Automatic welding device for producing transformer oil tank

Abstract

The invention discloses an automatic welding device for producing a transformer oil tank, which comprises a supporting and fixing device, a mechanical arm, a transformer oil tank shell and cooling fins, the mechanical arm is arranged on one side of the supporting and fixing device, and a welding gun is arranged on the mechanical arm; the supporting and fixing device comprises a positioning and fixing mechanism, a fixing mechanism and a bottom supporting frame, the positioning and fixing mechanism and the fixing mechanism are symmetrically arranged above the bottom supporting frame, one end of the top end of the bottom supporting frame is fixedly connected with an installation support, and a servo motor is fixedly installed at the top end of the installation support. The transformer oil tank shell is positioned and fixed in the horizontal direction and the vertical direction, the overturning face of the transformer oil tank shell is adjusted through the servo motor, time and labor are greatly saved, the overall welding progress is accelerated, and the transformer oil tank shell is more convenient to disassemble through the movable design of the sliding supporting plate.

Description

Technical Field

[0001] The invention relates to the field of transformer manufacturing, in particular to an automatic welding device for producing transformer oil tanks. Background Art

[0002] In the field of transformer manufacturing, welding of the transformer oil tank shell and the cooling fins is a key process, and its quality directly affects the heat dissipation performance, overall reliability and service life of the transformer.

[0003] In traditional welding operations, the transformer oil tank shell is placed on a workbench or on the ground and fixed and welded using clamping tools. After one side of the welding is completed, the fixing device needs to be removed and the transformer oil tank shell needs to be turned over and fixed and welded again. As a result, the welding process of a transformer oil tank shell requires four fixing and removal operations. In addition, each fixing operation requires the transformer oil tank shell to be positioned so that the robotic arm can perform automatic welding, which increases the workload and reduces production efficiency. Therefore, an automatic welding device for transformer oil tank production is urgently needed to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide an automatic welding device for producing transformer oil tanks to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an automatic welding device for producing transformer oil tanks, comprising a supporting and fixing device, a mechanical arm, a transformer oil tank shell and a heat dissipation fin, wherein the mechanical arm is arranged on one side of the supporting and fixing device, and a welding gun is arranged on the mechanical arm, and the supporting and fixing device comprises a positioning and fixing mechanism, a fixing mechanism and a bottom support frame, wherein the positioning and fixing mechanism and the fixing mechanism are symmetrically arranged above the bottom support frame, one end of the top end of the bottom support frame is fixedly connected to a mounting bracket, a servo motor is fixedly installed on the top end of the mounting bracket, a connecting shaft plate is rotatably connected to the side of the top end of the mounting bracket close to the driving end of the servo motor, and the driving end of the servo motor is fixedly mounted on the connecting shaft plate;

[0006] The positioning and fixing mechanism includes a rotating plate, a first fixing bracket is fixedly installed on the middle part of one side of the rotating plate, a first fixing plate is symmetrically fixedly installed on the side of the rotating plate close to the first fixing bracket, a second fixing plate is symmetrically fixedly installed on the side of the rotating plate close to the first fixing bracket, two sliding brackets are symmetrically provided on the side of the rotating plate close to the first fixing bracket, and one end of the sliding bracket away from the rotating plate is fixedly connected to the positioning inclined plate, and the one end of the first fixing bracket away from the rotating plate is symmetrically and movably connected to two first sliding clamping plates;

[0007] The fixing mechanism includes a support plate, the top of the support plate is movably connected to a sliding support plate, the upper part of the support plate is movably connected to a sliding bracket, the sliding bracket is rotatably connected to a second fixed bracket on the side away from the sliding support plate, and the inner side of the second fixed bracket is symmetrically and movably connected to two second sliding clamps.

[0008] The cam is secured to the first and second support brackets and has a locking mechanism which allows the locking cam to lock the first and second support brackets and lock the locking mechanism.

