Thread rolling device for nuclear power station fastener machining

Abstract

The invention relates to the technical field of fastener machining, and discloses a thread rolling device for nuclear power station fastener machining, which comprises a base, two movable mounting frames are arranged on the base, rotating shafts are rotatably connected to the mounting frames, a thread roller is fixed on the rotating shafts, a movable mechanical clamping jaw is arranged on one side of the base, and a thread roller is arranged on the other side of the base. Semicircular clamping blocks are fixed to finger clamps of the mechanical clamping jaws, and a plurality of pin rollers are rotationally connected to the semicircular clamping blocks. A cleaning seat is arranged below the screw roller, a movable cover plate is arranged on the cleaning seat, and a movable mounting plate is arranged in the cleaning seat. According to the clamping device, fasteners with different diameters can be clamped, and the fasteners can be kept in a horizontal state with the circle centers of the semicircular clamping blocks and the screw roller in the clamping process; the thread rolling machining precision of fasteners with different diameters is improved, the machining efficiency of the fasteners is improved, time and labor are saved, and convenience and rapidness are achieved.

Description

Technical Field

[0001] This invention relates to the field of fastener processing technology, specifically to a thread rolling device for processing fasteners in nuclear power plants. Background Technology

[0002] Fasteners are the most widely used type of component, serving as a crucial basic element for fixing, transmitting force, connecting, positioning, adjusting, and sealing various types of machinery. Almost all mechanical products require fastener connections, and their quality plays a vital role in equipment performance and structural safety. Due to their diverse types, simple shapes and sizes, good interchangeability, and wide range of material options, fasteners are widely used in infrastructure industries such as transportation, defense, and machinery, and are ubiquitous in daily life. They are also extensively used in nuclear power plant safety systems and equipment. Nuclear power plant fasteners are key connecting components in nuclear power plant safety systems, undertaking functions such as pressure sealing, component connection, and support fixing, directly impacting the safety of nuclear facilities. Their quality and performance are crucial for the nuclear safety functions of nuclear power plant safety systems and equipment. Fastener manufacturing requires thread processing; thread rolling, in particular, can improve thread strength, surface quality, and production efficiency.

[0003] When thread rolling equipment processes the threads of fasteners for nuclear power plants, the unprocessed fasteners need to be manually placed on the placement blocks of the equipment to ensure that the center height of the fasteners and the two thread rollers of the equipment are aligned, thereby improving the thread processing accuracy. However, when processing fasteners of different diameters, the number of shims on the placement blocks needs to be manually increased or decreased to adjust the center height of the fasteners. This adjustment process involves continuously measuring the overall height of the placement blocks, which is time-consuming and labor-intensive, impacting the processing efficiency of the nuclear power plant fasteners. Summary of the Invention

[0004] This invention provides a thread rolling device for processing fasteners in nuclear power plants. It can clamp fasteners of different diameters, and during clamping, the fasteners remain horizontal with the center of the semi-circular clamping block and the thread roller. This not only improves the accuracy of thread rolling processing for fasteners of different diameters but also increases the efficiency of fastener processing, saving time and effort, and providing convenience and speed. It solves the problem mentioned in the background art where, when processing fasteners of different diameters in nuclear power plants, it is necessary to manually increase or decrease the number of shims on the placement block to adjust the center height of the fastener. During the adjustment process, the overall height of the placement block is constantly measured, which is time-consuming and labor-intensive, affecting the processing efficiency of fasteners in nuclear power plants.

[0005] The present invention provides the following technical solution: a thread rolling device for processing fasteners in nuclear power plants, comprising a base, two movable mounting brackets on the base, a rotating shaft rotatably connected to the mounting brackets, a thread roller fixed on the rotating shaft, a movable mechanical gripper on one side of the base, a semi-circular clamping block fixed on the finger gripper of the mechanical gripper, and a plurality of rollers rotatably connected to the semi-circular clamping block.

[0006] A cleaning seat is provided below the wire roller. The cleaning seat is provided with a movable cover plate and a movable mounting plate is provided inside the cleaning seat. A first abutment block is fixed below the mounting plate, and a brush plate and a sponge wiping block are respectively fixed on the mounting plate.

[0007] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a first sliding bracket is fixed on the base, the mounting bracket is slidably connected to the first sliding bracket, and a first electric push rod is connected to one side of the mounting bracket, the first electric push rod is fixed on the base, the cleaning seat is fixed on the first sliding bracket, a servo motor is mounted on the mounting bracket, and the motor shaft of the servo motor is fixedly connected to one end of the thread roller.

