A welding device and method for road bridge expansion joint processing

Abstract

The application discloses a kind of welding equipment and method for road bridge expansion joint processing, belong to welding equipment technical field.A kind of welding equipment for road bridge expansion joint processing, including conveying roller frame, further include: positioning mechanism, two groups are provided and respectively set in the two sides of conveying roller frame, for the positioning of profile steel in conveying;Material mechanism is connected with positioning mechanism, including the material box for loading anchoring steel bar and first push material component and second push material component set on material box;And welding component, including by multi-axis mechanical arm and the welding torch set at the end of multi-axis mechanical arm;The application is provided with material mechanism, utilizes hydraulic cylinder linkage first, second push material component, realizes the automatic circulation supply of anchoring steel bar " push one spare one ", and is accurately positioned by positioning mechanism, U-shaped limiting plate and auxiliary channel, realizes the process automation of from profile steel feeding to finished product off-line, high-precision, continuous operation.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a welding equipment and method for processing expansion joints of roads and bridges. Background Technology

[0002] Bridge expansion joints are installed to accommodate bridge deck deformation. They are typically located between the ends of two beams, between a beam end and an abutment, or at hinged joints of the bridge. These expansion joints must be able to expand and contract freely and reliably in both directions parallel and perpendicular to the bridge axis. Existing bridge expansion joints are mostly classified as butt-joint type or steel-supported type. Butt-joint expansion joints are usually constructed by welding a steel body and anchoring reinforcement.

[0003] Currently, the welding of these expansion joints relies heavily on manual labor or semi-automated equipment. The main process involves placing the steel profiles on a conveyor roller table, manually placing the anchor bars, and operating a welding machine. However, the existing production method suffers from several technical bottlenecks, hindering production efficiency and quality stability. First, manual placement and positioning of the anchor bars is not only labor-intensive and slow, but also difficult to guarantee precise positional consistency, making welding quality highly dependent on worker skills. Second, during the steel profile conveying process, deviations or rotations can easily occur on the roller table, causing subsequent anchor bars to fail to precisely align with the ear plates on the side of the steel profile. This often requires repeated manual adjustments, severely impacting the continuity and cycle time of automated production. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a welding equipment and method for processing road and bridge expansion joints.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A welding device for processing road and bridge expansion joints includes a conveyor roller frame and further includes: The positioning mechanism consists of two sets, each located on one side of the conveyor roller frame, used to position the steel sections during conveying. The feeding mechanism, connected to the positioning mechanism, includes a material box for holding anchor steel bars and a first pushing component and a second pushing component disposed on the material box, wherein the first pushing component and the second pushing component are arranged vertically. And welding components, including a multi-axis robotic arm mounted on a conveyor roller frame via a support plate and a welding torch located at the end of the multi-axis robotic arm; The first pushing component is activated in conjunction with the second pushing component.

[0006] Preferably, the positioning mechanism includes an adjusting screw threadedly connected to the side support plate of the conveyor roller frame and a positioning plate movably disposed at the end of the adjusting screw.

[0007] Preferably, the positioning plate is provided with a roller body via a rotating shaft that moves against the side ear plate of the steel section.

[0008] Preferably, the material box includes a box body fixedly connected to a positioning plate by a connecting plate and a slide rail disposed at the end of the box body and connected to the box body. The box body has a storage cavity for storing anchoring steel bars, and the shape of the storage cavity matches the anchoring steel bars.

[0009] Preferably, the first pushing assembly includes a hydraulic cylinder fixed to the bottom of the material box, a connecting plate connected to the piston rod of the hydraulic cylinder, and a first push plate fixedly connected to the connecting plate via a connecting rod, wherein the first push plate slides in the slide rail.

[0010] Preferably, the second pushing assembly includes a threaded rod rotatably connected to the material box, a sleeve threadedly connected to the threaded rod and sliding in the material box, and a second push plate fixedly connected to the sleeve, the second push plate sliding in the storage cavity.

