Steel plate stress auxiliary positioning device for steel box girder welding

Abstract

The invention discloses a steel plate stress auxiliary positioning device for welding a steel box girder, which belongs to the field of welding devices, and is characterized in that a bracket body is arranged into a U-shaped structural form, so that the two sides of the bottom of the bracket body can firmly clamp the position of a welding seam formed by the contact of a steel plate I and a steel plate II through a group of walking mechanisms; the effect that one walking mechanism drives the support body to move, clamp and weld at the same time is achieved, the phenomenon that gaps are not uniform during welding of the weld joint is reduced, the welding quality of the weld joint is improved, the automation degree is high, the welding process is coherent, and the device is especially suitable for welding of the weld joint of the joint of two long-distance steel plates and has high practicability. A plurality of magnetic type quick-release clamps do not need to be used for conducting multi-point magnetic positioning on a long-distance welding seam, the phenomenon that the multiple magnetic type quick-release clamps need to be taken down one by one in the welding advancing direction, and the welding path is avoided is avoided, and welding convenience and working efficiency are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, and more specifically, to a stress-assisted positioning device for steel plates used in welding steel box girders. Background Technology

[0002] In bridge engineering, rail transit engineering, and large steel structure construction, steel box girders have become one of the core load-bearing components due to their advantages such as high strength, large span, and strong resistance to deformation. During the manufacturing process of steel box girders, the welding and splicing of steel plates is a critical step, and its welding quality directly determines the structural stability, load-bearing capacity, and service life of the steel box girder.

[0003] To compensate for weld seam errors or stress errors at the contact points when two adjacent steel plates are welded at a perpendicular angle, the welding process typically involves first butt-jointing the edges of the two steel plates at a perpendicular angle to form a weld seam. Then, several magnetic quick-release clamps are used to fix and position the weld seam, ensuring a stable connection between the two steel plates and a uniform weld gap. While this welding structure has many advantages, it is inconvenient for welding long distances between two steel plates or long weld seams. Not only are multiple magnetic quick-release clamps needed for fixation, but the clamps must also be continuously removed one by one along the welding torch's forward direction to avoid obstructing the weld seam. Therefore, it is not very convenient for welding long distances between two steel plates or long weld seams. Therefore, we propose a stress-assisted positioning device for steel box girder welding to solve the aforementioned problems. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To compensate for weld seam errors or stress errors at the contact point when two adjacent steel plates are welded at a perpendicular angle, several magnetic quick-release clamps are used to fix and position the weld seam during the welding process, ensuring a stable connection between the two steel plates and maintaining a uniform weld seam gap. However, when welding two steel plates over a long distance or welding a long weld seam, not only are multiple magnetic quick-release clamps required for fixation, but the magnetic quick-release clamps in the direction of the welding torch's advance also need to be removed one by one during the welding process to avoid obstructing the weld seam. Therefore, it is inconvenient to use when welding two steel plates over a long distance or welding a long weld seam.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A stress-assisted positioning device for welding steel box girders includes a support body. The bottom of the support body is provided with a set of walking mechanisms with the same structure but arranged in opposite directions. The two sides of the support body are provided with a set of support mechanisms with the same structure but arranged in opposite directions. The top inside the support body is also provided with a welding mechanism.

[0009] The support body includes a set of horizontal square tube telescopic parts at the top and two sets of vertical square tube telescopic parts on both sides of the bottom. The horizontal square tube telescopic parts and the vertical square tube telescopic parts have the same structure, and the telescopic connection of the horizontal square tube telescopic parts and the vertical square tube telescopic parts is connected by a set of bolts.

[0010] The traveling mechanism includes a set of roller supports fixedly welded to the bottom of a set of longitudinal square tube telescopic parts. The set of roller supports is rotatably connected by six rotating shafts, and contact rollers are fixedly installed on the six rotating shafts located between the set of roller supports. The top ends of the two rotating shafts located at both ends of the roller supports are fixedly installed with sprockets. The two sprockets at corresponding positions are connected by chains. The top ends of the four rotating shafts located in the middle position are also fixedly installed with sprockets. The bottom of the set of longitudinal square tube telescopic parts is also fixedly welded to the other side by a base plate. A traveling drive motor is fixedly installed at the bottom of the base plate, and the drive shaft at the top of the traveling drive motor extends through the top of the base plate. The end of the drive shaft at the top of the traveling drive motor is fixedly installed with sprockets. Sprockets and the four sprockets are connected by chains.

