Pressure vessel end socket necking machining device and working method

Abstract

The invention relates to the technical field of end socket necking machining devices, and one embodiment of the invention provides a pressure vessel end socket necking machining device and a working method.The pressure vessel end socket necking machining device comprises a plurality of fixed discs, a downward pressing assembly and a downward moving assembly; the multiple fixing discs are arranged on the machining table, the areas of the multiple fixing discs are different, the multiple pressing assemblies are arranged above the machining table through the translation assembly, the multiple fixing discs are all arranged on the pressing assemblies, and the corresponding fixing discs are moved and moved downwards to the top ends of the attached sealing heads according to machining of the sealing heads of different sizes. The downward moving assembly is arranged on the side face of the machining table and used for driving the multiple fixing discs to move downwards. By means of the technical scheme, the technical problem that in the prior art, a disc for fixing an end socket is difficult to replace according to end sockets of different sizes and areas is solved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of head necking processing devices, and specifically, to a head necking processing device and working method for a pressure vessel head. Background Art

[0002] A pressure vessel refers to a closed device used to contain gases or liquids and bear a certain pressure. After containing materials, in order to maintain the seal, a head will be installed at the open end of the top of the pressure vessel. The head is a component used to close the end of the pressure vessel and can form a closed space with the pressure vessel. When processing the head, a necking treatment will be performed on it. Through the necking treatment, the diameter of the end of the head can be reduced, so that it can be connected to pressure vessels with different diameters.

[0003] When necking the head, the head will be placed on a rotating plate, and a disc is fixedly pressed on the top end of the head. While rotating the head, a rotating wheel contacts the side surface of the head, and the rotating wheel applies pressure to the side surface of the head, causing the end of the head to gradually contract and deform, thereby forming a neck.

[0004] The existing processing device has only one size for the disc used to fix the top end of the head. Therefore, it is difficult to change the size of the fixing disc accordingly according to different sizes of heads. If the size or area of the head to be processed is large, compared with when the head is small, when the disc contacts the top end of the head to fix it, the effect may not be good. The contact area between the disc and the top end of the head is small, so the friction between the two is small. Therefore, it is difficult to prevent the head from moving well during the rotating necking process. Summary of the Invention

[0005] To overcome the above defects, embodiments of the present disclosure provide a head necking processing device and working method for a pressure vessel head, which are used to solve the technical problem that the disc for fixing the head in the prior art is difficult to be replaced according to heads of different sizes and areas.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a head necking processing device for a pressure vessel head, including a processing table and a necking mechanism. The necking mechanism is arranged at the top of the processing table and is used to perform necking processing on the head. It further includes a fixing disc, a downward pressing component, and a downward moving component. A plurality of the fixing discs are provided, and the areas of the plurality of fixing discs are different. A plurality of the downward pressing components are provided. The plurality of downward pressing components are arranged above the processing table through a translation component, and a plurality of the fixing discs are all arranged on the downward pressing components. According to the processing of heads of different sizes, the corresponding fixing disc is moved and lowered to fit the top end of the head. The downward moving component is arranged on the side of the processing table and is used to drive the plurality of fixing discs to move downward respectively.

[0007] Further, the moving component includes a support frame, a support cover, a reciprocating lead screw, a lead screw nut, a first motor, and a positioning component. A plurality of the support frames are provided, and the plurality of support frames are respectively fixedly installed on both sides of the processing table. The support cover is fixedly installed between the plurality of support frames. The reciprocating lead screw is rotatably installed in the support cover. The number of the lead screw nuts is the same as that of the fixed disks, and a plurality of the lead screw nuts are all threadedly installed on the reciprocating lead screw. The first motor is installed on the side of the support cover, and the output end of the first motor is coaxially connected to the reciprocating lead screw. The positioning component is arranged at the top of the support cover.

[0008] Further, the positioning component includes a first electric cylinder and a positioning frame. The first electric cylinder is installed at the top of the support cover. The positioning frame is U-shaped, and the side surface of the positioning frame is fixedly installed on the output end of the first electric cylinder.

