Powder metallurgy bevel gear die

Abstract

The utility model discloses a powder metallurgy bevel gear die, which belongs to the technical field of metallurgy dies and comprises a supporting base, supporting columns are fixedly connected to the periphery of the top end of the supporting base, the top ends of the four supporting columns are fixedly connected with the same top plate, a lower die holder fixedly connected to the top end of the supporting base is arranged among the four supporting columns, and a die cavity is formed in the top end of the lower die holder. An upper pressing die is arranged over the die cavity, and a lifting transmission assembly is connected between the top end of the upper pressing die and the top plate. According to the utility model, through the arrangement of the first depth adjusting assembly, rotation of the worm connected with the transmission shaft through the handle, transmission of the threaded cylinder connected with the worm gear, threaded connection of the threaded cylinder and the stud, and combination of the arrangement of the two guide rods, the lifting disc can ascend or descend in the die cavity, so that the depth adjustment of the lifting disc in the die cavity is met; and when the descending height of the upper pressing die is fixed, the production requirements of bevel gears with different thicknesses can be met, and the application range of the powder metallurgy bevel gear die is greatly widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical molds, and particularly relates to a powder metallurgy bevel gear mold. Background Technique

[0002] The powder metallurgy method is a technical method that directly manufactures various products by processes such as pressing and sintering metal powders, alloy powders, or mixed powders of metals and non-metals. The main characteristics of this method are: it can produce special material products that are difficult or impossible to achieve by conventional metallurgical methods or material processing methods. The main characteristics also include: according to the requirements of the shape and size of the parts and products, the raw materials can be directly made into qualified products without mechanical cutting or with only a little cutting and then can be used.

[0003] In the process of pressing and forming, molds are required. Molds are various dies and tools used in industrial production to obtain the required products by methods such as injection molding, blow molding, extrusion, die casting, or forging, smelting, stamping, etc. In short, a mold is a tool used to make formed articles. This tool is composed of various parts, and different molds are composed of different parts. At the same time, due to the integral stamping of the mold, it saves materials and has high processing accuracy, which is suitable for mass production.

[0004] For a powder metallurgy bevel gear mold with the authorization announcement number of CN218638567U, it includes a lower mold. A mold cavity is arranged inside the lower mold. A tooth groove is arranged inside the mold cavity. A first groove is arranged inside the mold cavity. A vertical rod is installed inside the mold cavity. An upper mold is arranged outside the mold cavity. A second groove is arranged inside the upper mold. A telescopic member is arranged on the upper side of the upper mold.

[0005] Although the above can solve the problems of low efficiency and high machine cost in the prior art, and at the same time, in the later demolding process, it is easy to cause wear to the tooth part of the bevel gear mold, resulting in a decrease in product accuracy and affecting product quality. However, the depth of the mold cavity is fixed. For example, if the height of the upper mold descending into the mold cavity is fixed, the thickness of the bevel gear made of pressed metal powder will be fixed, resulting in a lack of a structure for adjusting the depth of the mold cavity, so that bevel gears of different thicknesses cannot be pressed. In addition, the depth of the tooth groove is fixed, and then the height of the teeth on the pressed bevel gear is fixed, and the height of the teeth cannot be adjusted according to different production requirements. For this reason, we propose a powder metallurgy bevel gear mold. Content of the Utility Model

[0006] The purpose of the utility model is to provide a powder metallurgy bevel gear mold to solve the problems proposed in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A powder metallurgy bevel gear mold, including a support base, support columns are fixedly connected to the periphery of the top of the support base, the tops of the four support columns are fixedly connected to the same top plate, a lower mold base fixedly connected to the top of the support base is provided between the four support columns, a mold cavity is opened at the top of the lower mold base, an upper pressing mold is provided directly above the mold cavity, and a lifting transmission assembly is connected between the top of the upper pressing mold and the top plate, and the lifting transmission assembly is used for the lifting action of the upper pressing mold;

[0008] A lifting plate is slidably arranged inside the mold cavity, a groove a is opened at the center of the top of the lifting plate, a vertical rod is fixedly connected to the center of the inside of the groove a, and a plurality of tooth grooves are opened at the edge of the top of the lifting plate around the groove a, and a through hole matching the vertical rod is opened on the upper pressing mold;

[0009] A first depth adjustment component, which is installed at the bottom end of the lifting plate and is connected to the support base and the lower mold base, and is used to realize the depth adjustment of the lifting plate in the mold cavity;

[0010] A second depth adjustment component, which is installed on the vertical rod and the lifting plate and is connected to the inside of a plurality of tooth grooves, and is used to realize the depth adjustment of the tooth grooves.

