Production equipment and production method for prefabricated box girder spiral bar steel reinforcement framework

Abstract

The invention belongs to the technical field of constructional engineering, and particularly relates to the field of prefabricated box girder processing and manufacturing, in particular to prefabricated box girder spiral reinforcement cage production equipment and a production method, which can solve the problems of tedious reinforcement bending and welding processes and large deviation in the prior art, meet various parameter index requirements of reinforcement cages, and improve the production efficiency. The device comprises a door frame I, a door frame II, a door frame I, a door frame II and a door frame II, the door frame I is internally provided with a vertically-distributed fixed panel, and the periphery of the fixed panel is provided with a rotating frame capable of being driven to rotate; the portal frame II is distributed behind the portal frame I in parallel, an annular rotating disc is installed in the portal frame II in a rotating mode, and a winding drum for winding steel bars is arranged at the front end of the rotating disc; the rib bending die is of a long-plate-shaped structure and is fixed to the surface of the fixing panel, and a plurality of longitudinal rib conveying holes distributed in the length direction are formed in the left side and the right side of the rib bending die.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, and in particular relates to the field of precast box girder processing and manufacturing, specifically relating to a production equipment and method for producing spiral reinforcement cages for precast box girders. Background Technology

[0002] Precast box girders, as a common structural component in bridge construction, involve several production steps, including steel reinforcement cage binding, concrete pouring, curing, and tensioning. The steel reinforcement cage binding process includes cutting, bending, splicing with a jig, and securing with binding wire. This traditional method, which has been used for many years, requires pre-processing the steel reinforcement into various bending shapes such as stirrups and sleeves. The final assembly is done manually by multiple people, with each bending step requiring adherence to established standards. The steel reinforcement cage typically uses spiral and longitudinal reinforcement welded together, as shown in the closed stirrup steel reinforcement cage of a box girder disclosed in patent CN218170864U.

[0003] However, the above methods have disadvantages such as complicated procedures, difficulty in controlling dimensional deviations, low production efficiency, and high labor requirements. Furthermore, the existing steel reinforcement assembly is a splicing of individual parts, and its overall strength is insufficient compared to the spiral reinforcement. Summary of the Invention

[0004] This invention provides a production equipment and method for precast box girder spiral reinforcement cages, which can solve the problems of cumbersome and large deviations in the bending and welding processes of steel bars in the prior art. It can not only meet the various parameter requirements of the reinforcement cage, but also speed up the process and reduce costs and increase efficiency.

[0005] This invention is achieved through the following technical solution: A production equipment for spiral reinforcement cages of precast box girders, comprising, The gantry I has vertically distributed fixed panels inside, and a rotating frame capable of being driven to rotate is provided on the outer periphery of the fixed panels. Gantry II is distributed in parallel behind gantry I. A ring-shaped turntable is installed inside it, and the front end of the turntable is provided with a drum around which the reinforcing steel bar is wound. A rebar guide device is disposed on the surface of the rotating frame and is used to guide and straighten the rebars drawn from the rebar coil; The steel bar bending mold is a long plate-shaped structure fixed to the surface of the fixed panel, and has multiple longitudinal bar conveying holes distributed along the length direction on its left and right sides. Welding system for welding spiral reinforcing bars and longitudinal bars.

[0006] Furthermore, a coiled bar frame is provided between the rotating frame and the drum. The coiled bar frame is spiral segmented, and the inner side of the coiled bar frame is provided with a limiting opening that allows the reinforcing bars led out from the coiled reinforcing bars to pass through.

[0007] Furthermore, the outer periphery of the fixed panel is an outer circumferential surface, and the rotating frame is rotatably mounted on the outer circumferential surface of the fixed panel; Both the rotating frame and the turntable have external gear rings fixed on their outer circumferences, and the external gear rings are driven to rotate by a drive motor through gear engagement.

[0008] Furthermore, the rebar guiding device includes a base plate fixed on the rotating frame, and two rows of guide wheel groups are provided on the base plate. Each row of guide wheel groups includes multiple guide wheels rotatably connected to the base plate by pins, and a guiding space is formed between the two rows of guide wheel groups to allow the rebar to pass through.

