A nuclear power stainless steel flange forging clamp

Abstract

The application discloses a kind of nuclear power stainless steel flange forging clamps, belong to stainless steel flange forging technical field, the nuclear power stainless steel flange forging clamps, including support frame, the support frame top is fixedly connected with turnover assembly, for the cleaning of flange front and back, the turnover assembly inside is provided with clamping mechanism, for flange clamping rotation, cleaning mechanism is arranged between the support frame and turnover assembly, for the cleaning of different surface conditions of flange.The application is cleaned thoroughly by adopting cleaning mechanism and turnover assembly in a short period of time on the casting slag on the outer surface of flange, improve production efficiency, shorten process cycle, reduce downtime.

Description

Technical Field

[0001] This invention belongs to the field of stainless steel flange forging technology, and specifically relates to a forging fixture for stainless steel flanges used in nuclear power plants. Background Technology

[0002] Nuclear power plants have extremely stringent requirements for equipment, especially in terms of structure and materials. Stainless steel flanges are used in nuclear power systems, typically operating in high-pressure, high-temperature environments, particularly in reactor piping systems. Forging fixtures ensure the precision and strength of the flanges, preventing equipment failures or accidents caused by material defects or poor assembly. Using specialized forging fixtures ensures that stainless steel flanges maintain high precision during production, reducing errors and improving processing efficiency. Through precise forging processes, the surface quality and dimensional control of the flanges can be guaranteed, thereby improving assembly accuracy and product reliability.

[0003] After the stainless steel flanges for nuclear power plants are forged, the casting slag generated during the casting process needs to be cleaned manually. This means additional labor costs, and the amount of cleaning work will increase with the increase in casting volume, affecting the overall production efficiency. Moreover, cleaning casting slag usually takes a considerable amount of time, especially for complex-shaped workpieces like flanges, where the cleaning process is quite cumbersome. In addition, during mass production, manual cleaning will lead to reduced production efficiency and increased cycle time, thus affecting the overall production progress. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a stainless steel flange forging fixture for nuclear power plants.

[0005] The technical solution adopted to solve the above technical problems is: a forging fixture for stainless steel flanges for nuclear power plants, including a support frame, a flipping assembly fixedly connected to the top of the support frame for cleaning the front and back of the flange, a clamping mechanism inside the flipping assembly for clamping and rotating the flange, and a cleaning mechanism between the support frame and the flipping assembly for cleaning different surface conditions of the flange.

[0006] The above technical solutions not only improve cleaning efficiency and quality, but also enhance the mechanical strength, sealing performance, and corrosion resistance of the flanges. Automated cleaning can reduce human error and improve the operational stability and safety of the equipment.

[0007] Furthermore, the flipping assembly includes two first support plates and two second support plates fixedly connected to the support frame. The top of the first support plate is notched. A frame is movably connected to the notches at the top of the two first support plates. The connecting shafts on both sides of the frame are located at the notches at the top of the first support plates. Second rotating plates are rotatably connected to both sides of the frame. The other end of the second rotating plates is rotatably connected to the outer wall of the support frame. A handrail is rotatably connected between the two second support plates. One end of the handrail is rotatably connected to the connecting shaft of the frame located at the notch at the top of the first support plate. The clamping mechanism is located inside the frame.

[0008] Through the above technical solution, manual flipping allows workers to precisely control the flipping angle as needed, ensuring that the flange is accurately processed during the cleaning process on each side, guaranteeing the cleaning effect on both sides of the flange, improving cleaning accuracy, surface quality and production efficiency, while reducing equipment investment and operational risks.

[0009] Furthermore, the clamping mechanism includes two H-shaped slides that are slidably connected to the inner wall of the frame, and one of the H-shaped slides is T-shaped. The two ends of the H-shaped slide are rotatably connected to limit wheels. Several hydraulic rods are installed inside the frame, and the hydraulic rods are arranged in a mirror image of each other. The telescopic ends of two of the hydraulic rods are fixedly connected to the outer wall of the H-shaped slide. A first motor is installed inside the T-shaped H-shaped slide. The output end of the first motor is fixedly connected to a chain assembly, and the three sprockets in the chain assembly are arranged in a triangular structure. At the same time, the output end of the first motor is fixedly connected to one of the sprockets in the chain assembly, and the other two sprockets in the chain assembly are welded to the limit wheels.

