Hydraulic type welding supporting clamp

Abstract

The invention belongs to the technical field of supporting clamps, and particularly discloses a hydraulic type welding supporting clamp which comprises a base table, a placing groove is formed in the middle end of the top of the base table, a workbench is movably arranged in the placing groove, an inner cavity groove is formed under the placing groove, and a driving air cylinder is arranged in the inner cavity groove. A first clamping mechanism is arranged on the surface of the workbench, supporting frames are fixedly installed at the positions, on the two sides of the containing groove, of the top of the base table, second clamping mechanisms are arranged on the surfaces, close to the bottom ends, of the supporting frames, and third hydraulic mechanisms are installed at the top ends of the supporting frames. Through mutual cooperation of the first clamping mechanism, the second clamping mechanism and the third hydraulic mechanism, a tank body can be vertically installed in the device, welding work on the top of the tank body is facilitated, the device can position and clamp the tank body from different directions, it is ensured that the position of the tank body is accurate during welding, shaking or displacement is avoided, and the welding efficiency is improved. And the welding quality is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of support jigs, and specifically discloses a hydraulic welding support jig. Background Art

[0002] Welding generally refers to the welding of metals, which is a forming method that connects two separate objects into one by heating or pressurizing, or both simultaneously, to generate an atomic bonding force between them. A hydraulic welding support jig is a welding jig that uses a hydraulic system for clamping and releasing, mainly used to fix workpieces during the welding process to ensure welding accuracy and stability. During the processing of a tank body, in order to ensure the sealing performance and structural strength of the tank body, the top of the tank body needs to be welded.

[0003] Most of the existing tank welding operations adopt the method of laying the tank body flat and positioning it with a hydraulic support jig. However, this welding method has obvious defects: on the one hand, a large amount of heat generated during the welding process will cause the tank body to be extremely prone to deformation; on the other hand, the stress distribution of each part of the tank body will change when it is laid flat, thus causing local stress concentration problems. When welding the tank body vertically, due to the high center of gravity of the tank body, it is difficult for the existing hydraulic welding support jig to stably support the tank body, and the stability is poor. During the welding operation, even a slight vibration or external interference may cause the tank body to shake or displace, which not only seriously affects the welding accuracy and quality, but may even lead to safety accidents. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose a hydraulic welding support jig to solve the problems of the existing technology that most tank welding operations adopt the method of laying the tank body flat and positioning it with a hydraulic support jig, but this welding method has obvious defects: on the one hand, a large amount of heat generated during the welding process will cause the tank body to be extremely prone to deformation; on the other hand, the stress distribution of each part of the tank body will change when it is laid flat, thus causing local stress concentration problems. When welding the tank body vertically, due to the high center of gravity of the tank body, it is difficult for the existing hydraulic welding support jig to stably support the tank body, and the stability is poor. During the welding operation, even a slight vibration or external interference may cause the tank body to shake or displace, which not only seriously affects the welding accuracy and quality, but may even lead to safety accidents.

[0005] To achieve the above object, the present invention provides a hydraulic welding support fixture, including a base table. An installation groove is formed in the middle of the top of the base table. A workbench is movably arranged inside the installation groove. An inner cavity groove is formed directly below the installation groove. A driving cylinder is arranged inside the inner cavity groove. The output end of the driving cylinder is connected to the workbench. A first clamping mechanism is arranged on the surface of the workbench. Support frames are fixedly installed on both sides of the base table and at the positions of the installation groove. A second clamping mechanism is arranged on the surface of the support frame near the bottom end. A third hydraulic mechanism is installed at the top end of the support frame. The first clamping mechanism, the second clamping mechanism and the third hydraulic mechanism cooperate with each other to position the tank body.

[0006] In the above technical solution, preferably, path grooves are formed at the four corners of the workbench. The first clamping mechanism includes four sliding columns. The four sliding columns are respectively slidably installed in the four path grooves. A clamping cylinder is sleeved and installed at the top of the sliding column through a bolt. The clamping cylinder is movably located on the upper surface of the workbench. First positioning frames are installed at the four corners of the bottom of the driving cylinder. A second positioning frame is fixedly installed at the bottom of the sliding column. The second positioning frame is movably located on the lower surface of the workbench. A first connecting rod is installed between the first positioning frame and the second positioning frame through a rotating shaft.

