Automatic welding and trimming device and method for longitudinal bars of box girder

Abstract

The invention relates to an automatic welding and trimming device and method for box girder longitudinal bars. The automatic welding and trimming device comprises a feeding mechanism, a welding mechanism and a trimming mechanism. The welding mechanism comprises a fixed butt welding machine, a movable butt welding machine, a rail and a translation driving cylinder; the finishing mechanism comprises an upper telescopic cylinder, a lower telescopic cylinder, an upper finishing head and a lower finishing head; the upper telescopic cylinder and the lower telescopic cylinder are correspondingly fixed to the upper portion and the lower portion of the machine shell and fixedly connected with the upper trimming head and the lower trimming head respectively, the upper trimming head and the lower trimming head are provided with upward clamping grooves and downward clamping grooves respectively, and the clamping grooves correspond to the clamping grooves of the upper clamp and the lower clamp in the vertical direction. The trimming structure is arranged on the movable butt welding machine, the trimming structure is combined with the translation driving structure of the movable butt welding machine to cut off the tumor formed after butt welding, the trimming structure has the advantages of being good in cutting effect, good in cutting completeness, easy to operate, small in improvement difficulty and low in maintenance cost, the welding seam precision and the welding quality are guaranteed, and the welding quality is improved. And the advantages of butt welding and beading removal and the like are integrated.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to an automatic welding and trimming device and method for longitudinal reinforcement of box girders. Background Technology

[0002] A single steel bar is typically 6-9 meters long. During the construction of box girder longitudinal reinforcement, multiple steel bars are usually welded together and then cut according to actual needs. In the process of steel bar welding, a welding machine is generally used.

[0003] The working principle of a butt welding machine is as follows: electrodes are mounted on a fixed plate and a sliding plate, respectively, and the sliding plate can move freely on a guide rail. Current is transmitted to the electrodes through the secondary coil of a transformer. When the pressure mechanism applies pressure, it causes the ends of the two steel bars to contact, forming a short circuit. The heat generated by the resistance heats the steel bars. When the steel bars reach a highly ductile state, additional compressive force is applied to ensure a firm butt joint, completing the welding process.

[0004] While butt welding machines have made significant progress in welding efficiency and quality within the existing welding technology system, there are still obvious shortcomings in the secondary processing stage after welding. Specifically, most current butt welding machines do not integrate cutting and weld bead removal functions. This means that after welding, workers must manually move the rebar to specialized cutting equipment for fixed-length processing, increasing the complexity and time cost of the operation. At the same time, weld bead removal also relies on manual grinding, a method that is not only inefficient and labor-intensive but also prone to incomplete cleaning due to human error, affecting the subsequent use and overall quality of the rebar.

[0005] In existing technologies, such as the invention patent with patent number 201710889475.4, a multi-functional butt welding integrated machine is disclosed, including a welding workbench and welding electrode assembly, a first rebar support, a hydraulic cylinder mounting base, a welding hydraulic cylinder, a downward pressing power head and a clamping base, a second rebar support, and a process trimming mechanism adjacent to the second rebar support. The process trimming mechanism includes a support frame and a process trimming workbench. The process trimming mechanism includes a pushing mechanism adjacent to the second rebar support, a rebar clamping mechanism adjacent to the pushing mechanism, a weld bead removal mechanism adjacent to the rebar clamping mechanism, and a rebar cutting mechanism adjacent to the weld bead removal mechanism. A guide rail is provided on the upper surface of the process trimming workbench between the rebar clamping mechanism and the weld bead removal mechanism along the rebar walking direction. The rebar clamping mechanism is slidably mounted on the guide rail and connected to the pushing mechanism. However, this structure requires a separate drive structure, which is relatively cumbersome to operate and difficult to modify. Based on this, it is necessary to study an automatic welding trimming device and method for box girder longitudinal reinforcement. Summary of the Invention