[0011] It should be noted in the solution that the through hole is provided so that the upper pressing mold is not blocked by the vertical rod during the downward movement, and a groove b is also opened at the bottom end of the upper pressing mold, which is the same as the second groove mentioned in a powder metallurgy bevel gear mold with the authorization announcement number CN218638567U.

[0012] Furthermore, it is worth noting that the first depth adjustment component is used to adjust the depth of the lifting plate in the mold cavity, so that when the upper pressing mold reaches the mold cavity and the telescopic length of the hydraulic cylinder is fixed, the upper pressing mold is pushed into the mold cavity, and the top of the upper pressing mold is flush with the top of the lower mold base. Then, by adjusting the height of the lifting plate differently, the thickness of the pressed metal powder bevel gear can be different. The second depth adjustment component is used to synchronously adjust the depth of a plurality of tooth grooves, so that the heights of a plurality of teeth on the pressed bevel gear can be adjusted, so that the mold can meet the production requirements of different bevel gears for use.

[0013] As a preferred implementation manner, the lifting transmission assembly includes a hydraulic cylinder fixedly connected to the top of the top plate, the telescopic end of the hydraulic cylinder movably penetrates through the top plate and is fixedly connected to a connecting plate, and connecting columns are fixedly connected to the peripheries of the bottom edge of the connecting plate, and the tops of the four connecting columns are fixedly connected to the edge of the top of the upper pressing mold.

[0014] As a preferred embodiment, the first depth adjustment component includes a stud fixedly connected to the center of the bottom end of the lifting disc. A threaded cylinder is sleeved on the outer side of the stud. The bottom end of the stud extends movably into a cavity provided inside the support base. The threaded cylinder is rotatably connected to the inner sides of the support base and the lower die base through bearings. A worm gear is fixedly connected to the outer side of the threaded cylinder. A worm is meshed and connected to the outer side of the worm gear. The worm is rotatably connected to the cavity through a transmission shaft. The front end of the transmission shaft extends to the front side of the support base and is fixedly connected to a handle.

[0015] As a preferred embodiment, guide rods fixedly connected to the bottom end of the lifting disc are provided on both sides of the threaded cylinder. The cross sections of the guide rods are all square structures. The bottom ends of the guide rods all extend movably into the cavity.

[0016] As a preferred embodiment, the second depth adjustment component includes lifting blocks slidably arranged in each tooth alveolus. A hand-tightening screw is rotatably connected to the inner side of the vertical rod. The bottom end of the hand-tightening screw extends into a moving cavity provided inside the lifting disc and is rotatably connected to the inner bottom wall of the moving cavity.

[0017] As a preferred embodiment, a round block is threadedly connected to the threaded part on the outer side of the hand-tightening screw. A plurality of L-shaped rods arranged in an annular array are fixedly connected to the outer side of the round block. The top ends of the L-shaped rods all extend movably into the tooth alveolus and are fixedly connected to the bottom end of the lifting block. The top end of the hand-tightening screw extends to the top of the vertical rod and is fixedly connected to a knob.

