A transformer oil tank welding device

Abstract

The present application relates to the field of welding device, specifically is a kind of transformer oil tank welding device, including welding robot, and two positioners installed on welding robot, welding robot is also provided with two respectively corresponding alignment mechanism with positioner, alignment mechanism is used to replace spot welding and directly fixed fin plate on oil tank frame, welding robot is also provided with unloading mechanism, fin plate is placed on the oil tank frame, the present application adopts unloading mechanism, and automatically adjusts the position of hoisting fin plate and accurately places in the predetermined assembly of oil tank frame, subsequently, by rolling assembly, the fin plate that has been placed in position is pressed and limited fixed on oil tank frame, the temporary fixing link of manual spot welding in traditional process is saved, not only significantly shorten the welding manufacturing cycle of single oil tank, but also avoid the continuous damage of base metal caused by manual spot welding, effectively improve the internal density of full penetration weld and appearance forming quality.

Description

Technical Field

[0001] This invention relates to the field of welding equipment, specifically a transformer oil tank welding device. Background Technology

[0002] The oil tank of an oil-immersed power transformer typically consists of a tank frame and corrugated fins (heat dissipation fins) welded to the outside of the frame. The quality of the weld between the heat dissipation fins and the tank frame directly affects the overall sealing performance and heat dissipation efficiency of the tank, and is one of the key factors to ensure the safe and stable operation of the transformer.

[0003] In current transformer tank manufacturing processes, a combination of manual spot welding positioning and robotic full welding is commonly used. The specific operation process is as follows: First, operators use hoisting equipment to lift the transformer tank frame to the welding positioner station and perform preliminary fixation. Then, hoisting equipment is used again to lift and place the heat dissipation fins one by one at their predetermined assembly positions on the outside of the tank frame. Next, operators use welding torches to perform local spot welding on the corners or points where each fin contacts the frame, using the weld points to temporarily fix the fins to the frame, thus completing the pre-welding positioning. Finally, the welding robot is started and performs continuous full welding on all the connection welds that have been spot welded and positioned according to the pre-set program trajectory.

[0004] However, the traditional "manual spot welding combined with robot full welding" process has revealed the following significant drawbacks in actual production: First, it has low production efficiency and long manufacturing cycle. The spot welding positioning process relies on manual operation and needs to be carried out separately before the full welding process. The two processes are implemented in separate steps, which leads to a longer manufacturing cycle for a single fuel tank. Under the task of mass production, manual spot welding has become a bottleneck link that restricts the overall production capacity and cannot meet the ever-increasing delivery demand.

[0005] Secondly, the welding quality is unstable. On the one hand, manual spot welding is highly subjective and random, and it is difficult to make the position, quantity and quality of spot welding precise and uniform, which can easily cause uneven stress distribution. On the other hand, during full welding, the spot welding position will be remelted twice. The two thermal cycles will cause local grain coarsening and increased brittleness, and will also destroy the continuity of the base material, making it difficult to obtain a uniform and dense high-quality weld in subsequent full welding.

[0006] Therefore, how to reduce or even eliminate manual spot welding in the welding process of transformer tanks, achieve high-precision automatic positioning and reliable fixation of fins, and ensure the quality and efficiency of subsequent robotic full welding has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a transformer tank welding device, including a welding robot and two positioners installed on the welding robot. The welding robot is also provided with two alignment mechanisms corresponding to the positioners respectively. The alignment mechanisms are used to replace spot welding to directly fix the fins to the tank frame. The welding robot is also provided with a material unloading mechanism to align and place the fins on the tank frame.

[0008] The alignment mechanism includes a support component that is slidably mounted on the welding robot and used to move closer to or further away from the counterstrain positioner. The support component is provided with a plurality of rolling components arranged in a matrix. The rolling components fix the fins to the oil tank frame by extending into and rolling the limiting fins.