[0009] Preferably, the fixing portion is located inside the first fixing bracket close to one end of the rotating plate, and the first fixing bracket is evenly and symmetrically provided with a first sliding groove at one end away from the rotating plate, and the first sliding splint is slidably connected to the first fixing bracket through the first sliding groove, and a first bidirectional threaded rod is rotatably installed inside the first fixing bracket, and a first knob is fixedly installed on the top end of the first bidirectional threaded rod, and a plug is fixedly installed on the top and bottom ends of the first fixing bracket close to the first sliding groove respectively.

[0010] The top end face of said sliding panel also is provided with an interlocking structure, and the interlocking ends of said sliding panel withstands on the back end of the second end of the gear train, and the second end of the sliding panel withstands on the back end of the gear train.

[0011] Preferably, the second sliding splint is fixedly connected to a clamping plate at one end away from the side of the second fixed bracket and away from the middle of the second fixed bracket, the threads at the outer ends of the second bidirectional threaded rod are symmetrically arranged, and the two second sliding splints are symmetrically threadedly connected to the two ends of the second bidirectional threaded rod.

[0012] Preferably, the upper gear guide rail and the lower gear guide rail are both movably inserted into the inner side of the limiting groove, the upper gear guide rail is meshedly connected to the top end of the gear, the lower gear guide rail is meshedly connected to the bottom end of the gear, and the extension rod is slidably connected to the inner side of the limiting groove.

[0013] Preferably, the two ends of the first bidirectional threaded rod are respectively rotatably connected to the two plugs, the threads at the two outer ends of the first bidirectional threaded rod are symmetrically arranged, the two first sliding splints are symmetrically threadedly connected to the two ends of the first bidirectional threaded rod, and the rotating plate is fixedly installed on the side of the connecting shaft plate away from the servo motor.

[0014] Preferably, the support plate is fixedly mounted on an end of the top end of the bottom support frame away from the mounting bracket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention positions and fixes the transformer oil tank shell in the horizontal and vertical directions, and adjusts the transformer oil tank shell flipping by a servo motor, thereby improving processing efficiency. In the horizontal direction, the positioning inclined plate, the sliding bracket, the extension rod, the gear guide rail and the gear are cleverly matched to realize the synchronous movement of the two positioning inclined plates toward or in the opposite direction. The transformer oil tank shell is used to push the positioning inclined plate to move, which can automatically and accurately position the transformer oil tank shell in the center position of the positioning and fixing mechanism. In the vertical direction, the two-way threaded rod is used to control different sliding clamps and clamping plates to move toward or in the opposite direction synchronously, thereby realizing the centering fixation of the oil tank shell, and ensuring that the oil tank shell is in the center position of the positioning and fixing mechanism and the fixing mechanism in the horizontal and vertical directions before welding. The servo motor drives the transformer oil tank shell to rotate and adjust the welding surface, which can be positioned and fixed once. Compared with the traditional method of adjusting the position of each surface one by one for welding, this invention greatly saves time and manpower, speeds up the overall progress of welding, and the movable design of the sliding support plate makes the process of removing the transformer oil tank shell more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the second state structure of the main body of the present invention;

[0019] Figure 3 Schematic diagram of the supporting and fixing device structure in the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the positioning and fixing mechanism in the present invention;

[0021] Figure 5 This is a schematic diagram of the split structure of the positioning and fixing mechanism in the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the first fixing bracket in the present invention;

[0023] Figure 7 Schematic diagram of the fixing mechanism structure of the present invention;

[0024] Figure 8 It is a schematic diagram of the bottom structure of the fixing mechanism in the present invention.

