A welding fixture and welding method for bridge steel formwork

Abstract

This invention discloses a welding fixture and method for bridge steel formwork, belonging to the technical field of welding fixtures, specifically a welding fixture for bridge steel formwork. The fixture includes a support platform and a bearing plate. Two movable plates are slidably connected to the top of the support platform, and each movable plate extends slidably through the bearing plate and is fixed above it with a clamping plate. This invention allows the steel formwork to be welded to be positioned on the platform, and then limited by the clamping plates that move synchronously in opposite directions on both sides, eliminating the need for manual support. While the clamping plates limit the steel formwork, a pressure roller assembly simultaneously taps the frame and panel of the steel formwork, forcing them to fit tightly together. This solves the gap problem caused by uneven components and prevents the steel formwork from tilting due to the pressure of the clamping plates, thus avoiding any impact on the subsequent welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, specifically to a welding fixture and welding method for bridge steel formwork. Background Technology

[0002] Bridge steel formwork is an indispensable construction equipment in bridge construction, mainly used for the shaping of concrete structures. Through precise design and processing, it ensures that the concrete can form the required shape and size during the pouring process. Bridge steel formwork is mainly composed of panels, frame plates, and grid reinforcing ribs. Due to its high strength, high rigidity, high turnover rate, and high forming accuracy, it is widely used in bridge projects such as highways, railways, and municipal engineering. During the production and processing of steel formwork, the panels, frame plates, and grid reinforcing ribs need to be welded. Traditional welding methods rely on manual welding. When welding manually, one hand needs to hold the steel formwork for positioning and fitting. Due to the poor positioning accuracy of manual operation, there is a certain error in the welding accuracy, which is not conducive to improving the quality of the workpiece welding. Therefore, we propose a welding fixture and welding method for bridge steel formwork to solve the above problems. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a welding fixture and welding method for bridge steel formwork, solving the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0007] A welding fixture for bridge steel formwork includes a support platform and a bearing plate. Two movable plates are slidably connected to the top of the support platform. Each movable plate extends slidably through the bearing plate and is fixed above it with a clamping plate. A placement platform fixed to the top of the bearing plate is positioned between the two clamping plates. The steel formwork to be welded is placed on the top of the placement platform. A driving mechanism for driving the two clamping plates to move synchronously in opposite directions is provided on the top of the support platform. The driving mechanism includes a transmission shaft rotatably connected to the support platform via bearings. A transmission rod is fixed to the surface of the transmission shaft. Both ends of the transmission rod are rotatably connected to connecting rods via pins. The other ends of the connecting rods are rotatably connected to corresponding movable plates via pins. A motor is fixed to the bottom of the support platform, and the output end of the motor is fixedly connected to the bottom end of the transmission shaft. Pressure roller assemblies for top-limiting the steel formwork to be welded are installed on one side wall of each clamping plate.

[0008] Furthermore, the pressure roller assembly includes two connecting blocks fixed to one side wall of the clamping plate, and a connecting plate is fixed to the top of each connecting block. A limit pressure roller is rotatably connected between the two connecting plates via a bearing.

[0009] Furthermore, a rotating shaft is rotatably connected between the two connecting blocks via a bearing. Two cams are fixed to the surface of the rotating shaft, and a mounting plate fixed to one side wall of the clamping plate is provided between the two cams. Guide blocks are fixed to both sides of the mounting plate. Lifting frames slide inside the through holes opened at the top of the guide blocks. Springs are fixed to the bottom inner walls of the lifting frames. The tops of the springs are fixedly connected to the corresponding guide blocks. A rotating shaft is rotatably connected to the side walls of the lifting frames via a bearing. Two annular sleeves are fixed to the surface of the rotating shaft.

[0010] Furthermore, two gears are fixed to the surface of the rotating shaft, and racks are fixed to both sides of the bearing plate. The gears are respectively meshed with the corresponding racks.

[0011] Furthermore, it also includes an ejection assembly for lifting the welded steel template. The ejection assembly includes two lifting plates disposed below the support platform. Lifting frames are fixed to both side walls of the two lifting plates. The top of each lifting frame slides through the support platform and the bearing plate and extends above them. Two springs are fixed to the top of each lifting plate. The top of each spring is fixedly connected to the bottom of the support platform.