[0008] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a second electric push rod is fixed on the base, the piston rod of the second electric push rod is elastically connected to the mechanical gripper through a first spring, a first guide block is fixed on the mechanical gripper, a second sliding bracket is fixed on the base, and the second sliding bracket is slidably connected to the first guide block.

[0009] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a plurality of equally spaced balls are rotatably connected to the end face of the semicircular clamping block, and a limit stop is fixed on one side of the semicircular clamping block.

[0010] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a first abutment frame is fixed to the piston rod end of the second electric push rod, an L-shaped abutment strip is fixed to one end of the cover plate, a second guide block is fixed on the cleaning seat, a first guide rod is fixed on the L-shaped abutment strip, the first guide rod is elastically connected to the second guide block through a second spring, and a scraper is fixed on the cover plate.

[0011] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a hollow column is fixed on the cleaning seat, a strip column is slidably connected inside the hollow column, a third spring is connected between the strip column and the hollow column, a second guide rod is fixed on the mounting plate, and the second guide rod is elastically connected to the strip column through a fourth spring.

[0012] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a first abutting rod is slidably connected on the cleaning seat, and a strip block is fixed at one end of the first abutting rod, and the strip block abuts against the first abutting block.

[0013] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a comb plate is provided on the brush plate, a movable block is fixed on one side of the comb plate, and the movable block is slidably connected to the cleaning seat.

[0014] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: a column is fixed on one side of the base, a hollow rotating rod is rotatably connected to the column, a first abutment piece and several nozzles are fixed on the hollow rotating rod, a torsion spring is connected between the hollow rotating rod and the column, a second abutment frame is slidably connected to the column, one side of the second abutment frame abuts against the first abutment piece, and a second abutment piece is fixed on one of the rotating shafts.

[0015] As an optional embodiment of the thread rolling device for processing fasteners in nuclear power plants according to the present invention, wherein: an inverted chamfered abutment is slidably connected to the cleaning seat, a fifth spring is connected between the inverted chamfered abutment and the cleaning seat, and a second abutment wedge is fixed to the lower end of the second abutment.

[0016] The present invention has the following beneficial effects:

[0017] 1. In the thread rolling device for fastener processing in this nuclear power plant, the mounting bracket facilitates the installation of the thread rollers and servo motor. The first electric push rod drives the mounting bracket to move on the first sliding bracket on the base, so that when the fastener is threaded, the two rotating thread rollers are smoothly attached to the processing surface of the fastener for thread rolling. The semi-circular clamping blocks fixed on the two fingers of the mechanical gripper can clamp fasteners of different diameters. During the clamping process, the fastener can maintain a horizontal state with the center of the semi-circular clamping block and the thread roller, which not only improves the accuracy of thread rolling of fasteners of different diameters, but also improves the efficiency of fastener processing, saving time and effort, and is convenient and fast. Through the rotatable balls and rollers connected on the semi-circular clamping block, the fastener can easily contact and rotate synchronously with the rotating thread roller during the thread rolling process, ensuring that the thread profile of the fastener is uniformly formed.

[0018] 2. In the thread rolling device for fastener processing in this nuclear power plant, the mounting plate inside the cleaning seat facilitates the installation of the brush plate and sponge wiping block. The brush plate can remove metal shavings adhering to the thread roller, and the sponge wiping block can clean the gaps and surface of the thread roller to remove residual metal shavings. This avoids the increased friction between the thread roller and the fastener contact surface caused by residual shavings, which could lead to thread damage or dimensional deviations and affect the sealing performance of nuclear-grade fasteners. Timely cleaning of shavings can maintain the surface smoothness of the thread roller, reduce processing vibration, and thus ensure the quality of thread forming. The cover plate on the cleaning seat can prevent metal impurities from falling into the cleaning seat and adhering to the brush plate and sponge wiping block when the thread roller is not cleaned, thus affecting the cleaning effect. The comb plate can easily comb out the metal impurities remaining inside the brush plate, avoiding damage to the thread roller during brush cleaning. The scraper on the cover plate can clean the impurities combed on the comb plate and the impurities adhering to the sponge wiping block.

