A precision manufacturing equipment for large heads

Abstract

This invention provides a precision production device for large end caps, comprising a first cantilever and a second cantilever. The first cantilever has a first forming wheel at its end and a downwardly extending inclined arm on it. The inclined arm has a first bearing housing along its extension direction, and the first bearing housing has an outer pressure wheel located obliquely below the first forming wheel. When the end cap is placed in the processing position, the first forming wheel and the outer pressure wheel abut against the inner and outer sides of the end cap, respectively. The second cantilever has a second forming wheel at its end and a transverse sliding seat on it. A lifting seat is drivenly connected to the transverse sliding seat. The lifting seat has a folding arm extending towards the side of the first cantilever and folding downwards. The folding arm has a downwardly extending second bearing housing, and the second bearing housing has an inner pressure wheel located obliquely above the second forming wheel. When the end cap is placed in the processing position, the second forming wheel and the inner pressure wheel abut against the outer and inner sides of the end cap, respectively.

Description

Technical Field

[0001] This invention relates to the field of end cap production technology, and in particular to a precision production equipment for large end caps. Background Technology

[0002] End caps are essential components in pressure vessel equipment in many industries such as petrochemicals, nuclear energy, food, and pharmaceuticals. They are end caps on pressure vessels and are a major pressure-bearing component of pressure vessels.

[0003] Heads are typically shaped using spinning technology. After initial processing by a pressing machine, the blank is placed on a spinning machine, the center portion is pressed, and then it rotates. The forming wheel and two pressure rollers located at the edges work together to apply pressure to the blank point by point, thereby processing it into the desired shape. For example, Chinese patent document ZL2007100120056 discloses such a large head spinning and flanging machine, which uses the cooperation of forming wheels and pressure rollers to process the required shape.

[0004] However, the current method for manufacturing double-layer heads requires two separate processes to produce an outer head and an inner head of different sizes, which are then placed coaxially and welded together. However, due to size constraints, the outer and inner heads produced in these two processes require two spinning machines for forming, making it difficult to perfectly align the edges of the two heads, thus affecting the stability after welding. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to produce large heads that form double-layer heads more precisely, and to provide a precision production equipment for large heads.

[0006] The technical solution of the present invention is a precision production equipment for large end caps, comprising a first cantilever and a second cantilever arranged opposite to each other. The first cantilever has a first forming wheel at its end and a downwardly extending inclined arm on it. A first bearing housing is provided on the inclined arm along its extending direction, and an external pressure wheel is provided on the first bearing housing located obliquely below the first forming wheel. When the end cap is placed in the processing position, the first forming wheel and the external pressure wheel respectively abut against the inner and outer sides of the end cap. The second cantilever has a second forming wheel at its end and a transverse shift seat on it. A lifting seat is connected to the transmission. The lifting seat has a folding arm extending towards the side where the first cantilever is located and folding downwards. A second bearing housing extends obliquely downwards on the folding arm. An inner pressure roller is located obliquely above the second forming roller on the second bearing housing. When the outer end cap is placed in the processing position, the second forming roller abuts against the inner side of the outer end cap. When the inner end cap is placed in the processing position, the second forming roller and the inner pressure roller abut against the outer and inner sides of the inner end cap, respectively. A bracket is provided below the middle of the first and second cantilever arms. The bracket is used to lift the outer end cap to the processing position. The frame is provided with several support members evenly distributed along the circumference. Each support member has an upward-facing inclined surface, and several universal balls are evenly distributed on the inclined surface. The support members together form a support carrier for the rotation of the outer end cap. A lifting frame is provided on one side of the middle of the first cantilever and the second cantilever. The crossbeam of the lifting frame extends above the support frame. A lifting arm is provided at the end of the crossbeam. A rotating disk is provided at the lower end of the lifting arm. The inner end cap is provided with a ring connecting the inner end cap to the rotating disk. The lifting arm presses the inner end cap against the first forming wheel and the second forming wheel. The rotating disk forms a support carrier for the rotation of the inner end cap. The first cantilever is also provided with a first side plate, and the first side plate is provided with a first cylinder box. The first cylinder box is provided with a first front cylinder and a first rear cylinder. The cylinder rods of the first front cylinder and the first rear cylinder are respectively connected to two lugs below the first bearing box. The folding arm is also provided with a second side plate, and the second side plate is provided with a second cylinder box. The second cylinder box is provided with a second front cylinder and a second rear cylinder. The cylinder rods of the second front cylinder and the second rear cylinder are respectively connected to two lugs on one side of the second bearing box.