[0009] Furthermore, the welding system includes a resistance welding negative electrode and a resistance welding positive electrode. The resistance welding negative electrode is a plate-like structure and is disposed on the end face of the steel bar bending die near the end face of the gantry II. The resistance welding positive electrode is in two sets and is located on the left and right sides of the resistance welding negative electrode respectively. The resistance welding positive electrode includes a welding plate that can move left and right. The welding plate has multiple positive electrode heads on the surface close to the resistance welding negative electrode.

[0010] Furthermore, it also includes a frame, with the bottoms of gantry I and gantry II jointly mounted on the frame, and the bottom of the frame being provided with multiple wheels.

[0011] Furthermore, the welding system also includes a welding bracket, which is mounted on the frame and located behind the gantry II. The welding bracket is provided with a cantilever, which passes through the center holes of the turntable and the drum from back to front. The front end of the cantilever is provided with a connecting seat, and the connecting seat is provided with an electric cylinder. The telescopic end of the electric cylinder is connected to the welding plate.

[0012] Furthermore, the left and right sides of the steel bar bending mold are provided with multiple longitudinal bar positioning grooves, and the longitudinal bar positioning grooves correspond one-to-one with the longitudinal bar conveying holes.

[0013] A method for producing spiral reinforcement cages for precast box girders, using the precast box girder spiral reinforcement cage production equipment described in this invention, includes the following steps: S01. Wind the steel bar coils on the drum and pass the two rows of longitudinal bars through the longitudinal bar conveying holes of the fixed panel from front to back. S02. The reinforcing bars led out from the coiled reinforcing bars first pass through the reinforcing bar guiding device, and then the reinforcing bars are wrapped around the reinforcing bar bending mold to form the first section of spiral reinforcing bar. Two rows of longitudinal reinforcing bars are located inside the first section of spiral reinforcing bar. The first spiral reinforcing bar is welded to the longitudinal reinforcing bars by manual welding. S03. Drive the rotating frame to rotate, and use the rebar guide device to bend the rebar around the rebar bending mold into a section of spiral rebar; S04. As the longitudinal reinforcement moves from front to back, the spiral reinforcement bent in step S03 is removed from the steel bar bending mold and welded to the longitudinal reinforcement through the welding system. S05. Repeat steps S03-S04 to weld several sections of spiral reinforcement onto the longitudinal reinforcement to form a spiral reinforcement skeleton.

[0014] The beneficial effects achieved by this invention compared with the prior art are as follows: 1. The precast box girder spiral reinforcement cage production equipment of the present invention winds the reinforcing bars onto a drum, guides and straightens the reinforcing bars through a reinforcing bar guiding device, and bends the reinforcing bars into rectangular spiral bars through a reinforcing bar bending die as the rotating frame rotates. Then, it is welded together with the longitudinal bars. This equipment can not only meet the various parameter requirements of the reinforcing bar cage, but also speed up the process, reduce costs and increase efficiency, and greatly improve the production efficiency of the reinforcing bar cage. The precast box girder spiral reinforcement cage production method of the present invention utilizes the precast box girder spiral reinforcement cage production equipment of the present invention to complete the processing of various components of the reinforcement cage, improve work efficiency, and ensure parameter indicators. 2. Compared with the traditional method, the original process is reduced and optimized. This production method of precast box girder spiral reinforcement steel skeleton can significantly reduce the traditional manual material cutting and binding process, speed up the process, save production costs, and greatly improve the yield rate by using machines. It avoids the inconvenience of manual outdoor binding operation and the problem of binding and forming deviation. 3. A coiled bar frame is provided between the rotating frame and the drum. The inner side of the coiled bar frame is provided with a limiting opening that allows the steel bars led out from the coiled bar to pass through. This design facilitates the leading of the steel bars from the coiled bar into the steel bar guide device of the rotating frame, avoiding interference of the steel bar section between the two with other equipment and ensuring the safe operation of the equipment. 4. Both the rotating frame and the turntable have external gear rings fixed on their outer circumferences. These gear rings are driven to rotate by a drive motor through gear engagement. This design allows for precise control of the rotation speed of the rotating frame and turntable via the drive motor, ensuring stable and controllable rotation. 5. The welding system includes a resistance welding negative electrode, a resistance welding positive electrode, and a welding support. The welding system enables the rapid welding of bent spiral ribs and longitudinal ribs, thereby improving welding efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall production equipment for the spiral reinforcement cage of precast box girders according to the present invention; Figure 2 This is a three-dimensional schematic diagram of the gantry II described in this invention; Figure 3 for Figure 1 Enlarged schematic diagram of structure A in the middle; Figure 4 This is a schematic diagram of the resistance welding positive electrode and resistance welding negative electrode described in this invention; Figure 5 This is a schematic diagram of the resistance welding negative electrode and the rebar bending mold described in this invention; Figure 6 This is a schematic diagram of a tie rod trolley in the prior art; Figure 7 This is a schematic diagram of the welding bracket described in this invention; Figure 8 This is a schematic diagram of the auxiliary bending mechanism described in this invention; Figure 9 This is a schematic diagram of the cooperation between the movable plate and the external rack assembly described in this invention; Figure 10 This is a schematic diagram of the inclined surface of the steel bar bending mold described in this invention; In the diagram: 1. Frame, 11. Traveling wheel, 2. Gantry I, 21. Fixed panel, 22. Rebar guide device, 221. Guide wheel assembly, 23. Rotating frame, 3. Gantry II, 31. Turntable, 4. Rebar bending mold, 41. Longitudinal bar conveying hole, 42. Longitudinal bar positioning groove, 43. Inclined surface, 5. External gear ring, 6. Rebar frame, 7. Resistance welding negative electrode, 8. Resistance welding positive electrode, 81. Welding plate, 82. Positive electrode head, 9. Welding bracket, 91. Cantilever, 92. Connecting seat, 93. Electric cylinder, 10. Auxiliary bending mechanism, 101. Track, 102. Track motor, 103. Rolling head, 104. Moving seat, 105. External rack assembly, 106. Guide wheel. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] In the description of the invention, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention. Example 1 like Figure 1-2 As shown, this embodiment describes a production equipment for the spiral reinforcement cage of precast box girders, which mainly includes a frame 1, a gantry I 2, a gantry II 3, a reinforcement guiding device 22, a reinforcement bending mold 4, and a welding system.

