A ring-shaped forging die assembly

Abstract

This utility model provides a forging die assembly for ring-shaped forgings, belonging to the field of forging die technology. It includes a lower die base and an upper die. The lower die base is a split structure, with the upper die located above it. A floating centering mandrel is vertically mounted at the center of the lower die base. A welded guide cone is coaxially positioned at the lower end of the upper die. During die closing, the top of the floating centering mandrel aligns with the cone surface of the welded guide cone. A stacked heavy-duty disc spring bearing assembly is provided between the lower part of the floating centering mandrel and the lower die base. This heavy-duty disc spring bearing assembly adapts to the radial displacement of the floating centering mandrel. The floating centering mandrel, welded guide cone, and heavy-duty disc spring bearing assembly achieve centering and die closing of the ring-shaped forgings through the alignment of their cone surfaces, ensuring forming accuracy. The lower die base is easy to assemble and disassemble, facilitating die maintenance. The disc spring assembly adapts to the radial offset of the mandrel, preventing forgings from developing shape and dimensional defects due to die closing deviations.

Description

Technical Field

[0001] This utility model belongs to the field of forging die technology, and in particular to a forging die assembly for ring-shaped forgings. Background Technology

[0002] The ring forging die assembly is a special tooling structure used for forging and forming ring forgings. Its advantages include stable structure, reliable positioning, high forming regularity, and applicability to industrial fields such as heavy machinery and pressure vessel ring forging.

[0003] Currently, conventional ring-shaped forging dies typically employ rigid fixing for mold closing, alignment, and centering operations. This method suffers from poor coaxial alignment and adaptability to various working conditions, failing to meet the radial displacement adjustment requirements of the mandrel during forging. This can easily lead to mold closing misalignment and forging dimensional deviations, making it difficult to guarantee the processing qualification rate of ring-shaped forgings. Therefore, we propose a ring-shaped forging die assembly to address these issues. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model provides a forging die assembly for ring-shaped forgings, which solves the problems in the prior art where forging dies use rigid positioning, have insufficient coaxial alignment adaptability, cannot adapt to mandrel radial displacement adjustment, and are prone to die closing misalignment, forging dimensional deviations, and reduced processing pass rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A forging die assembly for ring-shaped forgings includes a lower die base and an upper die. The lower die base is a split structure, and the upper die is located above the lower die base. A floating centering mandrel is vertically mounted at the center of the lower die base. A welded guide cone is coaxially provided at the lower end of the upper die. When the die is closed, the top end of the floating centering mandrel and the cone surface of the welded guide cone are aligned and engaged. A stacked heavy-duty disc spring bearing assembly is provided between the lower part of the floating centering mandrel and the lower die base.

[0006] In a further embodiment, the bottom end of the floating centering mandrel is integrally formed with a circular ball head, and a corresponding support seat is provided inside the lower mold base. The support seat is integrally formed with a concave ball socket, and the concave ball socket is configured to cooperate with the circular ball head.

[0007] In a further embodiment, the lower mold base is provided with an annular mold cavity, and the edge of the annular mold cavity is uniformly provided with multiple sets of stepped anti-misalignment positioning blocks along the circumferential direction; the top of the multiple sets of anti-misalignment positioning blocks is provided with a guide slope that is higher on the outside and lower on the inside, and the bottom is provided with a radial limiting stepped stop.

[0008] In a further embodiment, a slag discharge chute is provided on the lower mold base between adjacent anti-misalignment positioning blocks. The slag discharge chute is a steeply inclined chute structure with a higher inner surface and a lower outer surface, and the slag discharge chute is connected to the outer edge of the lower mold base.

[0009] In a further embodiment, the guide slope of the anti-misalignment positioning block is provided with an insert groove, and a wear-resistant guide plate is embedded in the insert groove, and the wear-resistant guide plate is fitted and limited to the insert groove.

[0010] In a further embodiment, the heavy-duty disc spring bearing assembly is composed of multiple stacked disc springs. The heavy-duty disc spring bearing assembly is sleeved on the lower outer side of the floating centering mandrel, and a gap is left between it and the outer wall of the floating centering mandrel. A dustproof ring is provided on the outer side of the heavy-duty disc spring bearing assembly.

[0011] In a further embodiment, a dust collection groove is provided on the top of the floating centering mandrel, and the dust collection groove has a shallow annular structure.

[0012] In a further embodiment, multiple sets of limiting stop pins are installed on the lower mold base. These multiple sets of limiting stop pins are arranged on the outer periphery of the floating centering mandrel and limit its maximum radial swing amplitude.

