A welding assembly tooling for a standard section assembly of a tower crane

Abstract

This utility model discloses a welding assembly fixture for a standard section assembly of a tower crane, specifically relating to the field of tower crane manufacturing technology. It includes a base, a main chord angle steel member on the top of the base, a support plate fixedly mounted on the top of the base, a node plate on the top of the support plate, and a positioning mechanism on one side of the support plate. The positioning mechanism includes a fixing block fixedly mounted on one side of the support plate, and support frames fixedly mounted on both sides of the fixing block. A small stepper motor is fixedly mounted on the top of one support frame, and a rotating shaft is fixedly mounted on the output end of the small stepper motor. The other support frame is rotatably connected to one end of the rotating shaft, and multiple positioning plates are fixedly mounted on the outside of the rotating shaft. This utility model ensures precise installation of the node plate and enhances stability. The insertion of the positioning pins into the fixing holes restricts the displacement of the node plate, providing a stable foundation for welding. It is flexible in operation and has versatility.

Description

Technical Field

[0001] This utility model relates to the field of tower crane manufacturing technology, and more specifically, to a welding assembly tooling for a tower crane standard section assembly. Background Technology

[0002] Tower cranes are commonly used lifting equipment on construction sites. They complete the lifting and transportation of various materials by continuously extending standard sections. As a key component of tower cranes, the standard section plays a vital role in the stability, safety, and working efficiency of the crane. At present, large tower cranes mostly use plate-type standard sections. Due to their large cross-section, plate-type standard sections can be disassembled and stacked, which is convenient for transportation and storage. The connection between standard sections is made of fishplates and horizontal and vertical pins, which has high positioning accuracy.

[0003] Existing technology requires expensive, high-precision drilling equipment and employs a "welding-drilling-welding" process, which is highly unreasonable. It requires two welding operations, increases the number of steps, wastes time during process changeover, and consequently reduces production efficiency.

[0004] A search revealed that Chinese patent CN210413245U discloses a welding and positioning fixture for standard sections of a tower crane. This mechanism replaces the existing "welding-hole-welding" process with a "hole-welding" process, concentrating two welding steps to simplify the production flow and improve efficiency. Through structures such as positioning columns, baffles, positioning blocks, and fixing columns, it accurately places main chord angle steel, fishplates, node plates, and diagonal web members according to the pin holes of the components, ensuring accurate relative positions of each component. Furthermore, the top plane or arc surface of the support column is adaptable to components of different shapes; for example, the arc surface stably supports cylindrical diagonal web members. The shape of the support plate matches the node plate, enhancing positioning stability. Secondly, the pin holes verify the positioning accuracy of the main chord angle steel, ensuring the overall structural precision of the standard section without requiring high-precision hole-making equipment.

[0005] However, in actual use, this structure mainly relies on pin holes and pins for positioning. This method can ensure the accuracy of positioning to a certain extent, but the pin holes and pins will wear out during long-term use, which will lead to a decrease in positioning accuracy and affect the welding quality of the plate standard section. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a welding assembly tooling for a tower crane panel standard section assembly to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A welding assembly tooling for a standard section assembly of a tower crane includes a base, a main chord angle steel is provided on the top of the base, a support plate is fixedly provided on the top of the base, a node plate is provided on the top of the support plate, and a positioning mechanism is provided on one side of the support plate.

[0009] The positioning mechanism includes a fixed block fixedly disposed on one side of a support plate, and support frames fixedly disposed on both sides of the fixed block. A small stepper motor is fixedly mounted on the top of one of the support frames, and a rotating shaft is fixedly disposed on the output end of the small stepper motor. The other support frame is rotatably connected to one end of the rotating shaft. Multiple positioning plates are fixedly disposed on the outside of the rotating shaft. A threaded rod is threadedly connected to the inside of the positioning plate, and a positioning post is fixedly disposed on one end of the threaded rod.