[0009] During welding, the load-bearing component drives the rolling component on it to rotate synchronously with the strain gauge, thereby continuously limiting the fins and sequentially retracting the rolling component to avoid the welding robot's welding torch.

[0010] The unloading mechanism includes an unloading frame connected to the welding robot via a movable component. The unloading frame is equipped with an adjustment component for adjusting the position of the fin plate by abutting against it. Two symmetrically arranged support plates are slidably disposed at the bottom of the unloading frame.

[0011] With the help of automatic adjustment of the fin position and fin tracking limit, the fin is directly welded and fixed to the fuel tank frame.

[0012] Preferably, the supporting component includes a base plate slidably connected to the welding robot, and the welding robot is fixedly mounted with two hydraulic cylinders corresponding to the base plate respectively, the telescopic section of the hydraulic cylinders being fixedly connected to the base plate.

[0013] Preferably, the bearing assembly further includes a mounting frame rotatably mounted on the substrate, on which a synchronous motor is fixedly mounted, and the output shaft of the synchronous motor is fixedly connected to the mounting frame.

[0014] Preferably, the rolling assembly is connected to the outside of the corresponding mounting frame, and the mounting frame and the strain gauge are arranged coaxially and rotate synchronously.

[0015] Preferably, the rolling assembly includes a track seat fixedly connected to the outside of the mounting frame, and a U-shaped frame is slidably connected to the side of the track seat away from the mounting frame.

[0016] Preferably, the two horizontal sections of the U-shaped frame are used to insert between two adjacent fins of the fin plate, and several rolling rollers are rotatably arranged at equal intervals along the length direction on both horizontal sections of the U-shaped frame.

[0017] Preferably, a lead screw for driving the U-shaped frame is rotatably mounted on the track base, and an actuator motor for driving the lead screw to rotate is fixedly installed on the track base.

[0018] Preferably, the moving component includes a rotating frame vertically slidably connected to the welding robot, the rotating frame being fixedly connected to the unloading frame, a synchronization frame being slidably arranged on the welding robot along an arc-shaped trajectory, the synchronization frame being slidably connected to the rotating frame vertically, and a second hydraulic cylinder for driving the rotating frame to rise and fall being fixedly installed on the synchronization frame.

[0019] Preferably, the adjustment component includes a movable frame slidably connected to the unloading frame. Two clamping plates are symmetrically slidably arranged on the movable frame for clamping and pushing the fin plate to the middle of the unloading frame. The movable frame pulls the clamping plates clamped on the fin plate, thereby causing the fin plate to abut against the unloading frame for alignment.

[0020] Preferably, two hydraulic cylinders three and one hydraulic cylinder four are fixedly installed on the movable frame. The telescopic section of hydraulic cylinder three is fixedly connected to the clamping plate at the corresponding position, and the telescopic section of hydraulic cylinder four is fixedly connected to the unloading frame.

[0021] Preferably, two cylinders are fixedly installed at the lower part of the feeding frame, and the extension sections of the two cylinders are respectively fixedly connected to the corresponding support plates.

[0022] The beneficial effects of this invention are as follows: First, this invention uses a material feeding mechanism to automatically adjust the position of the hoisted fin plates and accurately place them at the predetermined assembly position on the fuel tank frame, replacing the manual operation of placing them one by one. Then, the rolling component in the alignment mechanism directly presses and limits the fin plates that have been placed in place onto the fuel tank frame, eliminating the manual spot welding temporary fixing step in the traditional process. This achieves spot welding-free positioning and direct full welding processing of the fin plates on the fuel tank frame, which not only significantly shortens the welding manufacturing cycle of a single fuel tank and improves the overall production efficiency, but also avoids the damage to the continuity of the base material and the secondary remelting defects caused by manual spot welding, effectively improving the internal density and appearance quality of the full weld.

