A one-time hot forging forming equipment for a star sleeve

Abstract

The present application belongs to the field of forging forming technology, and particularly relates to a one-time hot forging forming equipment for a star-shaped sleeve, which comprises a top die assembly, a top die locking assembly, a top die driving assembly, a side die driving assembly, a lifting assembly, a base assembly and a star-shaped sleeve, the lifting assembly is arranged on the base assembly, the star-shaped sleeve is located below the top die assembly, the top die driving assembly is arranged below the lifting assembly, and the top die assembly is arranged below the top die driving assembly. Through the continuous movement of the lifting assembly, the technical scheme that the top die and the side die are automatically and sequentially driven to move is realized. Meanwhile, the top die locking assembly is introduced in the scheme, and the locking plate located between the top die and the longitudinal piston ring can keep the relative freedom between the top die and the longitudinal piston ring and rigidly lock the top die after the top die is in place.

Description

Technical Field

[0001] This invention belongs to the field of forging and forming technology, specifically referring to a one-time hot forging forming equipment for a star-shaped sleeve. Background Technology

[0002] Star-shaped sleeves are internal parts used in automotive universal joints. They have high strength and hardness requirements, so they are often processed by forging. Small parts often use a one-time forging technique. However, due to the relatively complex shape of the star-shaped sleeve, the motion design of the die is often quite complicated during one-time forging.

[0003] When the lower mold base is stationary, during the forging process of the star-shaped sleeve, both the upper mold and the side mold need to have relative movement with the workpiece. Most existing technologies have complex structures and require a complete set of electrical control systems to control the driving sequence between various sub-components. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the present invention provides a one-time hot forging forming equipment for star-shaped sleeves. The present invention first proposes a technical solution that automatically and sequentially drives the top mold and the side mold to move through the continuous movement of the lifting component. However, this solution has a difficult problem to solve. Since the top mold will first abut against the star-shaped sleeve, the top mold and the longitudinal piston ring must always maintain relative movement. However, when the top mold in the free state is subjected to the deformation pressure of the star-shaped sleeve, the spring alone cannot effectively limit the star-shaped sleeve. To overcome this technical problem, this solution introduces a top mold locking assembly. Through the locking pressure plate located between the top mold and the longitudinal piston ring, the relative freedom between the top mold and the longitudinal piston ring can be maintained, while the top mold can be rigidly locked after it is in place.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a one-time hot forging forming equipment for a star-shaped sleeve, including a top die assembly, a top die locking assembly, a top die driving assembly, a side die driving assembly, a lifting assembly, a base assembly and a star-shaped sleeve. The lifting assembly is disposed on the base assembly, the star-shaped sleeve is located below the top die assembly, the top die driving assembly is disposed below the lifting assembly, and the top die assembly is disposed below the top die driving assembly. The side mold driving assembly includes a side mold and a mold guide frame. The mold guide frame is mounted on the lifting assembly, and the side mold is engaged and slidably mounted in the mold guide frame. The top mold locking assembly includes a locking bracket and a locking pin. The top mold locking assembly is mounted on the mold guide frame, and the locking pin is engaged and slidably mounted in the locking bracket.

[0006] Furthermore, the top mold assembly includes a top mold and a second spring, the second spring being disposed on the top of the top mold, the top mold having a central hole, the side of the top mold having side holes evenly distributed in a ring, the locking bracket having stepped holes evenly distributed in a ring, and the locking pin being engaged and slidably disposed in the stepped holes and the side holes.

[0007] The locking bracket is provided with a base plate, which is located above the mold guide frame, and the locking pin is provided with a ramp. Preferably, the top mold locking assembly further includes a return spring and a locking pressure plate. The locking pressure plate is provided with a pressure ring portion, which slides in contact with the ramp portion. The return spring is located above the locking pressure plate, and the second spring is located between the locking pressure plate and the top mold.