[0009] Further, the pressing-down component includes a sliding box, a pressing-down block, and a rack. The sliding box is fixedly installed at the bottom end of the lead screw nut, and a sliding groove is formed in the inner side wall of the sliding box. The pressing-down block is slidably installed in the sliding box through a slider, and the fixed disk is rotatably installed at the bottom end of the pressing-down block through a rotating shaft. The rack is fixedly installed on the side surface of the pressing-down block, and the rack is located above the fixed disk.

[0010] Further, the moving-down component includes a mounting frame, a second air cylinder, a pushing rod, a connecting frame, a supporting component, and a driving component. The mounting frame is fixedly installed at the top of the processing table. The second air cylinder is installed on the side of the mounting frame. The pushing rod is fixedly connected to the output end of the second air cylinder. The connecting frame is fixedly installed on the side surface of the pushing rod. The supporting component is arranged on the side of the mounting frame. The driving component is arranged on the connecting frame.

[0011] Further, the supporting component includes a supporting plate and a supporting rod. The supporting plate is fixedly installed on the side of the mounting frame, and a sliding groove is formed at the top end of the supporting plate. The bottom end of the supporting rod is slidably installed in the sliding groove of the supporting plate, and the bottom end of the pushing rod is fixedly connected to the top end of the supporting rod.

[0012] Further, the driving component includes a driving shaft, a driving gear ring, a second motor, a transmission wheel, and a conveyor belt. The driving shaft is rotatably installed on the connecting frame. The driving gear ring is fixedly installed on the driving shaft. The second motor is installed on the side of the connecting frame. There are two transmission wheels, and the two transmission wheels are respectively fixedly installed on the output end of the second motor and the driving shaft. The conveyor belt is tensioned and sleeved on the two transmission wheels.

[0013] Further, when the side surface of the positioning frame fits with the side surface of the sliding box, the center of the fixed disc and the center of the processing table are located at the same vertical position.

[0014] Further, through grooves are formed on both sides of the sliding box, through holes are formed on the side surface of the pressing block, and fixing rods are detachably installed in the through grooves and the through holes.

[0015] A working method for necking processing of a pressure vessel head uses a pressure vessel head necking processing device of the above scheme, including the following steps: S1. Move the fixed disc. When necking heads of different sizes, by starting the first motor, the output end of the first motor drives the reciprocating lead screw to rotate in the support cover, thereby driving a plurality of lead screw nuts to move left and right on the reciprocating lead screw, driving the fixed disc adapted to the top area of the head to move above the head. S2. Position the fixed disc. When moving the fixed disc, start the first electric cylinder. The first electric cylinder pushes the positioning frame to move backward, so as to be able to block the sliding box of the adapted fixed disc, make the fixed disc located directly above the processing table, and after the movement is completed, remove the fixing rod to facilitate the subsequent downward movement of the fixed disc. S3. Lower the fixed disc. After moving the fixed disc, start the second electric cylinder. The output end of the second electric cylinder drives the push rod and the connecting frame to move forward, so that the driving gear ring meshes with the rack on the side surface of the pressing block located directly above the processing table. Then start the second motor. The output end of the second motor drives the transmission wheel to rotate. Under the action of the tension sleeve of the conveyor belt, it drives another transmission wheel to rotate, and then drives the driving gear ring to rotate, drives the rack to move downward, and the rack drives the pressing block and the fixed disc to slide down in the sliding box, so that the fixed disc fits the top of the head and fixes it.

[0016] The beneficial effects of the embodiments of the present disclosure are as follows: 1. In the present disclosure, when fixing heads of different sizes, since the areas and sizes of a plurality of fixed discs are different, the adapted fixed disc can be driven by the moving assembly to move above the head according to the size of the head. Thus, when the fixed disc contacts the top of the head, the fixed disc and the top of the head can be fully contacted, thereby increasing the friction force and having a better fixing effect on the head during subsequent rotary necking.