[0025] In the figure: 1-support fixing device, 2-mechanical arm, 3-positioning fixing mechanism, 4-fixing mechanism, 5-transformer oil tank shell, 6-heat dissipation fins, 7-bottom support frame, 8-mounting bracket, 9-servo motor, 10-connecting shaft plate, 11-rotating plate, 12-first fixing bracket, 13-first fixing plate, 14-second fixing plate, 15-first sliding rod, 16-energy storage spring, 17-sliding bracket, 18-positioning inclined plate, 19-extension rod, 20-upper gear guide rail, 21-lower gear guide rail, 22- Fixed part, 23-limiting groove, 24-gear, 25-limiting slide, 29-first slide, 30-first sliding splint, 31-plug, 32-first two-way threaded rod, 33-first knob, 34-support plate, 35-second slide, 36-sliding support plate, 37-sliding bracket, 38-second slide, 39-locking bolt, 40-threaded rod, 41-second fixed bracket, 42-third slide, 43-second sliding splint, 44-clamping plate, 45-second two-way threaded rod, 46-second knob. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1 、 Figure 2 、 Figure 3, the present invention provides an embodiment: an automatic welding device for producing transformer oil tanks, comprising a supporting and fixing device 1, a robotic arm 2, a transformer oil tank shell 5 and a heat dissipation fin 6, the robotic arm 2 is arranged on one side of the supporting and fixing device 1, and a welding gun is arranged on the robotic arm 2, the supporting and fixing device 1 comprises a positioning and fixing mechanism 3, a fixing mechanism 4 and a bottom support frame 7, the positioning and fixing mechanism 3 and the fixing mechanism 4 are symmetrically arranged above the bottom support frame 7, one end of the top of the bottom support frame 7 is fixedly connected to a mounting bracket 8, a servo motor 9 is fixedly installed on the top of the mounting bracket 8, the top of the mounting bracket 8 is rotatably connected to a connecting shaft plate 10 near the driving end of the servo motor 9, and the driving end of the servo motor 9 is fixedly mounted on the connecting shaft plate 10.

[0028] See Figure 4 、 Figure 5 and Figure 6 The positioning and fixing mechanism 3 includes a rotating plate 11, a first fixing bracket 12 is fixedly installed in the middle of one side of the rotating plate 11, a first fixing plate 13 is symmetrically fixedly installed on the side of the rotating plate 11 close to the first fixing bracket 12, a second fixing plate 14 is symmetrically fixedly installed on the side of the rotating plate 11 close to the first fixing bracket 12, two sliding brackets 17 are symmetrically provided on the side of the rotating plate 11 close to the first fixing bracket 12, and the sliding bracket 17 is fixedly connected to a positioning inclined plate 18 at one end away from the rotating plate 11. The positioning inclined plate 18 is inserted into the inner side of the transformer oil tank casing 5, and the first fixing bracket 12 is symmetrically and movably connected to two first sliding clamps 30 at one end away from the rotating plate 11. The two first sliding clamps 30 clamp and fix the transformer oil tank casing 5.