[0023] Second, this invention uses an adjustment component to automatically correct the position of the fin plate. When the fin plate falls into the range of the unloading frame, the two clamping plates extend synchronously under the drive of hydraulic cylinder three and clamp the fin plate from both sides, pushing the fin plate to the middle area of ​​the unloading frame. Then, hydraulic cylinder four drives the moving frame to retract as a whole, and the moving frame then pulls the clamping plates clamped on the fin plate, so that the edge of the fin plate abuts against the reference surface of the unloading frame. In this way, each fin plate is automatically and quickly adjusted to the precise welding position corresponding to the oil tank frame, further improving the accuracy and consistency of fin loading and positioning.

[0024] Third, this invention employs several independently retractable rolling components arranged in a matrix, in conjunction with a mounting frame that rotates synchronously with the positioner. The U-shaped frame of each rolling component can sequentially extend between adjacent fins of the fin plate according to the welding process, and press the fin plate tightly against the surface of the tank frame through rolling rollers. When the positioner drives the transformer tank to rotate to change the welding posture, the synchronous motor drives the mounting frame to drive all rolling components to rotate synchronously with the positioner on the same axis, maintaining stable limiting and fitting of the fin plate throughout the entire process, ensuring that the fin plate does not shift or deform during the welding process, thereby guaranteeing the quality of full weld. At the same time, by controlling the lead screw and the actuator motor, the U-shaped frame retracts sequentially to avoid the welding robot's welding torch travel path, ensuring the continuity of the full weld trajectory without releasing the fin plate fixation, and realizing high-quality and efficient automated welding operations. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the welding robot and positioner in this invention;

[0028] Figure 3 This is a schematic diagram of the structure of the welding robot, the moving component, the adjusting component, and the unloading frame in this invention;

[0029] Figure 4 This is a partial structural diagram of the synchronization frame, hydraulic cylinder II, feeding frame and positioner in this invention;

[0030] Figure 5 This is a partial cross-sectional view of the feeding frame, the moving frame, the hydraulic cylinder four, and the hydraulic cylinder three in this invention;

[0031] Figure 6 This is a schematic diagram of the structure when the two support plates are separated in this invention;

[0032] Figure 7 This is a schematic diagram of the structure of the substrate, synchronous motor, mounting frame and U-shaped frame in this invention;

[0033] Figure 8 This is a schematic diagram of the structure of the mounting frame, track seat, U-shaped frame and rolling roller in this invention;

[0034] Figure 9 This is a partial sectional view of the track seat, U-shaped frame, rolling roller and lead screw in the invention.

[0035] In the diagram: 1. Welding robot; 2. Positioner; 3. Alignment mechanism; 4. Unloading mechanism; 31. Bearing component; 32. Rolling component; 41. Moving component; 42. Adjusting component; 43. Support plate; 44. Unloading frame; 311. Base plate; 312. Hydraulic cylinder one; 313. Mounting frame; 314. Synchronous motor; 321. Track seat; 322. U-shaped frame; 323. Rolling roller; 324. Lead screw; 325. Actuating motor; 411. Rotating frame; 412. Synchronous frame; 413. Hydraulic cylinder two; 421. Moving frame; 422. Clamping plate; 423. Hydraulic cylinder three; 424. Hydraulic cylinder four; 441. Cylinder. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0037] See Figure 1 , Figure 2 and Figure 3 A transformer tank welding device includes a welding robot 1 and two positioners 2 mounted on the welding robot 1. The welding robot 1 is also equipped with two alignment mechanisms 3 corresponding to the positioners 2 respectively. The alignment mechanisms 3 are used to replace spot welding to directly fix the fins to the tank frame. The welding robot 1 is also equipped with a feeding mechanism 4 to align and place the fins on the tank frame.

[0038] When welding the transformer tank, the hoisting equipment first moves the prefabricated tank frame to the outside of the positioner 2 and fixes the tank frame through the positioner 2 so that the tank frame can rotate synchronously with the positioner 2. Then, the positioner 2 turns one side of the tank frame upward according to the preset program, and the hoisting equipment moves the prepared fin plate to the upper part of the tank frame. Then, the hoisting equipment places the fin plate in the unloading mechanism 4.

