Rotary swaging device for local plastic deformation of special-shaped ring forge piece and working method of rotary swaging device

Abstract

The rotary swaging device comprises a base and a stand column, the stand column is installed in the middle of the base, a supporting ring is installed on the stand column in a lifting mode, an inner ring base matched with the interior of the special-shaped ring forging is detachably installed on the supporting ring, and the inner ring base is provided with an outer ring matched with the interior of the special-shaped ring forging. A rotating ring is rotationally installed on the base, a lifting ring is installed on the rotating ring in a lifting mode, and a sliding arm is installed on the lifting ring in a sliding mode; self-adaptive precise forming of the complex special-shaped ring forge piece is achieved, the device can sense the deviation between the machining state and the target state in real time through the technology of integrating online three-dimensional scanning and digital twinning model comparison, a compensation strategy is automatically generated, a multi-axis actuator is driven to conduct collaborative correction, and the machining precision of the special-shaped ring forge piece is improved. And traditional'trial and error 'processing depending on artificial experience is converted into'intelligent' forming based on data, so that the one-time forming precision and the percent of pass are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal plastic forming, in particular to a swaging device for local plastic deformation of a special-shaped ring forging and a working method thereof. BACKGROUND

[0002] The special-shaped ring forging is difficult to be formed with high precision by traditional integral forging or ordinary spinning process due to its complex inner and outer profiles, asymmetric structure or local features.

[0003] In the prior art, local shaping of such special-shaped ring forgings is mostly achieved by manual hammering, machining after local repair welding or multiple heating-forging cycles, which has problems of low machining precision, poor efficiency, cut-off material streamline, uneven structure performance and easy introduction of residual stress; at present, there is a lack of an integrated device capable of online detection, intelligent decision and local precise swaging correction of the formed or semi-finished special-shaped ring forgings, which is difficult to meet the increasingly strict shape-property integrated manufacturing requirements of high-end equipment for complex ring pieces. SUMMARY

[0004] The present application solves the problem of providing a swaging device for local plastic deformation of a special-shaped ring forging and a working method thereof to solve the problems of low local shaping precision, poor efficiency, dependence on manual experience and difficulty in realizing closed-loop control of the special-shaped ring forgings in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: A swaging device for local plastic deformation of a special-shaped ring forging, comprising a base and a stand, a stand is installed in the middle of the base, a support ring is installed on the stand in a lifting manner, an inner ring seat adapted to the inside of the special-shaped ring forging is detachably installed on the support ring, a rotating ring is rotatably installed on the base, a lifting ring is installed on the rotating ring in a lifting manner, a sliding arm is slidably installed on the lifting ring, a C-shaped tooth ring with an opening facing the stand is installed on the sliding arm, a sliding carriage is slidably installed on the C-shaped tooth ring, a first hydraulic cylinder is installed on the sliding carriage, a mounting seat is installed at the extension end of the first hydraulic cylinder, a swaging head is installed on the mounting seat, and a scanner is installed on the sliding carriage.

[0006] Preferably, a second hydraulic cylinder is installed inside the base, and a lifting disc is installed at the extension end of the second hydraulic cylinder inside the hollow stand, a plurality of side grooves are formed on the outer side of the stand, a plurality of connecting arms are installed on the outer side of the lifting disc, and the connecting arms pass through the side grooves and are connected with the support ring.

[0007] Preferably, a disc seat is installed on the support ring, a third hydraulic cylinder is symmetrically installed on the disc seat, and the extension end of the third hydraulic cylinder is connected with the lifting disc.

[0008] Preferably, a plurality of groups of slide rails are arranged equiangularly around the bottom side of the lifting disc, a plurality of slide grooves parallel to the slide rails are formed in the bottom side of the lifting disc, a sliding block is slidably mounted on the slide rail, and a limiting rod retractable in the side groove is mounted on the sliding block.

[0009] Preferably, a first motor is mounted in the middle of the bottom side of the lifting disc, a rotating disc is mounted at the output end of the first motor in the lifting disc, a plurality of arc-shaped grooves are equiangularly formed in the rotating disc, and a guide rod penetrating through the slide groove and the arc-shaped groove is mounted on the sliding block.

