Composite powder metallurgy net near forming process device

Abstract

The composite powder metallurgy net near forming process device comprises a base, the upper end of the base is fixedly connected with a machine body, the upper end of the machine body is fixedly connected with a material tank, the inner bottom of the machine body is fixedly connected with a mold main body, and the upper end of the mold main body is provided with a mold groove; a transverse plate is jointly and fixedly connected between the side wall of the mold body and the inner wall of the machine body, and the transverse plate and the upper end of the mold body are horizontal. The device is reasonable in structure, the electric push rod drives the discharging cover to slide along the transverse plate, powder diffusion is limited in cooperation with the baffles on the two sides, uniform-speed and uniform spreading of powder in a die cavity is achieved, local accumulation is avoided, the consistency of the density of workpieces is ensured, in the material pushing process, impact blocks make repeated contact with protruding blocks of the side baffles, periodic lateral impact is generated under the action of springs, and the powder is evenly sprayed out. And in cooperation with mold cavity constraint of the mold groove, the binding force between powder particles is improved, gaps between materials are reduced, and workpiece defects are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder metallurgy forming equipment, and particularly relates to a composite powder metallurgy near-net forming process device. BACKGROUND

[0002] The powder metallurgy near-net forming technology is widely applied in the fields of automobile parts and mechanical structural parts because it can reduce the subsequent machining allowance and material loss. However, the existing powder metallurgy forming device has the following problems in actual application. 1. Uneven distribution: The traditional equipment usually adopts fixed distribution, and the metal powder is easy to accumulate unevenly in the mold groove, which leads to large density difference of the workpiece and affects the mechanical properties of the product. 2. Limited compaction effect: Most devices only rely on one-way compaction of the upper die pressure head, lack of lateral impact assistance, and the combination force between powder particles is insufficient, so that the workpiece is easy to have defects such as delamination and cracking. 3. Low linkage efficiency: The pushing mechanism and the demolding ejection mechanism are usually controlled independently, and the action connection is delayed, which leads to long processing cycle and is difficult to adapt to the automatic production line. 4. Poor conveying connection: The workpiece needs to be manually transferred after demolding, which is easy to cause damage to the workpiece, and cannot form a coherent conveying with the subsequent machining process, which affects the overall production efficiency.

[0003] In view of the above problems, a powder metallurgy forming device with the functions of uniform distribution, composite impact compaction, linkage demolding and automatic conveying is needed to improve the product quality and production efficiency. SUMMARY

[0004] The present application relates to the technical field of powder metallurgy forming equipment, and particularly relates to a composite powder metallurgy near-net forming process device.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: A composite powder metallurgy near-net-shape forming process device includes a base, an organic body fixedly connected to the upper end of the base, a material tank fixedly connected to the upper end of the organic body, a mold body fixedly connected to the inner bottom of the organic body, a mold groove formed at the upper end of the mold body, a horizontal plate fixedly connected between the side wall of the mold body and the inner wall of the organic body, the horizontal plate being horizontal with the upper end of the mold body, and a pushing mechanism for pushing powder material provided at the upper end of the horizontal plate, the pushing mechanism including a feeding cover slidably connected to the upper end of the horizontal plate, the feeding... The cover and the material tank are connected by a conveying mechanism. The lower end of the material discharge cover is open. The horizontal plate and the upper end of the mold body are fixedly connected to two symmetrically arranged side baffles. The two side baffles are located on both sides of the material discharge cover. Multiple equally spaced protrusions are fixedly connected to the opposite ends of the two side baffles. Impact mechanisms for impacting the mold body are provided on both side walls of the material discharge cover. The lower end of the mold body is provided with a lifting cavity. The lifting cavity is provided with an ejection mechanism for ejecting the workpiece in the mold groove.

[0006] Preferably, the conveying mechanism includes a conveying pipe fixedly connected to the lower end of the material tank, and the lower end of the conveying pipe is connected to the material discharge hood through a feeding pipe, wherein the feeding pipe is a corrugated pipe.

[0007] Preferably, the impact mechanism includes a fixed plate fixedly connected to the side wall of the discharge hood. A groove is provided at one end of the fixed plate near the side baffle. A sliding block is slidably connected in the groove. An impact block that cooperates with a protrusion is fixedly connected at one end of the sliding block near the side baffle. The impact block is trapezoidal in design. The side wall of the sliding block and the inner wall of the groove are elastically connected by a spring.

