Cast-aluminum rotor riveting ring stamping device
By designing a stepped punch and a guide transition surface, efficient processing of the rivet ring was achieved, solving the problems of low connection strength and low processing efficiency in traditional methods, and improving the structural strength and production efficiency of the rivet ring.
Patent Information
- Application Number
- CN202423134426.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Traditional riveting ring processing methods result in low connection strength and low processing efficiency. Cold stamping requires multiple stamping processes, leading to excessively long production lines and high costs.
The punch and stamping surface are designed with a stepped structure, which can achieve the function of multiple stampings in one stamping. Combined with the guide transition surface, wear is reduced and positioning accuracy is improved.
It improves the structural strength and processing efficiency of the rivet ring, reduces the stamping process and production costs, and avoids the problems of long processing time and high cost caused by multiple stamping in traditional methods.
Smart Images
Figure CN223733625U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical engineering technology, and specifically relates to a stamping device for riveting rings of cast aluminum rotors. Background Technology
[0002] Riveting rings are used to connect balance plates and cast aluminum rotors, fixing the balance plates to the rotor ends by riveting. Due to the structural characteristics of the riveting ring, the material at the end is thicker, while the material in the stretched part is thinner, with the thickness of the stretched part being less than 1 / 3 of that at the end. Therefore, the thickness difference between the two ends of the riveting ring is too large.
[0003] If cold stamping is used, the punch needs to be continuously stamped multiple times, resulting in too many stamping processes and an excessively long production line. Therefore, the preparation of rivet rings mostly adopts heat treatment or machining to process the two ends of the rivet ring separately, and then the two ends of the rivet ring are connected by welding or riveting. Therefore, this type of processing results in low structural strength of the rivet ring, which leads to long processing time and high cost. Utility Model Content
[0004] This invention provides a stamping device for riveting rings of cast aluminum rotors to solve the problems of low connection strength caused by traditional machining and welding, and low processing efficiency caused by the need for multiple stamping operations when using cold stamping, resulting in excessively long production lines.
[0005] The technical solution adopted in this utility model is as follows:
[0006] A stamping device for riveting rings of cast aluminum rotors includes a base and a stamping mechanism; the stamping mechanism includes an upper mold assembly and a lower mold assembly connected to the base, with the lower mold assembly correspondingly disposed below the upper mold assembly;
[0007] The upper mold assembly includes a first punch and a drive mechanism connected to each other. The outer periphery of the first punch has a stepped stamping surface. The lower mold assembly includes a positioning plate, which can position and connect a blank. The first punch can stamp the blank downwards under the action of the drive mechanism, so that the blank is stamped to form a riveting ring preform.
[0008] The cast aluminum rotor riveting ring stamping device of this utility model also has the following additional technical features:
[0009] The first punch includes a first punch section, a second punch section, and a third punch section connected in a stepped manner; the first punch section is used to fit a blank; the second punch section is connected between the first punch section and the third punch section; the third punch section is connected to a drive mechanism.
[0010] The second punch section includes a first punch section and a second punch section connected to each other; the first punch section is connected to the first punch section; the second punch section is connected to the third punch section; and the outer periphery of the first punch section and the second punch section has a conical stamping surface.
[0011] The bottom of the first punch segment has a transition spherical surface; there is an arc-shaped first guide transition surface between the first punch segment and the first punch segment; there is an arc-shaped second guide transition surface between the first punch segment and the second punch segment; and there is an arc-shaped third guide transition surface between the second punch segment and the third punch segment.
[0012] The upper mold assembly also includes a first template assembly; the first template assembly includes a first fixed plate and a first movable plate, the first fixed plate is fixedly connected to the machine base, and the first movable plate is movably connected to the first fixed plate through a guide post; the third punch section is used to connect to the drive mechanism, and one end of the third punch section can extend into and connect to the first movable plate, driving the first movable plate to move downward under the action of the drive mechanism.
[0013] The third punch section includes a cylindrical connecting section one and a connecting section two connected to each other; the connecting section one is connected to the punch section two, and one end of the connecting section two can extend into and be connected to the first moving plate; there is an arc-shaped fourth guide transition surface between the connecting section one and the connecting section two.