[0010] Preferably, the base and the rotating ring are connected through a bearing, an outer gear is arranged on the outer side of the base, a second motor is mounted on the rotating ring, and a first rotating gear meshing with the outer gear is mounted at the output end of the second motor.

[0011] Preferably, a plurality of fourth hydraulic cylinders are mounted on the bottom side of the rotating ring, and the retractable ends of the fourth hydraulic cylinders are connected with the lifting ring.

[0012] Preferably, a guide rail slidably connected with the sliding arm is mounted on the lifting ring, a fifth hydraulic cylinder is mounted on the lifting ring, and the retractable end of the fifth hydraulic cylinder is connected with the sliding arm.

[0013] Preferably, C-shaped rails are symmetrically arranged on the side wall of the C-shaped tooth ring, and a sliding frame is slidably mounted with the C-shaped rails, a third motor is mounted on the sliding frame, a second rotating gear is mounted at the output end of the third motor, and the second rotating gear meshes with the C-shaped tooth ring.

[0014] A working method of a swaging device for local plastic deformation of a special-shaped ring forge piece, and the specific operation steps of the working method are as follows: Step one: the second hydraulic cylinder drives the lifting disc to lift, thereby driving the support ring to lift, an inner ring seat adapted to the inner wall of the special-shaped ring forge piece is arranged on the support ring, the special-shaped ring forge piece is sleeved on the support ring, the rotating disc is driven to rotate by the first motor, the arc-shaped grooves on the rotating disc cooperate with the guide rods fixed on the sliding blocks, the design of the arc-shaped grooves converts the rotating motion of the rotating disc into the synchronous radial linear motion of the sliding blocks along the slide rails, all the sliding blocks move radially synchronously, the limiting rods retract in the side grooves of the vertical columns during the loading and unloading of the special-shaped ring forge piece, the limiting rods extend out of the side grooves when the special-shaped ring forge piece is fixed and positioned, the third hydraulic cylinder is retracted to realize the downward movement of the disc seat and the limiting rods, the limiting rods contact the top side of the special-shaped ring forge piece to realize the center positioning and fixing of the special-shaped ring forge piece. Step 2: The fourth hydraulic cylinder drives the lifting ring to rise and fall, adjusting the height of the C-shaped toothed ring. This is suitable for irregularly shaped ring forgings with different diameters or end face features. The fifth hydraulic cylinder drives the sliding arm to move along the guide rail on the lifting ring, achieving a wide-range radial positioning of the forging head away from or close to the irregularly shaped ring forging. The second motor drives the first rotating tooth to rotate, and through meshing with the external tooth fixed on the base, drives the entire rotating tooth to revolve around the column. The third motor drives the second rotating tooth to rotate, and through meshing with the C-shaped toothed ring, drives the slide to slide along the C-shaped rail in the circumferential direction of the C-shaped toothed ring. The forging head can independently adjust its starting point on the circumference of the irregularly shaped ring forging or perform reciprocating forging in local areas without changing the main body of the revolution. Step 3: The scanner is fixed on the carriage and moves synchronously with the forging head, directly scanning the temperature and geometric dimensions of the formed area behind the forging head. The scanner acquires point cloud data and temperature field data of the irregular ring forging surface in real time. The control system has a built-in "digital twin" process model of the irregular ring forging. This model not only includes the final target 3D CAD, but also the intermediate expected shape of each forging stage. The system compares the real-time scan data with the expected shape of the current stage at high speed. The algorithm calculates the dimensional deviation, shape error and temperature anomaly. Based on the deviation, the control system generates coordinated control commands for the first hydraulic cylinder, the third motor, the second motor and the hydraulic cylinder. Each actuator receives the command and acts to change the forging parameters of the next revolution or the subsequent angle of the same revolution, thereby compensating for the detected deviation in real time.