[0017] 2. In the present disclosure, after moving the fixed disc, the fixed disc is driven to move downward by the pressing assembly and the downward movement assembly, so that it fits the top of the head, and the fixed discs moved above the head can be driven to move downward respectively. Thus, it can be ensured that when one fixed disc moves downward, the other fixed discs are located in their original positions and will not block each other during pressing and rotation.

[0018] In summary, through the mutual cooperation among the fixed disc, the moving component, the pressing-down component, and the downward-moving component, the device can contact the corresponding fixed disc with the head of different sizes, so that the fixed disc and the top of the head can be fully contacted during subsequent fixing, increasing the friction force and enhancing the fixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for description in the embodiments of the present disclosure. Obviously, the following-described drawings are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present disclosure and these drawings without creative efforts.

[0020] Figure 1 Structural schematic diagram of the whole invention; Figure 2 Structural schematic diagram of the support frame, support cover and first motor of the invention in cooperation; Figure 3 Structural schematic diagram of the fixed disc, sliding box and pressing-down block of the invention in cooperation; Figure 4 Structural schematic diagram of the mounting rack, second cylinder and support plate of the invention in cooperation; Figure 5 Structural schematic diagram of the processing table, rotating plate and third motor of the invention in cooperation; Figure 6 Partial cross-sectional structural schematic diagram of the sliding box, fixed rod and pressing-down block of the invention in cooperation.

[0021] In the figure: 1, processing table; 2, fixed disc; 3, support frame; 4, support cover; 5, reciprocating lead screw; 6, lead screw nut; 7, first motor; 8, first electric cylinder; 9, positioning frame; 10, sliding box; 11, pressing-down block; 12, rack; 13, mounting rack; 14, second cylinder; 15, push rod; 16, connecting frame; 17, support plate; 18, support rod; 19, drive shaft; 20, drive gear ring; 21, second motor; 22, transmission wheel; 23, conveyor belt; 24, rotating ring; 25, rotating plate; 26, placement rack; 27, third motor; 28, translation rack; 29, fourth motor; 30, third electric cylinder; 31, rotating wheel; 32, fixed rod; 33, U-shaped frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will further elaborate on the present disclosure in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than limiting the present disclosure.

[0023] For the sake of simplicity of the drawings, only the parts related to the disclosure are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, among the parts with the same structure or function in some drawings, only one of them is schematically shown, or only one of them is marked. In this text, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0024] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "install", "connect", and "link" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific situations.

[0025] In this disclosure, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or only indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or only indicating that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of this embodiment, the orientation or positional relationships such as "up", "down", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this disclosure.

[0027] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0028] Example 1, as Figures 1 to 6As shown, it shows a necking processing device for a pressure vessel head in an embodiment of the present disclosure, including a processing table 1 and a necking mechanism. The necking mechanism is arranged at the top of the processing table 1 and is used for necking the head. The necking mechanism includes a rotating ring 24, a rotating plate 25, a placing rack 26, a third motor 27, a translation rack 28, a fourth motor 29, a third electric cylinder 30 and a rotating wheel 31. The rotating ring 24 is fixedly installed on the processing table 1. The center of the rotating ring 24 and the center of the processing table 1 are located at the same vertical position, and a circular chute is provided on the inner side wall of the rotating ring 24. The rotating plate 25 is slidably installed in the circular chute of the rotating ring 24. The third motor 27 is installed on the processing table 1, and the output end of the third motor 27 is fixedly installed at the bottom end of the rotating plate 25. The placing rack 26 is fixedly installed at the center position of the rotating plate 25. The translation rack 28 is fixedly installed at the top end of one of the support frames 3, and the rotating wheel 31 is slidably installed on the inner side wall of the translation rack 28 through a U-shaped frame 33. The fourth motor 29 is installed above the U-shaped frame 33, and the output end of the fourth motor 29 is fixedly connected to the top end of the rotating wheel 31. The third electric cylinder 30 is installed on the side of the translation rack 28, and the output end of the third electric cylinder 30 is fixedly connected to the side of the U-shaped frame 33.