[0039] The feeding mechanism 4 automatically and quickly adjusts the position of the fin to accurately align with the predetermined assembly position on the upper side of the fuel tank frame. Then, the feeding mechanism 4 places the fin on the upper side of the fuel tank frame at the predetermined assembly position, and the alignment mechanism 3 fixes the fin to the fuel tank frame. Next, the feeding mechanism 4 resets, the positioner 2 rotates by a preset angle so that the side of the fuel tank frame without the fin faces upward. The alignment mechanism 3 then drives the fin fixed to the fuel tank frame to rotate synchronously, thereby maintaining the fixed connection between the fin and the fuel tank frame.

[0040] When the side of the fuel tank frame without fins is facing up, place and fix the fins on the fuel tank frame again until fins are fixed on all four sides of the fuel tank frame. Then move the unloading mechanism 4 to the position of another positioner 2 so that the fins are placed and fixed on the fuel tank frame at the other positioner 2 in sequence. At the same time, the welding robot 1 performs a direct full welding operation on the fuel tank frame with fins on all four sides.

[0041] After the welding of one transformer tank is completed, four fins are also fixed on the tank frame of another positioner 2. Then, the welding robot 1 performs a full welding operation again. During the welding process, the tank frame and fins are assembled again without spot welding. This alternating welding operation improves both welding quality and welding efficiency.

[0042] See Figure 1 , Figure 3 and Figure 4 The unloading mechanism 4 includes an unloading frame 44 connected to the welding robot 1 via a moving component 41. The unloading frame 44 is provided with an adjusting component 42 for adjusting the position of the fins by abutting against it. Two symmetrically arranged support plates 43 are slidably arranged at the bottom of the unloading frame 44.

[0043] When the fin plate is placed on the side of the tank frame facing upwards, in the initial state, the two support plates 43 abut against each other, thereby combining and covering the lower side of the unloading frame 44. When the hoisting equipment places the fin plate in the unloading frame 44, the two support plates 43 support the fin plate and make the lower side of the fin plate flush with the lower side of the unloading frame 44. Then, by adjusting the component 42 against the fin plate, the fin plate is adjusted to be directly above the preset assembly position. Then, the fin plate is moved down by the moving component 41.

[0044] During the downward movement, the support plate 43 is moved and separated so that the support plate 43 no longer obstructs the lower side of the feeding frame 44. During this process, the adjustment component 42 abuts against the fin plate, so that the fin plate and the feeding frame 44 move down synchronously until they move down a preset distance. Then, the fin plate is placed on the side of the oil tank frame facing upward, thus completing one adjustment and placement of the fin plate position.

[0045] To facilitate the confinement of the fin plate within the feed frame 44 when adjusting its position, the present invention designs the following structure: (See attached diagram) Figure 5 and Figure 6 Two cylinders 441 are fixedly installed at the lower part of the feeding frame 44, and the telescopic sections of the two cylinders 441 are fixedly connected to the corresponding support plates 43 respectively.

[0046] Retracting the telescopic sections of the two cylinders 441 causes the cylinders 441 to pull the support plate 43 towards the center of the unloading frame 44, so that the two support plates 43 combine to shield the lower side of the unloading frame 44 and support the fins when adjusting their position. Extending the telescopic sections of the two cylinders 441 moves the support plate 43 to the two sides of the unloading frame 44, so that the lower side of the fins can fit against the tank frame.

[0047] To facilitate adjusting the fin plate to be directly above the preset assembly position, the present invention is designed with the following structure: (See reference) Figure 3 , Figure 4 , Figure 5 and Figure 6 The adjustment component 42 includes a movable frame 421 slidably connected to the unloading frame 44. Two clamping plates 422 are symmetrically slidably arranged on the movable frame 421 for clamping and pushing the fin plate to the middle of the unloading frame 44. The movable frame 421 pulls the clamping plates 422 clamped on the fin plate, thereby causing the fin plate to abut against the unloading frame 44 for alignment.