[0007] In one embodiment, the first cantilever end is provided with a first speed reducer, the first forming wheel is connected to the first speed reducer, and the first speed reducer is also provided with a first rotary motor.

[0008] In one embodiment, the second cantilever end is provided with a second reducer, the second forming wheel is connected to the second reducer, and the second reducer is also provided with a second rotary motor, the second rotary motor and the first rotary motor rotate synchronously.

[0009] In one embodiment, a transverse motor is provided at the end of the transverse seat, and the transverse motor is used to drive the lifting seat to move transversely along the transverse seat.

[0010] In one embodiment, the lifting seat is provided with a lifting motor at its end, which is used to drive the lifting seat to move up and down relative to the transverse seat.

[0011] In one embodiment, a crane is provided on one side of the bracket, and two booms of the crane extend to both sides of the bracket. End arms are rotatably connected to the booms, and hydraulic arms are connected to the end arms. Lifting arms are provided on the hydraulic arms. Guide columns are also provided on both sides of the bracket. The lifting arms are slidably connected in the guide columns, and the bottom of the lifting arms is fixedly connected to the bracket.

[0012] In one embodiment, the lifting arm is provided with a U-shaped lifting frame at its end, and the two ends of the lifting frame are provided with arc surfaces that match the bottom of the outer end cap. The bottom of the lifting frame is fixedly connected to the bracket by a connecting steel.

[0013] In one embodiment, a hydraulic cylinder is connected between the rotating arm and the end arm.

[0014] The advantages of this invention compared to existing technologies are that, by using the first and second forming wheels as rotational drive carriers, the outer and inner end caps rotate synchronously in opposite directions on the outer and inner sides of the first and second forming wheels, respectively. The first and second forming wheels are mounted on opposite left and right cantilever arms. During processing, the outer end cap is supported by a lower bracket, and circumferentially distributed support members surround the bottom of the outer end cap, with universal joints facilitating its rolling. The circumferentially distributed support members surrounding the bottom of the outer end cap prevent wobbling during rotation. Thus, the first and second forming wheels on both sides drive the outer end cap to rotate smoothly. For the inner end cap, the first and second forming wheels are on the inner side, the opposite of the outer end cap's usage scenario, and the downward pressure of the lifting arm prevents wobbling. For the inner end cap, a ring pre-welded to it is connected to the rotating disk of the lifting arm, controlling the lowering of the lifting arm to press the inner end cap onto the first and second forming wheels. When positioned in the processing position, the first and second forming wheels abut against the inner side of the outer head, while the outer pressure wheel abuts against the outer side of the outer head. The pressure from the outer pressure wheel shapes the edge of the outer head. The first and second forming wheels also abut against the outer side of the inner head, while the inner pressure wheel abuts against the inner side of the inner head. The pressure from the inner pressure wheel shapes the edge of the inner head. Because the outer and inner heads are formed simultaneously on a single machine, the spacing between the edges of the processed outer and inner heads is relatively more uniform. Ultimately, the resulting double-layer head is more precise and the connection is more stable. Attached Figure Description

[0015] Figure 1 A first perspective view of a precision manufacturing equipment for large heads provided for an embodiment of the present invention; Figure 2 A second perspective view of a precision manufacturing equipment for large heads provided for an embodiment of the present invention; Figure 3 for Figure 2 A first partial enlarged view of the precision manufacturing equipment for large heads provided in the image; Figure 4 for Figure 2 A second partial enlarged view of the precision manufacturing equipment for large heads provided in the image; Figure 5 A third perspective view of a precision manufacturing equipment for large heads provided for an embodiment of the present invention.