[0019] After the fastener held by the second electric push rod reaches the processing position, it can cause the first abutment frame to abut against the L-shaped abutment strip when it continues to move, so that the cover can be automatically opened from the cleaning seat. When the first abutment frame continues to move, it can abut against the first abutment rod, so that the strip block on the first abutment rod abuts against the first abutment block, so that the mounting plate can drive the brush plate and sponge wiping block to move up and abut against the surface of the wire roller, so as to facilitate the cleaning of the wire roller and improve the processing quality and precision of the fastener.

[0020] 3. In the thread rolling device for fastener processing in this nuclear power plant, several nozzles installed on the hollow rotating rod facilitate the spraying of coolant onto the surface of the thread roller and the fastener. This allows for cooling, lubrication, cleaning, and rust prevention of the thread roller and fastener, ensuring processing quality and equipment safety. The cooperation between the second contact plate and the second contact frame on the rotating shaft facilitates the contact between the thread roller and the second contact frame during rotation. This causes the second contact frame to slide automatically downward on the column, achieving the purpose of contact between the second contact frame and the first contact plate. This causes the hollow rotating rod to drive the nozzles to deflect automatically, improving the range and uniformity of coolant spraying.

[0021] When the second contact frame moves down, it can contact the C-shaped contact frame, causing the C-shaped contact frame to slide on the cleaning seat. This allows the mounting plate to reciprocate within the cleaning seat, causing the sponge wiping block and brush plate to automatically reciprocate on the surface of the wire roller during operation. This reduces cleaning dead angles and improves cleaning quality. Attached Figure Description

[0022] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention.

[0023] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention.

[0024] Figure 3 This is the third three-dimensional structural schematic diagram of the present invention.

[0025] Figure 4 This is a schematic diagram of the first abutment frame structure of the present invention.

[0026] Figure 5 This is a cross-sectional view of the cleaning seat structure of the present invention.

[0027] Figure 6 This is a schematic diagram of the cleaning seat structure of the present invention.

[0028] Figure 7 This is a schematic diagram of the internal structure of the cleaning seat of the present invention.

[0029] Figure 8 for Figure 6 Enlarged view of point A in the middle.

[0030] In the diagram: 1. Base; 2. Mounting bracket; 3. Rotating shaft; 4. Wire roller; 5. Mechanical gripper; 6. Semi-circular clamping block; 7. Roller; 8. Cleaning seat; 9. Cover plate; 10. Mounting plate; 11. First contact block; 12. Brush plate; 13. Sponge wiping block; 14. First sliding bracket; 15. First electric push rod; 16. Servo motor; 17. Second electric push rod; 18. First spring; 19. First guide block; 20. Second sliding bracket; 21. Ball bearing; 22. Limiting block; 23. First contact frame; 24. L-shaped contact strip; 25. Second guide block; 26. First guide rod; 27. Second spring; 28. Hollow column; 29. ​​Strip column; 30. Third spring; 31. Second guide rod; 32. Fourth spring; 33. Scraper; 34. First abutment rod; 35. Strip block; 36. Comb plate; 37. Moving block; 38. Column; 39. Hollow rotating rod; 40. First abutment piece; 41. Nozzle; 42. Torsion spring; 43. Second abutment frame; 44. Second abutment piece; 45. C-shaped abutment frame; 46. Fifth spring; 47. Second abutment wedge. Detailed Implementation

[0031] 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.

[0032] Example 1, please refer to Figures 1 to 8A thread rolling device for processing fasteners in nuclear power plants includes a base 1, two movable mounting brackets 2 on the base 1, a rotating shaft 3 rotatably connected to the mounting brackets 2, a thread roller 4 fixed on the rotating shaft 3, a movable mechanical gripper 5 on one side of the base 1, a cleaning seat 8 below the thread roller 4 of the mechanical gripper 5, a movable cover plate 9 on the cleaning seat 8, and a movable mounting plate 10 inside the cleaning seat 8, a first contact block 11 fixed below the mounting plate 10, and a brush plate 12 and a sponge wiping block 13 respectively fixed on the mounting plate 10.

[0033] A semi-circular clamping block 6 is fixed on the clamp, and several rollers 7 are rotatably connected to the semi-circular clamping block 6;

[0034] A cleaning seat 8 is provided below the wire roller 4. A movable cover plate 9 is provided on the cleaning seat 8, and a movable mounting plate 10 is provided inside the cleaning seat 8. A first abutment block 11 is fixed below the mounting plate 10, and a brush plate 12 and a sponge wiping block 13 are respectively fixed on the mounting plate 10.