[0048] See Figure 3 , Figure 4 and Figure 5 Two hydraulic cylinders 423 and one hydraulic cylinder 424 are fixedly installed on the moving frame 421. The telescopic section of the hydraulic cylinder 423 is fixedly connected to the clamping plate 422 at the corresponding position, and the telescopic section of the hydraulic cylinder 424 is fixedly connected to the unloading frame 44.

[0049] When the fin is placed on the upper side of the two support plates 43, the telescopic sections of the two hydraulic cylinders 423 extend simultaneously, causing the two clamping plates 422 to extend synchronously and clamp the fin from both sides, thereby pushing the fin to the middle area of ​​the unloading frame 44. Then, the telescopic section of the hydraulic cylinder 424 extends, causing the hydraulic cylinder 424 to drive the moving frame 421 to retract as a whole. The moving frame 421 then pulls the clamping plates 422 clamped on the fin, causing the fin to move until its edge abuts against the inner preset reference surface of the unloading frame 44. This automatically and quickly adjusts each fin to the precise welding position corresponding to the tank frame, further improving the accuracy and consistency of fin loading and positioning.

[0050] To facilitate the stable placement of the adjusted fins on the fuel tank frame, the present invention features the following structure: (See attached diagram) Figure 1 , Figure 3 and Figure 4 The moving component 41 includes a rotating frame 411 that is vertically slidably connected to the welding robot 1. The rotating frame 411 is fixedly connected to the unloading frame 44. A synchronous frame 412 is slidably arranged on the welding robot 1 along an arc-shaped trajectory. The synchronous frame 412 is slidably connected to the rotating frame 411 in a vertical direction. A hydraulic cylinder 413 that drives the rotating frame 411 to rise and fall is fixedly installed on the synchronous frame 412.

[0051] After adjusting the position of the fin plate, retract the telescopic section of hydraulic cylinder 413 to pull the rotating frame 411 down, causing the rotating frame 411 to drive the unloading frame 44 down synchronously. The unloading frame 44 drives the fin plate down through the clamping plate 422. During this process, the two support plates 43 separate, fully exposing the lower side of the fin plate. At this time, the fin plate is clamped and supported by the clamping plate 422, so that the fin plate will still fall down with the unloading frame 44. Finally, the fin plate is placed in the preset assembly position of the oil tank frame.

[0052] It should be noted that the rotating frame 411 in this embodiment adopts a mature rotating table solution in the prior art, which will not be elaborated here. This allows the rotating frame 411 to rotate autonomously. When the rotating frame 411 rotates, it drives the hydraulic cylinder 413 to move synchronously through the synchronous frame 412, so that the unloading frame 44 can move from one positioner 2 to another positioner 2, thereby performing continuous unloading operations.

[0053] See Figure 1 , Figure 7 and Figure 8 The alignment mechanism 3 includes a bearing assembly 31 that is slidably mounted on the welding robot 1 and used to move closer to or away from the strain gauge 2. The bearing assembly 31 is provided with a plurality of rolling assemblies 32 arranged in a matrix. The rolling assemblies 32 fix the fins to the oil tank frame by extending into and rolling the limiting fins.

[0054] Before and after welding the fins, the load-bearing component 31 is located away from the positioner 2, which makes it easier to place the tank frame on the positioner 2 and to remove the welded transformer tank from the positioner 2.

[0055] When a fin is placed on the tank frame, a rolling assembly 32 corresponding to that fin extends out, allowing the rolling assembly 32 to extend into the gap between two adjacent fins of the fin. The rolling assembly limits the fin by rolling, thus fixing the fin to the tank frame. When the positioner 2 rotates the tank frame to change the fin assembly, the bearing assembly 31 drives the rolling assembly 32 on it to rotate synchronously with the positioner 2, thereby continuously limiting the assembled fin. As a result, all four sides of the tank frame are equipped with fins, thus replacing the traditional manual spot welding fixing method.