[0013] In a further embodiment, an exhaust groove is provided on the outer periphery of the annular mold cavity between adjacent anti-misalignment positioning blocks. The exhaust groove is a shallow, horn-shaped groove with a depth less than that of the slag discharge chute. The exhaust groove extends radially, with longitudinal diversion ribs arranged in the middle section along the airflow direction, and its outer side is connected to the slag discharge chute.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model device, by incorporating a floating centering mandrel, a welded guide cone, and a heavy-duty disc spring bearing assembly, utilizes the conical surface alignment of the floating centering mandrel and the welded guide cone, as well as the structural characteristics of the heavy-duty disc spring bearing assembly adapting to the radial displacement of the mandrel. This allows for centering and mold closing during the forging of ring-shaped forgings, ensuring the forging accuracy. Furthermore, the lower mold base is easy to disassemble and reassemble, facilitating mold maintenance and repair. At this time, the heavy-duty disc spring bearing assembly, using a stacked combination structure, can adapt to the radial positional offset of the floating centering mandrel during operation, avoiding deviations in mold closing alignment and preventing shape and dimensional defects in the ring-shaped forgings.

[0015] 2. Meanwhile, this utility model achieves precise mold alignment, rapid waste discharge, wear-resistant mold body, and smooth venting of the forging cavity through the spherical fit and support of the circular ball head and the concave ball socket, the guiding and limiting of the anti-misalignment positioning block and the assembly error prevention, the large-angle slag discharge chute, the wear-resistant protection of the wear-resistant guide plate, the swing range constraint of the limit stop pin, the exhaust channel with the diversion rib for exhaust guidance, and the dustproof ring and dust collection groove for dustproof storage structure. This further improves the stability of forging processing, the service life of the mold and the qualification rate of the forging finished product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembled structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 yes Figure 2 Enlarged view of region A in the middle; Figure 4 This is a top view of the present invention; Figure 5 This is a cross-sectional view of the present invention; Figure 6 This is a schematic diagram of the structure of the lower mold base of this utility model; Figure 7 yes Figure 6 A magnified view of region B in the middle.

[0017] In the diagram, the correspondence between component names and drawing numbers is as follows: 11. Lower mold base; 12. Upper mold; 13. Floating centering mandrel; 14. Welded guide cone; 15. Heavy-duty disc spring bearing assembly; 16. Circular ball head; 17. Support seat; 18. Concave ball socket; 19. Annular mold cavity; 21. Anti-misalignment positioning block; 22. Guide slope; 23. Radial limiting stepped stop; 24. Slag discharge chute; 25. Insertion groove; 26. Wear-resistant guide plate; 27. Dustproof ring; 28. Dust collection groove; 29. ​​Limiting stop pin; 31. Exhaust groove; 32. Longitudinal diversion rib. Detailed Implementation

[0018] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0019] Example:

[0020] Please see Figure 1-7In this utility model, a forging die assembly for ring-shaped forgings includes a lower die base 11 and an upper die 12. The lower die base 11 adopts a split assembly structure, which is composed of left-right or upper-lower split modules joined together. The split structure can reduce the processing difficulty of the core cavity and internal components, and at the same time facilitate the disassembly, maintenance and replacement of internal components such as the floating centering mandrel 13 and the heavy-duty disc spring bearing assembly 15. The lower die base 11 is made of high heat-strength hot work die steel, which is tempered and surface hardened, and has excellent high temperature resistance, high pressure resistance and thermal fatigue resistance, and can be adapted to the high temperature hot forging conditions of ring-shaped forgings for a long time. The upper die 12 is coaxially arranged directly above the lower die base 11. The bottom parting surface of the upper die 12 mates with the top parting surface of the lower die base 11. When the die is closed, the upper die 12 and the lower die base 11 are completely closed, forming a complete ring-shaped forging cavity with accurate dimensions and regular contour, ensuring the forming accuracy of the outer wall and end face of the forging. A floating centering mandrel 13 is vertically installed at the center of the lower die base 11. The floating centering mandrel 13 is made of high-rigidity alloy mold steel. As the core component for the inner hole forming and radial positioning of the ring-shaped forging, its outer wall is adapted to the inner hole cavity of the forging. It can achieve vertical floating displacement during the die-closed forging process, and at the same time has the ability to adapt to small radial displacement, which can match the stress deformation and coaxiality adaptive adjustment requirements of the forging during forging. The upper mold 12 is coaxially equipped with a weld overlay guide cone 14 at its lower end. The weld overlay guide cone 14 is formed by a cobalt-based hard alloy wear-resistant weld overlay process. The weld overlay layer is uniform and dense, with a surface hardness of HRC60 or higher. It has outstanding wear resistance and high temperature stability. The cone surface is finely ground and polished, ensuring smooth guidance without jamming. During the mold closing process, the top of the floating centering mandrel 13 and the cone surface of the weld overlay guide cone 14 are aligned and matched with each other. Through the self-locking guide principle of the cone surface, the upper mold 12 and the lower mold base 11 are forced to maintain a coaxial mold closing state, which avoids problems such as mold closing deviation and misalignment from the source and eliminates forming defects such as misalignment and uneven wall thickness in the forging.

