Bridge steel frame welding device
By designing a bridge steel frame welding device, and utilizing permanent magnet adsorption blocks and a precise angle adjustment mechanism, the problems of welding torch vibration and angle deviation in manual welding were solved, achieving high-quality and efficient welding results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 陕西省交通规划设计研究院有限公司
- Filing Date
- 2026-03-31
- Publication Date
- 2026-05-08
AI Technical Summary
In bridge steel structure construction, manual welding of stiffening ribs is prone to fatigue, which can cause the welding torch to shake or deviate at an angle, affecting the welding quality and consistency.
The bridge steel frame welding device utilizes a switchable permanent magnet adsorption block fixing device, combined with an angle adjustment mechanism, linear slide rail, and fine adjustment mechanism, to precisely set and lock the working angle of the welding torch, providing stable linear guidance and position adjustment.
It improves the consistency of weld quality and welding efficiency, solves the problems of easy angle deviation, non-straight path and unstable quality in manual welding, and enhances the convenience of operation and welding efficiency.
Smart Images
Figure CN224209331U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding technology, and in particular to a welding apparatus for bridge steel frames. Background Technology
[0002] In the construction of bridge steel structures, a large number of longitudinal or transverse stiffening ribs need to be welded to the web of components such as H-beams and box girders to enhance their local stability. The connection between the stiffening ribs and the web is usually a continuous fillet weld. Although such welds are relatively short (usually tens of centimeters to several meters), there are many of them, and there are high requirements for welding quality and consistency.
[0003] Currently, manual welding is commonly used when welding such stiffening ribs on construction sites. Welders rely entirely on experience and handheld welding torches to operate the equipment. This method has significant drawbacks: the working angle (angle with the web plate) and travel angle of the welding torch depend entirely on the welder's arm posture. During the welding process, fatigue can easily cause shaking or angle deviation, resulting in uneven weld penetration, rough appearance, and affecting welding quality. Utility Model Content
[0004] To address the problem of vibration or angular deviation easily caused by fatigue during welding, this application provides a bridge steel frame welding device.
[0005] The bridge steel frame welding device provided in this application adopts the following technical solution:
[0006] A bridge steel frame welding device includes a base. Multiple switchable permanent magnet adsorption blocks for adsorbing and fixing onto the surface of the steel structure web are installed at the bottom of the base. An angle adjustment mechanism is installed at the top of the base. A linear slide rail is fixed to the angle adjustment output end of the angle adjustment mechanism. A slide block is slidably mounted on the linear slide rail. A fine-tuning mechanism is installed on the side of the slide block away from the angle adjustment mechanism. A welding mechanism is installed on the adjustment end of the fine-tuning mechanism. The fine-tuning mechanism includes a groove fixed to the slide block. A lifting block for positioning is slidably connected inside the groove block. The welding mechanism includes an extension frame, which is fixedly connected to the lifting block.
[0007] Preferably, the angle adjustment mechanism includes a rotating seat mounted on the top of the base, an angle adjustment ring rotatably mounted on the top of the rotating seat, a connecting seat connected to a linear slide rail fixed on one side of the angle adjustment ring, annularly distributed scale lines on the outer side of the angle adjustment ring, and a locking member for fixing the angle adjustment ring on one side of the top of the rotating seat.
[0008] Preferably, the locking element includes an extension block fixed to one side of the rotating seat, the extension block being threaded with a locking bolt, and the angle adjusting ring having a plurality of annularly distributed locking holes, the locking bolt passing through one of the locking holes.
[0009] Preferably, the slot seat has a lifting slot, the lifting block is slidably installed in the lifting slot, the top of the slot seat is rotatably installed with a fine-tuning screw threaded into the lifting block, the top of the lifting block is fixed with a guide post, and the top of the guide post penetrates the outer wall of the top of the slot seat.
[0010] Preferably, one end of the extension frame is fixed with a clamping ring, and a welding torch is disposed inside the clamping ring.
[0011] In summary, this application includes at least one of the following beneficial technical effects:
[0012] This invention relates to a welding device that utilizes a strong magnetic adsorption block for rapid positioning and disassembly. An angle adjustment mechanism and locking element precisely set and lock the welding torch's working angle. A linear guide rail and slide block provide stable linear guidance for the welding torch, and a fine-tuning mechanism aligns the end position of the welding torch. This effectively solves the problems of easy angle deviation, non-straight path, unstable quality, and low operational efficiency in manual welding, improving the consistency of weld quality, welding efficiency, and ease of operation. Attached Figure Description
[0013] Figure 1 This is a three-dimensional schematic diagram of the present application;
[0014] Figure 2 This is a three-dimensional schematic diagram of the angle adjustment mechanism in this application;
[0015] Figure 3 This is a three-dimensional schematic diagram of the welding working state of this application;
[0016] Figure 4 This is a three-dimensional schematic diagram of the welding mechanism in this application;
[0017] Figure 5 This is a three-dimensional schematic diagram of the fine-tuning mechanism in this application.