[0011] Preferably, the end of the threaded rod is provided with a one-way gear, and the connecting plate is provided with a rack plate that meshes with the one-way gear, and the rack plate is slidably disposed on the outside of the material box.

[0012] Preferably, a U-shaped limiting plate is also fixed on the connecting plate by a connecting rod. The U-shaped limiting plate moves against the ear plate on the side of the steel section, and the open end of the U-shaped limiting plate is provided with a guide slope.

[0013] Preferably, the end of the slide is connected to an auxiliary channel located below the side ear plate of the steel profile. The auxiliary channel is rotatably mounted on a swing plate via a pin on one side of the steel profile's moving direction. A torsion spring for driving the swing plate to reset and rotate is mounted on the pin.

[0014] This invention also discloses a welding method for processing road and bridge expansion joints, which involves welding using the aforementioned welding equipment for processing road and bridge expansion joints, and includes the following steps: S1: Hoist the long steel section to be welded onto the conveyor roller of the conveyor roller frame, neatly stack multiple anchoring steel bars in the storage cavity of the material box, and pre-place an anchoring steel bar in the slide that connects to the end of the storage cavity. S2: According to the specifications of the steel section, manually rotate the adjusting screws installed on both sides of the conveyor roller frame. The adjusting screws drive the positioning plate to move inward until the roller on the positioning plate shaft abuts against the ear plate on the side of the steel section. The two positioning plates work together to limit the left and right deviation and torsion of the steel section during subsequent conveying. S3: The control system is activated, and the piston rod of the hydraulic cylinder begins to retract. The piston rod synchronously drives the first push plate, the rack plate, and the U-shaped limit plate to move towards the steel section through the connecting plate. S4: The U-shaped limiting plate first contacts the ear plate, and its guide slope guides the ear plate into the U-shaped groove. Before welding, it assists in limiting the steel section to prevent it from sliding on the circular conveyor roller. The first pusher plate moves forward in the slide, pushing the anchoring steel bar that was pre-placed in the slide forward. The steel bar enters the auxiliary channel through the slide and is precisely pushed to the preset welding position with the web and ear plate of the steel section. The inner wall of the auxiliary channel plays a temporary positioning role for the steel bar. During this process, the rack plate meshes with the one-way gear, but due to the "one-way" characteristic of the gear, it does not drive the threaded rod to rotate, and the second pusher assembly does not move. S5: After the anchoring steel bars are in place, the multi-axis robotic arm drives the welding torch to move according to the preset program, and automatically welds the contact parts of the anchoring steel bars with the steel profile and ear plate. The support of the auxiliary channel ensures the stability of the steel bars during welding. S6: After welding is completed, the hydraulic cylinder piston rod extends, and the connecting plate drives each component to reset; The U-shaped limiting plate and the first push plate are disengaged from the working position. During the reset process, the rack plate moves in the opposite direction and meshes with the one-way gear to drive it to rotate. The one-way gear drives the threaded rod to rotate, causing the sleeve and the second push plate connected to it to move laterally in the storage cavity, thereby pushing the next anchoring steel bar from the storage cavity into the empty slide, preparing the material for the next welding station. S7: The conveyor roller frame starts, driving the steel section with a welded anchor bar to move forward one pitch, that is, the distance between the two ear plates. When the welded anchor bar passes through the auxiliary channel, it will collide with and push away the swing plate hinged by the pin. The swing plate can be reset under the action of the torsion spring, avoiding rigid collision between the welded bar and the fixed parts of the equipment. S8: After the steel section is moved into place, the next ear plate is located at the welding station. The equipment repeats the above steps and starts the next round of automated cycle of "pushing material - limiting position - welding - resetting - preparing material - conveying" until the welding of all anchor bars on the entire steel section is completed.