[0018] Compared with the prior art, a powder metallurgy bevel gear mold provided by the present utility model has at least the following beneficial effects:

[0019] (1) Through the provided first depth adjustment component, the worm connected to the transmission shaft is rotated through the handle, and the threaded cylinder connected to the worm gear is driven. Since the threaded cylinder is threadedly connected to the stud, combined with the arrangement of the two guide rods, the lifting disc can be lifted or lowered in the mold cavity, so as to meet the adjustment of the depth of the lifting disc in the mold cavity. Furthermore, when the descending height of the upper mold is fixed, the production requirements of bevel gears with different thicknesses can be met, greatly improving the application range of the powder metallurgy bevel gear mold;

[0020] (2) Through the provided second depth adjustment component, the hand-tightening screw is rotated through the knob. Since the threaded part on the outer side of the hand-tightening screw is threadedly connected to the round block, and combined with the action of the plurality of L-shaped rods, the round block will drive the plurality of L-shaped rods to lift or lower, then drive the plurality of lifting blocks to lift or lower in the tooth alveolus, so as to facilitate the synchronous adjustment of the depths of the plurality of tooth alveoli. Furthermore, the amount of metal powder entering the tooth alveoli can be controlled, so as to facilitate adjustment and use according to different bevel gear production requirements, further expanding the application range. Description of the Drawings

[0021] Figure 1It is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0022] Figure 2 It is a schematic three-dimensional structure diagram of the top plate, lower die holder and support base of the present utility model after sectioning and unfolding;

[0023] Figure 3 It is a schematic front view plane structure diagram of the top plate, lower die holder and support base of the present utility model after sectioning and unfolding;

[0024] Figure 4 It is a schematic enlarged structure diagram of part A of the present utility model.

[0025] In the figure: 1. Support base; 2. Support column; 3. Top plate; 31. Hydraulic cylinder; 32. Connecting plate; 33. Connecting column; 34. Upper pressing die; 35. Perforation; 4. Lower die holder; 41. Mold cavity; 5. Lifting disc; 51. Tooth alveolar groove; 52. Vertical rod; 6. First depth adjustment component; 61. Stud; 62. Threaded barrel; 63. Worm gear; 64. Worm; 65. Transmission shaft; 66. Guide rod; 7. Second depth adjustment component; 71. Lifting block; 72. L-shaped rod; 73. Round block; 74. Hand-tightening screw; 75. Moving cavity. Specific embodiments

[0026] The following further describes the present utility model in conjunction with embodiments.

[0027] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art belonging to the field of the present disclosure. The terms such as "including" or "comprising" used in the present disclosure mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0029] Embodiment

[0030] Regarding a powder metallurgy bevel gear mold with the authorized announcement number CN218638567U, although it can solve the problems of low efficiency and high machine cost in the prior art, and during the later demolding process, it is easy to cause wear to the tooth part of the bevel gear mold, resulting in reduced product precision and affecting product quality. However, the depth of the mold cavity 41 is fixed. For example, the height at which the upper press mold 34 descends into the mold cavity 41 is fixed, which makes the thickness of the bevel gear made of pressed metal powder fixed. As a result, there is a lack of a structure for adjusting the depth of the mold cavity 41, so that bevel gears of different thicknesses cannot be pressed. In addition, the depth of the tooth alveolus 51 is fixed, and thus the height of the tooth on the pressed bevel gear is fixed, and the height of the tooth cannot be adjusted according to different production requirements.

[0031] Please refer to Figures 1-4 , the present utility model provides a powder metallurgy bevel gear mold, including: a support base 1, support columns 2 are fixedly connected to the periphery of the top end of the support base 1, the top ends of the four support columns 2 are fixedly connected to the same top plate 3, a lower mold base 4 fixedly connected to the top end of the support base 1 is arranged between the four support columns 2, a mold cavity 41 is opened at the top end of the lower mold base 4, an upper press mold 34 is arranged directly above the mold cavity 41, and a lifting transmission assembly is connected between the top end of the upper press mold 34 and the top plate 3, and the lifting transmission assembly is used for the lifting action of the upper press mold 34;

[0032] A lifting plate 5 is slidably arranged inside the mold cavity 41, a groove a is opened at the center of the top end of the lifting plate 5, a vertical rod 52 is fixedly connected to the center of the inside of the groove a, and a plurality of tooth alveoli 51 opened at the edge of the top end of the lifting plate 5 are arranged around the groove a. A through hole 35 matching with the vertical rod 52 is opened on the upper press mold 34;

[0033] A first depth adjustment component 6, which is installed at the bottom end of the lifting plate 5 and is connected to the support base 1 and the lower mold base 4, is used to realize the depth adjustment of the lifting plate 5 in the mold cavity 41;

[0034] A second depth adjustment component 7, which is installed on the vertical rod 52 and the lifting plate 5 and is connected to the inside of a plurality of tooth alveoli 51, is used to realize the depth adjustment of the tooth alveoli 51.

