A steel truss welding fixing frame and a welding working method thereof

Abstract

The application provides a fixing frame for steel truss welding, which comprises a fixing base, a rotating base movably installed on the top of the fixing base, a limiting base movably installed on the rotating base, a limiting groove formed in the limiting base, a fixing assembly fixedly installed on the rotating base, a lifting mechanism and a positioning assembly respectively installed on the fixing assembly, a fixing block fixed to one end of the lifting mechanism and the positioning assembly, a support frame welded to one side of the fixing block, and a fixing plate and a support plate movably installed in the support frame. In use, the fixing plate and the support plate are moved to realize extrusion limiting of the steel frame. In the later stage, the extrusion base and the threaded base are driven by the driving motor to complete extrusion of the fixing plate and the support plate. The fixing plate and the support plate complete clamping limiting of the steel frame under extrusion, and the limiting hole and the limiting column cooperate to complete limiting and fixing of the extrusion base and the threaded base while the fixing plate and the support plate provide extrusion force.

Description

Technical Field

[0001] This invention relates to the field of steel truss welding equipment, specifically to a fixing frame for steel truss welding and its welding method. Background Technology

[0002] A steel truss is a truss structure made of steel, assembled by welding or bolting. When welding and installing a steel truss, the supporting columns that make up the truss need to be placed before the truss is welded to the supporting columns. During the welding process, the supporting columns need to be welded separately. When the supporting rods on the side wall of the truss are not parallel, it will affect the welding accuracy and structural stability.

[0003] According to a patent document with publication number CN222679866U, a steel truss welding device includes a support frame; a first threaded rod is rotatably connected inside the support frame; a first sliding seat is slidably connected inside the support frame; the first sliding seat is threadedly connected to the first threaded rod; a second threaded rod is rotatably connected inside the first sliding seat; the threads on the surface of the second threaded rod are symmetrically arranged along the center line of the second threaded rod; two second sliding seats are threadedly connected to the second threaded rod, and the two second sliding seats are symmetrically arranged along the center line of the second threaded rod. In use, this technical solution, by setting an adjustable first sliding seat inside the support frame and an adjustable second sliding seat inside the first sliding seat, and then fixing a support column placed on top of the second sliding seat with a first fixing plate, and simultaneously fixing the truss placed on top of the fixing seat with a second fixing plate, achieves a structural design that makes truss welding more convenient. However, while this solution facilitates fixing and welding, it cannot quickly change the clamping position during welding and cannot achieve multi-point clamping and fixing, resulting in inconvenience in use. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a fixing frame for welding steel trusses and its welding method, thereby solving the problems mentioned in the background section. The present invention features a novel structure. During use, the movement of the fixing plate and support plate achieves the compression and limiting of the steel frame. Subsequently, driven by a drive motor, the compression seat and threaded seat compress the fixing plate and support plate. Under compression, the fixing plate and support plate clamp and limit the steel frame. While providing compression force, the fixing plate and support plate, along with the cooperation of the limiting holes and limiting posts, complete the limiting and fixing of the compression seat and threaded seat.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fixing frame for welding steel trusses, comprising a fixing base, a rotating base movably mounted on the top of the fixing base, a limiting base movably mounted on the rotating base, a limiting groove formed on the limiting base, a fixing component fixedly mounted on the rotating base, a lifting mechanism and a positioning component respectively mounted on the fixing component, a fixing block fixed at one end of each of the lifting mechanism and the positioning component, a support frame welded to one side of the fixing block, a fixing plate and a support plate movably mounted inside the support frame, the support plate movably mounted at the bottom of the fixing plate, and a steel frame movably mounted between the fixing plate and the support plate.

[0006] Furthermore, one end of the steel frame is movably installed inside the limiting groove, reinforcing rods are welded between the steel frames, a motor base is fixed to the side of the support frame, and a drive motor is fixedly installed on both the motor base and the support frame.

[0007] Furthermore, a support assembly is mounted on the drive motor. The support assembly is movably mounted inside the support frame. The support assembly includes a threaded column, on which a threaded seat and a pressing seat are movably mounted respectively.

[0008] Furthermore, the threaded seat is movably mounted on the side of the fixed plate, the extrusion seat is movably mounted on the side of the support plate, and limit posts are fixed on the sides of both the extrusion seat and the threaded seat. Limit holes are opened on the sides of both the fixed plate and the support plate, and one end of the limit post is movably mounted inside the limit hole.