[0014] The stamping mechanism further includes an upper pressing assembly and a lower pressing assembly. The lower pressing assembly includes a pressing plate for placing a blank. The upper pressing assembly includes a second template assembly, a second punch, and a driving device. The second template assembly includes a second fixed plate and a second movable plate. The second fixed plate is fixedly connected to the machine base, and the second movable plate is movably connected to the second fixed plate via guide posts. The second punch is fixedly connected to the second movable plate, and one end of the second punch is connected to the driving device connected to the base.
[0015] The second punch includes a first stamping section, a second stamping section, and a third stamping section connected in a stepped manner; the first stamping section includes a first stamping section and a second stamping section connected to each other; the outer periphery of the first stamping section and the second stamping section has a conical stamping surface, and the second stamping section is connected to the second stamping section; the third stamping section is used to connect to a driving device, and one end of the third stamping section can extend into and connect to the second moving plate, driving the second moving plate to move downward under the action of the driving device.
[0016] A first arc-shaped transition surface is formed at the bottom of the first stamping section; a second arc-shaped transition surface is formed between the first stamping section and the first stamping section; a third arc-shaped transition surface is formed between the first stamping section and the second stamping section; and a fourth arc-shaped transition surface is formed between the second stamping section and the third stamping section.
[0017] The cast aluminum rotor riveting ring stamping device also includes a guide assembly, which includes a first positioning member disposed on a first moving plate and a second positioning member disposed on a second moving plate, as well as a first connecting member and a second connecting member disposed on the positioning plate. The first positioning member can be connected with the first connecting member, and the second positioning member can be connected with the second connecting member.
[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:
[0019] 1. Because the first punch has a stepped structure, it can replace at least two stamping operations with a single stamping operation. Stepped stamping can significantly reduce stamping processes. Moreover, due to the different cross-sections of the stepped structure during stamping, it can increase the contact friction with the blank. This frictional extrusion will increase the temperature of the sheet metal, making the sheet metal processing easier. The first punch impacts the annular blank to perform preliminary shaping, forming a riveting ring preform, i.e., forming a stamped part with a stepped shaft structure. Then, the stamped part is stamped by the upper and lower pressing assemblies described below. The second punch described below also has a stepped structure and can replace at least two stamping operations with a single stamping operation. The stepped stamping process can further reduce the number of stamping steps, allowing the stamped part to be quickly stretched under the action of the second punch in the stepped structure. This stretches and thins one end of the stamped part, making the thickness of the thinned end less than that of the other end, until the size reaches a set threshold to form the riveting ring. Therefore, this application can avoid the problem of low connection strength after welding or riveting of the riveting ring caused by the traditional method of machining instead of cold stamping. It also avoids the problem of long processing time and high production cost caused by the need for continuous and repeated stamping in traditional cold stamping.
[0020] 2. In a preferred embodiment of the present invention, the first punch includes a first punch section, a second punch section, and a third punch section connected in a stepped manner; the first punch section is used to fit a blank; the second punch section is connected between the first punch section and the third punch section; and the third punch section is connected to the drive mechanism.
[0021] The first punch section, located at the bottom of the first punch, is used to assemble the annular blank, achieving initial positioning of the blank. The outer diameter of the first punch section must match the inner diameter of the blank to achieve a fitting connection. Furthermore, the second punch section includes two connected punch sections; punch section one is connected to the first punch section; punch section two is connected to the third punch section. The outer circumferences of punch sections one and two have conical stamping surfaces that can progressively enlarge the inner hole of the blank, achieving one stamping instead of two stampings, reducing the stamping process. Progressive stamping of the inner hole reduces wear on the blank, makes the radial and axial dimensions more uniform, and thus improves the structural strength of the entire riveting ring.
[0022] 3. In a preferred embodiment of the present invention, a transition spherical surface is formed at the bottom of the first punch segment; an arc-shaped first guide transition surface is provided between the first punch segment and the second punch segment; an arc-shaped second guide transition surface is provided between the first punch segment and the second punch segment; and an arc-shaped third guide transition surface is provided between the second punch segment and the third punch segment.
[0023] The transition spherical surface ensures that the first punch can be withdrawn smoothly without carrying material; the first guide transition surface, the second guide transition surface and the third guide transition surface have an arc-shaped structure, which can ensure that no scratches are caused to the inner wall of the blank and reduce wear.
[0024] 4. In a preferred embodiment of the present invention, the upper mold assembly further includes a first template assembly; the first template assembly includes a first fixed plate and a first movable plate, the first fixed plate is fixedly connected to the machine base, and the first movable plate is movably connected to the first fixed plate through a guide post; the third punch section is used to connect to the drive mechanism, and one end of the third punch section can extend into and connect to the first movable plate, and drive the first movable plate to move downward under the action of the drive mechanism.