[0029] As Figure 5 shown, specifically, when necking the head, first place the head on the placing rack 26. Since the bottom end of the head is open, place the placing rack 26 into the inner cavity of the head. Then start the third motor 27. The output end of the third motor 27 drives the rotating plate 25 to drive the head to rotate in the circular chute of the rotating ring 24. Then start the third electric cylinder 30 to drive the U-shaped frame 33 to move forward, so that the rotating wheel 31 fits against the side of the head. Finally, start the fourth motor 29 to drive the rotating wheel 31 to rotate, applying pressure to the head for necking processing.

[0030] It further includes a fixed disk 2, a downward pressing component and a downward moving component. There are several fixed disks 2, and the areas of the several fixed disks 2 are different. There are several downward pressing components. The several downward pressing components are arranged above the processing table 1 through a translation component, and several fixed disks 2 are all arranged on the downward pressing components. Move and lower the corresponding fixed disk 2 to fit against the top end of the head according to the processing of heads of different sizes. The downward moving component is arranged on the side of the processing table 1 and is used to drive several fixed disks 2 to move downward respectively.

[0031] As Figure 2As shown, when rotating the head, in order to fix it, it is necessary to press the top of the head. Therefore, the moving component can drive the fixed disk 2 to move above the head. According to the different sizes of the heads to be processed, one of the several fixed disks 2 is moved to be adapted to it. The moving component includes a support frame 3, a support cover 4, a reciprocating lead screw 5, a lead screw nut 6, a first motor 7 and a positioning component. There are several support frames 3, and several support frames 3 are respectively fixedly installed on both sides of the processing table 1. The support cover 4 is fixedly installed between several support frames 3. The reciprocating lead screw 5 is rotatably installed in the support cover 4. The number of lead screw nuts 6 is the same as that of the fixed disks 2, and several lead screw nuts 6 are all threadedly installed on the reciprocating lead screw 5. The first motor 7 is installed on the side of the support cover 4, and the output end of the first motor 7 is coaxially connected to the reciprocating lead screw 5. The positioning component is arranged at the top of the support cover 4. The positioning component includes a first electric cylinder 8 and a positioning frame 9. The first electric cylinder 8 is installed at the top of the support cover 4. The positioning frame 9 is U-shaped, and the side of the positioning frame 9 is fixedly installed on the output end of the first electric cylinder 8.

[0032] Specifically, start the first motor 7. The output end of the first motor 7 drives the reciprocating lead screw to rotate in the support cover 4. It should be added that the lead screw nut 6 and the reciprocating lead screw 5 are in rolling thread transmission, which is a well-known technology. Therefore, the lead screw nut 6 can move on the reciprocating lead screw 5. At this time, start the first electric cylinder 8. The first electric cylinder 8 drives the positioning frame 9 to move backward, thereby blocking the pressing block 11 of the fixed disk 2 that meets the size. Because when the side of the positioning frame 9 fits with the side of the sliding box 10, the center of the fixed disk 2 and the center of the processing table 1 are located in the same vertical position. Therefore, the fixed disk 2 that meets the size can be located directly above the head. At this time, the rack 12 on the side of the fixed disk 2 that meets the size and the driving gear are located in the same horizontal position.

