CN210816884U

CN210816884U - Hump shaping device for large-diameter thin-wall cylinder

Info

Publication number: CN210816884U
Application number: CN201921590573.9U
Authority: CN
Inventors: 任刚
Original assignee: Zhejiang Bingpeng Automation Technology Co ltd
Current assignee: Zhejiang Bingpeng Automation Technology Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-23
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a hump shaping device for a large-diameter thin-wall cylinder, which comprises a swing mechanism, an inner mold movement mechanism and an outer mold lifting mechanism; the rotary mechanism comprises a rotary motor, an outer gear, a rotary motor fixing plate, an inner gear and an inner gear limiting ring, and drives the inner mold movement mechanism to rotate. The inner mold movement mechanism comprises an inner mold movement motor, a first fixed disk, a second fixed disk, a third fixed disk and a core rod. The outer mold lifting mechanism comprises an outer mold lifting motor, a second fixing plate and a third fixing plate. The inner mold movement mechanism and the outer mold lifting mechanism can enable the inner mold and the outer mold to be matched to carry out shaping processing on the cylinder body. The utility model relates to a shaping device adopts telescopic centre form and external mold to carry out the compound die shaping many times to the barrel through rotatory centre form cooperation external mold, can take shape convenience more to the hump of barrel, efficiency is higher, and the hump-shaped arch of the barrel that prepares does not have the fault that the centre form clearance arouses, and the leakproofness is better when making hump arch and turn-ups match.

Description

Hump shaping device for large-diameter thin-wall cylinder

Technical Field

The utility model belongs to the technical field of automobile exhaust system spare part production technique and specifically relates to a heavy-calibre thin wall barrel hump shaping device.

Background

In recent years, motor vehicle pollution becomes an important pollution source, and the prevention and treatment of motor vehicle pollution is enhanced by the ecological environment department according to the deployment of ten atmosphere. With the rapid increase of the quantity of motor vehicles, the energy conservation and emission reduction of motor vehicle emission become the key direction of prevention and treatment. And the light weight of the automobile can help to realize the emission reduction target. According to the relevant foreign test data, the vehicle weight is reduced by 10%, and the oil consumption can be reduced by 6% -8%. Meanwhile, for the truck carrying cargo, the effective load can be improved by reducing the dead weight, so that the transportation efficiency is improved, and the transportation cost is reduced. In addition, the light weight of the truck is also beneficial to the improvement of the safety performance; therefore, truck lightweighting has become an industry trend. New materials and new structures are generally adopted by large car enterprises to realize the light weight of each part.

In a truck post-processing system, flange structures are generally adopted for connecting all parts in the state five discharge stages, so that the truck post-processing system is heavy in weight, high in cost and complex in process; and in the six discharge stages of China, a hump and flanging port shaping structure is adopted to replace a welding flange.

The hump flanging port shaping structure is generally processed by adopting a spinning and stamping mode at present, has the defects of poor forming size precision, overlarge local material thinning proportion, serious indentation on the surface of a part and the like, and is difficult to meet the requirements of product sealing property and durability.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heavy-calibre thin wall barrel hump shaping device for the spare part of producing adopts hump, turn-ups port to replace the flange structure, can reduce the weight of whole spare part, realizes the lightweight of each spare part, and can make the barrel leakproofness of producing good.

In order to solve the technical problem, the purpose of the utility model is to realize like this:

the utility model relates to a hump shaping device for a large-diameter thin-wall cylinder, which comprises a swing mechanism, an inner mold movement mechanism and an outer mold lifting mechanism;

the rotary mechanism comprises a rotary motor, an external gear, a rotary motor fixing plate, an internal gear limiting ring and a first fixing plate; the rotary motor is fixed on the rotary motor fixing plate and drives the outer gear to rotate, and the outer gear and the inner gear are in meshing transmission; the rotary motor fixing plate is fixed with the internal gear limiting ring, and the internal gear limiting ring is fixed with the first fixing plate;