[0025] The drive mechanism drives the first punch to move vertically in a straight line, and drives the first moving plate to move up and down relative to the first fixed plate along the guide post. When it is necessary to stamp the blank, the drive mechanism drives the first punch to move downward, so that the first moving plate moves downward with the first punch. The first moving plate can position the blank. The blank is stamped by the first punch section and the second punch section of the first punch, so that the circular blank is formed into a stepped shaft-shaped stamped part. Attached Figure Description
[0026] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0027] Figure 1 This is a schematic diagram of a cast aluminum rotor riveting ring stamping device according to one embodiment of this application;
[0028] Figure 2 This is a schematic diagram of the first punch structure of a cast aluminum rotor riveting ring stamping device according to one embodiment of this application;
[0029] Figure 3 This is a schematic diagram of the second punch structure of a cast aluminum rotor riveting ring stamping device according to one embodiment of this application;
[0030] Figure 4 This is a schematic diagram of the structure of a blank for a cast aluminum rotor riveting ring stamping device according to one embodiment of this application;
[0031] Figure 5 This is a schematic diagram of the stamping part of a cast aluminum rotor riveting ring stamping device according to one embodiment of this application;
[0032] In the picture,
[0033] 1. Base; 2. Upper mold assembly; 21. First punch; 211. First punch section; 212. Second punch section; 2121. Punch section one; 2122. Punch section two; 213. Third punch section; 2131. Connecting section one; 2132. Connecting section two; 22. First template assembly; 221. First fixing plate; 222. First moving plate; 3. Positioning plate; 4. Upper pressing assembly; 41. Second template assembly; 411. Second fixing plate; 412. Second moving plate; 42. 421. Second punch; 421. First stamping section; 4211. Stamping section one; 4212. Stamping section two; 422. Second stamping section; 423. Third stamping section; 5. Press plate; 6. Transition spherical surface; 7. First guide transition surface; 8. Second guide transition surface; 9. Third guide transition surface; 10. Fourth guide transition surface; 11. First arc-shaped transition surface; 12. Second arc-shaped transition surface; 13. Third arc-shaped transition surface; 14. Fourth arc-shaped transition surface; 15. Blank; 16. Stamped part. Detailed Implementation
[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.
[0035] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0037] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0038] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.
[0039] This utility model relates to a stamping device for riveting rings on a cast aluminum rotor, such as... Figures 1-5 As shown, it includes a base 1 and a stamping mechanism; the stamping mechanism includes an upper mold assembly 2 and a lower mold assembly connected to the base 1, with the lower mold assembly correspondingly disposed below the upper mold assembly 2; the upper mold assembly 2 includes a first punch 21 and a driving mechanism connected to each other, and the outer periphery of the first punch 21 has a stepped stamping surface; the lower mold assembly includes a positioning plate 3, which can position and connect a blank 15; the first punch 21 can stamp the blank 15 downwards under the action of the driving mechanism, so that the blank 15 is stamped to form a riveting ring preform.
[0040] Because the first punch 21 has a stepped structure, it can replace at least two punches with one punch, and the stepped punching can significantly reduce the number of punching processes. Moreover, due to the different cross-sections of the stepped structure during the punching process, the contact friction between the punch and the blank 15 can be increased. This frictional extrusion will increase the temperature of the sheet metal, making the sheet metal processing easier. The first punch 21 impacts the annular blank 15 to perform preliminary shaping, forming a riveting ring preform, that is, forming a stamped part 16 with a stepped shaft structure. Then, the stamped part 16 is stamped by the upper pressing assembly 4 and the lower pressing assembly described below. The second punch 42 described below also has a stepped structure, which can replace the number of punches with one punch. Instead of at least two stamping operations, stepped stamping can further reduce the stamping process, allowing the stamped part 16 to be rapidly stretched under the action of the second punch 42 of the stepped structure. This causes one end of the stamped part 16 to be stretched thinner, with the thickness of the thinned end being less than that of the other end, until the size reaches a set threshold to achieve the forming of the rivet ring. Therefore, this application can avoid the problem of low connection strength after welding or riveting of the rivet ring caused by the traditional method of machining instead of cold stamping. It also avoids the problem of long processing time and high production cost caused by the need for continuous and repeated stamping in traditional cold stamping.