[0006] Therefore, the purpose of this invention is to provide an automatic welding and trimming device and method for longitudinal reinforcement of box girders, which effectively solves the problems of high difficulty and low efficiency in the trimming of welded steel bars in existing systems.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: an automatic welding and trimming device for longitudinal reinforcement of box girder, comprising a feeding mechanism, a welding mechanism and a trimming mechanism; the feeding mechanism includes a feeding frame and a conveying roller; the conveying roller is rotatably arranged inside the feeding frame, and the conveying roller is connected to a motor drive. The welding mechanism includes a fixed butt welding machine, a mobile butt welding machine, a track, and a translation drive cylinder. The fixed butt welding machine is fixedly installed, while the mobile butt welding machine is correspondingly laterally installed on the track. The translation drive cylinder enables the mobile butt welding machine to move on the track. Both the mobile butt welding machine and the fixed butt welding machine include a housing, an upper clamp, a lower clamp, and a lifting cylinder. The lifting cylinder is installed on the upper part of the housing and connected to the upper clamp. The lower clamp corresponds to the upper clamp and is located on the lower part of the housing. The trimming mechanism includes an upper telescopic cylinder, a lower telescopic cylinder, an upper trimming head, and a lower trimming head. The upper telescopic cylinder and the lower telescopic cylinder are fixed to the upper and lower parts of the machine housing, respectively, and are fixedly connected to the upper trimming head and the lower trimming head. The upper trimming head and the lower trimming head have upward and downward slots, respectively, and the slots correspond to the clamping grooves of the upper clamp and the lower clamp in the vertical direction.

[0008] Furthermore, the translation drive cylinder, lifting cylinder, upper telescopic cylinder, and lower telescopic cylinder are all connected to the controller and constitute a control system.

[0009] Furthermore, the upper and lower clamps are provided with corresponding positioning blocks, and the upper and lower trimming heads are provided with corresponding positioning tracks, with the positioning blocks adapted to be installed in the positioning tracks.

[0010] Furthermore, both the upper trimming head and the lower trimming head include a trimming block and a drive seat. The drive seat is connected to the rod of the telescopic cylinder. The drive seat is provided with a trimming block, and a trimming groove is formed on the trimming block. The trimming groove is U-shaped and includes an adapter section and an extension section. The adapter section is semi-circular, and the extension section is rectangular.

[0011] Furthermore, a fixed seat is provided on the inlet side of the mobile welding machine, and a translation drive cylinder is provided between the fixed seat and the mobile welding machine. A guide frame is provided on the fixed seat, and a guide cylinder is provided on the guide frame. A guide hole that gradually shrinks and then gradually expands is provided inside the guide cylinder.

[0012] Furthermore, the rear side of the fixed butt welding machine is sequentially provided with a clamping roller, a meter counter, and a cutting mechanism. The clamping roller is used to clamp and transport the reinforcing bars. The meter counter is used to measure the length of the longitudinal reinforcing bars after butt welding. The cutting mechanism includes a cutting cylinder, a cutting seat, and a cutting blade. The telescopic section of the cutting cylinder is provided with a cutting blade. The cutting blade corresponds to the cutting seat and forms a cutting gap.

[0013] Furthermore, both the upper and lower clamps are provided with clamping grooves that are larger on the outside and smaller on the inside; both the upper and lower trimming heads include a drive seat, an adjustment seat, and a trimming disc; the drive seat is fixed with an adjustment seat, the adjustment seat and the trimming disc are rotatably connected in the middle and fixedly connected through the surrounding fixing holes, and the trimming disc is provided with multiple trimming grooves with gradually changing opening sizes.

[0014] Furthermore, the conveying roller has a structure that gradually expands from the center to both sides.

[0015] A method for automatically welding and trimming the longitudinal reinforcement of a box girder includes the following steps; Step 1: Move or place the steel bar into the feeding mechanism. The feeding mechanism is started and the steel bar is conveyed laterally. Step 2: The first rebar passes through the mobile butt welding machine and the fixed butt welding machine. Its front end enters the clamping rollers and continues to move forward under the traction of the clamping rollers. Its rear end is between the fixed butt welding machine and the mobile butt welding machine. Step 3: The next steel bar is connected to the previous steel bar via the feeding mechanism, so that the two steel bars are connected between the moving welding machine and the fixed welding machine. Step 4: Start the lifting cylinder. The lifting cylinder drives the upper clamp to move downward, so that the upper clamp and lower clamp clamp the steel bar. Start the welding machine, and the translation drive cylinder drives forward. At the same time, the electrodes work to weld the ends of the steel bars together. Step 5: Keep the welding machine in a fixed clamping state, stop the electrode from working, move the lifting cylinder of the welding machine to rise, move the translation drive cylinder to move backward, and at the same time extend the lower telescopic cylinder so that the lower trimming head is correspondingly clamped on the steel bar. Start the translation drive cylinder to move forward so that the lower trimming head moves along the steel bar from the bottom and removes the lumps from the bottom. Step six: retract the lower telescopic cylinder, move the translation drive cylinder backward, start the upper telescopic cylinder, clamp the upper trimming head onto the rebar, move the translation drive cylinder forward, so that the upper trimming head moves horizontally along the rebar from the top, and cuts off the nodule from the top; then the translation drive cylinder retracts, the upper telescopic cylinder retracts, the lifting cylinder of the fixed welding machine rises, and the rebar is released.

