Powder metallurgy gear press forming device capable of powder recycling

Abstract

The application discloses a powder metallurgy gear press forming device capable of recycling excess powder, and relates to the technical field of gear pressing. Metal powder is first injected into the inside of a powder adding device, and then the powder adding device injects the metal powder into the inside of a lower mold. Then, a first electric push rod controls an upper mold to extrude the lower mold. After the upper mold and the lower mold are closed, the upper mold and the lower mold play a role in press forming. In addition, a lot of metal powder is easily left in the process of powder adding and in the inner cavity of the lower mold. Therefore, a recycling device is used to absorb the powder in the inner cavity of the lower mold, so that subsequent recycling and utilization are facilitated, equipment operation cost is reduced, powder scattering dust is reduced, the workshop operation environment is improved, dust pollution is reduced, resource waste caused by random disposal of excess powder is avoided, powder circulation utilization is realized, safety hidden dangers caused by powder accumulation are reduced, and on-site tidy management is facilitated.

Description

Technical Field

[0001] This invention relates to the field of gear pressing technology, specifically to a powder metallurgy gear pressing and forming device capable of recovering residual powder. Background Technology

[0002] Powder metallurgy gears are gear components made by pressing metal powder into gear blanks through molds and then sintering them at high temperatures to achieve metallurgical bonding of powder particles. Relying on powder molding, complete tooth shapes can be directly formed in one piece without extensive cutting and machining. The powder sintering forms a continuous metal matrix and has specified mechanical and wear-resistant properties. It is a transmission gear prepared by near-net-shape forming process.

[0003] In the existing technology, powder metallurgy gear pressing and molding devices that can recover residual powder need to recover powder at multiple points during operation, resulting in low recovery efficiency and poor recovery quality. Fine powder is easily mixed into mold wear debris during long-term circulation, and hard impurities enter the mold cavity when screening fails, which will aggravate mold wear and scratch the gear blank. Therefore, a new design has been carried out to address these issues. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides the following technical solution: a powder metallurgy gear pressing and forming device capable of recovering residual powder, comprising:

[0005] The work platform has a square block structure and fixed support legs set at the bottom of the square block. A lower mold is fixedly connected to the center of the top of the work platform. A powder feeding device is fixedly connected to the top of the work platform near the lower mold. A recycling device is fixedly connected to one side of the top of the work platform.

[0006] The support column has a columnar block structure. The bottom of the support column is fixedly connected to the four corners of the top of the work platform. The top of the support column is fixedly connected to the work top plate. The top of the work top plate is fixedly connected to the center position of the first electric push rod. The output end of the first electric push rod is fixedly connected to the upper mold.

[0007] The powder adding device includes:

[0008] A powder filling shell, which has a trapezoidal shell structure, and a shell slot is opened inside the powder filling shell at a position corresponding to the inner cavity of the lower mold.

[0009] A guide rod is installed on the top of the powder filling housing. The bottom of the guide rod is fixedly connected to the top of the powder filling housing. A sliding block is slidably connected to the outside of the guide rod, and a powder loading mechanism is fixedly connected to the opposite side of the sliding block.

[0010] The powder adding device further includes:

[0011] A first feeder is disposed outside the powder feeding housing, and the outside of the first feeder is fixedly connected to the side of the powder feeding housing;

[0012] The baffle has a folded plate structure. The bottom of the baffle is on the side of the top of the powder feeding housing away from the powder loading mechanism. The first feeder is fixedly connected to the outside of the first interface.

[0013] The powder loading mechanism includes a powder loading shell, a feed pipe is fixedly connected to the top side of the powder loading shell, a discharge trough is opened on the bottom side of the powder loading shell, and a pusher plate is fixedly connected to the outside of the powder loading shell away from the feed pipe.

[0014] The upper mold includes a mold top plate, an upper module is fixedly connected to the bottom of the mold top plate, an upper mold support is fixedly connected to the outside of the upper module, a positioning rod is fixedly connected to the bottom of the upper mold support, and the outside of the positioning rod is pluggable and adaptable to the outside of the lower mold.

[0015] The lower mold includes a lower mold housing, a mold cavity is provided inside the lower mold housing, a receiving frame is fixedly connected to the outside of the lower mold housing, and a pushing mechanism is fixedly connected inside the mold cavity.

[0016] The positioning rod includes a positioning housing, inside which a first spring is provided, and a positioning block is slidably connected to the inner side of the positioning housing.