[0041] Furthermore, the first punch 21 includes a first punch section 211, a second punch section 212, and a third punch section 213 connected in a stepped manner; the first punch section 211 is used to sleeve the blank 15; the second punch section 212 is connected between the first punch section 211 and the third punch section 213; and the third punch section 213 is connected to the drive mechanism.
[0042] The first punch section 211 is located at the bottom of the first punch 21 and is used to fit the annular blank 15 into place, achieving initial positioning of the blank 15. The outer diameter of the first punch section 211 needs to match the inner diameter of the blank 15 to achieve the sleeve connection of the blank 15. Furthermore, the second punch section 212 includes a first punch section 2121 and a second punch section 2122 connected to each other. The first punch section 2121 is connected to the first punch section 211, and the second punch section 2122 is connected to the third punch section 213. The outer periphery of the first punch section 2121 and the second punch section 2122 are formed with conical stamping surfaces, which enable them to progressively enlarge the inner hole of the blank 15, realizing one stamping instead of two stampings, reducing the stamping process. The progressive stamping of the inner hole reduces the wear of the blank 15, makes the radial and axial dimensions more uniform, and thus improves the structural strength of the entire riveting ring.
[0043] Furthermore, a transition spherical surface 6 is formed at the bottom of the first punch segment 211; an arc-shaped first guide transition surface 7 is formed between the first punch segment 211 and the first punch segment 2121; an arc-shaped second guide transition surface 8 is formed between the first punch segment 2121 and the second punch segment 2122; and an arc-shaped third guide transition surface 9 is formed between the second punch segment 2122 and the third punch segment 213.
[0044] The transition spherical surface 6 ensures that the first punch 21 can be withdrawn smoothly without carrying material; the first guide transition surface 7, the second guide transition surface 8 and the third guide transition surface 9 have an arc-shaped structure, which can ensure that no scratches are caused to the inner wall of the blank 15 and reduce wear.
[0045] Furthermore, the upper mold assembly 2 also includes a first template assembly 22; the first template assembly 22 includes a first fixed plate 221 and a first movable plate 222, the first fixed plate 221 is fixedly connected to the machine base, and the first movable plate 222 is movably connected to the first fixed plate 221 through a guide post; the third punch section 213 is used to connect to the drive mechanism, and one end of the third punch section 213 can extend into and connect to the first movable plate 222, and drive the first movable plate 222 to move downward under the action of the drive mechanism.
[0046] The drive mechanism drives the first punch 21 to move linearly in the vertical direction, and drives the first moving plate 222 to move up and down relative to the first fixed plate 221 along the guide post. When it is necessary to stamp the blank 15, the drive mechanism drives the first punch 21 to move downward, so that the first moving plate 222 moves downward along with the first punch 21. The first moving plate 222 can position the blank 15. The blank 15 is stamped by the first punch section 211 and the second punch section 212 of the first punch 21, so that the annular blank 15 is formed into a stepped shaft-shaped stamped part 16.
[0047] Furthermore, the third punch section 213 includes a cylindrical connecting section 1 2131 and a connecting section 2132 connected to each other; the connecting section 1 2131 is connected to the punch section 2122, and one end of the connecting section 2132 can extend into the first moving plate 222; there is an arc-shaped fourth guide transition surface 10 between the connecting section 1 2131 and the connecting section 2132.
[0048] The stepped connecting segments 2131 and 2132 enable the gradual enlargement and finishing of the inner hole of the stamped part 16. Furthermore, the stepped connecting segments 2131 and 2132 allow for one stamping process instead of two, reducing the stamping process. The gradual stamping of the inner hole reduces wear on the stamped part 16 and makes the radial and axial dimensions more uniform, thereby improving the structural strength of the entire rivet ring.
[0049] In a preferred embodiment, the stamping mechanism further includes an upper pressing assembly 4 and a lower pressing assembly. The lower pressing assembly includes a pressing plate 5 for placing the blank 15. The upper pressing assembly 4 includes a second template assembly 41, a second punch 42, and a driving device. The second template assembly 41 includes a second fixed plate 411 and a second movable plate 412. The second fixed plate 411 is fixedly connected to the machine base, and the second movable plate 412 is movably connected to the second fixed plate 411 via guide posts. The second punch 42 is fixedly connected to the second movable plate 412, and one end of the second punch 42 is connected to the driving device connected to the base 1.