[0010] Through the above technical solution, the removal speed of casting slag is faster than manual cleaning by using mechanized friction cleaning. The rotation process of the flange under the friction of the limiting wheel can complete the cleaning in a short time, reducing the labor intensity of manual labor, and avoiding the errors and omissions that may occur during manual cleaning.

[0011] Furthermore, the cleaning mechanism includes two mirror-shaped adjustment plates, with a movable frame rotatably connected to the top of the two adjustment plates. The two ends of the movable frame are slidably connected to the top of the support frame, and several steel brushes with linear and equal spacing are installed on the top of the movable frame. An arc-shaped groove is opened through one side of the middle of the adjustment plate, and a first rotating plate is arranged in the arc-shaped groove. At the same time, one end of the first rotating plate is located in the arc-shaped groove and is slidably connected to the adjustment plate, and the other end of the first rotating plate is rotatably connected to the inner wall of the support frame. The interior of the first rotating plate is hollow, and a sliding groove is opened through the side of the first rotating plate away from the arc-shaped groove.

[0012] The above technical solution, employing this adjustable cleaning mechanism, reduces reliance on manual operation and the risk of human error. The adjustable frequency design also allows the equipment to adapt to the cleaning needs of flanges of different sizes and shapes, thereby reducing the skill requirements for workers and minimizing human error.

[0013] Furthermore, a slider is provided in the groove, and the slider is slidably connected to the first rotating plate. At the same time, the two ends of the slider limit the first rotating plate. A threaded rod is threadedly connected through the middle of the slider, and the two ends of the threaded rod are rotatably connected to the support frame. A connecting plate is rotatably connected to the bottom end of the adjusting plate, and a circular plate is rotatably connected to the other end of the connecting plate. At the same time, the connecting plate and the circular plate are eccentrically connected and rotated. The circular plate is rotatably connected to the inner wall of the support frame.

[0014] The cleaning process is continuous and repetitive. By adjusting the frequency and amplitude of reciprocating motion, high-quality cleaning can be completed in a short time, thereby improving overall production efficiency.

[0015] Furthermore, a second synchronous belt assembly is provided at the bottom of the threaded rod. The two synchronous pulleys in the second synchronous belt assembly are rotatably connected to the support frame through the two pulleys. The synchronous pulley connecting shaft in the second synchronous belt assembly is fixedly connected to the threaded rod through the two pulleys. Meanwhile, a third motor is provided at the top of one of the threaded rods. The third motor is fixedly installed to the support frame. The output end of the third motor is rotatably connected to the support frame through the two motors. At the same time, the output end of the third motor is fixedly connected to the threaded rod.

[0016] The above technical solutions can not only clean the surface impurities of the flange, but also effectively eliminate minor surface defects or unevenness, thereby improving the processing accuracy of the flange. This has a significant impact on subsequent processing steps (such as welding, heat treatment, assembly, etc.) and ensures the smooth progress of subsequent processes.

[0017] Furthermore, a first synchronous belt assembly is rotatably connected to both sides of the support frame. The synchronous pulley in the first synchronous belt assembly is rotatably connected to the outer wall of the support frame, and one of the synchronous pulley connecting shafts in the first synchronous belt assembly is rotatably connected to the support frame through it. At the same time, the through end of one of the synchronous pulley connecting shafts in the first synchronous belt assembly is fixedly connected to a circular plate. A connecting rod is provided inside the support frame. Both ends of the connecting rod are rotatably connected to the support frame through it, and the through end of the connecting rod is fixedly connected to another synchronous pulley in the first synchronous belt assembly.