[0035] Furthermore, as Figures 1-2 shown, it is specifically worth noting that the setting of the through hole 35 is to prevent the upper press mold 34 from being blocked by the vertical rod 52 during the downward movement. A groove b is also opened at the bottom end of the upper press mold 34, which is the same as the second groove mentioned in a powder metallurgy bevel gear mold with the authorized announcement number CN218638567U.

[0036] Furthermore, as Figures 2-4As shown, it is worth specifically explaining that the first depth adjustment component 6 is used to adjust the depth of the lifting plate 5 in the mold cavity 41. When the upper pressing mold 34 enters the mold cavity 41 and the telescopic length of the hydraulic cylinder 31 is fixed, the upper pressing mold 34 is pushed into the mold cavity 41, and the top end of the upper pressing mold 34 is flush with the top end of the lower mold base 4. Furthermore, by adjusting the height of the lifting plate 5 differently, the thickness of the metal powder bevel gear formed by pressing can be made different. The second depth adjustment component 7 is used to synchronously adjust the depths of multiple tooth grooves 51, so that the heights of multiple teeth on the bevel gear formed by pressing can be adjusted, so that the mold can meet different production requirements of bevel gears for use.

[0037] This solution has the following working process: First, fill the metal powder into the mold cavity 41 in the lower mold base 4. Through the setting of the hydraulic cylinder 31, the telescopic end of the hydraulic cylinder 31 drives the upper pressing mold 34 to press down, and the vertical rod 52 passes through the through hole 35, so that the upper pressing mold 34 is pressed into the mold cavity 41 to press and form the metal powder in the mold cavity 41. Through the setting of multiple tooth grooves 51, the bottom of the formed part presents teeth distributed in a circumferential array. Through the setting of groove a and groove b, annular protrusions are formed at the central positions on both the upper and lower sides of the formed part. And due to the setting of the vertical rod 52, an inner ring is formed on the formed part. Finally, the bevel gear is pressed and formed by this mold. In addition, on the one hand, when the depth of the mold cavity 41 needs to be adjusted, the height of the lifting plate 5 can be adjusted through the first depth adjustment component 6. On the other hand, when the depths of multiple tooth grooves 51 need to be synchronously adjusted, the depths inside multiple tooth grooves 51 can be synchronously adjusted through the second depth adjustment component 7.

[0038] According to the above working process, it can be seen that: on the one hand, the lifting plate 5 can be lifted or lowered in the mold cavity 41 through the first depth adjustment component 6, so as to meet the adjustment of the depth of the lifting plate 5 in the mold cavity 41. Furthermore, when the descending height of the upper pressing mold 34 is fixed, it can meet the production requirements of bevel gears with different thicknesses, greatly improving the application range of this powder metallurgy bevel gear mold. On the other hand, the depths of multiple tooth grooves 51 can be synchronously adjusted through the second depth adjustment component 7, so that the amount of metal powder entering the tooth grooves 51 can be controlled, thus facilitating adjustment and use according to different production requirements of bevel gears, and further expanding the application range.

[0039] Furthermore, as Figures 1-3 shown, it is worth specifically explaining that in order to facilitate the lifting action of the upper pressing mold 34, a lifting transmission component is provided, which includes a hydraulic cylinder 31 fixed to the top of the top plate 3. The telescopic end of the hydraulic cylinder 31 movably penetrates the top plate 3 and is fixed with a connecting plate 32. Connecting columns 33 are fixed to the four circumferential edges at the bottom end of the connecting plate 32. The top ends of the four connecting columns 33 are fixedly connected to the top edge of the upper pressing mold 34.