[0056] During welding, the corresponding rolling components 32 are retracted sequentially according to the direction of travel of the welding gun of the welding robot 1, so that the rolling components 32 avoid the welding gun of the welding robot 1. This ensures the continuity of the full welding trajectory without removing the fin plate fixation, thus achieving high-quality and high-efficiency automated welding operations.

[0057] To facilitate the placement of the tank frame onto the positioner 2, and to facilitate the removal of the already welded transformer tank from the positioner 2, the present invention designs the following structure: (See attached diagram) Figure 1 and Figure 7 The support component 31 includes a base plate 311 slidably connected to the welding robot 1. The welding robot 1 is fixedly mounted with two hydraulic cylinders 312 corresponding to the base plate 311 respectively. The telescopic section of the hydraulic cylinder 312 is fixedly connected to the base plate 311. The support component 31 also includes a mounting frame 313 rotatably disposed on the base plate 311. The rolling component 32 is connected to the outside of the corresponding mounting frame 313.

[0058] When the extension section of the hydraulic cylinder 312 extends, it pushes the base plate 311 away from the corresponding positioner 2, so that the base plate 311 drives the rolling assembly 32 on it to move away from the corresponding positioner 2 simultaneously through the mounting frame 313, which facilitates the placement of the tank frame and the removal of the welded transformer tank. When the extension section of the hydraulic cylinder 312 retracts, the rolling assembly 32 moves closer to the corresponding positioner 2, which facilitates the rolling assembly 32 to perform spot welding-free limiting on the fins.

[0059] To ensure that the rolling assembly 32 can continue to stably limit the movement of the fins while the positioner 2 is rotating, the present invention designs the following structure: (See attached diagram) Figure 7 and Figure 8 A synchronous motor 314 is fixedly mounted on the substrate 311. The output shaft of the synchronous motor 314 is fixedly connected to the mounting frame 313. The mounting frame 313 is coaxially arranged with the strain gauge 2, and the two rotate synchronously.

[0060] When the positioner 2 rotates, the synchronous motor 314 drives the mounting frame 313 corresponding to the positioner 2 to rotate synchronously and in the same direction, so that the mounting frame 313 drives the rolling assembly 32 on it to rotate with the positioner 2, thereby keeping the relative position of the rolling assembly 32 and the fin plate that is limited by it unchanged, thus maintaining the connection between the fin plate and the oil tank frame.

[0061] To facilitate the positioning of the finned plate of the rolling assembly 32, the present invention designs the following structure: (See reference) Figure 7 , Figure 8 and Figure 9 The rolling assembly 32 includes a track seat 321 fixedly connected to the outside of the mounting frame 313. A U-shaped frame 322 is slidably connected to the side of the track seat 321 away from the mounting frame 313. Two horizontal sections of the U-shaped frame 322 are used to insert between two adjacent fins of the fin plate. Several rolling wheels 323 are rotatably arranged at equal intervals along the length direction on both horizontal sections of the U-shaped frame 322. A lead screw 324 for driving the U-shaped frame 322 is rotatably arranged on the track seat 321. An actuator motor 325 for driving the lead screw 324 to rotate is fixedly installed on the track seat 321.

[0062] After the fin is placed in the predetermined assembly position of the fuel tank frame, the actuator 325 is started. The actuator 325 drives the lead screw 324 on the corresponding track seat 321 to rotate. The rotation of the lead screw 324 causes the U-shaped frame 322, which is in mate with its threaded pair, to slide and extend along the track seat 321 toward the fuel tank frame. This allows the two horizontal sections of the U-shaped frame 322 to be precisely inserted into the gap between two adjacent fins in the fin. As the U-shaped frame 322 continues to feed, the outer circumferential surfaces of several rolling rollers 323 distributed on the two horizontal sections first contact the surface of the fin. Then, under the thrust of the U-shaped frame 322, the rolling rollers 323 apply uniform rolling pressure to the fin, firmly pressing the fin against the surface of the fuel tank frame. This replaces the traditional manual welding positioning with a mechanical rolling non-spot welding method, achieving reliable pre-fixation of the fin before full welding.