[0012] Furthermore, each of the two lifting plates has a U-shaped plate fixed to the bottom of the support platform on one side. Each U-shaped plate is rotatably connected to a rotating shaft three via bearings. Each rotating shaft three has two flip plates fixed to its surface for lifting the lifting plates. The bottom of the support platform has two guide rails fixed, and each guide rail has two racks two slidably connected to it. Each rack two has a spring three fixed to one end, and the other end of each spring three is fixedly connected to the corresponding guide rail. Each rotating shaft three has a gear two fixed to its surface, and each gear two meshes with the corresponding rack two. Each rack two has a push block fixed to one side wall, and each of the two clamping plates has two push plates fixed to its surface.

[0013] Furthermore, the top of the placement platform is equipped with four sets of universal ball bearing assemblies.

[0014] Furthermore, the top of the support platform has two T-shaped guide grooves, and the bottom of each movable plate has two T-shaped guide blocks that are adapted to the T-shaped guide grooves.

[0015] A welding method for a bridge steel formwork welding fixture includes the following steps:

[0016] S1: First, place the panel and frame of the steel template to be welded on the placement table. Then, the two clamping plates can be driven to move closer to each other through the drive mechanism. When the two clamping plates move closer to each other, they can be clamped and limited. After positioning the two, the welding operation can be carried out.

[0017] S2: When the clamping plates on both sides approach each other, they will drive the pressure roller assembly to move synchronously. At this time, the pressure roller assembly can reciprocate to strike the panel and frame and limit their upper position, thereby preventing the two from tilting horizontally after being clamped by the clamping plates.

[0018] S3: After welding is completed, when the two clamping plates move away from each other and continue to move, the clamping plates can drive the ejector component to work. After the ejector component works, it can lift the welded steel template to a certain height so that the workers can remove the welded steel template later.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides a welding fixture and welding method for bridge steel formwork, which has the following beneficial effects:

[0021] This invention allows for the placement of a steel template to be welded on a platform, where clamping plates on both sides move in opposite directions synchronously to limit its position, eliminating the need for manual support. Simultaneously, the clamping plates limit the steel template while a pressure roller assembly strikes the frame and panel within the template, forcing them into a tight fit. This solves the gap problem caused by uneven components and prevents the template from tilting due to the clamping plates, thus avoiding any impact on subsequent welding quality. Furthermore, after welding, the ejector assembly automatically ejects the template to a certain height for easy removal later. Attached Figure Description

[0022] Figure 1 This is a first-view schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a second-view schematic diagram of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the bearing plate structure of the present invention;

[0025] Figure 4 This is a first-view schematic diagram of the support platform structure of the present invention;

[0026] Figure 5 This is a second-view schematic diagram of the support platform structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the pressure roller assembly structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the placement platform structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the movable plate structure of the present invention.

