Universal split die for gear forgings

Abstract

The utility model relates to a general split die for gear forgings, which comprises an upper backing plate and a lower backing plate, an upper die set is arranged at the bottom of the upper backing plate, a lower die set is arranged at the top of the lower backing plate, the upper die set consists of a general upper circular plate and an upper die, and the general upper circular plate is fixedly mounted on the bottom surface of the upper backing plate. The upper die is fixedly mounted on the bottom surface of the universal upper circular plate; the lower die set comprises a universal outer die sleeve, the universal outer die sleeve is fixedly installed on the top face of a lower base plate, a vertically-communicated sleeving hole is formed in the center of the universal outer die sleeve, and the peripheral contour of a universal upper circular plate is matched with the contour of the upper end of the sleeving hole. A universal lower circular plate is arranged at the position, located in the sleeving hole, of the lower base plate, and a lower die is arranged at the top of the universal lower circular plate. According to the general split die for the gear forgings, the whole large die is divided into the small die blocks of different sizes and specifications, production of the gear forgings of different sizes and specifications is achieved in a combined installation mode, use is flexible, and universality is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear forging die forging die, especially a gear forging general split die. BACKGROUND

[0002] The existing gear machining, especially some larger volume gear machining, is produced by casting and die forging. The casting process is simple to operate, and after casting into a corresponding gear die blank, rough and finish machining is carried out by a machine tool to make a corresponding gear part. However, the gear part processed by casting has low strength, and pores or impurities are easily generated during casting, which reduces the product qualification rate, increases the manufacturing cost, and lowers the production efficiency. The gear processed by die forging has higher structural strength, which improves the service life and stability of the product, so the processing method is more widely used than the casting method.

[0003] At present, the die forging die for manufacturing gear forgings mainly comprises an upper circular plate, a lower circular plate, an upper die set and a lower die set. The upper die set and the lower die set are fixed at the bottom of the upper circular plate and the top of the lower circular plate, respectively. The upper circular plate is installed on the upper die plate of a die forging hydraulic machine through an upper pad plate. The die forging hydraulic machine can drive the upper circular plate and the upper die set downward through the upper die plate to cooperate with the lower die set, so as to realize the forging and forming of the blank placed in the lower die set. However, the die forging die for gear forgings has single components, and can only be used for the machining of gear forgings of one size. When machining gear forgings of other sizes, a new die forging die needs to be configured, and the components of the die forging dies cannot be used universally, which increases the cost of the die forging die and the machining cost, and makes the die forging die less flexible. SUMMARY

[0004] The utility model solves the technical problem of providing a gear forging general split die which is flexible to use and has high universality.

[0005] In order to solve the above technical problem, the utility model is realized by the following technical scheme:

[0006] A universal split mold for gear forgings includes an upper backing plate and a lower backing plate corresponding to each other. An upper mold assembly is fixedly connected to the bottom of the upper backing plate, and a lower mold assembly is fixedly connected to the top of the lower backing plate. The upper and lower mold assemblies are vertically corresponding and embedded in each other. The upper mold assembly consists of a universal upper circular plate and an upper die. The universal upper circular plate is fixedly installed on the bottom surface of the upper backing plate, and the upper die is fixedly installed on the bottom surface of the universal upper circular plate, with an upper die forging surface on its bottom surface. The lower mold assembly includes a universal outer mold sleeve, which is fixedly installed on the top surface of the lower backing plate. A connecting hole is located at the center of the universal outer mold sleeve, and the outer periphery of the universal upper circular plate matches the upper contour of the connecting hole, allowing the universal upper circular plate to be inserted downwards into the connecting hole. A universal lower circular plate is located on the lower backing plate within the connecting hole, engaging with the connecting hole. A lower die is located on the top of the universal lower circular plate, corresponding vertically to the upper die, with a lower die forging surface on its top surface.

[0007] Furthermore, a lower mold adjusting plate is provided between the lower mold and the universal lower circular plate, and the lower mold adjusting plate is fixedly connected to the lower mold and the universal lower circular plate by bolts respectively.