[0018] Furthermore, a second motor is installed on one side of the support frame, and the output end of the second motor is rotatably connected to the support frame. At the same time, a drive gear is fixedly connected to the through end of the second motor. A driven gear is driven to one side of the drive gear. The connecting rod is fixedly connected to the driven gear. An inclined sliding plate is fixedly connected inside the support frame.

[0019] The above technical solution can avoid problems such as omissions, repeated cleaning, or excessive local wear that may occur in traditional cleaning methods. During the cleaning process, the uniform force applied by the steel brush can reduce damage or excessive wear on the flange surface, thereby avoiding unnecessary defects and improving the overall quality of the flange.

[0020] The beneficial effects of the present invention are as follows: (1) The present invention drives the drive gear to rotate through the operation of the second motor, thereby driving the driven gear. Under the action of the connecting rod, the first synchronous belt assembly on both sides of the support frame is driven simultaneously, driving the circular plate inside the support frame to rotate. While the connecting plate revolves with the circular plate, the connecting plate and the circular plate rotate relative to each other, thereby driving the adjusting plate to swing cyclically with the first rotating plate located at the arc groove as the fulcrum. During the swinging process, the adjusting plate drives the moving frame to move back and forth in the linear direction of the support frame, thereby enabling the steel brush at the top of the moving frame to clean the casting slag on the rotating flange end face. It can quickly and efficiently clean both sides of the flange. Compared with traditional manual cleaning or fixed cleaning tools, the reciprocating motion can complete the cleaning work in a shorter time, improve production efficiency, shorten the process cycle, and reduce downtime.

[0021] (2) This invention lifts the frame and its internal components simultaneously by manually pressing the handrail. The frame and handrail rotate relative to each other, with the frame rotating away from the second rotating plate. At the same time, the second rotating plate rotates synchronously with the frame, moving away from the second rotating plate. After passing the first support plate, the handrail is lifted upwards, so that the frame is located on top of the first support plate, thereby achieving the purpose of flipping the frame. The manually operated flipping mechanism has a simple structure and low cost. For small-scale or medium-sized production lines, the use of a manual flipping mechanism can reduce additional equipment investment and save costs while ensuring the cleaning effect.

[0022] (3) The present invention drives the threaded rod to rotate by the operation of the third motor, thereby changing the positional relationship of the slider in the vertical direction of the threaded rod, so that the slider slides in the groove in the first rotating plate, and the first rotating plate and the support frame rotate relative to each other, causing the first rotating plate to move along the arc trajectory of the arc groove, and the first rotating plate and the adjustment plate slide relative to each other, thereby changing the position of the fulcrum of the first rotating plate and the adjustment plate, thereby changing the swing amplitude of the adjustment plate, causing the reciprocating frequency of the moving frame to change. By adjusting the frequency and reciprocating amplitude, uniform mechanical friction can be generated on the flange surface, effectively cleaning both sides of the flange. The cleaning parameters can be adjusted according to the different sizes, thicknesses and surface conditions of the flange, ensuring that the expected cleaning effect can be achieved for both small and large flanges. Attached Figure Description

[0023] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the second perspective structure of the present invention;

[0025] Figure 3 yes Figure 1 A magnified structural diagram at point A;

[0026] Figure 4 This is a schematic diagram of the connection between the second motor and the support frame of the present invention;

[0027] Figure 5 yes Figure 4 A magnified structural diagram at point B;

[0028] Figure 6 This is a schematic diagram of the connection between the first synchronous belt assembly and the support frame of the present invention;

[0029] Figure 7 yes Figure 6 A magnified structural diagram at point C;

[0030] Figure 8 This is a schematic diagram of the connection between the skateboard and the support frame of the present invention.

