Rotary forging equipment for forming large-size variable-cross-section part

Abstract

Rotary forging equipment for forming large-size variable cross-section parts comprises a lathe bed, one side of the lathe bed is connected with a forging unit, the other side of the lathe bed is connected with a feeding mechanism, and the feeding mechanism and the forging unit are matched to achieve rotary forging. Two rows of roller retainers are arranged in the forging unit, and four mushroom heads are arranged in each of the two rows of roller retainers to realize synchronous movement; large-size variable cross-section parts can be machined, product forming is guaranteed, inherent defects of a welding process can be avoided, and the production efficiency of products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of progressive forming of pipe parts, and particularly to a rotary forging device for forming large-size variable cross-section parts. Background Art

[0002] Currently, the demand for large-size variable cross-section parts in civil, aerospace and other fields is increasing day by day, and their manufacturing processes need to take into account characteristics such as ultra-large size, quantification, and structural function integration. However, traditional manufacturing technologies face significant bottlenecks: the split welding forming process realizes the overall structure through multi-segment welding, which not only introduces the heat affected zone of the weld, resulting in material strength attenuation, residual stress concentration and airtightness defects, but also is difficult to meet the dimensional consistency requirements of larger-size variable cross-section parts; although cold spinning can achieve seam-free processing, it is limited by problems such as low material forming rate and difficult springback control, and has poor adaptability to large deformation processing of high-strength alloys, and is prone to uneven wall thickness or micro-cracks. In this context, the rotary forging process exhibits unique advantages. This technology realizes local continuous plastic deformation of metal materials through high-frequency radial compression, and can perform precision forming on high-strength low-plasticity alloys at room temperature, avoiding the inherent defects of the welding process.

[0003] Currently, the rotary forging devices used by manufacturers can only process diameters less than 100 mm. For example, the patent application with the name "A Rotary Forging Machine for the Outer Diameter of a Bar" (Publication No.: CN222058720U) and the patent application with the name "Rotary Forging Mechanism and Rotary Forging Processing Device for Thin-Walled Ultra-Long Variable-Diameter Metal Bars and Tubes" (Publication No.: CN105328100B). The rotary forging devices have small processing diameters and weak forging capabilities, and cannot effectively process large-size variable cross-section parts (diameter > 200 mm, length > 600 mm). Summary of the Invention

[0004] In order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a rotary forging device for forming large-size variable cross-section parts, which can realize the processing of large-size variable cross-section parts, ensure product forming, and can avoid the inherent defects of the welding process, and improve the production efficiency of products.

[0005] In order to achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] A rotary forging device for forming large-size variable cross-section parts includes a bed body 1. One side of the bed body 1 is connected to a forging unit 2, and the other side of the bed body 1 is connected to a feeding mechanism 3. The feeding mechanism 3 and the forging unit 2 cooperate to realize rotary forging.

[0007] The described forging unit 2 includes four forging dies 4 arranged to rotate around an axis. The forging die 4 has a stepped cross-sectional structure. One end of the outer surface of the forging die 4 abuts against the main mushroom head 5, and the other end abuts against the sub-mushroom head 10. On the outside of the main mushroom head 5, there is a large roller 6. The large roller 6 is assembled in the large roller cage 8. On the outside of the large roller 6, there is a large steel ring 7. The outside of the large steel ring 7 is connected to the large steel ring housing 9. The front end of the large steel ring housing 9 is connected to the large cover plate 15. The large steel ring housing 9 is fixedly connected to the front part of the box body 17. In front of the box body 17, there is a box body front cover 23. The box body front cover 23 is fixed to the box body 17 by screws. In front of the box body front cover 23, there is a front cover 24. The front cover 24 is connected to the box body front cover 23 by bolts. On the outside of the sub-mushroom head 10, there is a small roller 11. The small roller 11 is assembled in the small roller cage 13. On the outside of the small roller 11, there is a small steel ring 12. On the outside of the small steel ring 12, there is a small steel ring housing 14. The small steel ring 12 is fixed to the small steel ring housing 14. The small steel ring housing 14 is fixed to the tail of the box body 17 by interference fit.