[0063] When the positioner 2 drives the tank frame to rotate and change its surface or adjust its welding posture, the synchronous motor 314 drives the mounting frame 313 to rotate synchronously with the positioner 2 on the same axis. This causes all the track seats 321 and U-shaped frames 322 fixed to the outside of the mounting frame 313 and their limiting fins to rotate with the tank frame as a whole. This maintains the continuous pressing state of the rolling roller 323 on the fins, effectively preventing the fins from shifting or loosening due to gravity or rotational inertia, and ensuring the consistency and stability of the positioning of all fins during multi-faceted assembly.

[0064] When the welding robot 1 is performing continuous full welding operations, the host computer sends commands to the corresponding actuator motor 325 according to the real-time travel trajectory of the welding torch, driving the lead screw 324 to reverse so that the U-shaped frame 322 retracts along the track seat 321, so that the rolling roller 323 at that location releases its partial obstruction of the fin plate and avoids the travel path of the welding torch, while the U-shaped frame 322 at other locations remains in an extended and pressed state.

[0065] When the welding torch moves past the current position and reaches the area of ​​the next U-shaped frame 322, the host computer controls the previously retracted actuator motor 325 to rotate forward, driving the lead screw 324 to extend and reset the U-shaped frame 322, causing the rolling roller 323 to press the fins again. Meanwhile, the U-shaped frame 322 corresponding to the current position of the welding torch retracts to avoid the weld. Through this alternating extension and retraction control logic, it is ensured that at any time during the welding process, at least two U-shaped frames 322 are in the extended state and rolling and limiting the fins. This ensures the continuous and unobstructed passage of the full welding trajectory without releasing the overall fixed constraint of the fins, ultimately achieving high-quality and high-efficiency automated operation of transformer tank fin assembly and welding.

[0066] Although this invention adds structures such as the rolling assembly 32, the support plate 43, and the adjustment assembly 42 to the traditional welding equipment, which increases the initial investment cost of the equipment to some extent, this invention achieves automatic alignment of the fins, mechanical rolling fixation, and synchronous rotation limit with the positioner 2. It eliminates the manual spot welding positioning process in the traditional process, shortens the manufacturing cycle of a single transformer tank, and significantly improves the output capacity per unit time. At the same time, since it eliminates welding defects such as pre-damage to the base material, secondary remelting porosity, and stress concentration caused by manual spot welding, the first-pass yield of the weld is significantly improved, effectively reducing the rework and repair costs and after-sales quality losses caused by oil leakage. Therefore, the comprehensive economic benefits of this invention in improving welding quality and production efficiency can quickly balance and cover the increased structural investment costs in the early stage, and has significant economic and engineering practicality.

[0067] This invention is a specialized design for the structural characteristics and welding process difficulties of corrugated transformer tanks, a special workpiece. Corrugated transformer tanks are welded together by a tank frame and closely arranged heat dissipation fins on the outside. The sealing and consistency of the welds directly determine the reliability of the insulating oil sealing and the heat dissipation efficiency of the transformer during operation. Once there are defects such as porosity, lack of fusion or cracks in the welds, it will lead to oil leakage accidents, which will seriously threaten the safe and stable operation of power grid equipment.

[0068] This invention utilizes an independently extendable U-shaped frame 322 and a rolling roller 323 to mechanically press the fins together. A synchronous motor 314 drives the mounting frame 313 to move synchronously with the positioner 2. During full welding, the rolling assembly 32 alternately extends and retracts to avoid the welding torch path and always maintains at least two limiting points. This invention efficiently adapts to the process requirements of continuous welding of long straight weld seams in corrugated oil tanks. Therefore, this invention is indispensable for ensuring the welding quality of corrugated transformer oil tanks and improving manufacturing efficiency.