[0007] In the above technical solution, preferably, a side groove is formed on the surface of the support frame near the bottom end. A plug-in groove is formed in the middle of the inner part of the side groove. The plug-in groove penetrates through the support frame. The second clamping mechanism includes a plug-in strip. The plug-in strip is movably inserted into the plug-in groove. Gears are rotatably installed on both sides of the plug-in groove inside the side groove. Rack teeth are arranged on the end face of the plug-in strip. The rack teeth at both ends of the plug-in strip are respectively meshed with the two gears. A fixing plate is fixedly installed on the surface of the gear. An arc-shaped strip is installed at the other end of the fixing plate.

[0008] In the above technical solution, preferably, a long strip is fixedly installed at one end of the arc-shaped strip close to the fixing plate. The long strip is fixedly installed at the end of the fixing plate through a bolt.

[0009] In the above technical solution, preferably, through grooves are formed on both sides of the installation groove. The through grooves penetrate through the base table. Side plates are fixedly installed on both sides of the workbench. The side plates are movably installed in the through grooves. A third positioning frame is fixedly installed at the end of the side plate. A second connecting rod is installed inside the third positioning frame through a rotating shaft. A fourth positioning groove is formed at the top of the second connecting rod. A round hole is formed at one end of the plug-in strip away from the middle of the device. The fourth positioning groove is sleeved on the surface of the plug-in strip. A cylindrical strip is arranged inside the fourth positioning groove. The surface of the cylindrical strip movably penetrates through the round hole.

[0010] In the above technical solution, preferably, a guide post is arranged inside the through groove, and the guide post movably penetrates through the side plate.

[0011] In the above technical solution, preferably, a fitting groove is formed on the surface of the support frame near the top. The third hydraulic mechanism includes a synchronization mechanism, and the synchronization mechanism is installed in the fitting groove. A cross bar is installed between the synchronous belts of the two synchronization mechanisms. A stepping motor is installed on the top of the cross bar. A positioning disk is arranged below the cross bar. The output end of the stepping motor is connected to the positioning disk, and a pressing disk is installed at the bottom of the positioning disk through bolts.

[0012] In the above technical solution, preferably, a circular groove is arranged at the center of the top of the workbench, and a rotating disk is rotatably installed inside the circular groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] It is easier for workers to observe the welding condition of the tank body. When welding the top of the tank body, the molten metal flows downward under the influence of gravity, which helps to reduce defects such as pores and slag inclusions. At the same time, the gravity distribution of the tank body is more uniform, and the deformation caused by welding heat is relatively small; when the weld cools, the stress distribution is more uniform, reducing the risk of deformation of the tank body.

[0015] During the operation of the hydraulic welding support fixture, the first clamping mechanism, the second clamping mechanism and the third hydraulic mechanism cooperate closely. When the driving cylinder is started and drives the workbench to move upward, under the action of the first positioning frame, the second positioning frame and the first connecting rod, the sliding column gradually slides from the path groove at the end corner of the workbench towards the middle of the workbench, and the connected clamping cylinder also moves synchronously, so as to realize the clamping operation on the bottom of the tank body;

[0016] At the same time, the side plate and the insertion strip are connected to each other through the second connecting rod, which enables the second clamping mechanism to cooperate with the first clamping mechanism. During the upward movement of the workbench, the insertion strip will move towards the middle of the device. Since the end face of the insertion strip is provided with a rack and meshes with the gears on both sides in the side groove, its linear motion is converted into the circular motion of the gears. The rotation of the gears drives the fixed surface of the fixing plate to rotate together, and then the arc-shaped strips installed at the other end of the fixing plate rotate towards the direction close to the tank body. Finally, the arc-shaped strips on both sides approach and tightly clamp the tank body from both sides of the tank body;

[0017] Finally, the synchronous belt of the synchronization mechanism runs, driving the cross bar to move downward inside the two support frames. The stepping motor installed on the top of the cross bar, the positioning disk below the cross bar, and the pressing disk connected to the positioning disk will also move downward synchronously until the pressing disk contacts and applies pressure to the top of the tank body, completing the hydraulic clamping operation on the top of the tank body, achieving all-round and stable positioning and clamping of the tank body, and providing a strong guarantee for the smooth progress of the welding work. Brief Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a schematic diagram of the top structure of the support frame of the present invention;

[0020] Figure 3 is a schematic diagram of the base table structure of the present invention;

[0021] Figure 4 is a schematic diagram of the internal structure of the base table of the present invention;

[0022] Figure 5 is a schematic diagram of the structure of the first clamping mechanism and the second clamping mechanism of the present invention;

[0023] Figure 6 For the present invention Figure 4 is an enlarged view of part A in;

[0024] Figure 7 For the present invention Figure 5 is an enlarged view of part B in.