[0015] The beneficial effects of this invention are: It has achieved adaptive precision forming of complex irregular ring forgings: by integrating online 3D scanning and "digital twin" model comparison technology, the device can perceive the deviation between the processing state and the target state in real time, and automatically generate compensation strategies to drive multi-axis actuators to perform collaborative correction, transforming the traditional "trial and error" processing that relies on human experience into "intelligent" forming based on data, which significantly improves the one-time forming accuracy and pass rate. It has the ability to adjust the position and posture of the forging head with multiple degrees of freedom and high flexibility: The forging head achieves position and posture control of up to five degrees of freedom through a combination of multiple motions such as "rotation of the ring", "sliding of the carriage on the C-tooth ring", "radial movement of the sliding arm", "lifting and lowering of the lifting ring" and "radial micro-feeding of the first hydraulic cylinder". This allows it to flexibly adapt to various irregular contours and execute complex local forging paths, such as thickening of specific bosses or filling of contour depressions. The unique "follow-up scanning-instant feedback" closed-loop control mechanism: The scanner and the forging head are integrated on the same carriage and scan immediately after the forging head. This allows the device to instantly acquire the forming effect and temperature distribution of the latest forging area and feed the information back to the control system. The control system adjusts the forging parameters for the next moment or the next cycle based on the feedback with almost no delay, forming an instantaneous closed loop of "forging-measurement-adjustment". This effectively suppresses error accumulation and is especially suitable for the control of hot forming processes of temperature-sensitive materials. Highly efficient and reliable multi-point synchronous automatic centering and clamping mechanism: The turntable is driven by the first motor, and the rotational motion is converted into the synchronous radial linear motion of multiple sliders through the arc groove-guide rod mechanism. This drives all limit rods to extend and retract synchronously. Combined with the lifting of the second hydraulic cylinder and the micro-pressure of the third hydraulic cylinder, it realizes the rapid, automatic, multi-point synchronous radial centering and axial clamping of irregular ring forgings. The mechanism has stable clamping and can adapt to the dimensional fluctuations of irregular ring forgings within a certain range. Moreover, the clamping force is uniform, avoiding deformation or clamping damage of irregular ring forgings, and providing a solid process foundation for high-precision rotary forging. Process digitization and traceability: Based on the comparison and control of the "digital twin" model, the entire rotary forging process is fully digitized. The processing path, parameter adjustment records, and final test data of each product can be saved and traced, providing a data foundation for process optimization, quality analysis, and product life cycle management, which is in line with the development trend of intelligent manufacturing. It improves production efficiency and material utilization: the device can complete the finishing of multiple local defects or features in a single clamping of irregular ring forgings, avoiding multiple heating, multiple clamping and a large amount of subsequent machining, shortening the process flow, improving production efficiency, reducing material waste and lowering production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall first structure of the present invention; Figure 2 This is a schematic diagram of the overall second structure of the present invention; Figure 3 This is a schematic diagram of the first internal structure of the column of the present invention; Figure 4 This is a schematic diagram of the second internal structure of the column of the present invention; Figure 5 This is a schematic diagram of the turntable installation structure of the present invention.

[0017] Legend: 1. Base; 2. Column; 3. Support ring; 4. Inner ring seat; 5. Rotary ring; 6. Lifting ring; 7. Sliding arm; 8. C-tooth ring; 9. Slide frame; 10. First hydraulic cylinder; 11. Mounting seat; 12. Forging head; 13. Scanner; 14. Second hydraulic cylinder; 15. Lifting plate; 16. Side groove; 17. Connecting arm; 18. Plate seat; 19. Third hydraulic cylinder; 20. Slide rail; 21. Slide groove; 22. Slider; 23. Limiting rod; 24. First motor; 25. Turntable; 26. Arc groove; 27. Guide rod; 28. External tooth; 29. ​​First rotating tooth; 30. Second motor; 31. Fourth hydraulic cylinder; 32. Fifth hydraulic cylinder; 33. C-shaped rail; 34. Third motor; 35. Second rotating tooth. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Specific implementation examples are given below.

