Micron-sized powder compaction equipment

Abstract

The utility model discloses micron-sized powder compaction equipment. The micron-sized powder compaction equipment comprises a shell, a barrel, a plurality of protruding structures, a driving assembly and a pressing block. A containing cavity is formed in the shell, a containing hole communicated with the containing cavity is formed in the top of the shell, the barrel is inserted into the containing hole, the top end of the barrel is open, the bottom end of the barrel is located in the containing cavity, the barrel is used for containing micron-sized powder, and the multiple protruding structures are arranged on the hole wall of the containing hole and surround the barrel. The driving assembly comprises an eccentric wheel arranged in the containing cavity, a rotating shaft of the eccentric wheel is perpendicular to the central axis of the barrel, the eccentric wheel makes contact with the bottom end of the barrel and is used for driving the barrel to move back and forth along the containing hole, and the pressing block is used for being inserted into the barrel and compacting the micron-sized powder in the barrel in a vibrating mode. The protruding structures arranged in the containing holes can reduce the contact area between the circumferential outer wall of the barrel body and the inner walls of the containing holes, the friction force generated when the barrel body vibrates is reduced, and the working efficiency of the micron-sized powder compaction equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of jolt equipment, specifically relates to a micron grade powder jolt equipment. BACKGROUND

[0002] Sintering performance is an important index for evaluating the performance of a metal powder. Generally, the test of sintering performance of a laboratory powder often uses loose sintering and compact sintering. Loose sintering is to fill the powder in a mold of a certain shape for sintering. Compact sintering is to press the powder into a green body of fixed shape and density by a press. During the production of the green body, a certain amount of powder metallurgy lubricant is usually added, and the addition of the lubricant may affect the performance of the sintered powder.

[0003] During the sintering test of micron grade metal powder, the friction between the micron grade powder particles is large, and the powder has no flowability. When the micron grade metal powder is filled into the mold, the powder in the mold cannot be uniformly distributed, and there are large pores in some areas. Moreover, the powder on the surface of the mold cannot be evenly coated and scraped. When the micron grade metal powder is pressed into a green body, the green body is prone to break up into layers, and the green body has very low strength and is easy to break and fall off. Even if a large amount of powder metallurgy lubricant is added, a green body with complete shape cannot be formed.

[0004] Currently, there is also a method of using slurry to produce a green body. The metal powder with micron grade average particle size is configured into a metal slurry with a solid content rate of about 90% by mixing with anhydrous ethanol. Then, the metal slurry is filled into a graphite mold. Subsequently, the solvent is dried at a lower temperature using an oven. Then, the metal slurry with the dried solvent is sintered at different temperatures. This method can test the density of the sintered block after sintering. However, due to the different settling speeds of metal powders of different sizes in the solvent, there is a significant difference between the upper and lower surfaces of the sintered block. Moreover, the powder is prone to cracking during the drying and sintering processes. Therefore, multiple sintered blocks of different sizes are often formed in one mold. These sintered blocks are irregular in shape, and only the density after sintering can be tested, and the error is large.

[0005] Therefore, in order to improve the accuracy of the test of the sintering performance of the metal powder, the metal powder can be jolted before being sintered for testing. However, the current powder jolting mainly relies on manual jolting. Even if a jolting device is used for jolting, the jolting efficiency is low, and the test demand cannot be met.

[0006] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the utility model and should not be regarded as an acknowledgment or any form of suggestion that it forms prior art that is publicly known. CONTENT OF THE UTILITY MODEL

[0007] The utility model discloses a micron level powder jolt ramming equipment, which is used to solve the problems of low working efficiency of the existing jolt ramming equipment and easy stratification and uneven upper surface of micron level metal powder.

[0008] In order to realize the above-mentioned purpose, the utility model discloses a micron level powder jolt ramming equipment, which comprises a shell, a cylinder, a plurality of convex structures, a driving assembly and a pressing block. The inside of the shell is provided with a containing cavity, and the top is provided with a containing hole in communication with the containing cavity. The cylinder is inserted into the containing hole. The top end of the cylinder is open, and the bottom end is located in the containing cavity. The cylinder is used for containing micron level powder. The plurality of convex structures are arranged on the hole wall of the containing hole and surround the cylinder. The driving assembly comprises an eccentric wheel arranged in the containing cavity. The rotation axis of the eccentric wheel is perpendicular to the central axis of the cylinder. The eccentric wheel is in contact with the bottom end of the cylinder and is used for driving the cylinder to reciprocate along the containing hole. The pressing block is used for being inserted into the cylinder and jolt ramming the micron level powder in the cylinder.