[0017] The material pushing mechanism includes a second electric push rod, the outer side of which is fixedly connected to the bottom of the lower mold housing, and an annular bracket is fixedly connected to the output end of the second electric push rod.

[0018] The receiving frame includes a receiving shell, and a shell groove is formed inside the receiving shell. A second spring is fixedly connected to the inner side of the shell groove, and a circular plate is fixedly connected to the other side of the second spring. The outer side of the circular plate is slidably connected to the inner side of the shell groove.

[0019] The recycling device includes a square housing. Gear blocks are rotatably connected to both sides inside the square housing. Connecting belts are fitted on the outer sides of the two gear blocks. A motor is fixedly connected to one side of the top of the square housing. The top of one gear block is fixedly connected to the output end of the motor. A recycling frame is fixedly connected to the top of the other gear block. A connecting block is fixedly connected to the outer side of the recycling frame. A third electric push rod is fixedly connected to the bottom of the connecting block. A recycling tool is fixedly connected to the output end of the third electric push rod.

[0020] The recycling equipment includes a second feeder, a second interface fixedly connected to the center of the outside of the second feeder, an external block fixedly connected to the lower outside of the second feeder, an annular frame inserted into the outside of the external block, and a recycling shell fixedly connected to the bottom of the annular frame.

[0021] This invention provides a powder metallurgy gear pressing and molding device capable of recovering residual powder. It has the following beneficial effects:

[0022] I. This powder metallurgy gear pressing and molding device, which can recover residual powder, keeps the opening of the housing parallel to the inner cavity of the lower mold. The powder loading mechanism is controlled by a sliding block to slide on the guide rod, thereby achieving automatic feeding. The sliding block controls the powder loading mechanism to move towards the opening of the housing, and the powder enters the lower mold from the powder loading mechanism. Then, the sliding block drives the powder loading mechanism to perform reciprocating operation, thereby maintaining the continuous operation of the equipment.

[0023] II. The powder metallurgy gear pressing and forming device capable of recovering residual powder has a vacuum feeder as the first feeder. The first interface is set on the first feeder for connecting to an air compressor. The first feeder is equipped with an absorption port and an ejection port. When the powder is pushed into the concave part of the powder feeding shell by the powder loading mechanism, the powder is sucked in from the absorption port through the first feeder and then ejected from the ejection port, thereby realizing the powder collection operation. The baffle plays a role in preventing powder from scattering, improving the powder collection effect, and optimizing the working environment of the equipment.

[0024] III. This powder metallurgy gear pressing and forming device, capable of recovering residual powder, inputs powder into the powder loading housing through the feed pipe. As the powder continuously accumulates inside the powder loading housing, it moves from one side of the powder loading housing to the side of the discharge chute, thus providing continuous feeding. When the discharge chute moves away from the opening of the housing, it is pressed tightly against the powder loading housing, thereby reducing powder leakage. When the powder loading housing moves towards the opening of the housing, the powder enters the lower mold from the discharge chute, thus achieving automatic feeding. During pressing and forming or reciprocating operations, the pusher plate pushes the powder or workpiece on the powder loading housing, thereby maintaining the normal operation of subsequent equipment.

[0025] IV. This powder metallurgy gear pressing and forming device, capable of recovering residual powder, has an upper module that moves up and down with the extension and retraction of the first electric push rod. The upper module fits into the lower mold to achieve powder pressing and forming. Secondly, the positioning rod moves up and down with the upper module. During the movement, the positioning rod is inserted and unplugged into the lower mold to achieve the function of pre-positioning the component. During the pressing process, it constrains the horizontal displacement of the upper mold, offsets the lateral component force of the stamping, and extends the service life of the mold. When it descends to the bottom, it is precisely limited to achieve a uniform pressure holding distance and improves product consistency.

[0026] V. This powder metallurgy gear pressing and forming device capable of recovering residual powder, when the positioning block enters the receiving frame, it comes into contact with the component, causing the positioning block to slide into the positioning housing, so that the positioning block squeezes and contracts the first spring, thereby playing a role in shock absorption and buffering, buffering the impact of the upper die descending, reducing the instantaneous impact force between the punch and the powder and the die, slowly and evenly applying pressure, allowing the powder in the die cavity to flow fully and fill the tooth groove, ensuring uniform density throughout the blank, improving forming accuracy, absorbing stamping vibration, reducing rigid collision wear of the die, frame and punch, and extending the service life of the die and the whole machine. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the operating platform structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the support column structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the powder-adding shell structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the pusher plate structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the lower mold housing structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the ring-shaped support structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the connecting strip structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the recycling shell structure of the present invention.