[0021] like Figure 2 , Figure 3 , Figure 5As shown, a stacked heavy-duty disc spring bearing assembly 15 is provided between the lower part of the floating centering mandrel 13 and the lower mold base 11. The heavy-duty disc spring bearing assembly 15 is composed of multiple high-strength alloy disc springs coaxially stacked. The disc springs are subjected to high-temperature shaping treatment, and their mechanical properties are stable at high temperatures. The entire assembly is sleeved on the outer side of the lower part of the floating centering mandrel 13, and a uniform annular gap is reserved between it and the outer wall of the floating centering mandrel 13. This gap is specifically used to match the radial displacement space of the floating centering mandrel 13, ensuring that the heavy-duty disc spring bearing assembly 15 does not interfere with the reasonable radial movement of the floating centering mandrel 13. The core function of the heavy-duty disc spring bearing assembly 15 is to provide vertical support for the floating centering mandrel 13. The bearing support bears the axial forging pressure during the forging process and is fully compatible with the radial displacement requirements of the floating centering mandrel 13, ensuring that the mandrel displacement and the bearing support do not interfere with each other. The heavy-duty disc spring bearing assembly 15 is equipped with a dustproof ring 27 on the outside. The dustproof ring 27 is made of heat-resistant metal and is tightly installed inside the lower die base 11 and on the outer periphery of the heavy-duty disc spring bearing assembly 15. It can prevent impurities such as oxide scale, metal chips, and dust generated during the forging process from entering the interior of the heavy-duty disc spring bearing assembly 15, avoiding impurities from clogging the disc spring stacking gap, ensuring that the heavy-duty disc spring bearing assembly 15 always maintains a stable working state, and maintaining the stability and reliability of the vertical support.

[0022] The bottom end of the floating centering mandrel 13 is integrally formed with a circular ball head 16. The circular ball head 16 and the floating centering mandrel 13 are integrally forged structures. The spherical surface is precision ground, resulting in a high surface finish and roundness. A corresponding support seat 17 is provided inside the lower die base 11. The support seat 17 is made of high-strength wear-resistant material and is fixed to the center bottom of the lower die base 11 by interference fit or bolt fastening. The support seat 17 is integrally formed with a concave ball socket 18. The spherical curvature and size of the concave ball socket 18 are adapted to the circular ball head 16, and the spherical surface is also precision ground and polished. The circular ball head 16 and the concave ball socket 18 form a spherical pair fit structure. The two can work together with the floating centering mandrel 13 to achieve omnidirectional radial adaptive displacement, ensuring that the floating centering mandrel 13 always maintains a coaxial positioning state under the combined action of forging axial pressure and radial lateral force, thereby improving the roundness and coaxiality of the inner hole of the ring forging.

[0023] The top of the floating centering mandrel 13 is provided with a dust collection groove 28. The dust collection groove 28 is a shallow annular structure. The width and depth of the annular groove are standardized. This not only does not affect the accuracy of the conical surface mating between the top of the floating centering mandrel 13 and the welded guide cone 14, but also collects a small amount of oxide scale and dust that falls to the top of the mandrel during the forging process. This prevents impurities from accumulating on the mating surface of the top of the mandrel, ensuring the mold closing alignment accuracy between the floating centering mandrel 13 and the welded guide cone 14, and preventing impurities from causing mating jamming or mold closing deviation. Multiple sets of limiting stop pins 29 are installed on the lower die base 11. The multiple sets of limiting stop pins 29 are made of heat-resistant alloy steel and are evenly distributed around the outer periphery of the floating centering mandrel 13. A set radial gap is reserved between the top of the limiting stop pin 29 and the outer wall of the floating centering mandrel 13 to limit the maximum radial swing amplitude of the floating centering mandrel 13, and to prevent the floating centering mandrel 13 from generating excessive radial displacement due to excessive force, thereby preventing quality problems such as eccentricity of the inner hole of the forging and out-of-tolerance dimensions.