[0018] Figure label:
[0019] 1. Base; 2. Switchable permanent magnet adsorption block; 3. Angle adjustment mechanism; 31. Rotating seat; 32. Angle adjustment ring; 33. Connecting seat; 34. Locking hole; 35. Extension block; 36. Locking bolt; 4. Linear slide rail; 5. Slide seat; 6. Fine adjustment mechanism; 61. Slot seat; 62. Lifting slot; 63. Lifting block; 64. Fine adjustment screw; 65. Guide column; 7. Handle; 8. Welding mechanism; 81. Extension frame; 82. Clamping ring; 83. Welding torch. Detailed Implementation
[0020] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.
[0021] This application discloses a bridge steel frame welding device.
[0022] Reference Figure 1 , Figure 2 and Figure 3 A bridge steel frame welding device includes a base 1, which serves as the installation reference platform for the device. The base 1 is preferably a rectangular frame structure cut and welded from Q235B steel plate, possessing sufficient rigidity to support the upper structure. Four switchable permanent magnet adsorption blocks 2 are symmetrically installed at the bottom of the base 1. These switchable permanent magnet adsorption blocks 2 are preferably manually operated permanent magnet chucks, each with a rated adsorption force of at least 80 kgf, and a total adsorption force of at least 320 kgf, sufficient to reliably adsorb the weight of the device and welding torch cable in the overhead welding position. A switch handle is provided on the side of the chuck; rotating it 90° switches the magnetic circuit on and off. By opening the switch handle of the switchable permanent magnet adsorption block 2, the entire device can be instantly adsorbed and fixed to a flat steel surface such as the web or wing of the bridge steel structure using strong magnetic force, achieving rapid installation and positioning of the device. Removal is achieved by simply turning off the magnetic force, without damaging the workpiece surface.
[0023] Reference Figure 1 , Figure 2 and Figure 3 An angle adjustment mechanism 3 is fixedly installed at the top center of the base 1 by bolts. The angle adjustment mechanism 3 includes a cylindrical rotating seat 31, which is fastened to the base 1 by a flange at its bottom. An angle adjustment ring 32 is rotatably installed at the top of the rotating seat 31 by a set of deep groove ball bearings. The bearings provide smooth rotational support for the angle adjustment ring 32 and bear axial loads. Angle scale lines from 0 to 360° are precisely etched on the angle adjustment ring 32, with a long scale line every 5° and a short scale line every 1° for easy accurate reading. A series of locking holes 34 are provided at equal intervals (e.g., every 15°) along the circumference next to the angle scale lines.
[0024] A connecting seat 33 is welded and fixed to the outer circumference of the angle adjusting ring 32. An extension block 35 is welded and fixed to one side of the top of the rotating seat 31. A locking bolt 36 is vertically threaded onto the extension block 35. The end of the locking bolt 36 can be screwed into any one of the locking holes 34 of the angle adjusting ring 32.
[0025] When the angle adjustment ring 32 is rotated to the required angle, such as 45° commonly used for welding fillet welds, tighten the locking bolt 36 so that its end is tightly pressed into or completely passes through the corresponding locking hole 34. This will rigidly lock the angle adjustment ring 32 and the rotating seat 31, thereby controlling the tilt angle of the linear slide rail 4 in space, i.e., the working angle of the welding torch 83.
[0026] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 A linear slide rail 4 is bolted to one side of the connecting seat 33. The linear slide rail 4 is a dual-axis guide rail (SGR series). A slide block 5 is slidably mounted on the linear slide rail 4. The slide block 5 is made of aluminum alloy and contains three or four roller bearings. It cooperates with the linear slide rail 4. A damping adjustment screw is provided on the side of the slide block, which presses against the internal POM (polyoxymethylene) friction block. The welder can adjust the resistance when pushing the slide block by tightening or loosening this screw, thereby obtaining a "smooth" sliding damping feel. To eliminate hand tremors, a fine-tuning mechanism 6 is fixed to one side of the slide block 5 by screws. The fine-tuning mechanism 6 includes a slot 61 fixed to the outside of the slide block 5. A T-shaped lifting slot 62 is provided on the slot 61. A lifting block 63 slides up and down in the lifting slot 62. A fine-tuning screw 64 is rotatably installed on the top of the slot 61 through a bearing seat. The threaded section of the fine-tuning screw 64 is screwed downward into a pre-set threaded hole on the top of the lifting block 63. An anti-loosening damping ring is embedded on the fine-tuning screw 64 to prevent vibration from loosening.
[0027] By rotating the knob on the top of the fine-tuning screw 64, the lifting block 63 can be driven to move up and down precisely with a movement accuracy of 0.1mm. To further eliminate the rotational freedom that may be generated by the screw drive, a guide post 65 is also fixed to the top of the lifting block 63. The smooth section at the top of the guide post 65 slides into the guide hole in the top plate of the slot seat 61, ensuring that the lifting block 63 can only move vertically. A handle 7 is also welded to one side of the slot seat 61, which is convenient for the operator to hold and manually push the entire slide 5 along the linear slide rail 4 to perform linear welding work. A welding mechanism 8 is installed on the adjustment end of the fine-tuning mechanism 6.