[0008] Furthermore, the side mold driving assembly also includes an annular hydraulic chamber and a side mold driving piston. The annular hydraulic chamber has side chambers evenly distributed on its inner side. The side mold driving piston is engaged and slidably disposed in the side chambers. The end of the side mold driving piston is connected to the side mold.

[0009] Preferably, the side mold drive assembly further includes a longitudinal piston ring, and the top of the annular hydraulic chamber is provided with a top chamber, in which the longitudinal piston ring is engaged and slidably disposed.

[0010] Furthermore, the lifting assembly includes a lifting top cover and a lifting push rod, with the lifting top cover located at the top of the lifting push rod and the longitudinal piston ring located below the lifting top cover.

[0011] Furthermore, the top mold driving assembly includes a first spring, a guide sleeve, and a guide hollow rod. The first spring is disposed between the locking pressure plate and the lifting top cover. The guide hollow rod is engaged and slidably disposed in the guide sleeve. The guide sleeve is disposed at the bottom of the lifting top cover, and the guide hollow rod is disposed above the locking pressure plate.

[0012] Furthermore, the base assembly includes a base body and a central positioning rod. The lifting push rod is disposed on the base body, and the central positioning rod is disposed in the base body. The central positioning rod is provided with a flange and an end head. The star-shaped sleeve is located above the flange and is sleeved on the end head.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: (1) This solution can not only automatically push the top mold and the side mold in sequence through the lifting component, but also keep the top mold locked after it is in place, thus overcoming the technical contradiction that the top mold must be able to lift (relative movement with the lifting top cover) and cannot be forced to reset after being pressed.

[0014] (2) After the top mold descends to the designated position, the descent of the pressure ring will push the locking pin to slide inward and complete the locking connection between the locking bracket and the top mold, thereby avoiding the problem that the conventional linkage mechanism will move upward due to excessive pressure below after the top mold is in place.

[0015] (3) The top mold is connected to the lifting top cover by two springs, the second spring and the first spring, so that it can maintain its own longitudinal free state when it is not locked, and can still maintain relative movement with the lifting top cover after its own position is locked.

[0016] (4) When the longitudinal piston ring moves up and down, it can drive the piston through the side mold to move each side mold closer to or away from the star sleeve, thereby realizing the technical purpose of converting the longitudinal motion into the horizontal motion.

[0017] (5) The pressure on the pistons of each side die is equal, which can ensure the uniformity of pressure in all directions during forging. A synchronous limiting mechanism can be added between each group of side dies to achieve synchronous sliding of each side die.

[0018] (6) The flange and the end head can limit the center hole and bottom of the star-shaped sleeve during the forging process. Attached Figure Description

[0019] Figure 1 This is a perspective view of a one-time hot forging forming equipment for a star-shaped sleeve according to the present invention; Figure 2 This is a front view of a one-time hot forging forming equipment for a star-shaped sleeve proposed in this invention; Figure 3 for Figure 2 A cross-sectional view along section line AA; Figure 4 for Figure 3 A cross-sectional view along the cutting line BB; Figure 5 This is an exploded view of the structure of a one-time hot forging equipment for a star-shaped sleeve proposed in this invention. Figure 1 ; Figure 6 This is an exploded view of the structure of a one-time hot forging equipment for a star-shaped sleeve proposed in this invention. Figure 2 ; Figure 7 for Figure 3 A magnified view of a section at point I; Figure 8 for Figure 3 Enlarged view of a section at point II; Figure 9 for Figure 4 Enlarged view of a section at point III; Figure 10for Figure 6 A magnified view of a section at point IV.