the inner mold movement mechanism comprises an inner mold movement motor, a first fixed disk, a second fixed disk, a third fixed disk and a core rod; the first fixed disk is fixed with the internal gear, and a connecting rod is arranged among the first fixed disk, the second fixed disk and the third fixed disk; the output end of the inner mold movement motor is connected with a screw rod, and the screw rod is connected with a core rod fixing piece through threads; the end part of the mandrel fixing piece is fixed with the mandrel;

the mandrel is provided with a mandrel working inclined plane; a plurality of inner mold mounting seats are circumferentially distributed on the periphery of the core rod; the core rod moves up and down to drive the inner mold mounting seat to move horizontally outwards or inwards; an inner die is fixed on the outer side of the inner die mounting seat, and an inner die forming bulge is arranged on the inner die; an elastic ring is arranged on the inner die mounting seat;

the outer mold lifting mechanism comprises an outer mold lifting motor, a second fixing plate and a third fixing plate; a guide post is arranged between the second fixing plate and the third fixing plate, one end of the guide post is fixed with the third fixing plate, and the other end of the guide post penetrates through the second fixing plate; through holes are formed in the second fixing plate and the third fixing plate in opposite positions; an outer die fixing seat lower limiting plate is fixedly arranged at the through hole of the second fixing plate, and an outer die lower pressing inclined cylinder is fixedly arranged at the through hole of the third fixing plate; the inner surface of the outer die downward pressing inclined cylinder is inclined outwards and is contacted with the outer die fixing seat; the outer surface of the outer mold fixing seat is inwards inclined; the inner side of the outer mold fixing seat is fixed with the outer mold; the outer mold is provided with an outer mold forming groove matched with the inner mold forming bulge; the outer die fixing seats are connected through springs.

As a further explanation of the above scheme, a second fixed disk center hole is formed in the center of the second fixed disk, fan-shaped protrusions are arranged around the second fixed disk center hole, and second fixed disk grooves are formed between the fan-shaped protrusions.

As a further explanation of the above scheme, the cross section of the inner mold is a sector cylinder, one side of which is provided with an inner mold forming protrusion, and the other side of which is provided with an inner mold fixing protrusion.

As a further explanation of the above scheme, one side of the internal mold mounting seat is provided with an internal mold mounting seat working inclined plane, the other side is arc-shaped, and a first internal mold mounting seat groove, a second internal mold mounting seat groove and a third internal mold mounting seat groove are arranged on the internal mold mounting seat.

As a further explanation of the above scheme, an outer mold limiting protrusion is arranged on one side of the outer mold opposite to the outer mold forming groove on the outer mold; the top of the outer mold is fixedly provided with a bolt; an outer die upper limiting plate is arranged above the outer die; an upper limiting hole is formed in the limiting plate on the outer die fixing seat; and the top of the outer die is provided with a bolt which can move in the upper limit hole.

As a further explanation of the above scheme, the whole outer mold fixing seat is in a step shape with an outward and inward inclined side, and the section is in a fan shape; spring mounting grooves are formed in two ends of the outer die fixing seat, and springs are arranged in the spring mounting grooves; the inner side of the outer mold fixing seat is provided with an outer mold limiting groove; a limiting block fixing groove is formed in the bottom surface of the outer mold fixing seat; a T-shaped limiting block is fixed in the limiting block fixing groove; the lower limiting plate of the outer mold fixing seat is provided with a lower limiting groove communicated with the outside; one end of the T-shaped limiting block is positioned in the lower limiting groove and moves along the lower limiting groove.

The utility model has the advantages that: the utility model relates to a heavy-calibre thin wall barrel hump shaping device adopts telescopic centre form and external mold to carry out the compound die shaping many times to the barrel through rotatory centre form cooperation external mold, can be to the hump of barrel take shape more convenient, efficiency is higher, and the hump shape arch of the barrel of preparing does not have the fault that the centre form clearance arouses, and the leakproofness is better when making hump arch and turn-ups match.