[0008] Behind the main mushroom head 5, there is a large flower plate 28. In front of the main mushroom head 5, there is a flower plate cover 16. In front of the sub-mushroom head 10, there is a large flower plate 28, and behind it, there is a small flower plate 18. The large flower plate 28 is connected to the small flower plate 18 to achieve synchronous rotation. By the large flower plate 28 and the small flower plate 18 respectively restricting the degrees of freedom of the main mushroom head 5 and the sub-mushroom head 10, the forging die 4, the main mushroom head 5, and the sub-mushroom head 10 can only move radially. Behind the small flower plate 18, there is a thrust ball bearing 27. On the outside of the small flower plate 18, there is a deep groove ball bearing 26. On the outside of the deep groove ball bearing 26, there is a support ring 25. The outside of the support ring 25 is connected to the small steel ring housing 14, and the end of the support ring 25 abuts against the box body 17.

[0009] On the outside of the large flower plate 28, there is a belt pulley 19. The belt pulley 19 is connected to the large flower plate 28, and the belt pulley 19 is located between the large roller cage 8 and the small roller cage 13. Above the box body 17, there is a driving motor 21. The driving motor 21 is connected to the belt pulley 19 through a belt 22.

[0010] The feeding mechanism 3 includes a feeding base 36 fixed to the other side of the bed body 1. A guide rail 29 is installed on the feeding base 36. A feeding oil cylinder 30 is installed at the outer end of the guide rail 29. A slide block connecting block 31 is provided at the end of the feeding oil cylinder 30. The slide block connecting block 31 is connected to the slide block 32. Above the slide block 32, there is a feeding machine box 33. A clamping hydraulic cylinder 34 is connected inside the feeding machine box 33. A manipulator 35 is provided outside the feeding machine box 33. The manipulator 35 is connected to the clamping hydraulic cylinder 34.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. Since the forging die of the present invention adopts a stepped cross-sectional structure, it specifically solves the problems that the machining of large-sized variable cross-section parts increases the length and mass of the forging die. When the mass of the forging die exceeds the critical value, the centrifugal force cannot effectively overcome the self-weight of the forging die, easily resulting in the failure of forging die lifting and the asymmetry of the forging forces between the upper and lower forging dies. At the same time, the mechanical transition region formed by the stepped cross-sectional design can balance the forging force conduction paths of the upper and lower die cavities, eliminate the offset of the forging force vector caused by mass eccentric loading, and achieve high-precision vertical forging of large-sized forgings.

[0013] 2. Since the present invention adopts a combined structure of double mushroom heads and double roller cages, it can effectively avoid the problem of unbalanced force conduction symmetry in the mushroom head area that occurs in the traditional single mushroom head structure when the forging die is relatively long. By optimizing the force conduction path through the symmetrically arranged double mushroom head structure and cooperating with the balanced supporting effect of the double roller cages, it can significantly suppress the eccentric offset of the forging die caused by asymmetric force conduction, ensuring that the forging die always maintains a precise feeding direction horizontally downward during the long-stroke forging process, and completely solving the technical problem that traditional long-sized forging dies cannot achieve vertical and stable forging from the perspective of structural design.

[0014] 3. The rotary forging equipment developed by the present invention for large-sized variable cross-section parts innovatively constructs an efficient and coordinated feeding-rotary forging integrated device. Through the optimized multi-degree-of-freedom feeding mechanism, it can accurately drive large-sized variable cross-section parts to achieve stable axial feeding. Cooperating with the high-frequency reciprocating motion of the high-rigidity forging die, it breaks through the processing bottlenecks of the external shape features such as stepped shafts and external flanges of large-sized variable cross-section parts in the traditional processing method, and realizes the rapid forming of the external contour with millimeter-level accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the left view of the embodiment of the present invention.

[0016] Figure 2 is the top view of the embodiment of the present invention.

[0017] Figure 3 is the front view of the forging unit of the embodiment of the present invention.

[0018] Figure 4 is the left view of the forging unit of the embodiment of the present invention.

[0019] Figure 5 is the left sectional view of the forging unit of the embodiment of the present invention.

[0020] Figure 6 is the sectional view of the roller-mushroom head-forging die of the embodiment of the present invention.

[0021] Figure 7 is the structural diagram of the large flower plate and the small flower plate of the embodiment of the present invention.

[0022] Figure 8 It is a schematic structural diagram of the forging die in the embodiment of the present invention.

[0023] Figure 9 It is a left sectional view of the feeding mechanism in the embodiment of the present invention. Specific embodiments

[0024] The technical solution of the present invention will be further described below in conjunction with the embodiments and the drawings.

[0025] As Figure 1 、 Figure 2 shown, a rotary forging device for forming large-size variable cross-section parts includes a machine body 1, a forging unit 2 and a feeding mechanism 3; one side of the machine body 1 is connected to the forging unit 2 by bolts, and the other side of the machine body 1 is connected to the feeding mechanism 3 by bolts. The feeding mechanism 3 and the forging unit 2 cooperate to realize rotary forging.