[0029] The first fixed plate 13 and the second fixed plate 14 are symmetrically distributed on both sides of the first fixed bracket 12. Two first sliding rods 15 are symmetrically fixedly installed between the first fixed plate 13 and the second fixed plate 14 on the same side of the first fixed bracket 12. An energy storage spring 16 is nested on the first sliding rod 15. The sliding bracket 17 is slidably connected to the first sliding rod 15. The energy storage spring 16 is located between the sliding bracket 17 and the second fixed plate 14. When the transformer oil tank shell 5 moves toward the rotating plate 11, the inner side wall of the open end of the transformer oil tank shell 5 squeezes the two positioning inclined plates 18 located on the inner side of the transformer oil tank shell 5 to move toward the middle of the rotating plate 11. The positioning inclined plates 18 drive the sliding bracket 17 to move synchronously and squeeze the energy storage spring 16 to contract. When the transformer oil tank shell 5 is disassembled, the energy storage spring 16 rebounds and pushes the sliding bracket 17 to return to its initial position. A limiting sliding groove 25 is provided through the middle of the second fixed plate 14. A fixing part 22 is fixedly installed on the middle of one side of the rotating plate 11 close to the first fixed bracket 12. A limiting groove 23 is provided on the fixing part 22. The inner side of the groove 23 is rotatably connected to the gear 24, and the end of the sliding bracket 17 close to the fixed part 22 is fixedly connected to the extension rod 19, the bottom end of one extension rod 19 close to the fixed part 22 is fixedly connected to the lower gear guide rail 21, and the top end of the other extension rod 19 close to the fixed part 22 is fixedly connected to the upper gear guide rail 20. The upper gear guide rail 20 and the lower gear guide rail 21 are both movably plugged into the inner side of the limit groove 23, the upper gear guide rail 20 is meshed with the top end of the gear 24, and the lower gear guide rail 21 is meshed with the upper gear guide rail 21. At the bottom end of the gear 24, the meshing connection of the gear 24 enables the upper gear guide rail 20 and the lower gear guide rail 21 to move synchronously toward or in opposite directions. The synchronous movement of the upper gear guide rail 20 and the lower gear guide rail 21 drives the two sliding brackets 17 to move synchronously through the extension rod 19, thereby driving the two positioning inclined plates 18 to move synchronously, thereby ensuring that the distance between the two positioning inclined plates 18 and the center point of the rotating plate 11 is the same, thereby centering the transformer oil tank casing 5, and the extension rod 19 is slidably connected to the inner side of the limiting slide groove 25.

[0030] The fixing portion 22 is located inside the first fixing bracket 12 near one end of the rotating plate 11, and the first sliding groove 29 is evenly and symmetrically opened at the end of the first fixing bracket 12 away from the rotating plate 11. The first sliding splint 30 is slidably connected to the first fixing bracket 12 through the first sliding groove 29, and the first sliding splint 30 is positioned by the first sliding groove 29. A first two-way threaded rod 32 is rotatably installed inside the first fixing bracket 12, and a first knob 33 is fixedly installed on the top of the first two-way threaded rod 32. The top and bottom ends of the first fixing bracket 12 near the first sliding groove 29 are respectively fixed with plugs 31 to prevent the first sliding splint 30 from sliding off. The two ends of the first two-way threaded rod 32 rotate respectively. Connected to the two plugs 31, the threads at the outer ends of the first bidirectional threaded rod 32 are symmetrically arranged, and the two first sliding splints 30 are symmetrically threadedly connected to the two ends of the first bidirectional threaded rod 32. When the first bidirectional threaded rod 32 is driven to rotate by the first knob 33, the first bidirectional threaded rod 32 pushes the two first sliding splints 30 to move synchronously toward or in the opposite direction. When the two first sliding splints 30 move in opposite directions to close to the inner wall of the transformer oil tank casing 5, the transformer oil tank casing 5 is centrally positioned and fixed. The rotating plate 11 is fixedly installed on the side of the connecting shaft plate 10 away from the servo motor 9. The driving end of the servo motor 9 drives the connecting shaft plate 10 to rotate, and the rotation of the connecting shaft plate 10 drives the rotating plate 11 to rotate.