[0031] Reference numerals: 11. Support frame; 12. Frame; 13. H-shaped carriage; 14. Hydraulic rod; 15. Limiting wheel; 16. First motor; 17. Chain assembly; 18. Slide plate; 2. Cleaning mechanism; 21. Second motor; 22. Drive gear; 23. Driven gear; 24. Connecting rod; 25. First synchronous belt assembly; 26. Circular plate; 27. Connecting plate; 28. Adjusting plate; 29. ​​Arc groove; 210. First rotating plate; 211. Slide groove; 212. Threaded rod; 213. Slider; 214. Moving frame; 215. Second synchronous belt assembly; 216. Third motor; 217. Steel brush; 3. Flipping assembly; 31. Handrail; 32. Second rotating plate; 33. First support plate; 34. Second support plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] like Figures 1-3This embodiment of a forging fixture for nuclear power stainless steel flanges includes a support frame 11. A flipping assembly 3 is fixedly connected to the top of the support frame 11. The flipping assembly 3 includes two first support plates 33 and two second support plates 34 fixedly connected to the support frame 11. The top of the first support plates 33 is notched. A frame 12 is movably connected to the notches at the top of the two first support plates 33. The connecting shafts on both sides of the frame 12 are located at the notches at the top of the first support plates 33. Second rotating plates 32 are rotatably connected to both sides of the frame 12. The other end of the second rotating plates 32 is rotatably connected to the outer wall of the support frame 11. This not only improves cleaning efficiency and quality but also enhances the mechanical strength, sealing performance, and corrosion resistance of the flange. Automated cleaning can reduce human error and improve the operational stability and safety of the equipment. A handrail 31 is rotatably connected between the two second support plates 34. One end of the handrail 31 is rotatably connected to the connecting shaft of the frame 12 located at the notches at the top of the first support plates 33. The clamping mechanism is located inside the frame 12 and is used to clean the front and back of the flange.

[0034] like Figure 2 and Figure 3 As shown, the flange-flipping assembly 3 has a clamping mechanism inside for clamping and rotating the flange. The clamping mechanism includes two H-shaped slides 13 that are slidably connected to the inner wall of the frame 12, and one of the H-shaped slides 13 is T-shaped. Limiting wheels 15 are rotatably connected to both ends of the H-shaped slide 13. Several hydraulic rods 14 are installed inside the frame 12, and the hydraulic rods 14 are arranged in pairs in a mirror image. The telescopic ends of two hydraulic rods 14 are connected and fixed to the outer wall of the H-shaped slide 13. The T-shaped H-shaped slide 13 has a first motor 16 installed inside. Manual flange-flipping allows the operator to precisely control the flipping angle as needed, so that the flange can be precisely processed during the cleaning process on each side, ensuring the cleaning effect on both sides of the flange, improving cleaning accuracy, surface quality and production efficiency, while reducing equipment investment and operating costs. To mitigate risks, the output end of the first motor 16 is fixedly connected to a chain assembly 17, and the three sprockets within the chain assembly 17 are arranged in a triangular structure. Simultaneously, the output end of the first motor 16 is fixedly connected to one of the sprockets in the chain assembly 17, while the other two sprockets within the chain assembly 17 are welded to the limiting wheels 15. Through mechanized friction cleaning, the removal speed of casting slag is faster than manual cleaning. The flange's rotation under the friction of the limiting wheels 15 allows for cleaning to be completed in a shorter time, reducing manual labor intensity and avoiding errors and omissions that may occur during manual cleaning. The operation of the first motor 16 drives the chain assembly 17 to rotate the flange within the four limiting wheels 15. During this rotation, the casting slag on the flange's circumference is peeled off by the friction of the limiting wheels 15.