[0008] Preferably, the ejection mechanism includes a second trapezoidal block slidably connected inside the lifting cavity, a sliding rod slidably connected through the inner wall of the lifting cavity, the sliding rod passing through and slidably connected to the inner wall of the mold groove, and a lifting plate that cooperates with the mold groove is fixedly connected to the upper end of the sliding rod, the lifting plate being disposed inside the mold groove, and a first trapezoidal block that cooperates with the second trapezoidal block is fixedly connected to the lower end of the sliding rod.

[0009] Preferably, a through groove is provided on the horizontal plate, and a connecting rod is slidably connected in the through groove. The connecting rod is U-shaped, with one end fixedly connected to the side wall of the material feeding cover and the other end fixedly connected to the end of the second U-shaped block. The connecting rod passes through the side wall of the mold body and is slidably connected to it.

[0010] Preferably, an electric push rod is fixedly connected to the inner wall of the machine body, and the telescopic end of the electric push rod is fixedly connected to the side wall of the discharge hood.

[0011] Preferably, an opening is provided on the side wall of the machine body, and a conveying mechanism is provided in the opening. The conveying mechanism is used for the product after the mold body is processed, and the conveying mechanism extends outside the machine body.

[0012] Preferably, a motor is fixedly connected to the upper end of the material tank, a drive rod is fixedly connected to the output shaft of the motor, a plurality of equally spaced stirring blades are fixedly connected to the side wall of the drive rod, the drive rod extends into the conveying pipe, and a conveying blade is fixedly connected to one end of the drive rod located in the conveying pipe.

[0013] Preferably, an observation window is provided on the front side wall of the machine body, and a compaction mechanism that cooperates with the mold groove is installed on the inner top of the machine body for compacting the material in the mold groove.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: 1. High uniformity of material distribution: The material feeding cover is driven by an electric push rod to slide along the horizontal plate, and the side baffles restrict the diffusion of powder, so as to achieve uniform and even distribution of powder in the mold cavity, avoid local accumulation, and ensure the consistency of workpiece density. 2. Good composite compaction effect: During the feeding process, the impact block and the protrusion of the side baffle repeatedly contact each other, generating periodic lateral impact under the action of the spring. Combined with the cavity constraint of the mold groove, it improves the bonding force between powder particles and reduces workpiece defects. 3. High efficiency of mechanism linkage: The U-shaped connecting rod connects the material feeding cover to the second trapezoidal block. The pushing action drives the ejection mechanism to run synchronously, without the need for independent control, which shortens the demolding time and improves processing efficiency; 4. Automated conveying connection: The conveying mechanism on the side wall of the machine directly receives the ejected workpiece, realizing the integration of "forming-demolding-conveying", avoiding damage caused by manual transfer, and is compatible with automated production lines; 5. Strong structural stability: The base is made of cast iron, the machine body is equipped with reinforcing ribs, and key components are made of high-strength metal materials to ensure structural stability under long-term high-frequency operation and extend the service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a perspective view of a composite powder metallurgy near-net-shape forming process device proposed in this invention; Figure 2 This is a cross-sectional perspective view of a composite powder metallurgy near-net-shape forming process device proposed in this invention. Figure 3 for Figure 2 Enlarged view of the structure at point A in the image; Figure 4 This is a cross-sectional front view of a composite powder metallurgy near-net-shape forming process device proposed in this invention; Figure 5 forFigure 4 Enlarged view of the structure at point B in the image; Figure 6 This is a top cross-sectional view of a composite powder metallurgy near-net-shape forming process device proposed in this invention. Figure 7 for Figure 6 Enlarged view of the structure at point C in the image; Figure 8 This is a front cross-sectional view of the stirring mechanism of a composite powder metallurgy near-net-shape forming process device proposed in this invention.