[0010] Multiple positioning plates are arranged on both sides of the fixing block, and a limit block is fixedly arranged at the other end of the threaded rod. Multiple fixing holes are opened on the surface of the node plate, and the positioning pin is inserted into the fixing hole.

[0011] By adopting the above technical solution: a small stepper motor drives the rotating shaft and the positioning plate to adjust the angle, and in conjunction with the threaded rod and the positioning post, the positioning post is accurately inserted into the fixing hole, ensuring the precise installation of the node plate and enhancing stability. The insertion of the positioning post and the fixing hole restricts the displacement of the node plate, providing a stable foundation for welding. The operation is flexible and versatile.

[0012] As a further description of the above technical solution: the top of the base is equipped with multiple fixing brackets by screws, and an auxiliary mechanism is provided on one side of the fixing bracket. The auxiliary mechanism includes a small stepper motor II fixedly installed on one side of the fixing bracket. A rotating rod is fixedly installed at the output end of the small stepper motor II. A pressure plate is fixedly installed on the outside of the rotating rod. An L-shaped fixing block is rotatably installed at one end of the rotating rod. One side of the L-shaped fixing block is fixedly connected to the surface of the fixing bracket.

[0013] The surface of the pressure plate is fixedly provided with multiple fixing grooves, and a T-shaped fixing strip is inserted into the inside of the fixing groove. A rubber pressure plate is fixedly provided on one side of the T-shaped fixing strip.

[0014] By adopting the above technical solution, the position of the pressure plate can be flexibly adjusted to meet the needs of different welding pairs. It also facilitates the installation and replacement of the rubber pressure plate, improves maintenance efficiency, reduces shaking and displacement during the welding process, and ensures welding quality.

[0015] As a further description of the above technical solution: a plurality of limiting frames are fixedly provided on the surface of the pressure plate, and a U-shaped plug is inserted into the inside of the limiting frame, and the U-shaped plug is connected to the limiting frame by bolts;

[0016] The base has multiple arc-shaped support blocks fixedly installed on its top, and a diagonal brace is snapped onto the top of each arc-shaped support block. Multiple positioning blocks are fixedly installed on one side of the base, and a hydraulic tensioning shaft is fixedly installed on the top of the base.

[0017] By adopting the above technical solution, the limiting frame and U-shaped insert on the pressure plate are connected by bolts, which can further fix the T-shaped fixing strip and rubber pressure plate, prevent displacement under welding vibration, improve the fixing effect on the workpiece, ensure welding accuracy, and, combined with the positioning block for positioning the overall welded parts, provide a precise initial position for welding, reduce installation deviation, reduce the risk of welding deformation, and improve the welding quality and overall performance of the standard section of the tower crane.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] 1. By setting up a positioning mechanism, compared with the existing technology, the small stepper motor drives the rotating shaft to rotate, which can flexibly adjust the angle of the positioning plate. With the help of the movable threaded rod and positioning column, the positioning column can be accurately inserted into the fixing hole of the node plate, realizing the precise installation of the node plate on the support plate, improving the accuracy of welding assembly, ensuring the dimensional accuracy of the standard section, and the insertion and cooperation between the positioning column and the fixing hole effectively limits the displacement and shaking of the node plate during the welding process, providing a stable foundation for welding, reducing welding deformation, improving welding quality and the overall stability of the standard section. Furthermore, by adjusting the threaded rod, it can adapt to the fixing requirements of node plates of different specifications, increasing the versatility and applicability of the tooling.

[0020] 2. By setting up an auxiliary mechanism, compared with the existing technology, the small stepper motor drives the rotating rod to rotate, which in turn causes the pressure plate to rotate. The position of the pressure plate can be flexibly adjusted to adapt to different welding requirements. The T-shaped fixing strip and the fixing groove are connected to each other, which facilitates the installation and replacement of the rubber pressure plate. The rubber pressure plate can increase the friction with the workpiece and reduce displacement during welding. Moreover, the limit frame and the U-shaped plug are connected by bolts, which can further limit the T-shaped fixing strip to prevent it from loosening during operation and improve the stability of the fixation. The hydraulic tensioning shaft can tighten the workpiece, further ensuring the relative position stability of each component during welding, improving welding accuracy and ensuring product quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a side view of the positioning machine of this utility model.