[0011] Furthermore, the support mechanism includes a telescopic rod, the telescopic connection of which is connected by a set of bolts, and a set of clamping plates are fixedly welded to both ends of the telescopic rod. The two ends of the telescopic rod are respectively clamped to one side of the two sets of longitudinal square tube telescopic parts by a set of clamping plates, and the ends of the set of clamping plates are also connected by locking bolts.

[0012] Furthermore, the support mechanism also includes an inclined support arm fixedly welded to one side of the outer wall of the telescopic rod. A mounting plate is fixedly welded to the bottom end of the inclined support arm. Support pulleys are fixedly installed at both ends of the bottom of the mounting plate through pulley seats. The outer edge of the support pulleys is made of rubber. A switch magnet is also fixedly installed at the bottom of the mounting plate located between the two pulley seats.

[0013] Furthermore, the welding mechanism includes a scissor lift, which comprises an upper plate body, a lower plate body, and an adjusting screw. The upper plate body is fixedly welded between a set of transverse square tube telescopic parts. A rotary adjusting motor is fixedly installed at the bottom of the lower plate body via a motor base, and a connector is fixedly installed at the end of the drive shaft at the bottom of the rotary adjusting motor. A welding torch body is rotatably connected to one side of the connector via a pin. Several insertion holes are equidistantly provided on both the connector and the welding torch body at the connection point between them, and corresponding pairs of insertion holes are connected by positioning pins.

[0014] Furthermore, the distance between the bottom surface of the switch magnet and the top surface of the mounting plate is less than the distance between the bottom edge of the support pulley and the top surface of the mounting plate, and the outer wall of the contact roller is fixedly pasted with an anti-slip rubber sleeve.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of this invention are:

[0017] (1) In this scheme, by setting the support body into a U-shaped structure, the bottom sides of the support body can be firmly clamped at the weld position formed by the contact of steel plate one and steel plate two through a set of walking mechanisms. This achieves the effect of the set of walking mechanisms driving the support body to move, clamp, and weld at the same time, reducing the unevenness of the gap when welding at the weld and improving the welding quality at the weld.

[0018] (2) This solution has a high degree of automation and a continuous welding process. It is especially suitable for welding the weld seam at the connection of two steel plates over a long distance. It does not require the use of multiple magnetic quick-release clamps to perform multi-point magnetic positioning of the long weld seam, thus avoiding the need to remove multiple magnetic quick-release clamps one by one in the welding forward direction and avoid the welding path, which greatly improves the convenience and efficiency of welding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the use of the present invention;

[0020] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the disassembled structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the support body structure of the present invention;

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the central region structure;

[0025] Figure 7 This is a schematic diagram of the support mechanism structure of the present invention;

[0026] Figure 8 For the present invention Figure 7 Schematic diagram of the central region structure;

[0027] Figure 9 This is a schematic diagram of the welding mechanism structure of the present invention;

[0028] Figure 10 This is a schematic diagram of the other side of the welding mechanism of the present invention.

[0029] Explanation of the labels in the diagram:

[0030] 1. Support body; 2. Horizontal square tube telescopic part; 3. Longitudinal square tube telescopic part;

[0031] 4. Traveling mechanism; 5. Roller support; 6. Rotating shaft; 7. Contact roller; 8. Sprocket 1; 9. Chain 1; 10. Sprocket 2; 11. Seat plate; 12. Travel drive motor; 13. Sprocket 3; 14. Chain 2;

[0032] 15. Support mechanism; 16. Telescopic rod; 17. Clamping plate; 18. Locking bolt; 19. Diagonal support arm; 20. Mounting plate; 21. Pulley seat; 22. Support pulley; 23. Switch magnet;

[0033] 24. Welding mechanism; 25. Scissor lift; 2501. Upper plate body; 2502. Lower plate body; 2503. Adjusting screw; 26. Motor base; 27. Rotary adjusting motor; 28. Connecting parts; 29. ​​Welding torch body;

[0034] 30. Steel plate one; 31. Steel plate two; 32. Wooden block; 33. Weld seam; 34. Magnetic quick-release clamp. Detailed Implementation

[0035] The technical solutions in 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Please see Figures 1-10A stress-assisted positioning device for welding steel box girders includes a support body 1, a set of walking mechanisms 4 with the same structure but arranged in opposite directions at the bottom of the support body 1, a set of support mechanisms 15 with the same structure but arranged in opposite directions on both sides of the support body 1, and a welding mechanism 24 is also provided at the top inside the support body 1.