[0050] The upper pressing assembly 4 and the lower pressing assembly cooperate with each other. The lower pressing assembly is located directly below the upper pressing assembly 4. The upper pressing assembly 4 is used to set the second punch 42, and the lower pressing assembly is used to place the stamped part 16. The stamping and forming of the riveting ring is achieved by the second punch 42 of the upper pressing assembly 4 pressing the stamped part 16 downwards. Specifically, the driving device can drive the second punch 42 to move linearly in the vertical direction. The third stamping section 423 of the second punch 42, as described below, is connected to the second moving plate 412. When it is necessary to press the stamped part 16... During stamping, the third stamping section 423 is driven downward by the drive device, thereby causing the second moving plate 412 to move downward relative to the second fixed plate 411 along the guide post. The second moving plate 412 can position the stamped part 16. The first stamping section 421 and the second stamping section 422 of the second punch 42 stamp the stamped part 16 step by step, so that the inner diameter of the stamped part 16 is uniformly and gradually expanded. One stamping can replace the traditional two-stage stamping, reducing the frequency of punch use and the overall production process time, and improving production efficiency.
[0051] Furthermore, the second punch 42 includes a first stamping section 421, a second stamping section 422, and a third stamping section 423 connected in a stepped manner; the first stamping section 421 includes a first stamping section 4211 and a second stamping section 4212 connected to each other; the outer periphery of the first stamping section 4211 and the second stamping section 4212 is formed with a conical stamping surface, and the second stamping section 4212 is connected to the second stamping section 422; the third stamping section 423 is used to connect to the driving device, and one end of the third stamping section 423 can extend into and connect to the second moving plate 412, and drive the second moving plate 412 to move downward under the action of the driving device.
[0052] The first stamping section 421 is located at the bottom of the second punch 42. The first stamping section 421 includes at least two stamping sections 4211 and 4212 with a stepped structure, realizing the graded stamping of the stamped part 16. Since both stamping sections 4211 and 4212 have conical stamping surfaces, the stamped part 16 can be stamped step by step from stamping section 4211 to stamping section 4212, so that the inner diameter of the stamped part 16 is continuously and uniformly expanded, realizing uniform stamping of the stamped part 16, reducing wear and stamping processes, and reducing processing time.
[0053] Furthermore, it should be noted that a first arc-shaped transition surface 11 is formed at the bottom of the first stamping section 421; a second arc-shaped transition surface 12 is formed between the first stamping section 4211 and the first stamping section 4211; a third arc-shaped transition surface 13 is formed between the first stamping section 4211 and the second stamping section 4212; and a fourth arc-shaped transition surface 14 is formed between the second stamping section 4212 and the third stamping section 423.
[0054] The first arc-shaped transition surface 11, the second arc-shaped transition surface 12, and the third arc-shaped transition surface 13 have an arc-shaped structure, which can ensure that no scratches are caused to the inner wall of the blank 15 and reduce wear.
[0055] In a preferred embodiment, the cast aluminum rotor riveting ring stamping device further includes a guide assembly. The guide assembly includes a first positioning member disposed on the first moving plate 222 and a second positioning member disposed on the second moving plate 412, as well as a first connecting member and a second connecting member disposed on the positioning plate 3. The first positioning member can be connected to the first connecting member, and the second positioning member can be connected to the second connecting member.
[0056] The first positioning member and the first connecting member can be sleeved together; the second positioning member and the second connecting member can be sleeved together. By setting the first positioning member and the first connecting member to cooperate and connect, the purpose is to further improve the positioning accuracy between the first moving plate 222 and the stamping plate, ensuring that the position of the first punch 21 is directly opposite the blank 15, and improving the stamping quality. By setting the second positioning member and the second connecting member to cooperate and connect, the purpose is to further improve the positioning accuracy between the second moving plate 412 and the pressing plate 5, ensuring that the position of the second punch 42 is directly opposite the stamped part 16, thereby further improving the positioning accuracy of stamping and improving the stamping quality.
[0057] For example, the first positioning member and the second positioning member can be sleeves, and the first connecting member and the second connecting member can be cylindrical structures. The first connecting member is located directly below the first positioning member, and the second connecting member is located directly below the second positioning member. When the first positioning member moves downward with the first moving plate 222, it can be sleeved on the outside of the first connecting member. When the second positioning member moves downward with the second moving plate 412, it can be sleeved on the outside of the second connecting member.