[0018] The frame 1 is constructed by horizontal welding of a steel frame, and two rows of wheels 11 are installed at the bottom of the frame 1 for easy movement of the entire equipment. Both gantry I2 and gantry II3 are constructed by welding steel frames, and their bottoms are fixed to the frame 1 using bolt assemblies. Gantry I2 and gantry II3 are arranged parallel to each other front to back. Vertically distributed fixed panels 21 are installed inside gantry I2. The fixed panels 21 are made of steel plate, and their outer circumference is machined into an outer circumferential surface. A rotating frame 23 is swivelly mounted on the outer circumferential surface of the fixed panels 21, allowing the rotating frame 23 to rotate relative to the fixed panels 21.

[0019] The gantry II3 is distributed in parallel behind the gantry I2. The gantry II3 is made of welded steel frame with a pre-drilled circular mounting hole inside. A turntable 31 is installed in the mounting hole of the gantry II3. The turntable 31 is made of an annular steel frame with a circular hole in the center. A drum is set at the front end of the turntable 31 for winding the reinforcing bars.

[0020] To facilitate the rotation of the rotating frame 23 and the turntable 31, external gear rings 5 ​​are fixed on the outer circumference of both the rotating frame 23 and the turntable 31. The external gear rings 5 ​​are driven to rotate by a drive motor through gear engagement, and the drive motor is fixedly mounted on the frame. A coiled rebar frame 6 is welded between the rotating frame 23 and the drum. The coiled rebar frame 6 is spiral segmented, and the inner side of the coiled rebar frame 6 is provided with a limiting opening that allows the rebar extending from the coiled rebar to pass through. The limiting opening is square.

[0021] like Figure 3As shown, the rebar guiding device 22 is disposed on the surface of the rotating frame 23, and its main function is to guide and straighten the rebars drawn from the rebar coil. In this embodiment, the rebar guiding device 22 includes a base plate fixed on the rotating frame 23, and two rows of guide wheel groups 221 are provided on the base plate. Each row of guide wheel groups 221 includes multiple guide wheels rotatably connected to the base plate by pins, and a guiding space is formed between the two rows of guide wheel groups 221 to allow the rebars to pass through. Since the rebars drawn from the rebar coil have a moving arc, they need to be straightened. Passing the rebars between the two rows of guide wheel groups 221 can achieve a large degree of straightening effect.