[0015] Compared with the prior art, the present invention provides a welding equipment and method for processing road and bridge expansion joints, which has the following beneficial effects: 1. This invention uses a hydraulic cylinder to drive a first pusher plate to push the steel bar while simultaneously linking a rack plate with a one-way gear. During the reset stroke, the rack plate drives a threaded rod and a second pusher plate to automatically push the next steel bar from the storage chamber into the slide. This achieves a "weld one, prepare the next" cycle, replacing the traditional manual pick-and-place and positioning mode with a one-drive-multiple-action, time-series linkage design. It integrates discrete processes into a seamless automatic cycle, shortening the single-point welding cycle. It is especially suitable for batch processing of long steel sections, improving production efficiency and eliminating the speed fluctuations and fatigue effects of manual operation.

[0016] 2. This invention uses a static lateral guide formed by adjusting the screw and the positioning plate with rollers to continuously correct the deviation of the steel section during conveying. Before welding, the hydraulically driven U-shaped limiting plate forms a longitudinal clamp on the ear plate and automatically aligns the ear plate through the guide slope, eliminating the slippage that may be caused by the circular roller track. At the same time, the anchoring steel bar is pushed by the first push plate along the slide and auxiliary channel, and its position and posture are precisely constrained by the rigid inner wall of the channel to ensure that the contact position with the ear plate is always consistent. This provides a stable and precise welding environment for the robot welding gun, making the weld quality of each steel bar uniform and reliable, and reducing quality defects caused by positioning deviation.

[0017] 3. This invention, by setting a passive swing plate structure at the end of the auxiliary channel, forces the plate to rotate and open around the pin shaft when the welded steel bar moves forward with the steel section and collides with the swing plate, making way for the channel. After the steel bar passes through, the swing plate automatically returns to the vertical stop position under the action of the torsion spring. This design does not require any sensors, controllers or additional power, which not only avoids damage or downtime caused by rigid collision between the steel bar and the equipment, ensuring the absolute smoothness of the steel section conveying, but also allows the auxiliary channel to have both "positioning" and "parts passing" functions at the same time, effectively ensuring the continuous and automated operation of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the external structure of the material box of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the external structure of the material box of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the external structure of the material box of the present invention. Figure 3 ; Figure 5 This is a schematic diagram of the material box structure of the present invention; Figure 6 This is a schematic diagram of the external structure of the connecting plate of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the box body of the present invention.

[0019] In the diagram: 1. Conveyor roller frame; 101. Support plate; 2. Structural steel; 201. Ear plate; 202. Anchoring steel bar; 3. Material box; 301. Box body; 3011. Storage cavity; 302. Slide rail; 4. Multi-axis robotic arm; 401. Welding torch; 5. Adjusting screw; 501. Positioning plate; 5011. Roller body; 6. Hydraulic cylinder; 601. Connecting plate; 602. First push plate; 7. Threaded rod; 701. Sleeve; 702. Second push plate; 8. One-way gear; 801. Rack plate; 9. U-shaped limiting plate; 901. Guide slope; 10. Auxiliary channel; 1001. Pin shaft; 1002. Swing plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 this 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 limitations on this invention.