[0024] like Figure 2 , Figures 5 to 7 As shown, the lower die base 11 is provided with an annular die cavity 19. The annular die cavity 19 is a special cavity for forming the outer contour of ring-shaped forgings. The cavity dimensions, fillets, and wall thickness are all machined according to the precision of the forging drawings, and the surface is polished to ensure that the outer wall of the forging is smooth and the dimensions are accurate. Multiple sets of stepped anti-misalignment positioning blocks 21 are evenly provided along the circumferential direction of the edge of the annular die cavity 19. The anti-misalignment positioning blocks 21 are stepped three-dimensional structures. The even distribution around the circumference can ensure that the forging blank is subjected to uniform force. The stepped structure can realize bidirectional positioning of the blank, which can quickly find the correct placement position of the blank and prevent the blank from being placed in reverse or misaligned, thus avoiding the problem of blank placement from the root. Errors leading to scrapped forgings; multiple sets of error-proof positioning blocks 21 are equipped with guide slopes 22 with higher outer sides and lower inner sides at the top. The inclination angle of the guide slopes 22 is adapted to the curvature of the outer diameter of the blank, which can guide the ring-shaped forging blank to slide automatically, smoothly and quickly into the designated forming position in the annular die cavity 19 without manual alignment; the bottom of the error-proof positioning block 21 is equipped with a radial limiting stepped stop 23. The radial limiting stepped stop 23 is an inwardly protruding stepped stop structure that is adapted to the outer diameter of the bottom end of the blank, which can form an all-round radial limit on the bottom of the blank, preventing the blank from radially moving due to the forging pressure during the forging process, and ensuring that the forming position of the blank is always fixed.

[0025] The guide slope 22 of the error-proof positioning block 21 has an inlay groove 25 on its inner side. The inlay groove 25 is a closed groove, and its size and depth are perfectly matched with the wear-resistant guide plate 26. The wear-resistant guide plate 26 is embedded in the inlay groove 25. The wear-resistant guide plate 26 is made of high-hardness wear-resistant alloy material. The plate body is completely fitted and limited to the inner wall of the inlay groove 25, without looseness, warping, or gaps. The wear-resistant guide plate 26 can directly replace the guide slope 22 in contact with the blank, reducing the friction and wear of the error-proof positioning block 21 when the blank slides, extending the service life of the error-proof positioning block 21, and keeping the guide slope 22 smooth for a long time, ensuring smooth blank entry and accurate positioning.

[0026] A slag discharge chute 24 is provided on the lower die base 11 between adjacent anti-misalignment positioning blocks 21. The slag discharge chute 24 is a large-slope groove structure with a high inner slope and a low outer slope. The slope angle ensures that impurities can automatically slide outward under the action of gravity and forging impact force. The slag discharge chute 24 is connected to the outer edge of the lower die base 11. Impurities such as oxide scale, metal chips, and waste generated during forging can be automatically discharged outward along the large-slope groove to the outside of the die, and will not accumulate inside the annular die cavity 19, thus avoiding impurities being pressed into the surface of the forging and causing forming defects, and ensuring the surface quality of the forging.

[0027] An exhaust groove 31 is provided on the outer periphery of the annular die cavity 19 between adjacent anti-misalignment positioning blocks 21. The exhaust groove 31 is a shallow, flared groove structure, which gradually widens from the inside to the outside. The depth of the groove is less than the depth of the slag discharge chute 24, which ensures smooth exhaust and prevents the forming accuracy of the annular die cavity 19 from being affected by excessive groove depth. The exhaust groove 31 extends radially, which can quickly discharge the high-temperature compressed gas inside the annular die cavity 19 and avoid the accumulation of gas pressure in the die cavity, which can lead to defects such as porosity and air holes in the forging. The middle section of the exhaust groove 31 is provided with a longitudinal diversion rib 32 along the airflow direction. The longitudinal diversion rib 32 is set along the exhaust airflow direction, which can divert and guide the high-speed airflow, avoid airflow turbulence and backflow, and further improve the exhaust smoothness. The outer side of the exhaust groove 31 is connected to the slag discharge chute 24. The high-temperature gas discharged from the die cavity can directly flow into the slag discharge chute 24 and be discharged outside the die along with impurities, realizing the integrated and coordinated operation of exhaust and slag discharge.