[0009] Furthermore, a sliding groove is formed on the inner wall of the support frame, and a support mechanism is fixedly installed inside the sliding groove. A slider is fixed to one end of the support mechanism, and one end of the slider is fixed to both the fixed plate and the support plate.

[0010] Furthermore, the fixed base has an internal cavity, and a servo motor is fixedly installed inside the cavity. The servo motor is mounted inside the cavity via a motor bracket, and the servo motor is mounted on the bottom of the rotating base via an output shaft.

[0011] Furthermore, the fixed seat has a fixing hole on its side, and a DC motor is fixedly installed inside the rotating seat. The DC motor is mounted on the limiting seat via a rotating shaft. The fixing assembly includes a movable seat, and a threaded rod is fixed to the bottom of the movable seat. The rotating seat has a threaded hole, and the threaded rod is rotatably installed inside the threaded hole.

[0012] Furthermore, a support column is welded to the top of the movable seat, and a fixing ring is welded to the side of the support column. The support column is rotatably installed inside the lifting mechanism and positioning assembly through the fixing ring.

[0013] Furthermore, the positioning component includes a positioning tube, on which a positioning column is movably mounted. One end of the positioning column is installed inside the positioning tube via a reset mechanism, and a movable column is telescopically mounted on the lifting mechanism.

[0014] A method for welding a steel truss according to the apparatus of claim 1 specifically includes the following steps: Step 1: Material and equipment preparation. The welding materials for the steel truss components must match the base material. Equipment debugging requires checking the accuracy of current and voltage regulation and ensuring reliable grounding. Step 2: Steel component pretreatment, surface rust removal and oil cleaning, ensuring that there are no visible oxide scale, rust and oil stains on the steel surface. Welding should be completed within 4 hours after rust removal. The connection surfaces of the node plate and the rod should be wiped with acetone or alcohol to remove oil stains or dust. Step 3: Assembly and positioning, build a rigid jig, first position the supporting components on the side of the truss chord, place the chord on the jig positioning block, and fix it with a fixing bracket; Step 4: Layered welding, overall sequence: weld the butt joints of the chord members first, then weld the fillet welds of the web members and the node plates, weld the lower chord members first, then the upper chord members, and weld the tension zone welds first, then the compression zone welds. Avoid concentrated welding that may cause local overheating and deformation. Step 5: Post-weld treatment. Use an angle grinder and wire brush to clean the weld and component surface of the weld slag, spatter, and oxide scale. Then wipe the surface oil with acetone and apply anti-rust coating according to the design requirements.

[0015] The beneficial effects of this invention are: 1. In use, the steel frame is compressed and limited by the movement of the fixed plate and the support plate. Later, under the drive of the drive motor, the compression seat and the threaded seat compress the fixed plate and the support plate. Under compression, the fixed plate and the support plate clamp and limit the steel frame. While the fixed plate and the support plate provide the extrusion force, the limiting hole and the limiting post cooperate to limit and fix the compression seat and the threaded seat.

[0016] 2. In this invention, the movable seat rotates later, causing one end of the steel frame to be installed inside the limiting groove. The rotation of the movable seat completes the limiting and fixing of the bottom position of the steel frame. Later, the rotating seat drives the support frame to rotate as a whole. While the support frame rotates as a whole, it moves up and down. The rotation of the support frame changes the position of the welding point. The up and down movement of the support frame realizes the layer-by-layer welding of the steel frame.

[0017] 3. In this invention, the lifting mechanism provides assistance for the vertical movement of the support frame, and the positioning component allows the support frame to move horizontally up and down. Later, the lifting mechanism and the positioning component can be quickly disassembled through the fixing component. After the lifting mechanism and the positioning component are disassembled, individual equipment can be disassembled and replaced. In addition, after the lifting mechanism and the positioning component are removed, they can be hoisted and dismantled outward along with the support frame and the steel frame. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the steps of a steel truss welding method according to the present invention; Figure 2 This is a schematic diagram of the structure of a fixing frame for welding steel trusses according to the present invention; Figure 3 This is a schematic diagram of the support frame for a steel truss welding fixing frame according to the present invention; Figure 4 This is a schematic diagram of the structure of the fixing seat of the fixing frame for welding steel trusses according to the present invention; Figure 5 This is a schematic diagram of the support assembly of a fixing frame for welding steel trusses according to the present invention; Figure 6 This is a schematic diagram of the limiting hole of a fixing frame for welding steel trusses according to the present invention; Figure 7 This is a top view of the steel frame of the fixing frame for welding steel trusses according to the present invention after installation; Figure 8 This is a schematic diagram of the positioning assembly of a fixing frame for welding steel trusses according to the present invention; Figure 9 This is a schematic diagram of the fixing component of a fixing frame for welding steel trusses according to the present invention.