[0022] like Figures 1 to 3 As shown, this embodiment proposes a welding equipment for processing road and bridge expansion joints, including a conveyor roller frame 1, and further comprising: The positioning mechanism consists of two sets, which are respectively located on both sides of the conveyor roller frame 1, and are used to position the steel section 2 during conveying. The feeding mechanism, connected to the positioning mechanism, includes a material box 3 for receiving the anchoring steel bar 202 and a first pushing component and a second pushing component set on the material box 3. The first pushing component and the second pushing component are arranged vertically. And welding components, including a multi-axis robotic arm 4 mounted on the conveyor roller frame 1 via a support plate and a welding torch 401 mounted at the end of the multi-axis robotic arm 4; The first pushing component is activated in conjunction with the second pushing component. Specifically, the long steel section 2 is placed on the conveyor roller frame 1, the equipment is started, and the conveyor rollers drive the steel section 2 forward. During the conveying process, the positioning mechanisms on both sides work continuously to constrain the lateral position of the steel section 2, ensuring its straight-line movement and correct posture. When the welding point of the steel section 2 moves to the welding station, the conveying stops. The first pusher component moves, accurately and stably pushing the single anchoring steel bar 202 in front of it along the preset path, so that its end is tightly abutted against the predetermined welding part of the steel section 2. After the anchoring steel bar 202 is pushed into place and held in position, the multi-axis robotic arm 4 drives the welding gun 401 to start. According to the preset welding program, such as welding trajectory, current, and speed parameters, the contact area between the anchoring steel bar 202 and the steel section 2 is automatically welded to form a strong weld. After the welding point is completed, the first pusher component... During the material component reset movement, the first material pushing component moves synchronously with the second material pushing component. Under the linkage, the second material pushing component moves a new anchoring steel bar 202 from the storage pile of the material box 3 to the preparation position in front of the first material pushing component, preparing for the next welding cycle. Then the conveyor roller frame 1 starts again, moving the steel section 2 forward by a fixed pitch, so that the next welding point accurately reaches the welding station. The equipment then repeats the above steps to perform the next "linked feeding-pushing-welding" cycle until the welding operation of all designated positions on the entire steel section 2 is completed. Material preparation is completed immediately after welding, shortening the waiting time between processes and forming an efficient and continuous automated production cycle, which significantly improves the overall production efficiency and is suitable for the batch processing of expansion joint steel sections 2.

[0023] like Figure 1 As shown, in a preferred embodiment, based on the above method, the positioning mechanism further includes an adjusting screw 5 threadedly connected to the side support plate 101 of the conveyor roller frame 1 and a positioning plate 501 movably disposed at the end of the adjusting screw 5; the positioning plate 501 is provided with a roller body 5011 that movably abuts against the side ear plate 201 of the profile steel 2 via a rotating shaft. Specifically, before starting batch processing, the operator manually rotates the adjusting screws 5 on both sides according to the specifications and dimensions of the steel section 2 to be processed, especially the width between the two ear plates 201. The rotation of the screws drives the positioning plate 501 at its end to move laterally until the roller 5011 on the positioning plate 501 gently contacts the side of the ear plate 201 on the side of the steel section 2. The two sides are adjusted synchronously so that the steel section 2 is accurately centered on the center line of the conveyor roller frame 1, and the roller 5011 and the ear plate 201 maintain an appropriate contact preload. After the equipment is started, the steel section 2 moves forward step by step under the drive of the conveyor roller. During the entire conveying process, since the positioning plates 501 on both sides continuously abut against the ear plate 201 of the steel section 2 through the roller 5011, a lateral constraint is formed to ensure that it does not twist or snake during the straight forward movement. At the same time, since the contact method is the rolling of the roller 5011, the sliding friction resistance between it and the ear plate 201 is greatly reduced.