[0033] As Figure 3 、 Figure 4 and Figure 6As shown, after the movement is completed, the fixed disk 2 is moved downward by the downward movement component and the downward pressing component to fit and contact the top end of the head for fixing. The downward pressing component includes a sliding box 10, a downward pressing block 11 and a rack 12. The sliding box 10 is fixedly installed at the bottom end of the lead screw nut 6, and a chute is provided on the inner side wall of the sliding box 10. The downward pressing block 11 is slidably installed in the sliding box 10 through a slider, and the fixed disk 2 is rotatably installed at the bottom end of the downward pressing block 11 through a rotating shaft. The rack 12 is fixedly installed on the side surface of the downward pressing block 11 and is located above the fixed disk 2. The downward movement component includes a mounting frame 13, a second cylinder 14, a pushing rod 15, a connecting frame 16, a supporting component and a driving component. The mounting frame 13 is fixedly installed at the top end of the processing table 1. The second cylinder 14 is installed on the side surface of the mounting frame 13. The pushing rod 15 is fixedly connected to the output end of the second cylinder 14. The connecting frame 16 is fixedly installed on the side surface of the pushing rod 15. The supporting component is arranged on the side surface of the mounting frame 13. The driving component is arranged on the connecting frame 16. The supporting component includes a supporting plate 17 and a supporting rod 18. The supporting plate 17 is fixedly installed on the side surface of the mounting frame 13, and a chute is provided at the top end of the supporting plate 17. The bottom end of the supporting rod 18 is slidably installed in the chute of the supporting plate 17, and the bottom end of the pushing rod 15 is fixedly connected to the top end of the supporting rod 18. The driving component includes a driving shaft 19, a driving toothed ring 20, a second motor 21, a transmission wheel 22 and a conveyor belt 23. The driving shaft 19 is rotatably installed on the connecting frame 16. The driving toothed ring 20 is fixedly installed on the driving shaft 19. The second motor 21 is installed on the side surface of the connecting frame 16. There are two transmission wheels 22, and the two transmission wheels 22 are respectively fixedly installed at the output end of the second motor 21 and the driving shaft 19. The conveyor belt 23 is tensioned and sleeved on the two transmission wheels 22.

[0034] Specifically, start the second cylinder 14. The output end of the second cylinder 14 drives the push rod 15 and the connecting frame 16 to move forward until the driving gear ring 20 meshes with the rack 12. After the meshing is completed, start the second motor 21. The second motor 21 drives the transmission wheel 22 on its output end to rotate. Under the action of the tensioning sleeve of the conveyor belt 23, the transmission wheel 22 on the driving shaft 19 is driven to rotate, thereby driving the driving shaft 19 to rotate. The driving shaft 19 drives the driving gear ring 20 to rotate, and the driving gear ring 20 drives the rack 12 engaged with it to move downward. The rack 12 drives the pressing block 11 to move downward in the sliding box 10. The pressing block 11 drives the fixed disc 2 to move downward until it fits against the top of the head. Since through slots are provided on both sides of the sliding box 10 and through holes are provided on the side surface of the pressing block 11, the fixing rod 32 can be detachably installed in the through slots and through holes of the pressing block 11 and the sliding box 10. When other pressing blocks 11 do not need to move downward, the fixing rod 32 is inserted into the through slots and through holes of the pressing block 11 and the sliding box 10 to fix them. When it is necessary to move downward, it is disassembled. When the head rotates, while the fixed disc 2 fits against the head, since the fixed disc 2 is rotatably installed at the bottom end of the pressing block 11 through a rotating shaft, the fixed disc 2 can rotate synchronously with the head.

[0035] Working principle: When necking different-sized heads, first place the head on the placement rack 26, and then start the first motor 7. The output end of the first motor 7 drives the reciprocating screw to rotate in the support cover 4. The screw nut 6 moves on the reciprocating screw 5. At this time, start the first electric cylinder 8. The first electric cylinder 8 drives the positioning frame 9 to move backward, thereby blocking the pressing block 11 of the fixed disc 2 that meets the size, and positioning the fixed disc 2 that meets the size directly above the head. Then, remove the fixing rod 32 of the pressing block 11 and the sliding box 10 located at the upper end of the head. Start the second cylinder 14. The output end of the second cylinder 14 drives the push rod 15 and the connecting frame 16 to move forward until the driving gear ring 20 meshes with the rack 12. After the meshing is completed, start the second motor 21. The second motor 21 drives the transmission wheel 22 on its output end to rotate. Under the action of the tensioning sleeve of the conveyor belt 23, the transmission wheel 22 on the driving shaft 19 is driven to rotate, thereby driving the driving shaft 19 to rotate. The driving shaft 19 drives the driving gear ring 20 to rotate, and the driving gear ring 20 drives the rack 12 engaged with it to move downward. The rack 12 drives the pressing block 11 to move downward in the sliding box 10. The pressing block 11 drives the fixed disc 2 to move downward until it fits against the top of the head. Then, start the third electric cylinder 30 to drive the U-shaped frame 33 to move forward, so that the spinning wheel 31 fits against the side of the head. Then, start the fourth motor 29 to drive the spinning wheel 31 to rotate. At the same time, start the third motor 27. The output end of the third motor 27 drives the rotating plate 25 to drive the head to rotate in the circular chute of the rotating ring 24, thereby achieving the effect of applying pressure to the head for necking treatment.