[0019] In the diagram: 1. Fixed seat; 2. Rotating seat; 3. Limiting seat; 4. Limiting groove; 5. Fixing hole; 6. Fixing component; 7. Lifting mechanism; 8. Positioning component; 9. Fixing block; 10. Support frame; 11. Fixing plate; 12. Support plate; 13. Steel frame; 14. Reinforcing rod; 15. Motor seat; 16. Drive motor; 17. Support component; 18. Cavity; 19. Servo motor; 20. Motor frame; 21. Threaded hole; 22. Threaded column; 23. Threaded seat; 24. Extrusion seat; 25. Limiting column; 26. Slide groove; 27. Support mechanism; 28. Slider; 29. ​​Limiting hole; 30. Movable column; 31. Positioning tube; 32. Positioning column; 33. Reset mechanism; 34. Movable seat; 35. Threaded rod; 36. Support column; 37. Fixing ring. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Please see Figures 1 to 9 This invention provides a technical solution: a fixing frame for welding steel trusses, including a fixing base 1, a rotating base 2 movably mounted on the top of the fixing base 1, a limiting base 3 movably mounted on the rotating base 2, a limiting groove 4 on the limiting base 3, a fixing component 6 fixedly mounted on the rotating base 2, a lifting mechanism 7 and a positioning component 8 respectively mounted on the fixing component 6, a fixing block 9 fixed at one end of both the lifting mechanism 7 and the positioning component 8, a support frame 10 welded to one side of the fixing block 9, a fixing plate 11 and a support plate 12 movably mounted inside the support frame 10, the support plate 12 movably mounted at the bottom of the fixing plate 11, a steel frame 13 movably mounted between the fixing plate 11 and the support plate 12, the lifting mechanism 7 being a linear reciprocating electric push rod, the electric push rod being connected to an external telescopic switch via an electric wire, the telescopic switch controlling the telescopic movement of the lifting mechanism 7, the lifting mechanism 7 and the positioning component 8 being alternately installed, the positioning component 8 providing auxiliary support and limiting for the support frame 10.

[0022] In this embodiment, one end of the steel frame 13 is movably installed inside the limiting groove 4. Reinforcing rods 14 are welded between the steel frames 13. A motor base 15 is fixed to the side of the support frame 10. Drive motors 16 are fixedly installed on both the motor base 15 and the support frame 10. A support assembly 17 is installed on the drive motor 16. The support assembly 17 is movably installed inside the support frame 10. The support assembly 17 includes a threaded post 22, on which a threaded seat 23 and a pressing seat 24 are movably installed respectively. The threaded seat 23 is movably mounted on the side of the fixed plate 11, and the extrusion seat 24 is movably mounted on the side of the support plate 12. Limiting posts 25 are fixed on the sides of both the extrusion seat 24 and the threaded seat 23. Limiting holes 29 are opened on the sides of both the fixed plate 11 and the support plate 12. One end of the limiting post 25 is movably mounted inside the limiting hole 29. The threaded post 22 is provided with bidirectional threads. When the threaded post 22 rotates, the extrusion seat 24 and the threaded seat 23 move inward and outward simultaneously. The extrusion seat 24 and the threaded seat 23 move and adjust synchronously with the fixed plate 11 or the support plate 12.

[0023] In this embodiment, a sliding groove 26 is formed on the inner wall of the support frame 10. A support mechanism 27 is fixedly installed inside the sliding groove 26. A slider 28 is fixed to one end of the support mechanism 27. One end of the slider 28 is fixed to the fixing plate 11 and the support plate 12 respectively. A cavity 18 is formed inside the fixing seat 1. A servo motor 19 is fixedly installed inside the cavity 18. The servo motor 19 is installed inside the cavity 18 through a motor frame 20. The servo motor 19 is installed at the bottom of the rotating seat 2 through an output shaft. The fixed seat 1 has a fixing hole 5 on its side. The rotating seat 2 has a DC motor fixedly installed inside. The DC motor is mounted on the limiting seat 3 through a rotating shaft. The fixing component 6 includes a movable seat 34. The bottom of the movable seat 34 is fixed with a threaded rod 35. The rotating seat 2 has a threaded hole 21. The threaded rod 35 is rotatably installed inside the threaded hole 21. The support mechanism 27 is a support spring. When the support spring is compressed, it generates a rebound force, which drives the fixed plate 11 or the support plate 12 to move to both sides, thus completing the front-end positioning and fixing of the steel frame 13.