[0035] A first sliding bracket 14 is fixed on the base 1. The mounting bracket 2 is slidably connected to the first sliding bracket 14. A first electric push rod 15 is connected to one side of the mounting bracket 2. The first electric push rod 15 is fixed on the base 1. The cleaning seat 8 is fixed on the first sliding bracket 14. A servo motor 16 is installed on the mounting bracket 2. The motor shaft of the servo motor 16 is fixedly connected to one end of the wire roller 4.

[0036] A second electric push rod 17 is fixed on the base 1. The piston rod of the second electric push rod 17 is elastically connected to the mechanical gripper 5 through the first spring 18. A first guide block 19 is fixed on the mechanical gripper 5. A second sliding bracket 20 is fixed on the base 1. The second sliding bracket 20 is slidably connected to the first guide block 19.

[0037] A number of equally spaced balls 21 are rotatably connected to the end face of the semicircular clamping block 6, and a limit stop 22 is fixed on one side of the semicircular clamping block 6.

[0038] refer to Figures 1 to 4 When machining threads on nuclear power plant fasteners, the fasteners are placed between two semi-circular clamping blocks 6. The distance between the two clamping fingers is adjusted by the mechanical jaws 5, causing the semi-circular clamping blocks 6 to clamp the fasteners. At the same time, several rotatably connected rollers 7 on the semi-circular clamping blocks 6 abut against the surface of the fasteners, so that the fasteners can rotate synchronously with the rotating thread rollers 4 during the thread rolling process. Meanwhile, the ends of the fasteners contact the balls 21 of the semi-circular clamping blocks 6, which reduces the friction between the fasteners and the semi-circular clamping blocks 6 during the rotation process, ensuring that the thread profile of the fasteners is uniformly formed and improving the quality of the thread rolling process.

[0039] After the nuclear power plant fastener is clamped, the second electric push rod 17 is activated. The piston rod of the second electric push rod 17 extends, driving the mechanical jaw 5 and the nuclear power plant fastener on the semi-circular clamping block 6 to move horizontally synchronously. The first guide block 19 on the mechanical jaw 5 slides on the second sliding bracket 20 on the base 1, so that the nuclear power plant fastener moves smoothly to the processing position between the two thread rollers 4. When the limit block 22 fixed on the semi-circular clamping block 6 abuts against the mounting frame 2, the nuclear power plant fastener moves into place, the mechanical jaw 5 stops moving, and the two first electric push rods 15 are activated. The two first electric push rods 15 push the mounting frame 2 to slide on the first sliding bracket 14 synchronously. At the same time, the servo motor 16 on the mounting frame 2 drives the rotating shaft 3 and the thread roller 4 fixed on the rotating shaft 3 to rotate. At this time, the two thread rollers 4 in the rotating state rotate in the same direction. The two thread rollers 4 in the rotating state are in contact with the processing surface of the fastener, thereby performing thread rolling. After the nuclear power plant fastener completes the thread rolling, the thread roller 4 and the mechanical jaw 5 are reset in sequence.

[0040] The semi-circular clamping block 6 and the center of the wire roller 4 are located on the same horizontal line. The semi-circular clamping block 6 on the two fingers of the mechanical gripper 5 can clamp fasteners of different diameters. During the clamping process, the fastener can keep the center of the semi-circular clamping block 6 and the center of the wire roller 4 horizontal. This ensures that the center of the wire roller 4 is also located on the same horizontal line after the fasteners of different diameters are clamped. This not only improves the accuracy of the wire rolling of fasteners of different diameters, but also improves the efficiency of fastener processing, saving time and effort, and making it convenient and fast.

[0041] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1 to 8 The piston rod end of the second electric push rod 17 is fixed with a first abutment frame 23, one end of the cover plate 9 is fixed with an L-shaped abutment strip 24, the cleaning seat 8 is fixed with a second guide block 25, the L-shaped abutment strip 24 is fixed with a first guide rod 26, the first guide rod 26 is elastically connected to the second guide block 25 through a second spring 27, and the cover plate 9 is fixed with a scraper 33.

[0042] A hollow column 28 is fixed on the cleaning seat 8. A strip column 29 is slidably connected inside the hollow column 28. A third spring 30 connects the strip column 29 and the hollow column 28. A second guide rod 31 is fixed on the mounting plate 10. The second guide rod 31 is elastically connected to the strip column 29 through a fourth spring 32.

[0043] A first abutment rod 34 is slidably connected to the cleaning seat 8. A strip block 35 is fixed to one end of the first abutment rod 34, and the strip block 35 abuts against the first abutment block 11.