[0008] Furthermore, the top of the universal lower circular plate is provided with an inner mold sleeve, which is fitted into the sleeve hole. The center of the inner mold sleeve is provided with an inner mold cavity that is connected vertically. The lower mold is disposed in the inner mold cavity and fits into the inner mold cavity. The outer periphery of the upper mold matches the upper end profile of the inner mold cavity, and the upper mold can be fitted into the inner mold cavity.

[0009] Furthermore, the lower mold has a concave cavity at its top center, a top head that is embedded and fitted inside the cavity, and a material ejection hole that penetrates the lower pad at the bottom center of the cavity. A push rod that is clearance-fitted inside the material ejection hole is provided, and the upper end of the push rod is fixedly connected to the top head.

[0010] Furthermore, the bottom center of the upper pad is provided with an upwardly recessed upper centering groove, and the upper end of the universal upper circular plate is embedded in the upper centering groove, and it is fixedly connected to the upper pad by bolts.

[0011] Furthermore, the bottom center of the lower pad is provided with a recessed lower center groove, and the bottom of the universal outer mold sleeve is provided with a limiting protrusion that fits into the lower center groove.

[0012] Furthermore, the outer surface of the inner mold sleeve is an inclined surface that slopes outwards towards the bottom, and this inclined surface constitutes a first limiting surface. The wall contour structure of the sleeve hole matches the structural contour of the first limiting surface.

[0013] Furthermore, the outer surface of the lower mold adjusting plate is an inclined surface that slopes outwards towards the bottom, and this inclined surface constitutes a second limiting surface. The contour structure of the inner mold cavity wall near the bottom matches the contour structure of the second limiting surface.

[0014] Furthermore, both the upper and lower pads are provided with lifting holes.

[0015] Compared with the prior art, the advantages of this utility model are: this universal split mold for gear forgings adopts a split structure system, which divides the overall large mold into small modules of different sizes and specifications. These modules are assembled together to produce gear forgings of different sizes and specifications. When the diameter and height of the gear forgings vary within a certain range, only some modules need to be adjusted or replaced to achieve quick mold installation and forging production, making it flexible in use. By changing the upper and lower molds, other forgings can be forged, making it highly versatile. Compared with the integral mold, the split mold system greatly reduces the mold investment cost for different forgings, and the production and processing difficulty of small-sized molds is greatly reduced. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a side view of a universal split mold for gear forgings according to this utility model;

[0018] Figure 2 yes Figure 1 Structural cross-sectional view of AA;

[0019] Figure 3 yes Figure 2 Enlarged view of the structure of B in the middle.

[0020] In the diagram: 1. Upper pad; 11. Upper center groove; 2. Lower pad; 21. Lower center groove; 3. Upper mold assembly; 31. Universal upper circular plate; 32. Upper mold; 4. Lower mold assembly; 41. Universal outer mold sleeve; 411. Sleeve hole; 412. Limiting protrusion; 42. Universal lower circular plate; 43. Inner mold sleeve; 431. Inner mold cavity; 432. First limiting surface; 44. Lower adjusting circular plate; 441. Second limiting surface; 45. Lower mold; 451. Cavity; 5. Top head; 51. Top rod; 52. Unloading hole; 6. Lifting hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships commonly used when the product of the present invention is in use, they are only for the convenience of describing the present 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, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] Furthermore, the use of terms such as "horizontal" or "vertical" does not imply that the component must be absolutely horizontal or vertical, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure or component must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0025] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0026] Example