[0020] The components include: 1. Top mold assembly; 2. Top mold locking assembly; 3. Top mold drive assembly; 4. Side mold drive assembly; 5. Lifting assembly; 6. Base assembly; 7. Star sleeve; 11. Top mold; 12. Second spring; 21. Locking bracket; 22. Locking pin; 23. Return spring; 24. Locking pressure plate; 31. First spring; 32. Guide sleeve; 33. Guide hollow rod; 41. Longitudinal piston ring; 42. Annular hydraulic chamber; 43. Side mold drive piston; 44. Side mold; 45. Mold guide frame; 51. Lifting top cover; 52. Lifting push rod; 61. Base body; 62. Center positioning rod; 111. Side hole; 112. Center hole; 211. Base plate; 212. Step hole; 221. Slope; 241. Pressure ring; 421. Top chamber; 422. Side chamber; 621. Flange; 622. End head.

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 invention 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 invention.

[0024] like Figures 1-10 As shown, the present invention proposes a one-time hot forging forming equipment for a star-shaped sleeve, including a top die assembly 1, a top die locking assembly 2, a top die driving assembly 3, a side die driving assembly 4, a lifting assembly 5, a base assembly 6, and a star-shaped sleeve 7. The lifting assembly 5 is disposed on the base assembly 6, the star-shaped sleeve 7 is located below the top die assembly 1, the top die driving assembly 3 is disposed below the lifting assembly 5, and the top die assembly 1 is disposed below the top die driving assembly 3. The side mold drive assembly 4 includes a side mold 44 and a mold guide frame 45. The mold guide frame 45 is mounted on the lifting assembly 5, and the side mold 44 is engaged and slidably mounted in the mold guide frame 45. The top mold locking assembly 2 includes a locking bracket 21 and a locking pin 22. The top mold locking assembly 2 is mounted on the mold guide frame 45, and the locking pin 22 is engaged and slidably mounted in the locking bracket 21.

[0025] This solution can not only automatically push the top mold 11 and the side mold 44 sequentially through the lifting component 5, but also keep the top mold 11 locked after it is in place, thus overcoming the technical contradiction that the top mold 11 must be able to move up and down (relative to the lifting top cover 51) and cannot be forced to reset after being pressed.

[0026] The top mold assembly 1 includes a top mold 11 and a second spring 12. The second spring 12 is located on the top of the top mold 11. The top mold 11 has a central hole 112. The side of the top mold 11 has side holes 111 evenly distributed in a ring. The locking bracket 21 has stepped holes 212 evenly distributed in a ring. The locking pin 22 is engaged and slidably disposed in the stepped holes 212 and the side holes 111.

[0027] The locking bracket 21 is provided with a base plate 211, which is located above the mold guide frame 45. The locking pin 22 is provided with a ramp 221. After the top mold 11 descends to the designated position, the descent of the pressure ring 241 will push the locking pin 22 to slide inward and complete the locking connection between the locking bracket 21 and the top mold 11, thereby avoiding the problem that the conventional linkage mechanism will move upward due to excessive pressure below after the top mold 11 is in place.

[0028] The top mold locking assembly 2 also includes a return spring 23 and a locking pressure plate 24. The locking pressure plate 24 is provided with a pressure ring 241, which slides in contact with the slope 221. The return spring 23 is located above the locking pressure plate 24, and the second spring 12 is located between the locking pressure plate 24 and the top mold 11.

[0029] The top mold 11 is connected to the lifting top cover 51 by two springs, the second spring 12 and the first spring 31. It can maintain its own longitudinal free state when it is not locked, and can still maintain relative movement with the lifting top cover 51 after it is locked.

[0030] The side mold drive assembly 4 also includes an annular hydraulic chamber 42 and a side mold drive piston 43. The annular hydraulic chamber 42 has side chambers 422 evenly distributed in an annular pattern on its inner side. The side mold drive piston 43 is engaged and slidably disposed in the side chambers 422. The end of the side mold drive piston 43 is connected to the side mold 44.

[0031] When the longitudinal piston ring 41 moves up and down, it can drive the piston 43 through the side mold to move each side mold 44 closer to or away from the star sleeve 7, thereby achieving the technical purpose of converting longitudinal motion into horizontal motion.