[0031] See Figure 7 and Figure 8The fixing mechanism 4 includes a support plate 34, which is fixedly mounted on the top end of the bottom support frame 7 away from the mounting bracket 8. The top end of the support plate 34 is movably connected to a sliding support plate 36. The upper part of the support plate 34 is movably connected to a sliding bracket 37. The sliding bracket 37 is rotatably connected to a second fixed bracket 41 on the side away from the sliding support plate 36. The inner side of the second fixed bracket 41 is symmetrically movably connected to two second sliding splints 43. Two second sliding rods 35 are symmetrically fixedly mounted on the top end of the support plate 34. The sliding bracket 37 is slidably connected to the two second sliding splints 43. The sliding support plate 36 is threadedly connected to the rod 35, and the threaded rod 40 is threadedly connected to the sliding support plate 36. The end of the threaded rod 40 close to the sliding bracket 37 is rotatably connected to the sliding bracket 37. The end of the support plate 34 close to the sliding support plate 36 is symmetrically provided with two second sliding grooves 38. The sliding support plate 36 is slidably connected to the support plate 34 through the second sliding grooves 38. At the same time, the sliding support plate 36 is limited by the second sliding grooves 38 to prevent the sliding support plate 36 from rotating, thereby affecting the threaded rod 40 from pushing the sliding bracket 37. The bottom end of the sliding support plate 36 is threadedly connected to a locking bolt 3 9, the threaded end of the locking bolt 39 is in contact with the bottom end of the support plate 34, and the sliding support plate 36 can be locked when the threaded end of the locking bolt 39 is close to the bottom end of the support plate 34. At this time, the threaded rod 40 is rotated to push the sliding bracket 37 to slide on the second slide rod 35. The movement of the sliding bracket 37 pushes the second fixed bracket 41 to move, thereby fine-tuning so that the second fixed bracket 41 and the first fixed bracket 12 squeeze and fix the transformer tank housing 5 in the middle position. The second fixed bracket 41 is symmetrically opened on the inner side of the end away from the sliding bracket 37. The slide groove 42 and the two sides of the second sliding splint 43 are respectively slidably connected to the inner sides of the two third slide grooves 42, and the second fixed bracket 41 is internally rotatably connected to the second bidirectional threaded rod 45. The top of the second bidirectional threaded rod 45 is fixedly installed with a second knob 46. The second sliding splint 43 is fixedly connected to the clamping plate 44 at one end away from the second fixed bracket 41 and away from the middle of the second fixed bracket 41. The threads at the two ends of the outer side of the second bidirectional threaded rod 45 are symmetrically arranged, and the two second sliding splints 43 are symmetrically threadedly connected to the two ends of the second bidirectional threaded rod 45.

[0032] Working principle: During use, first fix the transformer oil tank shell 5 between the positioning and fixing mechanism 3 and the fixing mechanism 4, and place the transformer oil tank shell 5 between the positioning and fixing mechanism 3 and the fixing mechanism 4 by external force, and the open end of the transformer oil tank shell 5 is located at the positioning and fixing mechanism 3, and then push the transformer oil tank shell 5 close to the positioning inclined plate 18 by external force, and insert both positioning inclined plates 18 into the inner side of the open end of the transformer oil tank shell 5, and when the inner side wall of the transformer oil tank shell 5 contacts the positioning inclined plate 18, adjust the position of the transformer oil tank shell 5 so that the inner side walls at both ends of the transformer oil tank shell 5 are respectively close to the two positioning inclined plates 18, and at the same time push the transformer oil tank shell 5 close to the first fixing bracket 12, and the transformer oil tank shell 5 is in When moving close to the first fixed bracket 12, the inner side wall of the transformer oil tank shell 5 pushes the two positioning inclined plates 18 to move toward the middle. The movement of the positioning inclined plates 18 drives the sliding bracket 17 to slide on the first slide bar 15. The movement of the sliding bracket 17 pushes the extension rod 19 to slide on the inner side of the limiting slide groove 25, and at the same time squeezes the energy storage spring 16 to contract. Since the upper gear guide rail 20 is meshed and connected to the top end of the gear 24, and the lower gear guide rail 21 is meshed and connected to the bottom end of the gear 24, the extension rods 19 located on both sides of the fixed part 22 respectively push the upper gear guide rail 20 and the lower gear guide rail 21 to move toward each other synchronously, thereby keeping the transformer oil tank shell 5 in the center position of the positioning and fixing mechanism 3, thereby performing horizontal center positioning of the transformer oil tank shell 5;