[0023] Figure 3 This is a top view of the positioning mechanism of this utility model.

[0024] Figure 4This is a schematic diagram of the auxiliary mechanism structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the disassembly structure of the auxiliary mechanism of this utility model.

[0026] Figure 6 This is a schematic diagram of the overall rear-view three-dimensional structure of this utility model.

[0027] The attached diagram is labeled as follows: 1. Base; 2. Main chord angle steel; 3. Support plate; 4. Node plate; 5. Fixing block; 6. Support frame; 7. Small stepper motor one; 8. Rotating shaft; 9. Positioning plate; 10. Threaded rod; 11. Positioning column; 12. Limiting block; 13. Fixing hole; 14. Fixing frame; 15. Small stepper motor two; 16. Rotating rod; 17. Pressure plate; 18. L-shaped fixing block; 19. Fixing groove; 20. T-shaped fixing strip; 21. Rubber pressure plate; 22. Limiting frame; 23. U-shaped insert; 24. Arc-shaped support block; 25. Diagonal web bar; 26. Positioning stop; 27. Hydraulic tensioning shaft. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] like Figure 1-6 As shown, this embodiment provides a welding assembly tooling for a tower crane panel standard section assembly, including a base 1, a main chord angle steel 2 on the top of the base 1, a support plate 3 fixedly installed on the top of the base 1, a node plate 4 on the top of the support plate 3, and a positioning mechanism on one side of the support plate 3.

[0031] The positioning mechanism includes a fixed block 5 fixedly installed on one side of the support plate 3, and a support frame 6 fixedly installed on both sides of the fixed block 5. A small stepper motor 7 is fixedly installed on the top of one of the support frames 6, and a rotating shaft 8 is fixedly installed at the output end of the small stepper motor 7. The other support frame 6 is rotatably connected to one end of the rotating shaft 8. Multiple positioning plates 9 are fixedly installed on the outside of the rotating shaft 8. A threaded rod 10 is threadedly connected inside the positioning plate 9. A positioning post 11 is fixedly installed at one end of the threaded rod 10. Multiple positioning plates 9 are installed on both sides of the fixed block 5. A limit block 12 is fixedly installed at the other end of the threaded rod 10. Multiple fixing holes 13 are opened on the surface of the node plate 4, and the positioning post 11 is inserted into the fixing holes 13.

[0032] Multiple mounting brackets 14 are installed on the top of the base 1 by screws. An auxiliary mechanism is provided on one side of the mounting bracket 14. The auxiliary mechanism includes a small stepper motor 15 fixedly installed on one side of the mounting bracket 14. A rotating rod 16 is fixedly installed at the output end of the small stepper motor 15. A pressure plate 17 is fixedly installed on the outside of the rotating rod 16. An L-shaped fixing block 18 is rotatably installed at one end of the rotating rod 16. One side of the L-shaped fixing block 18 is fixedly connected to the surface of the mounting bracket 14.

[0033] Multiple arc-shaped support blocks 24 are fixedly installed on the top of the base 1. An inclined web rod 25 is snapped onto the top of the arc-shaped support block 24. Multiple positioning blocks 26 are fixedly installed on one side of the base 1. A hydraulic tensioning shaft 27 is fixedly installed on the top of the base 1.

[0034] As can be seen, in the above technical solution, the main chord angle steel 2 is placed on top of the base 1 and supported by the base 1. The support plate 3 is installed on the base 1, and then the node plate 4 is placed on top of the support plate 3. The diagonal web bar 25 is initially positioned on the arc-shaped support block 24. The positioning block 26 positions the whole. Then, the small stepper motor 7 is started to drive the rotating shaft 8 and the positioning plate 9 to rotate. After adjusting the angle, the threaded rod 10 is rotated so that the positioning pin 11 is inserted into the fixing hole 13 of the node plate 4.