[0024] like Figures 1-7 As shown, in a preferred embodiment, based on the above method, the material box 3 further includes a box body 301 fixedly connected to the positioning plate 501 by a connecting plate and a slide 302 provided at the end of the box body 301 and connected to the box body 301. The box body 301 has a storage cavity 3011 for storing the anchoring steel bar 202. The shape of the storage cavity 3011 matches the anchoring steel bar 202. Furthermore, the first pushing assembly includes a hydraulic cylinder 6 fixed to the bottom of the material box 3, a connecting plate 601 connected to the piston rod of the hydraulic cylinder 6, and a first push plate 602 fixedly connected to the connecting plate 601 via a connecting rod. The first push plate 602 slides within the slide rail 302. Furthermore, the second pushing assembly includes a threaded rod 7 rotatably connected to the material box 3, a sleeve 701 threadedly connected to the threaded rod 7 and sliding in the material box 3, and a second push plate 702 fixedly connected to the sleeve 701. The second push plate 702 slides in the storage cavity 3011. Furthermore, a one-way gear 8 is provided at the end of the threaded rod 7, and a rack plate 801 that meshes with the one-way gear 8 is provided on the connecting plate 601. The rack plate 801 is slidably disposed on the outside of the material box 3. Furthermore, a U-shaped limiting plate 9 is fixed on the connecting plate 601 by a connecting rod. The U-shaped limiting plate 9 moves against the ear plate 201 on the side of the steel section 2. A guide slope 901 is provided at the open end of the U-shaped limiting plate 9. Specifically, before the welding cycle begins, the storage cavity 3011 is filled with anchoring steel bars 202, and a steel bar is also placed inside the slide 302 at the end of the storage cavity 3011; the piston rod of the hydraulic cylinder 6 is in the extended state, and the connecting plate 601, the first push plate 602, the rack plate 801, and the U-shaped limiting plate 9 are all in the returned state away from the steel section 2; when feeding is required, the piston rod of the hydraulic cylinder 6 retracts, pulling the connecting plate 601 towards the steel section 2: The connecting plate 601 drives the first push plate 602 to move forward in the slide 302 through the connecting rod, pushing the anchor steel bar 202 pre-stored in the slide 302 forward until it is pushed out of the slide 302 and precisely pushed to the welding position with the steel section 2. The movement of the connecting plate 601 causes the rack plate 801 to move together. The rack plate 801 meshes with the one-way gear 8. Due to the characteristics of the one-way gear 8, the meshing in this direction is in a "slipping" or "idling" state. The threaded rod 7 does not rotate, and the second pusher assembly does not work at this stage. While the material is being pushed, the U-shaped limiting plate 9 fixed on the connecting plate 601 moves forward synchronously. Its guide slope 901 first contacts the ear plate 201 of the steel section 2. Under the guidance of the slope, the U-shaped limiting plate 9 automatically "locks into" the ear plate 201, thereby applying an instantaneous constraint to the steel section 2 in the longitudinal direction to prevent it from sliding on the circular conveyor roller and providing stable positioning for welding. After welding is completed, the piston rod of hydraulic cylinder 6 extends, pushing the connecting plate 601 to reset. The first push plate 602 retracts within the slide 302, returning to its starting position to make room for the next cycle. The reset of the connecting plate 601 causes the rack plate 801 to move in the opposite direction. At this time, the meshing direction of the rack plate 801 and the one-way gear 8 is the effective driving direction, driving the one-way gear 8 and the threaded rod 7 to rotate. The rotation of the threaded rod 7 drives the sleeve 701, which is threadedly engaged with it, to move laterally within the storage cavity 3011, thereby pushing the second push plate 702 to move the storage cavity 3011. The bottommost anchoring steel bar 202 is pushed into the vacated slide rail 302, completing the automatic material preparation action of "push one, prepare one". It should be noted that before the anchoring steel bar 202 in the storage cavity 3011 is pushed into the slide rail 302, the first push plate 602 has already passed the end opening of the storage cavity 3011, thereby avoiding collision between the pushed steel bar and the first push plate 602 in the return position; the U-shaped limiting plate 9 moves backward together with the connecting plate 601, disengaging from the contact with the ear plate 201 of the steel section 2, releasing the longitudinal constraint, and allowing the steel section 2 to continue to move forward and be conveyed.

