A common box bus three support hole rotary welding tool and a method for using the same

Abstract

The present application relates to bus production assembly auxiliary equipment technical field, disclose a kind of co-box bus three support plug hole rotary welding tool and its using method, including rack, the rack is slidably connected with sliding disc, the upper portion of the sliding disc is fixedly connected with transition plate, the upper portion of the transition plate is fixedly connected with roller bracket assembly, the rotary support of roller bracket assembly is rotationally supported with rotation plate assembly, one end of the rack is provided with opening, the sliding disc is slidably inserted into the inside of the rack from the opening, the roller bracket assembly is fixedly connected with the transition plate by bolt, the transition plate is fixedly connected with the sliding disc by bolt.The present application is slidably arranged in the inside of rack by sliding disc, and the roller bracket assembly is connected on the sliding disc by using transition plate, so that the tool can be flexibly adjusted support spacing according to actual working condition, so as to perfectly adapt to the assembly and welding requirement of conductor and three support of different length specifications.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for busbar production and assembly, specifically to a rotary welding fixture for plugging holes in a common busbar and its application method. Background Technology

[0002] During the production and assembly of the common busbar, the internal conductors need to be inserted into the holes in the middle of the three supports for positioning. Then, the conductors are welded to the three supports at the plug holes of the three-support inserts to ensure a strong connection. However, existing welding auxiliary equipment has many limitations in actual operation.

[0003] Because the conductors and three pillars involved in production vary in length and specifications, existing support fixtures often employ fixed support structures. The support spacing cannot be flexibly adjusted according to working conditions, making it difficult to meet the requirements for stable placement and assembly of workpieces of different lengths. Furthermore, the pre-assembled conductors and three pillars are quite heavy, and the existing fixtures lack a reasonable concentric positioning and low-friction rotation mechanism. This results in significant frictional resistance for operators when adjusting the workpiece's orientation, leading to high labor intensity and making the workpiece prone to shifting or wobbling during rotation.

[0004] More notably, the multiple plug holes on the three-pillar insert are distributed circumferentially. Because the workpiece is difficult to rotate and adjust easily and precisely on the tooling, some plug holes are often located to the side or bottom during actual welding. When faced with these non-flat welding positions, welders are forced to adopt challenging side or even overhead welding postures. This not only demands high operational skills and results in low welding efficiency, but also, due to gravity, makes it difficult for the weld flux to fill evenly, making it hard to guarantee weld strength. Furthermore, the limited welding angle easily leads to uneven heat distribution or weld spatter, causing irreversible thermal damage to the fragile inserts inside the three-pillar insert, directly reducing the overall pass rate and operational reliability of the busbar product.

[0005] Therefore, there is an urgent need for a special tooling that can adapt to workpieces of various specifications, support labor-saving rotation, and improve welding posture to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a rotary welding fixture for plugging holes in a common busbar and its application method. This solves the problems of existing fixtures being unable to flexibly adjust the support spacing to adapt to workpieces of different lengths and specifications, and the lack of a labor-saving rotation mechanism making it difficult to adjust the plug holes on the three pillars to the optimal downward welding position, which in turn leads to high welding difficulty, difficulty in guaranteeing welding quality, and easy damage to the three pillar inserts.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The first aspect of the present invention provides a rotary welding fixture for plugging holes in a common busbar, comprising a frame, a slide plate slidably connected inside the frame, a transition plate fixedly connected above the slide plate, a roller bracket assembly fixedly connected above the transition plate, and a rotating plate assembly rotatably supported on the roller bracket assembly.

[0009] Preferably, one end of the frame is provided with an opening, and the slide is slidably inserted into the frame through the opening.

[0010] Preferably, the roller bracket is fixedly connected to the transition plate by bolts.

[0011] Preferably, the transition plate and the slide are fixedly connected by bolts.

[0012] Preferably, the roller bracket assembly includes a bracket body and rollers rotatably connected to the bracket body, and the rotating plate is mounted on the rollers.

[0013] Preferably, the number of the slide plate, the transition plate, the roller bracket assembly, and the rotating plate assembly are all at least two sets.

[0014] Preferably, the three through holes are evenly distributed in a ring around the center of the turntable body.

[0015] Preferably, the frame is provided with a straight slide rail adapted to the slide plate.

[0016] A second aspect of the present invention provides a method for using a rotary welding fixture for plugging holes in a common busbar, comprising the following steps:

[0017] The roller bracket is connected to the transition plate with assembly bolts, and the transition plate is connected to the slide with bolts.