[0036] Embodiment 2: On the basis of Embodiment 1 of the present application, a working method for necking processing of a pressure vessel head is supplemented and described as follows: S1. Move the fixed disk 2. When necking heads of different sizes, start the first motor 7. The output end of the first motor 7 drives the reciprocating lead screw 5 to rotate in the support cover 4, thereby driving a number of lead screw nuts 6 to move left and right on the reciprocating lead screw 5, and driving the fixed disk 2 adapted to the top area of the head to move above the head. S2. Position the fixed disk 2. When moving the fixed disk 2, start the first electric cylinder 8. The first electric cylinder 8 pushes the positioning frame 9 backward, so as to be able to block the sliding box 10 of the adapted fixed disk 2, make the fixed disk 2 located directly above the processing table 1, and after the movement is completed, remove the fixed rod 32 to facilitate the subsequent downward movement of the fixed disk 2. S3. Lower the fixed disk 2. After moving the fixed disk 2, start the second electric cylinder. The output end of the second electric cylinder drives the push rod 15 and the connecting frame 16 to move forward, so that the driving gear ring 20 meshes with the rack 12 on the side of the pressing block 11 located directly above the processing table 1. Then start the second motor 21. The output end of the second motor 21 drives the transmission wheel 22 to rotate. Under the action of the tensioning sleeve of the conveyor belt 23, another transmission wheel 22 is driven to rotate, and then the driving gear ring 20 is driven to rotate, driving the rack 12 to move downward. The rack 12 drives the pressing block 11 and the fixed disk 2 to slide down in the sliding box 10, so that the fixed disk 2 fits the top of the head and fixes it.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered within the scope of the claims of the present disclosure.

Claims

1. A necking processing device for a pressure vessel head, comprising a processing table (1) and a necking mechanism. The necking mechanism is arranged at the top of the processing table (1) and is used for necking the head. It is characterized in that, Further included are: Fixed disks (2), with a plurality of the fixed disks (2) provided, and the areas of the plurality of fixed disks (2) being different from each other; Pressing-down components, with a plurality of the pressing-down components provided. The plurality of pressing-down components are arranged above the processing table (1) through a translation component, and all the fixed disks (2) are arranged on the pressing-down components. According to the heads of different sizes to be processed, the corresponding fixed disks (2) are moved and lowered to fit the top ends of the heads; Lowering components, which are arranged on the side of the processing table (1) and are used to drive the plurality of fixed disks (2) to lower respectively.

2. The necking processing device for a pressure vessel head according to claim 1, characterized in that, The moving component includes: Support frames (3), with a plurality of the support frames (3) provided, and the plurality of support frames (3) are respectively fixedly installed on both sides of the processing table (1); Support covers (4), which are fixedly installed between the plurality of support frames (3); Reciprocating lead screws (5), which are rotatably installed in the support covers (4); Lead screw nuts (6), with the number of the lead screw nuts (6) being the same as that of the fixed disks (2), and all the lead screw nuts (6) are threadedly installed on the reciprocating lead screws (5); First motors (7), which are installed on the side of the support covers (4), and the output ends of the first motors (7) are coaxially connected to the reciprocating lead screws (5); Positioning components, which are arranged on the top ends of the support covers (4).

3. The necking processing device for a pressure vessel head according to claim 2, wherein, The positioning components include: First electric cylinders (8), which are installed on the top ends of the support covers (4); Positioning frames (9), which are U-shaped, and the sides of the positioning frames (9) are fixedly installed on the output ends of the first electric cylinders (8).