[0024] In this embodiment, a support column 36 is welded to the top of the movable seat 34, and a fixing ring 37 is welded to the side of the support column 36. The support column 36 is rotatably mounted inside the lifting mechanism 7 and the positioning assembly 8 via the fixing ring 37. The positioning assembly 8 includes a positioning tube 31, on which a positioning column 32 is movably mounted. One end of the positioning column 32 is mounted inside the positioning tube 31 via a reset mechanism 33. A movable column 30 is telescopically mounted on the lifting mechanism 7. The reset mechanism 33 is a reset spring. After the reset spring is released from compression, the positioning column 32 moves as the support frame 10 rises. The positioning column 32 and the positioning tube 31 cooperate to achieve multi-point limiting and support of the support frame 10.

[0025] A method for welding a steel truss using the aforementioned device specifically includes the following steps: Step 1: Material and equipment preparation. The welding materials for the steel truss components must match the base material. Equipment debugging requires checking the accuracy of current and voltage regulation and ensuring reliable grounding. Step 2: Steel component pretreatment, surface rust removal and oil cleaning, ensuring that there are no visible oxide scale, rust and oil stains on the steel surface. Welding should be completed within 4 hours after rust removal. The connection surfaces of the node plate and the rod should be wiped with acetone or alcohol to remove oil stains or dust. Step 3: Assembly and positioning, build a rigid jig, first position the supporting components on the side of the truss chord, place the chord on the jig positioning block, and fix it with a fixing bracket; Step 4: Layered welding, overall sequence: weld the butt joints of the chord members first, then weld the fillet welds of the web members and the node plates, weld the lower chord members first, then the upper chord members, and weld the tension zone welds first, then the compression zone welds. Avoid concentrated welding that may cause local overheating and deformation. Step 5: Post-weld treatment. Use an angle grinder and wire brush to clean the weld and component surface of the weld slag, spatter, and oxide scale. Then wipe the surface oil with acetone and apply anti-rust coating according to the design requirements.

[0026] Working Principle: In use, the steel frame 13 of the steel truss is first installed at the corner of the support frame 10, so that the steel frame 13 is installed between the fixed plate 11 and the support plate 12. The support mechanism 27 pushes the slider 28 to move outward, thereby pushing the fixed plate 11 and the support plate 12 to initially clamp and limit the steel frame 13. Then, the drive motor 16 is started, driving the threaded column 22 to rotate, so that the pressing seat 24 and the threaded seat 23 move outward simultaneously. During this process, the limiting hole 29 and the limiting column 25 cooperate to ensure that the threaded seat 23 and the pressing seat 24 move smoothly in the horizontal direction, thereby completing the compression of the fixed plate 11 and the support plate 12 and realizing the secondary fixation of the steel frame 13.

[0027] One end of the steel frame 13 can be installed inside the limiting groove 4. The limiting seat 3 is rotated by a DC motor, so that the limiting groove 4 moves to the bottom of the steel frame 13; the limiting seat 3 is rotated again, and the inner wall of the limiting groove 4 is used to push the steel frame 13 to make a fine adjustment of its position, thus completing the bottom limiting of the steel frame 13 and effectively preventing the steel frame 13 from tilting inside the support frame 10.