[0038] The support body 1 includes a set of transverse square tube telescopic parts 2 located at the top and two sets of longitudinal square tube telescopic parts 3 located on both sides of the bottom. The transverse square tube telescopic parts 2 and the longitudinal square tube telescopic parts 3 have the same structure, and the telescopic connection of the transverse square tube telescopic parts 2 and the longitudinal square tube telescopic parts 3 is connected by a set of bolts.

[0039] The walking mechanism 4 includes a set of roller brackets 5 fixedly welded to the bottom of a set of longitudinal square tube telescopic parts 3. The set of roller brackets 5 are rotatably connected by 6 rotating shafts 6. Contact rollers 7 are fixedly installed on the 6 rotating shafts 6 located between the set of roller brackets 5. The top ends of the two rotating shafts 6 located at both ends of the roller brackets 5 are fixedly installed with sprockets 1-8. The two sprockets 1-8 at corresponding positions are connected by chains 1-9. The top ends of the four rotating shafts 6 located in the middle position are also fixedly installed with sprockets 2-10. The bottom of the set of longitudinal square tube telescopic parts 3 is also fixedly welded to the other side by a seat plate 11. The bottom of the seat plate 11 is fixedly installed with a walking drive motor 12, and the drive shaft at the top of the walking drive motor 12 extends through to the top of the seat plate 11. The top end of the drive shaft at the top of the walking drive motor 12 is fixedly installed with sprockets 3-13. Sprockets 3-13 and the four sprockets 2-10 are connected by chains 2-14.

[0040] The support mechanism 15 includes a telescopic rod 16. The telescopic connection of the telescopic rod 16 is connected by a set of bolts, and a set of clamping plates 17 are fixedly welded to both ends of the telescopic rod 16. The two ends of the telescopic rod 16 are respectively clamped to one side of the two sets of longitudinal square tube telescopic parts 3 by a set of clamping plates 17, and the ends of the set of clamping plates 17 are also connected by locking bolts 18.

[0041] The support mechanism 15 also includes an inclined support arm 19 fixedly welded to one side of the outer wall of the telescopic rod 16. An installation plate 20 is fixedly welded to the bottom end of the inclined support arm 19. Support pulleys 22 are fixedly installed at both ends of the bottom of the installation plate 20 through pulley seats 21. The outer edge of the support pulleys 22 is made of rubber. A switch magnet 23 is also fixedly installed at the bottom of the installation plate 20 located between the two pulley seats 21.

[0042] The welding mechanism 24 includes a scissor lift 25, which includes an upper plate body 2501, a lower plate body 2502, and an adjusting screw 2503. The upper plate body 2501 is fixedly welded between a set of transverse square tube telescopic parts 2. The bottom of the lower plate body 2502 is fixedly mounted with a rotary adjusting motor 27 via a motor base 26. A connector 28 is fixedly mounted at the end of the drive shaft at the bottom of the rotary adjusting motor 27. A welding torch body 29 is rotatably connected to one side of the connector 28 via a pin. Several insertion holes are equally spaced on the connector 28 and the welding torch body 29 at the connection point between the connector 28 and the welding torch body 29. Corresponding two insertion holes are connected by a positioning pin.

[0043] The distance between the bottom surface of the switch magnet 23 and the top surface of the mounting plate 20 is less than the distance between the bottom edge of the support pulley 22 and the top surface of the mounting plate 20. Anti-slip rubber sleeves are fixedly pasted on the outer wall of the contact roller 7.