[0016] Furthermore, in step six, when the upper telescopic cylinder performs the telescopic action, the lifting cylinder also descends so that the top of the upper trimming head rests against the upper clamp.

[0017] The beneficial effects of the above technical solution are as follows: The present invention utilizes the structure of a butt welding machine and configures a corresponding trimming structure between the fixed butt welding machine and the mobile butt welding machine. Specifically, the trimming structure is configured on the mobile butt welding machine. By using the translation drive structure of the mobile butt welding machine in combination with the trimming structure, the butt weld spores formed after butt welding can be removed. This structure has the advantages of good removal effect, good removal integrity, simple operation, low difficulty in improvement, and low maintenance cost. It ensures weld accuracy and welding quality and integrates butt welding removal and weld spore removal into one.

[0018] In its specific implementation, the structure is configured with two corresponding telescopic cylinders above and below the mobile welding machine, namely the upper telescopic cylinder and upper trimming head, and the lower telescopic cylinder and lower trimming head structure. The upper telescopic cylinder, lower telescopic cylinder, translation drive cylinder, and two lifting cylinders are connected to the control system. The controller controls the telescopic amount of the corresponding cylinders and the extension length of the cylinder body. Through simple structural improvements and control logic design, the integrated design of welding and trimming is achieved.

[0019] This invention achieves a fully automated process for the longitudinal reinforcement of box girders, from feeding to welding to finishing, through the coordinated operation of the feeding mechanism, welding mechanism, and finishing mechanism. This significantly improves production efficiency, reduces manual operation, and lowers labor intensity. The welding mechanism combines fixed and mobile welding machines, ensuring the accuracy of rebar splicing and welding quality through precise translation and lifting control. Furthermore, the design of the positioning blocks and positioning tracks further enhances the precision and stability of the welding process.

[0020] The trimming mechanism, through the coordination of upper and lower telescopic cylinders and the trimming head, can remove weld nodules from both top and bottom directions, ensuring thorough and uniform trimming and improving the surface quality and appearance of the reinforcing bars. The translation drive cylinder, lifting cylinder, upper telescopic cylinder, and lower telescopic cylinder are all connected to the controller, forming a control system that enables intelligent control and remote operation of the equipment, improving its flexibility and reliability.

[0021] The various components in this invention are rationally designed. The structure of the conveying roller, which gradually widens from the middle to both sides, facilitates the stable transmission of reinforcing bars. The outer-large-inner-small clamping groove design of the upper and lower clamps better accommodates reinforcing bars of different diameters. The fitting section and extension section design of the trimming groove better adapt to and trim the reinforcing bars. In addition to welding and trimming functions, the device is also equipped with a meter counter and a cutting mechanism, which can measure and cut the length of the welded longitudinal bars, further improving the integrity and flexibility of the production line. Through automated operation, the direct manual involvement in high-risk processes such as welding and trimming is reduced, improving the safety of the production process.

[0022] Therefore, this invention combines the existing butt welding machine equipment mechanism with simple structural optimization and modification, and optimizes and upgrades the control program. The butt welding machine can meet the purpose of trimming while taking into account butt welding, greatly improving production efficiency, ensuring welding and trimming quality, reducing labor intensity, improving safety and intelligence level, and has significant economic and social benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of the present invention; Figure 2 for Figure 1 Front view structural diagram; Figure 3 for Figure 1 A top-view structural diagram; Figure 4 for Figure 1 A schematic diagram of the side view structure; Figure 5 This is a diagram showing the usage state of the present invention; Figure 6 This is a schematic diagram of the trimming process of the present invention; Figure 7 A schematic diagram of the multi-adaptive trimming structure; Figure 8 This is a schematic diagram of the adaptable clamping groove structure.