[0018] The assembled assembly is slid into the frame from one side of the frame opening;

[0019] Insert the three conductors into the central hole of the three pillars;

[0020] The rotating plate is assembled onto both sides of the conductor, so that the position of the rotating plate is consistent with the position of the roller on the roller bracket.

[0021] The conductor with the three supports inserted is hoisted and placed on the common busbar three-support plugging rotary welding fixture, and the rotating plate is placed on the roller bracket assembly;

[0022] Rotate the rotating plate assembly so that the plug welding holes on the three pillars are directly above;

[0023] Use a welding machine to weld at the location of the plug hole.

[0024] This invention provides a rotary welding fixture for plugging holes in a common busbar and its method of use. It has the following beneficial effects:

[0025] 1. This invention provides a linearly sliding slide inside the frame and uses a transition plate to elevate and connect the roller bracket to the slide. This allows the tooling to flexibly adjust the support spacing according to the actual working conditions, thereby perfectly adapting to the assembly and welding needs of conductors and three pillars of different lengths.

[0026] 2. This invention establishes a coaxial rotation center by using a rotating plate assembly connected and fixed to both sides of the conductor, and placing it on a roller bracket assembly. With the low-friction rolling support of the roller bracket assembly, the operator can easily rotate the rotating plate assembly and the three through-beams smoothly 360 degrees, reducing the operator's workload.

[0027] 3. This invention, through rotational adjustment, enables each of the dispersed plug welding holes on the three pillars to be precisely rotated to the optimal downward welding position directly above, overcoming the high welding difficulty caused by the dispersed hole positions. This not only ensures the efficiency and firmness of the welding between the three pillars and the conductor, but also fundamentally avoids thermal damage or destruction to the three pillar inserts during the welding process, thereby improving the product qualification rate and reliability. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present invention;

[0029] Figure 2 This is a schematic diagram of the roller bracket assembly structure of the present invention.

[0030] The components include: 1. Turning plate assembly; 2. Roller bracket assembly; 3. Slide plate; 4. Transition plate; 5. Frame. Detailed Implementation

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

[0032] Example:

[0033] Please see the appendix Figure 1 -Appendix Figure 2This invention provides a rotary welding fixture for plugging holes in a common busbar, comprising a frame 5 integrally welded from profiles, serving as the basic framework of the entire welding fixture and providing robust and reliable support. A sliding plate 3 is slidably connected within the frame 5. The linear movement of the sliding plate 3 within the frame 5 allows for flexible adjustment of the support spacing, accommodating welding of conductors and three-posts of different lengths. A transition plate 4 is fixedly connected above the sliding plate 3. The transition plate 4 not only serves as a connection but also elevates the upper support components, preventing collisions and interference with the outer edge of the frame 5 during sliding or operation. A roller bracket assembly 2 is fixedly connected above the transition plate 4, providing a stable mounting platform for the core rotating components. The rotating support has a rotating plate assembly 1, which can drive the internally clamped conductor to rotate freely 360 degrees, thereby ensuring that each plug hole can be accurately adjusted to the top during welding, reducing the difficulty of operation and improving the reliability of welding. One end of the frame 5 is provided with an opening, which provides a convenient access channel for the assembly of the internal sliding components. The slide plate 3 slides into the frame 5 through the opening, allowing the operator to quickly push the support block into the frame 5, simplifying the on-site assembly steps. The roller bracket assembly 2 and the transition plate 4 are fixedly connected by bolts, ensuring the tightness of the connection and facilitating the disassembly and maintenance of components when needed later. The transition plate 4 and the slide plate 3 are fixedly connected by bolts, so that these three parts form a high-strength integrated mobile base.

[0034] The roller support assembly 2 includes a support body and rollers rotatably connected to the support body. The rolling design of the rollers reduces the rotational friction resistance when placing heavy busbar conductors. The rotating plate assembly 1 is placed on the rollers, and the outer edge of the rotating plate assembly 1 disc is in close contact with the roller surface, ensuring stability during rotation and preventing the workpiece from shaking during welding. The number of sliding plate 3, transition plate 4, roller support assembly 2 and rotating plate assembly 1 are all at least two sets. Usually, two sets are used as a group to support the left and right ends of the conductor respectively, ensuring the horizontal force and overall stability of the long strip conductor and the three pillars in the suspended state.