Drawings

Fig. 1 is a schematic perspective view of a shaping device according to the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 3 from another angle;

FIG. 5 is a schematic view of the swing mechanism;

FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;

FIG. 7 is a schematic structural view of an inner mold movement mechanism;

FIG. 8 is a schematic structural view of the inner mold;

FIG. 9 is a schematic structural view of an inner mold mounting block;

FIG. 10 is a schematic view of the structure of the mandrel;

FIG. 11 is a schematic structural view of a second fixing disk;

FIG. 12 is a schematic structural view of an outer mold lifting mechanism;

FIG. 13 is a schematic structural view of an outer mold;

FIG. 14 is a schematic structural view of an outer mold fixing seat;

FIG. 15 is a schematic structural diagram of a T-shaped stopper;

FIG. 16 is a schematic structural view of a lower limiting plate of an outer mold fixing seat;

FIG. 17 is a schematic structural view of a limiting plate on the outer mold;

fig. 18 is a schematic view of the structure of a workpiece being processed.

The designations in the figures illustrate the following: 1-a slewing mechanism; 11-a rotary electric machine; 12-a rotating electrical machine fixing plate; 13-an external gear; 14-internal gear; 15-internal gear spacing ring; 6-a first fixing plate; 17-signal detection means; 2-an internal mold movement mechanism; 21-an inner mold movement motor; 22-a first fixed disk; 220-a screw mandrel; 23-connecting rod 24-second fixed disk; 241-a central hole of a second fixed disc; 242 — second fixed disk groove; 243-fan shaped convex; 25-a core rod; 25 a-working slope of mandrel; 26-a third fixed disk; 27-a mandrel holder; 28-an inner mold; 281-forming a bulge in the inner die; 22-inner mold fixing projections; 29-inner mold mounting seat; 291-inner mold mount first groove; 292-an inner mold mounting seat second groove; 293-inner mold mounting seat third groove; 294-inner mold mounting seat limit projection; 29 a-inner mold mounting seat working inclined plane; 210-an elastic ring; 211-a second probe; 3-an outer mold lifting mechanism; 31-outer mold lifting motor; 32-a second fixing plate; 33-a second fixation plate; 34-a guide post; 35-pressing the inclined cylinder under the outer die; 36-outer mold fixing seats; 361-outer mold limiting groove; 362-spring mounting groove; 363-a stopper fixing groove; 37-external mold; 371-the outer mold molding groove; 372-outer mold limit protrusion; 38-limiting plate on the outer mold; 381-upper limiting orifice; 39-lower limiting plate of outer mold fixing seat; 391-lower limiting groove; 310-a first probe; 311-signal detection means; 312-signal detection device fixing plate; 313-T type limited block; 314-a spring; 315-lifter bar; 4-a workpiece; 41-hump bulge; 42-flanging; 5-a shell.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Examples

The present embodiment will be described in detail with reference to fig. 1 to 18. The hump shaping device for the large-diameter thin-wall cylinder body comprises a rotating mechanism 1, an inner mold moving mechanism 2 and an outer mold lifting mechanism 3. The rotation mechanism 1 drives the inner mold movement mechanism 2 to rotate, the rotation of the inner mold movement mechanism 2 can drive the inner mold 28 to rotate, and the core rod 25 can drive the inner mold 28 to move in the horizontal direction to match with the movement of the outer mold 38, so as to carry out hump processing and shaping on the cylinder work 4. The outer die lifting mechanism 3 can enable the outer die 38 to move in the opposite direction to the inner die, and the outer die and the inner die can be matched to process the work 4. The workpiece 4 to be processed is shown in fig. 18, and the workpiece 4 is a cylinder with a flange 42 at one end and a hump-shaped protrusion 41 at the other end. When the workpiece is installed, the flanging 42 of one workpiece 4 is inserted into the hump bulge 41 of the other workpiece 4, so that the two workpieces 4 are connected.