[0030] In the diagram: 1. Support platform; 2. Movable plate; 3. Clamping plate; 4. Placement platform; 5. Drive mechanism; 501. Drive shaft; 502. Drive rod; 503. Connecting rod; 504. Motor; 6. Pressure roller assembly; 601. Connecting block; 602. Connecting plate; 603. Limiting pressure roller; 604. Rotating shaft one; 605. Cam; 606. Mounting plate; 607. Guide block; 608. Lifting frame; 609. Spring one; 610. Rotating shaft two; 611. 7. Ring sleeve; 612. Gear 1; 613. Rack 1; 7. Ejection assembly; 701. Lifting plate; 702. Lifting frame; 703. Spring 2; 704. U-shaped plate; 705. Rotating shaft 3; 706. Tilting plate; 707. Guide rail; 708. Rack 2; 709. Spring 3; 710. Gear 2; 711. Push block; 712. Push plate; 8. Universal ball bearing assembly; 9. T-shaped guide groove; 10. T-shaped guide block; 11. Bearing plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown in one embodiment of the present invention, a bridge steel formwork welding fixture includes a support platform 1 and a bearing plate 11. Two movable plates 2 are slidably connected to the top of the support platform 1. The top of each movable plate 2 slides through the bearing plate 11 and extends above it, where a clamping plate 3 is fixed. Two T-shaped guide grooves 9 are provided on the top of the support platform 1. Two T-shaped guide blocks 10, adapted to the T-shaped guide grooves 9, are fixed to the bottom of each movable plate 2. Through the cooperation of the T-shaped guide grooves 9 and the T-shaped guide blocks 10, the movable plates 2 can be provided with auxiliary support, thus making them more stable during movement. A placement platform 4 is provided between the two clamping plates 3 and fixed to the top of the bearing plate 11. A universal ball bearing assembly 8 is installed on the top of the placement platform 4. There are four sets of universal ball bearing assemblies 8. The universal ball bearings in the assembly are limited and installed inside the mounting base, preventing them from falling off. Using the universal ball bearing assembly 8, workers can move the steel template to be welded closer to the top of the placement platform 4 with less effort, reducing friction between the template and the platform. Also, when the two clamping plates 3 clamp the template, the template's center position may be slightly off during placement. When the clamping plates 3 press against the template, friction between the template and the platform is prevented. The steel template is placed on top of the platform 4, and the top of the support platform 1 is equipped with a useful... The drive mechanism 5 drives the two clamping plates 3 to move synchronously in opposite directions. The drive mechanism 5 includes a transmission shaft 501 rotatably connected to the support platform 1 via bearings. A transmission rod 502 is fixed to the surface of the transmission shaft 501. Both ends of the transmission rod 502 are rotatably connected to connecting rods 503 via pins. The other ends of the connecting rods 503 are rotatably connected to the corresponding moving plates 2 via pins. A motor 504 is fixed to the bottom of the support platform 1. The output end of the motor 504 is fixedly connected to the bottom end of the transmission shaft 501. Each side wall of the clamping plates 3 is equipped with a pressure roller assembly 6 for top positioning of the steel template to be welded. During the welding process of this bridge steel template, the steel template is usually welded to the panel and the frame first, and then the grid reinforcing ribs are welded. Therefore, the steel template to be welded placed on the placement platform 4 consists of a panel and a frame. After the welding of the two is completed, the worker can move and reset the clamping plate 3, and then place the mesh reinforcing plate inside the frame plate before continuing welding, as shown in the figure. After placing the panel and frame plate on the top of the placement platform 4, the motor 504 with self-locking speed regulation function can be started to drive the transmission shaft 501 to rotate. The rotation of the transmission shaft 501 will drive the transmission rod 502 to rotate, and the rotation of the transmission rod 502 will drive the two connecting rods 503 to rotate. At this time, with the cooperation of the two connecting rods 503, the two clamping plates 3 can be moved closer to each other. When the two clamping plates 3 are close to each other, they can limit and clamp the placed panel and frame plate. And due to the shape of the two clamping plates 3,Both clamping plates and frames of different sizes can be used to clamp them. When the clamping plate 3 moves, it drives the pressure roller assembly 6 to move as well. The pressure roller assembly 6 then reciprocates and taps the panel and frame, limiting their position and ensuring a tight fit. This prevents any tilting or horizontal deviation after clamping. After the steel template to be welded is clamped and limited, it can be welded manually or automatically. After welding, resetting the clamping plates 3 on both sides and continuing to move them drives the ejector assembly 7 to lift the welded steel template to a certain height, making it easy for workers to remove it.