[0016] In the diagram: 1. First cantilever; 2. Second cantilever; 3. First forming wheel; 4. Inclined arm; 5. First bearing housing; 6. External pressure wheel; 7. Outer end cap; 8. Second forming wheel; 9. Transverse seat; 10. Lifting seat; 11. Folding arm; 12. Second bearing housing; 13. Internal pressure wheel; 14. Internal end cap; 15. Bracket; 16. Support piece; 17. Inclined surface; 18. Universal ball; 19. Lifting frame; 20. Crossbeam; 21. Lifting arm; 22. Rotary disc; 23. Ring sleeve; 24. First side upright plate; 25. First hydraulic cylinder 26. First front hydraulic cylinder; 27. First rear hydraulic cylinder; 28. Second side upright plate; 29. ​​Second hydraulic cylinder box; 30. Second front hydraulic cylinder; 31. Second rear hydraulic cylinder; 32. First reducer; 33. First rotary motor; 34. Second reducer; 35. Second rotary motor; 36. Horizontal movement motor; 37. Lifting motor; 38. Crane; 39. Swing boom; 40. End boom; 41. Hydraulic boom; 42. Lifting boom; 43. Guide column; 44. Lifting frame; 45. Curved surface; 46. Connecting steel; 47. Hydraulic cylinder. Detailed Implementation

[0017] The above and other embodiments and advantages 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.

[0018] In one implementation, such as Figure 1-2 As shown.

[0019] The precision production equipment for large end caps provided in this embodiment includes a first cantilever 1 and a second cantilever 2 arranged opposite to each other. The first cantilever 1 has a first forming wheel 3 at its end, and a downwardly extending inclined arm 4 on it. The inclined arm 4 has a first bearing housing 5 arranged along its extension direction, and the first bearing housing 5 has an outer pressure wheel 6 located obliquely below the first forming wheel 3. When the outer end cap 7 is placed in the processing position, the first forming wheel 3 and the outer pressure wheel 6 respectively abut against the inner and outer sides of the outer end cap 7. The second cantilever 2 has a second forming wheel 8 at its end, and a transverse shift seat 9 on it. A lifting seat 10 is drivenly connected to the transverse shift seat 9. The lifting seat 10 has a folding arm 11 extending towards the side where the first cantilever 1 is located and folding downwards. The folding arm 11 has a downwardly extending second bearing housing 12, and the second bearing housing 12 has an inner pressure wheel 13 located obliquely above the second forming wheel 8. When the outer end cap 7 is placed in the processing position, the second forming wheel 8 abuts against the inner side of the outer end cap 7. When the inner end cap 14 is placed in the processing position, the second forming wheel 8 and the inner pressure wheel 13 abut against the outer and inner sides of the inner end cap 14, respectively. A bracket 15 is provided below the middle of the first cantilever 1 and the second cantilever 2. The bracket 15 is used to lift the outer end cap 7 to the processing position. The bracket 15 is provided with a number of support members 16 evenly distributed along the circumferential direction. The support members 16 are provided with an upward inclined surface 17. The inclined surface 17 is provided with a number of evenly distributed universal balls 18. The support members 16 together form a mechanism for the outer end cap 7 to rotate. The supporting carrier used; a lifting frame 19 is provided on one side of the middle of the first cantilever 1 and the second cantilever 2. The crossbeam 20 of the lifting frame 19 extends above the bracket 15. The end of the crossbeam 20 is provided with a lifting arm 21. The lower end of the lifting arm 21 is provided with a rotating disk 22. The inner end cap 14 is provided with a ring 23 that connects the inner end cap 14 to the rotating disk 22. The lifting arm 21 presses the inner end cap 14 onto the first forming wheel 3 and the second forming wheel 8. The rotating disk 22 forms a supporting carrier for the inner end cap 14 to rotate.