The swing mechanism 1 includes a swing motor 11, an external gear 13, a swing motor fixing plate 12, an internal gear 14, an internal gear retainer ring 15, and a first fixing plate 16. The rotary motor 11 is fixed on the rotary motor fixing plate 12, and the output end drives the external gear 13 to rotate, and the external gear 13 and the internal gear 14 are in meshing transmission. The fixing plate 12 of the rotary motor is fixed to the inner gear retainer ring 15, and the inner gear retainer ring 15 is fixed to the first fixing plate 16. A through hole is formed at the center of the first fixing plate 16, and the inner gear retainer 15 is fixed to one side of the first fixing plate 16. The side wall of the central through hole of the first fixing plate 16 and the internal gear limiting ring 15 of the rotary motor fixing plate 12 limit the internal gear 14. A plurality of signal detecting devices 17 are fixed near the central through hole of the first fixing plate 16.

The inner mold movement mechanism 2 includes an inner mold movement motor 21, a first fixed disk 22, a second fixed disk 24, a third fixed disk 26, and a mandrel 25. The first fixing plate 22 is fixed to the internal gear 14, and the internal gear 14 rotates while driving the first fixing plate 22 to rotate. And a second probe 211 is fixed to the first fixed platter 22, and when the second probe 211 passes through the signal detecting unit 17 while the first fixed platter 22 rotates, the angle of rotation of the first fixed platter 22 can be detected.

A connecting rod 23 is arranged among the first fixed disk 22, the second fixed disk 24 and the third fixed disk 26 to connect the first fixed disk, the second fixed disk and the third fixed disk, and the rotation of the first fixed disk 22 can drive the rotation of the second fixed disk 24 and the third fixed disk 26. The housing 5 is provided outside the first fixed disk 22, the second fixed disk 24, the third fixed disk 26, and the guide posts 34.

The output end of the inner mold movement motor 21 is connected with a screw rod 220, the screw rod 220 is connected with a core rod fixing piece 27 through threads, and the end part of the core rod fixing piece 27 is fixed with the core rod 25. The output end of the inner mold movement motor 21 drives the screw rod 220 to rotate, the rotation of the screw rod 220 can drive the core rod fixing piece 27 to rotate, and the rotation of the core rod fixing piece 27 can drive the core rod 25 fixed on the core rod fixing piece to rotate. A second fixed disk center hole 241 is formed at the center of the second fixed disk 24, fan-shaped protrusions 243 are formed around the second fixed disk center hole 241, and second fixed disk grooves 242 are formed between the fan-shaped protrusions 243.

The core rod 25 is tapered as a whole, with one end larger and the other end smaller, and the larger end is fixed to the core rod holder 27. The mandrel 25 is provided with mandrel working slopes 25a, and the number of the mandrel working slopes 25a is 8. A plurality of inner mold mounting seats 29 are circumferentially distributed on the periphery of the core rod 25. Internal mold mount pad 29 one side is provided with internal mold mount pad inclined plane of operation 29a, the opposite side is for being the arc, be provided with the first recess 291 of internal mold mount pad, internal mold mount pad second recess 292, internal mold mount pad third recess 293 on it, the bottom of internal mold mount pad 29 is provided with the spacing arch 294 of internal mold mount pad, the spacing arch 294 of internal mold mount pad is arranged in second fixed disk recess 242 in the installation, when plug 25 up-motion, plug inclined plane of operation 25a contacts with internal mold mount pad inclined plane of operation 29a, make internal mold mount pad 29 outwards move, the direction of its motion is along the direction of second fixed disk recess 242. An elastic ring 210, specifically made of polyurethane, is sleeved in the third groove 293 of all the inner mold mounting seats. As the inner mold mount 29 moves outwardly, the elastic ring 210 is stretched. As the mandrel 25 moves downwardly, the resilient ring 210 contracts inwardly, moving the inner die mounting block 29 inwardly. I.e., the upward and downward movement of the mandrel 25, may cause the horizontal outward or inward movement of the inner mold mounting seat 29. The inner die mounting seats 29 are the same in number as the mandrel working inclined surfaces 25 a. And the working inclined planes 25a of the core rods are matched with the working inclined planes 29a of the inner die mounting seats one by one.