[0025] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, in a preferred embodiment, based on the above method, the end of the slide 302 is further connected to an auxiliary channel 10 located below the side ear plate 201 of the steel section 2. The auxiliary channel 10 is rotatably provided with a swing plate 1002 on one side of the steel section 2 in the moving direction via a pin 1001. A torsion spring for driving the swing plate 1002 to reset and rotate is provided on the pin 1001. Specifically, when the anchoring rebar 202 is pushed out by the first pushing assembly, the rebar immediately enters and passes through the auxiliary channel 10. The inner wall of the auxiliary channel 10 provides precise constraint and guidance on the movement path of the rebar in the final stage, ensuring that it is accurately pushed to abut against the predetermined welding position on the lower side of the ear plate 201 of the steel section 2. During the welding operation, the inner wall of the auxiliary channel 10 plays a role in assisting the positioning and bottom support of the anchoring rebar 202, enhancing its stability during the welding process and preventing it from shifting due to gravity or welding operations. When a welding point is completed, the steel section 2, driven by the conveying rollers, carries the welded anchoring rebar. As 202 moves to the next workstation, the welded, protruding anchoring steel bar 202 moves forward along with the steel section 2. This steel bar exerts a forward thrust on the swing plate 1002, forcing the swing plate 1002 to overcome the torque of the torsion spring and rotate around the pin 1001 in the direction of movement of the steel section 2, thus making way for the passing anchoring steel bar 202. After the welded anchoring steel bar 202 has completely passed, the elastic potential energy stored in the torsion spring on the pin 1001 is released, driving the swing plate 1002 to automatically rotate in the opposite direction and return to its initial upright position, preparing for receiving new anchoring steel bars 202 and guiding their positioning.

[0026] This invention also discloses a welding method for processing road and bridge expansion joints, which involves welding using the aforementioned welding equipment for processing road and bridge expansion joints, and includes the following steps: S1: The long steel section 2 to be welded is hoisted and placed on the conveyor roller of the conveyor roller frame 1. Multiple anchoring steel bars 202 are neatly stacked in the storage cavity 3011 of the material box 3, and an anchoring steel bar 202 is pre-placed in the slide 302 connected to the end of the storage cavity 3011. S2: According to the specifications of the steel section 2, manually rotate the adjusting screws 5 installed on both sides of the conveyor roller frame 1. The adjusting screws 5 drive the positioning plate 501 to move inward until the roller body 5011 on the rotating shaft of the positioning plate 501 abuts against the ear plate 201 on the side of the steel section 2. The two positioning plates 501 work together to limit the left and right deviation and torsion of the steel section 2 during subsequent conveying. S3: The control system is activated, and the piston rod of the hydraulic cylinder 6 begins to retract. The piston rod, through the connecting plate 601, synchronously drives the first push plate 602, the rack plate 801, and the U-shaped limit plate 9 to move towards the section steel 2. S4: The U-shaped limiting plate 9 first contacts the ear plate 201, and its guide slope 901 guides the ear plate 201 to be inserted into the U-shaped groove. Before welding, it assists in limiting the steel section 2 to prevent it from sliding on the circular conveyor roller. The first push plate 602 moves forward in the slide 302, pushing the anchoring steel bar 202 that was pre-placed in the slide 302 forward. The steel bar enters the auxiliary channel 10 through the slide 302 and is precisely pushed to the preset welding position with the web plate and ear plate 201 of the steel section 2. The inner wall of the auxiliary channel 10 plays a temporary positioning role for the steel bar. During this process, the rack plate 801 meshes with the one-way gear 8, but due to the "one-way" characteristic of the gear, the threaded rod 7 is not driven to rotate at this time, and the second pusher assembly does not move. S5: After the anchoring steel bar 202 is in place, the multi-axis robotic arm 4 drives the welding gun 401 to move according to the preset program, and automatically welds the contact parts of the anchoring steel bar 202 with the steel section 2 and the ear plate 201. The support of the auxiliary channel 10 ensures the stability of the steel bar during welding. S6: After welding is completed, the piston rod of hydraulic cylinder 6 extends, and connecting plate 601 drives each component to reset; U-shaped limiting plate 9 and first push plate 602 disengage from their working positions. During the reset process, rack plate 801 moves in the opposite direction and meshes with one-way gear 8 to drive it to rotate. One-way gear 8 drives threaded rod 7 to rotate, causing sleeve 701 and second push plate 702 connected to it to move laterally in storage cavity 3011, thereby pushing the next anchoring steel bar 202 from storage cavity 3011 into the empty slide 302, preparing material for the next welding station. S7: The conveyor roller frame 1 starts, driving the steel section 2 with a welded anchor steel bar 202 to move forward one pitch, that is, the distance between the two ear plates 201. When the welded anchor steel bar 202 passes through the auxiliary channel 10, it will collide with and push away the swing plate 1002 hinged by the pin 1001. The swing plate 1002 can be reset under the action of the torsion spring, avoiding rigid collision between the welded steel bar and the fixed parts of the equipment. S8: After the steel section 2 is moved into place, the next ear plate 201 is located at the welding station. The equipment repeats the above steps and starts the next round of automated cycle of "pushing material-limiting-welding-resetting-preparing material-conveying" until the welding of all anchor steel bars 202 on the entire steel section 2 is completed.