[0020] See Figures 1-5A rotary forging device for local plastic deformation of irregularly shaped ring forgings includes a base 1 and a column 2. The column 2 is installed in the middle of the base 1, and a support ring 3 is mounted on the column 2. An inner ring seat 4 adapted to the interior of the irregularly shaped ring forging is detachably installed on the support ring 3. A second hydraulic cylinder 14 is installed inside the base 1, and a lifting plate 15 is installed inside the hollow column 2 with the telescopic end of the second hydraulic cylinder 14. Several side grooves 16 are opened on the outer side of the column 2, and several connecting arms 17 are installed on the outer side of the lifting plate 15, with the connecting arms 17 passing through the side grooves 16 and connecting to the support ring 3. A plate seat 18 is installed on the support ring 3, and a third hydraulic cylinder 19 is symmetrically installed on the plate seat 18, with the telescopic end of the third hydraulic cylinder 19 connected to the lifting plate 15. Several sets of slide rails 20 are arranged at equal angles around the bottom side of the lifting plate 15, and several sliding grooves 21 parallel to the slide rails 20 are opened on the bottom side of the lifting plate 15, on which sliding... A slider 22 is installed, and a limiting rod 23 that extends and retracts within the side groove 16 is installed on the slider 22. A first motor 24 is installed in the middle of the bottom side of the lifting plate 15. A turntable 25 is installed inside the lifting plate 15 at the output end of the first motor 24. Several arc-shaped grooves 26 are opened at equal angles on the turntable 25. A guide rod 27 that passes through the slide groove 21 and the arc-shaped groove 26 is installed on the slider 22. Inside the column 2, the second hydraulic cylinder 14 drives the lifting plate 15 to rise and fall. The lifting plate 15 is connected to the support ring 3 through the side groove 16 of the column 2 via the connecting arm 17. The inner ring seat 4 on the support ring 3 can be replaced according to the inner shape of the irregular ring forging 100. A radial synchronous telescopic mechanism composed of the first motor 24, turntable 25, arc-shaped groove 26, guide rod 27, slider 22, slide rail 20 and limiting rod 23 is provided below the lifting plate 15 for pressing the upper end of the irregular ring forging. The third hydraulic cylinder 19 on the plate seat 18 provides auxiliary pressing force. A rotating ring 5 is rotatably mounted on a base 1. The base 1 and the rotating ring 5 are connected by bearings. An external tooth 28 is provided on the outer side of the base 1. A second motor 30 is mounted on the rotating ring 5. A first rotating tooth 29 that meshes with the external tooth 28 is installed at the output end of the second motor 30. The second motor 30 drives the first rotating tooth 29 to rotate. By meshing with the external tooth 28 fixed on the outer side of the base 1, the entire rotating ring 5 is driven to rotate 360 ​​degrees around the base 1, thus realizing the basis for continuous or indexed circumferential forging of the ring part. The forging head 12 is mounted on the rotating ring 5 through subsequent stages of mechanisms, so it revolves with the rotating ring 5, thereby covering the entire circumference of the irregular ring forging. A lifting ring 6 is mounted on the rotating ring 5. A lifting ring 6 is mounted on the bottom side of the rotating ring 5. Several fourth hydraulic cylinders 31 are provided, with their telescopic ends connected to the lifting ring 6. The lifting ring 6 allows for the overall adjustment of the height of the C-tooth ring 8, the slide 9, and the forging head 12. This enables the device to flexibly handle ring forgings of different diameters or to position the forgings based on axial variations such as end face bosses and grooves on irregularly shaped ring forgings, ensuring that the forging head 12 is accurately aligned with the area to be processed. A sliding arm 7 is slidably mounted on the lifting ring 6, and a guide rail is slidably connected to the sliding arm 7. A fifth hydraulic cylinder 32 is mounted on the lifting ring 6, with its telescopic end connected to the sliding arm 7. The telescopic movement of the fifth hydraulic cylinder 32 directly drives the sliding arm 7 to move linearly along the guide rail. The forging head 12 moves radially towards or away from the central column 2, enabling "coarse adjustment" or "rapid advance and retreat" of the forging head 12 in the radial direction. During loading / unloading or changing irregularly shaped ring forgings, the forging head 12 can be quickly retracted to a safe position. Before processing, it can be quickly advanced to a preparatory position close to the outer surface of the irregularly shaped ring forging. A C-shaped toothed ring 8 with its opening facing the column 2 is mounted on the sliding arm 7. A slide 9 is slidably mounted on the C-shaped toothed ring 8, and a first hydraulic cylinder 10 is mounted on the slide 9. A mounting seat 11 is mounted on the telescopic end of the first hydraulic cylinder 10, and the forging head 12 is mounted on the mounting seat 11. A scanner 13 is mounted on the slide 9. C-shaped rails 33 are symmetrically arranged on the sidewalls of the C-shaped toothed ring 8, and the slide 9 and C-shaped rails 33 are symmetrically arranged. The guide rail 33 is slidably installed, and a third motor 34 is installed on the carriage 9. A second rotating tooth 35 is installed at the output end of the third motor 34, and the second rotating tooth 35 meshes with the C-shaped tooth ring 8. The third motor 34 on the carriage 9 drives the second rotating tooth 35 to rotate. By meshing with the teeth on the C-shaped tooth ring 8, the carriage 9 and all its components are driven to slide along the C-shaped guide rail 33 in the circumferential direction. This allows the forging head 12 to be independently and quickly finely adjusted in the circumferential direction while revolving with the rotating ring 5. By coordinating the "revolution" driven by the second motor 30 and the "rotation" driven by the third motor 34, complex planar motion trajectories can be synthesized, greatly enhancing the ability to handle irregular contours.