[0033] Then, the second fixed bracket 41 is pushed close to the sealed end of the transformer tank housing 5 by external force. The movement of the second fixed bracket 41 drives the sliding bracket 37 to slide on the second slide rod 35. The movement of the sliding bracket 37 drives the threaded rod 40 and the sliding support plate 36 to move synchronously. When the side of the second sliding clamping plate 43 away from the second fixed bracket 41 contacts the sealed end of the transformer tank housing 5, and the open end of the transformer tank housing 5 contacts the end of the first fixed bracket 12 away from the rotating plate 11, the locking bolt 39 is screwed close to the support plate 34 by external force until the threaded end of the locking bolt 39 is tightly attached to the second fixed bracket 41. The bottom end of the support plate 34, the sliding support plate 36 is fixed at this time, and the horizontal position of the second fixing bracket 41 is fixed synchronously. At this time, the two first sliding clamping plates 30 are away from the end of the first two-way threaded rod 32 and are located inside the open end of the transformer tank shell 5. The two clamping plates 44 are respectively located at the top and bottom ends of the transformer tank shell 5. Then, the transformer tank shell 5 is vertically positioned. The first knob 33 is rotated by external force. The rotation of the first knob 33 drives the first two-way threaded rod 32 to rotate. Since the threads at the two ends of the outer side of the first two-way threaded rod 32 are symmetrically arranged, the two first The sliding splints 30 are symmetrically threadedly connected to the two ends of the first bidirectional threaded rod 32, so the rotation of the first bidirectional threaded rod 32 drives the two first sliding splints 30 to move synchronously in opposite directions, the first sliding splint 30 located at the top moves upward, and the first sliding splint 30 located at the bottom moves downward, until the top end of the first sliding splint 30 located at the top is tightly against the top end of the inner wall of the transformer oil tank shell 5, and the bottom end of the first sliding splint 30 located at the bottom is tightly against the bottom end of the inner wall of the transformer oil tank shell 5, and then the second knob 46 is rotated by external force, and the rotation of the second knob 46 drives the second bidirectional threaded rod 45 rotates, and since the threads at the outer ends of the second bidirectional threaded rod 45 are symmetrically arranged, the two second sliding clamping plates 43 are symmetrically threadedly connected to the two ends of the second bidirectional threaded rod 45. Therefore, the rotating second bidirectional threaded rod 45 drives the two second sliding clamping plates 43 to move synchronously toward each other, and the movement of the second sliding clamping plates 43 drives the clamping plates 44 to move synchronously until the bottom end of the clamping plate 44 located on the upper side is in close contact with the top end of the transformer oil tank housing 5, and the top end of the clamping plate 44 located on the lower side is in close contact with the bottom end of the transformer oil tank housing 5. At this time, the center position of the transformer oil tank housing 5 in the vertical direction is fixed;

[0034] Then, the threaded rod 40 is rotated by external force to approach the second fixed bracket 41. Since the threaded rod 40 is threadedly connected to the sliding support plate 36 and the sliding support plate 36 is fixed, the rotation of the threaded rod 40 pushes the sliding bracket 37 to move close to the transformer oil tank casing 5. The movement of the sliding bracket 37 drives the second fixed bracket 41 to move until the second sliding clamping plate 43 is close to the sealed end of the transformer oil tank casing 5, and the open end of the transformer oil tank casing 5 is close to the first fixed bracket 12. At this time, the transformer oil tank casing 5 is centrally fixed on the supporting fixture 1, and then the welding operation can be carried out. The heat dissipation fin 6 is placed on the top of the transformer oil tank casing 5 by external force, and the heat dissipation fin 6 is pre-welded to the transformer oil tank casing 5 by spot welding with a welding gun. After one heat dissipation fin 6 is pre-welded, the servo motor 9 is started, and the driving end of the servo motor 9 drives the connecting shaft plate 10 to rotate, and the connecting shaft plate 10 The rotation of the rotating plate 11 drives the rotating plate 11 to rotate, and the rotation of the rotating plate 11 drives the transformer oil tank casing 5 to rotate ninety degrees to pre-weld the second heat dissipation fin 6. The four surfaces on the outside of the transformer oil tank casing 5 are pre-welded in turn, and then the robotic arm 2 is started for fine welding. After welding is completed, the transformer oil tank casing 5 is supported by external force, and the first two-way threaded rod 32 and the second two-way threaded rod 45 are rotated respectively. The rotation of the first two-way threaded rod 32 drives the two first sliding splints 30 to move toward each other, and the rotation of the second two-way threaded rod 45 drives the two second sliding splints 43 to move in the opposite direction. Then, the locking bolt 39 is rotated away from the support plate 34 by external force, and the second fixed bracket 41 is pushed away from the transformer oil tank casing 5. Then, the transformer oil tank casing 5 is pulled out of the positioning inclined plate 18 to remove the transformer oil tank casing 5, and then a new transformer oil tank casing 5 is installed for welding.