[0027] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding equipment for processing road and bridge expansion joints, comprising a conveyor roller frame (1), characterized in that, Also includes: The positioning mechanism is provided in two sets, which are respectively set on both sides of the conveyor roller frame (1) for positioning the steel section (2) during conveying; The feeding mechanism, connected to the positioning mechanism, includes a material box (3) for holding the anchoring steel bars (202) and a first pushing component and a second pushing component arranged on the material box (3), the first pushing component and the second pushing component being arranged vertically; And welding components, including a multi-axis robotic arm (4) mounted on the conveyor roller frame (1) via a support plate and a welding torch (401) mounted at the end of the multi-axis robotic arm (4). The first pushing component is activated in conjunction with the second pushing component.

2. The welding equipment for processing road and bridge expansion joints according to claim 1, characterized in that, The positioning mechanism includes an adjusting screw (5) threadedly connected to the side support plate (101) of the conveyor roller frame (1) and a positioning plate (501) movably disposed at the end of the adjusting screw (5).

3. The welding equipment for processing road and bridge expansion joints according to claim 2, characterized in that, The positioning plate (501) is provided with a roller (5011) that moves against the side ear plate (201) of the steel section (2) via a rotating shaft.

4. The welding equipment for processing road and bridge expansion joints according to claim 3, characterized in that, The hopper (3) includes a box body (301) fixedly connected to a positioning plate (501) by a connecting plate and a slide (302) provided at the end of the box body (301) and connected to the box body (301). The box body (301) has a storage cavity (3011) for storing anchoring steel bars (202), and the shape of the storage cavity (3011) matches the anchoring steel bars (202).

5. The welding equipment for processing road and bridge expansion joints according to claim 4, characterized in that, The first pushing assembly includes a hydraulic cylinder (6) fixed at the bottom of the material box (3), a connecting plate (601) connected to the piston rod of the hydraulic cylinder (6), and a first push plate (602) fixedly connected to the connecting plate (601) via a connecting rod. The first push plate (602) slides in the slide rail (302).

6. The welding equipment for processing road and bridge expansion joints according to claim 5, characterized in that, The second pusher assembly includes a threaded rod (7) rotatably connected to the hopper (3), a sleeve (701) threadedly connected to the threaded rod (7) and sliding in the hopper (3), and a second pusher plate (702) fixedly connected to the sleeve (701). The second pusher plate (702) slides in the storage cavity (3011).

7. The welding equipment for processing road and bridge expansion joints according to claim 6, characterized in that, The end of the threaded rod (7) is provided with a one-way gear (8), and the connecting plate (601) is provided with a rack plate (801) that meshes with the one-way gear (8). The rack plate (801) is slidably disposed on the outside of the material box (3).

8. The welding equipment for processing road and bridge expansion joints according to claim 7, characterized in that, A U-shaped limiting plate (9) is also fixed on the connecting plate (601) by a connecting rod. The U-shaped limiting plate (9) moves against the ear plate (201) on the side of the steel section (2). The open end of the U-shaped limiting plate (9) is provided with a guide slope (901).