[0028] Reference Figure 1 and Figure 4 The welding mechanism 8 includes an extension frame 81 that is bolted to the lifting block 63. A clamping ring 82 is welded to the end of the extension frame 81. The clamping ring 82 is composed of two semicircular rings connected by fastening bolts. The clamping ring 82 is lined with a high-temperature resistant silicone or asbestos pad to increase friction and protect the welding torch 83. The clamping ring 82 is used to clamp and fix the neck of a standard manual welding torch 83.
[0029] By rotating the fine-tuning screw 64 to adjust the height of the lifting block 63, the height of the welding torch tip 83 relative to the weld can be controlled. By loosening the fastening bolt, the welding torch 83 can be quickly replaced or adjusted on the clamping ring 82.
[0030] The implementation principle of a bridge steel frame welding device according to an embodiment of this application is as follows:
[0031] Before welding the stiffening rib fillet weld of the bridge steel structure, first place the device on the web of the steel structure, so that the linear slide rail 4 is roughly parallel to the direction of the weld to be welded, open the switch handle of the switchable permanent magnet adsorption block 2, and firmly adsorb and fix the device.
[0032] Then, according to the standard working angle required by the welding process specification, such as 45°, observe the scale on the angle adjustment ring 32, manually rotate the angle adjustment ring 32, and drive the connecting seat 33 and the linear slide rail 4 on it to rotate together until the scale is aligned with the required angle. Screw the locking bolt 36 into the corresponding locking hole 34 and tighten it to complete the angle locking.
[0033] Next, the welding torch 83 is inserted into the clamping ring 82 and locked. By rotating the knob of the fine-tuning screw 64, the height of the lifting block 63 is finely adjusted, so that the tip of the welding torch 83 is adjusted to the optimal position from the arc starting point of the weld, about 2 to 3 times the diameter of the welding wire.
[0034] After preparation, the welder starts the welding machine, holds the handle control switch of the welding torch 83 with one hand, and holds the handle 7 with the other hand, and pushes the slide block 5 along the linear slide rail 4 from the start point to the end point of the weld at a uniform speed. Since the linear slide rail 4 provides linear guidance and its angle has been locked, it can ensure that the welding torch 83 maintains a constant working angle and travel trajectory throughout the welding process, and produces a high-quality fillet weld with high straightness, good forming consistency and consistent penetration depth in one go.
[0035] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A bridge steel frame welding device, comprising a base (1), characterized in that: The base (1) has multiple switchable permanent magnet adsorption blocks (2) installed at the bottom for adsorption and fixation on the surface of the steel structure web plate. The base (1) has an angle adjustment mechanism (3) installed at the top. The angle adjustment output end of the angle adjustment mechanism (3) is fixed with a linear slide rail (4). A slide block (5) is slidably installed on the linear slide rail (4). A fine adjustment mechanism (6) is installed on the side of the slide block (5) away from the angle adjustment mechanism (3). A welding mechanism (8) is installed on the adjustment end of the fine adjustment mechanism (6). The fine adjustment mechanism (6) includes a slot seat (61) fixed on the slide block (5). A lifting block (63) for positioning is slidably connected inside the slot seat (61). The welding mechanism (8) includes an extension frame (81). The extension frame (81) is fixedly connected to the lifting block (63).
2. The bridge steel frame welding device according to claim 1, characterized in that: The angle adjustment mechanism (3) includes a rotating seat (31) mounted on the top of the base (1). An angle adjustment ring (32) is rotatably mounted on the top of the rotating seat (31). A connecting seat (33) connected to the linear slide rail (4) is fixed on one side of the angle adjustment ring (32). The outer side of the angle adjustment ring (32) is provided with annularly distributed scale lines. A locking member for fixing the angle adjustment ring (32) is provided on one side of the top of the rotating seat (31).
3. The bridge steel frame welding device according to claim 2, characterized in that: The locking component includes an extension block (35) fixed on one side of the rotating seat (31), and a locking bolt (36) is threaded onto the extension block (35). The angle adjusting ring (32) has a plurality of annularly distributed locking holes (34) circumferentially opened, and the locking bolt (36) passes through one of the locking holes (34).
4. The bridge steel frame welding device according to claim 1, characterized in that: The slot seat (61) is provided with a lifting slot (62), the lifting block (63) is slidably installed in the lifting slot (62), the top of the slot seat (61) is rotatably installed with a fine adjustment screw (64) threaded into the lifting block (63), the top of the lifting block (63) is fixed with a guide post (65), and the top of the guide post (65) penetrates the outer wall of the top of the slot seat (61).
5. The bridge steel frame welding device according to claim 1, characterized in that: One end of the extension frame (81) is fixed with a clamping ring (82), and a welding torch (83) is provided inside the clamping ring (82).