[0035] In the diagram: 1. Working platform; 2. First electric push rod; 3. Upper mold; 4. Lower mold; 5. Powder adding device; 6. Recycling device; 7. Working top plate; 8. Support column; 31. Mold top plate; 32. Upper module; 33. Upper mold support; 34. Positioning rod; 341. Positioning housing; 342. First spring; 343. Positioning block; 41. Lower mold housing; 42. Mold cavity; 43. Pushing mechanism; 44. Receiving frame; 431. Second electric push rod; 432. Ring support; 441. Receiving housing; 442. Housing groove; 443. Circular plate; 444. Second spring; 51. Powder filling shell; 52. Shell slot; 53. Powder loading mechanism; 54. Sliding block; 55. Guide rod; 56. Baffle; 57. First feeder; 58. First interface; 531. Powder filling shell; 532. Feed pipe; 533. Discharge chute; 534. Push plate; 61. Square shell; 62. Gear block; 63. Connecting belt; 64. Motor; 65. Recycling frame; 66. Connecting block; 67. Third electric push rod; 68. Recycling tool; 681. Second feeder; 682. Ring frame; 683. Second interface; 684. External block; 685. Recycling shell. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] First embodiment, such as Figures 1 to 2 As shown, the present invention provides a technical solution: a powder metallurgy gear pressing and forming device capable of recycling residual powder, comprising:

[0038] The work platform 1 has a square block structure and fixed support legs set at the bottom of the square block. A lower mold 4 is fixedly connected to the center of the top of the work platform 1. A powder feeding device 5 is fixedly connected to the top of the work platform 1 near the lower mold 4. A recycling device 6 is fixedly connected to one side of the top of the work platform 1.

[0039] The support column 8 has a columnar block structure. The bottom of the support column 8 is fixedly connected to the four corners of the top of the working platform 1. The top of the support column 8 is fixedly connected to the working top plate 7. The first electric push rod 2 is fixedly connected to the center of the working top plate 7. The output end of the first electric push rod 2 is fixedly connected to the upper mold 3. First, metal powder is injected into the powder feeding device 5. The powder feeding device 5 injects metal powder into the lower mold 4. Then, the first electric push rod 2 controls the upper mold 3 to extrude the lower mold 4. After the upper mold 3 and the lower mold 4 are closed, it plays a role in pressing and forming. Secondly, during the powder feeding process and in the inner cavity of the lower mold 4, a lot of metal powder is easily left behind. Therefore, the recycling device 6 absorbs the powder in the inner cavity of the lower mold 4, which facilitates subsequent recycling and reuse, reduces equipment operating costs, reduces powder scattering and dust, improves the workshop working environment, reduces dust pollution, avoids the waste of resources caused by the random disposal of excess powder, realizes the recycling of powder, reduces the safety hazards caused by powder accumulation, and facilitates on-site clean management.

[0040] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 3 to 6 As shown, the powder adding device 5 includes:

[0041] The powder filling shell 51 has a trapezoidal shell structure, and a shell slot 52 is opened inside the powder filling shell 51 at a position corresponding to the inner cavity of the lower mold 4.

[0042] A guide rod 55 is installed on the top of the powder feeding housing 51. The bottom of the guide rod 55 is fixedly connected to the top of the powder feeding housing 51. A sliding block 54 is slidably connected to the outside of the guide rod 55, and a powder loading mechanism 53 is fixedly connected to the opposite side of the sliding block 54. The housing slot 52 is parallel to the inner cavity of the lower mold 4. The powder loading mechanism 53 is controlled to slide on the guide rod 55 by the sliding block 54, thereby achieving automatic feeding. The sliding block 54 controls the powder loading mechanism 53 to move towards the housing slot 52, and the powder enters the lower mold 4 from the powder loading mechanism 53. Then, the sliding block 54 drives the powder loading mechanism 53 to reciprocate, thereby keeping the equipment running continuously.

[0043] The powder adding device 5 also includes:

[0044] The first feeder 57 is disposed outside the powder feeding housing 51 and is fixedly connected to the side of the powder feeding housing 51.