[0044] The brush plate 12 is provided with a comb plate 36, and a movable block 37 is fixed on one side of the comb plate 36. The movable block 37 is slidably connected to the cleaning seat 8.

[0045] refer to Figures 1 to 8 When the wire roller 4 works for a long time, a large amount of metal waste will be attached to its surface, which will affect the quality and precision of the fastener processing of the nuclear power plant. It is necessary to clean the metal waste off the wire roller 4. When the wire roller 4 is performing wire rolling on the fastener of the nuclear power plant, the piston rod of the second electric push rod 17 continues to extend, causing the first abutment frame 23 to abut against the L-shaped abutment strip 24, so that the L-shaped abutment strip 24 drives the cover plate 9 to move on the cleaning seat 8, which can achieve the purpose of automatically opening the cleaning seat 8. At the same time, the first guide rod 26 on the L-shaped abutment strip 24 slides in the second guide block 25 on the cleaning seat 8, and the second spring 27 stores force.

[0046] When the piston rod of the second electric push rod 17 extends again, the first contact frame 23 maintains contact with the L-shaped contact strip 24 and also contacts the first contact rod 34, causing the first contact rod 34 to slide on the cleaning seat 8. This causes the strip block 35 to contact the first contact block 11, causing the strip column 29 on the mounting plate 10 to slide inside the hollow column 28 on the cleaning seat 8. The third spring 30 stores power, enabling the brush plate 12 and the sponge wiping block 13 fixed on the mounting plate 10 to move upward synchronously and automatically abut against the surface of the corresponding silk roller 4. The brush plate 12 can remove the metal shavings attached to the wire roller 4, and can remove large metal shavings from the wire roller 4. The sponge wiping block 13 can wipe the gaps and surface of the wire roller 4 to clean the remaining metal shavings. After the metal shavings on the wire roller 4 are cleaned, the residual shavings can be avoided, which can lead to increased friction between the wire roller 4 and the fastener, causing thread damage or dimensional deviation, and affecting the sealing performance of the nuclear-grade fastener. By cleaning the shavings in time, the surface smoothness of the wire roller can be maintained, the processing vibration can be reduced, and thus the quality of thread forming can be guaranteed.

[0047] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1 to 8 A column 38 is fixed to one side of the base 1. A hollow rotating rod 39 is rotatably connected to the column 38. A first contact piece 40 and several nozzles 41 are fixed to the hollow rotating rod 39. A torsion spring 42 is connected between the hollow rotating rod 39 and the column 38. A second contact frame 43 is slidably connected to the column 38. One side of the second contact frame 43 abuts against the first contact piece 40. A second contact piece 44 is fixed to one of the rotating shafts 3.

[0048] A C-shaped abutment frame 45 is slidably connected to the cleaning seat 8. A fifth spring 46 is connected between the C-shaped abutment frame 45 and the cleaning seat 8. A second abutment wedge 47 is fixed to the lower end of the second abutment frame 43.

[0049] refer to Figures 1 to 6To improve the thread rolling effect of fasteners in nuclear power plants, coolant is sprayed onto the surface of the thread roller 4 and the fastener during the thread rolling process. This process cools, lubricates, cleans, and prevents rust on the thread roller 4 and the fastener, ensuring processing quality and equipment safety. The hollow rotating rod 39 is connected to the coolant conveying equipment, allowing the coolant to flow into the nozzle 41 for spraying. When the thread roller 4 rotates, the second contact piece 44 on the rotating shaft 3 contacts the second contact frame 43. The second contact frame 43 slides downward on the column 38 due to the contact force. Since the upper end of the second contact frame 43 contacts the first contact piece 40 on the hollow rotating rod 39, the downward movement of the second contact frame 43 can drive the hollow rotating rod 39 to deflect on the column 38. The torsion spring 42 stores force, causing several nozzles 41 to deflect synchronously, which can improve the range and uniformity of coolant spraying.

[0050] When the mounting plate 10 moves the brush plate 12 and the sponge wiping block 13 upward to clean the wire roller 4, the mounting plate 10 can contact the inverted contact frame 45, causing the inverted contact frame 45 to slide on the cleaning seat 8. The fifth spring 46 stores force, causing the inverted contact frame 45 to automatically move closer to the bottom of the second contact frame 43. When the second contact frame 43 moves downward, it can drive the second contact wedge block 47 to contact the inverted contact frame 45, causing the inverted contact frame 45 to retract into the cleaning seat 8. This can achieve the purpose of pushing the mounting plate 10 to move horizontally within the cleaning seat 8. The second guide rod 31 on the mounting plate 10 slides on the strip column 29. The fourth spring 32 stores force, causing the sponge wiping block 13 and the brush plate 12 to automatically reciprocate on the surface of the wire roller 4 during operation, which can reduce cleaning dead corners and improve cleaning quality.