[0025] In the figure: 1. Base table; 2. Support frame; 3. Placement groove; 4. Through groove; 5. Inner cavity groove; 6. Workbench; 7. Side plate; 8. Driving cylinder; 9. First clamping mechanism; 10. Second clamping mechanism; 11. First positioning frame; 12. First connecting rod; 13. Path groove; 14. Sliding column; 15. Second positioning frame; 16. Clamping cylinder; 17. Side groove; 18. Insertion groove; 19. Gear; 20. Fixed plate; 21. Arc-shaped strip; 22. Long strip; 23. Insertion strip; 24. Round hole; 25. Third positioning frame; 26. Second connecting rod; 27. Fourth positioning groove; 28. Guide post; 29. Rotating disk; 30. Matching groove; 31. Synchronization mechanism; 32. Cross bar; 33. Stepping motor; 34. Positioning disk; 35. Pressing disk. Detailed Embodiment

[0026] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the limitations of the specific embodiments disclosed below.

[0028] As Figures 1-7 shown, a hydraulic welding support fixture includes a base table 1. A placement groove 3 is provided in the middle of the top of the base table 1. A workbench 6 is movably arranged inside the placement groove 3. An inner cavity groove 5 is provided directly below the placement groove 3. A driving cylinder 8 is arranged inside the inner cavity groove 5. The output end of the driving cylinder 8 is connected to the workbench 6. A first clamping mechanism 9 is arranged on the surface of the workbench 6. Support frames 2 are fixedly installed on both sides of the top of the base table 1 and at the positions of the placement groove 3. A second clamping mechanism 10 is arranged on the surface of the support frames 2 near the bottom ends. A third hydraulic mechanism is installed at the top ends of the support frames 2. The first clamping mechanism 9, the second clamping mechanism 10 and the third hydraulic mechanism cooperate with each other to position the tank body. Through the cooperation of the first clamping mechanism 9, the second clamping mechanism 10 and the third hydraulic mechanism, the tank body can be erected and installed in the device, which is convenient for the welding work at the top of the tank body. And the device can position and clamp the tank body from different directions, ensuring the accurate position of the tank body during welding, avoiding shaking or displacement, and thus guaranteeing the welding quality.

[0029] Path grooves 13 are provided at the four corner ends of the workbench 6. The first clamping mechanism 9 includes four sliding columns 14. The four sliding columns 14 are respectively slidably installed in the four path grooves 13. The top of the sliding column 14 is sleeved and installed with a clamping cylinder 16 through bolts. The clamping cylinder 16 is movably located on the upper surface of the workbench 6. First positioning frames 11 are installed at the four corner ends of the bottom of the driving cylinder 8. The bottom of the sliding column 14 is fixedly installed with a second positioning frame 15. The second positioning frame 15 is movably located on the lower surface of the workbench 6. A first connecting rod 12 is installed between the first positioning frame 11 and the second positioning frame 15 through a rotating shaft. The four sliding columns 14 slide in the four path grooves 13 respectively. The path grooves 13 provide accurate sliding guidance for the sliding columns 14, ensuring that the sliding columns 14 can only slide along a specific path, improving the stability and accuracy of the movement of the first clamping mechanism 9, and guaranteeing the reliable execution of the clamping action. By connecting the first positioning frame 11 and the second positioning frame 15 through the first connecting rod 12, when the driving cylinder 8 drives the workbench 6 to move upward, under the action of the first positioning frame 11, the second positioning frame 15 and the first connecting rod 12, the sliding columns 14 gradually move towards the middle of the workbench 6 along the path grooves 13, so that the clamping cylinder 16 realizes the clamping operation on the bottom of the tank body. The top of the sliding column 14 is sleeved and installed with a clamping cylinder 16 through bolts. This connection method is convenient for the installation and disassembly of the clamping cylinder 16 and facilitates the replacement of the clamping cylinder 16 by the staff.