[0028] During welding, the reinforcing rod 14 is welded to the top steel frame 13 first. As the reinforcing rod 14 is welded from top to bottom, the support frame 10 moves downwards gradually under the drive of the lifting mechanism 7, completing the continuous limiting and fixing of the steel frame 13, thus facilitating the welding of the reinforcing rod 14 to the steel frame 13 from top to bottom. In addition, the servo motor 19 is started to drive the lifting mechanism 7 and the positioning component 8 to rotate as a whole, thereby causing the support frame 10 to drive the steel frame to rotate, flexibly changing the welding position, and realizing efficient welding of the steel frame 13 at different positions without changing the worker's standing position.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fixing frame for welding steel trusses, characterized in that: Includes a fixed base (1), a rotating base (2) is movably mounted on the top of the fixed base (1), a limiting base (3) is movably mounted on the rotating base (2), a limiting groove (4) is opened on the limiting base (3), a fixing component (6) is fixedly mounted on the rotating base (2), a lifting mechanism (7) and a positioning component (8) are respectively mounted on the fixing component (6), a fixing block (9) is fixed at one end of the lifting mechanism (7) and the positioning component (8), a support frame (10) is welded to one side of the fixing block (9), a fixing plate (11) and a support plate (12) are movably mounted inside the support frame (10), the support plate (12) is movably mounted at the bottom of the fixing plate (11), and a steel frame (13) is movably mounted between the fixing plate (11) and the support plate (12). One end of the steel frame (13) is movably installed inside the limiting groove (4). A reinforcing rod (14) is welded between the steel frames (13). A motor seat (15) is fixed on the side of the support frame (10). A drive motor (16) is fixedly installed on both the motor seat (15) and the support frame (10). A support assembly (17) is mounted on the drive motor (16). The support assembly (17) is movably mounted inside the support frame (10). The support assembly (17) includes a threaded post (22). A threaded seat (23) and a pressing seat (24) are movably mounted on the threaded post (22). The threaded seat (23) is movably installed on the side of the fixed plate (11), the extrusion seat (24) is movably installed on the side of the support plate (12), and the sides of the extrusion seat (24) and the threaded seat (23) are fixed with limit posts (25). The sides of the fixed plate (11) and the support plate (12) are opened with limit holes (29), and one end of the limit post (25) is movably installed inside the limit hole (29). The inner wall of the support frame (10) has a sliding groove (26), and a support mechanism (27) is fixedly installed inside the sliding groove (26). A slider (28) is fixed at one end of the support mechanism (27), and one end of the slider (28) is fixed on the fixing plate (11) and the support plate (12) respectively.

2. The fixing frame for welding steel trusses according to claim 1, characterized in that: The fixed base (1) has a cavity (18) inside, and a servo motor (19) is fixedly installed inside the cavity (18). The servo motor (19) is installed inside the cavity (18) through a motor frame (20), and the servo motor (19) is installed at the bottom of the rotating base (2) through an output shaft.

3. The fixing frame for welding steel trusses according to claim 1, characterized in that: The fixed seat (1) has a fixed hole (5) on its side. A DC motor is fixedly installed inside the rotating seat (2). The DC motor is mounted on the limiting seat (3) through a rotating shaft. The fixed component (6) includes a movable seat (34). A threaded rod (35) is fixed at the bottom of the movable seat (34). A threaded hole (21) is opened on the rotating seat (2). The threaded rod (35) is rotatably installed inside the threaded hole (21).

4. The fixing frame for welding steel trusses according to claim 3, characterized in that: The top of the movable seat (34) is welded with a support column (36), and a fixing ring (37) is welded to the side of the support column (36). The support column (36) is rotatably installed inside the lifting mechanism (7) and the positioning assembly (8) through the fixing ring (37).

5. A fixing frame for welding steel trusses according to claim 1, characterized in that: The positioning component (8) includes a positioning tube (31), on which a positioning column (32) is movably mounted. One end of the positioning column (32) is installed inside the positioning tube (31) through a reset mechanism (33). A movable column (30) is telescopically mounted on the lifting mechanism (7).

6. A method for welding steel trusses, using the steel truss welding fixture as described in claim 1, characterized in that: Specifically, the following steps are included: Step 1: Material and equipment preparation. The welding materials for the steel truss components must match the base material. Equipment debugging requires checking the accuracy of current and voltage regulation and ensuring reliable grounding. Step 2: Steel component pretreatment, surface rust removal and oil cleaning, ensuring that there are no visible oxide scale, rust and oil stains on the steel surface. Welding should be completed within 4 hours after rust removal. The connection surfaces of the node plate and the rod should be wiped with acetone or alcohol to remove oil stains or dust. Step 3: Assembly and positioning, build a rigid jig, first position the supporting components on the side of the truss chord, place the chord on the jig positioning block, and fix it with a fixing bracket; Step 4: Layered welding, overall sequence: weld the butt joints of the chord members first, then weld the fillet welds of the web members and the node plates, and weld in the order from top to bottom. Weld the upper chord members first, then the lower chord members, and weld the tension zone welds first, then the compression zone welds to avoid concentrated welding that could cause local overheating and deformation. Step 5: Post-weld treatment. Use an angle grinder and wire brush to clean the weld and component surface of the weld slag, spatter, and oxide scale. Then wipe the surface oil with acetone and apply anti-rust coating according to the design requirements.

Images