[0009] In one or more embodiments of the utility model, the plurality of convex structures are arranged in layers along the axial direction of the containing hole.

[0010] In one or more embodiments of the utility model, the convex structure is a sphere embedded in the hole wall of the containing hole.

[0011] In one or more embodiments of the utility model, the sphere is in rolling connection with the hole wall of the containing hole.

[0012] In one or more embodiments of the utility model, the driving assembly further comprises a connecting shaft connected with the eccentric wheel and a motor driving the rotation of the connecting shaft.

[0013] In one or more embodiments of the utility model, the micron level powder jolt ramming equipment further comprises an elastic pad arranged at the bottom end of the cylinder.

[0014] In one or more embodiments of the utility model, the micron level powder jolt ramming equipment further comprises an elastic member and a support. The top end of the elastic member is connected with the support, and the bottom end is connected with the top end of the pressing block.

[0015] In one or more embodiments of the utility model, the bottom end of the elastic member is provided with a first hook, and the top end of the pressing block is provided with a first carabiner matched with the first hook.

[0016] In one or more embodiments of the utility model, the top end of the elastic member is provided with a second hook, and the support is provided with a second carabiner matched with the second hook.

[0017] In one or more embodiments of the utility model, the shell and the cylinder are made of transparent material.

[0018] In one or more embodiments of the utility model, the circumferential wall of the cylinder is provided with the first scale line arranged in the axial direction.

[0019] In one or more embodiments of the utility model, the circumferential wall of the cylinder is provided with the first scale line arranged in the axial direction.

[0020] In one or more embodiments of the utility model, the cross section of the accommodating hole and the cylinder is rectangular or circular.

[0021] Compared with the prior art, the driving assembly of the utility model has simple structure and high stability, the eccentric wheel can drive the cylinder to vibrate up and down along the accommodating hole, and the pressing block in the cylinder can also continuously impact the micron-level powder at the bottom in the vertical direction in the process of cylinder vibration, so that the micron-level powder is vibrated and compacted. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0023] Figure 1 It is the structure schematic view of micron-level powder vibration and compaction equipment in the embodiment one of the utility model;

[0024] Figure 2 It is the working state diagram of micron-level powder vibration and compaction equipment in the embodiment one of the utility model;

[0025] Figure 3 It is the structure schematic view of micron-level powder vibration and compaction equipment in the embodiment two of the utility model;

[0026] Figure 4 It is the structure schematic view of micron-level powder vibration and compaction equipment in the embodiment three of the utility model;

[0027] Figure 5 It is the perspective view of cylindrical cylinder;

[0028] Figure 6 It is the perspective view of cubic cylinder.

[0029] Main drawing mark explanation: 1, shell, 101, accommodating cavity, 102, accommodating hole, 2, cylinder, 3, convex structure, 4, driving assembly, 401, eccentric wheel, 402, connecting shaft, 5, pressing block, 6, elastic pad, 7, elastic piece, 8, support, 9, first hook, 10, second hook, 11, first hook ring, 12, second hook ring. DETAILED DESCRIPTION

[0030] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0031] Example 1:

[0032] Reference Figure 1 and Figure 2 As shown, this embodiment provides a micron-level powder compaction device, which includes a housing 1, a cylindrical body 2, multiple protruding structures 3, a drive assembly 4, and a pressure block 5. The housing 1 has an internal accommodating cavity 101, and a accommodating hole 102 is formed at the top of the housing 1, communicating with and located at the top of the accommodating cavity 101. The cylindrical body 2 is used to accommodate micron-level powder, and is inserted into the accommodating hole 102. The top end of the cylindrical body 2 is open, and the bottom end is located within the accommodating cavity 101, allowing the micron-level powder to enter the cylindrical body 2 through the top end. Multiple protruding structures 3 are disposed on the wall of the accommodating hole 102 and surround the cylindrical body 2. The drive assembly 4 includes an eccentric wheel 401 disposed within the accommodating cavity 101. The rotation axis of the eccentric wheel 401 is perpendicular to the central axis of the cylinder 2. The eccentric wheel 401 contacts the bottom end of the cylinder 2 and is used to drive the cylinder 2 to reciprocate along the accommodating hole 102. The pressure block 5 is inserted into the cylinder 2. During the up-and-down movement of the cylinder 2 along the accommodating hole 102, the pressure block 5 can compact the micron-sized powder inside the cylinder 2.