[0020] In this embodiment, unlike the traditional approach of processing one end cap at a time, the first forming wheel 3 and the second forming wheel 8 serve as the rotational drive carriers, causing the outer end cap 7 and the inner end cap 14 to rotate synchronously in opposite directions on the outer and inner sides of the first forming wheel 3 and the second forming wheel 8, respectively. The first forming wheel 3 and the second forming wheel 8 are mounted on the first cantilever 1 and the second cantilever 2 on opposite left and right sides. During processing, the outer end cap 7 is supported by the bracket 15 below, and the circumferentially distributed support members 16 surround the bottom of the outer end cap 7, with the universal ball joint 18 facilitating its rolling. This support structure using the bracket 15 is an improvement over existing structures, which often use a universal joint column located below the center of the outer end cap 7 for support. When the outer end cap 7 is driven to rotate by a single forming wheel, there is often a slight wobble on the opposite side. This is unsuitable for applications with forming wheels on both sides, as the wobble on the opposite side will prevent the opposite forming wheel from stably contacting the outer end cap 7. Therefore, in this embodiment, the circumferentially distributed support members 16 surround the bottom of the outer end cap 7 to prevent wobbling during rotation. This allows the first forming wheels 3 and the second forming wheels 8 on both sides to drive the outer end cap 7 to rotate smoothly. For the inner end cap 14, the first forming wheels 3 and the second forming wheels 8 are on the inside, the opposite of the usage scenario for the outer end cap 7, and the downward pressure of the lifting arm 21 prevents wobbling. For the inner end cap 14, a ring 23 pre-welded to it is connected to the rotating disk 22 of the lifting arm 21, controlling the lowering of the lifting arm 21 to press the inner end cap 14 onto the first forming wheels 3 and the second forming wheels 8. Then, when placed in the processing position, as... Figure 1-2 As shown, the first forming wheel 3 and the second forming wheel 8 abut against the inner side of the outer end cap 7, and the outer pressure wheel 6 abuts against the outer side of the outer end cap 7. The outer end cap 7 is shaped by the pressure of the outer pressure wheel 6. The first forming wheel 3 and the second forming wheel 8 also abut against the outer side of the inner end cap 14, and the inner pressure wheel 13 abuts against the inner side of the inner end cap 14. The inner end cap 14 is shaped by the pressure of the inner pressure wheel 13. Since the outer end cap 7 and the inner end cap 14 are formed simultaneously on one machine, the spacing between the edges of the processed outer end cap 7 and the inner end cap 14 is relatively more uniform. Then, several gaskets of different sizes are placed at different positions between the outer end cap 7 and the inner end cap 14 for welding and fixing. The resulting double-layer end cap is more precise and the connection is more stable.

[0021] In one implementation, such as Figure 3 As shown.

[0022] The precision production equipment for large end caps provided in this embodiment is further provided with a first side plate 24 on the first cantilever 1, a first cylinder box 25 on the first side plate 24, a first front cylinder 26 and a first rear cylinder 27 on the first cylinder box 25, and the cylinder rods of the first front cylinder 26 and the first rear cylinder 27 are respectively connected to two lugs below the first bearing box 5.

[0023] In this embodiment, a first front hydraulic cylinder 26 and a first rear hydraulic cylinder 27 are mounted on a first hydraulic cylinder housing 25, allowing them to move forward and backward. When the first front hydraulic cylinder 26 and the first rear hydraulic cylinder 27 are working, they cause the external pressure roller 6 to move up, down, forward, and backward. Of course, existing equipment also controls the external pressure roller 6 in this way. Controlling the external pressure roller 6 essentially shapes the edge of the end cap.

[0024] In one implementation, such as Figure 3 As shown.

[0025] The precision production equipment for large end caps provided in this embodiment is further provided with a second side plate 28 on the folding arm 11, a second cylinder box 29 on the second side plate 28, a second front cylinder 30 and a second rear cylinder 31 on the second cylinder box 29, and the cylinder rods of the second front cylinder 30 and the second rear cylinder 31 are respectively connected to two lugs on one side of the second bearing box 12.

[0026] In this embodiment, a second front cylinder 30 and a second rear cylinder 31 are mounted on a second cylinder housing 29, allowing them to move forward and backward. When the second front cylinder 30 and the second rear cylinder 31 are working, they cause the inner pressure roller 13 to move up, down, forward, and backward. This is essentially the same working principle as the outer pressure roller 6. Controlling the inner pressure roller 13 also shapes the edge of the other end cap.

[0027] In one implementation, such as Figure 3 As shown.

[0028] The precision production equipment for large end caps provided in this embodiment has a first reducer 32 at the end of the first cantilever 1, a first forming wheel 3 connected to the first reducer 32, and a first rotary motor 33 also provided on the first reducer 32.

[0029] In this embodiment, the first rotating motor 33 rotates and the speed is adjusted by the first reducer 32 to ultimately control the rotation of the first forming wheel 3. The main function of the first forming wheel 3 is to drive the end cap to rotate circumferentially, so that the pressure wheel can process the edge of the end cap to form it.

[0030] In one implementation, such as Figure 3 As shown.

[0031] The precision production equipment for large end caps provided in this embodiment has a second reducer 34 at the end of the second cantilever 2, a second forming wheel 8 connected to the second reducer 34, and a second rotary motor 35 on the second reducer 34. The second rotary motor 35 and the first rotary motor 33 rotate synchronously.