[0027] Please refer to the instruction manual attached. Figure 1 and 2 As shown, the instruction manual is attached. Figure 1 and 2 The image shows a universal split mold for gear forgings, suitable for forging production and processing, used in conjunction with a forging hydraulic press. This universal split mold for gear forgings includes an upper pad 1 and a lower pad 2, which are correspondingly positioned. The upper pad 1 is bolted to the hammer head of the forging hydraulic press, which drives the upper pad to move up and down via the hammer head. The lower pad 2 is bolted to the lower template of the forging hydraulic press. For easy assembly and disassembly, both the upper pad 1 and the lower pad 2 are provided with lifting holes 6 for convenient lifting. An upper mold assembly 3 is fixedly connected to the bottom of the upper pad 1, and the upper mold assembly 3 can move up and down synchronously with the upper pad 1. (See attached specification). Figure 1 and 2 As shown, the upper module 3 consists of a universal upper circular plate 31 and an upper mold 32. The universal upper circular plate 31 is a universal component, which is fixedly installed on the bottom surface of the upper pad 1 by bolts. Its position is fixed and it cannot be replaced. The diameter of the universal upper circular plate 31 is smaller than the diameter of the upper pad 1. The part of the bottom surface of the upper pad 1 located outside the universal upper circular plate 31 constitutes a limiting part for limiting the descent height of the upper pad 1. In order to facilitate the quick installation of the universal upper circular plate 31 on the upper pad 1 and ensure the accuracy of the installation position, the bottom center of the upper pad 1 is provided with an upwardly concave upper centering section. The upper end of the universal upper circular plate 31 is embedded in the upper centering groove 11, and it is fixedly connected to the upper pad plate 1 by bolts. The upper centering groove 11 facilitates the quick installation and positioning of the universal upper circular plate 31 on the upper pad plate 1, ensuring that the horizontal position of the universal upper circular plate 31 will not shift during processing, thus guaranteeing the accuracy of the forging process. The upper die 32 is fixedly installed at the center of the bottom surface of the universal upper circular plate 31 by bolts. The bottom surface of the upper die 32 is provided with an upper forging profile for forging one side of the gear. (See attached instruction manual.) Figure 2 and 2 As shown, the lower pad 2 has a lower module 4 fixedly connected to its top. The upper module 3 corresponds to and is embedded in the lower module 4. For details, please refer to the appendix of the instruction manual. Figure 3As shown, the lower module 4 includes a universal outer mold sleeve 41. This universal outer mold sleeve 41 is a universal component, which is fixedly installed on the top surface of the lower pad 2 by bolts. Its position is fixed and does not need to be replaced. The center of the universal outer mold sleeve 41 is provided with a connecting hole 411. The thickness between the inner wall of the connecting hole 411 and the outer side of the universal outer mold sleeve 41 is relatively large to ensure the strength of the entire mold system. It should be noted that the outer diameter and outer periphery of the universal upper circular plate 31 are close to the upper part of the connecting hole 411. The diameter and contour of the end portion match, and the universal upper circular plate 31 can enter the sleeve hole 411 downwards and be limited in height by the bottom surface of the upper pad plate 1 against the top surface of the universal outer mold sleeve 41. In order to facilitate the quick installation and positioning of the universal outer mold sleeve 41 on the lower pad plate 2 and ensure its installation accuracy, the top center of the lower pad plate 2 is provided with a recessed lower fixing groove 21, and the bottom of the universal outer mold sleeve 41 is provided with a limiting protrusion 412 that fits into the lower fixing groove 21. The universal outer mold sleeve 41 is assembled into the lower positioning groove 21 via a limiting protrusion 412 at its bottom. The mutually cooperating limiting protrusion 412 and lower positioning groove 21 can limit the horizontal position of the universal outer mold sleeve 41 on the lower pad 2, preventing any offset. This also ensures the assembly accuracy of the universal outer mold sleeve 41 on the lower pad 2 and guarantees the accuracy of the vertical fit between the upper module 3 and the lower module 4. The lower pad 2 has a portion located within the socket 411 that corresponds to the socket 411. A universal lower circular plate 42 is fitted with a sleeve. The outer side of the universal lower circular plate 42 is tapered and inclined outward towards the bottom. Correspondingly, the part of the sleeve hole 411 near the lower end matches the structure of the outer side of the universal lower circular plate 42. The height of the universal lower circular plate 42 can be limited by the universal outer mold sleeve 41. A lower mold 45 is provided on the top of the universal lower circular plate 42. The lower mold 45 corresponds to the upper mold 32 vertically. Its top surface is provided with a lower forging surface for forming the other side of the gear.