[0058] For any parts not mentioned in this utility model, existing technologies can be used or referenced.
[0059] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0060] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.
Claims
1. A cast aluminum rotor press ring swaging apparatus characterized by, The device comprises a base and a stamping mechanism; the stamping mechanism comprises an upper die assembly and a lower die assembly connected to the base, and the lower die assembly is arranged below the upper die assembly; The upper die assembly comprises a first punch and a driving mechanism connected to each other, and the outer periphery of the first punch has a stepped stamping surface; the lower die assembly comprises a positioning plate capable of positioning a blank; 2. A swage ring punching device for an aluminum-alloy rotor as set forth in claim 1, wherein The first punch comprises a first punch segment, a second punch segment and a third punch segment connected in a stepped manner; The first punch segment is used for sleeving the blank; the second punch segment is connected between the first punch segment and the third punch segment; and the third punch segment is connected to the driving mechanism.
3. A swager for aluminum cast rotor press rings as defined in claim 2 wherein, The second punch segment comprises a first punch segment and a second punch segment connected to each other; The first punch segment is connected to the first punch segment; the second punch segment is connected to the third punch segment; and the outer periphery of the first punch segment and the second punch segment forms a tapered stamping surface.
4. A swager for aluminum cast rotor press rings as defined in claim 3 wherein, The bottom of the first punch segment forms a transition spherical surface; the first punch segment and the first punch segment have an arc-shaped first guide transition surface; the first punch segment and the second punch segment have an arc-shaped second guide transition surface, and the second punch segment and the third punch segment have an arc-shaped third guide transition surface.
5. A swager for aluminum cast rotor press rings as defined in claim 3 wherein, The upper die assembly further comprises a first die plate assembly; The first die plate assembly comprises a first fixed plate and a first movable plate, the first fixed plate is fixedly connected to the machine base, and the first movable plate is movably connected to the first fixed plate through a guide column; the third punch segment is used for being connected to the driving mechanism, and one end of the third punch segment can extend into the first movable plate; and the first movable plate is driven to move downward by the driving mechanism.
6. A swager for aluminum-alloy-rotor press rings as defined in claim 5 wherein, The third punch segment comprises a cylindrical first connecting segment and a second connecting segment connected to each other; one end of the second connecting segment can extend into the first movable plate; and the first connecting segment and the second connecting segment have an arc-shaped fourth guide transition surface.
7. A swage ring punching device for an aluminum-alloy rotor as set forth in claim 6 wherein, The stamping mechanism further comprises an upper pressing assembly and a lower pressing assembly; the lower pressing assembly comprises a pressing plate for placing the blank; the upper pressing assembly comprises a second die plate assembly, a second punch and a driving device; The second die plate assembly comprises a second fixed plate and a second movable plate, the second fixed plate is fixedly connected to the machine base, and the second movable plate is movably connected to the second fixed plate through a guide column; the second punch is fixedly connected to the second movable plate, and one end of the second punch is connected to the driving device connected to the base.
8. A swager for aluminum-alloy-rotor press rings as defined in claim 7 wherein, The second punch comprises a first stamping segment, a second stamping segment and a third stamping segment connected in a stepped manner; The first stamping section comprises a first stamping section and a second stamping section connected with each other; the outer periphery of the first stamping section and the second stamping section is formed with a tapered stamping surface; the second stamping section is connected with a second moving plate; the third stamping section is connected with a driving device; one end of the third stamping section can extend into the second moving plate; the second moving plate is driven by the driving device to move downward.
9. A swage ring stamping device for an aluminum-alloy rotor as set forth in claim 8 wherein, The bottom of the first stamping section is formed with a first arc-shaped transition surface; the first stamping section and the second stamping section are formed with a second arc-shaped transition surface; the first stamping section and the second stamping section are formed with a third arc-shaped transition surface; the second stamping section and the third stamping section are formed with a fourth arc-shaped transition surface.
10. A swager for aluminum rotor press rings as defined in claim 7 wherein, The cast aluminum rotor riveting ring stamping device further comprises a guide assembly, the guide assembly comprising a first positioning member arranged on the first moving plate, a second positioning member arranged on the second moving plate, and a first connecting member and a second connecting member arranged on the positioning plate; the first positioning member is capable of being connected with the first connecting member in a matched manner; the second positioning member is capable of being connected with the second connecting member in a matched manner.