[0032] The second rotary motor 35 rotates, and the speed is adjusted by the second reducer 34, ultimately controlling the rotation of the second forming wheel 8. The function of the second forming wheel 8 is to synchronously drive the two end caps to rotate circumferentially, allowing the two pressure rollers to process the edges of the end caps and shape them. Due to their different positions, the two end caps rotate in opposite directions.

[0033] In one implementation, such as Figure 2 As shown.

[0034] The precision production equipment for large heads provided in this embodiment has a transverse motor 36 at the end of the transverse shift seat 9. The transverse motor 36 is used to drive the lifting seat 10 to move transversely along the transverse shift seat 9.

[0035] In this embodiment, driven by the transverse motor 36, the lifting seat 10 can be moved laterally through the structure of the lead screw and slider. After the inner end cap 14 is placed in place, the transverse seat 9 and the lifting seat 10 begin to adjust their positions so that the inner pressure roller 13 comes to the inside of the inner end cap 14.

[0036] In one implementation, such as Figure 2 As shown.

[0037] The precision production equipment for large end caps provided in this embodiment has a lifting motor 37 at the end of the lifting seat 10. The lifting motor 37 is used to drive the lifting seat 10 to lift relative to the transverse moving seat 9.

[0038] In this embodiment, driven by the lifting motor 37, the lifting seat 10 as a whole can be raised and lowered, rather than the folding arm 11 being raised and lowered relative to the lifting seat 10. Then, through another set of lead screws connected to the slider inside the transverse seat 9, that is, the transverse seat 9 and the lifting seat 10 share the same slider, the transverse motor 36 drives the slider to move transversely, and the lifting motor 37 drives the slider to remain stationary while the lifting seat 10 is limited to rising and falling within the transverse seat 9, thereby controlling the position of the folding arm 11, and finally bringing the inner pressure roller 13 to the inside of the inner end cap 14.

[0039] In one implementation, such as Figure 2 , Figure 5 As shown.

[0040] The precision production equipment for large end caps provided in this embodiment has a crane 38 on one side of the bracket 15. The two rotating arms 39 of the crane 38 extend to both sides of the bracket 15. An end arm 40 is rotatably connected to the rotating arm 39. A hydraulic arm 41 is connected to the end arm 40. A lifting arm 42 is provided on the hydraulic arm 41. Guide columns 43 are also provided on both sides of the bracket 15. The lifting arm 42 is slidably connected in the guide column 43. The bottom of the lifting arm 42 is fixedly connected to the bracket 15.

[0041] In this embodiment, the bracket 15 is raised and lowered by the rotating arm 39, end arm 40, hydraulic arm 41, and lifting arm 42, thereby lifting the outer head 7. The large head has considerable weight, requiring a crane 38 and hydraulic arm 41 for lifting. During the lifting process, the rotating arm 39 flips upward, while the lifting arm 42 is confined within the guide column 43 and rises. During this process, the hydraulic arm 41 extends to complete the lifting. Preferably, the end of the lifting arm 42 is provided with a U-shaped lifting frame 44, and both ends of the lifting frame 44 are provided with arc surfaces 45 that match the bottom of the outer head 7. The bottom of the lifting frame 44 is fixedly connected to the bracket 15 by connecting steel 46. Preferably, a hydraulic cylinder 47 is connected between the rotating arm 39 and the end arm 40. In this embodiment, supported by the crane 38 and surrounded by circumferentially distributed support members 16 around the bottom of the outer head 7, the entire operation is carried out at a high altitude, departing from traditional technical concepts. If any problems occur during the work, the workers standing below have almost no visual obstruction and can more easily detect them.