[0040] Furthermore, asFigure 4 As shown, it is worth specifically stating that in order to adjust the depth of the lifting plate 5 in the mold cavity 41, a first depth adjustment component 6 is provided, which includes a stud 61 fixedly connected to the center of the bottom end of the lifting plate 5. A threaded barrel 62 is sleeved on the outer side of the stud 61 in a threaded manner. The bottom end of the stud 61 extends movably into a cavity provided inside the support base 1. The threaded barrel 62 is rotatably connected to the inner sides of the support base 1 and the lower mold base 4 through bearings. A worm gear 63 is fixedly connected to the outer side of the threaded barrel 62. A worm 64 is meshed and connected to the outer side of the worm gear 63. The worm 64 is rotatably connected to the cavity through a transmission shaft 65. The front end of the transmission shaft 65 extends to the front side of the support base 1 and is fixedly connected with a handle. Guide rods 66 fixedly connected to the bottom end of the lifting plate 5 are provided on both sides of the threaded barrel 62. The cross sections of the guide rods 66 are all square structures. The bottom ends of the guide rods 66 all extend movably into the cavity.

[0041] Among them, the setting of the guide rods 66 enables the lifting plate 5 to only move up or down, restricting the rotational movement of the lifting plate 5 in the mold cavity 41.

[0042] Furthermore, as Figure 4 shown, it is worth specifically stating that in order to facilitate the adjustment of the depths of multiple tooth alveoli 51, a second depth adjustment component 7 is provided, which includes lifting blocks 71 slidably arranged in each tooth alveolus 51. A hand-tightening screw 74 is rotatably connected to the inner side of the vertical rod 52. The bottom end of the hand-tightening screw 74 extends into a moving cavity 75 provided inside the lifting plate 5 and is rotatably connected to the inner bottom wall of the moving cavity 75. A round block 73 is threadedly connected to the threaded part on the outer side of the hand-tightening screw 74. A plurality of L-shaped rods 72 arranged in an annular array are fixedly connected to the outer side of the round block 73. The top ends of the L-shaped rods 72 all extend movably into the tooth alveolus 51 and are fixedly connected to the bottom end of the lifting block 71. The top end of the hand-tightening screw 74 extends to the top of the vertical rod 52 and is fixedly connected with a knob;

[0043] Among them, the threaded part on the outer side of the hand-tightening screw 74 is only limited to the length between the inner top wall and the inner bottom wall of the moving cavity 75, as can be seen in the appendix; the length and width of the lifting block 71 are equal to the length and width of the tooth alveolus 51. Figure 4 As can be seen in the appendix; the length and width of the lifting block 71 are equal to the length and width of the tooth alveolus 51.

[0044] In summary, when it is necessary to raise or lower the lifting plate 5 in the mold cavity 41 through the first depth adjustment component 6, the worm 64 connected to the transmission shaft 65 can be rotated by the handle, and the threaded cylinder 62 connected to the worm gear 63 can be driven. Since the threaded cylinder 62 is threadedly connected to the stud 61, combined with the arrangement of the two guide rods 66, the lifting plate 5 can be raised or lowered in the mold cavity 41, so as to meet the adjustment of the depth of the lifting plate 5 in the mold cavity 41. Furthermore, when the descending height of the upper mold 34 is fixed, the production requirements of bevel gears with different thicknesses can be met, greatly improving the application range of the powder metallurgy bevel gear mold. Secondly, when it is necessary to synchronously adjust the depths of multiple tooth grooves 51, the hand-tightening screw rod 74 can be rotated by the knob. Since the outer threaded part of the hand-tightening screw rod 74 is threadedly connected to the round block 73, and combined with the action of multiple L-shaped rods 72, the round block 73 will drive the multiple L-shaped rods 72 to rise or fall, driving the multiple lifting blocks 71 to rise or fall in the tooth grooves 51, so as to facilitate the synchronous adjustment of the depths of the multiple tooth grooves 51. Furthermore, the amount of metal powder entering the tooth grooves 51 can be controlled, so as to facilitate adjustment and use according to different bevel gear production requirements, further expanding the application range.