[0035] Three through holes are evenly distributed in a ring around the center of the turntable body. The through holes are designed specifically for the precise insertion of three conductors, which not only ensures the relative position of the three pillars on the conductors, but also ensures that the rotation center of the entire fixture is completely aligned with the center of the conductors, playing a crucial role in center positioning. The frame 5 is equipped with a linear slide that matches the slide 3. This linear slide provides accurate limit guidance for the movement of the slide 3, avoiding deviation or jamming during the sliding adjustment process, and ensuring the efficiency and accuracy of the fixture spacing adjustment.

[0036] Specifically, by setting a slide plate 3 inside the frame 5 that can slide smoothly in a straight line along the slide rail, and by structurally raising the roller bracket assembly 2 and firmly connecting it to the slide plate 3 through the transition plate 4, this design avoids interference between the rotating parts and the outer edge of the frame 5. This allows for flexible and quick adjustment of the lateral spacing between multiple sets of support components to adapt to the welding needs of conductors and three pillars of various lengths in the factory, greatly improving the versatility of the tooling platform.

[0037] During operation, the three conductors are first accurately inserted into the middle hole of the three pillars to complete the pre-assembly positioning. The evenly distributed through holes on the rotating plate assembly 1 are then used to connect and fix the three conductors on both sides, thereby establishing the absolute rotation center of the entire assembly and ensuring concentricity and force balance during subsequent rotation.

[0038] Subsequently, using cranes or other lifting equipment, the rotating plate assembly 1 with conductors is smoothly placed on the roller bracket assembly 2. With the help of the low-resistance rolling support of the roller bracket assembly 2, the operator can easily drive the rotating plate assembly 1 to rotate smoothly and without jamming 360 degrees without expending a lot of physical strength, thereby driving the three pillars on the conductor to rotate synchronously.

[0039] This allows each plug hole on the three pillars, originally distributed in different spatial orientations, to be rotated sequentially and precisely to the top position (i.e., the optimal overhead welding position). This overcomes the problems of high welding difficulty and excessively high technical requirements for welders caused by the dispersed plug hole positions and numerous dead angles in overhead and side welding in traditional operations. This welding posture, where the plug holes are always facing upwards, not only facilitates the uniform filling of high-temperature welding liquid under the action of gravity, ensuring that plug welding can be completed in one go at the optimal angle, resulting in high efficiency and a robust structure, but also avoids heat concentration or splashing caused by improper welding angles. This fundamentally prevents the risk of damaging the fragile inserts inside the three pillars, comprehensively ensuring the final quality and finished product qualification rate of the common busbar assembly.

[0040] Another embodiment of the present invention provides a method for using a rotary welding fixture for plugging holes in a common busbar, comprising the following steps:

[0041] Connect the roller bracket assembly 2 to the transition plate 4 with bolts, and connect the transition plate 4 to the slide 3 with bolts. During assembly, ensure that the bolts are fully tightened to ensure that the entire movable support block has sufficient structural strength and stability when bearing heavy workpieces. The operator needs to first check the contact surfaces of the roller bracket assembly 2, the transition plate 4, and the slide 3, and wipe the dust off the contact surfaces with a dry cotton cloth to prevent debris from getting stuck between the contact surfaces and causing assembly gaps. Prepare hexagonal head bolts, flat washers, and spring washers. Place the transition plate 4 on top of the slide 3, align the bolt holes at the four corners, and pass the bolts through the spring washers and flat washers in sequence, and then insert them into the bolt holes. Tighten the bolts into the threaded holes by hand for three to four turns to ensure that there is no resistance. Use a torque wrench to pre-tighten in a diagonal cross sequence, and then tighten them finally in the same cross sequence.

[0042] The torque value is set according to the parameters given in the drawing. After tightening the transition plate 4 and the slide plate 3, place the roller bracket assembly 2 on top of the transition plate 4. Clean the contact surface and align the mounting holes in the same way. Insert the bolts equipped with washers. In the same way, pre-tighten and finally tighten them in two steps in a diagonal cross sequence. After all the bolts are tightened, the operator uses a marker to draw a straight line on the bolt head and the surface of the connected parts. In this way, the bolts can be judged to be loose by observing whether the marking line is misaligned during subsequent equipment operation.

[0043] The connected assembly is slid into the frame 5 from one side of the opening. In practice, two sets of this assembly are usually slid in. The lateral spacing between the two sets of supports is flexibly adjusted along the straight slide inside the frame 5 according to the length of the conductor to be welded. Before sliding the assembly in, the operator uses a long-handled brush to clean metal debris and impurities from the straight slide inside the frame 5, and then wipes the slide surface with a dry cloth. If the slide surface is relatively dry, a small amount of machine oil is dripped onto the slide surface using an oil can, and then spread evenly with a cloth. Two operators stand on either side of the opening of the frame 5, lift the first set of connected assemblies, and align the front end of the slide plate 3 with the slide groove at the opening of the frame 5. Keeping the assembly horizontal, it is slowly pushed into the frame 5.