[0016] In the diagram: 1. Base, 2. Material tank, 3. Machine body, 4. Opening, 5. Conveying mechanism, 6. Observation window, 7. Electric push rod, 8. Horizontal plate, 9. Through groove, 10. Connecting rod, 11. Side baffle, 12. Protrusion, 13. Feeding pipe, 14. Lifting cavity, 15. Sliding rod, 16. First trapezoidal block, 17. Second trapezoidal block, 18. Mold body, 19. Material discharge cover, 20. Mold groove, 21. Fixing plate, 22. Groove, 23. Spring, 24. Sliding block, 25. Impact block, 26. Feed port, 27. Motor, 28. Stirring blade, 29. Drive rod, 30. Conveying blade, 31. Conveying pipe. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Reference Figures 1-8 A composite powder metallurgy near-net-shape forming process device includes a base 1, which is a rectangular cast iron base used to support the overall weight of the device and ensure operational stability; the upper end of the base 1 is fixedly connected to the body 3 by bolts, the body 3 is a closed frame structure, and its inner sidewall is provided with reinforcing ribs to improve structural strength; a material tank 2 is welded and fixed at the center of the upper end of the body 3, the material tank 2 is a conical stainless steel container used to store metal powder raw materials, and its lower end is provided with a material control valve (not marked in the figure) to adjust the powder conveying rate.

[0019] The inner bottom of the machine body 3 is fixedly connected to the mold body 18 by a positioning pin. The mold body 18 is made of high-strength mold steel. Its upper end face is provided with a mold groove 20 that matches the shape of the workpiece. The mold groove 20 is a net near-forming cavity, reducing subsequent processing allowance. The side wall of the mold body 18 and the inner wall of the machine body 3 are fixedly connected by welding to a horizontal plate 8. The horizontal plate 8 is a stainless steel plate. Its upper end face is level with the upper end face of the mold body 18, forming a sliding support surface for the pushing mechanism.

[0020] A pushing mechanism is provided at the upper end of the horizontal plate 8 to uniformly push metal powder into the mold groove 20. The pushing mechanism includes a feeding cover 19 slidably connected to the upper end of the horizontal plate 8. The feeding cover 19 is a rectangular cover with an opening at the lower end and its inner wall is smooth to avoid powder residue. The feeding cover 19 is connected to the material tank 2 through a conveying mechanism. The conveying mechanism includes a conveying pipe 31 (made of stainless steel) fixedly connected to the lower outlet of the material tank 2. The lower end of the conveying pipe 31 is connected to the upper inlet of the feeding cover 19 through a feeding pipe 13. The feeding pipe 13 is a telescopic corrugated pipe adapted to the sliding stroke of the feeding cover 19. The upper ends of the horizontal plate 8 and the mold body 18 are welded together with two symmetrically arranged side baffles 11. The two side baffles 11 are located on both sides of the feeding cover 19 to limit powder diffusion. Multiple equally spaced protrusions 12 (the protrusions 12 are hemispherical structures) are integrally formed on the opposite side wall.

[0021] Impact mechanisms are provided on both ends of the feeding hood 19 to apply lateral impact to the mold body 18 during the feeding process, thereby improving the compaction of the powder. The impact mechanism includes a fixing plate 21 that is fixedly connected to the side wall of the feeding hood 19 by bolts. A rectangular groove 22 is provided at one end of the fixing plate 21 near the side baffle 11. A sliding block 24 (made of stainless steel) is slidably connected in the groove 22. An impact block 25 that cooperates with the protrusion 12 is welded and fixed at one end of the sliding block 24 near the side baffle 11. The impact block 25 is trapezoidal in design (the inclined surface faces the protrusion 12) to facilitate the generation of lateral impact force when in contact with the protrusion 12. The side wall of the sliding block 24 away from the impact block 25 is elastically connected to the inner wall of the groove 22 by a spring 23. The spring 23 is a compression spring that can drive the sliding block 24 to reset.

[0022] The lower end of the mold body 18 has a lifting cavity 14 (cylindrical cavity) inside. The lifting cavity 14 is equipped with an ejection mechanism for ejecting the workpiece formed in the mold groove 20. The ejection mechanism includes a second trapezoidal block 17 (stainless steel) slidably connected inside the lifting cavity 14. A sliding rod 15 (high-strength carbon steel) is slidably connected vertically through the inner wall of the lifting cavity 14. The upper end of the sliding rod 15 passes through the bottom inner wall of the mold groove 20 and is slidably sealed to it. The upper end of the sliding rod 15 is welded and fixed with a lifting plate (not marked in the figure, material is the same as the sliding rod 15) that cooperates with the mold groove 20. The lifting plate is completely embedded in the bottom of the mold groove 20 and is flush with the bottom surface of the mold groove 20 in the initial state. The lower end of the sliding rod 15 is welded and fixed with a first trapezoidal block 16 that cooperates with the second trapezoidal block 17. The inclined surfaces of the first trapezoidal block 16 and the second trapezoidal block 17 are in contact. The first trapezoidal block 16 can be pushed vertically upward by the horizontal movement of the second trapezoidal block 17.