[0024] Reference numerals: 1-Feeding rack, 2-Conveying roller, 3-Guide frame, 4-Guide hole, 5-Moving butt welding machine, 6-Fixed butt welding machine, 7-Lifting cylinder, 8-Upper clamp, 9-Lower clamp, 10-Clamping groove, 11-Upper telescopic cylinder, 12-Upper trimming head, 121-Adaptor section, 122-Extension section, 13-Lower telescopic cylinder, 14-Lower trimming head, 15-Railway, 16-Translation drive cylinder, 17-Rebar, 18-Front clamping roller, 19-Rear feeding roller, 20-Cutting cylinder, 21-Cutting seat, 22-Nodule, 23-Drive seat, 24-Adjusting seat, 25-Bolt, 26-Trimming groove, 27-Positioning block. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1: This example aims to provide an automatic welding and trimming device for longitudinal reinforcement of box girders. It is mainly used for the formation of longitudinal reinforcement during the production and processing of box girders. The longitudinal reinforcement is relatively long and generally requires multiple steel bars to be welded together. Then, it is cut according to the corresponding length. The current welding technology is relatively mature, but after welding, a nodule will be formed at the weld. For the treatment of the nodule, the existing technology generally grinds it, but the treatment is difficult. In the existing technology, there is also a rapid cutting operation after the fluid is formed, but the current structure is a separate configuration, which occupies a large area. It is difficult to modify the current welding structure. Based on this, this example provides an automatic welding and trimming device for longitudinal reinforcement of box girders.

[0026] like Figure 1-4 As shown, an automatic welding and trimming device for longitudinal reinforcement of box girder includes a feeding mechanism, a welding mechanism, and a trimming mechanism. In this embodiment, the feeding mechanism is used to transport the reinforcing bars, specifically using a single-sided feeding method, continuously transporting the reinforcing bars from one side of the welding machine. The welding mechanism uses a reinforcing bar resistance welding machine, which is a relatively mature technology, and its specific working principle will not be elaborated here. The trimming structure is configured on the welding mechanism, specifically on the moving welding machine, to achieve rapid removal of the initial stage of the lumps.

[0027] In the specific implementation structure, the feeding mechanism includes a feeding frame 1 and a conveying roller 2. The conveying roller 2 is rotatably mounted inside the feeding frame 1 and is connected to a motor drive. The feeding frame 1 is fixed to the ground by support legs, and one side is equipped with a material feeding structure. Alternatively, steel bars can be manually placed one by one into the feeding frame, and the rotating conveying roller is used to transport the steel bars. In implementation, multiple conveying rollers are installed, and their shafts are connected via belt drive. One of the shafts is connected to a motor drive.

[0028] The welding mechanism includes a fixed butt welding machine 6, a mobile butt welding machine 5, a track 15, and a translation drive cylinder 16. The fixed butt welding machine 6 is fixedly installed, and the mobile butt welding machine 5 is correspondingly transversely installed on the track 15. The translation drive cylinder 16 enables the mobile butt welding machine 5 to move on the track 15. In practice, the track 15 is set on both sides, and the mobile butt welding machine 5 moves along the track under the action of the translation drive cylinder 16, which reduces or increases the distance between the fixed butt welding machine 6 and the mobile butt welding machine 5. The area between the mobile butt welding machine 5 and the fixed butt welding machine 6 is the butt welding area.

[0029] Both the mobile butt welding machine 5 and the fixed butt welding machine 6 include a housing, an upper clamp 8, a lower clamp 9, and a lifting cylinder 7. The lifting cylinder 7 is installed on the upper part of the housing and connected to the upper clamp 8. The lower clamp 9 corresponds to the upper clamp 8 and is located on the lower part of the housing. The steel bars are clamped by the clamps, and current is applied to the steel bars by the electrodes on the clamps. The mobile butt welding machine 5 is moved forward with the next steel bar by the translation drive cylinder 16 to achieve the welding purpose.

[0030] The trimming mechanism includes an upper telescopic cylinder 11, a lower telescopic cylinder 13, an upper trimming head 12, and a lower trimming head 14. The upper telescopic cylinder 11 and the lower telescopic cylinder 13 are fixed to the upper and lower parts of the machine housing, respectively, and are fixedly connected to the upper trimming head 12 and the lower trimming head 14. The upper trimming head 12 and the lower trimming head 14 have upward and downward slots, respectively, and the slots correspond vertically to the clamping grooves of the upper clamp 8 and the lower clamp 9.