[0035] Then, start the small stepper motor 15 to drive the rotating rod 16 and the pressure plate 17 to rotate, so that the rubber pressure plate 21 presses the inclined web rod 25. Then, start the hydraulic tensioning shaft 27 to tension the pin hole of the main chord angle steel 2 to stabilize the position of the component. Then, welding is carried out to complete the welding of the plate standard section assembly.

[0036] Usage process: Place the main chord angle steel 2 to be welded on top of the base 1. At this time, the main chord angle steel 2 relies on the base 1 to provide stable support. Fix the support plate 3 on top of the base 1, and then place the node plate 4 on top of the support plate 3.

[0037] Next, the diagonal web member 25 is placed on the arc-shaped support block 24 at the top of the base 1. The arc-shaped support block 24 provides initial positioning and support for the diagonal web member 25. The positioning block 26 on one side of the base 1 provides overall positioning for the entire sheet standard section assembly to be welded, ensuring its accurate position during the welding process and preparing for subsequent welding positioning.

[0038] Then start the small stepper motor 7. The output of the small stepper motor 7 drives the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, the multiple positioning plates 9 fixed on its outside rotate accordingly. According to the position requirements of the fixing hole 13 on the node plate 4, adjust the angle of the positioning plate 9. After the angle of the positioning plate 9 is adjusted, rotate the threaded rod 10. Since the threaded rod 10 is threadedly connected to the positioning plate 9, the threaded rod 10 will move along the threaded hole of the positioning plate 9.

[0039] The positioning pin 11 at one end of the threaded rod 10 moves with the movement of the threaded rod 10 until the positioning pin 11 is inserted into the corresponding fixing hole 13 on the surface of the node plate 4, thereby achieving precise positioning of the node plate 4 on the support plate 3.

[0040] Then start the small stepper motor 15 on one side of the fixed frame 14. The output end of the small stepper motor 15 drives the rotating rod 16 to rotate. When the rotating rod 16 rotates, the pressure plate 17 fixed to its outside rotates accordingly. When the pressure plate 17 drives the rubber pressure plate 21 to rotate to the appropriate position, the rubber pressure plate 21 can press and fix the inclined web rod 25, thus completing the positioning of the inclined web rod 25 in the tooling.

[0041] Then, the hydraulic tensioning shaft 27 is activated. The hydraulic tensioning shaft 27 extends or retracts to tighten the pin holes on the surface of the main chord angle steel 2, further ensuring the relative position stability of each component during welding and improving welding accuracy. After completing the above positioning and fixing operations, welding equipment can be used to weld the main chord angle steel 2, node plate 4, and diagonal web member 25, etc., until the welding of the tower crane plate standard section assembly is completed.

[0042] Example 2

[0043] like Figure 4-6 As shown, this embodiment provides a system including a pressure plate 17 with multiple fixing grooves 19 fixedly disposed on its surface. T-shaped fixing strips 20 are inserted into the fixing grooves 19, and a rubber pressure plate 21 is fixedly disposed on one side of each T-shaped fixing strip 20. Multiple limiting frames 22 are fixedly disposed on the surface of the pressure plate 17, and U-shaped inserts 23 are inserted into the limiting frames 22. The U-shaped inserts 23 are connected to the limiting frames 22 by bolts.

[0044] As can be seen, in the above technical solution, unscrew the connecting bolt between the U-shaped insert 23 and the limiting frame 22, pull the U-shaped insert 23 outward to make it exit from the limiting frame 22, release the additional limitation on the T-shaped fixing strip 20, apply appropriate force to pull it out from the fixing groove 19 on the surface of the pressure plate 17, so that the rubber pressure plate 21 is separated from the pressure plate 17, and finally, replace it with a new rubber pressure plate 21.