[0033] According to the above structural design, the operator can pour micron-sized powder into the cylinder 2, and then insert the cylinder 2 into the receiving hole 102 on the shell 1. Then, the pressure block 5 is placed into the cylinder 2, compressing the micron-sized powder from the top. Next, the eccentric wheel 401 is driven to rotate, and during this rotation, the eccentric wheel 401 drives the cylinder 2 to move up and down along the receiving hole 102, which is equivalent to driving the cylinder 2 to vibrate up and down. During the up-and-down vibration of the cylinder 2, the pressure block 5 inside also generates a small amplitude vibration in the vertical direction, continuously impacting the micron-sized powder at its bottom, compacting the powder to form a blank.

[0034] And, in the process of vibrating the micron-level powder, due to the protruding structure 3 arranged on the hole wall of the accommodating hole 102, the circumferential outer wall of the cylinder body 2 is in contact with the protruding structure 3 when the cylinder body 2 moves up and down, rather than in contact with the hole wall of the accommodating hole 102, thereby reducing the contact area between the circumferential outer wall of the cylinder body 2 and the surrounding objects, reducing the friction when the cylinder body 2 vibrates up and down, and improving the working efficiency of the micron-level powder vibrating device.

[0035] Referring to Figure 1 In the embodiment, the plurality of protruding structures 3 are arranged in layers along the axial direction of the accommodating hole 102, and the number of protruding structures 3 in each layer is consistent. In addition, the plurality of protruding structures 3 in each layer are distributed at equal intervals.

[0036] Further, the two adjacent protruding structures 3 in the upper and lower two layers are distributed at equal intervals in the vertical direction, that is, the plurality of protruding structures 3 are arranged at equal intervals in the vertical direction from the bottom layer.

[0037] Referring to Figure 1 In order to further reduce the contact area between the circumferential outer wall of the cylinder body 2 and the protruding structure 3, the protruding structure 3 in the embodiment is arranged as a curved surface away from the hole wall of the accommodating hole 102, and the protruding structure 3 is in point contact with the circumferential outer wall of the cylinder body 2 through the curved surface, thereby reducing the friction between the cylinder body 2 and the protruding structure 3 and further improving the working efficiency of the micron-level powder vibrating device.

[0038] Referring to Figure 1 and Figure 2 The driving assembly 4 of the embodiment further includes a connecting shaft 402 and a motor. One end of the connecting shaft 402 is connected to the rotation center of the eccentric wheel 401, and the other end is connected to the output end of the motor. The eccentric wheel 401 is driven to rotate synchronously by driving the connecting shaft 402 to rotate through the motor, thereby driving the cylinder body 2 to move up and down along the accommodating hole 102.

[0039] Referring to Figure 1 and Figure 2 The micron-level powder vibrating device of the embodiment further includes an elastic pad 6, which is arranged at the bottom end of the cylinder body 2 and in contact with the bottom end of the elastic pad 6. The elastic pad 6 is used to reduce the impact force between the cylinder body 2 and the eccentric wheel 401, thereby protecting the cylinder body 2 and preventing the cylinder body 2 from being damaged after being impacted by the eccentric wheel 401 for a long time, thereby improving the service life of the cylinder body 2.

[0040] The shell 1 and the cylinder body 2 of the embodiment are made of transparent material, and the operator can directly observe the vibrating state of the micron-level powder inside the cylinder body 2 and the volume change of the micron-level powder by naked eye.

[0041] Furthermore, in this embodiment, the circumferential wall of the cylinder 2 is provided with axially arranged first scale lines, which can be set as height scale lines. After the micron-sized powder is compacted to form a billet, the operator can read the height of the billet through the first scale line, eliminating the need to use calipers or other equipment to measure the height of the billet.

[0042] Alternatively, the first scale line can also be set as a volume scale line, through which the operator can read the volume of the blank.

[0043] In this embodiment, the peripheral wall of the pressure block 5 is provided with a second scale line arranged axially. The second scale line is used to measure the height or volume of the pressure block 5 inserted into the cylinder 2, and then the height or volume of the blank in the cylinder 2 is calculated in reverse based on the height or volume of the cylinder 2.