[0031] In a further implementation, a fixed base is provided on the inlet side of the mobile butt welding machine 5, and a translation drive cylinder 16 is provided between the fixed base and the mobile butt welding machine 5. A guide frame 3 is provided on the fixed base, and a guide cylinder is provided on the guide frame 3. The guide cylinder has guide holes 4 that gradually narrow and then gradually widen. This structure enables the reinforcing bars to be quickly positioned and transferred into the mobile butt welding machine 5, thus improving the positioning accuracy of the reinforcing bar movement.

[0032] The rear side of the fixed butt welding machine 6 is provided with a clamping roller, a meter counter and a cutting mechanism. The clamping roller is used to clamp and transport the steel bars. In practice, a front clamping roller 18 can also be configured on the front side of the mobile butt welding machine 5 and a rear clamping roller 19 can be configured on the rear side of the fixed butt welding machine to realize the transport of steel bars.

[0033] like Figure 5 As shown, the meter counter is used to measure the length of the longitudinal reinforcement after welding. The meter counter is connected to the cutting cylinder 20 through the controller. The reinforcement is cut according to the set requirements. In the specific cutting structure, the cutting mechanism includes the cutting cylinder 20, the cutting seat 21 and the cutting head. The telescopic section of the cutting cylinder 20 is equipped with the cutting head. The cutting head corresponds to the cutting seat 21 and forms a cutting gap. The purpose of cutting the reinforcement to a fixed length is achieved by controlling the telescopic extension of the cutting cylinder.

[0034] In terms of control, this embodiment connects the translation drive cylinder 16, lifting cylinder 7, upper telescopic cylinder 11, and lower telescopic cylinder 13 to the controller, forming a control system. The specific control flow and control logic are as follows: Figure 6 As shown in the figure, and perform the following method.

[0035] Specifically, this embodiment provides a method for automatic welding and trimming of longitudinal reinforcement in box girders, including the following steps; Step 1: Move or place the steel bar into the feeding mechanism. The feeding mechanism is started and the steel bar is conveyed laterally. Step 2: The first rebar passes through the mobile welding machine 5 and the fixed welding machine 6. Its front end enters the clamping rollers and continues to move forward under the traction of the clamping rollers. Its rear end is between the fixed welding machine 6 and the mobile welding machine 5. Step 3: The next steel bar is connected to the previous steel bar via the feeding mechanism, so that the two steel bars are connected between the moving welding machine 5 and the fixed welding machine 6. Step 4: Start the lifting cylinder 7. The lifting cylinder 7 drives the upper clamp 8 to move downward, so that the upper clamp 8 and the lower clamp 9 clamp the steel bar. Start the welding machine, and the translation drive cylinder 16 drives forward. At the same time, the electrode works to weld the ends of the steel bar together. Step 5: Keep the fixed welding machine 6 in a fixed clamping state, stop the electrode from working, move the lifting cylinder 7 of the moving welding machine 5 to rise, move the translation drive cylinder 16 to retreat, and at the same time extend the lower telescopic cylinder 13 so that the lower trimming head 14 is correspondingly clamped on the steel bar. Start the translation drive cylinder 16 to move forward so that the lower trimming head 14 moves along the steel bar from the bottom and removes the tumor from the bottom. Step six: The lower telescopic cylinder 13 retracts, the translation drive cylinder 16 moves backward, the upper telescopic cylinder 11 is activated, the upper trimming head 12 is clamped onto the rebar, the translation drive cylinder 16 moves forward, so that the upper trimming head 12 moves horizontally along the rebar from the top, and the nodule is removed from the top; then the translation drive cylinder 16 retracts, the upper telescopic cylinder 11 retracts, the lifting cylinder 7 of the fixed welding machine 6 rises, and the rebar is released.

[0036] This embodiment achieves a fully automated process for the longitudinal reinforcement of the box girder, from feeding to welding to finishing, through the coordinated operation of the feeding mechanism, welding mechanism, and finishing mechanism. This significantly improves production efficiency, reduces manual operation, and lowers labor intensity. The welding mechanism combines a fixed welding machine 6 and a moving welding machine 5, ensuring the accuracy of the rebar joints and the welding quality through precise translation and lifting control. Simultaneously, the design of the positioning blocks and positioning tracks further improves the accuracy and stability of the welding.

[0037] Example 2 further illustrates the installation structure.