[0035] like Figures 1-5As shown, a cleaning mechanism 2 is provided between the support frame 11 and the flipping assembly 3 for cleaning different surface conditions of the flange. The cleaning mechanism 2 includes two mirror-shaped adjusting plates 28. The top ends of the two adjusting plates 28 are rotatably connected to a movable frame 214. The two ends of the movable frame 214 are slidably connected to the top of the support frame 11. Several steel brushes 217 arranged linearly and with equal intervals are installed on the top of the movable frame 214. An arc-shaped groove 29 is provided through one side of the middle of the adjusting plate 28. A first rotating plate 210 is provided in the arc-shaped groove 29. At the same time, one end of the first rotating plate 210 is located in the arc-shaped groove 29 and is slidably connected to the adjusting plate 28. The other end of the first rotating plate 210 is rotatably connected to the inner wall of the support frame 11. By adopting this adjustable cleaning mechanism 2, the dependence on manual operation is reduced, and the risk of human error is reduced. The adjustable frequency design allows the equipment to adapt to the cleaning needs of flanges of different sizes and shapes, thereby reducing the skill requirements for operators and minimizing human error. The first rotating plate 210 is hollow inside, and a sliding groove 211 is provided through the side of the first rotating plate 210 away from the arc groove 29. A slider 213 is installed in the sliding groove 211, and the slider 213 is slidably connected to the first rotating plate 210. At the same time, the two ends of the slider 213 limit the first rotating plate 210. A threaded rod 212 is threadedly connected through the middle of the slider 213. This not only cleans the surface impurities of the flange, but also... It can effectively eliminate minor defects or unevenness on the surface, thereby improving the processing accuracy of the flange. It has an important impact on subsequent processing steps of the flange (such as welding, heat treatment, assembly, etc.) and can ensure the smooth progress of subsequent processes. The bottom of the threaded rod 212 is provided with a second synchronous belt assembly 215. The two synchronous pulleys in the second synchronous belt assembly 215 are rotatably connected to the support frame 11 through the end, and the synchronous pulley connecting shaft in the second synchronous belt assembly 215 is fixedly connected to the threaded rod 212. At the same time, a third motor 216 is provided on the top of one of the threaded rods 212.

[0036] like Figures 1-8As shown, the third motor 216 is fixedly installed on the support frame 11, and the output end of the third motor 216 is rotatably connected to the support frame 11. Simultaneously, the output end of the third motor 216 is fixedly connected to the threaded rod 212, and both ends of the threaded rod 212 are rotatably connected to the support frame 11. A connecting plate 27 is rotatably connected to the bottom end of the adjusting plate 28, and a circular plate 26 is rotatably connected to the other end of the connecting plate 27. First synchronous belt assemblies 25 are rotatably connected to both sides of the support frame 11. Synchronous pulleys within the first synchronous belt assembly 25 are rotatably connected to the outer wall of the support frame 11, and one of the synchronous pulley connecting shafts within the first synchronous belt assembly 25 is rotatably connected to the support frame 11. The cleaning process is continuous and repetitive. By adjusting the frequency and reciprocating amplitude, high-quality cleaning can be completed in a short time, thereby improving overall production efficiency. Simultaneously, the end of one of the synchronous pulley connecting shafts within the first synchronous belt assembly 25 is fixedly connected to the circular plate 26. The support frame 11 is internally equipped with… A connecting rod 24 is connected to a second motor 21 mounted on one side of the support frame 11. The output end of the second motor 21 is rotatably connected to the support frame 11. At the same time, a drive gear 22 is fixedly connected to the end of the second motor 21. A driven gear 23 is driven to one side of the drive gear 22. The connecting rod 24 is fixedly connected to the driven gear 23. An inclined sliding plate 18 is fixedly connected inside the support frame 11. This can avoid problems such as omissions, repeated cleaning, or excessive local wear that may occur in traditional cleaning methods. During the cleaning process, the uniform force applied by the steel brush 217 can reduce damage or excessive wear on the flange surface, thereby avoiding unnecessary defects and improving the overall quality of the flange. The two ends of the connecting rod 24 are rotatably connected to the support frame 11. The end of the connecting rod 24 is fixedly connected to another synchronous pulley in the first synchronous belt assembly 25. At the same time, the connecting plate 27 is rotatably connected to the circular plate 26 at an eccentric position. The circular plate 26 is rotatably connected to the inner wall of the support frame 11.

[0037] The working principle of this embodiment is as follows: the forged flange is placed between two H-shaped slides 13, and then the hydraulic rods 14 on both sides move, causing the two H-shaped slides 13 to move in opposite directions, causing the four limit wheels 15 to clamp and limit the flange. Then the first motor 16 runs to drive the chain assembly 17 to transmit power, so that the limit wheels 15 welded to it rotate synchronously, thereby causing the flange to rotate within the four limit wheels 15.