[0022] like Figure 4-5 As shown, the rebar bending die 4 is a long plate-shaped structure. The rebar bending die 4 is fixed to the surface of the fixed panel 21. The rebar bending die 4 is a bending die for spiral rebar, which can bend the rebar into a rectangular shape when it is wrapped around the die once. Multiple longitudinal rebar conveying holes 41, distributed along the length of the rebar bending die 4, are machined on the left and right sides of the fixed panel 21. The longitudinal rebar conveying holes 41 on the same side are arranged in a vertical row. This design allows two rows of longitudinal rebars to pass through the longitudinal rebar conveying holes 41 on the left and right sides of the rebar bending die 4. To ensure that the longitudinal rebars are as close as possible to the left and right sides of the rebar bending die 4, multiple longitudinal rebar positioning grooves 42 are machined on the surfaces of the left and right sides of the rebar bending die 4. The longitudinal rebar positioning grooves 42 correspond one-to-one with and are connected to the longitudinal rebar conveying holes 41.

[0023] The welding system is used to weld the intersection of bent spiral reinforcing bars and longitudinal reinforcing bars. The system includes a resistance welding negative electrode 7 and a resistance welding positive electrode 8. The resistance welding negative electrode 7 is a plate-like structure and is positioned on the end face of the reinforcing bar bending die 4 near the gantry II 3. Two sets of resistance welding positive electrodes 8 are located on the left and right sides of the resistance welding negative electrode 7, respectively. Each resistance welding positive electrode 8 includes a welding plate 81 that can move left and right. Multiple positive electrode heads 82 are provided on the surface of the welding plate 81 near the resistance welding negative electrode 7. The welding principle is as follows: when the intersection of the longitudinal reinforcing bar and the bent spiral reinforcing bar appears on the surface of the resistance welding negative electrode 7, the welding plate moves, causing the positive electrode heads 82 to press against the intersection of the longitudinal and spiral reinforcing bars, thus achieving welding under the action of the resistance welding negative electrode 7.

[0024] Based on the aforementioned equipment for producing spiral reinforcement cages for precast box girders, this embodiment also discloses a method for producing spiral reinforcement cages for precast box girders, comprising the following steps: S01. Wind the steel bar coils on the drum, pass the two rows of longitudinal bars through the longitudinal bar conveying holes 41 of the fixed panel 21 from front to back, and then extend them from the center of the turntable 31. S02. The reinforcing bars led out from the coiled reinforcing bars first pass through the reinforcing bar guide device 22, and then the reinforcing bars are wrapped around the reinforcing bar bending mold 4 to form the first section of spiral reinforcing bars. The two rows of longitudinal reinforcing bars are located inside the first section of spiral reinforcing bars. The intersection of the first spiral reinforcing bar and the longitudinal reinforcing bars is welded by manual welding. S03, drive the rotating frame 23 and turntable 31 to rotate synchronously, and bend the steel bar around the steel bar bending mold 4 into a section of spiral bar through the steel bar guiding device 22; S04. As the longitudinal reinforcement moves from front to back, it will pull the welded spiral reinforcement backward. The spiral reinforcement bent in step S03 will detach from the steel bar bending mold 4, and the spiral reinforcement will be welded to the longitudinal reinforcement using a welding system. To facilitate the movement of the longitudinal reinforcement, a conventional steel bar trolley can be used, such as... Figure 6 As shown, it mainly includes a mobile vehicle body, on which a bracket is installed to fix the first end of the longitudinal rib to the bracket. S05. Repeat steps S03-S04 to weld several sections of spiral reinforcement onto the longitudinal reinforcement to form a spiral reinforcement skeleton.

[0025] The above-described method is used to process individual spiral reinforcement cages, which are then assembled into the overall frame of the box girder for casting. The precast box girder spiral reinforcement cage production method described in this embodiment, utilizing the precast box girder spiral reinforcement cage production equipment of this invention, can complete the processing of various components of the reinforcement cage, integrating bending and welding processes into one, improving work efficiency, and ensuring parameter indicators.

[0026] Example 2 This embodiment also discloses a production equipment for the spiral reinforcement cage of precast box girders, which is further optimized, such as... Figure 7 As shown, the welding system also includes two sets of welding supports 9. To avoid interfering with the operation of the rib frame, the welding supports 9 are mounted on the frame 1 and located behind the gantry II 3. The welding supports 9 have transversely distributed cantilever arms 91 that pass through the turntable 31 and the center hole of the drum from back to front. A connecting seat 92 is installed at the front end of each cantilever arm 91. An electric cylinder 93 is mounted on the connecting seat 92, and the telescopic end of the electric cylinder 93 is connected to the welding plate 81. To improve the stability of the welding plate 81, two smooth guide rods are provided on the welding plate 81, which slide in conjunction with pre-drilled sliding holes on the connecting seat 92. When welding is required, the electric cylinder 93 is controlled to move the welding plate 81.

