Pressing and powder filling device for powder metallurgy

Abstract

The utility model relates to the technical field of powder metallurgy, and provides a powder pressing and filling device for powder metallurgy, which aims at solving the problem that burrs or poor surface flatness are easily caused on the surface of a product when an existing powder metallurgy die is used, and comprises an operation table, and a powder filling box is arranged on the surface of the operation table. A plurality of powder loading mechanisms are arranged in the powder loading box; the powder filling mechanism comprises an outer die sleeve and an inner die sleeve, the inner side wall of the outer die sleeve is slidably connected with the outer side wall of the inner die sleeve, and a plurality of sliding assemblies are arranged between the inner side wall of the outer die sleeve and the outer side wall of the inner die sleeve. According to the compact powder filling device for powder metallurgy, powder is limited and protected through the inner die sleeve, after powder filling and compaction are finished, the inner die sleeve is taken out through rotation, the contact face of the powder and the die is kept flat, and finally the flatness of the surface of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, in particular to a compact powder charging device for powder metallurgy. Background Art

[0002] The industrial production of metal powder metallurgy involves numerous process steps, including powder loading, pressing, and sintering. Before loading the raw powder into a mold for pressing, the mold must be vibrated and compacted to ensure uniform distribution of the raw powder within the mold, thus preventing issues such as missing corners or insufficient material in the final product.

[0003] To this end, patent publication number CN218656809U provides a novel vibratory powder metallurgy mold, comprising a rigid mold sleeve, a flexible mold sleeve, a mold core, a base, connecting claws, and a vibration assembly. The mold core is fixedly mounted on the base, the rigid mold sleeve is mounted on and cooperates with the base, the mold core and the rigid mold sleeve are coaxially arranged, the inner wall of the rigid mold sleeve is provided with the flexible mold sleeve that cooperates with the rigid mold sleeve, the outer wall of the rigid mold sleeve is symmetrically provided with at least two connecting claws, the connecting claws and the base are in contact with the vibration assembly, and a mold cavity is formed between the inner wall of the flexible mold sleeve and the outer wall of the mold core. This mold directly and evenly loads metal powder particles into the mold cavity, filling the entire mold cavity. When the mold is shaken evenly by the vibration assembly, it can effectively avoid the waste of excess powder, and the compact is uniform in all directions, which is not prone to pressing defects. This solves the problem of excessive raw material consumption in the powder filling process in the traditional powder metallurgy industry and can also improve processing efficiency.

[0004] However, the existing metallurgical powder charging and pressing process as described above has the following problems: before pressing, the powder needs to be loaded into the powder charging mold and compacted by vibration or other means, and then subsequent pressing and sintering processes are carried out. This process involves the transfer of the compacted powder or local workpieces of the mold, which will cause defects on the surface of the initially formed powder compact.

[0005] Therefore, there is an urgent need for a powder metallurgy green compact powder loading device that can keep the surface of the powder green compact clean and complete. Utility Model Content

[0006] The purpose of this utility model is to solve the problem that existing powder metallurgy molds are prone to burrs or poor surface flatness on the product surface during use. This application provides a powder metallurgy compact powder charging device, which uses an inner mold sleeve to limit and protect the powder. After the powder is charged and vibrated, the inner mold sleeve is removed by rotation, so that the contact surface between the powder and the mold remains flat, ultimately improving the flatness of the product surface.

[0007] The utility model is achieved through the following technical solutions:

[0008] A powder charging device for powder metallurgy compacts comprises an operating table, a powder charging box is arranged on the surface of the operating table, and a plurality of powder charging mechanisms are arranged in the powder charging box; the powder charging mechanisms comprise an outer die sleeve and an inner die sleeve, the inner side wall of the outer die sleeve is slidably connected to the outer side wall of the inner die sleeve, and a plurality of sliding components are arranged between the inner side wall of the outer die sleeve and the outer side wall of the inner die sleeve.

[0009] Preferably, the sliding assembly includes a limit block arranged on the outer side wall of the inner mold sleeve and a fold line track on the inner side wall of the outer mold sleeve, and the limit block is slidably connected to the fold line track.

[0010] Preferably, the operating table further includes a vibration platform, the powder box is located on the surface of the vibration platform, and the vibration platform is detachably connected to the operating table.

[0011] Preferably, the bottom of the vibration platform is connected to the surface of the operating table via a support rod, and the support rod is movably connected to the operating table.