[0044] When pushing, the force should be even to avoid the assembly tilting and getting stuck in the slide. Push the first set of assemblies into the middle and rear position of the frame 5, then lift the second set of assemblies and push it into the frame 5 from the opening in the same way. Then, the operator should refer to the drawings of the current production batch to obtain the specific length and support point position dimensions of the conductor to be welded.

[0045] Starting from the center point of the first set of ligands, use a steel tape measure to measure and stretch the steel tape measure to the support span dimension specified in the drawing. At this dimension, the operator makes a positioning mark on the edge of frame 5 with a stone pencil.

[0046] Push the second set of ligands so that the center point of the second set of ligands is aligned with this positioning mark. After the spacing adjustment is completed, the operator uses a steel tape measure to re-measure the distance between the center points of the two sets of ligands to confirm that the dimensions are consistent with the drawing requirements.

[0047] Insert the three conductors into the central hole of the three pillars. By pre-inserting and adjusting the pre-assembly dimensions, the relative positions of the three pillars on the longer conductor are precisely ensured and fixed. The operator places the three conductors on the preparation rack and uses a non-woven cloth soaked in alcohol to wipe the area where the three conductors need to be inserted into the three pillars in turn to remove surface oxides and oil stains. Check whether there are burrs or injection molding residues inside the three holes in the middle of the three pillars. If so, clean them with a scraper. The operator holds the first three pillar in his hand, aligns it with the ends of the three conductors, and slowly pushes it into the conductor.

[0048] When the first three-post is pushed to near the designated position marked on the drawing, stop pushing, take the second three-post, and insert the three conductors in the same way. The operator uses a steel ruler or tape measure to measure the length of the conductors extending beyond the three-post, as well as the distance between the two three-posts.

[0049] Based on the measurement data, hold the edges of the three pillars with both hands and gently tap and slide them back and forth on the conductor until all dimensions perfectly match the dimensions given in the assembly drawings.

[0050] At the junction of the conductor and the three pillars after the position has been adjusted, a positioning line is drawn with a marker. In order to prevent the three pillars from shifting during the subsequent hoisting process, the operators use paper tape to wrap two to three times around the conductor on both sides of the three pillars to form a temporary retaining ring.

[0051] Install the rotating plate assembly 1 onto both sides of the conductor, aligning its position with the rollers on the roller bracket assembly 2. This operation integrates the three independent conductors into a concentrically stressed unit, ensuring that the rotation center remains centered on the three conductors throughout, thus playing a crucial role in centering. The operator holds the first rotating plate assembly 1 to the first end of the conductor, observes the positions of the three through holes on the assembly, and aligns them with the spatial arrangement of the ends of the three conductors. Then, insert the rotating plate assembly 1 onto the three conductors. Push the rotating plate assembly 1 inward until its inner surface reaches the installation depth specified in the drawing. Use an Allen wrench to tighten the locking screws on the side of the rotating plate assembly 1.

[0052] When tightening the set screws, the set screws of the three conductors need to be tightened alternately to ensure that the clamping force on the three conductors is consistent. Then, the operator moves to the other end of the conductor and takes the second rotating plate assembly 1. The second rotating plate assembly 1 is then inserted into the three conductors and pushed to the specified depth using the same method. Before tightening the set screws of the second rotating plate assembly 1, the operator needs to stand to the side of the conductor, with their line of sight parallel to the two rotating plate assemblies 1, and observe the flatness of the outer cylindrical surfaces of the two rotating plate assemblies 1.

[0053] Adjust the angle of the second rotating plate assembly 1 so that its outer edge is on the same horizontal line as the outer edge of the first rotating plate assembly 1, without any twisting or misalignment. After confirming alignment, alternately tighten the locking screws on the second rotating plate assembly 1. After installation, the operator uses a long ruler to check the coaxiality of the two rotating plate assemblies 1 by placing them against their outer edges.