[0027] Example 3 Although steel bars can be bent into rectangles, they are relatively stiff. To improve the bending effect, this embodiment discloses a production equipment for the spiral reinforcement cage of precast box girders, such as... Figure 4 , Figure 8 and Figure 9As shown, it also includes an auxiliary bending mechanism 10. The auxiliary bending mechanism 10 has a racetrack-shaped structure. The auxiliary bending mechanism 10 is fixed on the surface of the fixed panel 21 and surrounds the steel bar bending mold 4. The auxiliary bending mechanism 10 mainly includes a track 101, a rolling head 103, a moving seat 104, a track motor 102 and other structures.

[0028] The track 101 has a racetrack-shaped structure. An external rack assembly 105 is installed along the lower part of the outer perimeter of the track 101's outer wall. The external rack assembly 105 is composed of two straight racks and two curved racks. A movable seat 104 is slidably mounted on the top surface of the track 101. Two guide wheels 106 are rotatably mounted on the left and right sides of the bottom surface of the movable seat 104, and the guide wheels 106 on both sides roll in contact with the left and right side walls of the track 101, respectively. A track motor 102 is mounted on the movable seat 104, and the output shaft of the track motor 102 is driven by the external rack assembly 105 through gear meshing. The rolling head 103 has an inverted conical structure, and its bottom end is rotatably connected to the middle position of the movable seat 104.

[0029] To protect the external rack assembly 105, a protective housing is installed on the outside of the guide rail. The protective housing is also a racetrack-shaped structure, and a racetrack-shaped opening groove is machined on the top surface of the protective housing to allow the rolling head 103 to extend outward.

[0030] When the drive rotating frame 23 and turntable 31 rotate synchronously, the steel bar is bent into a spiral bar by the steel bar guide device 22 around the steel bar bending mold 4. During this process, the guide rail motor controls the moving seat 104 to move the rolling head 103, so that the rolling head 103 is behind the steel bar and squeezes the steel bar, so that the steel bar is bent quickly and the efficiency of bending the steel bar on the steel bar bending mold 4 is improved.

[0031] Example 4 This embodiment also discloses a production equipment for the spiral reinforcement cage of precast box girders, which is further optimized, such as... Figure 10 As shown, the top and bottom surfaces of the rebar bending die are both machined into inclined surfaces 43. The inclined surfaces 43 are inclined along the direction of longitudinal bar movement, and the inclination angle is controlled at about 5°. This design makes it easy for the spiral bars formed by bending to detach from the rebar bending die.

Claims

1. A production equipment for spiral reinforcement cages of precast box girders, characterized in that, Including, The gantry I (2) has vertically distributed fixed panels (21) inside, and the outer periphery of the fixed panels (21) is provided with a rotating frame (23) that can drive rotation. The gantry II (3) is distributed in parallel behind the gantry I (2), and a ring-shaped turntable (31) is installed inside it. The front end of the turntable (31) is provided with a drum around the coiled steel bars. A rebar guide device (22) is provided on the surface of the rotating frame (23) for guiding and straightening the rebars drawn from the rebar coil; The steel bar bending mold (4) is a long plate structure and is fixed on the surface of the fixed panel (21). Multiple longitudinal bar conveying holes (41) are provided on its left and right sides along the length direction. Welding system for welding spiral reinforcing bars and longitudinal bars.

2. The equipment for producing spiral reinforcement cages for precast box girders according to claim 1, characterized in that, A coiled bar frame (6) is provided between the rotating frame (23) and the drum. The coiled bar frame (6) is spiral segmented, and the inner side of the coiled bar frame (6) is provided with a limiting opening that allows the reinforcing bars drawn out from the coiled bar to pass through.

3. The equipment for producing spiral reinforcement cages for precast box girders according to claim 2, characterized in that, The outer periphery of the fixed panel (21) is an outer circumferential surface, and the rotating frame (23) is rotated and installed on the outer circumferential surface of the fixed panel (21); Both the rotating frame (23) and the turntable (31) have an external gear ring (5) fixed on their outer circumferences. The external gear ring (5) is driven to rotate by a drive motor through gear engagement.