[0035] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic welding device for producing transformer oil tanks, comprising a supporting and fixing device (1), a mechanical arm (2), a transformer oil tank shell (5) and a heat dissipation fin (6), characterized in that: The mechanical arm (2) is arranged on one side of the supporting and fixing device (1), and a welding gun is arranged on the mechanical arm (2). The supporting and fixing device (1) comprises a positioning and fixing mechanism (3), a fixing mechanism (4) and a bottom supporting frame (7). The positioning and fixing mechanism (3) and the fixing mechanism (4) are symmetrically arranged above the bottom supporting frame (7). One end of the top of the bottom supporting frame (7) is fixedly connected to a mounting bracket (8), and a servo motor (9) is fixedly installed on the top of the mounting bracket (8). The top of the mounting bracket (8) is rotatably connected to a connecting shaft plate (10) on a side close to the driving end of the servo motor (9), and the driving end of the servo motor (9) is fixedly mounted on the connecting shaft plate (10); The positioning and fixing mechanism (3) comprises a rotating plate (11), a first fixing bracket (12) is fixedly installed in the middle of one side of the rotating plate (11), a first fixing plate (13) is symmetrically fixedly installed on one side of the rotating plate (11) close to the first fixing bracket (12), a second fixing plate (14) is symmetrically fixedly installed on one side of the rotating plate (11) close to the first fixing bracket (12), two sliding brackets (17) are symmetrically provided on one side of the rotating plate (11) close to the first fixing bracket (12), one end of the sliding bracket (17) away from the rotating plate (11) is fixedly connected to a positioning inclined plate (18), and one end of the first fixing bracket (12) away from the rotating plate (11) is symmetrically and movably connected to two first sliding clamps (30); The fixing mechanism (4) comprises a support plate (34), the top end of the support plate (34) is movably connected to a sliding support plate (36), the upper portion of the support plate (34) is movably connected to a sliding bracket (37), the side of the sliding bracket (37) away from the sliding support plate (36) is rotatably connected to a second fixed bracket (41), and the inner side of the second fixed bracket (41) is symmetrically movably connected to two second sliding clamps (43).

2. The automatic welding device for producing transformer oil tanks according to claim 1, characterized in that: The first fixing plate (13) and the second fixing plate (14) are symmetrically distributed on both sides of the first fixing bracket (12); two first sliding rods (15) are symmetrically fixedly installed between the first fixing plate (13) and the second fixing plate (14) on the same side of the first fixing bracket (12); an energy storage spring (16) is nested on the first sliding rod (15); the sliding bracket (17) is slidably connected to the first sliding rod (15); the energy storage spring (16) is located between the sliding bracket (17) and the second fixing plate (14); a limiting sliding groove (2 5), a fixing portion (22) is fixedly installed on the middle part of one side of the rotating plate (11) close to the first fixing bracket (12), a limiting slot (23) is provided through the fixing portion (22), and a gear (24) is rotatably connected to the inner side of the limiting slot (23), and an extension rod (19) is fixedly connected to one end of the sliding bracket (17) close to the fixing portion (22), wherein the bottom end of one of the extension rods (19) close to one end of the fixing portion (22) is fixedly connected to a lower gear guide rail (21), and the top end of the other extension rod (19) close to one end of the fixing portion (22) is fixedly connected to an upper gear guide rail (20).