[0054] The conductor with the three supports in place is hoisted onto the rotating welding fixture for the three supports of the common busbar. The rotating plate assembly 1 is placed on the roller bracket assembly 2. During hoisting, an overhead crane is generally used for smooth lifting. After lowering, the outer edge of the disc of the rotating plate assembly 1 is fully in contact with the surface of the roller, and the roller bears the entire weight. The operator selects two nylon hoisting straps with the required load-bearing capacity, passes the nylon hoisting straps under the conductors on the outside of the two three supports respectively, and ties them in a bottom-hugging manner. The position of the two hoisting straps is adjusted so that they are close to the rotating plate assembly 1, but do not press down on the rotating plate assembly 1.

[0055] Hang the upper end of the lifting sling on the hook of the overhead crane. The operator presses the lifting button on the overhead crane remote control to tighten the lifting sling, but before the workpiece leaves the ground, check whether the lifting sling is knotted or twisted. Confirm that the lifting point is symmetrical on both sides of the center of gravity of the entire workpiece. After confirming that everything is correct, continue to press the lifting button to slowly lift the workpiece about 20 centimeters off the ground.

[0056] Observe whether the workpiece remains horizontal. If one end is higher than the other, lower the workpiece and readjust the position of the lifting strap. Once the workpiece is horizontal, move the overhead crane directly above the welding fixture. The operator stands on either side of the fixture, holding the workpiece at both ends to prevent it from swinging in the air. Press the descent button on the overhead crane remote control to slowly lower the workpiece.

[0057] Align the outer edge of the disc of the guide plate assembly 1 with the roller groove on the roller bracket assembly 2. When the guide plate assembly 1 is only two to three centimeters away from the roller, use a jogging descent method until the outer edge of the guide plate assembly 1 is in complete contact with the roller surface and the lifting belt becomes slack.

[0058] The operator unties the lifting straps from the hook and moves the overhead crane away. The operator crouches down, keeping their line of sight level with the rollers, and checks whether the disc of the rotating plate assembly 1 is properly seated between the two rollers, confirming that there is no misalignment or one side is suspended in the air;

[0059] Rotate the rotating plate assembly 1 so that the plug welding holes on the three pillars are directly above. With the help of the low resistance of the rollers, the operator can easily rotate the rotating plate assembly 1, thereby driving the internally clamped conductor and the three pillars to rotate synchronously 360 degrees. This precisely adjusts the plug welding holes, which were originally located on the side or bottom, to the optimal downward welding position. The operator stands on the side of the fixture, holding the outer edge of the rotating plate assembly 1 or the end of the conductor with both hands. With the support of the rollers, the operator applies a pushing force to make the entire workpiece rotate. During the rotation, the operator's line of sight is focused on the first three pillar insert area that needs to be welded, observing the changes in the position of the plug welding holes on the three pillars.

[0060] As one of the plug weld holes gradually rises to the top area with rotation, the operator reduces the pushing force with both hands, slowing down the rotation speed of the workpiece. The operator takes a horizontal right-angle ruler, places one edge of the ruler against the horizontal reference surface of the three supports, and observes whether the central axis of the plug weld hole is perpendicular to the horizontal plane. By slightly rotating the workpiece in both directions, the angle is continuously adjusted until the opening of the plug weld hole is completely facing upwards and at its highest point.

[0061] Release both hands; the workpiece remains stationary at this angle under its own weight and the friction of the rollers. The operator then moves to the second three-post position to check if its corresponding plug weld hole is also directly above.

[0062] If there is an angular deviation between the plug weld holes of the two three-posts, check whether there was a misalignment in the previous pre-assembly steps and readjust until all the plug weld holes of the three-posts are directly above.

[0063] Use a welding machine to weld at the plug hole position. After completing the welding of the current upward plug hole, repeat the above rotation steps to efficiently complete the welding of all 9 plug holes in one go. This overcomes the welding difficulty of scattered hole positions and ultimately ensures that the three pillars are absolutely firmly welded to the conductor, and that the three pillar inserts will not suffer any heat damage or destruction. The operator clamps the grounding wire clamp of the argon arc welding machine to the frame 5 or the exposed metal part of the conductor to ensure good contact. Open the valve of the welding shielding gas cylinder and adjust the knob of the gas flow meter to set the gas flow rate within the data range required by the process.

[0064] Adjust the welding current and welding voltage on the control panel of the welding machine. The operator puts on a welding protective mask and heat-resistant gloves, picks up the welding torch, and aligns the nozzle of the welding torch with the plug hole directly above. Press the welding torch switch to ignite the electric arc.