[0028] To adjust the height of the forging within the sleeve hole 411 for easier production, a lower die adjusting plate 44 is provided between the lower die 45 and the universal lower circular plate 42. Different thicknesses of the lower die adjusting plate 44 can be used depending on the height of the forging. The lower die adjusting plate 44 is bolted to the lower die 45, and similarly bolted to the universal lower circular plate 42, allowing for easy assembly and disassembly and flexible use. (See attached instruction manual.) ​As shown, the outer surface of the lower die adjusting circular plate 44 is an inclined surface sloping outwards from the bottom. This inclined surface forms a second limiting surface 441, which can match the wall structure above the universal lower circular plate 42 inside the socket hole 411. If the size of the forging being processed is small, an inner die sleeve 43 is provided on the top of the universal lower circular plate 42. The inner die sleeve 43 is fitted inside the socket hole 411. In order to limit the height position of the inner die sleeve 43 fitted inside by the universal outer die sleeve 41 and prevent the forging from being ejected together when demolding, the outer surface of the inner die sleeve 43 is an inclined surface sloping outwards from the bottom and has a taper. This inclined surface forms a first limiting surface 432. Correspondingly, the socket hole 411... The wall contour structure of the inner mold sleeve 43 matches the structural contour of the first limiting surface 432, and the two are fitted together. The inner mold sleeve 43 can be replaced according to different forging sizes, saving about 70% of mold material compared to the overall outer mold sleeve. The center of the inner mold sleeve 43 is provided with an inner mold cavity 431 that is connected vertically. The lower mold 45 is disposed in the inner mold cavity 431 and fitted together with the inner mold cavity 431. In order to match the second limiting surface 441 of the lower mold adjusting plate 44, the contour structure of the inner mold cavity 431 near the bottom matches the contour structure of the second limiting surface 441. The lower mold adjusting plate 44 can be fitted into the inner mold cavity 431 and its height position is limited by the inner mold cavity 431. When the inner mold sleeve 43 is installed on the universal lower circular plate 42, the outer periphery of the upper mold 32 matches the upper end profile of the inner mold cavity 431, and the upper mold 32 can be sleeved inside the inner mold cavity 431. At this time, the diameter of the upper mold 32 is smaller than the diameter of the universal upper circular plate 31, and the part of the bottom surface of the universal upper circular plate 31 located outside the upper mold 32 can abut against the top surface of the inner mold sleeve 43 for height limiting of the upper mold 32. In order to facilitate the demolding of the forging from the lower mold assembly 4, the top center of the lower mold 45 is provided with a concave cavity 451. The cross-section of the cavity 451 is an inverted trapezoidal structure, and a top head 5 is provided inside the cavity 451 for embedded mating. It should be noted that when the top head 5 is completely placed in the cavity 451... When the mold is in the cavity 451, the top surface of the top head 5 is flush with the top surface of the bottom mold 45 and they are integrated. The bottom center of the cavity 451 is provided with a material ejection hole 52 that penetrates the bottom pad 2 downward. The material ejection hole 52 passes through the bottom mold 45, the bottom mold adjusting plate 44, the universal bottom plate 42 and the bottom pad 2 from top to bottom. The material ejection hole 52 is provided with a push rod 51 that is clearance-fitted with it. The upper end of the push rod 51 is fixedly connected to the top head 5 with a threaded connection, and the lower end is fixedly connected to the ejection mechanism on the forging hydraulic press. The ejection mechanism on the forging hydraulic press can drive the push rod 51 and the top head 5 to move up and down. When moving upward, the forging on the top surface of the bottom mold 45 can be ejected above the sleeve hole 411 to realize the demolding of the forging and facilitate unloading.

[0029] This universal split mold for gear forgings adopts a split structure system, which divides the large mold into small modules of different sizes. These modules are assembled together to produce gear forgings of different sizes. When the diameter and height of the gear forgings vary within a certain range, only some modules need to be adjusted or replaced to achieve quick mold installation and forging production, making it flexible in use. By replacing the upper mold 32 and the lower mold 45, other forgings can be produced, demonstrating strong versatility. Compared with the integral mold, the split mold system greatly reduces the mold investment cost for different forgings, and the production and processing difficulty of small-sized molds is also greatly reduced.