[0021] Working principle: The second hydraulic cylinder 14 drives the lifting plate 15 to rise and fall, which in turn drives the support ring 3 to rise and fall. The support ring 3 is equipped with an inner ring seat 4 that is adapted to the inner wall of the irregular ring forging. The irregular ring forging is fitted onto the support ring 3. The first motor 24 drives the turntable 25 to rotate. The arc groove 26 on the turntable 25 cooperates with the guide rod 27 fixed on the slider 22. The design of the arc groove 26 converts the rotational motion of the turntable 25 into the synchronous radial linear motion of the slider 22 along the slide rail 20. All sliders 22 move radially synchronously, driving the limit rod 23 to extend and retract in the side groove 16 of the column 2. During the loading and unloading of the irregular ring forging, the limit rod 23 retracts into the side groove 16. When the irregular ring forging is limited and fixed, the limit rod 23 extends out of the side groove 16. At the same time, the third hydraulic cylinder 19 retracts to realize the downward movement of the plate seat 18 and the limit rod 23. The limit rod 23 contacts the top side of the irregular ring forging, realizing the centered positioning and fixing of the irregular ring forging. The fourth hydraulic cylinder 31 drives the lifting ring 6 to rise and fall, adjusting the height of the C-shaped toothed ring 8. This is suitable for irregularly shaped ring forgings with different diameters or end face features. The fifth hydraulic cylinder 32 drives the sliding arm 7 to move along the guide rail on the lifting ring 6, achieving a wide-range radial positioning of the forging head 12 away from or close to the irregularly shaped ring forging. The second motor 30 drives the first rotating tooth 29 to rotate. By meshing with the external tooth 28 fixed on the base 1, it drives the entire rotating ring 5 to revolve around the column 2. The third motor 34 drives the second rotating tooth 35 to rotate. By meshing with the C-shaped toothed ring 8, it drives the slide 9 to slide along the C-shaped rail 33 in the circumferential direction of the C-shaped toothed ring 8. The forging head 12 can independently adjust its starting point on the circumference of the irregularly shaped ring forging or perform reciprocating forging in local areas without changing the main body of the revolution. The scanner 13 is fixed on the carriage 9 and moves synchronously with the forging head 12. It directly scans the temperature and geometric dimensions of the formed area behind the forging head 12. The scanner 13 acquires point cloud data and temperature field data of the surface of the irregular ring forging in real time. The control system has a built-in "digital twin" process model of the irregular ring forging. This model not only includes the final target 3D CAD, but also the intermediate expected shape of each forging stage. The system compares the real-time scan data with the expected shape of the current stage at high speed. The algorithm calculates the size deviation, shape error and temperature anomaly. Based on the deviation, the control system generates coordinated control commands for the first hydraulic cylinder 10, the third motor 34, the second motor 30 and the hydraulic cylinder. Each actuator receives the command and acts to change the forging parameters of the next turn or the subsequent angle of the same turn, thereby compensating for the detected deviation in real time.