[0065] First, spot weld the junction of the conductor and the three-pillar insert to prevent misalignment caused by thermal deformation during welding. Then, fill the plug hole in the order of bottom to outside and center to edge. During welding, maintain a stable moving speed of the welding torch and observe the formation of the molten pool to ensure that the molten metal of the welding wire is completely fused with the conductor on the sidewalls and bottom of the plug hole.

[0066] After completing the welding of a plug hole, release the welding torch switch to terminate the arc, keeping the torch in place for two to three seconds to allow the shielding gas to continue blowing through the molten pool until it cools and solidifies. The operator then uses a wire brush to clean oxides and impurities from the weld surface.

[0067] Inspect the weld surface for defects such as porosity, cracks, or lack of fusion. After confirming that the first hole has been welded, the operator moves to the rotating plate assembly 1 position, holds the assembly with both hands, and rotates the workpiece again using the previous operating method. Rotate the next plug weld hole to be welded to the top position and repeat the above welding operations of arc initiation, filling, arc termination, and cleaning.

[0068] Complete the plug welding of the three holes on the first three-post support, the three holes on the second three-post support, and all the plug welding of the other three-post supports in sequence. After all nine holes are welded, turn off the welding machine power and the protective gas valve.

[0069] After the workpiece has cooled to room temperature, the operators use lifting straps and overhead cranes to lift the welded common busbar assembly from the tooling and place it on the finished product pallet, following the previous lifting procedures.

[0070] Working principle: By setting a linearly sliding slide plate 3 inside the frame 5, and raising and connecting the roller bracket assembly 2 to the slide plate 3 through the transition plate 4, the support spacing can be flexibly adjusted to adapt to the welding requirements of conductors of different lengths and three pillars. During operation, the rotating plate assembly 1 is sleeved and fixed on both sides of the three conductors to establish the rotation center. Then, the rotating plate assembly 1 with conductors is placed on the roller bracket assembly 2. With the rolling support of the roller bracket assembly 2, the operator can easily drive the rotating plate assembly 1 to rotate 360 ​​degrees, thereby driving the three pillars on the conductors to rotate synchronously. This ensures that each plug welding hole on the three pillars can be accurately rotated to the top position, thus overcoming the welding difficulty caused by the dispersed plug welding hole position, ensuring that efficient and firm plug welding can be completed at the optimal angle, while avoiding damage to the three pillar inserts.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary welding fixture for plugging holes in a common busbar, comprising a frame (5), characterized in that, A slide plate (3) is slidably connected inside the frame (5). A transition plate (4) is fixedly connected above the slide plate (3). A roller bracket assembly (2) is fixedly connected above the transition plate (4). A rotating plate assembly (1) is rotatably supported on the roller bracket assembly (2).

2. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The frame (5) has an opening at one end, and the slide (3) is slidably inserted into the frame (5) through the opening.

3. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The roller bracket assembly (2) is fixedly connected to the transition plate (4) by bolts.

4. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The transition plate (4) and the slide (3) are fixedly connected by bolts.

5. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The roller bracket assembly (2) includes a bracket body and a roller rotatably connected to the bracket body, and the rotating plate assembly (1) is placed on the roller.

6. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The number of the slide (3), the transition plate (4), the roller bracket assembly (2) and the rotating plate assembly (1) are all at least two sets.

7. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The rotating plate assembly (1) includes a turntable body, on which three through holes are provided for conductors to pass through.

8. The rotary welding fixture for plugging holes in a common busbar according to claim 7, characterized in that, The three through holes are evenly distributed in a ring around the center of the turntable body.

9. The rotary welding fixture for plugging holes in a common busbar according to claim 1, characterized in that, The frame (5) is provided with a straight slide that is adapted to the slide plate (3).

10. A method for using a rotary welding fixture for plugging holes in a common busbar, characterized in that, The rotary welding fixture for plugging holes in a common busbar as described in any one of claims 1-9 includes the following steps: The roller bracket assembly (2) is connected to the transition plate (4) with bolts, and the transition plate (4) is connected to the slide plate (3) with bolts; The assembled assembly is slid into the frame (5) from the opening side of the frame (5); Insert the three conductors into the central hole of the three pillars; The rotating plate assembly (1) is mounted on both sides of the conductor so that the position of the rotating plate assembly (1) is consistent with the position of the roller on the roller bracket assembly (2); The conductor with the three supports in place is hoisted and placed on the common busbar three-support plugging rotary welding fixture, and the rotating plate assembly (1) is placed on the roller bracket assembly (2); Rotate the rotating plate assembly (1) so that the plug welding holes on the three pillars are directly above; Use a welding machine to weld at the location of the plug hole.

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