[0045] Baffle 56 has a folded plate structure. The bottom of baffle 56 is located on the side of the top of powder feeding housing 51 away from the powder loading mechanism 53. A first interface 58 is fixedly connected to the outside of the first conveyor 57. The first conveyor 57 is a vacuum conveyor. The first interface 58 is located on the first conveyor 57 for connecting to an air compressor. The first conveyor 57 is provided with an absorption port and an ejection port. When powder is pushed into the concave part of powder feeding housing 51 by the powder loading mechanism 53, the powder is sucked in from the absorption port by the first conveyor 57 and then ejected from the ejection port, thereby realizing the powder collection operation. Baffle 56 plays a role in preventing powder dispersion, improving the powder collection effect, and optimizing the operating environment of the equipment.

[0046] The powder loading mechanism 53 includes a powder loading housing 531. A feed pipe 532 is fixedly connected to the top side of the powder loading housing 531, and a discharge chute 533 is opened on one side of the bottom of the powder loading housing 531. A pusher plate 534 is fixedly connected to the outside of the powder loading housing 531 away from the feed pipe 532. Powder is fed into the powder loading housing 531 through the feed pipe 532. As the powder accumulates inside the powder loading housing 531, it moves from one side of the powder loading housing 531 to the side of the discharge chute 533, thus continuously feeding the powder. When the discharge chute 533 is away from the opening 52 of the housing, it is in close contact with the powder loading housing 51, thereby reducing powder leakage. When the powder loading housing 531 moves towards the opening 52 of the housing, the powder enters the lower mold 4 from the discharge chute 533, thus achieving automatic feeding. During pressing or reciprocating operations, the pusher plate 534 pushes the powder or workpiece on the powder loading housing 51 to maintain the normal operation of subsequent equipment.

[0047] The upper mold 3 includes a mold top plate 31, with an upper module 32 fixedly connected to the bottom of the mold top plate 31. An upper mold support 33 is fixedly connected to the outside of the upper module 32, and a positioning rod 34 is fixedly connected to the bottom of the upper mold support 33. The outer side of the positioning rod 34 is pluggable and adaptable to the outer side of the lower mold 4. The upper module 32 moves up and down with the extension and retraction of the first electric push rod 2, and the upper module 32 is fitted with the lower mold 4 to realize the powder pressing molding operation. Secondly, the positioning rod 34 moves up and down with the upper module 32. During the movement, the positioning rod 34 is pluggable and adaptable to the lower mold 4 to play the role of pre-positioning the component. During the pressing process, it constrains the horizontal displacement of the upper mold, offsets the lateral component force of the stamping, extends the service life of the mold, and accurately limits the downward movement to achieve a uniform holding pressure distance and improve product consistency.

[0048] The lower mold 4 includes a lower mold housing 41, with a mold cavity 42 inside the lower mold housing 41. A receiving frame 44 is fixedly connected to the outside of the lower mold housing 41, and a pushing mechanism 43 is fixedly connected inside the mold cavity 42. The mold cavity 42 inside the lower mold housing 41 is used to load metal powder. When the upper module 32 enters the mold cavity 42, it presses and shapes the workpiece. The receiving frame 44 and the positioning rod 34 are inserted and removed to fit together, thereby positioning the component.

[0049] The positioning rod 34 includes a positioning housing 341, inside which a first spring 342 is installed, and a positioning block 343 is slidably connected to the inner side of the positioning housing 341. When the positioning block 343 enters the receiving frame 44, it comes into contact with the component, causing the positioning block 343 to slide into the positioning housing 341, thus compressing and contracting the first spring 342. This serves as a shock absorber and buffer, buffering the impact of the upper die descending, reducing the instantaneous impact force between the punch and the powder and the die, applying pressure slowly and evenly, allowing the powder in the die cavity to fully flow and fill the tooth grooves, ensuring uniform density throughout the blank, improving molding accuracy, absorbing stamping vibration, reducing rigid collision wear of the die, frame, and punch, and extending the service life of the die and the entire machine.

[0050] The feeding mechanism 43 includes a second electric push rod 431, the outer side of which is fixedly connected to the bottom of the lower mold housing 41, and an annular bracket 432 is fixedly connected to the output end of the second electric push rod 431. After the powder is pressed into shape, the workpiece is inside the mold cavity 42 and is difficult to remove. The second electric push rod 431 controls the annular bracket 432 to lift the workpiece above the mold cavity 42. Then, the push plate 534 pushes the workpiece to move, thereby facilitating subsequent operations.