4. A necking processing device for a pressure vessel head according to claim 3, characterized in that, The pressing-down components include: Sliding boxes (10), which are fixedly installed at the bottom ends of the lead screw nuts (6), and the inner side walls of the sliding boxes (10) are provided with chutes; Pressing-down blocks (11), which are slidably installed in the sliding boxes (10) through sliders, and the fixed disks (2) are rotatably installed at the bottom ends of the pressing-down blocks (11) through rotating shafts; Racks (12), which are fixedly installed on the sides of the pressing-down blocks (11), and the racks (12) are located above the fixed disks (2).

5. The necking processing device for a pressure vessel head according to claim 4, wherein, The lowering components include: Mounting frames (13), which are fixedly installed on the top ends of the processing table (1); Second cylinders (14), which are installed on the sides of the mounting frames (13); Pushing rods (15), which are fixedly connected to the output ends of the second cylinders (14); Connecting frames (16), which are fixedly installed on the sides of the pushing rods (15); Support components, which are arranged on the sides of the mounting frames (13); Driving components, which are arranged on the connecting frames (16).

6. The necking processing device for a pressure vessel head according to claim 5, characterized in that, The support components include: Support plate (17), the support plate (17) is fixedly installed on the side of the mounting frame (13), and a chute is provided at the top end of the support plate (17); Support rod (18), the bottom end of the support rod (18) is slidably installed in the chute of the support plate (17), and the bottom end of the push rod (15) is fixedly connected to the top end of the support rod (18).

7. A necking processing device for a pressure vessel head according to claim 6, characterized in that, The drive assembly includes: Drive shaft (19), the drive shaft (19) is rotatably installed on the connecting frame (16); Drive gear ring (20), the drive gear ring (20) is fixedly installed on the drive shaft (19); Second motor (21), the second motor (21) is installed on the side of the connecting frame (16); Drive wheels (22), there are two drive wheels (22), and the two drive wheels (22) are respectively fixedly installed on the output end of the second motor (21) and the drive shaft (19); Conveyor belt (23), the conveyor belt (23) is tensioned and sleeved on the two drive wheels (22).

8. A necking processing device for a pressure vessel head according to claim 7, characterized in that, When the side of the positioning frame (9) fits the side of the sliding box (10), the center of the fixed disk (2) and the center of the processing table (1) are located in the same vertical position.

9. The necking processing device for a pressure vessel head according to claim 8, characterized in that, Both sides of the sliding box (10) are provided with through grooves, through holes are provided on the side of the pressing block (11), and a fixing rod (32) is detachably installed in the through grooves and the through holes.

10. A working method for necking processing of a pressure vessel head, which uses a device for necking processing of a pressure vessel head described in claim 9, is characterized in that, Including the following steps: S1. Move the fixed disk (2). When necking different-sized heads, by starting the first motor (7), the output end of the first motor (7) drives the reciprocating lead screw (5) to rotate in the support cover (4), thereby driving a number of lead screw nuts (6) to move left and right on the reciprocating lead screw (5), driving the fixed disk (2) adapted to the top area of the head to move above the head; S2. Position the fixed disk (2). When moving the fixed disk (2), start the first electric cylinder (8), the first electric cylinder (8) pushes the positioning frame (9) to move backward, so as to be able to block the sliding box (10) of the adapted fixed disk (2), make the fixed disk (2) located directly above the processing table (1), and after the movement is completed, remove the fixing rod (32) to facilitate the subsequent downward movement of the fixed disk (2); S3. Lower the fixed disk (2). After moving the fixed disk (2), start the second electric cylinder, the output end of the second electric cylinder drives the push rod (15) and the connecting frame (16) to move forward, so that the drive gear ring (20) meshes with the rack (12) on the side of the pressing block (11) located directly above the processing table (1), then start the second motor (21), the output end of the second motor (21) drives the drive wheel (22) to rotate, and drives the other drive wheel (22) to rotate under the action of the tensioned conveyor belt (23), further driving the drive gear ring (20) to rotate, driving the rack (12) to move downward, and the rack (12) drives the pressing block (11) and the fixed disk (2) to slide down in the sliding box (10), so that the fixed disk (2) fits the top of the head and fixes it.

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