[0028] The working principle of this utility model is as follows: The assembly process is as follows: Assemble the individual components of the lower mold base 11 by connecting and fixing them together; fix the support base 17 in the center of the lower mold base 11, ensuring the concave ball socket 18 is coaxial and centered; embed the circular ball head 16 at the bottom of the floating centering mandrel 13 into the concave ball socket 18 of the support base 17 to form a spherical mating structure; assemble multiple disc springs into a heavy-duty disc spring bearing assembly 15, and fit it onto the lower outer side of the floating centering mandrel 13, adjusting its position to maintain a uniform gap between the heavy-duty disc spring bearing assembly 15 and the outer wall of the floating centering mandrel 13; install a dustproof retaining ring 27 on the outside of the heavy-duty disc spring bearing assembly 15 to complete the dustproof sealing assembly; evenly install multiple sets of limiting stop pins 29 on the lower mold base 11 and the outer periphery of the floating centering mandrel 13, calibrating the position of the limiting stop pins 29 to limit the maximum radial swing amplitude of the floating centering mandrel 13; on the lower mold base 11… A ring-shaped die cavity 19 is machined and formed. Multiple sets of stepped anti-misalignment positioning blocks 21 are evenly fixed to the edge of the ring-shaped die cavity 19. A guide slope 22 with an outer higher shape and an inner lower shape is machined on the top of the anti-misalignment positioning block 21, and a radial limiting stepped stop 23 is machined on the bottom. A wear-resistant guide plate 26 is embedded in the insertion groove 25 on the inner side of the guide slope 22 to ensure that the wear-resistant guide plate 26 fits and limits the insertion of the insertion groove 25. An inner higher shape and an outer lower shape are machined between adjacent anti-misalignment positioning blocks 21 on the lower die base 11. The slag discharge chute 24 is connected to the outer edge of the lower mold base 11; a trumpet-shaped exhaust groove 31 is machined between adjacent anti-misalignment positioning blocks 21 on the outer periphery of the annular mold cavity 19, and a longitudinal diversion rib 32 is machined in the middle section of the exhaust groove 31 to connect the outer side of the exhaust groove 31 with the slag discharge chute 24; the weld overlay guide cone 14 is coaxially fixed to the lower end of the upper mold 12, the alignment accuracy of the weld overlay guide cone 14 and the floating centering mandrel 13 is calibrated, and the whole machine assembly is completed.

[0029] The operating procedure is as follows: Install the mold assembly on the forging equipment workbench and calibrate the coaxiality of the lower mold base 11 and the upper mold 12; place the ring-shaped forging blank along the guide slope 22 of the anti-misalignment positioning block 21, and the blank slides down along the guide slope 22 into the annular mold cavity 19. The radial limiting stepped stop 23 radially limits the bottom of the blank, and multiple sets of anti-misalignment positioning blocks 21 realize the anti-misalignment positioning of the blank; start the forging equipment, the upper mold 12 closes downward, and the welded guide cone 14 aligns with the top cone surface of the floating centering mandrel 13 to realize mold closing; during the forging process, the floating centering mandrel 13 is subjected to force to generate vertical floating and radial displacement, and the circular ball head 16 The heavy-duty disc spring bearing assembly 15 adapts to the radial displacement of the floating centering mandrel 13, and the limiting stop pin 29 restricts its maximum radial swing amplitude. The high-temperature gas in the annular die cavity 19 is discharged along the trumpet-shaped exhaust groove 31, and the longitudinal diversion rib 32 diverts and guides the airflow. The gas flows into the slag discharge chute 24 through the exhaust groove 31 and is discharged. The oxide scale and debris generated during forging are automatically discharged outside the die along the slag discharge chute 24, which is higher inside and lower outside. A small amount of impurities are collected by the dust collection groove 28 on the top of the floating centering mandrel 13. After forging is completed, the upper die 12 moves upward to open the die, and the formed ring-shaped forging is taken out, completing a single forging operation.