[0044] The working principle of this type of steel plate stress-assisted positioning device for welding steel box girders is as follows:

[0045] The two steel plates to be welded are labeled as steel plate 1 30 and steel plate 2 31, respectively. Then, three wooden blocks 32 are placed at equal intervals on the welding table, and the length of the three wooden blocks 32 is not less than the length of steel plate 1 30 or steel plate 2 31. Then, steel plate 2 31 is laid flat on the three wooden blocks 32. Then, one edge of steel plate 1 30 is brought into contact with one edge of steel plate 2 31 to form a weld 33. The angle between steel plate 1 30 and steel plate 2 31 of weld 33 is perpendicular. Then, two magnetic quick-release clamps 34 are used to initially fix the connection between steel plate 1 30 and steel plate 2 31 at both ends of steel plate 2 31.

[0046] While adjusting the top surface of the pad 32 located at the bottom of the weld 33 to contact the first steel plate 30 and the second steel plate 31, the side of the pad 32 is on the same plane as the outer side of the first steel plate 30. This ensures that the pad 32 can provide contact support for the first steel plate 30 and the second steel plate 31 at the weld 33, and also ensures that the side of the pad 32 does not hinder the smooth movement of the contact roller 7 when it clamps the outer side of the first steel plate 30 later. At this time, the initial positioning work of the first steel plate 30 and the second steel plate 31 in the initial stage of welding can be completed.

[0047] Then, first adjust the length of a set of transverse square tube telescopic parts 2 of the support body 1 so that the contact rollers 7 of the set of walking mechanisms 4 can be clamped on the outside of the weld 33 (the outside of steel plate 30 at the connection between steel plate 1 30 and steel plate 2 31) and the other side of the edge of steel plate 2 31 (such as...). Figure 1 and Figure 2(As shown), then adjust the length of the two sets of longitudinal square tube telescopic parts 3 of the support body 1 so that the height of the set of transverse square tube telescopic parts 2 after adjustment is greater than the width of the steel plate 30, to avoid contact interference between the set of transverse square tube telescopic parts 2 and the top edge of the vertically erected steel plate 30. Then adjust the length of the telescopic rod 16 of the support mechanism 15 so that the two sets of clamping plates 17 at both ends of the telescopic rod 16 can be smoothly clamped on one side of the two sets of longitudinal square tube telescopic parts 3, forming a pull between the two sets of longitudinal square tube telescopic parts 3, increasing the clamping force at the contact part of the contact roller 7. Finally, install the locking bolt 18 and tighten it. During the installation of the telescopic tie rod 16 of the support mechanism 15, it is necessary not only to ensure that the bottom of the telescopic tie rod 16 does not contact or interfere with the top edge of the vertically erected steel plate 30, but also to ensure that the support pulley 22 at the bottom of the support mechanism 15 contacts the top surface of the steel plate 31. This allows the support pulley 22 at the bottom of the support mechanism 15 to slide smoothly on the steel plate 31, while the support pulley 22 can also support the bracket body 1 through the inclined support arm 19 and the telescopic tie rod 16, thereby improving the stability of the bracket body 1 during subsequent movement. At this point, the installation process of the bracket body 1 and the support mechanism 15 can be completed.

[0048] Then, by adjusting the screw at the end of the screw 2503, the lower plate 2502 of the scissor lift 25 can be raised and lowered on the upper plate 2501 (the specific structure and principle of the scissor lift are known and publicly available technologies, so they will not be described in detail here). This will drive the rotary adjustment motor 27, the connector 28, and the welding torch body 29 to rise and fall at the bottom of the upper plate 2501 until the welding head at the bottom of the welding torch body 29 can touch the weld seam 33. Then, remove the positioning pin and adjust the clamp angle at the connection between the connector 28 and the welding torch body 29 until the welding head at the bottom of the welding torch body 29 can contact the weld seam 33 without causing interference. At this point, the positioning pin can be reinserted to complete the process of adjusting the position and angle of the welding torch body 29.