[0032] The pressure on each side die driving piston 43 is equal, which can ensure the uniformity of pressure in all directions during forging. A synchronous limiting mechanism can be added between each group of side dies 44 to achieve synchronous sliding of each side die 44.

[0033] The side mold drive assembly 4 also includes a longitudinal piston ring 41. The top of the annular hydraulic chamber 42 is provided with a top chamber 421, and the longitudinal piston ring 41 is engaged and slidably disposed in the top chamber 421.

[0034] The lifting assembly 5 includes a lifting top cover 51 and a lifting push rod 52. The lifting top cover 51 is located on top of the lifting push rod 52, and the longitudinal piston ring 41 is located below the lifting top cover 51.

[0035] The top mold drive assembly 3 includes a first spring 31, a guide sleeve 32, and a guide hollow rod 33. The first spring 31 is located between the locking pressure plate 24 and the lifting top cover 51. The guide hollow rod 33 is engaged and slidably located in the guide sleeve 32. The guide sleeve 32 is located at the bottom of the lifting top cover 51, and the guide hollow rod 33 is located above the locking pressure plate 24.

[0036] The base assembly 6 includes a base body 61 and a central positioning rod 62. The lifting push rod 52 is located on the base body 61, and the central positioning rod 62 is located in the base body 61. The central positioning rod 62 is provided with a flange 621 and an end head 622. The star-shaped sleeve 7 is located above the flange 621 and is fitted onto the end head 622.

[0037] The flange 621 and the end head 622 can limit the center hole 112 and the bottom of the star sleeve 7 during the forging process.

[0038] In practical use, the user first needs to place the blank of the star-shaped sleeve 7 onto the end head 622, and then place the center positioning rod 62 together with the star-shaped sleeve 7 into the base body 61. This process can be completed by external equipment such as a robotic arm.

[0039] Then, the lifting top cover 51 slowly descends by retracting the lifting push rod 52; When the lifting top cover 51 descends, it first drives the top mold 11 and the locking pressure plate 24 to descend together. The top mold 11 is first fitted onto the end head 622 and abuts against the top of the mold guide frame 45. The top of the mold guide frame 45 is flush with the top of the blank of the star sleeve 7. Then the locking plate 24 continues to descend. During this process, the second spring 12 is compressed. When the pressure ring 241 abuts against the ramp 221, the locking plate 24 will push the locking pin 22 to slide into the side hole 111 while descending, thus completing the connection and locking between the top mold 11 and the locking bracket 21. In the subsequent forging process, the top mold 11 and the locking bracket 21 maintain a locked connection. Therefore, even if the star sleeve 7 has a tendency to deform in the vertical direction when subjected to horizontal pressure, it will not deform because the top mold 11 and the flange 621 limit it.

[0040] As the lifting top cover 51 descends, it also drives the longitudinal piston ring 41 to descend. During the descent of the longitudinal piston ring 41 along the top chamber 421, the thrust of the transmission oil can simultaneously push each set of side mold drive pistons 43 to extend, thereby driving the side mold 44 to slide along the mold guide frame 45. When the side die drive piston 43 extends to its limit position, the side die 44 also slides into place, thus completing the one-time forging of the star-shaped sleeve 7 blank.

[0041] The pressure on each side die driving piston 43 is equal, which can ensure the uniformity of pressure in all directions during forging. At the same time, a synchronous limiting mechanism (such as a turntable with evenly distributed inclined grooves and a protrusion that slides in the grooves on the top of the side die 44) can be added between each group of side dies 44 to achieve synchronous sliding of each side die 44.