[0030] The maintenance process is as follows: Regularly clean the residual oxide scale and impurities in the annular mold cavity 19, slag discharge chute 24, and venting groove 31 to ensure unobstructed slag discharge and venting channels; inspect the wear-resistant guide plate 26 of the anti-misalignment positioning block 21 to confirm that the wear-resistant guide plate 26 is free from wear, loosening, or detachment, and that the insert groove 25 is free from deformation. Replace the wear-resistant guide plate 26 promptly if its wear exceeds the limit; inspect the circular ball head 16 of the floating centering mandrel 13 and the concave ball socket 18 of the support seat 17 to confirm that the spherical surfaces fit smoothly without jamming, and clean impurities from the spherical surfaces; inspect the heavy-duty disc spring bearing assembly 15 to confirm that it has multiple The laminated disc springs are free from deformation and jamming; the dustproof retaining ring 27 is undamaged and provides good dustproof performance; the limit stop pin 29 is checked for looseness and deformation, ensuring the radial limiting accuracy of the floating centering mandrel 13; the welded guide cone 14 is checked for wear and chipping, and its alignment with the floating centering mandrel 13 is accurate; impurities in the dust collection groove 28 at the top of the floating centering mandrel 13 are cleaned to keep the shallow annular groove clean; the connection tightness of the split structure of the lower die base 11 is checked regularly to ensure the overall structure of the die is stable and to guarantee the accuracy and stability of continuous forging operations of ring forgings.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A forging die assembly for ring-shaped forgings, comprising a lower die base (11) and an upper die (12), characterized in that: The lower mold base (11) is a split structure, and the upper mold (12) is located above the lower mold base (11). A floating centering mandrel (13) is vertically installed at the center of the lower mold base (11). A welded guide cone (14) is coaxially provided at the lower end of the upper mold (12). When the mold is closed, the top of the floating centering mandrel (13) and the cone surface of the welded guide cone (14) are aligned and engaged with each other. A stacked heavy-duty disc spring bearing assembly (15) is provided between the lower part of the floating centering mandrel (13) and the lower mold base (11).

2. The forging die assembly for ring-shaped forgings according to claim 1, characterized in that: The bottom end of the floating centering mandrel (13) is integrally formed with a circular ball head (16), and the lower mold base (11) is provided with a corresponding support seat (17). The support seat (17) is integrally formed with a concave ball socket (18), and the concave ball socket (18) is matched with the circular ball head (16).

3. The forging die assembly for ring-shaped forgings according to claim 1, characterized in that: The lower mold base (11) is provided with an annular mold cavity (19), and the annular mold cavity (19) is provided with multiple sets of stepped anti-misalignment positioning blocks (21) evenly distributed along the circumferential direction; the top of the multiple sets of anti-misalignment positioning blocks (21) is provided with a guide slope (22) that is higher on the outside and lower on the inside, and the bottom is provided with a radial limiting stepped stop (23).

4. The forging die assembly for ring-shaped forgings according to claim 3, characterized in that: A slag discharge chute (24) is provided on the lower mold base (11) between adjacent anti-misalignment positioning blocks (21). The slag discharge chute (24) is a large-slope chute structure with a high inner slope and a low outer slope, and the slag discharge chute (24) is connected to the outer edge of the lower mold base (11).

5. A forging die assembly for ring-shaped forgings according to claim 3, characterized in that: The guide slope (22) of the anti-misalignment positioning block (21) has an insert groove (25) on the inner side, and a wear-resistant guide plate (26) is embedded in the insert groove (25). The wear-resistant guide plate (26) fits and limits the position of the insert groove (25).

6. The forging die assembly for ring-shaped forgings according to claim 1, characterized in that: The heavy-duty disc spring bearing assembly (15) is composed of multiple disc springs stacked together. The heavy-duty disc spring bearing assembly (15) is sleeved on the lower outer side of the floating centering spindle (13) and has a gap with the outer wall of the floating centering spindle (13). A dustproof ring (27) is provided on the outer side of the heavy-duty disc spring bearing assembly (15).

7. A forging die assembly for ring-shaped forgings according to claim 6, characterized in that: The floating centering spindle (13) has a dust collection groove (28) on its top, and the dust collection groove (28) has a shallow annular structure.

8. The forging die assembly for ring-shaped forgings according to claim 1, characterized in that: Multiple sets of limiting stop pins (29) are installed on the lower mold base (11). The multiple sets of limiting stop pins (29) are arranged on the outer periphery of the floating centering mandrel (13) and limit its maximum radial swing amplitude.

9. A forging die assembly for ring-shaped forgings according to claim 4, characterized in that: The annular mold cavity (19) has an exhaust groove (31) on its outer periphery between the adjacent anti-misalignment positioning blocks (21). The exhaust groove (31) is a horn-shaped shallow groove structure with a groove depth less than that of the slag discharge chute (24). The exhaust groove (31) extends radially, and the middle section is provided with longitudinal diversion ribs (32) along the airflow direction. The outer side is connected to the slag discharge chute (24).

Images