[0051] The first electric push rod 15, the second electric push rod 17, and the servo motor 16 are all electrically connected to the controller via wires.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A thread rolling device for processing fasteners in nuclear power plants, comprising a base (1), characterized in that: The base (1) is provided with two movable mounting brackets (2), and a rotating shaft (3) is rotatably connected to the mounting bracket (2). A wire roller (4) is fixed on the rotating shaft (3). A movable mechanical gripper (5) is provided on one side of the base (1). A semi-circular clamping block (6) is fixed on the finger clamp of the mechanical gripper (5). Several rollers (7) are rotatably connected to the semi-circular clamping block (6). A cleaning seat (8) is provided below the silk roller (4). A movable cover plate (9) is provided on the cleaning seat (8), and a movable mounting plate (10) is provided inside the cleaning seat (8). A first abutting block (11) is fixed below the mounting plate (10), and a brush plate (12) and a sponge wiping block (13) are fixed on the mounting plate (10).

2. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: The base (1) is fixed with a first sliding bracket (14), the mounting bracket (2) is slidably connected to the first sliding bracket (14), and a first electric push rod (15) is connected to one side of the mounting bracket (2). The first electric push rod (15) is fixed on the base (1), the cleaning seat (8) is fixed on the first sliding bracket (14), and a servo motor (16) is installed on the mounting bracket (2). The motor shaft of the servo motor (16) is fixedly connected to one end of the silk roller (4).

3. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: A second electric push rod (17) is fixed on the base (1). The piston rod of the second electric push rod (17) is elastically connected to the mechanical gripper (5) through a first spring (18). A first guide block (19) is fixed on the mechanical gripper (5). A second sliding bracket (20) is fixed on the base (1). The second sliding bracket (20) is slidably connected to the first guide block (19).

4. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: A number of equally spaced balls (21) are rotatably connected to the end face of the semicircular clamp (6), and a limit stop (22) is fixed on one side of the semicircular clamp (6).

5. The thread rolling device for processing fasteners in nuclear power plants according to claim 3, characterized in that: The piston rod end of the second electric push rod (17) is fixed with a first abutment frame (23), one end of the cover plate (9) is fixed with an L-shaped abutment strip (24), the cleaning seat (8) is fixed with a second guide block (25), the L-shaped abutment strip (24) is fixed with a first guide rod (26), the first guide rod (26) is elastically connected to the second guide block (25) through a second spring (27), and the cover plate (9) is fixed with a scraper (33).

6. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: A hollow column (28) is fixed on the cleaning seat (8), and a strip column (29) is slidably connected inside the hollow column (28). A third spring (30) is connected between the strip column (29) and the hollow column (28). A second guide rod (31) is fixed on the mounting plate (10), and the second guide rod (31) is elastically connected to the strip column (29) through a fourth spring (32).

7. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: A first abutment rod (34) is slidably connected to the cleaning seat (8). A strip block (35) is fixed to one end of the first abutment rod (34), and the strip block (35) abuts against the first abutment block (11).

8. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: The brush plate (12) is provided with a comb plate (36), and a moving block (37) is fixed on one side of the comb plate (36). The moving block (37) is slidably connected to the cleaning seat (8).

9. The thread rolling device for processing fasteners in nuclear power plants according to claim 1, characterized in that: A column (38) is fixed on one side of the base (1). A hollow rotating rod (39) is rotatably connected to the column (38). A first contact piece (40) and several nozzles (41) are fixed on the hollow rotating rod (39). A torsion spring (42) is connected between the hollow rotating rod (39) and the column (38). A second contact frame (43) is slidably connected to the column (38). One side of the second contact frame (43) abuts against the first contact piece (40). A second contact piece (44) is fixed on one of the rotating shafts (3).

10. The thread rolling device for processing fasteners in nuclear power plants according to claim 9, characterized in that: A U-shaped contact frame (45) is slidably connected to the cleaning seat (8), and a fifth spring (46) is connected between the U-shaped contact frame (45) and the cleaning seat (8). A second contact wedge (47) is fixed at the lower end of the second contact frame (43).

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