[0023] A horizontal groove 9 is provided on the horizontal plate 8. A connecting rod 10 is slidably connected in the groove 9. The connecting rod 10 is U-shaped (made of stainless steel). One end of the connecting rod is fixedly connected to the side wall of the discharge cover 19 by bolts. The other end passes through the reserved hole in the side wall of the mold body 18 and is slidably connected to it. The end of the connecting rod is welded and fixed to the side wall of the second trapezoidal block 17, so as to realize the linkage between the pushing mechanism and the ejection mechanism. An electric push rod 7 is fixedly connected to the inner wall of the machine body 3 by a bracket. The telescopic end of the electric push rod 7 is fixedly connected to the side wall of the discharge cover 19 by a flange, so as to provide power for the pushing mechanism.

[0024] A rectangular opening 4 is provided on the side wall of the machine body 3. A conveying mechanism 5 (belt conveyor) is installed in the opening 4 through a bracket. The feeding end of the conveying mechanism 5 extends to one side directly above the mold body 18, and the discharging end extends to the outside of the machine body 3. It is used to receive the ejected workpiece and transport it to the next process.

[0025] When using this invention, during the powder conveying stage: the control valve at the lower end of the material tank 2 is opened, and the metal powder enters the discharge hood 19 through the conveying pipe 31 and the feeding pipe 13 until the powder in the discharge hood 19 reaches the preset amount, and then the control valve is closed.

[0026] Material feeding and impact compaction stage: The electric push rod 7 is activated, and its telescopic end pushes the material feeding cover 19 to slide along the horizontal plate 8 towards the mold groove 20; during the movement of the material feeding cover 19, the internal powder is evenly spread in the mold groove 20, and the side baffle 11 prevents the powder from overflowing; at the same time, the impact block 25 of the material feeding cover 19 repeatedly contacts the protrusion 12 of the side baffle 11: the protrusion 12 squeezes the inclined surface of the impact block 25, pushing the sliding block 24 to compress the spring 23; when the impact block 25 passes the protrusion 12, the spring 23 resets and drives the sliding block 24 to impact the impact block 25 in the opposite direction, generating a lateral impact force that is transmitted to the mold body 18, causing the powder in the mold groove 20 to be compacted. The inner top of the machine body 3 is equipped with a compaction mechanism that cooperates with the mold groove 20 for compacting the material in the mold groove 20.

[0027] Workpiece ejection stage: When the material hood 19 slides to its maximum stroke (the powder is completely filled into the mold cavity 20), the connecting rod 10 moves synchronously with the material hood 19, causing the second trapezoidal block 17 to slide horizontally in the lifting cavity 14; the inclined surface of the second trapezoidal block 17 pushes the first trapezoidal block 16 to rise vertically, and the sliding rod 15 drives the lifting plate to lift upward, ejecting the workpiece formed in the mold cavity 20 to the feeding end of the conveying mechanism 5.

[0028] Automated conveying stage: Start the conveying mechanism 5, the ejected workpiece moves with the conveyor belt to the outside of the machine body 3 and enters the next processing step; the electric push rod 7 retracts, driving the unloading cover 19 to reset, the connecting rod 10 pulls the second trapezoidal block 17 to move in the opposite direction, the first trapezoidal block 16 and the sliding rod 15 reset under the action of gravity, the lifting plate returns to the bottom of the mold groove 20, and one processing cycle is completed.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A composite powder metallurgy near-net-shape forming process device, comprising a base (1), characterized in that, The upper end of the base (1) is fixedly connected to the body (3), the upper end of the body (3) is fixedly connected to the material tank (2), the inner bottom of the body (3) is fixedly connected to the mold body (18), the upper end of the mold body (18) is provided with a mold groove (20), the side wall of the mold body (18) and the inner wall of the body (3) are fixedly connected to a horizontal plate (8), the horizontal plate (8) is horizontal with the upper end of the mold body (18), the upper end of the horizontal plate (8) is provided with a pushing mechanism for pushing powdered materials, the pushing mechanism includes a feeding cover (19) slidably connected to the upper end of the horizontal plate (8), the feeding cover (19) and the material tank (2) are connected together. The lower end of the feeding cover (19) is designed to be open through the conveying mechanism. The horizontal plate (8) and the upper end of the mold body (1) are fixedly connected to two symmetrically arranged side baffles (11). The two side baffles (11) are located on both sides of the feeding cover (11). The opposite ends of the two side baffles are fixedly connected to a number of equally spaced protrusions (12). The two side walls of the feeding cover (19) are provided with impact mechanisms for impacting the mold body (18). The lower end of the mold body (18) is provided with a lifting cavity (14). The lifting cavity (14) is provided with an ejection mechanism for ejecting the workpiece in the mold groove (20).