[0069] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A transformer tank welding device, comprising a welding robot and two positioners mounted on the welding robot, characterized in that, The welding robot is also equipped with two alignment mechanisms corresponding to the positioner. The alignment mechanism is used to replace spot welding to directly fix the fins to the oil tank frame. The welding robot is also equipped with a feeding mechanism to align and place the fins on the oil tank frame. The alignment mechanism includes a bearing component that is slidably mounted on the welding robot and used to move closer to or further away from the strain gauge. The bearing component is provided with a plurality of rolling components arranged in a matrix. The rolling components fix the fin plate to the oil tank frame by extending into and rolling the limiting fin plate. During welding, the load-bearing component drives the rolling component on it to rotate synchronously with the strain gauge, thereby continuously limiting the fins and retracting the rolling component in sequence to avoid the welding robot's welding gun. The unloading mechanism includes an unloading frame connected to the welding robot via a movable component. The unloading frame is equipped with an adjustment component for adjusting the position of the fin plate by abutting against it. Two symmetrically arranged support plates are slidably disposed at the bottom of the unloading frame. With the help of automatic adjustment of the fin position and fin follow-up limit, the fin is directly welded and fixed to the fuel tank frame.

2. The transformer tank welding device according to claim 1, characterized in that, The supporting component includes a base plate that is slidably connected to the welding robot. The welding robot is fixedly mounted with two hydraulic cylinders, each corresponding to the base plate. The telescopic section of the hydraulic cylinder is fixedly connected to the base plate.

3. The transformer tank welding device according to claim 2, characterized in that, The load-bearing component also includes a mounting frame rotatably mounted on the substrate, on which a synchronous motor is fixedly mounted, and the output shaft of the synchronous motor is fixedly connected to the mounting frame.

4. The transformer tank welding device according to claim 3, characterized in that, The rolling assembly is connected to the outside of the corresponding mounting frame, and the mounting frame and the strain gauge are arranged coaxially and rotate synchronously.

5. A transformer tank welding device according to claim 3, characterized in that, The rolling assembly includes a track seat fixedly connected to the outside of the mounting frame, and a U-shaped frame slidably connected to the side of the track seat away from the mounting frame.

6. The transformer tank welding device according to claim 5, characterized in that, The two horizontal sections of the U-shaped frame are used to insert between two adjacent fins of the fin plate. Several rolling rollers are rotatably arranged at equal intervals along the length direction on both horizontal sections of the U-shaped frame.

7. A transformer tank welding device according to claim 5, characterized in that, The track base is rotatably equipped with a lead screw for driving the U-shaped frame, and an actuator motor for driving the lead screw to rotate is fixedly installed on the track base.

8. The transformer tank welding device according to claim 1, characterized in that, The moving component includes a rotating frame that is vertically slidably connected to the welding robot. The rotating frame is fixedly connected to the unloading frame. A synchronization frame is slidably installed on the welding robot along an arc-shaped trajectory. The synchronization frame is slidably connected to the rotating frame in a vertical manner. A hydraulic cylinder two that drives the rotating frame to rise and fall is fixedly installed on the synchronization frame.

9. A transformer tank welding device according to claim 1, characterized in that, The adjustment component includes a movable frame slidably connected to the unloading frame. Two clamping plates are symmetrically slidably arranged on the movable frame for clamping and pushing the fin plate to the middle of the unloading frame. The movable frame pulls the clamping plates clamped on the fin plate, thereby causing the fin plate to abut against the unloading frame for alignment.

10. A transformer tank welding device according to claim 1, characterized in that, Two cylinders are fixedly installed at the bottom of the feeding frame, and the extension sections of the two cylinders are respectively fixedly connected to the corresponding support plates.

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