[0051] The receiving frame 44 includes a receiving housing 441, with a housing groove 442 inside the housing 441. A second spring 444 is fixedly connected to the inner side of the housing groove 442, and a circular plate 443 is fixedly connected to the outer side of the second spring 444. The outer side of the circular plate 443 is slidably connected to the inner side of the housing groove 442. When the positioning block 343 enters the housing groove 442, the positioning block 343 applies pressure to the circular plate 443, which in turn compresses and contracts the second spring 444. This works in conjunction with the positioning rod 34 to achieve a double buffering effect, absorbing the impact force and vibration of the stamping step by step, significantly reducing the collision wear of the punch and gear mold teeth, extending the service life of the mold, reducing the vibration and operating noise of the whole machine, improving the stability of continuous operation of the equipment, and reducing dust splashing, while also assisting in the recovery of residual powder.

[0052] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 7 to 8As shown, the recycling device 6 includes a square housing 61. Gear blocks 62 are rotatably connected to both sides inside the square housing 61. Connecting belts 63 are fitted around the outer sides of the two gear blocks 62. A motor 64 is fixedly connected to one side of the top of the square housing 61. The top of one gear block 62 is fixedly connected to the output end of the motor 64, and the top of the other gear block 62 is fixedly connected to a recycling frame 65. A connecting block 66 is fixedly connected to the outer side of the recycling frame 65. A third electric push rod 67 is fixedly connected to the bottom of the connecting block 66, and a recycling tool 68 is fixedly connected to the output end of the third electric push rod 67. The motor 64 controls the rotation of one gear block 62, which in turn drives the rotation of both gear blocks 62 via the connecting belts 63. The gear block 62 closer to the recycling frame 65 drives the recycling tool 68 to rotate. Moving parts provide operational space for the equipment and prevent obstruction of other components. The distance between the recycling tool 68 and the lower mold 4 is controlled by the third electric push rod 67, thus meeting the operational requirements for powder recycling.

[0053] The recycling device 68 includes a second feeder 681, a second interface 683 fixedly connected to the center of the outside of the second feeder 681, an outer block 684 fixedly connected to the lower outside of the second feeder 681, an annular frame 682 inserted and connected to the outside of the outer block 684, and a recycling shell 685 fixedly connected to the bottom of the annular frame 682. The second feeder 681 is a vacuum conveyor. The second interface 683 is located on the second feeder 681 and is used to connect to an air compressor. The third electric push rod 67 controls the recovery housing 685 to cover the lower mold 4. Then, the powder inside the lower mold 4 is absorbed and the powder is moved from the side near the recovery housing 685 to the other side of the second feeder 681. This achieves the function of collecting powder, removing residual floating powder accumulation in the mold cavity, preventing powder accumulation from causing missing material in the gear teeth, dimensional deviation, and uneven density, ensuring the green blank forming accuracy, avoiding residual clumps of powder from squeezing and scratching the mold teeth, reducing mold wear, extending mold service life, keeping the mold cavity clean, reducing dust overflow, improving the workshop production environment, and simplifying on-site powder management.

[0054] In use, the lower mold 4 is set on the working platform 1, the powder feeding device 5 is set at the same position as the lower mold 4 and partially covers the lower mold 4, and the upper mold 3 is set at the position corresponding to the lower mold 4 on the working top plate 7. Powder is fed into the lower mold 4 through the powder feeding device 5, and then the upper mold 3 is pressed and fitted into the lower mold 4 by the first electric push rod 2 to achieve the purpose of powder pressing and molding.

[0055] The powder feeding device 5 is equipped with a powder loading mechanism 53. During the process of the sliding block 54 driving the powder loading mechanism 53 to move to the lower mold 4, the powder is placed into the lower mold 4. Then, the powder loading mechanism 53 retracts. After being squeezed by the upper mold 3, the powder is pressed into shape inside the lower mold 4.

[0056] The workpiece is pushed out by the pushing mechanism 43 inside the lower mold 4, so that the workpiece is higher than the inside of the lower mold 4. Then, the powder loading mechanism 53 pushes the material to move towards the powder filling shell 51 near the first conveyor 57, thereby achieving the function of discharging the material and facilitating subsequent recycling. At the same time, the powder loading mechanism 53 pushes the powder to move towards the first conveyor 57, and the powder is recycled by the first conveyor 57, thereby realizing the collection of external powder.

[0057] Powder easily accumulates inside the lower mold 4, causing damage to the mold. The recycling device 6 absorbs the powder inside the lower mold 4, thereby cleaning the mold, further improving the powder collection efficiency, and extending the service life of the equipment.