9. The welding equipment for processing road and bridge expansion joints according to claim 8, characterized in that, The end of the slide (302) is connected to an auxiliary channel (10) located below the side ear plate (201) of the steel section (2). The auxiliary channel (10) is rotatably provided with a swing plate (1002) on one side of the moving direction of the steel section (2) via a pin (1001). A torsion spring for driving the swing plate (1002) to reset and rotate is provided on the pin (1001).

10. A welding method for processing road and bridge expansion joints, comprising welding using the welding equipment for processing road and bridge expansion joints as described in claim 9, characterized in that... Includes the following steps: S1: The long steel section (2) to be welded is hoisted and placed on the conveying roller of the conveying roller frame (1). Multiple anchoring steel bars (202) are neatly stacked in the storage cavity (3011) of the material box (3), and an anchoring steel bar (202) is pre-placed in the slide (302) connected to the end of the storage cavity (3011). S2: According to the specifications of the steel section (2), manually rotate the adjusting screws (5) installed on both sides of the conveyor roller frame (1). The adjusting screws (5) drive the positioning plate (501) to move inward until the roller body (5011) on the rotating shaft of the positioning plate (501) abuts against the ear plate (201) on the side of the steel section (2). The positioning plates (501) on both sides work together to restrict the left and right offset and twisting of the steel section (2) during subsequent conveying. S3: The control system is started, the piston rod of the hydraulic cylinder (6) begins to retract, and the piston rod drives the first push plate (602), the rack plate (801) and the U-shaped limit plate (9) to move towards the section steel (2) in a synchronous manner through the connecting plate (601); S4: The U-shaped limiting plate (9) first contacts the ear plate (201), and its guide slope (901) guides the ear plate (201) to be inserted into the U-shaped groove. Before welding, the steel section (2) is auxiliaryly limited to prevent it from sliding on the circular conveyor roller. The first push plate (602) moves forward in the slide (302), pushing the anchoring steel bar (202) that was placed in the slide (302) forward. The steel bar enters the auxiliary channel (10) through the slide (302) and is precisely pushed to the preset welding position with the web and ear plate (201) of the steel section (2). The inner wall of the auxiliary channel (10) plays a temporary positioning role for the steel bar. During this process, the rack plate (801) meshes with the one-way gear (8), but due to the "one-way" characteristic of the gear, the threaded rod (7) is not driven to rotate at this time, and the second pusher assembly does not move; S5: After the anchoring steel bar (202) is in place, the multi-axis robotic arm (4) drives the welding gun (401) to move according to the preset program, and automatically welds the contact parts of the anchoring steel bar (202) with the steel section (2) and the ear plate (201). The support of the auxiliary channel (10) ensures the stability of the steel bar during welding. S6: After welding is completed, the piston rod of the hydraulic cylinder (6) extends, and the connecting plate (601) drives each component to reset; The U-shaped limiting plate (9) and the first push plate (602) are disengaged from their working positions. During the reset process, the rack plate (801) moves in the opposite direction and meshes with the one-way gear (8) to drive it to rotate. The one-way gear (8) drives the threaded rod (7) to rotate, causing the sleeve (701) and the second push plate (702) connected to it to move laterally in the storage cavity (3011), thereby pushing the next anchoring steel bar (202) from the storage cavity (3011) into the empty slide (302) to prepare the material for the next welding station. S7: The conveyor roller frame (1) starts, driving the steel section (2) with a welded anchor steel bar (202) to move forward by one pitch, that is, the distance between the two ear plates (201). When the welded anchor steel bar (202) passes through the auxiliary channel (10), it will collide with and push away the swing plate (1002) hinged by the pin (1001). The swing plate (1002) can be reset under the action of the torsion spring, avoiding the rigid collision between the welded steel bar and the fixed parts of the equipment. S8: After the section steel (2) is moved into place, the next ear plate (201) is located at the welding station. The equipment repeats the above steps and starts the next round of automated cycle of "pushing material - limiting position - welding - resetting - preparing material - conveying" until the welding of all anchor steel bars (202) on the entire section steel (2) is completed.

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