[0044] Understandably, in practical applications, operators can choose to use either the first or second scale line according to their personal habits. Alternatively, operators can use both the first and second scale lines simultaneously to obtain two heights or volumes, and then calculate their average.

[0045] It should be noted that a cylinder 2 can be equipped with multiple pressure blocks 5 of different weights and heights, so that the operator can select the appropriate pressure block 5 to compact the micron-sized powder inside the cylinder 2.

[0046] In addition, the shape and area of ​​the cross-section of the pressure block 5 should be as consistent as possible with the shape and area of ​​the cross-section of the cavity inside the cylinder 2. Alternatively, the area of ​​the cross-section of the pressure block 5 may be slightly smaller than the area of ​​the cross-section of the cavity inside the cylinder 2.

[0047] In other embodiments, the shell 1 and the cylinder 2 can also be made of non-transparent materials. Since the depth inside the cylinder 2 can be measured before compacting the micron-sized powder, after compacting the powder, the zero mark of the ruler is inserted into the cylinder 2 with the zero mark facing down, and the top of the cylinder 2 of the micron-sized powder can be measured, thereby calculating the height of the micron-sized powder.

[0048] Furthermore, in order to facilitate the sintering or mechanical strength testing of the blank formed by the tapped micron-sized powder, the cross-sections of the receiving hole 102 and the cylinder 2 can be set as rectangular, circular or other regular shapes.

[0049] In addition, based on actual testing experience, the cross-sectional area of ​​the internal cavity of cylinder 2 should be within 2 cm². 2 The above items are 5cm or more in height and 10cm or more in volume. 3 above.

[0050] Example 2:

[0051] Reference Figure 3As shown, this embodiment provides a micron-level powder compaction device, which includes a housing 1, a cylinder 2, multiple protruding structures 3, a drive assembly 4, and a pressing block 5. The structures of the housing 1, cylinder 2, drive assembly 4, and pressing block 5 are the same as those in Embodiment 1, except for the structure of the protruding structures 3.

[0052] Specifically, in this embodiment, the protruding structure 3 is set as a sphere, with a part of the sphere embedded in the wall of the receiving hole 102 and the other part protruding from the wall of the receiving hole 102.

[0053] Preferably, the sphere is rolled into the wall of the receiving hole 102, which further reduces the friction between the cylinder 2 and the sphere when the cylinder moves up and down, and improves the working efficiency of the micron-level powder compaction equipment.

[0054] Example 3:

[0055] Reference Figure 3 As shown, this embodiment provides a micron-level powder compaction device, which includes a housing 1, a cylinder 2, multiple protruding structures 3, a drive assembly 4, and a pressure block 5. The structures of the housing 1, cylinder 2, drive assembly 4, and pressure block 5 are the same as those in Embodiment 2, except that the micron-level powder compaction device in this embodiment also includes an elastic element 7 and a support 8.

[0056] Specifically, the top end of the elastic element 7 is connected to the bracket 8, and the bottom end is connected to the top end of the pressure block 5. The elastic element 7 can fix the pressure block 5 to prevent it from being discarded after compacting the micron-sized powder, and it can also use its own elastic force to increase the impact force of the pressure block 5 on the micron-sized powder, thereby improving the working efficiency of the micron-sized powder compaction equipment.

[0057] Furthermore, to facilitate the connection of the pressure block 5 to the bracket 8 via the elastic element 7, a first hook 9 is provided at the bottom end of the elastic element 7, and a first hook ring 11 that cooperates with the first hook 9 is provided at the top end of the pressure block 5. A second hook 10 is provided at the top end of the elastic element 7, and a second hook ring 12 that cooperates with the second hook 10 is provided on the bracket 8. This makes it extremely convenient to assemble or disassemble the pressure block 5 or the elastic element 7.

[0058] Preferably, the elastic element 7 can be a metal spring.

[0059] In practical applications, when it is necessary to test parameters such as porosity, axial shrinkage, radial shrinkage, and volumetric shrinkage after powder sintering, a suitable method can be selected. Figure 5 The cylindrical cylinder 2 shown is vibrated to form a cylindrical blank, which is then sintered, and the corresponding parameters are tested. Table 1 below shows the actual test results of various test methods. The sintering raw material is a 4-micron spherical copper powder with no flowability. The height unit in Table 1 is mm, and the volume unit is cm.3 Weight (mass) is measured in grams, and density is measured in g / cm³. 3 .