[0026] As Figures 3 - 8 shown, the forging unit 2 includes four forging dies 4 arranged to rotate around the axis. The forging die 4 adopts a stepped cross-section structure. One end of the outer surface of the forging die 4 is in contact with the main mushroom head 5, and the other end is in contact with the sub-mushroom head 10; a large roller 6 is arranged outside the main mushroom head 5. The large roller 6 is assembled in the large roller cage 8. A large steel ring 7 is arranged outside the large roller 6. A large steel ring housing 9 is arranged outside the large steel ring 7. The large steel ring 7 is connected to the large steel ring housing 9 by a flat key. A large cover plate 15 is arranged at the front end of the large steel ring housing 9. The large cover plate 15 is connected to the large steel ring housing 9 by screws. The large steel ring housing 9 is fixedly connected to the front part of the box body 17 by key connection. A box body front cover 23 is arranged directly in front of the box body 17. The box body front cover 23 is fixed to the box body 17 by screws. A front cover 24 is arranged in front of the box body front cover 23. The front cover 24 is connected to the box body front cover 23 by bolts; a small roller 11 is arranged outside the sub-mushroom head 10. The small roller 11 is assembled in the small roller cage 13. A small steel ring 12 is arranged outside the small roller 11. A small steel ring housing 14 is arranged outside the small steel ring 12. The small steel ring 12 is fixed to the small steel ring housing 14 by a flat key. The small steel ring housing 14 is fixed to the tail of the box body 17 by interference fit.

[0027] A large flower disc 28 is arranged behind the main mushroom head 5, a flower disc cover plate 16 is arranged in front of the main mushroom head 5, a large flower disc 28 is arranged in front of the auxiliary mushroom head 10, and a small flower disc 18 is arranged behind the auxiliary mushroom head 10. The large flower disc 28 and the small flower disc 18 are connected by screws and can rotate synchronously. By respectively restricting the degrees of freedom of the main mushroom head 5 and the auxiliary mushroom head 10 through the large flower disc 28 and the small flower disc 18, the forging die 4, the main mushroom head 5 and the auxiliary mushroom head 10 can only move radially; a thrust ball bearing 27 is arranged behind the small flower disc 18, a deep groove ball bearing 26 is arranged outside the small flower disc 18, a support ring 25 is arranged outside the deep groove ball bearing 26, the outside of the support ring 25 is connected to the small steel ring housing 14, and the end of the support ring 25 is attached to the box body 17.

[0028] A belt pulley 19 is arranged outside the large flower disc 28. The belt pulley 19 is connected to the large flower disc 28 by a key, and the belt pulley 19 is located between the large roller cage 8 and the small roller cage 13; a motor base 20 is arranged above the box body 17, a driving motor 21 is installed above the motor base 20, and the driving motor 21 is connected to the belt pulley 19 by a belt 22; when the equipment is running, the driving motor 21 drives the belt pulley 19 to rotate clockwise around the axis, the belt pulley 19 drives the large flower disc 28 and the small flower disc 18 to rotate clockwise around the axis synchronously, and the forging die 4, the main mushroom head 5 and the auxiliary mushroom head 10 are driven to rotate clockwise passively around the axis under the constraint of the large flower disc 28 and the small flower disc 18. Under the action of centrifugal force, the main mushroom head 5 and the auxiliary mushroom head 10 respectively collide with the large rollers 6 and the small rollers 11 to generate a downward pressure in the radial direction. The main mushroom head 5 and the auxiliary mushroom head 10 transmit the downward pressure to the forging die 4, and the forging die 4 directly contacts the large-size variable cross-section part to perform high-frequency continuous forging on the large-size variable cross-section part.