2. The composite powder metallurgy near-net-shape forming process apparatus according to claim 1, characterized in that, The conveying mechanism includes a conveying pipe (31) fixedly connected to the lower end of the material tank (2). The lower end of the conveying pipe (31) is connected to the material discharge cover (19) through a feeding pipe (13), which is a corrugated pipe.

3. The composite powder metallurgy near-net-shape forming process apparatus according to claim 2, characterized in that, The impact mechanism includes a fixed plate (21) fixedly connected to the side wall of the feed hood (19). The fixed plate (21) has a groove (22) at one end near the side baffle (11). A sliding block (24) is slidably connected in the groove (22). An impact block (25) that cooperates with the protrusion (12) is fixedly connected at one end of the sliding block (24) near the side baffle (11). The impact block (25) is trapezoidal in shape. The side wall of the sliding block (24) and the inner wall of the groove (22) are elastically connected by a spring (23).

4. The composite powder metallurgy near-net-shape forming process apparatus according to claim 3, characterized in that, The ejection mechanism includes a second trapezoidal block (17) slidably connected inside the lifting cavity (14). A sliding rod (15) is slidably connected through the inner wall of the lifting cavity (14). The sliding rod (15) passes through the inner wall of the mold groove (20) and is slidably connected thereto. The upper end of the sliding rod (15) is fixedly connected to a lifting plate that cooperates with the mold groove (20). The lifting plate is set inside the mold groove (20). The lower end of the sliding rod (15) is fixedly connected to a first trapezoidal block (16) that cooperates with the second trapezoidal block (17).

5. The composite powder metallurgy near-net-shape forming process apparatus according to claim 4, characterized in that, A through groove (9) is provided on the horizontal plate (8), and a connecting rod (10) is slidably connected in the through groove (9). The connecting rod (10) is U-shaped. One end of the connecting rod (10) is fixedly connected to the side wall of the material feeding cover (19), and the other end is fixedly connected to the end of the second U-shaped block (17). The connecting rod (10) passes through the side wall of the mold body (18) and is slidably connected to it.

6. The composite powder metallurgy near-net-shape forming process apparatus according to claim 5, characterized in that, An electric push rod (7) is fixedly connected to the inner wall of the machine body (3), and the telescopic end of the electric push rod (7) is fixedly connected to the side wall of the feeding hood (19).

7. The composite powder metallurgy near-net-shape forming process apparatus according to claim 6, characterized in that, An opening (4) is provided on the side wall of the machine body (3), and a conveying mechanism (5) is provided in the opening (4). The conveying mechanism (5) is used for the product after the mold body (18) is processed. The conveying mechanism (5) extends to the outside of the machine body (3).

8. The composite powder metallurgy near-net-shape forming process apparatus according to claim 7, characterized in that, A motor (27) is fixedly connected to the upper end of the material tank (2). A drive rod (29) is fixedly connected to the output shaft of the motor (27). Multiple sets of equally spaced stirring blades (28) are fixedly connected to the side wall of the drive rod (29). The drive rod (29) extends into the conveying pipe (31). A conveying blade (30) is fixedly connected to one end of the drive rod (29) located in the conveying pipe (31).

9. A composite powder metallurgy near-net-shape forming process apparatus according to claim 8, characterized in that, An observation window (6) is provided on the front side wall of the machine body (3), and a compaction mechanism that cooperates with the mold groove (20) is installed on the inner top of the machine body (3) for compacting the material in the mold groove (20).

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