[0034] like Figure 1 , Figure 3 and Figure 6As shown, in some embodiments, the pressure roller assembly 6 includes two connecting blocks 601 fixed to one side wall of the clamping plate 3. A connecting plate 602 is fixed to the top of each connecting block 601. A limiting pressure roller 603 is rotatably connected between the two connecting plates 602 via a bearing. A rotating shaft 604 is rotatably connected between the two connecting blocks 601 via a bearing. Two cams 605 are fixed to the surface of the rotating shaft 604. A mounting plate 606 fixed to one side wall of the clamping plate 3 is disposed between the two cams 605. Guide blocks 607 are fixed to both sides of the mounting plate 606. A lifting frame 608 slides inside a through hole at the top of the guide block 607. A spring 609 is fixed to the bottom inner wall of each lifting frame 608. The top of each spring 609 is respectively connected to the corresponding guide block. 607 is fixedly connected. The side walls of the lifting frame 608 are rotatably connected to the second rotating shaft 610 via bearings. Two annular sleeves 611 are fixed to the surface of the second rotating shaft 610, and two gears 612 are fixed to the surface of the second rotating shaft 610. The two side walls of the bearing plate 11 are fixed with racks 613. The gears 612 mesh with the corresponding racks 613. In use, when the clamping plate 3 moves, it will drive the connecting block 601 to move. After the connecting block 601 moves, it will drive the limiting pressure rollers 603 on the two connecting plates 602 to squeeze the frame plate, so that the frame plate and the panel are tightly fitted. When the clamping plate 3 drives the connecting block 601 to move, with the cooperation of the gears 612 and racks 613, the rotating shaft can be driven. When shaft 604 rotates, it drives two cams 605 on its surface to rotate. The rotation of cams 605 then drives the lifting frame 608 to move upwards. Once the cams 605 release their pressure on the lifting frame 608, the spring 609's reset force drives the lifting frame 608 to return to its original position. Therefore, the lifting frame 608 drives the annular sleeve 611 to reciprocate and strike the frame plate in the steel template to be welded, forcing the frame plate and panel to fit tightly together. This prevents gaps caused by burrs on the surfaces of the two plates during the fit, reducing potential defects such as incomplete welds and porosity during welding. This provides a better foundation for subsequent welding operations. Furthermore, the frame plate is first struck before being positioned. The pressure roller 603 presses and adheres the frame plate to the panel. After the frame plate and panel are tapped together, the upper position is directly limited by the limiting pressure roller 603 to prevent them from not being tightly adhered. In order to prevent the annular sleeve 611 from damaging the frame plate of the steel template during the tapping process, it can be made of plastic. In addition, since the limiting pressure roller 603 rotates between the two connecting plates 602, and the annular sleeve 611 is fixed on the surface of the rotating shaft 610, the two can rotate. Thus, when the frame plate is moved after being tapped and limited, the limiting pressure roller 603 and the annular sleeve 611 roll while limiting the frame plate, so that the moving friction generated after the two come into contact with the frame plate becomes rolling friction, which helps to protect the frame plate.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, in some embodiments, an ejection assembly 7 for lifting the welded steel template is also included. The ejection assembly 7 includes two lifting plates 701 disposed below the support platform 1. Lifting frames 702 are fixed to both side walls of the two lifting plates 701. The tops of the lifting frames 702 slide through the support platform 1 and the bearing plate 11 and extend above them. Two springs 703 are fixed to the top of each lifting plate 701. The tops of the springs 703 are fixedly connected to the bottom of the support platform 1. A U-shaped plate 704 fixed to the bottom of the support platform 1 is provided on one side of each lifting plate 701. A rotating shaft 705 is rotatably connected to each U-shaped plate 704 via bearings. Two bearings are fixed to the surface of each rotating shaft 705 for... The tilting plate 706, which lifts the lifting plate 701, has two guide rails 707 fixed to the bottom of the support platform 1. Two racks 708 are slidably connected to each guide rail 707, with a spring 709 fixed to one end of each rack 708. The other end of each spring 709 is fixedly connected to the corresponding guide rail 707. Gears 710 are fixed to the surface of the rotating shaft 705, meshing with the corresponding racks 708. Push blocks 711 are fixed to one side wall of each rack 708. Two push plates 712 are fixed to the surfaces of the two clamping plates 3. During use, when the two clamping plates 3 move closer together, they will cause the push plates 712 on both sides to move closer together. However, at this time... The movement of the push plate 712 does not push the push block 711 to move. When the two clamping plates 3 move away from each other, they will also drive the push plates 712 on both sides to move. At this time, after the push plates 712 on both sides move away from each other, they will drive the push blocks 711 to move respectively. After the push blocks 711 move, they will drive the rack 2 708 to move. After the rack 2 708 moves, the spring 3 709 is in a stretched state. When the rack 2 708 moves, it will drive the gear 2 710 to rotate. When the gear 2 710 rotates, it can drive the rotating shaft 3 705 to rotate. At this time, when the rotating shafts 3 705 on both sides rotate synchronously in opposite directions, they will drive the tilting plate 706 to rotate respectively. After the tilting plate 706 rotates, it will push the lifting plate 701 to move upward. After the lifting plate 701 moves upward, the second spring 703 will be in a compressed state. When the lifting plate 701 moves upward, it will drive the lifting frame 702 to move upward. At this time, under the action of the lifting frame 702, the welded steel template can be lifted to a certain height so that the workers can remove it. After the welded steel template is removed, the clamping plates 3 on both sides can be driven to move and reset. When the clamping plates 3 move and reset to the initial position, the rack 708 can be driven to reset under the action of the third spring 709, which can then cause the flipping plates 706 on both sides to rotate and reset. Under the action of the second spring 703, the lifting plate 701 can be reset, which in turn can reset the lifting frame 702, so as to facilitate the next lifting operation.

[0036] A welding method for a bridge steel formwork welding fixture includes the following steps:

[0037] S1: First, place the panel and frame of the steel template to be welded on the placement platform 4. Then, the two clamping plates 3 can be driven to move closer to each other through the drive mechanism 5. When the two clamping plates 3 move closer to each other, they can be clamped and limited. After positioning the two, the welding operation can be carried out.

[0038] S2: When the clamping plates 3 on both sides approach each other, they will drive the pressure roller assembly 6 to move synchronously. At this time, the pressure roller assembly 6 can reciprocate to strike the panel and frame and limit their upper position, thereby preventing the two from tilting horizontally after being clamped by the clamping plates 3.