3. The automatic welding device for producing transformer oil tanks according to claim 2, characterized in that: The fixing portion (22) is located inside the first fixing bracket (12) close to one end of the rotating plate (11); the first fixing bracket (12) is evenly and symmetrically provided with a first sliding groove (29) at one end away from the rotating plate (11); the first sliding clamp (30) is slidably connected to the first fixing bracket (12) through the first sliding groove (29); a first bidirectional threaded rod (32) is rotatably installed inside the first fixing bracket (12); a first knob (33) is fixedly installed at the top end of the first bidirectional threaded rod (32); and a plug (31) is fixedly installed at the top and bottom ends of one end of the first fixing bracket (12) close to the first sliding groove (29).

4. The automatic welding device for producing transformer oil tanks according to claim 1, characterized in that: Two second slide bars (35) are symmetrically fixedly installed on the top of the support plate (34), and the sliding bracket (37) is slidably connected to the two second slide bars (35). A threaded rod (40) is threadedly connected to the sliding support plate (36), and one end of the threaded rod (40) close to the sliding bracket (37) is rotatably connected to the sliding bracket (37). Two second sliding grooves (38) are symmetrically opened at one end of the support plate (34) close to the sliding support plate (36), and the sliding support plate (36) is slidably connected to the support plate (34) through the second sliding grooves (38). The bottom end of the sliding support plate (36) is threadedly connected with a locking bolt (39), and the threaded end of the locking bolt (39) is in contact with the bottom end of the support plate (34). The second fixed bracket (41) is symmetrically provided with a third sliding groove (42) on the inner side of one end away from the sliding bracket (37). The two sides of the second sliding clamping plate (43) are respectively slidably connected to the inner sides of the two third sliding grooves (42). The second fixed bracket (41) is internally rotatably connected with a second bidirectional threaded rod (45), and the top end of the second bidirectional threaded rod (45) is fixedly installed with a second knob (46).

5. The automatic welding device for producing transformer oil tanks according to claim 4, characterized in that: The second sliding clamping plate (43) is fixedly connected to a clamping plate (44) at one end away from the second fixed bracket (41) and away from the middle of the second fixed bracket (41), and the threads at the two outer ends of the second bidirectional threaded rod (45) are symmetrically arranged, and the two second sliding clamping plates (43) are symmetrically threadedly connected to the two ends of the second bidirectional threaded rod (45).

6. The automatic welding device for producing transformer oil tanks according to claim 2, characterized in that: The upper gear guide rail (20) and the lower gear guide rail (21) are both movably inserted into the inner side of the limiting groove (23), the upper gear guide rail (20) is meshedly connected to the top end of the gear (24), the lower gear guide rail (21) is meshedly connected to the bottom end of the gear (24), and the extension rod (19) is slidably connected to the inner side of the limiting sliding groove (25).

7. The automatic welding device for producing transformer oil tanks according to claim 3, characterized in that: The two ends of the first bidirectional threaded rod (32) are respectively rotatably connected to the two plugs (31), the threads at the two outer ends of the first bidirectional threaded rod (32) are symmetrically arranged, the two first sliding clamps (30) are symmetrically threadedly connected to the two ends of the first bidirectional threaded rod (32), and the rotating plate (11) is fixedly mounted on the side of the connecting shaft plate (10) away from the servo motor (9).

8. The automatic welding device for producing transformer oil tanks according to claim 1, characterized in that: The support plate (34) is fixedly mounted on an end of the top end of the bottom support frame (7) away from the mounting bracket (8).

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