[0058] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

Claims

1. A powder metallurgy gear pressing and forming device capable of recovering residual powder, characterized in that, include: The work platform (1) has a square block structure and fixed support legs set at the bottom of the square block. A lower mold (4) is fixedly connected to the center of the top of the work platform (1). A powder adding device (5) is fixedly connected to the top of the work platform (1) near the lower mold (4). A recycling device (6) is fixedly connected to one side of the top of the work platform (1). Support column (8), which has a columnar block structure, the bottom of the support column (8) is fixedly connected to the top four corners of the work platform (1), the top of the support column (8) is fixedly connected to the work top plate (7), the work top plate (7) is fixedly connected to the center of the top plate, and the output end of the first electric push rod (2) is fixedly connected to the upper mold (3). The powder adding device (5) includes: The powder filling shell (51) has a trapezoidal shell structure, and the powder filling shell (51) has a shell slot (52) at a position corresponding to the inner cavity of the lower mold (4). A guide rod (55) is provided on the top of the powder filling housing (51). The bottom of the guide rod (55) is fixedly connected to the top of the powder filling housing (51). A sliding block (54) is slidably connected to the outside of the guide rod (55). A powder loading mechanism (53) is fixedly connected to the opposite side of the sliding block (54).

2. The powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 1, characterized in that: The powder adding device (5) also includes: The first feeder (57) is disposed outside the powder filling housing (51), and the outside of the first feeder (57) is fixedly connected to the side of the powder filling housing (51); The baffle (56) has a folded plate structure. The bottom of the baffle (56) is away from the top of the powder filling housing (51) on the side away from the powder filling mechanism (53). The first feeder (57) is externally connected to a first interface (58).

3. The powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 2, characterized in that: The powder loading mechanism (53) includes a powder loading shell (531), a feed pipe (532) is fixedly connected to the top side of the powder loading shell (531), a discharge trough (533) is opened on one side of the bottom of the powder loading shell (531), and a pusher plate (534) is fixedly connected to the outside of the powder loading shell (531) away from the feed pipe (532).

4. The powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 1, characterized in that: The upper mold (3) includes a mold top plate (31), an upper module (32) is fixedly connected to the bottom of the mold top plate (31), an upper mold bracket (33) is fixedly connected to the outside of the upper module (32), a positioning rod (34) is fixedly connected to the bottom of the upper mold bracket (33), and the outside of the positioning rod (34) is plugged and matched with the outside of the lower mold (4).

5. The powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 4, characterized in that: The lower mold (4) includes a lower mold housing (41), a mold cavity (42) is provided inside the lower mold housing (41), a support frame (44) is fixedly connected to the outside of the lower mold housing (41), and a pusher mechanism (43) is fixedly connected inside the mold cavity (42).

6. The powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 4, characterized in that: The positioning rod (34) includes a positioning housing (341), a first spring (342) is provided inside the positioning housing (341), and a positioning block (343) is slidably connected to the inner side of the positioning housing (341).

7. A powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 5, characterized in that: The material pushing mechanism (43) includes a second electric push rod (431), the outer side of which is fixedly connected to the bottom of the lower mold housing (41), and the output end of the second electric push rod (431) is fixedly connected to an annular bracket (432).

8. A powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 5, characterized in that: The receiving frame (44) includes a receiving shell (441), and a shell groove (442) is provided inside the receiving shell (441). A second spring (444) is fixedly connected to the inner side of the shell groove (442), and a circular plate (443) is fixedly connected to the other side of the second spring (444). The outer side of the circular plate (443) is slidably connected to the inner side of the shell groove (442).

9. A powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 1, characterized in that: The recycling device (6) includes a square housing (61), with gear blocks (62) rotatably connected to both sides inside the square housing (61). Connecting belts (63) are fitted on the outer sides of the two gear blocks (62). A motor (64) is fixedly connected to one side of the top of the square housing (61). The top of one gear block (62) is fixedly connected to the output end of the motor (64). The top of the other gear block (62) is fixedly connected to a recycling frame (65). A connecting block (66) is fixedly connected to the outer side of the recycling frame (65). A third electric push rod (67) is fixedly connected to the bottom of the connecting block (66). A recycling tool (68) is fixedly connected to the output end of the third electric push rod (67).

10. A powder metallurgy gear pressing and forming device capable of recovering residual powder according to claim 9, characterized in that: The recycling device (68) includes a second feeder (681), a second interface (683) is fixedly connected to the center of the outside of the second feeder (681), an outer block (684) is fixedly connected to the lower outside of the second feeder (681), an annular frame (682) is inserted and connected to the outside of the outer block (684), and a recycling shell (685) is fixedly connected to the bottom of the annular frame (682).

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