[0039] S3: After welding is completed, when the two clamping plates 3 move away from each other and continue to move, the clamping plates 3 can drive the ejector assembly 7 to work. After the ejector assembly 7 works, it can lift the welded steel template to a certain height so that the workers can remove the welded steel template later.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bridge steel formwork welding tooling comprising a support table and a bearing plate, characterized in that: The top of the support table is slidably connected with two moving plates, the top of the moving plate is slidably connected with a clamping plate, two clamping plates are arranged between the placing table fixed on the top of the bearing plate, the top of the placing table is placed with a steel template to be welded, the top of the support table is provided with a driving mechanism for driving the two clamping plates to move synchronously and reversely, the driving mechanism comprises a transmission shaft rotatably connected to the support table by a bearing, the surface of the transmission shaft is fixed with a transmission rod, the two ends of the transmission rod are rotatably connected with connecting rods by pins, the other end of the connecting rod is rotatably connected with the corresponding moving plate by a pin, the bottom of the support table is fixed with a motor, the output end of the motor is fixedly connected with the bottom end of the transmission shaft, the side wall of the clamping plate is provided with a compression roller assembly for limiting the top of the steel template to be welded, the compression roller assembly comprises two connecting blocks fixed on the side wall of the clamping plate, the top of the connecting block is fixed with a connecting plate, the two connecting plates are rotatably connected with a limiting compression roller through a bearing, the two connecting blocks are rotatably connected with a rotating shaft one through a bearing, the surface of the rotating shaft one is fixed with two cams, the two cams are arranged between the mounting plate fixed on the side wall of the clamping plate, the two side walls of the mounting plate are fixed with guide blocks, the top of the guide block is slidably connected with a lifting frame, the bottom inner wall of the lifting frame is fixed with a spring one, the top end of the spring one is fixedly connected with the corresponding guide block, the side wall of the lifting frame is rotatably connected with a rotating shaft two through a bearing, the surface of the rotating shaft two is fixed with two ring sleeves, the surface of the rotating shaft two is fixed with two gears one, the two side walls of the bearing plate are fixed with a rack one, and the gear one is rotatably connected with the corresponding rack one.

2. The bridge steel formwork welding tooling of claim 1, wherein: It also includes an ejection assembly for lifting the welded steel template, the ejection assembly comprises two lifting plates arranged below the support table, the two side walls of the lifting plate are fixed with a lifting frame, the top of the lifting frame is slidably connected through the support table and the bearing plate and extends above them, the top of the lifting plate is fixed with two springs two, and the top end of the spring two is fixedly connected with the bottom of the support table.

3. The bridge steel form welding tooling of claim 2, wherein: The side of the two lifting plates is provided with a U-shaped plate fixed on the bottom of the support table, the rotating shaft three is rotatably connected with the U-shaped plate through a bearing, the surface of the rotating shaft three is fixed with two turnover plates for lifting the lifting plate, the bottom of the support table is fixed with two guide rails, the two guide rails are slidably connected with two racks two, one end of the rack two is fixed with a spring three, the other end of the spring three is fixedly connected with the corresponding guide rail, the surface of the rotating shaft three is fixed with a gear two, the gear two is rotatably connected with the corresponding rack two, and the side wall of the rack two is fixed with a pushing block.

4. The bridge steel form welding tooling of claim 1, wherein: The top of the placing table is provided with a universal ball assembly, and the number of the universal ball assembly is four.

5. The bridge steel form welding tooling of claim 1, wherein: The top of the support table is provided with two T-shaped guide sliding grooves, and the bottom of the moving plate is fixed with two T-shaped guide sliding blocks matched with the T-shaped guide sliding grooves.

6. A method of welding a bridge steel formwork welding jig according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: S1: first, the component panel and frame panel of the steel template to be welded are placed on the placing table, then the two clamping plates are driven to move close to each other by the driving mechanism, and the panel and frame panel are clamped and positioned, and then welding is performed; S2: when the two clamping plates move close to each other, the pressure roller assembly is driven to move synchronously, and the pressure roller assembly can reciprocatingly knock the panel and frame panel and position the upper part of the panel and frame panel, so that the panel and frame panel will not be inclined when clamped by the clamping plates; S3: after welding, when the two clamping plates move away from each other and continue to move, the ejection assembly is driven to work, and after the ejection assembly works, the welded steel template is lifted to a certain height, so that the worker can take down the welded steel template.

Images