[0022] Taking the correction of a local wall thickness of a titanium alloy irregular flange as an example, the irregular ring forging is placed on the inner ring seat 4, the clamping program is started, the limit rod 23 extends synchronously and moves upward to press the upper end face of the irregular ring forging, the control system retrieves the digital model of the irregular ring forging, plans the forging path, the fourth hydraulic cylinder 31 adjusts the height of the forging head 12 to the outer edge of the flange, the fifth hydraulic cylinder 32 drives the sliding arm 7 forward, so that the forging head 12 approaches the irregular ring forging, the second motor 30 and the third motor 34 work together to position the forging head 12 to the starting point of the area with insufficient wall thickness, start the rotary forging program, the second motor 30 drives the rotating ring 5 to slowly revolve, the forging head 12 rotates around the irregular ring forging, at the same time, the first hydraulic cylinder 10 applies pulse forging force according to the preset curve, the scanner 13 collects the contour and temperature of the forged area in real time, the control system compares the scan data with the model, finds that the compensation of a certain angle area is insufficient, and immediately adjusts the pressing amount of the first hydraulic cylinder 10 in the subsequent forging cycles of that area. After one cycle is completed, the re-inspection is qualified. All parts were returned and the irregularly shaped ring forgings were removed.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rotary forging device for localized plastic deformation of irregularly shaped ring forgings, characterized in that, The system includes a base (1) and a column (2). The column (2) is installed in the middle of the base (1). A support ring (3) is installed on the column (2). An inner ring seat (4) adapted to the inside of the irregular ring forging is detachably installed on the support ring (3). A rotating ring (5) is rotatably installed on the base (1). A lifting ring (6) is installed on the rotating ring (5). A sliding arm (7) is slidably installed on the lifting ring (6). A C-tooth ring (8) with its opening facing the column (2) is installed on the sliding arm (7). A slide frame (9) is slidably installed on the C-tooth ring (8). A first hydraulic cylinder (10) is installed on the slide frame (9). A mounting seat (11) is installed on the telescopic end of the first hydraulic cylinder (10). A forging head (12) is installed on the mounting seat (11). A scanner (13) is installed on the slide frame (9).

2. The rotary forging device for local plastic deformation of irregularly shaped ring forgings according to claim 1, characterized in that, The base (1) is equipped with a second hydraulic cylinder (14), and the extension end of the second hydraulic cylinder (14) is located in the hollow column (2) where a lifting plate (15) is installed. Several side grooves (16) are opened on the outside of the column (2), and several connecting arms (17) are installed on the outside of the lifting plate (15). The connecting arms (17) pass through the side grooves (16) and are connected to the support ring (3).

3. A rotary forging device for local plastic deformation of irregularly shaped ring forgings according to claim 2, characterized in that, A plate base (18) is installed on the support ring (3), and a third hydraulic cylinder (19) is symmetrically installed on the plate base (18), and the extension end of the third hydraulic cylinder (19) is connected to the lifting plate (15).

4. A rotary forging device for localized plastic deformation of irregularly shaped ring forgings according to claim 3, characterized in that, The lifting plate (15) has several sets of slide rails (20) arranged at equal angles around its bottom side. The lifting plate (15) has several slide grooves (21) parallel to the slide rails (20) on its bottom side. A slider (22) is slidably installed on the slide rails (20), and a limiting rod (23) that extends and retracts in the side groove (16) is installed on the slider (22).

5. A rotary forging device for localized plastic deformation of irregularly shaped ring forgings according to claim 4, characterized in that, The lifting plate (15) is equipped with a first motor (24) at the bottom center. The output end of the first motor (24) is located inside the lifting plate (15) and a turntable (25) is installed. Several arc-shaped grooves (26) are opened at equal angles on the turntable (25). A guide rod (27) that passes through the slide groove (21) and the arc-shaped groove (26) is installed on the slider (22).

6. A rotary forging device for localized plastic deformation of irregularly shaped ring forgings according to claim 5, characterized in that, The base (1) and the rotating ring (5) are connected by bearings. The base (1) has an external tooth (28) on its outer side. The rotating ring (5) is equipped with a second motor (30). The output end of the second motor (30) is equipped with a first rotating tooth (29) that meshes with the external tooth (28).