[0030] On the surface of the support frame 2 near the bottom end, a side groove 17 is provided. In the middle of the inner part of the side groove 17, a plug-in groove 18 is provided. The plug-in groove 18 penetrates through the support frame 2. The second clamping mechanism 10 includes a plug-in strip 23. The plug-in strip 23 is movably plugged in the plug-in groove 18. Inside the side groove 17 and on both sides of the plug-in groove 18, gears 19 are rotatably installed. On the end face of the plug-in strip 23, racks are provided. The racks at both ends of the plug-in strip 23 are respectively engaged with the two gears 19. On the surface of the gear 19, a fixing plate 20 is fixedly installed. At the other end of the fixing plate 20, an arc-shaped strip 21 is installed. When the plug-in strip 23 moves towards the middle of the device, since the racks at both ends are respectively engaged with the two gears 19, the linear motion of the plug-in strip 23 will be converted into the circular motion of the gears 19. On the surface of each gear 19, a fixing plate 20 is fixedly installed. As the gear 19 rotates, the fixing plate 20 also rotates. Since an arc-shaped strip 21 is installed at the other end of the fixing plate 20, the arc-shaped strip 21 will move towards the workpiece as the fixing plate 20 rotates. Finally, the two arc-shaped strips 21 approach and tightly clamp the tank body from both sides, thus realizing the clamping function of the workpiece. This device uses the cooperation of the gear 19 and the rack to achieve power transmission. The racks at both ends of the plug-in strip 23 correspond to the gears 19 on both sides inside the side groove 17. When the plug-in strip 23 moves in the plug-in groove 18, it can smoothly drive the gear 19 to rotate. This transmission method has a high precision and can accurately convert the linear motion of the plug-in strip 23 into the circular motion of the gear 19, ensuring the stability and accuracy of power transmission.

[0031] At the end of the arc-shaped strip 21 close to the fixing plate 20, a long strip 22 is fixedly installed. The long strip 22 is fixedly installed at the end of the fixing plate 20 through bolts. At one end of the arc-shaped strip 21 close to the tank body, a plurality of grooves are provided, and balls are installed inside the grooves. The long strip 22 is fixedly installed at the end of the fixing plate 20 through bolts. This connection method enables the arc-shaped strip 21 to be firmly connected to the fixing plate 20. When the fixing plate 20 swings as the gear 19 rotates, it can reliably drive the arc-shaped strip 21 to move together to realize the clamping action on the tank body. At one end of the arc-shaped strip 21 close to the tank body, a plurality of grooves with balls are provided. When clamping the tank body, the balls contact the surface of the tank body. When the tank body rotates, the balls can roll in the grooves, reducing the friction between the arc-shaped strip 21 and the surface of the tank body, avoiding damage to the surface of the tank body due to excessive friction, and at the same time enabling the tank body to maintain a good clamping state.

[0032] On both sides of the placement groove 3, there are through grooves 4 which penetrate through the base table 1. On both sides of the workbench 6, there are side plates 7 fixedly installed. The side plates 7 are movably installed in the through grooves 4. The matching design of the through grooves 4 and the side plates 7 enables the workbench 6 to be stably movably installed on the base table 1, restricts the shaking of the workbench 6 in the horizontal direction, enhances the structural stability of the entire device, ensures that the workbench 6 does not displace during the processing, improves the processing accuracy. At the end of the side plate 7, there is a third positioning frame 25 fixedly installed. Inside the third positioning frame 25, a second connecting rod 26 is installed through a rotating shaft. At the top of the second connecting rod 26, there is a fourth positioning groove 27. At the end of the inserting strip 23 away from the middle of the device, there is a round hole 24. The fourth positioning groove 27 is sleeved on the surface of the inserting strip 23, and inside the fourth positioning groove 27, there is a cylindrical strip. The surface of the cylindrical strip movably penetrates through the round hole 24. The side plate 7 is connected to the inserting strip 23 through the second connecting rod 26. When the side plate 7 moves in the through groove 4, it can drive the inserting strip 23 to move through the second connecting rod 26, and then drive the second clamping mechanism 10 to work. This design realizes the coordination between the movement of the workbench 6 and the action of the second clamping mechanism 10, so that while adjusting the position of the workbench 6, the workpiece can be automatically clamped or loosened, improving the work efficiency. The movement of the third positioning frame 25 drives the second connecting rod 26 to move through the rotating shaft. Since there is a fourth positioning groove 27 at the top of the second connecting rod 26 and it is sleeved on the surface of the inserting strip 23, and the cylindrical strip in the fourth positioning groove 27 penetrates through the round hole 24 of the inserting strip 23, the movement of the second connecting rod 26 can be transmitted to the inserting strip 23. Driven by the second connecting rod 26, the inserting strip 23 makes corresponding movements in the inserting groove 18. The movement of the inserting strip 23 drives the gear 19 to rotate through the meshing of the rack and the gear 19, and then makes the fixing plate 20 and the arc-shaped strip 21 perform clamping or loosening actions to realize the clamping or loosening operation of the workpiece.