[0045] Usage process: When the rubber pressure plate 21 needs to be replaced due to long-term friction, unscrew the bolt connecting the U-shaped insert 23 and the limiting frame 22, and then pull it outward to make the U-shaped insert 23 exit from the limiting frame 22, so that it no longer additionally limits the T-shaped fixing strip 20. Then, hold the T-shaped fixing strip 20 and pull it directly out of the fixing groove 19 on the surface of the pressure plate 17. Since the T-shaped fixing strip 20 and the fixing groove 19 are plugged in, it can be removed with appropriate force. In this way, the rubber pressure plate 21 is separated from the pressure plate 17. Then, reinstall and fix it in the reverse order.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding assembly tooling for a standard section assembly of a tower crane, comprising a base (1), characterized in that: The base (1) is provided with a main chord angle steel (2) at the top, a support plate (3) is fixedly provided at the top of the base (1), a node plate (4) is provided at the top of the support plate (3), and a positioning mechanism is provided on one side of the support plate (3). The positioning mechanism includes a fixed block (5) fixedly disposed on one side of the support plate (3), and a support frame (6) fixedly disposed on both sides of the fixed block (5). A small stepper motor (7) is fixedly installed on the top of one of the support frames (6), and a rotating shaft (8) is fixedly disposed on the output end of the small stepper motor (7). Another support frame (6) is rotatably connected to one end of the rotating shaft (8). Multiple positioning plates (9) are fixedly provided on the outside of the rotating shaft (8). A threaded rod (10) is threadedly connected inside the positioning plate (9). A positioning post (11) is fixedly provided at one end of the threaded rod (10).

2. The welding assembly tooling for the standard section assembly of a tower crane according to claim 1, characterized in that: Multiple positioning plates (9) are arranged on both sides of the fixing block (5), and a limit block (12) is fixedly arranged at the other end of the threaded rod (10). Multiple fixing holes (13) are opened on the surface of the node plate (4), and the positioning column (11) is inserted into the fixing hole (13).

3. The welding assembly tooling for the standard section assembly of a tower crane according to claim 1, characterized in that: The top of the base (1) is fitted with multiple fixing brackets (14) by screws. An auxiliary mechanism is provided on one side of the fixing bracket (14). The auxiliary mechanism includes a small stepper motor (15) fixedly installed on one side of the fixing bracket (14). A rotating rod (16) is fixedly installed at the output end of the small stepper motor (15). A pressure plate (17) is fixedly installed on the outside of the rotating rod (16). An L-shaped fixing block (18) is rotatably installed at one end of the rotating rod (16). One side of the L-shaped fixing block (18) is fixedly connected to the surface of the fixing bracket (14).

4. The welding assembly tooling for the standard section assembly of a tower crane according to claim 3, characterized in that: The surface of the pressure plate (17) is fixedly provided with a plurality of fixing grooves (19), and a T-shaped fixing strip (20) is inserted into the inside of the fixing groove (19). A rubber pressure plate (21) is fixedly provided on one side of the T-shaped fixing strip (20).

5. The welding assembly tooling for the standard section assembly of a tower crane according to claim 3, characterized in that: Multiple limiting frames (22) are fixedly provided on the surface of the pressure plate (17). A U-shaped plug (23) is inserted into the inside of the limiting frame (22). The U-shaped plug (23) is connected to the limiting frame (22) by bolts.

6. The welding assembly tooling for the standard section assembly of a tower crane according to claim 1, characterized in that: The top of the base (1) is fixedly provided with a plurality of arc-shaped support blocks (24), and the top of the arc-shaped support blocks (24) is snapped with a diagonal brace (25).

7. The welding assembly tooling for the standard section assembly of a tower crane according to claim 1, characterized in that: A plurality of positioning blocks (26) are fixedly provided on one side of the base (1), and a hydraulic tensioning shaft (27) is fixedly provided on the top of the base (1).

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