[0042] After forging is completed, simply reverse the lifting push rod 52 and slowly raise the lifting top cover 51, and the aforementioned moving parts will move away from each other or unlock themselves according to the reverse steps described above.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A one-time hot forging forming device for a star-shaped sleeve, comprising a top die assembly (1), a lifting assembly (5), a base assembly (6), and a star-shaped sleeve (7), wherein the lifting assembly (5) is disposed on the base assembly (6), and the star-shaped sleeve (7) is located below the top die assembly (1), characterized in that: Also includes: The top mold drive assembly (3) is located below the lifting assembly (5), and the top mold assembly (1) is located below the top mold drive assembly (3). The side mold drive assembly (4) includes a side mold (44) and a mold guide frame (45). The mold guide frame (45) is mounted on the lifting assembly (5), and the side mold (44) is engaged and slidably mounted in the mold guide frame (45). The top mold locking assembly (2) includes a locking bracket (21) and a locking pin (22). The top mold locking assembly (2) is mounted on the mold guide frame (45), and the locking pin (22) is engaged and slidably mounted in the locking bracket (21).

2. The one-time hot forging equipment for a star-shaped sleeve according to claim 1, characterized in that: The top mold assembly (1) includes a top mold (11) and a second spring (12). The second spring (12) is located on the top of the top mold (11). The top mold (11) has a central hole (112). The side of the top mold (11) is provided with side holes (111) evenly distributed in a ring. The locking bracket (21) is provided with stepped holes (212) evenly distributed in a ring. The locking pin (22) is engaged and slidably disposed in the stepped holes (212) and the side holes (111).

3. The one-time hot forging equipment for a star-shaped sleeve according to claim 2, characterized in that: The locking bracket (21) is provided with a base plate (211), which is located above the mold guide frame (45), and the locking pin (22) is provided with a ramp (221). The top mold locking assembly (2) also includes a reset spring (23) and a locking pressure plate (24). The locking pressure plate (24) is provided with a pressure ring (241). The pressure ring (241) and the ramp (221) are in sliding contact. The reset spring (23) is located above the locking pressure plate (24). The second spring (12) is located between the locking pressure plate (24) and the top mold (11).

4. The one-time hot forging equipment for a star-shaped sleeve according to claim 3, characterized in that: The side mold drive assembly (4) further includes an annular hydraulic chamber (42) and a side mold drive piston (43). The annular hydraulic chamber (42) has side chambers (422) evenly distributed on its inner side. The side mold drive piston (43) is engaged and slidably disposed in the side chamber (422). The end of the side mold drive piston (43) is connected to the side mold (44).

5. The one-time hot forging equipment for a star-shaped sleeve according to claim 4, characterized in that: The side mold drive assembly (4) also includes a longitudinal piston ring (41), and a top chamber (421) is provided at the top of the annular hydraulic chamber (42), and the longitudinal piston ring (41) is engaged and slidably disposed in the top chamber (421).

6. The one-time hot forging equipment for a star-shaped sleeve according to claim 5, characterized in that: The lifting assembly (5) includes a lifting top cover (51) and a lifting push rod (52). The lifting top cover (51) is located on top of the lifting push rod (52), and the longitudinal piston ring (41) is located below the lifting top cover (51).

7. The one-time hot forging equipment for a star-shaped sleeve according to claim 6, characterized in that: The top mold drive assembly (3) includes a first spring (31), a guide sleeve (32) and a guide hollow rod (33). The first spring (31) is located between the locking pressure plate (24) and the lifting top cover (51). The guide hollow rod (33) is engaged and slidably located in the guide sleeve (32). The guide sleeve (32) is located at the bottom of the lifting top cover (51), and the guide hollow rod (33) is located above the locking pressure plate (24).

8. The one-time hot forging equipment for a star-shaped sleeve according to claim 7, characterized in that: The base assembly (6) includes a base body (61) and a center positioning rod (62). The lifting push rod (52) is located on the base body (61), and the center positioning rod (62) is located in the base body (61). The center positioning rod (62) is provided with a flange (621) and an end head (622). The star-shaped sleeve (7) is located above the flange (621) and is fitted onto the end head (622).

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