[0033] Inside the through groove 4, there is a guiding column 28. The guiding column 28 movably penetrates through the side plate 7. The guiding column 28 penetrates through the side plate 7, providing an accurate guiding path for the sliding of the side plate 7 in the through groove 4, ensuring the straightness and stability of the workbench 6 during the movement, avoiding the phenomena of deviation, shaking or jamming when the side plate 7 slides in the through groove 4, and improving the processing accuracy and reliability of the equipment.

[0034] The surface of the support frame 2 near the top is provided with a mating groove 30. The third hydraulic mechanism includes a synchronization mechanism 31. The synchronization mechanism 31 is installed in the mating groove 30. A cross bar 32 is installed between the synchronous belts of the two synchronization mechanisms 31. A stepping motor 33 is installed at the top of the cross bar 32. A positioning disk 34 is arranged below the cross bar 32. The output end of the stepping motor 33 is connected to the positioning disk 34. A pressing disk 35 is installed at the bottom of the positioning disk 34 through bolts. The setting of the two synchronization mechanisms 31 ensures the synchronization of the cross bar 32 during movement. The synchronous belt drive can accurately transmit power, enabling the cross bar 32 to move synchronously on both sides, ensuring that the stepping motor 33, the positioning disk 34, and the pressing disk 35 can maintain horizontal and move down or up synchronously, etc. Furthermore, the pressing disk 35 can press the top of the tank body to achieve the hydraulic clamping operation on the top of the tank body. At the same time, the stepping motor 33 can drive the positioning disk 34 and the pressing disk 35 to rotate. Since the surface of the pressing disk 35 presses the top of the tank body, the tank body can be driven to rotate.

[0035] A circular groove is provided at the center of the top of the workbench 6. A rotating disk 29 is rotatably installed inside the circular groove. The rotating disk 29 can cooperate with the third hydraulic mechanism to drive the tank body to rotate.

[0036] Working principle: First, the staff places the tank body to be processed on the surface of the workbench 6. Then, when the driving cylinder 8 drives the workbench 6 to move upward, under the action of the first positioning frame 11, the second positioning frame 15, and the first connecting rod 12, the sliding column 14 gradually moves towards the middle of the workbench 6 along the path groove 13, enabling the clamping cylinder 16 to clamp the bottom of the tank body. The side plate 7 is connected to the insertion bar 23 through the second connecting rod 26. When the side plate 7 moves in the through groove 4, it can drive the insertion bar 23 to move through the second connecting rod 26, thereby driving the second clamping mechanism 10 to work. The movement of the third positioning frame 25 drives the second connecting rod 26 to move through the rotating shaft. Since a fourth positioning groove 27 is provided at the top of the second connecting rod 26 and is sleeved on the surface of the insertion bar 23, and the cylindrical bar in the fourth positioning groove 27 penetrates the circular hole 24 of the insertion bar 23, the movement of the second connecting rod 26 can be transmitted to the insertion bar 23. Driven by the second connecting rod 26, the insertion bar 23 moves correspondingly in the insertion groove 18. The movement of the insertion bar 23 drives the gear 19 to rotate through the meshing of the rack and the gear 19. As the gear 19 rotates, the fixed plate 20 also rotates. Since an arc-shaped bar 21 is installed at the other end of the fixed plate 20, the arc-shaped bar 21 will move towards the workpiece as the fixed plate 20 rotates. Finally, the two arc-shaped bars 21 approach and tightly clamp the tank body from both sides, thus realizing the clamping function of the workpiece. Next, the synchronous belt drives the cross bar 32 to move downward inside the two support frames 2, and the stepping motor 33, the positioning disk 34, and the pressing disk 35 will also move downward synchronously. Finally, the pressing disk 35 can press the top of the tank body to achieve the hydraulic clamping operation on the top of the tank body.