[0029] As Figure 9As shown in the figure, the feeding mechanism 3 includes a feeding base 36 fixed on the other side of the bed 1. A guide rail 29 is installed on the feeding base 36. A feeding oil cylinder 30 is installed at the outer end of the guide rail 29. A slide block connecting block 31 is arranged at the end of the feeding oil cylinder 30. The slide block connecting block 31 is connected to the slide block 32 by screws. When the feeding oil cylinder 30 works, it pushes the slide block 32 to move forward. Above the slide block 32, there is a feeding machine box 33. Inside the feeding machine box 33, there is a clamping hydraulic cylinder 34. The clamping hydraulic cylinder 34 is fixed to the feeding machine box 33 by bolts. A manipulator 35 is arranged outside the feeding machine box 33. The manipulator 35 is connected to the clamping hydraulic cylinder 34. When machining large-size variable cross-section parts, the clamping hydraulic cylinder 34 controls the manipulator 35 to contract to clamp and fix the large-size variable cross-section parts. Then, the feeding oil cylinder 30 is started. The feeding oil cylinder 30 can drive the feeding machine box 33 and the slide block 32 to move along the guide rail 29 towards the forging unit 2. When the large-size variable cross-section parts approach the forging unit 2, the feeding mechanism 3 moves forward slowly to realize the forging of the large-size variable cross-section parts. After the forging is completed, the feeding mechanism 3 returns to the starting point driven by the feeding oil cylinder 30. The clamping hydraulic cylinder 34 controls the manipulator 35 to release, and the machining of the large-size variable cross-section parts is completed.

Claims

1. A rotary forging device for forming large-size variable-section parts, comprising a bed (1), characterized in that: One side of the bed (1) is connected to the forging unit (2), and the other side of the bed (1) is connected to the feeding mechanism (3). The feeding mechanism (3) and the forging unit (2) cooperate to realize rotary forging.

2. The rotary forging equipment according to claim 1, characterized in that: The forging unit (2) comprises four forging dies (4) arranged to rotate around an axis, the forging die (4) adopts a stepped cross-section structure, one end of the outer surface of the forging die (4) is in contact with the main mushroom head (5), and the other end is in contact with the auxiliary mushroom head (10); a large roller (6) is arranged on the outer side of the main mushroom head (5), the large roller (6) is assembled in a large roller retainer (8), a large steel ring (7) is arranged on the outer side of the large roller (6), the outer side of the large steel ring (7) is connected to a large steel ring shell (9), the front end of the large steel ring shell (9) is connected to a large cover plate (15), the large steel ring shell (9) is connected and fixed to the front part of a box body (17), and a large steel ring is arranged right in front of the box body (17). A box front cover (23) is provided, the box front cover (23) is fixed to the box (17) by screws, a front cover cover (24) is provided in front of the box front cover (23), and the front cover cover (24) is connected to the box front cover (23) by bolts; a small roller (11) is provided on the outside of the auxiliary mushroom head (10), the small roller (11) is assembled in the small roller retainer (13), a small steel ring (12) is provided on the outside of the small roller (11), a small steel ring shell (14) is provided on the outside of the small steel ring (12), the small steel ring (12) is connected to the small steel ring shell (14), and the small steel ring shell (14) is fixed to the rear of the box (17) by interference fit; A large faceplate (28) is arranged at the rear of the main mushroom head (5), a faceplate cover plate (16) is arranged at the front of the main mushroom head (5), a large faceplate (28) is arranged at the front of the auxiliary mushroom head (10), and a small faceplate (18) is arranged at the rear. The large faceplate (28) is connected to the small faceplate (18) to realize synchronous rotation. The large faceplate (28) and the small faceplate (18) respectively constrain the freedom of the main mushroom head (5) and the auxiliary mushroom head (10), so that the forging die (4), the main mushroom head (5) and the auxiliary mushroom head (10) can only move in the radial direction; a thrust ball bearing (27) is arranged at the rear of the small faceplate (18), a deep groove ball bearing (26) is arranged on the outer side of the small faceplate (18), a support ring (25) is arranged on the outer side of the deep groove ball bearing (26), the outer side of the support ring (25) is connected to the small steel ring shell (14), and the end of the support ring (25) is fitted with the box body (17); A pulley (19) is arranged on the outside of the large faceplate (28), the pulley (19) is connected to the large faceplate (28), and the pulley (19) is located between the large roller retainer (8) and the small roller retainer (13); a driving motor (21) is arranged above the box body (17), and the driving motor (21) is connected to the pulley (19) through a belt (22).

3. The rotary forging equipment according to claim 1, characterized in that: The feeding mechanism (3) comprises a feeding base (36) fixed on the other side of the bed (1), a guide rail (29) being installed on the feeding base (36), a feeding cylinder (30) being installed at the outer end of the guide rail (29), a slide connection block (31) being arranged at the end of the feeding cylinder (30), and the slide connection block (31) being connected to the slide (32); a feeding case (33) being arranged above the slide (32), a gripping hydraulic cylinder (34) being connected inside the feeding case (33), a manipulator (35) being arranged outside the feeding case (33), and the manipulator (35) being connected to the gripping hydraulic cylinder (34).

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