[0060] Table 1

[0061]

[0062] As can be seen from the test data in Table 1, compared with the slurry method, which can only test the sintering density and porosity of the sintered block, and the data in the same group has a large deviation, the micron-level powder compaction equipment in any of the above embodiments can be used to prepare the billet and then sinter it, which can obtain various test data more comprehensively and accurately. The test data is relatively more accurate and the error is relatively smaller.

[0063] When it is necessary to test the mechanical strength parameters of powder after sintering, one can choose, such as Figure 6 The cubic cylinder 2 shown is vibrated to form a cubic blank, which is then sintered, and the corresponding mechanical strength parameters are tested. Table 2 below shows the actual test results. It can be seen that the test data of the blank prepared by the micron-level powder vibrating device in any of the above embodiments is relatively stable and can accurately reflect the actual mechanical strength of the micron-level metal powder after sintering.

[0064] Table 2

[0065] Sample width b Sample height h Span Ls Maximum force Bending strength σbb mm mm mm N MPa Sample 1 12.06 6.44 25.4 4296.9399 327.3145 Sample 2 12.09 6.42 25.4 4264.5801 326.0655 Sample 3 12.04 6.39 25.4 4174.0601 323.4859 Sample 4 11.98 6.34 25.4 4099.98 324.3929

[0066] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A micron-level powder compaction device, characterized in that, include: The housing (1) has an internal cavity (101) and a top opening with a cavity (102) communicating with the cavity (101); A cylindrical body (2) is inserted into the receiving hole (102). The top end of the cylindrical body (2) is open and the bottom end is located in the receiving cavity (101). The cylindrical body (2) is used to contain micron-sized powder. Multiple protruding structures (3) are provided on the wall of the receiving hole (102) and surround the cylinder (2); The drive assembly (4) includes an eccentric wheel (401) disposed in the accommodating cavity (101), the rotation axis of the eccentric wheel (401) being perpendicular to the central axis of the cylinder (2), the eccentric wheel (401) contacting the bottom end of the cylinder (2), and being used to drive the cylinder (2) to reciprocate along the accommodating hole (102); A compaction block (5) is used to insert into the cylinder (2) and compact the micron-sized powder inside the cylinder (2).

2. The micron-level powder compaction device according to claim 1, characterized in that, The plurality of protruding structures (3) are arranged in layers along the axial direction of the receiving hole (102).

3. The micron-level powder compaction device according to claim 1, characterized in that, The protruding structure (3) is a sphere embedded in the wall of the receiving hole (102).

4. The micron-level powder compaction device according to claim 3, characterized in that, The sphere is in rolling connection with the wall of the receiving hole (102).

5. The micron-level powder compaction device according to claim 1, characterized in that, The drive assembly (4) also includes a connecting shaft (402) connected to the eccentric wheel (401) and a motor that drives the connecting shaft (402) to rotate.

6. The micron-level powder compaction device according to claim 1, characterized in that, The micron-level powder compaction device also includes an elastic pad (6) disposed at the bottom end of the cylinder (2).

7. The micron-level powder compaction device according to claim 1, characterized in that, The micron-level powder compaction device also includes an elastic element (7) and a support (8). The top end of the elastic element (7) is connected to the support (8), and the bottom end is connected to the top end of the pressure block (5).

8. The micron-level powder compaction device according to claim 7, characterized in that, The bottom end of the elastic element (7) is provided with a first hook (9), and the top end of the pressure block (5) is provided with a first hook ring (11) that cooperates with the first hook (9); and / or, The top end of the elastic element (7) is provided with a second hook (10), and the bracket (8) is provided with a second hook ring (12) that cooperates with the second hook (10).

9. The micron-level powder compaction device according to claim 1, characterized in that, The shell (1) and cylinder (2) are made of transparent material; and / or, The cylindrical body (2) has axially arranged first scale lines on its peripheral wall; and / or, The pressure block (5) has axially arranged second scale lines on its peripheral wall.

10. The micron-level powder compaction device according to claim 1, characterized in that, The cross-sections of the receiving hole (102) and the cylinder (2) are rectangular or circular.

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