4. The equipment for producing spiral reinforcement cages for precast box girders according to claim 1, characterized in that, The rebar guiding device (22) includes a base plate fixed on the rotating frame (23), and two rows of guide wheel groups (221) are provided on the base plate. Each row of guide wheel groups (221) includes multiple guide wheels rotatably connected to the base plate by pins. A guiding space is formed between the two rows of guide wheel groups (221) to allow the rebar to pass through.

5. The equipment for producing spiral reinforcement cages for precast box girders according to claim 1, characterized in that, The welding system includes a resistance welding negative electrode (7) and a resistance welding positive electrode (8). The resistance welding negative electrode (7) is a plate-shaped structure and is disposed on the end face of the steel bar bending mold (4) near the gantry II (3). The resistance welding positive electrode (8) consists of two sets, located on the left and right sides of the resistance welding negative electrode (7). The resistance welding positive electrode (8) includes a welding plate (81) that can move left and right. Multiple positive electrode heads (82) are provided on the surface of the welding plate (81) near the resistance welding negative electrode (7).

6. The equipment for producing spiral reinforcement cages for precast box girders according to claim 5, characterized in that, It also includes a frame (1), the bottom of which is mounted on the frame (1) together with the bottom of the gantry I (2) and the gantry II (3), and the bottom of the frame (1) is provided with multiple wheels (11).

7. The equipment for producing spiral reinforcement cages for precast box girders according to claim 6, characterized in that, The welding system also includes a welding bracket (9), which is mounted on the frame (1) and located behind the gantry II (3). A cantilever (91) is mounted on the welding bracket (9), which passes through the turntable (31) and the center hole of the drum from back to front. A connecting seat (92) is provided at the front end of the cantilever (91), and an electric cylinder (93) is provided on the connecting seat (92). The telescopic end of the electric cylinder (93) is connected to the welding plate (81).

8. The equipment for producing spiral reinforcement cages for precast box girders according to any one of claims 5-7, characterized in that, The steel bar bending mold (4) has multiple longitudinal bar positioning grooves (42) on its left and right sides, and the longitudinal bar positioning grooves (42) correspond one-to-one with the longitudinal bar conveying holes (41).

9. The equipment for producing spiral reinforcement cages for precast box girders according to claim 8, characterized in that, It also includes an auxiliary bending mechanism, which is a racetrack-shaped structure. The auxiliary bending mechanism is fixed to the surface of the fixed panel and includes a track, a rolling head, a moving seat, and a track motor. The track is a racetrack-shaped structure. An external rack assembly is installed along the outer perimeter of the lower part of the outer wall of the track. The movable seat is slidably installed on the top surface of the track. Guide wheels are rotatably installed on the left and right sides of the bottom surface of the movable seat. The guide wheels on both sides are in rolling contact with the left and right side walls of the track, respectively. The track motor is mounted on the moving base. The output shaft of the track motor is driven by gear meshing with the external rack assembly. The bottom end of the rolling head is rotatably connected to the middle position of the moving base.

10. A method for producing spiral reinforcement cages for precast box girders, characterized in that, The production of precast box girder spiral reinforcement cages using the equipment described in any one of claims 1-9 includes the following steps: S01. Wind the steel bar coils on the drum and pass the two rows of longitudinal bars through the longitudinal bar conveying holes (41) of the fixed panel (21) from front to back. S02. The reinforcing bars drawn out from the coiled reinforcing bars first pass through the reinforcing bar guide device (22), and then the reinforcing bars are wrapped around the reinforcing bar bending mold (4) to form the first section of spiral reinforcing bars. The two rows of longitudinal reinforcing bars are located inside the first section of spiral reinforcing bars. The first spiral reinforcing bar is welded to the longitudinal reinforcing bars by manual welding. S03, drive the rotating frame (23) to rotate, and bend the steel bar around the steel bar bending mold (4) in one circle to form a spiral bar through the steel bar guiding device (22); S04. As the longitudinal reinforcement moves from front to back, the spiral reinforcement bent in step S03 is removed from the steel bar bending mold (4), and the spiral reinforcement is welded to the longitudinal reinforcement through the welding system. S05. Repeat steps S03-S04 to weld several sections of spiral reinforcement onto the longitudinal reinforcement to form a spiral reinforcement skeleton.

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