[0030] It should be emphasized that the above are merely preferred embodiments of this utility model and are 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, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A universal split mold for gear forgings, comprising an upper pad (1) and a lower pad (2) corresponding to each other, wherein an upper mold assembly (3) is fixedly connected to the bottom of the upper pad (1), and a lower mold assembly (4) is fixedly connected to the top of the lower pad (2), wherein the upper mold assembly (3) and the lower mold assembly (4) are vertically corresponding and embeddedly fitted, characterized in that: The upper module (3) consists of a universal upper circular plate (31) and an upper die (32). The universal upper circular plate (31) is fixedly installed on the bottom surface of the upper pad (1), and the upper die (32) is fixedly installed on the bottom surface of the universal upper circular plate (31). The bottom surface of the upper die has an upper forging surface. The lower module (4) includes a universal outer die sleeve (41). The universal outer die sleeve (41) is fixedly installed on the top surface of the lower pad (2). The center of the sleeve has a connecting hole (411) that is vertically connected. The outer periphery of the universal upper circular plate (31) matches the upper end profile of the connecting hole (411). The universal upper circular plate (31) can... The lower die is fitted into the socket (411) downwards; a universal lower circular plate (42) is provided on the lower pad (2) at the part located in the socket (411) to fit into the socket (411); a lower die (45) is provided on the top of the universal lower circular plate (42); the lower die (45) corresponds to the upper die (32) vertically; a lower die forging surface is provided on its top surface; a lower die adjusting circular plate (44) is provided between the lower die (45) and the universal lower circular plate (42); the lower die adjusting circular plate (44) is fixedly connected to the lower die (45) and the universal lower circular plate (42) by bolts respectively.

2. The universal split mold for gear forgings according to claim 1, characterized in that: The top of the universal lower circular plate (42) is provided with an inner mold sleeve (43), which is fitted into the sleeve hole (411). The center of the inner mold sleeve (43) is provided with an inner mold cavity (431) that is connected vertically. The lower mold (45) is set in the inner mold cavity (431) and fits into the inner mold cavity (431). The outer periphery of the upper mold (32) matches the upper end profile of the inner mold cavity (431), and the upper mold (32) can be fitted into the inner mold cavity (431). The outer side of the lower mold adjusting circular plate (44) is an inclined surface that slopes outward from the bottom. This inclined surface forms a second limiting surface (441). The contour structure of the inner mold cavity (431) wall near the bottom matches the contour structure of the second limiting surface (441).

3. The universal split mold for gear forgings according to claim 1, characterized in that: The lower mold (45) has a concave cavity (451) at the top center, and a top head (5) is provided in the cavity (451) for embedded fitting. The bottom center of the cavity (451) has a material ejection hole (52) that penetrates the lower pad (2) downward. A push rod (51) with clearance fitting is provided in the material ejection hole (52), and the upper end of the push rod (51) is fixedly connected to the top head (5).

4. A universal split mold for gear forgings according to claim 1, characterized in that: The bottom center of the upper pad (1) is provided with an upwardly concave upper centering groove (11), and the upper end of the universal upper round plate (31) is embedded in the upper centering groove (11), and it is fixedly connected to the upper pad (1) by bolts.

5. A universal split mold for gear forgings according to claim 1, characterized in that: The lower pad (2) has a recessed lower center groove (21) at the top center, and the universal outer mold sleeve (41) has a limiting protrusion (412) at the bottom that fits into the lower center groove (21).

6. A universal split mold for gear forgings according to claim 2, characterized in that: The outer surface of the inner mold sleeve (43) is an inclined surface that slopes outward from the bottom. This inclined surface forms the first limiting surface (432). The wall contour structure of the sleeve hole (411) matches the structural contour of the first limiting surface (432).

7. A universal split mold for gear forgings according to claim 1, characterized in that: Both the upper pad (1) and the lower pad (2) are provided with lifting holes (6).

Images