[0038] In this embodiment, the upper clamp 8 and the lower clamp 9 are vertically arranged with corresponding positioning blocks 27, and the upper trimming head 12 and the lower trimming head 14 are provided with corresponding positioning tracks, and the positioning blocks are appropriately installed in the positioning tracks.

[0039] Both the upper trimming head 12 and the lower trimming head 14 include a trimming block and a drive seat. The drive seat is connected to the rod of the telescopic cylinder. The drive seat 23 is provided with a trimming block, and a trimming groove is opened on the trimming block. The trimming groove is a U-shaped groove, including an adapter section and an extension section. In this embodiment, the lower trimming block is used as an example for illustration. The adapter section 121 is semi-circular, and the extension section 122 is rectangular. This trimming groove structure can fully remove the nodules in the semi-circular area of ​​the steel bar, ensuring the trimming effect.

[0040] In practice, a positioning rail can be configured on the trimming block, and the positioning block 27 is set on the side of the fixture. The two are dovetail groove mating structures. This structure can form a rear support on the rear side of the trimming block. During the cutting operation, the structural stability of the trimming block is ensured, and the load generated by the cutting is prevented from acting on the telescopic cylinder, thus protecting the equipment.

[0041] Based on the above, during implementation, when the upper telescopic cylinder 11 performs the telescopic action, the lifting cylinder 7 also descends, so that the upper trimming head 12 rests against the upper clamp 8, providing support on the rear side of the upper trimming head 12.

[0042] Example 3: This example provides a further structure for trimming steel bars of different diameters, based on the structures in Examples 1-2.

[0043] Both the upper clamp 8 and the lower clamp 9 are provided with clamping grooves that are larger on the outside and smaller on the inside, as shown in the details. Figure 8 As shown, the clamping groove structure is a trapezoidal groove, which allows for contact with the reinforcing bar, ensuring normal electrode operation while accommodating reinforcing bars of different diameters. Both the upper trimming head 12 and the lower trimming head 14 include a drive seat 23, an adjusting seat 24, and a trimming disc. The adjusting seat 24 is fixed to the drive seat 23, and the adjusting seat 24 and trimming disc are rotatably connected at the center and fixedly connected by bolts 25 through peripheral fixing holes. The trimming disc is provided with multiple trimming grooves 26 with gradually varying opening sizes. In implementation, the fixing holes and trimming grooves are arranged in an array; specifically, three fixing holes and three trimming grooves can be configured. In implementation, when the fixing holes are positioned, the trimming grooves always face upwards.

[0044] like Figure 7 As shown, the trimming disc is equipped with trimming slots of various sizes. By rotating, the corresponding trimming slot can be oriented upwards, thereby achieving the adaptation and adjustment of the corresponding steel bar size. In order to simultaneously accommodate the conveying of multiple steel bar sizes, the conveying rollers have a structure that gradually expands from the middle to both sides. One side of the clamping rollers uses an adjustable elastic roller, such as arranging a spring at the rotating shaft of one side of the rollers to achieve the change of the clamping gap.

[0045] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is to configure the trimming structure on a mobile butt welding machine, and to achieve the removal of the lumps formed after butt welding by means of the translation drive structure of the mobile butt welding machine in combination with the trimming structure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An automatic welding and trimming device for longitudinal reinforcement of box girders, characterized in that: It includes a feeding mechanism, a welding mechanism, and a trimming mechanism; the feeding mechanism includes a feeding frame and a conveying roller; the conveying roller is rotatably arranged inside the feeding frame, and the conveying roller is connected to a motor drive. The welding mechanism includes a fixed butt welding machine, a mobile butt welding machine, a track, and a translation drive cylinder. The fixed butt welding machine is fixedly installed, while the mobile butt welding machine is correspondingly laterally installed on the track. The translation drive cylinder enables the mobile butt welding machine to move on the track. Both the mobile butt welding machine and the fixed butt welding machine include a housing, an upper clamp, a lower clamp, and a lifting cylinder. The lifting cylinder is installed on the upper part of the housing and connected to the upper clamp. The lower clamp corresponds to the upper clamp and is located on the lower part of the housing. The trimming mechanism includes an upper telescopic cylinder, a lower telescopic cylinder, an upper trimming head, and a lower trimming head. The upper telescopic cylinder and the lower telescopic cylinder are fixed to the upper and lower parts of the machine housing, respectively, and are fixedly connected to the upper trimming head and the lower trimming head. The upper trimming head and the lower trimming head have upward and downward slots, respectively, and the slots correspond to the clamping grooves of the upper clamp and the lower clamp in the vertical direction.

2. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 1, characterized in that: The translation drive cylinder, lifting cylinder, upper telescopic cylinder, and lower telescopic cylinder are all connected to the controller and constitute the control system.

3. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 1, characterized in that: The upper and lower clamps are provided with corresponding positioning blocks, and the upper and lower trimming heads are provided with corresponding positioning tracks, with the positioning blocks appropriately installed in the positioning tracks.

4. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 1, characterized in that: Both the upper trimming head and the lower trimming head include a trimming block and a drive seat. The drive seat is connected to the rod of the telescopic cylinder. The drive seat is provided with a trimming block, and a trimming groove is opened on the trimming block. The trimming groove is a U-shaped groove, including an adapter section and an extension section. The adapter section is semi-circular, and the extension section is rectangular.

5. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 1, characterized in that: The mobile welding machine is provided with a fixed base on the inlet side, and a translation drive cylinder is provided between the fixed base and the mobile welding machine. A guide frame is provided on the fixed base, and a guide cylinder is provided on the guide frame. A guide hole that gradually shrinks and then gradually expands is provided inside the guide cylinder.

6. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 1, characterized in that: The rear side of the fixed butt welding machine is sequentially equipped with a clamping roller, a meter counter, and a cutting mechanism. The clamping roller is used to clamp and transport the reinforcing bars. The meter counter is used to measure the length of the longitudinal bars after butt welding. The cutting mechanism includes a cutting cylinder, a cutting seat, and a cutting blade. The extension section of the cutting cylinder is equipped with a cutting blade, which corresponds to the cutting seat and forms a cutting gap.

7. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 1, characterized in that: Both the upper and lower clamps are provided with clamping grooves that are larger on the outside and smaller on the inside; both the upper and lower trimming heads include a drive seat, an adjustment seat, and a trimming disc; the drive seat is fixed with an adjustment seat, the adjustment seat and the trimming disc are rotatably connected in the middle and fixedly connected through the surrounding fixing holes, and the trimming disc is provided with multiple trimming grooves with gradually changing opening sizes.

8. The automatic welding and trimming device for longitudinal reinforcement of box girders according to claim 7, characterized in that: The conveying roller has a structure that gradually expands from the middle to both sides.

9. A method for automatic welding and trimming of longitudinal reinforcement bars in box girders, applied to the automatic welding and trimming device for longitudinal reinforcement bars in box girders as described in claims 1-8, characterized in that, Includes the following steps; Step 1: Move or place the steel bar into the feeding mechanism. The feeding mechanism is started and the steel bar is conveyed laterally. Step 2: The first rebar passes through the mobile butt welding machine and the fixed butt welding machine. Its front end enters the clamping rollers and continues to move forward under the traction of the clamping rollers. Its rear end is between the fixed butt welding machine and the mobile butt welding machine. Step 3: The next steel bar is connected to the previous steel bar via the feeding mechanism, so that the two steel bars are connected between the moving welding machine and the fixed welding machine. Step 4: Start the lifting cylinder. The lifting cylinder drives the upper clamp to move downward, so that the upper clamp and lower clamp clamp the steel bar. Start the welding machine, and the translation drive cylinder drives forward. At the same time, the electrodes work to weld the ends of the steel bars together. Step 5: Keep the welding machine in a fixed clamping state, stop the electrode from working, move the lifting cylinder of the welding machine to rise, move the translation drive cylinder to move backward, and at the same time extend the lower telescopic cylinder so that the lower trimming head is correspondingly clamped on the steel bar. Start the translation drive cylinder to move forward so that the lower trimming head moves along the steel bar from the bottom and removes the lumps from the bottom. Step six: retract the lower telescopic cylinder, move the translation drive cylinder backward, start the upper telescopic cylinder, clamp the upper trimming head onto the rebar, move the translation drive cylinder forward, so that the upper trimming head moves horizontally along the rebar from the top, and cuts off the nodule from the top; then the translation drive cylinder retracts, the upper telescopic cylinder retracts, the lifting cylinder of the fixed welding machine rises, and the rebar is released.

10. The method for automatic welding and trimming of longitudinal reinforcement in box girders according to claim 9, characterized in that, In step six, when the upper telescopic cylinder performs the telescopic action, the lifting cylinder also descends so that the top of the upper trimming head rests against the upper clamp.

Images