[0038] Then, the second motor 21 drives the drive gear 22 to rotate, thereby transmitting power to the driven gear 23. Under the action of the connecting rod 24, the first synchronous belt assemblies 25 on both sides of the support frame 11 are simultaneously driven, causing the circular plate 26 inside the support frame 11 to rotate. While the connecting plate 27 revolves with the circular plate 26, the connecting plate 27 and the circular plate 26 rotate relative to each other, thereby causing the adjusting plate 28 to swing cyclically with the first rotating plate 210 located at the arc groove 29 as the fulcrum. During the swinging process, the adjusting plate 28 drives the moving frame 214 to reciprocate in the linear direction of the support frame 11, thereby causing the steel brush 217 on the top of the moving frame 214 to clean the casting slag on the rotating flange end face. The stripped casting slag falls onto the inclined surface of the sliding plate 18 under the action of gravity and slides out for collection and sorting.

[0039] After cleaning one end face of the flange, the worker can press the handrail 31 to lift the frame 12 and its internal components simultaneously. The frame 12 and the handrail 31 will rotate relative to each other, with the frame 12 rotating away from the second rotating plate 32. At the same time, the second rotating plate 32 will rotate synchronously with the frame 12 away from the second rotating plate 32. After passing the first support plate 33, the handrail 31 will be lifted upwards, so that the frame 12 is located on top of the first support plate 33, thereby achieving the purpose of flipping the frame 12 over, and then cleaning the other end face of the flange.

[0040] When faced with different conditions on the flange end face (such as oxide layer thickness, oil stains, etc.), the third motor 216 can be driven to rotate the threaded rod 212, thereby changing the positional relationship of the slider 213 in the vertical direction of the threaded rod 212. This causes the slider 213 to slide in the groove 211 within the first rotating plate 210, and the first rotating plate 210 and the support frame 11 rotate relative to each other, causing the first rotating plate 210 to move along the arc-shaped trajectory of the arc-shaped groove 29. The first rotating plate 210 and the adjusting plate 28 slide relative to each other, thereby changing the position of the fulcrum of the first rotating plate 210 and the adjusting plate 28. This changes the swing amplitude of the adjusting plate 28, causing the reciprocating frequency of the moving frame 214 to change, avoiding over-cleaning or under-cleaning, and ensuring the best cleaning effect.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A stainless steel flange forging fixture for nuclear power plants, comprising a support frame (11), characterized in that: The top of the support frame (11) is fixedly connected to a flipping assembly (3) for cleaning the front and back of the flange. The flipping assembly (3) is provided with a clamping mechanism for clamping and rotating the flange. A cleaning mechanism (2) is provided between the support frame (11) and the flipping assembly (3) for cleaning different surface conditions of the flange. The cleaning mechanism (2) includes two mirror-shaped adjustment plates (28). The top ends of the two adjustment plates (28) are rotatably connected to a movable frame (214). The two ends of the movable frame (214) are slidably connected to the top of the support frame (11). The top of the movable frame (214) is equipped with several steel brushes (217) arranged linearly with equal intervals. An arc-shaped groove (29) is opened through one side of the middle of the adjustment plate (28). A first rotating plate (210) is provided in the arc-shaped groove (29). At the same time, one end of the first rotating plate (210) is located in the arc-shaped groove (29) and is slidably connected to the adjustment plate (28). The other end of the first rotating plate (210) is rotatably connected to the inner wall of the support frame (11). The interior of the first rotating plate (210) is hollow. A sliding groove (211) is opened through the side of the first rotating plate (210) away from the arc-shaped groove (29). A slider (213) is provided in the groove (211), and the slider (213) is slidably connected to the first rotating plate (210). At the same time, the two ends of the slider (213) limit the first rotating plate (210). A threaded rod (212) is threaded through the middle of the slider (213), and the two ends of the threaded rod (212) are rotatably connected to the support frame (11). A connecting plate (27) is rotatably connected to the bottom end of the adjusting plate (28), and a circular plate (26) is rotatably connected to the other end of the connecting plate (27). At the same time, the connecting plate (27) and the circular plate (26) are eccentrically connected and rotated. The circular plate (26) is rotatably connected to the inner wall of the support frame (11). The bottom of the threaded rod (212) is provided with a second synchronous belt assembly (215). The two synchronous pulleys in the second synchronous belt assembly (215) are rotatably connected to the support frame (11) through the end. The synchronous pulley connecting shaft in the second synchronous belt assembly (215) is fixedly connected to the threaded rod (212). At the same time, a third motor (216) is provided at the top of one of the threaded rods (212). The third motor (216) is fixedly installed with the support frame (11). The output end of the third motor (216) is rotatably connected to the support frame (11) through the end. At the same time, the output end of the third motor (216) is fixedly connected to the threaded rod (212).