The inner molds 28 are fixed on the outer sides of the inner mold mounting seats 29, and the inner molds 28 correspond to the inner mold mounting seats 29 one by one. The cross section of the inner mold 28 is a fan-shaped cylinder, one side is provided with an inner mold forming protrusion 281, and the other side is provided with an inner mold fixing protrusion 282. During installation, the inner mold mounting protrusion 282 is inserted into the inner mold mounting seat first groove 291, and a bolt is screwed from the top end of the inner mold mounting seat 29 to fix the two.

The outer mold lifting mechanism 3 includes an outer mold lifting motor 31, a second fixing plate 32, and a third fixing plate 33. A guide post 34 is arranged between the second fixing plate 32 and the third fixing plate 33, one end of the guide post 34 is fixed with the third fixing plate 33, the other end passes through the second fixing plate 32, and the second fixing plate 32 can move up and down along the guide post 34. The second fixing plate 32 and the third fixing plate 33 are provided with through holes at opposite positions. The through hole of the second fixing plate 32 is fixedly provided with an outer die fixing seat lower limiting plate 39, and the through hole of the third fixing plate 33 is fixedly provided with an outer die downward-pressing inclined cylinder 35. The inner surface of the outer die downward pressing inclined cylinder 35 is inclined outwards and is contacted with the outer die fixing seat 36. The outer surface of the outer mold fixing seat 36 is inclined inwards; the inner side of the outer die fixing seat 36 and the outer die 37; the outer die 37 is provided with an outer die forming groove 371 matched with the inner die forming protrusion 281; the outer mold fixing seats 36 are connected through springs.

A signal detecting means fixing plate 311 is fixed on the second fixing plate 32, a plurality of signal detecting means 311 are vertically provided, and a first probe 310 is provided on the third fixing plate 33, and the signal detecting means 311 can detect the position of the first probe 310 for detecting the stroke of the third fixing plate 33 when the third fixing plate 33 moves up and down. The first probe 310 and the second probe 17 are both a metal sheet, and when passing through the signal detection device, the signal detection device will cause a signal change, thereby realizing detection.

An outer die limiting protrusion 372 is arranged on one side of the outer die forming groove 371 on the outer die 37. The top of the outer mold 37 is fixedly provided with a bolt. An outer-mold upper limiting plate 38 is arranged above the outer mold 37. An upper limiting hole 381 is formed in the upper limiting plate 38 of the outer die fixing seat. The top of the outer mold 37 is provided with a bolt which can move in the upper limit hole 381. The outer molds 37 are the same number as the inner molds 28.

The outer mold fixing seat 36 is integrally in a step shape with an outward and inward inclined side, and the section is in a fan shape. Spring mounting grooves 362 are formed in both ends of the outer mold fixing seat 36, and springs 314 are arranged in the spring mounting grooves 362. The inner side of the outer mold fixing seat 36 is provided with an outer mold limiting groove 361. A limiting block fixing groove 363 is arranged on the bottom surface of the outer mold fixing seat 36. A T-shaped stopper 313 is fixed in the stopper fixing groove 363. The lower limiting plate 39 of the outer mold fixing seat is provided with a lower limiting groove 391 communicated with the outside. One end of the T-shaped stopper 313 is located in the lower stopper groove 391 and moves along the lower stopper groove 391.