7. A rotary forging device for localized plastic deformation of irregularly shaped ring forgings according to claim 6, characterized in that, Several fourth hydraulic cylinders (31) are installed on the bottom side of the rotating ring (5), and the extension and retraction ends of the fourth hydraulic cylinders (31) are connected to the lifting ring (6).

8. A rotary forging device for local plastic deformation of irregularly shaped ring forgings according to claim 7, characterized in that, The lifting ring (6) is equipped with a guide rail that is slidably connected to the sliding arm (7). The lifting ring (6) is equipped with a fifth hydraulic cylinder (32), and the extension end of the fifth hydraulic cylinder (32) is connected to the sliding arm (7).

9. A rotary forging device for localized plastic deformation of irregularly shaped ring forgings according to claim 8, characterized in that, The C-shaped toothed ring (8) is symmetrically provided with C-shaped rails (33) on its sidewalls, and the slide (9) is slidably installed with the C-shaped rails (33). A third motor (34) is installed on the slide (9), and a second rotating tooth (35) is installed at the output end of the third motor (34), and the second rotating tooth (35) meshes with the C-shaped toothed ring (8).

10. The working method of the rotary forging device for local plastic deformation of irregularly shaped ring forgings according to claim 9, characterized in that, The specific operational steps of this working method are as follows: Step 1: The second hydraulic cylinder (14) drives the lifting plate (15) to rise and fall, which in turn drives the support ring (3) to rise and fall. An inner ring seat (4) adapted to the inner wall of the irregular ring forging is equipped on the support ring (3). The irregular ring forging is fitted onto the support ring (3). The turntable (25) is driven to rotate by the first motor (24). The arc groove (26) on the turntable (25) cooperates with the guide rod (27) fixed on the slider (22). The design of the arc groove (26) converts the rotational motion of the turntable (25) into the movement of the slider (22) along the slide rail (20). Synchronous radial linear motion, all sliders (22) move radially synchronously, driving the limit rod (23) to extend and retract in the side groove (16) of the column (2). During the loading and unloading of the irregular ring forging, the limit rod (23) retracts into the side groove (16). When the irregular ring forging is fixed, the limit rod (23) extends out of the side groove (16). At the same time, the third hydraulic cylinder (19) retracts to realize the downward movement of the disc seat (18) and the limit rod (23). The limit rod (23) contacts the top side of the irregular ring forging to realize the centering and fixing of the irregular ring forging. Step 2: The fourth hydraulic cylinder (31) drives the lifting ring (6) to rise and fall, adjusting the height of the C-shaped toothed ring (8), which is suitable for different diameters or irregular ring forgings with end face features. The fifth hydraulic cylinder (32) drives the sliding arm (7) to move along the guide rail on the lifting ring (6), realizing the large-range radial positioning of the forging head (12) away from or close to the irregular ring forging. The second motor (30) drives the first rotating tooth (29) to rotate, and through meshing with the external tooth (28) fixed on the base (1), drives the entire rotating ring (5) to revolve around the column (2). The third motor (34) drives the second rotating tooth (35) to rotate, and through meshing with the C-shaped toothed ring (8), drives the slide (9) to slide along the C-shaped rail (33) in the circumferential direction of the C-shaped toothed ring (8). The forging head (12) can independently adjust its starting point on the circumference of the irregular ring forging or perform reciprocating forging in a local area without changing the main body of the revolution. Step 3: The scanner (13) is fixed on the slide (9) and moves synchronously with the forging head (12). It directly scans the temperature and geometric dimensions of the formed area behind the forging head (12). The scanner (13) acquires the point cloud data and temperature field data of the surface of the irregular ring forging in real time. The control system has built-in the "digital twin" process model of the irregular ring forging. This model not only includes the final target 3D CAD, but also the intermediate expected shape of each forging stage. The system compares the real-time scanning data with the expected shape of the current stage at high speed. The algorithm calculates the size deviation, shape error and temperature anomaly. According to the deviation, the control system generates a coordinated control command for the first hydraulic cylinder (10), the third motor (34), the second motor (30) and the hydraulic cylinder. Each actuator receives the command and acts to change the forging parameters of the next circle or the subsequent angle of the same circle, thereby compensating for the discovered deviation in real time.

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