2. The forging fixture for a stainless steel flange for nuclear power plants according to claim 1, characterized in that, The flipping assembly (3) includes two first support plates (33) and two second support plates (34) fixedly connected to the support frame (11). The top of the first support plate (33) is notched. A frame (12) is movably connected to the notch at the top of the two first support plates (33). The connecting shafts on both sides of the frame (12) are located at the notch at the top of the first support plate (33). The two sides of the frame (12) are rotatably connected to second rotating plates (32). The other end of the second rotating plates (32) is rotatably connected to the outer wall of the support frame (11). A handrail (31) is rotatably connected between the two second support plates (34). One end of the handrail (31) is rotatably connected to the connecting shaft of the frame (12) located at the notch at the top of the first support plate (33). The clamping mechanism is located inside the frame (12).

3. A forging fixture for stainless steel flanges used in nuclear power plants according to claim 2, characterized in that, The clamping mechanism includes two H-shaped slides (13) that are slidably connected to the inner wall of the frame (12), and one of the H-shaped slides (13) is T-shaped. The two ends of the H-shaped slide (13) are rotatably connected to the limiting wheels (15). The frame (12) is equipped with several hydraulic rods (14), and the hydraulic rods (14) are mirror images of each other. The telescopic ends of the two hydraulic rods (14) are connected and fixed to the outer wall of the H-shaped slide (13). The T-shaped H-shaped slide (13) is equipped with a first motor (16). The output end of the first motor (16) is fixedly connected to a chain assembly (17), and the three sprockets in the chain assembly (17) are triangular. The output end of the first motor (16) is connected and fixed to one of the sprockets in the chain assembly (17). The other two sprockets in the chain assembly (17) are welded to the limiting wheels (15).

4. A forging fixture for stainless steel flanges for nuclear power plants according to claim 1, characterized in that, The support frame (11) is rotatably connected to the two sides of the first synchronous belt assembly (25). The synchronous pulley in the first synchronous belt assembly (25) is rotatably connected to the outer wall of the support frame (11). The connecting shaft of one of the synchronous pulleys in the first synchronous belt assembly (25) is rotatably connected to the support frame (11). At the same time, the connecting end of the connecting shaft of one of the synchronous pulleys in the first synchronous belt assembly (25) is fixedly connected to the circular plate (26). The support frame (11) is provided with a connecting rod (24). The two ends of the connecting rod (24) are rotatably connected to the support frame (11). The connecting end of the connecting rod (24) is fixedly connected to another synchronous pulley in the first synchronous belt assembly (25).

5. A forging fixture for a stainless steel flange for nuclear power plants according to claim 4, characterized in that, A second motor (21) is installed on one side of the support frame (11), and the output end of the second motor (21) is rotatably connected to the support frame (11). At the same time, a drive gear (22) is fixedly connected to the end of the second motor (21). A driven gear (23) is connected to one side of the drive gear (22). The connecting rod (24) is fixedly connected to the driven gear (23). An inclined sliding plate (18) is fixedly connected inside the support frame (11).

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