The output end of the outer mold lifting motor 31 is connected with a lifting screw 315, and the number of the outer mold lifting motors 31 is two, and the two outer mold lifting motors are respectively positioned at the positions close to the two side edges of the second fixing plate 32. One end of the lifting screw 315 is engaged with the thread on the third fixing plate 33 and passes through the second fixing plate 32, and the other end is connected to the output end of the outer mold lifting motor 31. The rotation of the lifting screw 315 drives the third fixing plate 33 to move up and down. And a protective shell is arranged at the joint of the lifting screw 315 and the third fixing plate 33.

The movement process of the whole shaping device is as follows:

the outer mold lifting motor 31 in the outer mold lifting mechanism 3 operates to move the third fixing plate 33 downward. And at the same time, the outer mold down-tilting cylinder 35 fixed to the third fixing plate 33 is moved downward, and the inner surface of the outer mold down-tilting cylinder 35 is inclined and provided with a spiral groove. The downward movement of the workpiece can drive the outer die fixing seat 36 contacted with the inner surface to move inwards along the lower limiting groove 391, and simultaneously drive the inner die 37 fixed with the outer die fixing seat 36 to contract inwards, and stop when the diameter is set, and then the blank of the workpiece 4 is placed between the inner die 28 and the outer die 37, and at this time, a gap is formed between the inner die 28 and the outer die 37.

The inner mold moving motor 21 in the inner mold moving mechanism 2 drives the screw rod 220 to rotate, further drives the mandrel fixing member 27 to rotate, and can realize the lifting of the mandrel fixing member 27, drive the mandrel working inclined plane 25a of the upward moving mandrel 25 of the mandrel 25 fixed with the mandrel fixing member to contact with the inner mold mounting seat working inclined plane 29a, and extrude the inner mold mounting seat 29 outwards, so that the inner mold mounting seat expands outwards along the second fixing disk groove 242, and the inner mold mounting seat 28 fixed with the inner mold mounting seat expands outwards. The inner mold forming protrusion 281 of the inner mold 28 is fitted with the outer mold forming groove 371 to form the work 4 inserted therein. Since the inner molds 28 have 8 lobes and have a gap between adjacent inner molds 28 after being expanded outward, defects may be generated during molding.

At this time, the inner mold movement motor 21 rotates reversely, so that the mandrel 25 moves downward and is separated from the inner mold mounting seat 29, the elastic ring 210 positioned outside the inner mold mounting seat 29 contracts, so that the inner mold mounting seat 29 contracts inward, so that the inner mold 28 is separated from the workpiece 4, at this time, the slewing mechanism 1 works, so that the first fixed disk 22 rotates by a set angle, the mandrel 25 is lifted, and the inner mold 28 and the outer mold 37 are closed again. The forming process is repeated for 3-5 times, each time the inner die 28 is opened with a different diameter, and the product is formed by multiple forming.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A hump shaping device for a large-diameter thin-wall cylinder is characterized by comprising a swing mechanism (1), an internal mold movement mechanism (2) and an external mold lifting mechanism (3);

the rotary mechanism (1) comprises a rotary motor (11), an external gear (13), a rotary motor fixing plate (12), an internal gear (14), an internal gear limiting ring (15) and a first fixing plate (16); the rotary motor (11) is fixed on the rotary motor fixing plate (12) and drives the external gear (13) to rotate, and the external gear (13) and the internal gear (14) are in meshing transmission; the rotary motor fixing plate (12) is fixed with an internal gear limiting ring (15), and the internal gear limiting ring (15) is fixed with a first fixing plate (16);

the inner mold movement mechanism (2) comprises an inner mold movement motor (21), a first fixed disk (22), a second fixed disk (24), a third fixed disk (26) and a core rod (25); the first fixed disc (22) is fixed with the internal gear (14), and a connecting rod (23) is arranged among the first fixed disc (22), the second fixed disc (24) and the third fixed disc (26); the output end of the inner mold movement motor (21) is connected with a screw rod (220), and the screw rod (220) is connected with a mandrel fixing piece (27) through threads; the end part of the mandrel fixing piece (27) is fixed with the mandrel (25);