[0012] Preferably, a shaking mechanism is embedded in the operating table near the bottom of the support rod, and the shaking mechanism includes multiple translation plates and lifting columns arranged at the bottom of the multiple translation plates; when the multiple translation plates approach each other, the bottom of the support rod abuts against the surfaces of the multiple translation plates; when the multiple translation plates move away from each other, the bottom of the support rod abuts against the top of the lifting column.

[0013] Preferably, the operating table surface is provided with a recovery trough, the recovery trough is arranged around the edge of the operating table surface, and the top of the recovery trough faces the edge of the vibration platform.

[0014] Preferably, a table frame is provided at the bottom of the operating table, and the table frame is provided with a storage tank, and the storage tank is connected to the recovery tank through a pipeline.

[0015] Preferably, in the powder loading box, the multiple powder loading mechanisms are distributed in a matrix.

[0016] The technical solution of the utility model has the following beneficial effects:

[0017] The powder metallurgy compact powder loading device of the utility model limits and protects the powder by means of an inner die sleeve. After the powder loading and vibration are completed, the inner die sleeve is removed by rotation, so that the contact surface between the powder and the die remains flat, thereby ultimately improving the flatness of the product surface. In addition, the shaking mechanism arranged between the vibration platform and the operating table can enable the powder loading box to achieve a more prominent vibration effect through rapid falling and impact, thereby promoting the uniform distribution and compaction of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the main structure of the powder metallurgy compact powder charging device in Example 1;

[0020] Figure 2 This is a schematic top view of the powder metallurgy compact powder charging device in Example 1;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure of the partially enlarged portion A in FIG;

[0022] Figure 4 Schematic diagram of the cross-sectional structure of the powder loading mechanism in Example 1;

[0023] Figure 5 Schematic diagram of the structure of the inner mold sleeve in Example 1;

[0024] Figure 6 Schematic diagram of the cross-sectional structure of the outer mold sleeve in Example 1;

[0025] Figure 7 Schematic diagram of the cross-sectional structure of the shaking mechanism in Example 1 (when multiple translation plates are close to each other);

[0026] Figure 8 for Figure 7 A schematic diagram of the structure of a partially enlarged portion of part B;

[0027] Figure 9 Schematic diagram of the cross-sectional structure of the shaking mechanism in Example 1 (when multiple translation plates are separated);

[0028] Figure 10 for Figure 9 Schematic diagram of the structure of the local enlargement of part C in the figure.

[0029] Icons: 1-operating table, 11-table frame, 2-powder box, 31-outer mold sleeve, 32-inner mold sleeve, 41-limit block, 42-broken line track, 5-vibration platform, 51-support rod, 52-translation plate, 53-lifting column, 54-lifting cylinder, 55-vibration motor, 61-recovery trough, 62-storage box. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] Example 1

[0034] like Figures 1 to 10 As shown, this embodiment provides a powder charging device for powder metallurgy blanks, including an operating table 1, a powder charging box 2 is arranged on the surface of the operating table 1, and 36 powder charging mechanisms distributed in a 3*12 matrix are arranged in the powder charging box 2; the powder charging mechanism includes an outer mold sleeve 31 and an inner mold sleeve 32, the inner side wall of the outer mold sleeve 31 and the outer side wall of the inner mold sleeve 32 are slidably connected, and multiple groups of sliding components are arranged between the inner side wall of the outer mold sleeve 31 and the outer side wall of the inner mold sleeve 32, and the sliding component includes a limit block 41 arranged on the outer side wall of the inner mold sleeve 32, and a broken line track 42 on the inner side wall of the outer mold sleeve 31, and the limit block 41 is slidably connected to the broken line track 42.

[0035] In this embodiment, the powder is limited and protected by the inner mold sleeve 32. After the powder is loaded and vibrated, the inner mold sleeve 32 is removed by rotation to keep the contact surface between the powder and the mold flat, thereby ultimately improving the flatness of the product surface.