[0049] Finally, welding work can be performed on weld 33. First, the device is moved to the top of one of the magnetic quick-release clamps 34, so that the welding head at the bottom of the welding gun body 29 starts welding from one side of the magnetic quick-release clamp 34, and this side is between the two magnetic quick-release clamps 34. This allows the welding gun body 29 to weld all the weld 33 between the two magnetic quick-release clamps 34. Then, the handle on the switch magnet 23 is used to open the switch magnet 23 on the two support mechanisms 15, so that the bottom of the switch magnet 23 is switched to a strong magnetic state (the specific structure and use principle of the switch magnet are known and publicly available technology, so they will not be described in detail here). This will not interfere with the movement and support of the auxiliary inclined arm 19 of the support pulley 22 on the steel plate 21, and the strong magnet generated at the bottom of the switch magnet 23 will firmly magnetically attract and press the mounting plate 20 onto the steel plate 21, improving the stability of the support structure of the two support mechanisms 15 when the bracket body 1 moves later.

[0050] During the welding process, the traveling mechanism 4 provides driving force for the forward movement of the support body 1, which also provides driving force for the welding torch body 29 to advance and weld along the weld seam 33. Specifically, the traveling drive motors 12 of a set of traveling mechanisms 4 start simultaneously, driving the sprocket 13 to rotate. Then, through the connection of the chain 14, the four sprockets 10 rotate in the same direction. Then, through the connection of the rotating shafts 6 on the four sprockets 10, the four contact rollers 7 located in the middle position rotate in the same direction. During the rotation of the sprockets 10, due to the two rollers located at both ends... Sprocket 2 10 is coaxially mounted with sprocket 1 8 at the adjacent position, and the two sprockets 1 8 at the corresponding positions are connected by chain 1 9. Therefore, during the rotation of sprocket 2 10, it can drive the sprockets 1 8 at both ends of the roller bracket 5 to rotate in the same direction. Finally, when sprocket 3 13 rotates, it drives the four sprockets 2 10 and the four sprockets 1 8 to rotate in the same direction through the connection of chain 2 14 and the two chains 1 9. This causes the contact rollers 7 on a set of walking mechanisms 4 to rotate in one forward direction, providing driving force for the bracket body 1 to move along the direction of weld 33.

[0051] Finally, after all the welds 33 located between the two magnetic quick-release clamps 34 have been welded, remove the device and the two magnetic quick-release clamps 34, and then manually weld the clamped positions of the two magnetic quick-release clamps 34. This greatly improves the automation and continuity of the welding process and reduces the probability of worker intervention during the welding process.

[0052] Example 2:

[0053] In view of the above embodiment 1, further description is provided, see reference. Figure 1 and Figure 3A set of walking mechanism 4 is set at the bottom of the two sets of longitudinal square tube telescopic parts 3. Its purpose is to provide driving force for the movement of the support body 1, and at the same time, to facilitate the transmission of the clamping force of the two sets of longitudinal square tube telescopic parts 3 to the contact roller 7 of the set of walking mechanism 4. The contact roller 7 firmly clamps the two sides of the steel plate 2 31, so that the bottom edge of the steel plate 1 30 can be firmly attached to one side edge of the steel plate 2 31, ensuring that the gap of the weld 33 is always consistent and improving the welding quality at the weld.

[0054] The sprocket 13 at the top of the walking drive motor 12 drives four sprockets 10 and four sprockets 8 through chain 14 and chain 9. This transmission connection not only enables the four sprockets 10 and four sprockets 8 to rotate in the same direction, and the contact rollers 7 on the same walking mechanism 4 to rotate in the same direction, but also avoids interference between the installation path of the chain and the bottom of the longitudinal square tube telescopic part 3.

[0055] The support mechanism 15 includes a telescopic pull rod 16 which pulls between the two sets of longitudinal square tube telescopic parts 3, improving the contact and clamping stability of the contact roller 7. The switch magnet 23 firmly magnetically attracts and presses the inclined support arm 19 onto the top of the steel plate 2 31, and does not hinder the bottom of the inclined support arm 19 from moving smoothly on the top surface of the steel plate 2 31 with the support of the support pulley 22.

[0056] By designing the switch magnet 23 so that the distance between its bottom surface and the top surface of the mounting plate 20 is less than the distance between the bottom edge of the support pulley 22 and the top surface of the mounting plate 20, the bottom surface of the switch magnet 23 can be kept in contact with the top surface of the steel plate 21 when the bottom of the support pulley 22 is in contact with the top surface of the steel plate 21. This ensures that the bottom surface of the switch magnet 23 is always suspended above the top surface of the steel plate 21, thus avoiding interference with the movement of the bottom of the inclined support arm 19.