[0037] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A hydraulic welding support fixture, comprising a base platform (1), characterized in that: A placement groove (3) is provided at the middle end of the top of the base platform (1), a workbench (6) is movably provided inside the placement groove (3), an inner cavity groove (5) is provided directly below the placement groove (3), a driving cylinder (8) is provided inside the inner cavity groove (5), an output end of the driving cylinder (8) is connected to the workbench (6), a first clamping mechanism (9) is provided on the surface of the workbench (6), a support frame (2) is fixedly installed on the top of the base platform (1) and on both sides of the placement groove (3), a second clamping mechanism (10) is provided on the surface of the support frame (2) close to the bottom end, a third hydraulic mechanism is installed on the top of the support frame (2), and the first clamping mechanism (9), the second clamping mechanism (10) and the third hydraulic mechanism cooperate with each other to position the tank body.

2. A hydraulic welding support fixture according to claim 1, characterized in that: The four end corners of the workbench (6) are each provided with a path groove (13); the first clamping mechanism (9) comprises four sliding columns (14); the four sliding columns (14) are respectively slidably installed in the four path grooves (13); a clamping cylinder (16) is installed on the top of the sliding column (14) through a bolt sleeve connection; the clamping cylinder (16) is movably located on the upper surface of the workbench (6); the four end corners of the bottom of the driving cylinder (8) are each provided with a first positioning frame (11); the bottom of the sliding column (14) is fixedly provided with a second positioning frame (15); the second positioning frame (15) is movably located on the lower surface of the workbench (6); a first connecting rod (12) is installed between the first positioning frame (11) and the second positioning frame (15) through a rotating shaft.

3. A hydraulic welding support fixture according to claim 2, characterized in that: The support frame (2) is provided with a side groove (17) on the surface close to the bottom end, and a plug-in groove (18) is provided at the middle end inside the side groove (17), and the plug-in groove (18) passes through the support frame (2). The second clamping mechanism (10) comprises a plug-in bar (23), and the plug-in bar (23) is movably plugged into the plug-in groove (18). Gears (19) are rotatably installed inside the side groove (17) and on both sides of the plug-in groove (18). Racks are provided on the end surface of the plug-in bar (23), and the racks at both ends of the plug-in bar (23) are respectively meshed with the two gears (19). A fixing plate (20) is fixedly installed on the surface of the gear (19), and an arc-shaped bar (21) is installed on the other end of the fixing plate (20).

4. A hydraulic welding support fixture according to claim 3, characterized in that: A long strip (22) is fixedly mounted on one end of the arc strip (21) close to the fixing plate (20), and the long strip (22) is fixedly mounted on the end of the fixing plate (20) by means of bolts.

5. The hydraulic welding support fixture according to claim 3, characterized in that: Through grooves (4) are provided on both sides of the placement groove (3), and the through grooves (4) penetrate the base platform (1). Side panels (7) are fixedly installed on both sides of the workbench (6), and the side panels (7) are movably installed in the through grooves (4). A third positioning frame (25) is fixedly installed at the end of the side panel (7), and a second connecting rod (26) is installed inside the third positioning frame (25) through a rotating shaft. A fourth positioning groove (27) is provided on the top of the second connecting rod (26). A circular hole (24) is provided at one end of the plug-in strip (23) away from the middle of the device, and the fourth positioning groove (27) is sleeved on the surface of the plug-in strip (23), and a cylindrical strip is provided inside the fourth positioning groove (27), and the surface of the cylindrical strip movably penetrates the circular hole (24).

6. The hydraulic welding support fixture according to claim 5, characterized in that: A guide column (28) is arranged inside the through slot (4), and the guide column (28) movably passes through the side plate (7).

7. The hydraulic welding support fixture according to claim 5, characterized in that: A matching groove (30) is provided on the surface of the support frame (2) near the top end, and the third hydraulic mechanism includes a synchronous mechanism (31), the synchronous mechanism (31) is installed in the matching groove (30), a cross bar (32) is installed between the synchronous belts of the two synchronous mechanisms (31), a stepper motor (33) is installed on the top of the cross bar (32), a positioning plate (34) is arranged below the cross bar (32), the output end of the stepper motor (33) is connected to the positioning plate (34), and a clamping plate (35) is installed at the bottom of the positioning plate (34) by bolts.

8. The hydraulic welding support fixture according to claim 1, characterized in that: A circular groove is arranged at the center of the top of the workbench (6), and a rotating disk (29) is rotatably mounted inside the circular groove.

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