[0036] In this embodiment, the operating table 1 also includes a vibration platform 5, and the powder box 2 is located on the surface of the vibration platform 5. The vibration platform 5 is equipped with a drive motor to provide vibration power; the bottom of the vibration platform 5 is connected to the surface of the operating table 1 through a support rod 51, and the support rod 51 is movably connected to the operating table 1; the operating table 1 is embedded with a shaking mechanism near the bottom of the support rod 51, and the shaking mechanism includes multiple translation plates 52 and lifting columns 53 arranged at the bottom of the multiple translation plates 52. The lifting columns 53 are equipped with lifting cylinders 54 to drive the lifting columns 53 to rise and fall; when the multiple translation plates 52 approach, the bottom of the support rod 51 abuts against the surface of the multiple translation plates 52; when the multiple translation plates 52 move away, the bottom of the support rod 51 abuts against the top of the lifting column 53.

[0037] In this embodiment, the shaking mechanism disposed between the vibration platform 5 and the operating table 1 can enable the powder box 2 to achieve a more prominent vibration effect through rapid falling and impact, thereby promoting uniform distribution and compaction of the powder.

[0038] In this embodiment, the drive motor and lift cylinder 54 are equipped with common power and control mechanisms, such as a power supply and a controller. The power supply can be a conventional industrial power supply, and the controller can be a single-chip microcomputer (e.g., an 8051 series single-chip microcomputer, an STM32 series single-chip microcomputer), an FPGA programmable controller, etc. Those skilled in the art will select and configure the necessary conventional mechanisms based on specific usage requirements and actual conditions.

[0039] In this embodiment, a recovery trough 61 is provided on the surface of the operating table 1. This trough 61 runs along the edge of the operating table 1, with its top facing the edge of the vibration platform 5. A table frame 11 is mounted on the bottom of the operating table 1, which is equipped with a storage tank 62. This storage tank 62 is connected to the recovery trough 61 via a pipe. During the vibration process, scattered metal powder can be collected through the recovery trough 61 and the recovery tank, reducing material waste and maintaining a clean and tidy operating environment.

[0040] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A powder metallurgy compact powder charging device, characterized in that: It comprises an operating table (1), wherein a powder loading box (2) is arranged on the surface of the operating table (1), and a plurality of powder loading mechanisms are arranged in the powder loading box (2); The powder loading mechanism comprises an outer mold sleeve (31) and an inner mold sleeve (32), wherein the inner side wall of the outer mold sleeve (31) is slidably connected to the outer side wall of the inner mold sleeve (32), and a plurality of sliding components are arranged between the inner side wall of the outer mold sleeve (31) and the outer side wall of the inner mold sleeve (32).

2. The powder metallurgy green compact charging device according to claim 1, characterized in that: The sliding assembly comprises a limit block (41) arranged on the outer side wall of the inner mold sleeve (32) and a folded track (42) on the inner side wall of the outer mold sleeve (31), wherein the limit block (41) is slidably connected to the folded track (42).

3. The powder metallurgy green compact charging device according to claim 1 or 2, characterized in that: The operating table (1) further comprises a vibration platform (5), the powder box (2) is located on the surface of the vibration platform (5), and the vibration platform (5) is detachably connected to the operating table (1).

4. The powder metallurgy green compact charging device according to claim 3, characterized in that: The bottom of the vibration platform (5) is connected to the surface of the operating table (1) via a support rod (51), and the support rod (51) is movably connected to the operating table (1).

5. The powder metallurgy green compact charging device according to claim 4, characterized in that: The operating platform (1) is embedded with a shaking mechanism at a position close to the bottom of the support rod (51), and the shaking mechanism includes a plurality of translation plates (52) and a lifting column (53) arranged at the bottom of the plurality of translation plates (52); When the multiple translation plates (52) approach each other, the bottom of the support rod (51) abuts against the surfaces of the multiple translation plates (52); when the multiple translation plates (52) move away from each other, the bottom of the support rod (51) abuts against the top of the lifting column (53).

6. The powder metallurgy green compact charging device according to claim 3, characterized in that: The surface of the operating table (1) is provided with a recovery groove (61), the recovery groove (61) is arranged around the edge of the surface of the operating table (1), and the top of the recovery groove (61) faces the edge of the vibration platform (5).

7. The powder metallurgy green compact charging device according to claim 6, characterized in that: A table frame (11) is provided at the bottom of the operating table (1), and the table frame (11) is provided with a storage box (62). The storage box (62) is connected to the recovery tank (61) through a pipeline.

8. The powder metallurgy green compact charging device according to claim 1, characterized in that: In the powder loading box (2), the multiple powder loading mechanisms are distributed in a matrix.

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