a mandrel working inclined plane (25a) is arranged on the mandrel (25); a plurality of inner die mounting seats (29) are circumferentially distributed on the periphery of the core rod (25); the core rod (25) moves up and down to drive the inner die mounting seat (29) to move horizontally outwards or inwards; an inner die (28) is fixed on the outer side of the inner die mounting seat (29), and an inner die forming bulge (281) is arranged on the inner die (28); an elastic ring (210) is arranged on the inner die mounting seat (29);

the outer die lifting mechanism (3) comprises an outer die lifting motor (31), a second fixing plate (32) and a third fixing plate (33); a guide post (34) is arranged between the second fixing plate (32) and the third fixing plate (33), one end of the guide post (34) is fixed with the third fixing plate (33), and the other end of the guide post passes through the second fixing plate (32); through holes are formed in the opposite positions of the second fixing plate (32) and the third fixing plate (33); an outer die fixing seat lower limiting plate (39) is fixedly arranged at a through hole of the second fixing plate (32), and an outer die pressing inclined barrel (35) is fixedly arranged at a through hole of the third fixing plate (33); the inner surface of the outer die downward pressing inclined cylinder (35) is inclined outwards and is contacted with an outer die fixed seat (36); the outer surface of the outer mold fixing seat (36) is inwards inclined; the inner side of the outer die fixing seat (36) is fixed with the outer die (37); the outer die (37) is provided with an outer die forming groove (371) matched with the inner die forming bulge (281); the outer die fixing seats (36) are connected through springs.

2. The hump shaping device for the large-caliber thin-wall cylinder according to claim 1, wherein a second fixing disc center hole (241) is formed in the center of the second fixing disc (24), fan-shaped protrusions (243) are formed around the second fixing disc center hole (241), and second fixing disc grooves (242) are formed between the fan-shaped protrusions (243).

3. The hump shaping device of a large-caliber thin-wall cylinder as claimed in claim 1, wherein the cross section of the inner die (28) is a sector cylinder, one side of the inner die is provided with an inner die forming bulge (281), and the other side of the inner die is provided with an inner die fixing bulge (282).

4. The hump shaping device for large-caliber thin-walled cylinders according to claim 1, wherein one side of the internal mold mounting seat (29) is provided with an internal mold mounting seat working inclined plane (29a), the other side is arc-shaped, and a first internal mold mounting seat groove (291), a second internal mold mounting seat groove (292) and a third internal mold mounting seat groove (293) are formed in the internal mold mounting seat.

5. The hump shaping device for the large-caliber thin-wall cylinder according to claim 1, wherein one side of the outer die (37) opposite to the outer die forming groove (371) is provided with an outer die limiting protrusion (372); the top of the outer die (37) is fixedly provided with a bolt; an outer die upper limiting plate (38) is arranged above the outer die (37); an upper limiting hole (381) is formed in the outer die upper limiting plate (38); the top of the outer die (37) is provided with a bolt which can move in the upper limit hole (381).

6. The hump shaping device for the large-caliber thin-wall cylinder according to claim 1, wherein the outer die fixing seat (36) is integrally in a step shape with an outward side and an inward inclination, and the cross section is in a fan shape; spring mounting grooves (362) are formed in two ends of the outer die fixing seat (36), and springs (314) are arranged in the spring mounting grooves (362); an outer die limiting groove (361) is formed in the inner side of the outer die fixing seat (36); a limiting block fixing groove (363) is formed in the bottom surface of the outer mold fixing seat (36); a T-shaped limit block (313) is fixed in the limit block fixing groove (363); the lower limiting plate (39) of the outer die fixing seat is provided with a lower limiting groove (391) communicated with the outside; one end of the T-shaped limiting block (313) is positioned in the lower limiting groove (391) and moves along the lower limiting groove (391).