface of the rotating platform (2), a clamping channel (611) for clamping the connecting rib (83) is formed between the two clamping pieces (61), each clamping piece (61) is provided with a folding piece (612) away from one side of the rotating platform (2), a guide channel (613) communicating with the clamping channel (611) is formed between the two folding pieces (612), and the guide channel (613) gradually decreases from the end away from the clamping channel (611) to the end close to the clamping channel (611).

7. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 6, characterized in that: The positioning assembly (6) comprises two clamping pieces (61), which are elastically arranged, one side of each of the two clamping pieces (61) is connected to the surface of the rotating platform (2), a clamping channel (611) for clamping the connecting rib (83) is formed between the two clamping pieces (61), each clamping piece (61) is provided with a folding piece (612) away from one side of the rotating platform (2), a guide channel (613) communicating with the clamping channel (611) is formed between the two folding pieces (612), and the guide channel (613) gradually decreases from the end away from the clamping channel (611) to the end close to the clamping channel (611). The positioning assembly (6) comprises two clamping pieces (61), which are elastically arranged, one side of each of the two clamping pieces (61) is connected to the surface of the rotating platform (2), a clamping channel (611) for clamping the connecting rib (83) is formed between the two clamping pieces (61), each clamping piece (61) is provided with a folding piece (612) away from one side of the rotating platform (2), a guide channel (613) communicating with the clamping channel (611) is formed between the two folding pieces (612), and the guide channel (613) gradually decreases from the end away from the clamping channel (611) to the end close to the clamping channel (611).

8. The positioning tool system of the segmental main reinforcement assembly automatic welding production line according to claim 5, characterized in that: The top wall of the positioning block (62) is rotationally provided with a first roller (622), and the two positioning rods (63) are rotationally provided with second rollers (631) at the ends away from the positioning block (62), the first roller (622) and the two second rollers (631) abut against the circumferential wall of the connecting rib (83) and can roll along the length direction of the connecting rib (83); when the first roller (622) and the two second rollers (631) abut against the circumferential wall of the connecting rib (83), the first roller (622) and the two second rollers (631) are arranged in a triangular shape around the central axis of the connecting rib (83).

Citation Information

Patent Citations

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