[0057] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A stress-assisted positioning device for steel plate welding of steel box girders, comprising a support body (1), characterized in that: The bottom of the support body (1) is provided with a set of walking mechanisms (4) with the same structure and opposite to each other. The sides of the support body (1) are provided with a set of support mechanisms (15) with the same structure and opposite to each other. The top of the inside of the support body (1) is also provided with a welding mechanism (24). The support body (1) includes a set of transverse square tube telescopic parts (2) located at the top and two sets of longitudinal square tube telescopic parts (3) located on both sides of the bottom. The transverse square tube telescopic parts (2) and the longitudinal square tube telescopic parts (3) have the same structure, and the telescopic connection of the transverse square tube telescopic parts (2) and the longitudinal square tube telescopic parts (3) is connected by a set of bolts. The walking mechanism (4) includes a set of roller supports (5) fixedly welded to the bottom of a set of longitudinal square tube telescopic parts (3). The set of roller supports (5) are rotatably connected by 6 rotating shafts (6). Contact rollers (7) are fixedly installed on each of the 6 rotating shafts (6) located between the set of roller supports (5). Sprockets (8) are fixedly installed on the top ends of the two rotating shafts (6) located at both ends of the roller supports (5). The two sprockets (8) at corresponding positions are connected by chains (9). The top ends of the four rotating shafts (6) are also fixedly installed with sprockets two (10). The bottom of the set of longitudinal square tube telescopic parts (3) is also fixedly welded to the other side by a seat plate (11). The bottom of the seat plate (11) is fixedly installed with a walking drive motor (12), and the drive shaft at the top of the walking drive motor (12) extends through to the top of the seat plate (11). The end of the drive shaft at the top of the walking drive motor (12) is fixedly installed with sprocket three (13). The sprocket three (13) and the four sprockets two (10) are connected by a chain two (14).

2. The stress-assisted positioning device for steel plate welding of steel box girders according to claim 1, characterized in that: The support mechanism (15) includes a telescopic rod (16). The telescopic connection of the telescopic rod (16) is connected by a set of bolts. Both ends of the telescopic rod (16) are fixedly welded with a set of clamping plates (17). Both ends of the telescopic rod (16) are respectively clamped to one side of the two sets of longitudinal square tube telescopic parts (3) by a set of clamping plates (17). The ends of the set of clamping plates (17) are also connected by locking bolts (18).

3. The stress-assisted positioning device for steel plate welding of steel box girders according to claim 2, characterized in that: The support mechanism (15) also includes an inclined support arm (19) fixedly welded to one side of the outer wall of the telescopic rod (16). The bottom end of the inclined support arm (19) is fixedly welded to a mounting plate (20). Both ends of the bottom of the mounting plate (20) are fixedly mounted with support pulleys (22) through pulley seats (21). The outer edge of the support pulleys (22) is made of rubber. A switch magnet (23) is also fixedly mounted at the bottom of the mounting plate (20) located between the two pulley seats (21).

4. The stress-assisted positioning device for steel plate welding of steel box girders according to claim 1, characterized in that: The welding mechanism (24) includes a scissor lift (25), which includes an upper plate body (2501), a lower plate body (2502), and an adjusting screw (2503). The upper plate body (2501) is fixedly welded between a set of transverse square tube telescopic parts (2). The bottom of the lower plate body (2502) is fixedly mounted with a rotary adjusting motor (27) via a motor base (26). A connector (28) is fixedly mounted at the end of the drive shaft at the bottom of the rotary adjusting motor (27). A welding torch body (29) is rotatably connected to one side of the connector (28) via a pin. Both the connector (28) and the welding torch body (29) at the connection point of the connector (28) and the welding torch body (29) are provided with several equidistant holes. Corresponding two holes are connected by a positioning pin.

5. The stress-assisted positioning device for steel plate welding of steel box girders according to claim 3, characterized in that: The distance between the bottom surface of the switch magnet (23) and the top surface of the mounting plate (20) is less than the distance between the bottom edge of the support pulley (22) and the top surface of the mounting plate (20). The outer wall of the contact roller (7) is fixedly pasted with anti-slip rubber sleeves.

Images