[0045] The hydraulic cylinder 31 can be purchased on the market. The hydraulic cylinder 31 is equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so it will not be repeated in the specification.

Claims

1. A powder metallurgy bevel gear die, comprising a support base (1), the top of the support base (1) is fixedly connected with support columns (2) all around, the tops of the four support columns (2) are fixedly connected to the same top plate (3), a lower die base (4) fixedly connected to the top of the support base (1) is arranged between the four support columns (2), a die cavity (41) is opened at the top of the lower die base (4), and an upper die (34) is arranged directly above the die cavity (41), characterized in that: A lifting transmission assembly is connected between the top end of the upper die (34) and the top plate (3), and the lifting transmission assembly is used for the lifting action of the upper die (34); A lifting plate (5) is slidably arranged inside the mold cavity (41), a groove a is provided at the center of the top end of the lifting plate (5), a vertical rod (52) is fixedly connected to the center of the inner side of the groove a, a plurality of tooth grooves (51) are arranged around the groove a at the edge of the top end of the lifting plate (5), and a through hole (35) matching with the vertical rod (52) is provided on the upper die (34); A first depth adjustment component (6), which is installed at the bottom end of the lifting plate (5) and is connected to the support base (1) and the lower mold base (4), and is used to achieve depth adjustment of the lifting plate (5) in the mold cavity (41); A second depth adjustment component (7) is installed on the vertical rod (52) and the lifting plate (5), and is connected to the inner side of the plurality of tooth grooves (51), and is used to achieve depth adjustment of the tooth grooves (51).

2. A powder metallurgy bevel gear die according to claim 1, characterized in that: The lifting transmission assembly comprises a hydraulic cylinder (31) fixedly connected to the top of the top plate (3); the telescopic end of the hydraulic cylinder (31) movably passes through the top plate (3) and is fixedly connected to a connecting plate (32); connecting columns (33) are fixedly connected around the bottom edge of the connecting plate (32); the top ends of the four connecting columns (33) are fixedly connected to the top edge of the upper die (34).

3. A powder metallurgy bevel gear die according to claim 1, characterized in that: The first depth adjustment assembly (6) comprises a stud (61) fixed at the center of the bottom end of the lifting plate (5); a threaded sleeve (62) is provided on the outer threaded sleeve of the stud (61); the bottom end of the stud (61) movably extends into a cavity provided on the inner side of the support base (1); the threaded sleeve (62) is rotatably connected to the support base (1) and the inner side of the lower mold base (4) through a bearing; a worm gear (63) is fixed to the outer side of the threaded sleeve (62); a worm (64) is meshingly connected to the outer side of the worm gear (63); the worm (64) is rotatably connected to the cavity through a transmission shaft (65); the front end of the transmission shaft (65) extends to the front side of the support base (1) and is fixed to a handle.

4. A powder metallurgy bevel gear die according to claim 3, characterized in that: Both sides of the threaded cylinder (62) are provided with guide rods (66) fixed to the bottom end of the lifting plate (5), the cross-section of the guide rods (66) is a square structure, and the bottom ends of the guide rods (66) are movably extended into the cavity.

5. The powder metallurgy bevel gear mold according to claim 1, characterized in that: The second depth adjustment assembly (7) comprises a lifting block (71) slidably arranged in each tooth groove (51); the inner side of the vertical rod (52) is rotatably connected to a hand screw (74); the bottom end of the hand screw (74) extends into a movable cavity (75) arranged on the inner side of the lifting plate (5) and is rotatably connected to the inner bottom wall of the movable cavity (75).

6. A powder metallurgy bevel gear die according to claim 5, characterized in that: A round block (73) is threadedly connected to the outer threaded portion of the hand-tightened screw rod (74), and a plurality of L-shaped rods (72) arranged in a circular array are fixedly connected to the outer side of the round block (73). The top ends of the L-shaped rods (72) are movably extended into the tooth grooves (51) and are fixedly connected to the bottom end of the lifting block (71).

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