[0042] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A precision production equipment for large heads, characterized in that, It includes a first cantilever (1) and a second cantilever (2) arranged opposite to each other. The first cantilever (1) is provided with a first forming wheel (3) at its end. The first cantilever (1) is provided with a downwardly extending inclined arm (4). The inclined arm (4) is provided with a first bearing box (5) arranged along its extension direction. The first bearing box (5) is provided with an external pressure wheel (6) located obliquely below the first forming wheel (3). When the outer end cap (7) is placed in the processing position, the first forming wheel (3) and the external pressure wheel (6) respectively abut against the inner and outer sides of the outer end cap (7). The second cantilever (2) is provided with a second forming wheel (8) at its end. The second cantilever (2) is provided with a transverse seat (9). The transverse seat (9) is connected to a lifting seat (10). The lifting seat (10) is provided with a folding arm (11) extending toward the side where the first cantilever (1) is located and folding downward. The folding arm (11) is provided with a second bearing box (12) extending obliquely downward. The second bearing box (12) is provided with an inner pressure wheel (13) located obliquely above the second forming wheel (8). When the outer end (7) is placed in the processing position, the second forming wheel (8) abuts against the inner side of the outer end (7). When the inner end (14) is placed in the processing position, the second forming wheel (8) and the inner pressure wheel (13) abut against the outer side and inner side of the inner end (14), respectively. A bracket (15) is provided at the lower middle of the first cantilever (1) and the second cantilever (2). The bracket (15) is used to lift the outer end cap (7) to the processing position. The bracket (15) is provided with a number of support members (16) evenly distributed along the circumferential direction. The support members (16) are provided with an upward inclined surface (17). The inclined surface (17) is provided with a number of universal balls (18) evenly distributed. The number of support members (16) together form a support carrier for the rotation of the outer end cap (7). A lifting frame (19) is provided on one side of the middle of the first cantilever (1) and the second cantilever (2). The crossbeam (20) of the lifting frame (19) extends above the bracket (15). The end of the crossbeam (20) is provided with a lifting arm (21). The lower end of the lifting arm (21) is provided with a rotating disk (22). The inner end cap (14) is provided with a ring (23) that connects the inner end cap (14) to the rotating disk (22). The lifting arm (21) presses the inner end cap (14) onto the first forming wheel (3) and the second forming wheel (8). The rotating disk (22) forms a support carrier for the inner end cap (14) to rotate. The first cantilever (1) is also provided with a first side plate (24), the first side plate (24) is provided with a first cylinder box (25), the first cylinder box (25) is provided with a first front cylinder (26) and a first rear cylinder (27), and the cylinder rods of the first front cylinder (26) and the first rear cylinder (27) are respectively connected to two lugs below the first bearing box (5); The folding arm (11) is also provided with a second side plate (28), the second side plate (28) is provided with a second cylinder box (29), the second cylinder box (29) is provided with a second front cylinder (30) and a second rear cylinder (31), and the cylinder rods of the second front cylinder (30) and the second rear cylinder (31) are respectively connected to two lugs on one side of the second bearing box (12).

2. The precision production equipment for large heads according to claim 1, characterized in that, The first cantilever (1) is provided with a first reducer (32) at its end, the first forming wheel (3) is connected to the first reducer (32), and the first reducer (32) is also provided with a first rotary motor (33).

3. The precision production equipment for large heads according to claim 2, characterized in that, The second cantilever (2) is provided with a second reducer (34) at its end. The second forming wheel (8) is connected to the second reducer (34). The second reducer (34) is also provided with a second rotary motor (35). The second rotary motor (35) and the first rotary motor (33) rotate synchronously.

4. The precision production equipment for large heads according to claim 1, characterized in that, The transverse seat (9) is provided with a transverse motor (36) at its end, and the transverse motor (36) is used to drive the lifting seat (10) to move transversely along the transverse seat (9).

5. The precision production equipment for large heads according to claim 4, characterized in that, The lifting seat (10) is provided with a lifting motor (37) at its end. The lifting motor (37) is used to drive the lifting seat (10) to move up and down relative to the transverse seat (9).

6. The precision production equipment for large heads according to claim 1, characterized in that, A crane (38) is provided on one side of the bracket (15). Two rotating arms (39) of the crane (38) extend to both sides of the bracket (15). An end arm (40) is rotatably connected to the rotating arm (39). A hydraulic arm (41) is connected to the end arm (40). A lifting arm (42) is provided on the hydraulic arm (41). Guide columns (43) are also provided on both sides of the bracket (15). The lifting arm (42) is slidably connected in the guide column (43). The bottom of the lifting arm (42) is fixedly connected to the bracket (15).

7. The precision production equipment for large heads according to claim 6, characterized in that, The lifting arm (42) is provided with a U-shaped lifting frame (44) at its end. Both ends of the lifting frame (44) are provided with arc surfaces (45) that match the bottom of the outer end cap (7). The bottom of the lifting frame (44) is fixedly connected to the bracket (15) by a connecting steel (46).

8. The precision production equipment for large heads according to claim 6, characterized in that, A hydraulic cylinder (47) is connected between the rotating arm (39) and the end arm (40).

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